CN207779900U - Raman spectrum detection device based on reflected optical power and image recognition - Google Patents
Raman spectrum detection device based on reflected optical power and image recognition Download PDFInfo
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Abstract
This application discloses a kind of detection devices, including：Laser is configured to object emission laser to be detected；Raman spectrometer is configured to receive the Raman light from the object；Imaging device is disposed for obtaining the image of the object；Optical sensor is disposed for receiving the light for being reflected and being scattered by the object because stimulated light is irradiated, and determines the power of the light received by it；And controller, it is configured to the operation of detection device described in the power control of the image and optical sensor determination that are obtained based on the imaging device.
Description
Technical field
This application involves a kind of detection devices, and a kind of particularly drawing based on reflected optical power and image recognition
Graceful light spectrum detecting apparatus.
Background technology
Raman spectrum analysis technology is a kind of contactless spectral analysis technique based on Raman scattering effect, its energy
Qualitative and quantitative analysis is carried out to the ingredient of substance.Raman spectrum is a kind of molecular vibration spectrum, it can reflect the fingerprint of molecule
Feature can be used for the detection to substance.Raman spectrum detection is by detecting Raman scattering effect institute of the determinand for exciting light
The Raman spectrum of generation detects and identifies substance.
In recent years, Raman spectrum analysis technology is widely used in the fields such as dangerous material inspection and Object Classification.
In Object Classification field, due to the color of various substances, different, people are usually unable to judge accurately object qualitative attribution, and
Raman spectrum is determined by the molecular entergy level structure of checking matter, thus Raman spectrum can be used as " fingerprint " information of substance, is used for object
Matter identifies.Therefore Raman spectrum analysis technology is widely used in fields such as customs, public safety, food and medicine, environment.
Since Raman spectrum needs to use the laser of high power density as the 785nm laser of excitation light source, such as near-infrared
There is stronger fuel factor, in the case where the ingredient of examined object is unknown, detection rashly is likely to result in examined object
It is damaged by laser ablation, if examined object is inflammable and explosive chemicals, may result in the shapes such as generation burning, explosion
Condition causes the loss of personal property.
Utility model content
The purpose of the application is to solve or alleviate one or more technical problems in the prior art at least partly.
According to the one side of the application, a kind of detection device is provided.
According to an exemplary embodiment, the detection device may include：Laser is configured to object to be detected
Body emits laser；Raman spectrometer is configured to receive the Raman light from the object；Imaging device is disposed for
Obtain the image of the object；Optical sensor is disposed for receiving and is reflected and dissipated by the object due to stimulated light is irradiated
The light penetrated, and determine the power of the light received by it；And controller, it is configured to the image obtained based on the imaging device
And the operation of detection device described in the power control of the optical sensor determination.
According to another embodiment, the controller can be further configured to the power and one for determining optical sensor
Threshold power is made comparisons, and the comparison result control detection of the power determined according to optical sensor and the threshold power is set
Standby operation.
According to another embodiment, the imaging device can be further configured to obtain institute before laser emits laser
The image for stating object is used as with reference to image, and obtains the object in real time during laser transmitting laser is detected
Realtime graphic；And the controller is further configured to each frame in the reference picture and the realtime graphic
Image is made comparisons, and controls the detection device according to the comparison result of each frame image in reference picture and realtime graphic
Operation.
According to another embodiment, the imaging device can be further configured to emit laser to the object in laser
The realtime graphic of the object is obtained during being detected in real time；And the controller is further configured to institute
The first frame image for stating realtime graphic is made comparisons as with reference to image with other frame images in the realtime graphic, and according to reality
When image the comparison results of first frame image and other frame images control the operation of the detection device.
According to another embodiment, the detection device may also include warning device, and the controller is further matched
It is set to while indicating detection device termination detection or indicates that the warning device sends alarm signal later.
According to another embodiment, the detection device may also include：Fixing device is configured to the to be checked of the object
Survey surface is arranged to vertical with the direction for the laser being irradiated on the surface.
According to another embodiment, the fixing device can have：The laser of clear aperature, laser transmitting passes through the thang-kng
Aperture illumination is to the surface to be detected of the object；With interior positioning surface, it is arranged to and the laser across the clear aperature
Direction it is vertical, and the surface to be detected of the object is configured to be close to the interior positioning surface.
According to another embodiment, the detection device may also include：First spectroscope is arranged from the object to institute
It states in the Raman light light path of Raman spectrometer and is configured to laser aiming that the laser emits to the object and makes
It obtains the Raman light from the object and is transmitted to the Raman spectrometer across first spectroscope.
According to another embodiment, the detection device may also include：Second spectroscope is arranged from the object to institute
It states in the Raman light light path of Raman spectrometer and is configured to reflection visible light so that imaging device is to the image objects and permits
Perhaps the laser of the described laser transmitting and the Raman light from the object pass through second spectroscope.
According to another embodiment, the detection device may also include：Third spectroscope is arranged from the object to institute
It states in the Raman light light path of Raman spectrometer and is located at first spectroscope and second spectroscopical downstream, and is described
Third spectroscope is configured to will to be reflected and scattered by the object and penetrated first spectroscope and second and spectroscopical swashs
Light reflection is to the optical sensor and the Raman light from the object is made to be transmitted to the Raman across the third spectroscope
Spectrometer.
According to another embodiment, the detection device may also include at least one of following optical component：First filtering
Piece, the spectroscopical downstream of the third being arranged in the Raman light light path and is disposed for filtering out in optical signal
Reyleith scanttering light；Second filter plate is arranged between the laser and first spectroscope and is configured to the laser
What is sent out is laser-defined in desired wavelength period；With third filter plate, it is arranged in the imaging device and described second point
Between light microscopic and it is disposed for filtering out laser.
According to another embodiment, the detection device may also include at least one of following optical component：First assembles
Lens or lens group are arranged between the second spectroscope and the object；Second convergent lens or lens group, setting at
As between equipment and the second spectroscope；Third convergent lens or lens group, setting Raman spectrometer and third spectroscope it
Between；With the 4th convergent lens or lens group, it is arranged between optical sensor and third spectroscope.
