CN107727580A - Foreign Fiber Detecting Device and method - Google Patents

Foreign Fiber Detecting Device and method Download PDF

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Publication number
CN107727580A
CN107727580A CN201711036153.1A CN201711036153A CN107727580A CN 107727580 A CN107727580 A CN 107727580A CN 201711036153 A CN201711036153 A CN 201711036153A CN 107727580 A CN107727580 A CN 107727580A
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light
wave
predetermined
thing
detected
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房徐
杨艺
王爽
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Luster LightTech Co Ltd
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Luster LightTech Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/21—Polarisation-affecting properties
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
    • G01N21/3563—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing solids; Preparation of samples therefor
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
    • G02B27/283—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for beam splitting or combining

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  • General Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
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  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Optics & Photonics (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

The embodiments of the invention provide a kind of Foreign Fiber Detecting Device and method, the difference of the absorption for different and/or to specific band the light waves that the embodiment of the present invention is influenceed using thing to be detected from foreign fiber on the polarization direction of light detects in thing to be detected whether contain foreign fiber, the technical scheme detected relative to the difference using foreign fiber and thing color to be detected, the accuracy of detection of the embodiment of the present invention effectively improves, and the embodiment of the present invention is to carry out foreign fiber detection based on light wave, therefore do not influenceed by thing translational speed to be detected, ensure that the precision of opposite sex detection detection.Other detection of the embodiment of the present invention to foreign fiber is automatically performed by devices such as beam splitter and optical gating elements, and detection efficiency is effectively improved.

Description

Foreign Fiber Detecting Device and method
Technical field
The present embodiments relate to technical field of optical detection, and detect and fill more particularly, to a kind of foreign fiber Put and method.
Background technology
During harvesting, storage and purchase of cotton etc., it is easy to be mixed into foreign fiber.Foreign fiber mainly includes third Synthetic fibre silk, woven bag, the piece of sack, the colored leftover of bolt of cloth and hair etc..According to color distinction, foreign fiber can be divided into two kinds of classifications： First kind foreign fiber, its color and cotton difference are larger, and its also exist in molecular structure etc. with cotton it is larger Difference, such as hair or the colored leftover of bolt of cloth；Second class foreign fiber, its color are light or transparent, and chemical composition is usually poly- third Alkene or polyethylene, such as polypropylene fiber silk etc..
Foreign fiber is easily broken in spinning process, is divided into shorter, thinner fiber, or is broken into the thin of threadiness Small fault.These thin short fibers or fault easily cause gauze to break end, so that reducing production and the processing efficiency of gauze.This Outside, after dyeing of weaving cotton cloth, foreign fiber various colo(u)r streaks or color dot can occur in cloth cover, have a strong impact on the outward appearance and matter of cloth cover Amount, huge economic loss is caused to cotton spinning enterprise.Therefore need to remove foreign fiber from cotton.
At present, for the foreign fiber in cotton, two kinds of reset modes mainly are used：The artificial mode for removing foreign fiber With the mode using the automatic removing foreign fiber such as machinery equipment.The artificial mode for removing foreign fiber relies on the eyesight of people in cotton Choose foreign fiber in spending, the first kind foreign fiber that the color of color and cotton differs greatly can be effectively obtained removing, but It is difficult all to remove the second class foreign fiber from cotton to be.The mode of the artificial removing foreign fiber wastes very big simultaneously Manpower and time, efficiency it is low.The automatic mode for removing foreign fiber is for different types of foreign fiber using different clear Except mode.For first kind foreign fiber, carried out using CCD (Charge-coupled Device, charge coupled cell) camera Identification, it will identify that the first kind foreign fiber come is removed from cotton in conjunction with other equipment.With first kind foreign fiber phase Than the detection difficulty of the second class foreign fiber is larger, and the required precision to detection means is also higher.Second class foreign fiber is main It is identified using following three kinds of modes：It is identified using line array CCD colour TV camera, is identified using photoelectric sensor And be identified using ultrasonic detection technology, afterwards recycle other equipment will identify that come the second class foreign fiber from Removed in cotton.Wherein, line array CCD colour TV camera collection raw material-pretreatment stream picture first, and aberration point is carried out to the image of collection Analyse to identify the second class foreign fiber in raw material stream.Photoelectric sense technology reacts by the change of photoelectric tube current signal Two class foreign fibers and the aberration of cotton, the processing such as it is amplified, compares to current signal afterwards, identifies the in raw material stream Two class foreign fibers.Ultrasound examination is to keep straight line to advance in the material based on ultrasonic wave, and in the friendship of two kinds of different materials The principle that can be reflected at boundary identifies the second class foreign fiber in raw material stream.
However, because the color of the second class foreign fiber is close with the color of cotton, so it is difficult to difference according to color Second class foreign fiber is distinguished with cotton, therefore, the line array CCD colour TV camera and photoelectricity being identified based on color Sensor, it is unsatisfactory to the recognition effect of the second class foreign fiber.Because the transmission speed of ultrasonic wave does not have that light wave is fast, therefore Identification reflection speed to foreign fiber is relatively slow, when the movement velocity of the second class foreign fiber is very fast, it is more likely that come Not as good as identification, therefore, the effect of ultrasonic detection technology is also not ideal enough.
To sum up, how effectively to identify that the second class foreign fiber in cotton is current urgent problem to be solved.
The content of the invention
The embodiment of the present invention provides a kind of Foreign Fiber Detecting Device and method, and it utilizes thing to be detected and foreign fiber The difference of the absorption of different and/or to specific band the light waves influenceed on the polarization direction of light, detects thing to be detected In whether contain foreign fiber, the technical scheme detected relative to the difference using foreign fiber and thing color to be detected is examined Precision is surveyed to effectively improve, and the embodiment of the present invention is to carry out foreign fiber detection based on light wave, therefore do not moved by thing to be detected The influence of dynamic speed, ensure that the precision of opposite sex detection detection.
First aspect provides a kind of Foreign Fiber Detecting Device, and described device includes：
First prefabricated light source, irradiate thing to be detected for producing the first prefabricated light beam, and using the described first prefabricated light beam； The thing to be detected projects the first reflected light；Wherein described first prefabricated light beam is light beam or the light with predetermined band Beam, the light beam of the predetermined band include the light beam of the characteristic wave bands with foreign fiber and the spy with the thing to be detected Levy the light beam of wave band；
First beam splitter, for first reflected light to be divided into the first beamlet and the second beamlet；It is wherein described Include the predetermined light wave of the first kind and the predetermined light wave of the second class in first beamlet and second beamlet；The first kind is pre- It is that the polarization direction light wave vertical with the polarization direction of the described first prefabricated light beam or wavelength are located at the foreign fiber to determine light wave Characteristic wave bands in light wave；The predetermined light wave of second class is that polarization direction and the polarization direction of the described first prefabricated light beam are put down Capable light wave or wavelength are located at the light wave in the characteristic wave bands of the thing to be detected；
First optical gating elements, for receiving first beamlet, and gate the first kind in first beamlet Predetermined light wave；
Second optical gating elements, for receiving second beamlet, and gate the second class in second beamlet Predetermined light wave；
First detecting element, for receiving the predetermined light wave of the first kind in first beamlet, and formed described to be checked Survey the first image of thing；
Second detecting element, for receiving the predetermined light wave of the second class in second beamlet, and formed described to be checked Survey the second image of thing；
Image processing elements, for judging whether the difference of the gray value of any two pixel in described first image is less than Predetermined value, and judge whether the difference of the gray value of any two pixel in second image is less than the predetermined value, if The difference of the gray value of any two pixel is respectively less than the predetermined value in described first image, and appoints in second image The difference difference of the gray scale for two pixels of anticipating is respectively less than the predetermined value, then does not include foreign fiber in the thing to be detected.
With reference in a first aspect, in the first possible implementation, first optical gating elements be polarization direction with The first vertical polarizer of the polarization direction of the first prefabricated light beam, second optical gating elements be polarization direction with it is described The second parallel polarizer of the polarization direction of first prefabricated light beam.
With reference in a first aspect, in second of possible implementation, first optical gating elements are the first optical filter, Second optical gating elements are the second optical filter；Wherein, the gating wave band of first optical filter is the feature of the foreign fiber Wave band, the gating wave band of second optical filter are the characteristic wave bands of the thing to be detected.
With reference in a first aspect, in the third possible implementation, first optical gating elements include the 3rd polarization Piece and the 3rd optical filter, wherein the polarization direction and the polarization direction of the described first prefabricated light beam of the 3rd polarizer are hung down Directly, the gating wave band of the 3rd optical filter is the characteristic wave bands of the foreign fiber；
Second optical gating elements include the 4th polarizer and the 4th optical filter, wherein the 4th polarizer is inclined Shaking, direction is parallel with the polarization direction of the described first prefabricated light beam, and the gating wave band of the 4th optical filter is the thing to be detected Characteristic wave bands.
