CN105527301A - Detection system and detection method for voltage grade of electric heating pipe - Google Patents
Detection system and detection method for voltage grade of electric heating pipe Download PDFInfo
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- CN105527301A CN105527301A CN201610081153.2A CN201610081153A CN105527301A CN 105527301 A CN105527301 A CN 105527301A CN 201610081153 A CN201610081153 A CN 201610081153A CN 105527301 A CN105527301 A CN 105527301A
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- 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
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N21/956—Inspecting patterns on the surface of objects
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Abstract
The invention provides a detection system and a detection method for voltage grade of an electric heating pipe. The detection method comprises steps as follows: ceramic rings and voltage grade specifications are arranged on the electric heating pipe, and reference specifications are set in a controller; the controller controls an edge locating unit to enable a first camera to locate two poles of the electric heating pipe, controls a spot locating unit to enable the first camera to locate the ceramic rings, further controls a pixel number counting unit to enable the first camera to detect pixel values of the ceramic rings, and compares the pixel values with the reference specifications; furthermore, the controller controls a contour matching unit to enable a second camera to detect the voltage grade specifications and compares the voltage grade specifications with the reference specifications, if the pixel values and the voltage grade specifications are matched with the reference specifications, the electric heating pipe is qualified, and if any one of the pixel values and the voltage grade specifications is not matched with the reference specifications, the electric heating pipe is unqualified. According to the detection system and the detection method for the voltage grade of the electric heating pipe, the detection stability and the detection efficiency are improved, and the omission ratio and the false detection rate are decreased.
Description
Technical field
The present invention relates to the detection field of electric heating tube, especially a kind of detection system of electric pressure of electric heating tube and detection method.
Background technology
Heating element based on electric heating tube is widely used in every field, especially household electric appliances.Electric heating tube is tubular electrothermal element, is made up of metal tube, spiral resistance wire and crystal magnesium oxide powder etc.In general, distribute equably high temperature resistance silk in stainless steel seamless pipe, and insert heat conductivility and all good crystal magnesium oxide powder of insulating property in gap, structure is advanced, and the thermal efficiency is high, and heating evenly.And when have in high temperature resistance silk electric current by time, the heat of generation is spread to metal tube surface by magnesia powder, then is delivered in heated object or air and goes, thus reaches the object of heating.Be applicable to add hot-air, oil, water, chemical mediator, hot-die, fused salt, alkali and low-melting alloy etc.
For electric heating tube, multiple mode classification can be had:
(1) according to the use-pattern of electric heating tube, electric heating tube uses (air conditioner) etc. under having cast aluminium (electric iron), press-in aluminum component (grill), dry combustion method (barbecue tube), heating water (insulating pot), heating oil (fryer), blowing state;
(2) according to the tubing of electric heating tube, Bundy tube, aluminum pipe, copper pipe, stainless-steel tube, Ying Gelai pipe etc. can be divided into;
(3) according to the temperature under electric heating tube using state, cryotron, high-temperature pipe can be divided into.
On the two poles of the earth of electric heating tube, cover has porcelain ring, body is printed on electric pressure specification printed words.The electric pressure of this electric heating tube can be judged from the color of porcelain ring or specification printed words.In current industry, conventional color sensor detects the color differentiation of electric heating tube porcelain ring.But in actual production process, because porcelain ring position deviation, porcelain ring color have the reasons such as aberration, cause detecting stability not good, False Rate is high.Meanwhile, electric heating tube product electric pressure specification printed words are distinguished and are mainly detected by the mode of artificial naked eyes.But electric heating tube is easily obscured because of electric pressure specification printed words in process of production, it is the difficult problem always perplexing industry production manufacturer.Electric pressure specification printed words type matrix prints, and between product, often difference only has a numeral sometimes, and detected differentiation product specification by artificial mode, efficiency is very low in the past, and can not guarantee the accuracy of sorting.
Summary of the invention
The object of the present invention is to provide a kind of detection system and detection method of electric pressure of electric heating tube, to solve the high and inefficient problem of existing detection poor stability, False Rate.