According to another embodiment, the detection device may also include：Light source is configured to provide illumination to the object.
According to another embodiment, ranging from 5%- of first spectroscope for the transmitance of the laser of 45 degree of angle incidence
30%.
Description of the drawings
The preferred embodiment of the application will be described in conjunction with attached drawing by way of example now, wherein：
Fig. 1 is the schematical block diagram according to the detection device of one embodiment of the application；
Fig. 2 is the schematical flow chart according to the detection method of another embodiment of the application；With
Fig. 3 is the schematical flow chart according to the detection method of the another embodiment of the application.
Specific implementation mode
Describe the exemplary embodiment of the application in detail below in conjunction with attached drawing.Similar reference numeral in attached drawing refers to
For similar component or feature.The application can also other different forms realize that therefore embodiment set forth herein should not be by
It is construed to the limitation of the application.The purpose for providing these embodiments is that those skilled in the art is enable fully and completely to manage
Solve the design of the application.
A basic conception according to the present utility model, provides a kind of detection device.The detection device, including：Swash
Light device is configured to object emission laser to be detected；Raman spectrometer is configured to receive the Raman from the object
Light；Imaging device is disposed for obtaining the image of the object；Optical sensor is disposed for receiving because of stimulated light
Irradiation and by the object reflection and reversed Rayleigh scattering light, and determine its received by light power；And controller,
It is configured to detection device described in the power control of the image and optical sensor determination that are obtained based on the imaging device
Operation.
Fig. 1 shows the schematic diagram of the detection device of one embodiment according to present application.As shown in Figure 1, in the implementation
In example, detection device 100 includes：Laser 110 is configured to emit laser 111 to an object 120 to be detected；Raman light
Spectrometer 130 is configured to receive the Raman optical signal 112 from the object 120；Imaging device 180 is configured to obtain institute
State the image of object 120；Optical sensor 140, be disposed for receive due to stimulated light irradiate by the object 120 reflection with
The laser of reversed Rayleigh scattering, and determine the power of the light received by it；With controller 150, be configured to based on it is described at
The operation of detection device 100 described in the power control that the image and the optical sensor obtained as device determines.
To excite the Raman scattering effect of object to be detected, the laser of usual laser transmitting to have higher power close
Degree, and the laser of high power density can generate stronger fuel factor, if the color of object to be detected it is relatively deep (for example, it is dark-grey,
Black etc.), then object can more absorb laser and rapidly be increased so as to cause its surface temperature, may result in object by office
Portion is melted or ablation.Alternatively, if the fusing point of object to be detected is relatively low, though the color of object not deep laser emission if very
The temperature for being easy to cause the detection site of object is increased to fusing point or more, so as to cause object the detection site fusing or
Ablation.
To avoid the occurrence of above-mentioned phenomenon, the technical solution of the application provides optical sensor with by before formal detection
A pre-detection process judge object to be detected color the depth, to judge whether the shade degree of the object is suitable for
Laser detection is carried out, the shade program of only object is adapted for just carrying out formal laser inspection in the case of laser detection
It surveys；Imaging device is additionally provided simultaneously, to obtain the real-time figure of object in carrying out formal laser testing process to object
Picture, and whether judgment object or its detection site occur the significant changes (form of form or color in formal detection process
Or the significant changes of color can be considered as detected object or its part in detection process by laser ablation or fusing),
And determined whether to continue to execute detection according to judging result, safety measure appropriate is still taken, such as stop detection and/or hair
Go out alarm signal etc..
As will be understood by the skilled person in the art, reflectivity and Rayleigh scattering rate of the white or light-colored object for light
Height, therefore, the depth of the detected object color of power determination for the laser that can be reflected and scatter by detection object, and
Determine the detection operation of control detection device after the depth of object color.
In the present invention, optical sensor 140 may include any suitable photo-electric conversion element, such as and be not limited to：
Photodiode, phototriode, photo resistance etc..In an exemplary embodiment of the utility model, the light sensing
Device 140 includes photodiode.Photodiode is a kind of photosensitive photoelectric cell, and internal reverse current is with reception
To light power increase and increase, therefore can determine the light received by it based on the concrete numerical value of its reverse current
The concrete numerical value of power.It similarly, can also be according to the resistance value of photo resistance if optical sensor 140 includes photo resistance
The anti-power for pushing away the light received by it of variation.
Based on the technical solution of the utility model, it will be understood by those skilled in the art that if detected object 120 is
White or light-colored object, then its reflection and scattering laser with regard to more, optical sensor 140 receive from the anti-of object 120
The power for the laser penetrated and scattered also bigger.Therefore, a threshold power I can be presetth, if it is determined that optical sensor 140
The power I of the light received is greater than or equal to threshold power Ith, then it can determine that detected object is light or white object,
Otherwise it can determine that detected object is dark or black object.
Calculating for the power I for the light that optical sensor 140 receives can be by being stored in advance in the computer, long-range of execute-in-place
Software in the storage device in computer or controller 150 or algorithm or various special equipments or circuit in control centre is real
It is existing.For example, using photodiode in the case of, can by being measured to the reverse current in photodiode, into
And determine the power of light.What these technology contents will be appreciated that those skilled in the art, details are not described herein again.This
Outside, threshold power IthConcrete numerical value can be set according to concrete conditions such as the various technical parameters of detection device, detection environment
It is fixed.
In the above-described embodiments, controller 150 can be further configured to the power I and threshold that determine optical sensor 140
It is worth power IthIt makes comparisons：If the power I of the light received is greater than or equal to threshold power Ith(that is, I >=Ith), then it can determine that
Currently detected object 120 is white or light-colored object, can carry out laser detection, and indication laser 110 emit laser into
Row detection；If the power I of the light received is less than threshold power Ith(that is, I ＜ Ith), then judge the object being currently detected
120 be black or dark object, and higher to the absorption of laser energy, there are the risks of ablation, therefore may indicate that detection device end
Only detect.