With reference to the third possible implementation of first aspect, in the 4th kind of possible implementation, described first Prefabricated light beam is the light beam with the predetermined band ripple；
The predetermined light wave of the first kind is the polarized lightwave that wavelength is located in the characteristic wave bands of the foreign fiber, and institute The polarization direction for stating the predetermined light wave of the first kind is vertical with the polarization direction of the described first prefabricated light beam；
The predetermined light wave of second class is the polarized lightwave that wavelength is located in the characteristic wave bands of the thing to be detected, and institute The polarization direction for stating the predetermined light wave of the second class is parallel with the polarization direction of the described first prefabricated light beam.
With reference in a first aspect, in the 5th kind of possible implementation, described device also includes：
Second prefabricated light source, thing to be detected is irradiated for producing the second prefabricated light beam, and using the described second prefabricated light beam, The thing to be detected projects the second reflected light, wherein the second prefabricated light beam is light beam or polarization with the predetermined band Light beam；
Second beam splitter, for first reflected light to be injected into first beam splitter, described second is reflected Light injects the 3rd beam splitter；
3rd beam splitter, it is divided into the 3rd beamlet for receiving second reflected light, and by second reflected light With the 4th beamlet；
Wherein, make a reservation in the 3rd beamlet and the 4th beamlet including the predetermined light wave of the 3rd class and the 4th class Light wave；The predetermined light wave of 3rd class be the light wave that wavelength is located in the characteristic wave bands of the foreign fiber or polarization direction with The vertical light wave in the polarization direction of the second prefabricated light beam；The predetermined light wave of 4th class is that wavelength is located at the thing to be detected Characteristic wave bands in light wave or the polarization direction light wave parallel with the polarization direction of the described second prefabricated light beam；
3rd optical gating elements, for receiving the 3rd beamlet, and gate the 3rd class in the 3rd beamlet Predetermined light wave；
4th optical gating elements, for receiving the 4th beamlet, and gate the 4th class in the 4th beamlet Predetermined light wave；
3rd detecting element, for receiving the 3rd predetermined light wave of class in the 3rd beamlet, and formed described to be checked Survey the 3rd image of thing；
4th detecting element, for receiving the 4th predetermined light wave of class in the 4th beamlet, and formed described to be checked Survey the 4th image of thing；
Described image treatment element is additionally operable to, and is judged the difference of the gray value of any two pixel in the 3rd image and is It is no to be less than the predetermined value, and judge the difference of the gray value of any two pixel in the 4th image whether less than described Predetermined value, if the difference of the gray value of any two pixel is respectively less than the predetermined value, while described in described first image The difference of the gray value of any two pixel is respectively less than the predetermined value, while any two in the 3rd image in two images The difference of the gray value of pixel is respectively less than the predetermined value, at the same in the 4th image gray value of any two pixel difference Value is respectively less than the predetermined value, then does not include foreign fiber in the thing to be detected.
With reference to the 5th kind of possible implementation of first aspect, in the 6th kind of possible implementation, described first Prefabricated light beam is visible ray light beam or the infrared beam with the predetermined band；
The second prefabricated light beam is infrared beam or visible ray light beam with the predetermined band.
With reference to the 6th kind of possible implementation of first aspect, in the 7th kind of possible implementation, described second Beam splitter is long wave reduction of fractions to a common denominator light microscopic or short-pass spectroscope.
With reference to the 7th kind of possible implementation of first aspect, in the 8th kind of possible implementation, described first Beam splitter partly returns formula spectroscope to be semi-transparent；3rd beam splitter partly returns formula spectroscope to be semi-transparent.
With reference to first aspect, second of possible implementation of first aspect, the third possible reality of first aspect Existing mode, the 5th kind of possible implementation of the 4th kind of possible implementation or first aspect of first aspect, the 9th In the possible implementation of kind, described device also includes light collection device, for collecting first reflected light and/or second Reflected light, and the light of collection is injected into first beam splitter or the second beam splitter.
Second aspect, there is provided a kind of foreign fiber detection method, methods described comprise the following steps：
The first prefabricated light beam is formed, and thing to be detected is irradiated using the described first prefabricated light beam；The thing to be detected projects First reflected light；Wherein described first prefabricated light beam be light beam or with predetermined band light beam, the predetermined band bag Include the characteristic wave bands of foreign fiber and the characteristic wave bands of the thing to be detected；
First reflected light is divided into the first beamlet and the second beamlet；Wherein described first beamlet and the second son Include the predetermined light wave of the first kind and the predetermined light wave of the second class in light beam；The predetermined light wave of the first kind be polarization direction with it is described The vertical light wave in the polarization direction of first prefabricated light beam or wavelength are located at the light wave in the characteristic wave bands of the foreign fiber；Institute It is that the polarization direction light wave parallel with the polarization direction of the described first prefabricated light beam or wavelength are located to state the predetermined light wave of the second class Light wave in the characteristic wave bands of the thing to be detected；
The predetermined light wave of the first kind in first beamlet is chosen, and it is pre- using the first kind in first beamlet Determine the first image that light wave forms the thing to be detected；
The predetermined light wave of the second class in second beamlet is chosen, and it is pre- using the second class in second beamlet Determine the second image that light wave forms the thing to be detected；
Judge whether the difference of the gray value of any two pixel in described first image is less than predetermined value, and judge institute Whether the difference for stating the gray value of any two pixel in the second image is less than the predetermined value, if any in described first image The difference of the gray value of two pixels is respectively less than the predetermined value, and in second image any two pixel gray value Difference be respectively less than the predetermined value, then do not include foreign fiber in the thing to be detected.
With reference to second aspect, in the first possible implementation, methods described also comprises the following steps：
The second prefabricated light beam is formed, and thing to be detected is irradiated using the described second prefabricated light beam, the thing to be detected projects Second reflected light, wherein the second prefabricated light beam is light beam or light beam with the predetermined band；
Second reflected light is divided into the 3rd beamlet and the 4th beamlet；Wherein, the 3rd beamlet and the 4th Include the predetermined light wave of the 3rd class and the 4th predetermined light wave of class in beamlet；The predetermined light wave of 3rd class is wavelength positioned at described Light wave or polarization direction in the characteristic wave bands of the foreign fiber light wave vertical with the polarization direction of the described second prefabricated light beam； The predetermined light wave of 4th class be the light wave that wavelength is located in the characteristic wave bands of the thing to be detected or polarization direction with it is described The parallel light wave in the polarization direction of second prefabricated light beam；
The 3rd predetermined light wave of class in the 3rd beamlet is chosen, and it is pre- using the 3rd class in the 3rd beamlet Determine the 3rd image that light wave forms the thing to be detected；
The 4th predetermined light wave of class in the 4th beamlet is chosen, and it is pre- using the 4th class in the 4th beamlet Determine the 4th image that light wave forms the thing to be detected；
Judge whether the difference of the gray value of any two pixel in the 3rd image is less than the predetermined value, and sentence Whether the difference of the gray value of any two pixel is less than the predetermined value in disconnected 4th image, if in described first image The difference of the gray value of any two pixel is respectively less than the predetermined value, at the same in second image any two pixel ash The difference of angle value is respectively less than the predetermined value, while the difference of the gray value of any two pixel is respectively less than in the 3rd image The predetermined value, while the difference of the gray value of any two pixel is respectively less than the predetermined value in the 4th image, then institute Stating does not include foreign fiber in thing to be detected.
In the above-mentioned technical proposal of the embodiment of the present invention, the polarization direction using thing to be detected with foreign fiber to light Whether the difference of the absorption of different and/or to specific band the light waves of influence detects fine containing the opposite sex in thing to be detected Dimension, the technical scheme accuracy of detection detected relative to the difference using foreign fiber and thing color to be detected are effectively carried Height, and the embodiment of the present invention is to carry out foreign fiber detection based on light wave, therefore do not influenceed by thing translational speed to be detected, Ensure that the precision of opposite sex detection detection.The detection to foreign fiber of the other embodiment of the present invention be by beam splitter with And the device such as optical gating elements is automatically performed, detection efficiency is effectively improved.
Brief description of the drawings
, below will be in embodiment or description of the prior art for the technical scheme of the clearer explanation embodiment of the present invention The required accompanying drawing used is briefly described, it should be apparent that, drawings in the following description are only some realities of the present invention Example is applied, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to these accompanying drawings Obtain other accompanying drawings.
Fig. 1 schematically illustrates the block diagram of Foreign Fiber Detecting Device according to an embodiment of the invention.
Fig. 2 schematically illustrates the block diagram of Foreign Fiber Detecting Device according to another embodiment of the present invention.
Fig. 3 schematically illustrates the block diagram of the Foreign Fiber Detecting Device according to further embodiment of this invention.
Fig. 4 schematically illustrates the block diagram of the Foreign Fiber Detecting Device according to further embodiment of this invention.
Fig. 5 schematically illustrates the block diagram of the Foreign Fiber Detecting Device according to further embodiment of this invention.
Fig. 6 schematically illustrates the flow chart of foreign fiber detection method according to an embodiment of the invention.