In order to achieve the above object, the invention provides a kind of detection method of electric pressure of electric heating tube, comprising:
Set up product sample to be detected, described product sample comprises at least one electric heating tube, and the two poles of the earth of described electric heating tube are arranged with porcelain ring respectively, the body of described electric heating tube have electric pressure specification, and setting is with reference to specification in the controller;
Described electric heating tube is placed in the visual field of first camera, by electric heating tube described in the first light source irradiation, controlling described marginal position positioning unit by described controller makes first camera locate the position at the two poles of the earth of electric heating tube, also controlling described speckle locating unit makes first camera locate the position of porcelain ring on the two poles of the earth, also controlling described picture number statistic unit makes first camera detect the pixel value of porcelain ring, and whether pixel value described in comparison mates with reference to specification;
Described electric heating tube is placed in the visual field of second camera, described electric heating tube is irradiated by secondary light source, also controlling described outline unit by described controller makes second camera detect electric pressure specification on electric heating tube body, and whether electric pressure specification described in comparison mates with reference to specification, if described pixel value and electric pressure specification all with reference to specification are mated, then certified products detected, do not mate with reference to specification if arbitrary in described pixel value and electric pressure specification, then unacceptable product detected.
Further, also be provided with reference to spacing threshold in described controller, controlling described marginal position positioning unit by described controller makes first camera locate the position at the two poles of the earth of electric heating tube and the spacing obtained between the two poles of the earth, and whether this spacing of comparison drops within the interval with reference to spacing threshold, if within and described pixel value and electric pressure specification all mate with reference to specification, then certified products detected, if not within and arbitraryly in described pixel value and electric pressure specification not mate with reference to specification, then unacceptable product detected.
Further, the spacing between described the two poles of the earth is spacing between the inside edge at the two poles of the earth or the spacing between outer ledge.
Further, a described controller is connected with a first camera system and a second camera system respectively by one drag two pattern.
Further, the color of described porcelain ring is selected from the color of three kinds of different colour systems.
Present invention also offers a kind of detection system of electric pressure of electric heating tube, comprising:
First camera system, comprise first camera, marginal position positioning unit, speckle locating unit, as several statistic unit and the first light source for irradiating electric heating tube to be detected, described first camera is connected with described marginal position positioning unit, speckle locating unit and picture number statistic unit respectively;
Second camera system, comprise second camera, outline unit and the secondary light source for irradiating electric heating tube to be detected, described second camera is connected with outline unit;
Controller, respectively with described marginal position positioning unit, speckle locating unit, be connected as several statistic unit and outline unit, is provided with reference to specification in described controller;
Wherein, controlling described marginal position positioning unit by described controller makes first camera locate the position at the two poles of the earth of electric heating tube, also controlling described speckle locating unit makes first camera locate the position of porcelain ring on the two poles of the earth, also controlling described picture number statistic unit makes first camera detect the pixel value of porcelain ring, and whether pixel value described in comparison mates with reference to specification, also controlling described outline unit by described controller makes second camera detect electric pressure specification on electric heating tube body, and whether electric pressure specification described in comparison mates with reference to specification, if described pixel value and electric pressure specification all with reference to specification are mated, then certified products detected, do not mate with reference to specification if arbitrary in described pixel value and electric pressure specification, then unacceptable product detected.
Further, also be provided with reference to spacing threshold in described controller, controlling described marginal position positioning unit by described controller makes first camera locate the position at the two poles of the earth of electric heating tube and the spacing obtained between the two poles of the earth, and whether this spacing of comparison drops within the interval with reference to spacing threshold, if within and described pixel value and electric pressure specification all mate with reference to specification, then certified products detected, if not within and arbitraryly in described pixel value and electric pressure specification not mate with reference to specification, then unacceptable product detected.
Further, the spacing between described the two poles of the earth is spacing between the inside edge at the two poles of the earth or the spacing between outer ledge.
Further, a described controller is connected with a first camera system and a second camera system respectively by one drag two pattern.
Further, the color of described porcelain ring is selected from the color of three kinds of different colour systems.