In an exemplary embodiment, after detection program starts, and start it in formal laser testing process
Before, one section first can be sent out for carrying out pre-detection to object 120 to the object 120 for being placed on position to be detected from laser 110
Laser pulse (for example, 5 milliseconds laser pulse of duration), optical sensor 140 receive from object 120 because of the pulse
The irradiation of laser and the reflected light that generates and scattering light and determine reflection and scattering that optical sensor 40 receives light power
I, then judge power I whether greater than, equal to or be less than threshold power Ith.Based on power I and threshold power IthRelationship,
Controller 150 judges whether current examined object is adapted for formal laser detection.For example, controller 150 is configurable
For：When power I is greater than or equal to threshold power IthWhen, determine object is adapted for formal laser detection；And work as power I
Less than threshold power IthWhen, determine object be unsuitable for carry out formal laser detection.If controller 150 judges current to be checked
It surveys object and is suitable for laser detection, then controller 150 may indicate that laser 110 starts formally to send out continuous laser beam with to object
120 are detected.If controller 150 judges that current examined object is unsuitable for carrying out formal laser detection, 150 can be straight
Termination detection program is connect, laser 110 carries out formal detection without emitting continuous laser beam.
In addition, according to another embodiment, detection device 100 may also include a warning device 160.When controller 150 judges
It, can be while termination detection program or indicating alarm device 160 sends out an alarm signal later when object is unsuitable for laser detection
Number, it is not suitable for being detected or should not continues due to color relatively depth with the current object to be detected of staff near prompting
Operation is detected and/or detects to have terminated.Alarm signal can be at least one in specific voice signal, picture signal etc.
Kind.
It should be noted that same object (or the identical sample of shade degree) is different because of disposing way,
Detected surface, at different angles, may result in from the direction of detection laser beam and come from object by what optical sensor received
The reflection of body and the power for scattering light are different.Similarly, the different object of shade degree, because of its shape and disposing way
Difference, may result in by optical sensor receive to reflection from object and scatter light power it is identical.It is above-mentioned this
In the case of two kinds, the power distortion that optical sensor receives can cause controller to generate erroneous judgement to the depth degree of object color,
So as to cause the dangerous result of generation.
In order to be avoided as much as or eliminate the factors such as the shape because of different samples, disposing way to reflecting and scattering light
The influence of power, in a further embodiment, detection device 100 may also include the fixing device for fixed object 120
170。
Fixing device 170 for example can be box or clamp-type fixing device or other fixing devices or structure appropriate,
It is vertical with the direction of laser beam for being arranged on the surface to be detected of object 120 to be detected.For example, shown in Fig. 1
In exemplary embodiment, fixing device 170 is box fixing device, has the interior positioning table vertical with the direction of laser beam
Face, the surface to be detected of object 120 is close to the interior of fixing device 170 and is set to surface, to the surface to be detected of object 120
It is configured to vertical with the direction of laser beam.The rear portion of object 120 can fixing device 170 other fixed components appropriate
(not shown) further fixes.A light hole 171 can be offered in the antetheca of fixing device 170, laser beam can pass through
The light hole 171 is irradiated to the surface to be detected of the fixed object 120 inside fixing device 170.The shape of the light hole 171
Can be rectangular slot, rectangle square hole or circular hole etc..
CCD imaging devices, CMOS imager device or other imaging dresses as known in the art can be used in imaging device 180
It sets.The image of object can be the image of the object entirety obtained from a direction, can also be the image of a part for object,
The parameters such as size, the area of detection of detection device 100 of this and object 120 to be detected itself and whether have be used for object
The fixation of body 120 fill 170 set and its construct etc. it is related.For example, if object to be detected is small-sized jewel, it is imaged
Device can get the general image of object one side, and if the size of object to be detected is larger, imaging device can be right
The position to be detected of object carries out local tomography.
When the part of object is melted or when ablation, the usual part will appear the change of color and/or shape.By object
During the reference picture of body is compared with realtime graphic, if it find that a part for the object or object in image occurs
The change of color and/or shape, then controller can determine that laser ablation phenomenon occur in detected object or its part.
The comparison of reference picture and realtime graphic can be realized by various ways.
For example, in the first realization method, the reference picture is the object obtained in advance before formally detect
The image of body.Therefore, in this fashion, controller 150 be further configured to the reference picture that will be obtained ahead of time with it is formal
Each frame image in the realtime graphic obtained in detection is made comparisons.In addition, the step of obtaining reference picture can be by swashing
Light device 110 to object 120 carry out before or after pre-detection.It in an exemplary embodiment, can be by swashing
Light device 110 to object 120 carry out pre-detection after and between formally being detected to object 120 obtain object 120 ginseng
Examine image.
In second of realization method, the reference picture can be a part for realtime graphic.For example, the reference chart
Seem the first frame image of the realtime graphic, be used for in realtime graphic except each frame image after first frame carries out
Comparison.Therefore, in this fashion, controller 150 is further configured to the first frame of the realtime graphic as reference
Image is made comparisons with other frame images in the realtime graphic.Compared with the first described realization method, second of realization side
Advantageously, because in detection process, the image that laser beam itself can obtain imaging device 180 generates certain shadow to formula
It rings, to be unfavorable for accurately image comparison.
In an exemplary embodiment, it can determine whether object is burnt based on the grey scale change of the pixel in image
Erosion.For example, detection device 100 may include image processor (not shown), for the object that is obtained to imaging device
Reference picture and realtime graphic carry out gray processing processing, to obtain the gray scale of each pixel in reference picture and realtime graphic
It is worth (value between 0 to 255).In one example, image processor can be integrated in imaging device 180 (that is, imaging device
180 include image processor)；In another example, image processor can also be integrated in controller 150 (that is, controller
150 include image processor)；In other examples, image processor can also be provided in the computer for carrying out execute-in-place
Or in remote control center.It in an alternate embodiment, can also be by being stored in the computer of execute-in-place, in remote control center
Computer or controller 150 in storage device in software or algorithm to the image of object to be detected carry out gray processing processing with
Obtain the gray value of each pixel in image.