Fig. 7 is to schematically illustrate the first image in foreign fiber detection according to an embodiment of the invention.
Fig. 8 is to schematically illustrate the second image in foreign fiber detection according to an embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Site preparation describes, it is clear that described embodiment is the part of the embodiment of the present invention, rather than whole embodiments.Based on this Embodiment in invention, the every other reality that those of ordinary skill in the art are obtained under the premise of creative work is not made Example is applied, belongs to the scope of protection of the invention.
First it should be noted that following " uniform ", refers to the difference of the gray value of pixel in image in predetermined model In enclosing, i.e., the difference of gray value is less than predetermined value, and the gray value for the absolute each pixel not implied that is equal.
In one embodiment, a kind of Foreign Fiber Detecting Device includes the first prefabricated light source, the first beam splitter, the first light Gating element, the second optical gating elements, the first detecting element, the second detecting element, image processing elements.
First prefabricated light source, irradiate thing to be detected for producing the first prefabricated light beam, and using the first prefabricated light beam；It is to be checked Survey thing and project the first reflected light；Wherein first prefabricated light beam be light beam or with predetermined band light beam, predetermined band Light beam includes the light beam of the light beam of the characteristic wave bands with foreign fiber and the characteristic wave bands with thing to be detected.
It should be noted that thing to be detected can change the polarization direction of polarised light, the polarised light after thing to be detected reflection It is changed into natural light, foreign fiber is specular surface, does not change the polarization direction of incident ray, the polarization after foreign fiber reflects The polarization direction of light is constant.So if it is light beam to be irradiated to the first prefabricated light beam on thing to be detected, then through to be detected The light of thing reflection is natural light, and the light reflected through foreign fiber is still polarised light.Thing and foreign fiber to be detected are right respectively The light wave of its characteristic wave bands has obvious absorption, relatively very weak to the absorption of the light of its all band.Therefore such as The first prefabricated light beam of fruit is the light beam with above-mentioned predetermined band, then thing to be detected can be significantly absorbed in the first prefabricated light beam Thing characteristic wave bands to be detected light wave, and reflect the light wave of its all band, it is prefabricated that foreign fiber can significantly absorb first The light wave of foreign fiber characteristic wave bands in light beam, and reflect the light wave of its all band.
First beam splitter, for the first reflected light to be divided into the first beamlet and the second beamlet；Wherein the first sub-light Include the predetermined light wave of the first kind and the predetermined light wave of the second class in beam and the second beamlet；The predetermined light wave of the first kind is polarization direction The light wave vertical with the polarization direction of the first prefabricated light beam or wavelength are located at the light wave in the characteristic wave bands of foreign fiber；Second class Predetermined light wave is the spy that the polarization direction light wave parallel with the polarization direction of the first prefabricated light beam or wavelength are located at thing to be detected Levy the light wave in wave band.
It should be noted that when the first prefabricated light beam is polarised light, the predetermined light wave of the first kind is polarization direction and first The vertical light wave in the polarization direction of prefabricated light beam, the predetermined light wave of the second class is the polarization direction of polarization direction and the first prefabricated light beam Parallel light wave.When the first prefabricated light beam is the light beam with above-mentioned predetermined band, the predetermined light wave of the first kind is that wavelength is located at Light wave in the characteristic wave bands of foreign fiber；The predetermined light wave of second class is the light that wavelength is located in the characteristic wave bands of thing to be detected Ripple.
First optical gating elements, for receiving the first beamlet, and gate the predetermined light wave of the first kind in the first beamlet；
It should be noted that when the first prefabricated light beam is polarised light, the predetermined light wave of the first kind is polarization direction and first The vertical light wave in the polarization direction of prefabricated light beam, this part light wave are the parts in the natural light of thing reflection to be detected, and different The polarization direction of property fiber reflecting light is parallel with the polarization direction of the first prefabricated light beam, it is impossible to passes through the optical gating elements.Cause The light wave of this first optical gating elements gating is a part for the light wave of thing reflection to be detected.
When the first prefabricated light beam is the light beam with above-mentioned predetermined band, the predetermined light wave of the first kind of gating is wavelength position Light wave in the characteristic wave bands of foreign fiber, this part light wave had both included the predetermined light wave of the first kind of thing to be detected reflection, Include the predetermined light wave of the first kind of foreign fiber reflection, difference is thing to be detected due to will not substantially absorb the predetermined light of the first kind Ripple, therefore the intensity of the predetermined light wave of the first kind reflected is big, and foreign fiber absorbs the predetermined light wave of the first kind due to obvious, therefore The predetermined light wave intensity of the first kind of reflection relatively it is weak a lot.
Second optical gating elements, for receiving the second beamlet, and gate the predetermined light wave of the second class in the second beamlet；
It should be noted that when the first prefabricated light beam is polarised light, the predetermined light wave of the second class is polarization direction and first The parallel light wave in the polarization direction of prefabricated light beam, this part light wave include a part in the natural light of thing to be detected reflection and The light of foreign fiber reflection, it is the part light for having gated thing reflection to be detected that the second optical gating elements, which gate this part light wave, Ripple and the light wave of foreign fiber reflection.
When the first prefabricated light beam is the light beam with above-mentioned predetermined band, the predetermined light wave of the second class of gating is wavelength position Light wave in the characteristic wave bands of thing to be detected, this part light wave had both included the predetermined light wave of the second class of thing to be detected reflection, Include the predetermined light wave of the second class of foreign fiber reflection, difference is foreign fiber due to will not substantially absorb the predetermined light of the second class Ripple, therefore the intensity of the predetermined light wave of the second class reflected is big, and thing to be detected absorbs the predetermined light wave of the second class due to obvious, therefore Reflection the predetermined light wave intensity of the second class relatively it is weak a lot.
First detecting element, for receiving the predetermined light wave of the first kind in the first beamlet, and form the of thing to be detected One image；
It should be noted that when the first prefabricated light beam is polarised light, the predetermined light wave of the first kind is thing reflection to be detected A part in natural light, therefore the first image of the first detecting element formation is the image of thing to be detected, foreign fiber reflects Light in principle can not (not being can not be by being few pass through) by the first optical gating elements, therefore the opposite sex can not be formed The image of fiber.But in practice, the polarised light of foreign fiber reflection, although vertical with the polarization direction of the first detecting element, But the optical gating elements of very small part light-transmissive first are still might have, detected afterwards by the first detecting element, because The image of foreign fiber may be formed in this first image, but the gray value of its pixel is very low.
When the first prefabricated light beam is the light beam with above-mentioned predetermined band, the predetermined light wave of the first kind of gating is wavelength position Light wave in the characteristic wave bands of foreign fiber, but because thing to be detected will not substantially absorb the predetermined light wave of the first kind, the opposite sex Fiber can substantially absorb the predetermined light wave of the first kind, therefore the gray scale of foreign fiber image can be significantly less than in the first image formed The gray scale of object image to be detected.
Second detecting element, for receiving the predetermined light wave of the second class in the second beamlet, and form the of thing to be detected Two images；
It should be noted that when the first prefabricated light beam is polarised light, the predetermined light wave of the second class reflects including thing to be detected Natural light in a part and foreign fiber reflection light, therefore the second image formed includes the figure of examined object The image of picture and foreign fiber, and the gray value that the gray value of foreign fiber compares in the first image is much higher.
When the first prefabricated light beam is the light beam with above-mentioned predetermined band, the predetermined light wave of the second class of gating is wavelength position Light wave in the characteristic wave bands of thing to be detected, but foreign fiber will not substantially absorb the predetermined light wave of the second class, and it is to be detected Thing can substantially absorb the predetermined light wave of the second class, therefore the gray scale of foreign fiber image can be treated significantly greater than in the second image formed Detect the gray scale of object image.
In summary, when the first prefabricated light beam is to include foreign fiber in polarised light and thing to be detected, the first image It is the image of thing to be detected, the first image does not include the image of foreign fiber in principle, but in practice may in the first image The image of foreign fiber is shown, but the gray value of foreign fiber image is very low as shown in Figure 7.Second image includes thing to be detected The image of body and the image of foreign fiber, the gray value of foreign fiber image is much higher with respect to the first image, as shown in figure 8, The gray value of object image to be detected approaches on two images.The gray scale of first image can regard uniform as to a certain extent , the gray scale of the second image is uneven.
When the first prefabricated light beam is not include foreign fiber in polarised light and thing to be detected, the first image is to be detected The image of thing, the second image are also the image of thing to be detected, and the uniform gray level and gray scale of two images are equal.
When the first prefabricated light beam is to include foreign fiber in the light beam with above-mentioned predetermined band and thing to be detected, the The gray scale of foreign fiber image can be significantly less than the gray scale of object image to be detected in one image, foreign fiber image in the second image Gray scale can be significantly greater than the gray scale of object image to be detected.The gray scale of two images is all uneven.
When the first prefabricated light beam is not include foreign fiber in the light beam with above-mentioned predetermined band and thing to be detected, There was only the image of thing to be checked in first image, the image for also there was only thing to be detected in the second image, the gray scale of two images is all Uniformly.