The invention provides a kind of detection system and detection method of electric pressure of electric heating tube, in conjunction with porcelain ring being carried out to color detection and the result that electric pressure specification detects being judged to the electric pressure of electric heating tube, the electric heating tube mixing other types in the product sample due to particular type can be detected and the unacceptable product produced, also can detect that electric pressure specification and pixel value cause do not mate and the unacceptable product that causes owing to processing the reasons such as mistake, improve and detect stability and detection efficiency, reduce loss and false drop rate.
Accompanying drawing explanation
The structural representation of the detection system of the electric pressure of the electric heating tube that Fig. 1 provides for the embodiment of the present invention;
The cut-open view at electric heating tube the two poles of the earth place that Fig. 2 provides for the embodiment of the present invention;
The vertical view of the electric heating tube body that Fig. 3 provides for the embodiment of the present invention;
The Detection results figure of detection system when electric pressure is 127V and on the two poles of the earth, porcelain ring is black that Fig. 4 provides for the embodiment of the present invention;
The Detection results figure of detection system when electric pressure is 100V and on the two poles of the earth, porcelain ring is respectively pink and white that Fig. 5 provides for the embodiment of the present invention;
The Detection results figure of detection system when electric pressure is 220V and on the two poles of the earth, porcelain ring is pink that Fig. 6 provides for the embodiment of the present invention.
In figure, 1: porcelain ring, 2: body, 3: electric pressure specification.
Embodiment
Below in conjunction with schematic diagram, the specific embodiment of the present invention is described in more detail.According to following description and claims, advantages and features of the invention will be clearer.It should be noted that, accompanying drawing all adopts the form that simplifies very much and all uses non-ratio accurately, only in order to object that is convenient, the aid illustration embodiment of the present invention lucidly.
As shown in Figures 1 to 3, the invention provides a kind of detection system of electric pressure of electric heating tube, comprising:
First camera system, comprise first camera, marginal position positioning unit, speckle locating unit, as several statistic unit (not shown) and the first light source for irradiating electric heating tube to be detected, described first camera is connected with described marginal position positioning unit, speckle locating unit and picture number statistic unit respectively;
Second camera system, comprise second camera, outline unit (not shown, also to can be described as limit shape matching unit) and the secondary light source for irradiating electric heating tube to be detected, described second camera is connected with outline unit;
Controller, respectively with described marginal position positioning unit, speckle locating unit, be connected as several statistic unit and outline unit, is provided with reference to specification in described controller;
Wherein, controlling described marginal position positioning unit by described controller makes first camera locate the position at the two poles of the earth of electric heating tube, also controlling described speckle locating unit makes first camera locate the position of porcelain ring 1 on the two poles of the earth, also controlling described picture number statistic unit makes first camera detect the pixel value of porcelain ring, and whether pixel value described in comparison mates with reference to specification, also controlling described outline unit by described controller makes second camera detect electric pressure specification 3 on electric heating tube body 2, and whether electric pressure specification 3 described in comparison mates with reference to specification, if described pixel value and electric pressure specification all with reference to specification are mated, then certified products detected, do not mate with reference to specification if arbitrary in described pixel value and electric pressure specification, then unacceptable product detected.
It is to be understood that for qualified voltage heat pipe, because the porcelain ring color of this electric heating tube and electric pressure specification match, therefore describedly also included reference voltage grade specification with reference to both having contained reference pixel specification in specification, and the two matches.Therefore, the pixel value detected can be compared whether mate (whether identical) with reference to specification (reference color specification), also can compare the electric pressure specification detected and whether mate (whether identical) with reference to specification (reference voltage grade specification).
Please continue to refer to Fig. 1, in the present embodiment, the first light source and secondary light source are strip source.For first camera and second camera, according to the difference of adopted camera, can judge by monochrome pixels value or color pixel values.
In the present embodiment, also be provided with reference to spacing threshold in described controller, controlling described marginal position positioning unit by described controller makes first camera locate the position at the two poles of the earth of electric heating tube and the spacing obtained between the two poles of the earth, and whether this spacing of comparison drops within the interval with reference to spacing threshold, if within and described pixel value and electric pressure specification all mate with reference to specification, then certified products detected, if not within and arbitraryly in described pixel value and electric pressure specification not mate with reference to specification, then unacceptable product detected.