Determining that reference picture (formally detects the first frame figure in the subject image being obtained ahead of time before or realtime graphic
Picture) and realtime graphic in each frame image in each pixel gray value after, detection device 100 can, such as pass through meter
Calculation machine algorithm or par-ticular processor etc., by the ash of each pixel pixel corresponding with each of reference picture in realtime graphic
Angle value is compared (refers to image, comparison other is realtime graphic if be used as using the first frame image in realtime graphic
In first frame image in pixel gray value and realtime graphic in other frame images in pixel gray value.Similarly hereinafter).
If having more than the pixel of predetermined number in a certain frame image in realtime graphic or more than the total pixel number in realtime graphic
The pixel of predetermined percentage is different from the gray value of the pixel in reference picture, then has illustrated the form of object detection site
Significant changes have occurred, therefore can determine that object 120 or its part are ablated.Judging object to be detected or its part
After ablated, controller 150 can control detection device 100 to stop detection.In a further embodiment, controller 150
Also may further indicate that warning device 160 sends out alarm signal, with prompt the current article to be detected of relevant operation personnel by
Ablation and/or prompt relevant operation personnel's current detection operation have terminated.Alarm signal can be specific voice signal, image
At least one of signal.By the way that each pixel of each frame image in realtime graphic is corresponding with each of reference picture
The gray value of pixel is compared, if it is determined that the gray value of all pixels does not change or only by minimal amount of pixel
Gray value is changed or the changed pixel number of gray value accounts for the percentage very little of total pixel number, then explanation is detected
Significant changes do not occur for the form of the detection site of object (for example, it may be possible to be since systematic error or other reasons cause
), then detection process can proceed with.
For example, a number of pixels threshold value or percentage threshold can be preset, when the pixel that gray value changes
Number of the number beyond the pixel that the quantity threshold or gray value change exceeds relative to total pixel number purpose percentage
When the percentage threshold, then it can determine that detected object is ablated.Above-mentioned quantity threshold or percentage threshold can be according to reality
Situation is set.For example, can be set according to the detection range of detection device or the parameters such as areas imaging of image.
In the embodiment of another exemplary, it can determine whether object is burnt based on the color change of the pixel in image
Erosion.For example, the object that detection device 100 can obtain imaging device by image processor (not shown) or computerized algorithm
Each pixel in each frame image in the reference picture and realtime graphic of body carries out color identification, to obtain reference picture
With the color of each pixel in each frame image in realtime graphic.
After the color of each pixel in determining reference picture and realtime graphic in each frame image, detection device
100 can, such as by computerized algorithm or par-ticular processor etc., by each pixel of each frame image in realtime graphic and ginseng
The color for examining the corresponding pixel of each of image is compared.If had more than in a certain frame image in realtime graphic predetermined
The pixel of number or face more than the pixel in the pixel and reference picture of the predetermined percentage of the total pixel number in realtime graphic
Color is different, then illustrates that the form of object detection site has occurred that significant changes, therefore can determine that object 120 or its part
It is ablated.After judgement object to be detected or its part are ablated, controller 150 can control detection device 100
Stop detection.In a further embodiment, controller 150 also may further indicate that warning device 160 sends out alarm signal, with
It prompts the current article to be detected of relevant operation personnel ablated and/or prompts the operation of relevant operation personnel's current detection whole
Only.Alarm signal can be at least one of specific voice signal, picture signal.By by each frame figure in realtime graphic
The color of each pixel pixel corresponding with each of reference picture of picture is compared, if it is determined that the color of all pixels
It does not change or is only changed by the color of minimal amount of pixel or the changed pixel number of color accounts for total picture
The percentage very little of prime number then illustrates that significant changes do not occur for the form of the detection site of object to be detected (for example, it may be possible to be
Caused by systematic error or other reasons), then detection process can proceed with.
For example, a number of pixels threshold value or percentage threshold can be preset, when the number for the pixel that color changes
The number for the pixel that mesh changes beyond the quantity threshold or color relative to total pixel number purpose percentage beyond this hundred
When dividing than threshold value, then it can determine that detected object is ablated.Above-mentioned quantity threshold or percentage threshold can be according to actual conditions
It is set.For example, can be set according to the detection range of detection device or the parameters such as areas imaging of image.
The detection device 100 of the present invention can also include storage device (not shown) appropriate.Obtaining object
It, can be by reference pictures store in the storage device, so as in the subsequent comparison with realtime graphic after reference picture
It is transferred from storage device at any time in journey.
It, can before the gray value or color for determining reference picture and realtime graphic in order to keep image comparison more accurate
Enhancing processing can also be carried out to image by various algorithms by detection device 100, to improve gray value identification or color
The accuracy of identification.
According to another embodiment of the application, detection device 100 may also include one or more Optical devices, for configuring
Or light path (hereinafter referred to as " laser optical path ") between aiming laser 110 and object to be detected 120, object to be detected 120 with
Between light path (hereinafter referred to as " Raman light light path "), optical sensor 140 and object to be detected 120 between Raman spectrometer 130
Light path (hereinafter referred to as " power sensing light path ") and/or imaging device 180 and object to be detected 120 between light path it is (following
Referred to as " imaging optical path ").
As shown in Figure 1, Optical devices may include the first spectroscope 161, configure in Raman light light path, and be configured
At the laser aiming for emitting laser 110 to object to be detected 120 and the light letter from object to be detected 120 is not interfered with
Number propagation of (Raman diffused light) to Raman spectrometer 130.