When the first prefabricated light beam is to include foreign fiber in the light beam with predetermined band ripple and thing to be detected, The predetermined light wave of the first kind through the first optical gating elements is that wavelength is located in the characteristic wave bands of foreign fiber, and polarization direction The light wave vertical with the polarization direction of the first prefabricated light beam, the light wave of foreign fiber reflection is seldom by what can not be passed through or pass through, Mostly the light wave in the characteristic wave bands of foreign fiber of thing to be detected reflection can by the first optical gating elements, because The first image that this first detecting element is formed only has the image of thing to be detected, or even if the first image includes foreign fiber Image, the gray value of its pixel is also at a fairly low.The predetermined light wave of the second class through the second optical gating elements is wavelength positioned at treating In the characteristic wave bands of detectable substance, and the light wave that polarization direction is parallel with the polarization direction of the first prefabricated light beam, therefore it is to be detected The part light wave and foreign fiber of thing reflection can pass through for the light wave of reflection, therefore the second image that the second detecting element is formed The image of image and foreign fiber including thing to be detected.To sum up the first image is can to regard uniform as to a certain extent , the second image is uneven.
When first prefabricated light beam is does not include foreign fiber in the light beam with predetermined band ripple and thing to be detected, The predetermined light wave of the first kind through the first optical gating elements is that wavelength is located in the characteristic wave bands of foreign fiber, and polarization direction The light wave vertical with the polarization direction of the first prefabricated light beam, therefore the characteristic wave bands positioned at foreign fiber of thing to be detected reflection It is interior, and the polarization direction light wave vertical with the polarization direction of the first prefabricated light beam can by the first optical gating elements, therefore The first image that one detecting element is formed only has the image of thing to be detected, and the gray value of the first image is uniform.Through second The predetermined light wave of the second class of optical gating elements is that wavelength is located in the characteristic wave bands of thing to be detected, and polarization direction and first pre- The parallel light wave in the polarization direction of light beam processed, thus thing to be detected reflection in the characteristic wave bands of thing to be detected, and partially The direction light wave parallel with the polarization direction of the first prefabricated light beam that shake can pass through, therefore the second image that the second detecting element is formed The image of thing only to be detected, and the gray value of the second image is uniform.
It can be seen that when including foreign fiber in thing to be detected, at least one is in obtained the first image and the second image Gray scale is uneven, i.e., the gray value of two kinds of objects (thing and foreign fiber to be detected) has significant difference in image, when the first figure When the gray scale of picture and the second image is all uniform, i.e., the difference of gray value within the specific limits, shows in thing to be detected not in image Contain foreign fiber.
Certainly can also be with specific reference to two kinds of objects (thing and foreign fiber to be detected) in the first image and the second image The concrete condition of gray value judges whether to include foreign fiber in thing to be detected, specifically：When the first prefabricated light beam is inclined Shake light beam when, the gray value of thing to be detected and is treated apparently higher than the gray value of foreign fiber in the second image in the first image The gray value of detectable substance is close with the gray value of thing to be detected in the first image, but the gray value of foreign fiber is apparently higher than In one image during the gray value of foreign fiber, it is possible to determine that foreign fiber is included in thing to be detected.When the first prefabricated light beam is pre- During standing wave Duan Bo light beam, the image of thing and foreign fiber to be detected is each formed with the first image and the second image, Unlike in the first image the gray value of object image to be detected be significantly greater than the gray value of foreign fiber image, in the second image The gray value of object image to be detected is significantly less than the gray value of foreign fiber, such a situation, it is possible to determine that is included in thing to be detected Foreign fiber.
Image processing elements are to be judged according to the difference of the gray value of pixel in each image in examined object below Whether foreign fiber is contained, and certainly, image processing elements can also be with specific reference to two kinds of objects in the first image and the second image The concrete condition of the gray value of (thing and foreign fiber to be detected) judges whether include foreign fiber in thing to be detected.
Image processing elements are exactly to judge whether contain foreign fiber in examined object according to the gray value of image, specifically Ground：Judge whether the difference of the gray value of any two pixel in the first image is less than predetermined value, and judge in the second image Whether the difference of the gray value of any two pixel is less than predetermined value, if in the first image the gray value of any two pixel difference Value is respectively less than predetermined value, and the difference difference of the gray scale of any two pixel is respectively less than predetermined value in the second image, then to be detected Do not include foreign fiber in thing.Wherein predetermined value can flexibly be set according to actual scene, and the embodiment of the present invention is not entered to this Row limits.
Certainly, image processing elements can also be with specific reference to two kinds of object (things to be detected in the first image and the second image And foreign fiber) the concrete condition of gray value judge whether to include foreign fiber in thing to be detected.Specifically, at image Manage element to be used for when the first prefabricated light beam is light beam, judge whether following condition meets：Thing to be detected in first image Gray value apparently higher than foreign fiber gray value, and in the second image the gray value of thing to be detected with being treated in the first image The gray value of detectable substance is close, but the gray value of foreign fiber is apparently higher than the gray value of foreign fiber in the first image, if Meet condition then, judge to include foreign fiber in thing to be detected；When the first prefabricated light beam is the light beam of predetermined band ripple, Judge whether following condition meets：The image of thing and foreign fiber to be detected is each formed with first image and the second image, The gray value of object image to be detected is significantly greater than the gray value of foreign fiber image in first image, thing to be detected in the second image The gray value of image is significantly less than the gray value of foreign fiber, if condition is met, it is possible to determine that the opposite sex is included in thing to be detected Fiber.
The present embodiment utilizes thing to be detected different from polarization direction influence of the foreign fiber on light or to specific band The difference of absorption of light wave detect in thing to be detected whether contain foreign fiber, relative to using foreign fiber with it is to be checked The technical scheme accuracy of detection that the difference of survey thing color is detected effectively improves, and the embodiment of the present invention is to be based on light Ripple carries out foreign fiber detection, therefore is not influenceed by thing translational speed to be detected, ensures that the essence of opposite sex detection detection Degree.The detection to foreign fiber of the other embodiment of the present invention is automatically performed by devices such as beam splitter and optical gating elements , detection efficiency is effectively improved.
In one embodiment, as shown in figure 1, the present embodiment illustrates so that thing 12 to be detected is cotton as an example.First Prefabricated light beam 11 is polarised light, and the first optical gating elements 16 are the vertical with the polarization direction of the first prefabricated light beam of polarization direction One polarizer, the second optical gating elements 17 are polarization direction second polarizer parallel with the polarization direction of the first prefabricated light beam. First detecting element 18 and the second detecting element 19 are photodetector or camera.In the present embodiment, Foreign Fiber Detecting Device Also include light collection device 14, light collection device 14 is located on the output light path of the reflected light of thing 12 to be detected, is converged for collecting The first reflected light that poly- thing 12 to be detected reflects, and the first reflected light is injected into the first beam splitter 15.Light collection device 14 can To select lens or camera lens.First beam splitter 15 can partly return spectroscope, half light-transmissive, second half luminous energy from semi-transparent Reflection, so can just be protected according to the difference of the first image and the gray value of the second image to detect the accuracy of foreign fiber Card.
The present embodiment is detected based on the differential responses to polarised light of cotton and foreign fiber, polarizing light irradiation to cotton and On the mixture of foreign fiber, polarised light is changed into non-polarized light after cotton is reflected, that is, makees natural light, and foreign fiber has Specular surface, polarised light are still polarised light after foreign fiber reflects.The Cleaning Principle of the present embodiment is：Polarised light (i.e. One prefabricated light beam 11) it is irradiated on thing 12 to be detected, and luminous energy is collected by lens (i.e. light collection device 14), then by spectroscope (i.e. the first beam splitter 15) is divided, two photodetectors (the first detecting element 18 and the second detecting element 19) while to this Thing 12 to be detected is imaged, and installs the first polarizer (i.e. the first optical gating elements 16), the polarizer additional on the first detecting element 18 Thoroughly shake direction and the direction of vibration of light source polarised light it is orthogonal, install the second polarizer additional (i.e. on the second detecting element 19 Second optical gating elements 17), the polarizer thoroughly shake direction and the direction of vibration of light source polarised light it is parallel to each other.Because cotton is anti- The light penetrated is natural light, so the light of cotton reflection arrives separately at the first detecting element 18 and the second detection by two polarizers On element 19, and the first detecting element 18 and the glazing energy coincidence of the second detecting element 19 are reached, i.e., cotton is in two detections Gray value on element is consistent.The light that foreign fiber 13 reflects is polarised light, can not be by when polarised light passes through the first polarizer, Or only a small amount of light is by so the gray value of the imaging on the first detecting element 18 of foreign fiber 13 is small, and polarizing Light can be by when passing through the second polarizer, so the light that foreign fiber 13 reflects reaches the second detecting element light energy more, institute It is big with the gray value of the imaging on the second detector element 19 of foreign fiber 13.To sum up, cotton is on two detecting elements Gray value it is close, and gray value of the foreign fiber 13 on two detecting elements be bound to difference it is very big, by comparing two spies Cotton and foreign fiber can be distinguished by surveying the gray value of element.