Further, the spacing between described the two poles of the earth is spacing between the inside edge at the two poles of the earth or the spacing between outer ledge.In the present embodiment, as shown in Figure 2, the spacing between the inside edge of two-stage is defined as the spacing between two-stage, is L, its accuracy of detection required is 0.5mm, this spacing can be obtained by the X-coordinate value of inward flange position, the two poles of the earth is made difference.
As a nonrestrictive embodiment, a described controller is connected with a first camera system and a second camera system respectively by one drag two pattern.Particularly, so-called one drag two pattern, namely a controller can control two non intelligent cameras, and two cameras, two TRIG signals of arranging in pairs or groups trigger, first camera collocation TRIG1, second camera collocation TRIG2, TRIG1, TRIG2 trigger sequence indefinite.The advantage of one drag two pattern is adopted to mainly contain: to save hardware cost, bring economic benefit to client; Switch board arrangement is more succinctly attractive in appearance, installs own Du Genggao; The system integration is higher, saves communication resources.
Further, the color of described porcelain ring is selected from the color of three kinds of different colour systems.Such as, porcelain ring mixed to be barricaded as in vain by white, pink, black three kinds of colors, black, pinky white, pink, black and white five kinds of specification products, but is not limited thereto.In the present embodiment, dividing by product electric pressure specification printed words of electric heating tube to be detected has: 110V, 220V, 127V, 230V, 100V be totally five classes.
Present invention also offers a kind of detection method of electric pressure of electric heating tube, comprising:
Set up product sample to be detected, described product sample comprises at least one electric heating tube, and the two poles of the earth of described electric heating tube are arranged with porcelain ring respectively, the body of described electric heating tube have electric pressure specification, and setting is with reference to specification in the controller;
Described electric heating tube is placed in the visual field of first camera, by electric heating tube described in the first light source irradiation, controlling described marginal position positioning unit by described controller makes first camera locate the position at the two poles of the earth of electric heating tube, also controlling described speckle locating unit makes first camera locate the position of porcelain ring on the two poles of the earth, also controlling described picture number statistic unit makes first camera detect the pixel value of porcelain ring, and whether pixel value described in comparison mates with reference to specification;
Described electric heating tube is placed in the visual field of second camera, described electric heating tube is irradiated by secondary light source, also controlling described outline unit by described controller makes second camera detect electric pressure specification on electric heating tube body, and whether electric pressure specification described in comparison mates with reference to specification, if described pixel value and electric pressure specification all with reference to specification are mated, then certified products detected, do not mate with reference to specification if arbitrary in described pixel value and electric pressure specification, then unacceptable product detected.
In the present embodiment, the first light source and secondary light source are strip source.For first camera and second camera, according to the difference of adopted camera, can judge by monochrome pixels value or color pixel values.
In the present embodiment, also be provided with reference to spacing threshold in described controller, controlling described marginal position positioning unit by described controller makes first camera locate the position at the two poles of the earth of electric heating tube and the spacing obtained between the two poles of the earth, and whether this spacing of comparison drops within the interval with reference to spacing threshold, if within and described pixel value and electric pressure specification all mate with reference to specification, then certified products detected, if not within and arbitraryly in described pixel value and electric pressure specification not mate with reference to specification, then unacceptable product detected.
Further, the spacing between described the two poles of the earth is spacing between the inside edge at the two poles of the earth or the spacing between outer ledge.In the present embodiment, the spacing between the inside edge of two-stage is defined as the spacing between two-stage, is L, its accuracy of detection required is 0.5mm, can obtain this spacing by the X-coordinate value of inward flange position, the two poles of the earth is made difference.
As a nonrestrictive embodiment, a described controller is connected with a first camera system and a second camera system respectively by one drag two pattern.Particularly, so-called one drag two pattern, namely a controller can control two non intelligent cameras, and two cameras, two TRIG signals of arranging in pairs or groups trigger, first camera collocation TRIG1, second camera collocation TRIG2, TRIG1, TRIG2 trigger sequence indefinite.The advantage of one drag two pattern is adopted to mainly contain: to save hardware cost, bring economic benefit to client; Switch board arrangement is more succinctly attractive in appearance, installs own Du Genggao; The system integration is higher, saves communication resources.