As an example, the first spectroscope 161, which can be long wave, leads to dichroscope.Long wave leads to dichroscope and allows generally for wavelength
Light more than predetermined wavelength passes through, and reflection wavelength is less than the light of predetermined wavelength.Swash using laser irradiation object to be detected
In the case of sending out Raman scattering effect, the frequency of most Raman diffused lights reduces, and wavelength is elongated.Therefore, it properly configures
The long wave leads to the laser with predetermined wavelength that dichroscope can send out laser 110 and is reflected towards object to be detected 120,
And allow to lead to dichroscope towards Raman light by the long wave from the elongated Raman diffused light of the wavelength of object to be detected 120
Spectrometer 130 is propagated.The wavelength that long wave leads to the laser that dichroscope can emit according to laser 110 is configured or is set.
Although in the examples described above, the first spectroscope 22 is illustrated so that long wave leads to dichroscope as an example, this
First spectroscope 161 of application is not limited in long wave and leads to dichroscope, and other wavelength selections known in the art can be used
Light splitting part realizes above-mentioned function.
By the way that the first spectroscope 161 is arranged, laser optical path can be made to merge at least partly with Raman light light path, to have
Conducive to the overall dimensions of reduction detection device.
In addition, as shown in Figure 1, Optical devices may also include the second spectroscope 162, it is also deployed on Raman light light path
In, and reflection visible light is further configured to so that imaging device 180 is imaged examined object and allows laser 110
The laser of transmitting and Raman diffused light from object to be detected 120 pass through second spectroscope 162.
As an example, second spectroscope 162, which can also be long wave, leads to dichroscope.For example, being using wavelength
In the case of the near-infrared laser of 785nm (that is, laser 110 is configured to the near-infrared laser that launch wavelength is 785nm), by
In the wave-length coverage of visible light be usually 380nm to 780nm, therefore when the second spectroscope 162 is that long wave leads to dichroscope,
Visible light can be reflected, and the infrared light for allowing wavelength to be more than visible light passes through.In this way, it is right not interfere with imaging device 180
Examined object is imaged, the laser and Raman diffused light from object to be detected 120 that will not influence laser 110 transmitting
It propagates.The specific threshold value that long wave leads to dichroscope can be set according to actual conditions (for example, the parameters such as wavelength of laser)
Or configuration.In embodiments herein, the second spectroscope 162 is not limited to long wave and leads to dichroscope, can also use this field
The other light splitting parts known realize the above-mentioned function of the second spectroscope 162.
By the way that the second spectroscope 162 is arranged, imaging optical path can be made to merge at least partly with Raman light light path, to have
Conducive to the overall dimensions of reduction detection device.
It should be noted that above example is only through the operation principle that way of example illustrates the utility model, this
Utility model is not limited in above-mentioned specific embodiment, and the first spectroscope 161 and the second spectroscope 162 are also not limited to long wave
Logical dichroscope.For example, in another embodiment, laser 110 emits ultraviolet laser, at this point, the first spectroscope 161 is long wave
Logical dichroscope, and the second spectroscope 162 can be short-pass dichroscope.
As shown in Figure 1, in Raman light light path, the second spectroscope 162 be arranged than the first spectroscope 161 closer to be checked
Surveying object 120, (that is, the second spectroscope 162 is arranged in the upstream side of Raman light light path, and the first spectroscope 161 is arranged in Raman
The downstream side of light light path).However, the utility model is not limited in this specific construction.For example, emitting in laser 110
In the case of ultraviolet laser, the second spectroscope 162 can also be arranged relative to the first spectroscope 1261 under Raman light light path
Side is swum, and the second spectroscope 162 is short-pass dichroscope.
In addition, as shown in Figure 1, Optical devices may also include third spectroscope 163, it is also deployed on Raman light light path
In, and be further configured to reflect the reflected light of the fraction of laser light from object 120 and scattering light, so as to optical sensor
The power of 140 light is detected.
It should be noted that third spectroscope 163 can also be not arranged in Raman light light path, but individually with it
Light path.But being disposed in hand-pulled noodles light path can be such that sensing light path merges at least partly with Raman light light path, to have
Conducive to the overall dimensions of reduction detection device.It needs exist for further illustrating, if being arranged third spectroscope 163 such as
In Raman light light path shown in FIG. 1, then the first spectroscope 161 and the second spectroscope 162 need at least to be transmissive to anti-by object
A part for the laser penetrated and scattered.
In the exemplary embodiment, in order to ensure the utilization rate of the laser from laser 110, the first spectroscope 161
Include that the laser high-reflecting film with high reflectivity with predetermined wavelength is used for most of laser reflection to object 120,
In addition, first spectroscope 161 for the laser with predetermined wavelength also with scheduled transmitance.It needs to illustrate
It is that the concrete numerical value of reflectivity (or transmitance) can be set according to actual conditions, such as be swashed based on what laser 110 emitted
The lightsensitivity etc. of luminous power, optical sensor 140.Such as, it is generally the case that the first light splitting can be configured by modes such as plated films
Mirror 161, make its for the optical maser wavelength of 45 degree of angle incidence reflectivity between 70% to 95% (i.e. transmitance be 5%-
30%).
Third spectroscope 163 may include for optical maser wavelength film with high reflectivity or construction so that penetrate first
Spectroscope 161 and must allow spectroscope 162 fraction of laser light light beam can by fully or even fully towards optical sensor 140 instead
It penetrates.In order to keep optical sensor 140 more sensitive and accurate for the detection of light intensity, in the exemplary embodiment, third spectroscope
163 have the laser of the predetermined wavelength of 45 degree of angle incidence at least 94% reflectivity, it is preferable that reflectivity is at least
99.5%, fully to utilize the portion transmitted through the first spectroscope 161 and the second spectroscope 162 of the laser with wavelength
Point.
As an example, the third spectroscope 162, which can also be long wave, leads to dichroscope, laser 110 is sent out
The laser with predetermined wavelength with high reflectance, but the Raman for the wavelength bigger that laser generates after Raman scattering is allowed to dissipate
Light is penetrated to pass through.The specific threshold value that long wave leads to dichroscope can be according to actual conditions (for example, laser that laser 110 is sent out
The parameters such as wavelength) it is set or is configured.In embodiments herein, third spectroscope 163 is not limited to long wave and leads to dichroscope,
The above-mentioned function of third spectroscope 163 can also be realized using other light splitting parts known in the art.