In one embodiment, as shown in Fig. 2 the present embodiment illustrates so that thing 22 to be detected is cotton as an example.First Prefabricated light beam 21 is the light beam with above-mentioned predetermined band, and the first optical gating elements 26 are the first optical filter, and the second light gating is first Part 27 is the second optical filter；Wherein, the first optical filter gating wave band be foreign fiber characteristic wave bands, the choosing of the second optical filter Logical wave band is the characteristic wave bands of thing to be detected.First detecting element 28 and the second detecting element 29 are photodetector or camera. In the present embodiment, Foreign Fiber Detecting Device also includes light collection device 24, and light collection device 24 is located at the anti-of thing 22 to be detected Penetrate on the output light path of light.Light collection device 24 can select lens or camera lens.First beam splitter 25 can select semi-transparent half Return spectroscope.
The present embodiment is the absorbing state to the light wave of specific band in the first prefabricated light beam based on cotton and foreign fiber Come what is detected.When the frequency for the incident light being radiated on chemical combination surface is consistent with the vibration frequency of a certain group of chemical combination, Incident light significantly can be absorbed by respective compound.By the length scanning in full spectral region, sign chemical combination can be obtained The characteristic wave bands of thing absorption characteristic, you can to obtain the feature of cotton and foreign fiber by the length scanning in full spectral region Wave band.Cotton and foreign fiber characteristic wave bands are learnt typically near infrared band by the length scanning in full spectral region, because It is feasible that this carries out detection to cotton and foreign fiber using the characteristic wave bands of near-infrared, i.e., the first prefabricated light beam is using near red The light wave of outer characteristic wave bands.When the include cotton characteristic wave bands and foreign fiber characteristic wave bands first prefabricated light beam 21 irradiates On the surface of thing 22 to be detected, the light wave of the characteristic wave bands of cotton and foreign fiber included in the first prefabricated light beam 21 will Significantly absorbed by cotton and foreign fiber respectively, remaining first prefabricated light beam 21 enters after thing 22 to be detected reflection Lens (i.e. light collection device 24), then be divided by spectroscope (the first beam splitter 25), the spectroscope is preferably semi-transparent semi-reflecting lens, Light after light splitting reaches the first detecting element 28 and the second detecting element 29 after the optical filtering of corresponding optical filter again.It is if to be detected Doped with foreign fiber 23 in thing 22, then foreign fiber 23 will absorb the light wave of characteristic wave bands corresponding with itself, without absorption Or the light wave of the less characteristic wave bands for absorbing cotton, therefore, foreign fiber gray value phase on the image of the first detecting element 28 It is low for the gray value of Cotton Images, and the cotton gray scale of gray value with respect to foreign fiber on the image of the second detecting element 29 It is worth the gray scale balance of power of the image low, the first detecting element 28 of contrast and the second detecting element 29 are formed, cotton and foreign fiber There must be difference, whether there is foreign fiber so as to be detected by above gray scale difference in cotton.
In one embodiment, as shown in figure 3, the present embodiment illustrates so that thing 32 to be detected is cotton as an example.First Prefabricated light beam 31 is the light beam with predetermined band ripple, such as can be infrared polarization light beam, the first optical gating elements 36 Including the 3rd polarizer 361 and the 3rd optical filter 362, wherein the polarization direction of the 3rd polarizer 361 and the first prefabricated light beam 31 polarization direction is vertical, and the gating wave band of the 3rd optical filter 362 is the characteristic wave bands of foreign fiber；Second optical gating elements 37 Including the 4th polarizer 371 and the 4th optical filter 372, wherein the polarization direction of the 4th polarizer 371 and the first prefabricated light beam 31 polarization direction is parallel, and the gating wave band of the 4th optical filter 372 is the characteristic wave bands of thing 32 to be detected.Now the first kind makes a reservation for Light wave is the polarized lightwave that wavelength is located in the characteristic wave bands of foreign fiber, and the polarization direction of the predetermined light wave of the first kind and the The polarization direction of one prefabricated light beam 31 is vertical；The predetermined light wave of second class is the polarization that wavelength is located in the characteristic wave bands of thing to be detected Light wave, and the polarization direction of the predetermined light wave of the second class is parallel with the polarization direction of the first prefabricated light beam.In the present embodiment, first The detecting element 39 of detecting element 38 and second is photodetector or camera.Foreign Fiber Detecting Device also includes light collection device 34, light collection device 34 is located on the output light path of the reflected light of thing 32 to be detected, is reflected for collecting convergence thing 32 to be detected The first reflected light, and by the first reflected light inject the first beam splitter 35.Light collection device 34 can select lens or camera lens, First beam splitter 35 can partly return spectroscope from semi-transparent.It should be noted that the first optical gating elements 36 include the 3rd The order of the optical filter 362 of polarizer 361 and the 3rd can be converted arbitrarily, the 4th polarizer that the second optical gating elements 37 include 371 and the 4th the order of optical filter 372 can arbitrarily convert.
Cotton has an obvious absworption peak in 1525nm, and foreign fiber has an obvious absworption peak in 1730nm, i.e. 1525nm and 1730nm is the characteristic wave bands of cotton and foreign fiber respectively, and absorption peak of the foreign fiber in 1730nm exists than cotton 1525nm absorption peak is big.Centre wavelength 1525nm narrow band pass filter is as the 4th optical filter 372, centre wavelength 1730nm Narrow band pass filter can be used as the 3rd optical filter 362.When the polarized infrared light (i.e. first containing 1525nm and 1730nm wave bands Prefabricated light beam 31) it is irradiated on the mixture of cotton and the opposite sex, polarised light is changed into non-polarized light, polarised light quilt after being reflected by cotton Still it is polarised light after foreign fiber reflection, these light are collected by lens (i.e. light collection device 34), and pass through spectroscope (i.e. first Beam splitter 35) light splitting.One semi-gloss of transmission passes through the 3rd polarizer 361, and the direction and first that shakes thoroughly of the 3rd polarizer 361 The polarization direction of prefabricated light beam 31 is orthogonal；Another semi-gloss reflected passes through the 4th polarizer 371, and the 4th polarizer 371 thoroughly shake direction and the polarization direction of the first prefabricated light beam 31 it is parallel to each other.When foreign fiber is included in cotton, the first image Only the image of cotton or colleague include the image of foreign fiber, but the gray value of foreign fiber image is at a fairly low, the second figure As including the image of cotton and the image of foreign fiber.First image can regard uniform as to a certain extent, and second Image is uneven, can be judged according to the difference of the first image and the gray value of the second image in cotton with the presence or absence of different Property fiber 33.
Certain the present embodiment can also judge according to two kinds of specific gray values of object in the first image and the second image Whether foreign fiber is contained in examined object, specifically, image processing elements are additionally operable to judge whether following condition meets, the The equal image comprising examined object and foreign fiber in one image and the second image, object image to be detected in the first image Gray scale apparently higher than the gray scale of foreign fiber image, and the second image foreign fiber image gray scale is apparently higher than thing to be detected The gray value of image, if meeting condition, it can be determined that and contain foreign fiber in examined object.
The present embodiment is that solve the light or transparent opposite sex jointly based on two kinds of technological means of Polarization Detection and infrared detection The problem of fiber check and measure difficulty.The characteristic wave bands of cotton and foreign fiber are designed as polarised light, the i.e. polarization with predetermined band Light beam, and optical filter and polarizer are applied in combination to realize the detection of foreign fiber.Special instruction, cotton and the opposite sex are fine The optical filter of the larger wave band of degree of absorption in the characteristic wave bands of dimension will be with direction and the vibration side of the first prefabricated light beam of shaking thoroughly It is applied in combination to vertical polarizer, inclined parallel with the direction of vibration of the first prefabricated light beam with the direction that shakes thoroughly of another optical filter The piece that shakes is applied in combination, and the method can amplify the difference of cotton and foreign fiber.
In one embodiment, Foreign Fiber Detecting Device also includes：
Second prefabricated light source, thing to be detected is irradiated for producing the second prefabricated light beam, and using the second prefabricated light beam, it is to be checked Survey thing and project the second reflected light, wherein the second prefabricated light beam is light beam or light beam with predetermined band；
It should be noted that when the first prefabricated light beam is light beam, the second prefabricated light beam is with predetermined band Light beam, the first prefabricated light beam for light beam with predetermined band when, the second prefabricated light beam is light beam.