Further, the color of described porcelain ring is selected from the color of three kinds of different colour systems.Such as, porcelain ring mixed to be barricaded as in vain by white, pink, black three kinds of colors, black, pinky white, pink, black and white five kinds of specification products, but is not limited thereto.In the present embodiment, dividing by product electric pressure specification printed words of electric heating tube to be detected has: 110V, 220V, 127V, 230V, 100V be totally five classes.
In addition, when distinguishing electric heating tube electric pressure by product electric pressure printed words, present invention employs outline unit and electric heating tube is detected.This is because, need to consider following several respects factor when detecting:
(1) there is side-play amount in the position of character print;
(2) interference of key character side character is eliminated, once namely alignment error affects detection;
(3) 110V 220V 127V 230V 100V five class character only needs to detect numerical portion, but owing to there is the identical of individual characters, such as 110 and 100,220 and 230 between the different three figure place characters of five classes; So will ensure to detect stable differentiation, need to use outline unit to detect respectively to three characters.
Outline unit is the form fit based on profile, and it refers to weighs similarity between shape according to certain measurement criterion.It has a wide range of applications in fields such as computer vision, pattern-recognition, remote Sensing Image Analysis, Text region.
The present invention distinguishes product category by product electric pressure specification, is actually distinguishing for three-figure number, the function not adopting OCR to identify and adopt outline unit, and its main advantage is following several respects:
(1) realization of OCR function is the positioning function based on instrument, and current production character print position offset is comparatively large, and outline unit possesses framing function and OCR function does not possess positioning function, needs other orientation tools auxiliary;
(2) because of the factor such as the depth, font size difference, type matrix wearing and tearing, the skew of Print direction position that type matrix prints, cause font to print consistance poor, if use OCR function to need to set up a large amount of font character libraries, obviously this can bring huge workload.Outline unit possesses the profile scaling with its sample image 10%, and its function utilizes the similarity of shape to carry out judged result, and therefore, once setting can complete detection operation.
Please refer to Fig. 4 ~ 6, the embodiment of the present invention additionally provides the Detection results figure under different electric pressure specification and different porcelain ring color.In figure, NG represents unacceptable product, and OK represents certified products.
The present invention also adopts said detecting system and detection method to carry out detection experiment, please refer to table 1.
Table 1
Associative list 1 is known, adopts described detection system and detection method to carry out detection experiment, can greatly reduce loss and false drop rate, in this experiment, loss and false drop rate can be made to be zero.
The invention provides a kind of detection system and detection method of electric pressure of electric heating tube, in conjunction with porcelain ring being carried out to color detection and the result that electric pressure specification detects being judged to the electric pressure of electric heating tube, the electric heating tube mixing other types in the product sample due to particular type can be detected and the unacceptable product produced, also can detect that electric pressure specification and pixel value cause do not mate and the unacceptable product that causes owing to processing the reasons such as mistake, improve and detect stability and detection efficiency, reduce loss and false drop rate.
Above are only the preferred embodiments of the present invention, any restriction is not played to the present invention.Any person of ordinary skill in the field; in the scope not departing from technical scheme of the present invention; the technical scheme disclose the present invention and technology contents make the variations such as any type of equivalent replacement or amendment; all belong to the content not departing from technical scheme of the present invention, still belong within protection scope of the present invention.
Claims (10)
1. a detection method for the electric pressure of electric heating tube, is characterized in that, comprising:
Set up product sample to be detected, described product sample comprises at least one electric heating tube, and the two poles of the earth of described electric heating tube are arranged with porcelain ring respectively, the body of described electric heating tube have electric pressure specification, and setting is with reference to specification in the controller;
Described electric heating tube is placed in the visual field of first camera, by electric heating tube described in the first light source irradiation, controlling described marginal position positioning unit by described controller makes first camera locate the position at the two poles of the earth of electric heating tube, also controlling described speckle locating unit makes first camera locate the position of porcelain ring on the two poles of the earth, also controlling described picture number statistic unit makes first camera detect the pixel value of porcelain ring, and whether pixel value described in comparison mates with reference to specification;
Described electric heating tube is placed in the visual field of second camera, described electric heating tube is irradiated by secondary light source, also controlling described outline unit by described controller makes second camera detect electric pressure specification on electric heating tube body, and whether electric pressure specification described in comparison mates with reference to specification, if described pixel value and electric pressure specification all with reference to specification are mated, then certified products detected, do not mate with reference to specification if arbitrary in described pixel value and electric pressure specification, then unacceptable product detected.