By setting third spectroscope 163, power sensing light path can be made to merge at least partly with Raman light light path, from
And be conducive to reduce the overall dimensions of detection device.
In another embodiment, Optical devices can also include removing the first spectroscope 161, the second spectroscope 162 and third
Other one or more optical components except spectroscope 163.
For example, as shown in Figure 1, detection device 100, which may also include, is arranged in Raman light light path 161 downstream of the first spectroscope
The first filter plate 164, the Reyleith scanttering light for being disposed for filtering out in the optical signal after the first spectroscope 161 or other
Invalid stray light, to reduce their interference for Raman spectrometer.In the exemplary embodiment, first filter plate
164 may include long wave pass filter piece or notch filter piece.
In another embodiment, as shown in Figure 1, detection device 100 may also include first point be arranged in laser optical path
Second filter plate 165 of 161 upstream of light microscopic (that is, between laser 110 and first spectroscope 161), is configured to laser
110 send out it is laser-defined in desired wavelength period.In the exemplary embodiment, second filter plate 165 may include
Narrow band filter slice.
In another embodiment, as shown in Figure 1, detection device 100 may also include second point be arranged in imaging optical path
The third filter plate 166 in 162 downstream of light microscopic (that is, between the second spectroscope 162 and imaging device 180), can be configured for
Filter out the laser stray light from object 120, to avoid in imaging device 180 to the imaging process of object 120 in imaging fill
It sets 180 and causes unnecessary harm or interference.In the exemplary embodiment, for example, the third filter plate 166 can be sunken
Wave filter plate, the stray light for filtering out laser in the detection process of detection device 100 avoid laser stray light from entering imaging
Device 180 damages it.
In another embodiment, as shown in Figure 1, detection device 100 may also include setting the second spectroscope 162 with it is to be checked
The first convergent lens for surveying between object 120, is arranged between imaging device 180 and the second spectroscope 162 lens group 181
Second convergent lens or lens group 182, the third convergent lens being arranged between Raman spectrometer 130 and the first spectroscope 161
Or lens group 183, and/or the 4th convergent lens or lens group that are arranged between optical sensor 140 and third spectroscope 163
184.First convergent lens or lens group 181 can be used for imaging of the imaging device 180 to object 120, can be also used for collecting and
From the Raman light of the scattering of object 120 so that more Raman diffused lights can be transferred to Raman spectrometer, to contribute to
Improve accuracy and the sensitivity of the detection of detection device 100.Second convergent lens or lens group 182 can be used for imaging device
The imaging of 180 pairs of objects 120.Third convergent lens or lens group 183 can be used for assembling light so that more Raman diffused lights
Convergence enters Raman spectrometer, to be conducive to improve detection accuracy and the sensitivity of detection device 100.4th convergent lens
Or lens group 184 can be used for assembling light so that more the laser convergence from the reflection of third spectroscope enters optical sensor
140, to be conducive to improve detection accuracy and the sensitivity of optical sensor 140.
It should be noted that each in previously described first to fourth convergent lens or lens group may include figure
Single convex lens shown in 1 can also include the lens group with light-focusing function being made of multiple lens.
In addition, according to another embodiment, as shown in Figure 1, detection device 100 may also include lighting device 190, for providing
Illumination is provided to examined object 120.In general, detection device 100 has test side, and examined object 120 is close to the detection
End, therefore, it is impossible to provide enough illuminations to the position to be detected of examined object 120 by external light source.By detecting
100 inside of equipment provides or integrated illumination device 190, so that imaging device 180 obtains the clearly figure of examined object 120
Picture.Lighting device 190 may be provided at the position close to test side in detection device 100, for example, as shown in Figure 1, lighting device
190 may be provided between the second spectroscope 162 and examined object 120, can be located at the first convergent lens or lens group 166
Upstream or downstream.In other embodiments, any suitable position in detection device 100 can also be arranged in lighting device
It sets.Lighting device 190 for example may include one or more LED light.According to the another aspect of the application, a kind of inspection is additionally provided
Survey method.A total design according to the present utility model, detection method can mainly include the following steps that：Obtain reference picture；
Obtain the realtime graphic of the object in real time during emitting laser and being detected；Realtime graphic and reference picture are made
Compare；The operation of the detection device is controlled with the comparison result based on realtime graphic and reference picture.
The specific implementation of the detection method mainly may include be detailed below two kinds.
Fig. 2 shows according to a kind of method for being detected using above-mentioned detection device of one embodiment of the application
Schematical flow chart.As shown in Fig. 2, after detection device 100 starts (or detection program starts), the detection method can
Include the following steps：
Laser pulse to the transmitting of object 120 to be detected for pre-detection；
It receives the reflected light generated by the laser pulse from object 120 and determines the power I of the reflected light；
By determining power I and a threshold power IthIt makes comparisons, if power I is greater than or equal to threshold power Ith, then execute
Formal detection, if power I is less than threshold power Ith, then termination detection.
Wherein, executing formal detection includes：
The image that object to be detected is obtained before emitting laser is used as with reference to image；
Obtain the realtime graphic of the object in real time during emitting laser and being detected；
Realtime graphic is made comparisons with reference picture；With
The operation of detection device is controlled based on the comparison result of reference picture and realtime graphic.
In the exemplary embodiment, the operation of detection device is controlled based on the comparison result of reference picture and realtime graphic
The step of may include：
If realtime graphic is identical or essentially identical with reference picture, detection is continued to execute；With
If realtime graphic is dramatically different with reference picture, stop detecting.
It is appreciated that the frame realtime graphic in object 120 after end, continues to hold compared with reference picture if detected
It goes, then imaging device 180 will continue to obtain the next frame realtime graphic of object 120 to be compared with reference picture.Adjacent two
Time interval between frame realtime graphic can be set according to actual conditions.If each frame realtime graphic and reference picture are all
Identical or essentially identical, then detection device can work always to detection and complete.