Second beam splitter, for the first reflected light to be injected into the first beam splitter, the second reflected light is injected the 3rd point Optical element；
3rd beam splitter, it is divided into the 3rd beamlet and the 4th son for receiving the second reflected light, and by the second reflected light Light beam；
Wherein, the predetermined light wave of the 3rd class and the 4th predetermined light wave of class are included in the 3rd beamlet and the 4th beamlet；The The predetermined light wave of three classes is the light wave that wavelength is located in the characteristic wave bands of foreign fiber or polarization direction and the second prefabricated light beam The vertical light wave in polarization direction；The 4th predetermined light wave of class is the light wave or polarization that wavelength is located in the characteristic wave bands of thing to be detected The direction light wave parallel with the polarization direction of the second prefabricated light beam；
It should be noted that the predetermined light wave of the first kind is the polarization direction of polarization direction and the described first prefabricated light beam During vertical light wave, the predetermined light wave of the second class is the polarization direction light wave parallel with the polarization direction of the described first prefabricated light beam, The 3rd predetermined light wave of class is the light wave that wavelength is located in the characteristic wave bands of foreign fiber, and the 4th predetermined light wave of class is wavelength positioned at treating Light wave in the characteristic wave bands of detectable substance.Now pass through the second beam splitter, the first reflected light is injected into the first beam splitter, will Second reflected light injects the 3rd beam splitter；First beam splitter is injected light wave and made a reservation for including the predetermined light wave of the first kind and the second class Light wave, the second beam splitter, which injects light wave, includes the predetermined light wave of the 3rd class and the 4th predetermined light wave of class, that is, injects the first light splitting member The light of part carries out foreign fiber detection based on the differential responses to polarised light of thing to be detected and foreign fiber, injects the 3rd light splitting The light of element carries out foreign fiber detection based on thing to be detected and foreign fiber to the absorbing state of the light wave of specific band, tool The same above embodiment of body detection process, the embodiment of the present invention are no longer repeated identical content.
When the predetermined light wave of the first kind is the light wave that wavelength is located in the characteristic wave bands of foreign fiber；The predetermined light wave of second class is Wavelength is located at the light wave in the characteristic wave bands of the thing to be detected, and the 3rd predetermined light wave of class is polarization direction and the second prefabricated light beam The vertical light wave in polarization direction, the 4th predetermined light wave of class is the polarization direction light parallel with the polarization direction of the second prefabricated light beam Ripple.Now pass through the second beam splitter, the first reflected light is injected into the first beam splitter, the second reflected light is injected into the 3rd light splitting Element；First beam splitter, which injects light wave, includes the predetermined light wave of the first kind and the predetermined light wave of the second class, and the second beam splitter is injected Light wave includes the predetermined light wave of the 3rd class and the 4th predetermined light wave of class, that is, the light for injecting the first beam splitter is based on thing to be detected and different Property fiber foreign fiber detection carried out to the absorbing state of the light wave of specific band, the light for injecting the 3rd beam splitter is based on treating The differential responses of detectable substance and foreign fiber to polarised light carry out foreign fiber detection, and specific detection process is the same as implementation above Example, the embodiment of the present invention are no longer repeated identical content.
3rd optical gating elements, for receiving the 3rd beamlet, and gate the 3rd predetermined light wave of class in the 3rd beamlet；
4th optical gating elements, for receiving the 4th beamlet, and gate the 4th predetermined light wave of class in the 4th beamlet；
It should be noted that when the 3rd predetermined light wave of class is the light wave that wavelength is located in the characteristic wave bands of foreign fiber, the The predetermined light wave of four classes is the light wave that wavelength is located in the characteristic wave bands of thing to be detected；Now combine the 3rd following detecting element, 3rd detecting element and image processing elements are carried out based on the absorption of thing to be detected and foreign fiber to the light wave of specific band Situation carries out foreign fiber detection, the specific same above embodiment of detection process, the embodiment of the present invention to identical content not Repeated again..
When the 3rd predetermined light wave of class is the polarization direction light wave vertical with the polarization direction of the second prefabricated light beam, the 4th class is pre- It is the polarization direction light wave parallel with the polarization direction of the second prefabricated light beam to determine light wave, now combines the 3rd following detection member Part, the 3rd detecting element and image processing elements carry out based on the differential responses to polarised light of thing to be detected and foreign fiber come Detection, the specific same above embodiment of detection process, the embodiment of the present invention are no longer repeated identical content.
3rd detecting element, for receiving the 3rd predetermined light wave of class in the 3rd beamlet, and form the of thing to be detected Three images；
4th detecting element, for receiving the 4th predetermined light wave of class in the 4th beamlet, and form the of thing to be detected Four images；
Image processing elements are additionally operable to, and judge whether the difference of the gray value of any two pixel in the 3rd image is less than in advance Definite value, and judge whether the difference of the gray value of any two pixel in the 4th image is less than predetermined value, if in the first image The difference of the gray value of any two pixel is respectively less than predetermined value, at the same in the second image the gray value of any two pixel difference Value is respectively less than predetermined value, while the difference of the gray value of any two pixel is respectively less than predetermined value, while the 4th in the 3rd image The difference of the gray value of any two pixel is respectively less than predetermined value in image, then does not include foreign fiber in thing to be detected.
Certainly, the image processing elements Chinese can judge to treat with specific reference to the specific gray value situation of two kinds of objects in image Whether contain foreign fiber in detection object.
The present embodiment will detect the skill of foreign fiber based on the differential responses to polarised light of thing to be detected and foreign fiber Art scheme with detecting the skill of foreign fiber to the absorbing state of the light wave of specific band based on thing to be detected and foreign fiber Art scheme is overlapped combination, and the accuracy of foreign fiber detection can be improved through a step.
In one embodiment, as shown in figure 4, prefabricated light beam 41 includes the first prefabricated 411 and second prefabricated light beam of light beam 412, the first prefabricated light beam 411 is visible polarized light beam, and the second prefabricated light beam 412 is the infrared beam with predetermined band.When The illumination for being mixed with infrared light and visible polarized light is mapped to thing to be detected, and after being reflected by thing to be detected, the mixed light after reflection The infrared absorption information of thing to be detected and the polarization information of visible ray are then attached, and these light by lens (i.e. collect by light Element 44) collection after, inject the second beam splitter 45.Second beam splitter 45 is long wave reduction of fractions to a common denominator light microscopic, and it will be seen that polarization The reflected light back that light beam is formed enters in the first beam splitter 461, the reflected light that the infrared beam with predetermined band is formed Transmit in the 3rd beam splitter 471.First beam splitter 461 and the 3rd beam splitter 471 are semi-transparent partly to return spectroscope.
The reflected light injected in the first beam splitter 461 by the first optical gating elements 462, the second optical gating elements 463, The processing of first detecting element 464, the second detecting element 465 and image processing elements, carry out based on thing 42 to be detected and different Differential responses of the property fiber 43 to polarised light detect foreign fiber, wherein the first optical gating elements 462 are polarization direction and institute State the first vertical polarizer of the polarization direction of the first prefabricated light beam 411, second optical gating elements 463 be polarization direction with The second parallel polarizer of the polarization direction of the first prefabricated light beam 411.First detecting element 464, the second detecting element 465 It is photodetector.First beam splitter 461, the first optical gating elements 462, the second optical gating elements 463, first detection member Part 464, the second detecting element 465 form visible Polarization Detection module 46.
The reflected light injected in the 3rd beam splitter 471 by the 3rd optical gating elements 472, the 4th optical gating elements 473, The processing of 3rd detecting element 474, the 4th detecting element 475 and image processing elements, carry out being based on thing to be detected and the opposite sex Fiber detects foreign fiber to the absorbing state of the light wave of specific band.3rd optical gating elements 472 are the 3rd optical filter, the Four optical gating elements 473 are the 4th optical filter, and the gating wave band of the 3rd optical filter is the characteristic wave bands of foreign fiber, and the 4th filters The gating wave band of piece is the characteristic wave bands of thing to be detected.3rd detecting element 474, the 4th detecting element 475 are photodetection Device.3rd beam splitter 471, the 3rd optical gating elements 472, the 4th optical gating elements 473, the 3rd detecting element the 474, the 4th are visited Survey element 475 and form infrared light detection module 47.
Certain first prefabricated light beam 411 can also be the infrared beam with predetermined band, and the second prefabricated light beam 412 may be used also Think visible polarized light beam, the embodiment of the present invention is to this without limiting.
The present embodiment will detect the skill of foreign fiber based on the differential responses to polarised light of thing to be detected and foreign fiber Art scheme with detecting the skill of foreign fiber to the absorbing state of the light wave of specific band based on thing to be detected and foreign fiber Art scheme is overlapped combination, and to carry out the detection of foreign fiber, accuracy of detection is effectively improved.
In one embodiment, as shown in figure 5, prefabricated light beam 51 includes the first prefabricated 511 and second prefabricated light beam of light beam 512, the first prefabricated light beam 511 is visible polarized light beam, and the second prefabricated light beam 512 is the infrared beam with predetermined band.Light Gathering element 54 collects the light that thing 52 to be detected reflects, and injects the second beam splitter 55.Second beam splitter 55 is short-pass Spectroscope, it will be seen that the reflection light transmission that light beam is formed enters in the first beam splitter 561, by with the red of predetermined band The reflected light back that outer light beam is formed enters in the 3rd beam splitter 571.First beam splitter 561 and the 3rd beam splitter 571 are equal Spectroscope is partly returned to be semi-transparent.