2. the detection method of the electric pressure of electric heating tube as claimed in claim 1, it is characterized in that, also be provided with reference to spacing threshold in described controller, controlling described marginal position positioning unit by described controller makes first camera locate the position at the two poles of the earth of electric heating tube and the spacing obtained between the two poles of the earth, and whether this spacing of comparison drops within the interval with reference to spacing threshold, if within and described pixel value and electric pressure specification all mate with reference to specification, then certified products detected, if not within and arbitraryly in described pixel value and electric pressure specification not mate with reference to specification, then unacceptable product detected.
3. the detection method of the electric pressure of electric heating tube as claimed in claim 2, is characterized in that, the spacing between described the two poles of the earth is spacing between the inside edge at the two poles of the earth or the spacing between outer ledge.
4. the detection method of the electric pressure of electric heating tube as claimed in claim 1, is characterized in that, a described controller is connected with a first camera system and a second camera system respectively by one drag two pattern.
5. the detection method of the electric pressure of electric heating tube as claimed in claim 1, it is characterized in that, the color of described porcelain ring is selected from the color of three kinds of different colour systems.
6. a detection system for the electric pressure of electric heating tube, is characterized in that, comprising:
First camera system, comprise first camera, marginal position positioning unit, speckle locating unit, as several statistic unit and the first light source for irradiating electric heating tube to be detected, described first camera is connected with described marginal position positioning unit, speckle locating unit and picture number statistic unit respectively;
Second camera system, comprise second camera, outline unit and the secondary light source for irradiating electric heating tube to be detected, described second camera is connected with outline unit;
Controller, respectively with described marginal position positioning unit, speckle locating unit, be connected as several statistic unit and outline unit, is provided with reference to specification in described controller;
Wherein, controlling described marginal position positioning unit by described controller makes first camera locate the position at the two poles of the earth of electric heating tube, also controlling described speckle locating unit makes first camera locate the position of porcelain ring on the two poles of the earth, also controlling described picture number statistic unit makes first camera detect the pixel value of porcelain ring, and whether pixel value described in comparison mates with reference to specification, also controlling described outline unit by described controller makes second camera detect electric pressure specification on electric heating tube body, and whether electric pressure specification described in comparison mates with reference to specification, if described pixel value and electric pressure specification all with reference to specification are mated, then certified products detected, do not mate with reference to specification if arbitrary in described pixel value and electric pressure specification, then unacceptable product detected.
7. the detection system of the electric pressure of electric heating tube as claimed in claim 6, it is characterized in that, also be provided with reference to spacing threshold in described controller, controlling described marginal position positioning unit by described controller makes first camera locate the position at the two poles of the earth of electric heating tube and the spacing obtained between the two poles of the earth, and whether this spacing of comparison drops within the interval with reference to spacing threshold, if within and described pixel value and electric pressure specification all mate with reference to specification, then certified products detected, if not within and arbitraryly in described pixel value and electric pressure specification not mate with reference to specification, then unacceptable product detected.
8. the detection system of the electric pressure of electric heating tube as claimed in claim 7, is characterized in that, the spacing between described the two poles of the earth is spacing between the inside edge at the two poles of the earth or the spacing between outer ledge.
9. the detection system of the electric pressure of electric heating tube as claimed in claim 1, is characterized in that, a described controller is connected with a first camera system and a second camera system respectively by one drag two pattern.
10. the detection system of the electric pressure of electric heating tube as claimed in claim 1, it is characterized in that, the color of described porcelain ring is selected from the color of three kinds of different colour systems.
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