After detection is completed or after termination detection, the work of detection device 100 terminates (or detection EP (end of program)).
The step of comparison of realtime graphic and reference picture, can be accomplished in several ways.
In an exemplary embodiment, the comparison of realtime graphic and reference picture may include：
Determine the gray value of each pixel in reference picture；
Determine the gray value of each pixel in each frame image in realtime graphic；
By the gray scale of the respective pixel of the gray value of each pixel in each frame image of realtime graphic and reference picture
Value is made comparisons, and to determine the number of the changed pixel of gray value in each frame image in realtime graphic, or is determined
The number of the changed pixel of gray value in realtime graphic in each frame image is relative to total pixel number purpose percentage；With
The number of the changed pixel of gray value in realtime graphic is made comparisons with a threshold number, or will be schemed in real time
The number of the changed pixel of gray value is relative to the total pixel number purpose percentage and a threshold value hundred in realtime graphic as in
Ratio is divided to make comparisons.
And the step S40 that the comparison result based on realtime graphic and reference picture controls the operation of the detection device can have
Include body：If the number of the changed pixel of gray value is less than the threshold number or the changed pixel of gray value
Number relative to total pixel number purpose percentage be less than threshold percentage (at this time it is believed that realtime graphic is identical as reference picture
Or essentially identical), it indicates that detection device continues to detect, otherwise, if any of the above-described index exceeds corresponding threshold value, it is believed that
Realtime graphic is dramatically different with reference picture, in this case, should indicate that detection device stops detection.
In an alternative embodiment, step S30 may include：
Determine the color of each pixel in reference picture；
Determine the color of each pixel in realtime graphic；
The color of the color of each pixel in each frame image of realtime graphic and the respective pixel of reference picture is made
Compare, to determine the number of the changed pixel of color in realtime graphic in each frame image, or determines realtime graphic
In the changed pixel of color in each frame image number relative to the total pixel number purpose percentage in realtime graphic；
The number of the changed pixel of color is made comparisons with a threshold number, or by the changed pixel of color
Number make comparisons with a threshold percentage relative to total pixel number purpose percentage.
And the step S40 ' that the comparison result based on realtime graphic and reference picture controls the operation of the detection device can
Include specifically：If the number of the changed pixel of color is less than the threshold number or the changed pixel of color
Number relative to total pixel number purpose percentage be less than threshold percentage (at this time it is believed that realtime graphic it is identical as reference picture or
It is essentially identical), it indicates that detection device continues to detect, otherwise, if any of the above-described index exceeds corresponding threshold value, it is believed that real
When image and reference picture it is dramatically different, in this case, should indicate detection device stop detection.
In the exemplary embodiment, step S42 can also include：While stopping detecting or later, alarm is sent
Signal may be damaged in the detection with prompting relevant staff to be detected article.
Fig. 3 shows another method of another embodiment according to the application being detected using above-mentioned detection device
Schematical flow chart.As shown in figure 3, after detection device 100 starts (S0), the detection method may include following step
Suddenly：
Laser pulse to the transmitting of object 120 to be detected for pre-detection；
It receives from the reflected light of object 120 generated by the laser pulse and reversed Rayleigh scattering light and determines this
The power I of the light of reflection and scattering；
By determining power I and a threshold power IthIt makes comparisons, if power I is greater than or equal to threshold power Ith, then execute
Formal detection, if power I is less than threshold power Ith, then termination detection.
Wherein, executing formal detection includes：
It is detected to examined object transmitting laser；
Obtain the realtime graphic of the object in real time during emitting laser and being detected, and by the realtime graphic
In first frame image be used as reference picture；
Other frame images in realtime graphic are made comparisons with the first frame image；With
Comparison result based on other frame images and first frame image controls the operation of detection device.
In the exemplary embodiment, the comparison result based on other frame images and first frame image controls detection device
The step of operation, may include：
If other described frame images and first frame image in realtime graphic are identical or essentially identical, inspection is continued to execute
It surveys；With
If other described frame images and first frame image in realtime graphic are dramatically different, it indicates that laser stops hair
Penetrate laser, and termination detection.
In the present embodiment, about whether identical or basic between the first frame image and other frame images in realtime graphic
The principle of identical or dramatically different judgement can be identical as previously described other embodiment, and details are not described herein again.
Above detailed description has elaborated above-mentioned Raman spectrum inspection by using schematic diagram, flow chart and/or example
Numerous embodiments of measurement equipment and its monitoring method.Include one or more functions in this schematic diagram, flow chart and/or example
And/or in the case of operation, it will be understood by those skilled in the art that each function in this schematic diagram, flow chart or example and/
Or operation can be by various structures, hardware, software, firmware or substantially their arbitrary combination come individually and/or common real
It is existing.In one embodiment, if the stem portion of theme described in embodiments herein can by application-specific integrated circuit (ASIC),
Field programmable gate array (FPGA), digital signal processor (DSP) or other integrated formats are realized.However, this field skill
Art personnel should be understood that some aspects of embodiments disclosed herein on the whole or partly can equally realize and collect
At the one or more computer programs in circuit, being embodied as running on one or more computer (for example, being embodied as one
The one or more programs run on platform or multiple stage computers system), it is embodied as one run on the one or more processors
A or multiple programs (for example, being embodied as the one or more programs run in one or more microprocessors) are embodied as solid
Part, or substantially it is embodied as the arbitrary combination of aforesaid way, and those skilled in the art will be provided with designing according to the application
The ability of circuit and/or write-in software and/or firmware code.In addition, it would be recognized by those skilled in the art that herein described master
The mechanism of topic can be distributed as the program product of diversified forms, and no matter actually be used for executing the signaling bearer of distribution
How is the concrete type of medium, and the exemplary embodiment of herein described theme is applicable in.The example of signal bearing medium includes
But it is not limited to：Recordable-type media, such as floppy disk, hard disk drive, CD (CD, DVD), digital magnetic tape, computer storage；
And transmission type media, such as number and/or analogue communication medium are (for example, optical fiber cable, waveguide, wired communications links, channel radio
Believe link etc.).