The reflected light injected in the first beam splitter 561 by the first optical gating elements 562, the second optical gating elements 563, The processing of first detecting element 564, the second detecting element 565 and image processing elements, carry out based on thing 52 to be detected and different Differential responses of the property fiber 53 to polarised light detect foreign fiber, wherein the first optical gating elements 562 are polarization direction and institute State the first vertical polarizer of the polarization direction of the first prefabricated light beam 511, second optical gating elements 563 be polarization direction with The second parallel polarizer of the polarization direction of the first prefabricated light beam 511.First detecting element 564, the second detecting element 565 It is photodetector.First beam splitter 561, the first optical gating elements 562, the second optical gating elements 563, first detection member Part 564, the second detecting element 565 form visible Polarization Detection module 56.
The reflected light injected in the 3rd beam splitter 571 by the 3rd optical gating elements 572, the 4th optical gating elements 573, The processing of 3rd detecting element 574, the 4th detecting element 575 and image processing elements, carry out being based on thing to be detected and the opposite sex Fiber detects foreign fiber to the absorbing state of the light wave of specific band.3rd optical gating elements 572 are the 3rd optical filter, the Four optical gating elements 573 are the 4th optical filter, and the gating wave band of the 3rd optical filter is the characteristic wave bands of foreign fiber, and the 4th filters The gating wave band of piece is the characteristic wave bands of thing to be detected.3rd detecting element 574, the 4th detecting element 575 are photodetection Device.3rd beam splitter 571, the 3rd optical gating elements 572, the 4th optical gating elements 573, the 3rd detecting element the 574, the 4th are visited Survey element 575 and form infrared light detection module 57.
Certain first prefabricated light beam 511 can also be the infrared beam with predetermined band, and the second prefabricated light beam 512 may be used also Think visible polarized light beam, the embodiment of the present invention is to this without limiting.
The present embodiment will detect the skill of foreign fiber based on the differential responses to polarised light of thing to be detected and foreign fiber Art scheme with detecting the skill of foreign fiber to the absorbing state of the light wave of specific band based on thing to be detected and foreign fiber Art scheme is overlapped combination, and to carry out the detection of foreign fiber, accuracy of detection is effectively improved.
In one embodiment, as shown in Figure 6, there is provided a kind of foreign fiber detection method, comprise the following steps：
100th, the first prefabricated light beam is formed, and thing to be detected is irradiated using the first prefabricated light beam；Thing to be detected projects first Reflected light；Wherein first prefabricated light beam is light beam or the light beam with predetermined band, and predetermined band includes foreign fiber The characteristic wave bands of characteristic wave bands and thing to be detected；
110th, the first reflected light is divided into the first beamlet and the second beamlet；Wherein the first beamlet and the second beamlet In include the predetermined light wave of the first kind and the predetermined light wave of the second class；The predetermined light wave of the first kind is polarization direction and the first prefabricated light beam The vertical light wave in polarization direction or wavelength be located at light wave in the characteristic wave bands of foreign fiber；The predetermined light wave of second class is inclined Shake the direction light wave parallel with the polarization direction of the first prefabricated light beam or wavelength is located at light in the characteristic wave bands of thing to be detected Ripple；
120th, the predetermined light wave of the first kind in the first beamlet is chosen, and utilizes the predetermined light of the first kind in the first beamlet Ripple forms the first image of thing to be detected；
130th, the predetermined light wave of the second class in the second beamlet is chosen, and utilizes the predetermined light of the second class in the second beamlet Ripple forms the second image of thing to be detected；
140th, judge whether the difference of the gray value of any two pixel in the first image is less than predetermined value, and judge Whether the difference of the gray value of any two pixel is less than predetermined value in two images, if in the first image any two pixel ash The difference of angle value is respectively less than predetermined value, and the difference of the gray value of any two pixel is respectively less than predetermined value in the second image, Do not include foreign fiber in thing to be detected then.
Certain step 140 can also be：Image processing elements be used for when the first prefabricated light beam is light beam, judge with Whether lower condition meets：The gray value of thing to be detected is apparently higher than the gray value of foreign fiber, and the second figure in first image The gray value of thing to be detected is close with the gray value of thing to be detected in the first image as in, but the gray value of foreign fiber is obvious Higher than during the gray value of foreign fiber, if condition is met, judging to include foreign fiber in thing to be detected in the first image；When When one prefabricated light beam is the light beam of predetermined band ripple, judge whether following condition meets：In first image and the second image The image of thing and foreign fiber to be detected is each formed with, the difference is that the gray value of object image to be detected is obvious in the first image More than the gray value of foreign fiber image, the gray value of object image to be detected is significantly less than the gray scale of foreign fiber in the second image Value, if condition is met, it is possible to determine that foreign fiber is included in thing to be detected.
The present embodiment utilizes thing to be detected different from polarization direction influence of the foreign fiber on light or to specific band The difference of absorption of light wave detect in thing to be detected whether contain foreign fiber, relative to using foreign fiber with it is to be checked The technical scheme accuracy of detection that the difference of survey thing color is detected effectively improves, and the embodiment of the present invention is to be based on light Ripple carries out foreign fiber detection, therefore is not influenceed by thing translational speed to be detected, ensures that the essence of opposite sex detection detection Degree.The detection to foreign fiber of the other embodiment of the present invention is automatically performed by devices such as beam splitter and optical gating elements , detection efficiency is effectively improved.
In one embodiment, foreign fiber detection method also comprises the following steps：
200th, the second prefabricated light beam is formed, and thing to be detected is irradiated using the second prefabricated light beam, thing to be detected projects second Reflected light, wherein the second prefabricated light beam is light beam or light beam with predetermined band；
210th, the second reflected light is divided into the 3rd beamlet and the 4th beamlet；Wherein, the 3rd beamlet and the 4th sub-light Shu Zhongjun includes the predetermined light wave of the 3rd class and the 4th predetermined light wave of class；The 3rd predetermined light wave of class is the spy that wavelength is located at foreign fiber Levy light wave or the polarization direction light wave vertical with the polarization direction of the second prefabricated light beam in wave band；The 4th predetermined light wave of class is Wavelength is located at light wave in the characteristic wave bands of thing to be detected or polarization direction is parallel with the polarization direction of the second prefabricated light beam Light wave；
220th, the 3rd predetermined light wave of class in the 3rd beamlet is chosen, and utilizes the 3rd predetermined light of class in the 3rd beamlet Ripple forms the 3rd image of thing to be detected；
230th, the 4th predetermined light wave of class in the 4th beamlet is chosen, and utilizes the 4th predetermined light of class in the 4th beamlet Ripple forms the 4th image of thing to be detected；
240th, judge whether the difference of the gray value of any two pixel in the 3rd image is less than predetermined value, and judge Whether the difference of the gray value of any two pixel is less than predetermined value in four images, if in the first image any two pixel ash The difference of angle value is respectively less than predetermined value, while the difference of the gray value of any two pixel is respectively less than predetermined value in the second image, The difference of the gray value of any two pixel is respectively less than predetermined value, while any two picture in the 4th image in the 3rd image simultaneously The difference of the gray value of element is respectively less than predetermined value, then does not include foreign fiber in thing to be detected.
Certainly, step 240 can also be with specific reference to the specific feelings of two kinds of object gray values in the first image and the second image Condition judges whether to contain foreign fiber in thing to be detected.
The detecting step of the device of each step and the embodiment of the present invention of the method for the embodiment of the present invention is to correspond , therefore the part for wherein repeating, no longer repeated.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any Those skilled in the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be covered Within protection scope of the present invention.Therefore, protection scope of the present invention described should be defined by scope of the claims.

Claims (12)

1. a kind of Foreign Fiber Detecting Device, it is characterised in that described device includes：
First prefabricated light source, irradiate thing to be detected for producing the first prefabricated light beam, and using the described first prefabricated light beam；It is described Thing to be detected projects the first reflected light；Wherein described first prefabricated light beam be light beam or with predetermined band light beam, institute Stating the light beam of predetermined band includes the light beam of the characteristic wave bands with foreign fiber and the characteristic wave with the thing to be detected The light beam of section；
First beam splitter, for first reflected light to be divided into the first beamlet and the second beamlet；Wherein described first Include the predetermined light wave of the first kind and the predetermined light wave of the second class in beamlet and second beamlet；The predetermined light of the first kind Ripple is the spy that the polarization direction light wave vertical with the polarization direction of the described first prefabricated light beam or wavelength are located at the foreign fiber Levy the light wave in wave band；The predetermined light wave of second class is that polarization direction is parallel with the polarization direction of the described first prefabricated light beam Light wave or wavelength are located at the light wave in the characteristic wave bands of the thing to be detected；
First optical gating elements, for receiving first beamlet, and the first kind gated in first beamlet makes a reservation for Light wave；
Second optical gating elements, for receiving second beamlet, and the second class gated in second beamlet makes a reservation for Light wave；
First detecting element, for receiving the predetermined light wave of the first kind in first beamlet, and form the thing to be detected The first image；
Second detecting element, for receiving the predetermined light wave of the second class in second beamlet, and form the thing to be detected The second image；
Image processing elements, it is predetermined whether the difference for judging the gray value of any two pixel in described first image is less than Value, and judge whether the difference of the gray value of any two pixel in second image is less than the predetermined value, if described The difference of the gray value of any two pixel is respectively less than the predetermined value in first image, and any two in second image The difference difference of the gray scale of individual pixel is respectively less than the predetermined value, then does not include foreign fiber in the thing to be detected.