Although shown in the drawings of a specific embodiment of the utility model, it will be appreciated by a person skilled in the art that
Even if omitting one or more non-essential component/component, the utility model can still be implemented.In addition, although
Multiple exemplary embodiments have shown and described in combined attached drawing, but it will be appreciated by persons skilled in the art that can be not
To these embodiments, various modifications and variations can be made under the premise of the principle and essence of the application, therefore, the model of the application
Enclosing should be limited by appended claims and its equivalent technical solutions.
Claims (14)
1. a kind of detection device, which is characterized in that the detection device includes：
Laser is configured to object emission laser to be detected；
Raman spectrometer is configured to receive the Raman light from the object；
Imaging device is disposed for obtaining the image of the object；
Optical sensor is disposed for receiving the light for being reflected and being scattered by the object because stimulated light is irradiated, and determines it
The power of received light；With
Controller is configured to the power control institute of the image and optical sensor determination that are obtained based on the imaging device
State the operation of detection device.
2. detection device according to claim 1, wherein the controller is further configured to determine optical sensor
The power make comparisons with a threshold power, and according to optical sensor determine power and the threshold power comparison result
Control the operation of the detection device.
3. detection device according to claim 1, wherein：
The imaging device is further configured to obtain the image of the object as reference before laser emits laser
Image, and the realtime graphic of the object is obtained in real time during laser transmitting laser is detected；And
The controller is further configured to make comparisons the reference picture with each frame image in the realtime graphic,
And the operation of the detection device is controlled according to the comparison result of each frame image in reference picture and realtime graphic.
4. detection device according to claim 1, wherein：
The imaging device is further configured to during laser transmitting laser is detected the object in real time
Ground obtains the realtime graphic of the object；And
The controller be further configured to using the first frame image of the realtime graphic as with reference to image with it is described in real time
Other frame images in image are made comparisons, and are controlled according to the comparison result of the first frame image of realtime graphic and other frame images
The operation of the detection device.
5. detection device according to any one of claim 1 to 4, wherein the detection device further includes warning device,
And the controller is further configured to while indicating detection device termination detection or indicates later the alarm dress
Set transmission alarm signal.
6. detection device according to any one of claim 1 to 4, wherein the detection device further includes：
Fixing device is configured to the surface to be detected of the object is arranged to and is irradiated to the direction of the laser on the surface
Vertically.
7. detection device according to claim 6, wherein the fixing device has：
The laser of clear aperature, laser transmitting is irradiated to the surface to be detected of the object across the clear aperature；With
Interior positioning surface, is arranged to vertical with across the direction of laser of the clear aperature, and the object is described
Surface to be detected is configured to be close to the interior positioning surface.
8. detection device according to any one of claim 1 to 4, wherein the detection device further includes：
First spectroscope is arranged in the Raman light light path from the object to the Raman spectrometer and is configured to institute
The laser aiming of laser transmitting is stated to the object and the Raman light from the object is passed across first spectroscope
Transport to the Raman spectrometer.
9. detection device according to claim 8, wherein the detection device further includes：
Second spectroscope is arranged in the Raman light light path from the object to the Raman spectrometer and is configured to reflect
Visible light is so that imaging device is to the image objects and allows the laser of the laser transmitting and the drawing from the object
Graceful light passes through second spectroscope.
10. detection device according to claim 9, wherein the detection device further includes：
Third spectroscope, what is be arranged in the Raman light light path from the object to the Raman spectrometer is located at described first
Spectroscope and second spectroscopical downstream, and the third spectroscope is configured to be reflected and scattered by the object
And to the optical sensor and make from the object through first spectroscope and second spectroscopical laser reflection
Raman light is transmitted to the Raman spectrometer across the third spectroscope.
11. detection device according to claim 10, wherein the detection device further include in following optical component extremely
It is one few：
First filter plate, the spectroscopical downstream of the third being arranged in the Raman light light path and is disposed for filtering
Except the Reyleith scanttering light in optical signal；
Second filter plate is arranged between the laser and first spectroscope and is configured to send out in the laser
It is laser-defined in desired wavelength period；With
Third filter plate is arranged between the imaging device and second spectroscope and is disposed for filtering out sharp
Light.
12. detection device according to claim 11, wherein the detection device further include in following optical component extremely
It is one few：
First convergent lens or lens group are arranged between the second spectroscope and the object；
Second convergent lens or lens group are arranged between imaging device and the second spectroscope；
Third convergent lens or lens group are arranged between Raman spectrometer and third spectroscope；With the 4th convergent lens or
Lens group is arranged between optical sensor and third spectroscope.
13. detection device according to any one of claim 1 to 4, wherein the detection device further includes：
Light source is configured to provide illumination to the object.
14. detection device according to claim 8, wherein
Ranging from 5%-30% of first spectroscope for the transmitance of the laser of 45 degree of angle incidence.
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| CN201721859012.5U CN207779900U (en) | 2017-12-26 | 2017-12-26 | Raman spectrum detection device based on reflected optical power and image recognition |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107907527A (en) * | 2017-12-26 | 2018-04-13 | 同方威视技术股份有限公司 | Raman spectrum detection device and method based on reflected optical power and image recognition |
| CN109827946A (en) * | 2019-02-28 | 2019-05-31 | 华北水利水电大学 | Soil constituent in-situ analysis system and method |
-
2017
- 2017-12-26 CN CN201721859012.5U patent/CN207779900U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107907527A (en) * | 2017-12-26 | 2018-04-13 | 同方威视技术股份有限公司 | Raman spectrum detection device and method based on reflected optical power and image recognition |
| CN107907527B (en) * | 2017-12-26 | 2023-10-13 | 同方威视技术股份有限公司 | Raman spectrum detection equipment and method based on reflected light power and image recognition |
| CN109827946A (en) * | 2019-02-28 | 2019-05-31 | 华北水利水电大学 | Soil constituent in-situ analysis system and method |
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