2. device according to claim 1, it is characterised in that first optical gating elements are polarization direction and described the The first vertical polarizer of the polarization direction of one prefabricated light beam, second optical gating elements are that polarization direction and described first are pre- The second parallel polarizer of the polarization direction of light beam processed.
3. device according to claim 1, it is characterised in that first optical gating elements are the first optical filter, second Optical gating elements are the second optical filter；Wherein, the gating wave band of first optical filter is the characteristic wave bands of the foreign fiber, The gating wave band of second optical filter is the characteristic wave bands of the thing to be detected.
4. device according to claim 1, it is characterised in that first optical gating elements include the 3rd polarizer and 3rd optical filter, wherein the polarization direction of the 3rd polarizer is vertical with the polarization direction of the described first prefabricated light beam, it is described The gating wave band of 3rd optical filter is the characteristic wave bands of the foreign fiber；
Second optical gating elements include the 4th polarizer and the 4th optical filter, wherein the polarization side of the 4th polarizer To parallel with the polarization direction of the described first prefabricated light beam, the gating wave band of the 4th optical filter is the spy of the thing to be detected Levy wave band.
5. device according to claim 4, it is characterised in that the first prefabricated light beam is with the predetermined band ripple Light beam；
The predetermined light wave of the first kind is the polarized lightwave that wavelength is located in the characteristic wave bands of the foreign fiber, and described The polarization direction of a kind of predetermined light wave is vertical with the polarization direction of the described first prefabricated light beam；
The predetermined light wave of second class is the polarized lightwave that wavelength is located in the characteristic wave bands of the thing to be detected, and described The polarization direction of the predetermined light wave of two classes is parallel with the polarization direction of the described first prefabricated light beam.
6. device according to claim 1, it is characterised in that described device also includes：
Second prefabricated light source, thing to be detected is irradiated for producing the second prefabricated light beam, and using the described second prefabricated light beam, it is described Thing to be detected projects the second reflected light, wherein the second prefabricated light beam is light beam or polarised light with the predetermined band Beam；
Second beam splitter, for first reflected light to be injected into first beam splitter, second reflected light is penetrated Enter the 3rd beam splitter；
3rd beam splitter, it is divided into the 3rd beamlet and for receiving second reflected light, and by second reflected light Four beamlets；
Wherein, the predetermined light wave of the 3rd class and the 4th predetermined light of class are included in the 3rd beamlet and the 4th beamlet Ripple；The predetermined light wave of 3rd class is the light wave or polarization direction and institute that wavelength is located in the characteristic wave bands of the foreign fiber State the vertical light wave in the polarization direction of the second prefabricated light beam；The predetermined light wave of 4th class is that wavelength is located at the thing to be detected Light wave or polarization direction in the characteristic wave bands light wave parallel with the polarization direction of the described second prefabricated light beam；
3rd optical gating elements, for receiving the 3rd beamlet, and the 3rd class gated in the 3rd beamlet makes a reservation for Light wave；
4th optical gating elements, for receiving the 4th beamlet, and the 4th class gated in the 4th beamlet makes a reservation for Light wave；
3rd detecting element, for receiving the 3rd predetermined light wave of class in the 3rd beamlet, and form the thing to be detected The 3rd image；
4th detecting element, for receiving the 4th predetermined light wave of class in the 4th beamlet, and form the thing to be detected The 4th image；
Described image treatment element is additionally operable to, and judges whether the difference of the gray value of any two pixel in the 3rd image is small In the predetermined value, and judge whether the difference of the gray value of any two pixel in the 4th image is less than described make a reservation for Value, if the difference of the gray value of any two pixel is respectively less than the predetermined value, while second figure in described first image The difference of the gray value of any two pixel is respectively less than the predetermined value, while any two pixel in the 3rd image as in The difference of gray value be respectively less than the predetermined value, while in the 4th image gray value of any two pixel difference it is equal Less than the predetermined value, then do not include foreign fiber in the thing to be detected.
7. device according to claim 6, it is characterised in that the first prefabricated light beam is visible ray light beam or tool There is the infrared beam of the predetermined band；
The second prefabricated light beam is infrared beam or visible ray light beam with the predetermined band.
8. device according to claim 7, it is characterised in that second beam splitter is long wave reduction of fractions to a common denominator light microscopic or shortwave Reduction of fractions to a common denominator light microscopic.
9. device according to claim 8, it is characterised in that first beam splitter partly returns formula spectroscope to be semi-transparent； 3rd beam splitter partly returns formula spectroscope to be semi-transparent.
10. according to the device described in any one of claim 1 to 6, it is characterised in that described device also includes light collection device, First beam splitter or second are injected for collecting first reflected light and/or the second reflected light, and by the light of collection Beam splitter.
11. a kind of foreign fiber detection method, it is characterised in that methods described comprises the following steps：
The first prefabricated light beam is formed, and thing to be detected is irradiated using the described first prefabricated light beam；The thing to be detected projects first Reflected light；Wherein described first prefabricated light beam is light beam or the light beam with predetermined band, and the predetermined band includes different The property characteristic wave bands of fiber and the characteristic wave bands of the thing to be detected；
First reflected light is divided into the first beamlet and the second beamlet；Wherein described first beamlet and the second beamlet In include the predetermined light wave of the first kind and the predetermined light wave of the second class；The predetermined light wave of the first kind is polarization direction and described first The vertical light wave in the polarization direction of prefabricated light beam or wavelength are located at the light wave in the characteristic wave bands of the foreign fiber；Described The predetermined light wave of two classes is the polarization direction light wave parallel with the polarization direction of the described first prefabricated light beam or wavelength positioned at described Light wave in the characteristic wave bands of thing to be detected；
The predetermined light wave of the first kind in first beamlet is chosen, and utilizes the predetermined light of the first kind in first beamlet Ripple forms the first image of the thing to be detected；
The predetermined light wave of the second class in second beamlet is chosen, and utilizes the predetermined light of the second class in second beamlet Ripple forms the second image of the thing to be detected；
Judge whether the difference of the gray value of any two pixel in described first image is less than predetermined value, and judge described Whether the difference of the gray value of any two pixel is less than the predetermined value in two images, if any two in described first image The difference of the gray value of pixel is respectively less than the predetermined value, and in second image gray value of any two pixel difference Value is respectively less than the predetermined value, then does not include foreign fiber in the thing to be detected.
12. according to the method for claim 11, it is characterised in that methods described also comprises the following steps：
The second prefabricated light beam is formed, and thing to be detected is irradiated using the described second prefabricated light beam, the thing to be detected projects second Reflected light, wherein the second prefabricated light beam is light beam or light beam with the predetermined band；
Second reflected light is divided into the 3rd beamlet and the 4th beamlet；Wherein, the 3rd beamlet and the 4th sub-light Shu Zhongjun includes the predetermined light wave of the 3rd class and the 4th predetermined light wave of class；The predetermined light wave of 3rd class is that wavelength is located at the opposite sex Light wave or polarization direction in the characteristic wave bands of the fiber light wave vertical with the polarization direction of the described second prefabricated light beam；It is described The 4th predetermined light wave of class is the light wave or polarization direction and described second that wavelength is located in the characteristic wave bands of the thing to be detected The parallel light wave in the polarization direction of prefabricated light beam；
The 3rd predetermined light wave of class in the 3rd beamlet is chosen, and utilizes the 3rd predetermined light of class in the 3rd beamlet Ripple forms the 3rd image of the thing to be detected；
The 4th predetermined light wave of class in the 4th beamlet is chosen, and utilizes the 4th predetermined light of class in the 4th beamlet Ripple forms the 4th image of the thing to be detected；
Judge whether the difference of the gray value of any two pixel in the 3rd image is less than the predetermined value, and judge institute Whether the difference for stating the gray value of any two pixel in the 4th image is less than the predetermined value, if any in described first image The difference of the gray value of two pixels is respectively less than the predetermined value, at the same in second image any two pixel gray value Difference be respectively less than the predetermined value, while in the 3rd image difference of the gray value of any two pixel be respectively less than it is described Predetermined value, while the difference of the gray value of any two pixel is respectively less than the predetermined value in the 4th image, then it is described to treat Do not include foreign fiber in detectable substance.
CN201711036153.1A 2017-10-30 2017-10-30 Foreign Fiber Detecting Device and method Pending CN107727580A (en)

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CN1605662A (en) * 2003-10-10 2005-04-13 特鲁菲舍尔股份有限公司及两合公司 Apparatus on a spinning preparation for detecting foreign objects of plastics material
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