CN211014597U - Glass surface line defect rapid detection device - Google Patents
Glass surface line defect rapid detection device Download PDFInfo
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- CN211014597U CN211014597U CN201920931060.3U CN201920931060U CN211014597U CN 211014597 U CN211014597 U CN 211014597U CN 201920931060 U CN201920931060 U CN 201920931060U CN 211014597 U CN211014597 U CN 211014597U
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Abstract
The utility model discloses a glass surface line defect rapid detection device, which comprises a detection platform, a guide rail which moves back and forth relative to the X axis of the detection platform, a motor group which drives the guide rail to move, a translation mechanism which is fixedly arranged at two ends of a centering position right above the detection platform, and two electrodes which are fixedly arranged on the translation mechanism and move along the translation mechanism, wherein the detection platform is electrically connected with the translation mechanism through the two electrodes; the glass to be detected is arranged above the guide rail and is fixed on the detection platform through the clamping device, the optical detection mechanism is fixedly installed on the translation mechanism, two translation motors for driving the optical detection mechanism are installed at two ends of the translation mechanism respectively, and the optical detection mechanism moves left and right along the Z axis under the driving of the translation motors. The optical detection mechanism comprises a light source and M high-precision cameras fixed right above the light source, the light source and the high-precision cameras are fixedly connected with the translation mechanism respectively, and the electric heating wire and the antenna can be detected simultaneously.
Description
Technical Field
The utility model relates to a glass surface line defect short-term test device belongs to glass surface defect and detects technical field.
Background
The glass surface circuit comprises an electric heating wire and an antenna, the glass is heated and defrosted through the electric heating wire of the rear window glass of the automobile, the defrosting effect of the glass can be effectively achieved, and the antenna is used for helping the automobile to receive radio audio signals. The problems of improper surface circuit processing, such as different thicknesses of the electric heating wire antennas, connection defects of junctions of the electric heating wire antennas and the like, can be caused in the industrial production process, so that the defrosting effect of the electric heating wire and the signal receiving capability of the antenna are affected. At present, the technical methods for detecting the electric heating wire and the antenna are few, and most of the technical methods are detection through a circuit detection mode. The existing automobile windshield heating wire detection is mainly based on infrared photoelectric imaging. After two ends of the glass are electrified, a thermal image of the heated automobile rear windshield heating wire is obtained by an infrared thermal imager, image preprocessing and thinning processing are carried out on the image, and then the number of the rear windshield heating wires is identified and counted. This way of circuit detection has the following drawbacks:
(1) the circuit detection does not know the specific position of the defect, and the thin part but not completely disconnected part in the heating wire can not be detected, and the parts are easy to generate current heat effect to fuse, thereby bringing hidden danger to the use in the future;
(2) the experimental results are different, and the results are obtained by analyzing different conditions after the detection is finished;
(3) the infrared photoelectric imaging can detect the heating wire, but cannot detect the circuit of the antenna part, and the detection is not comprehensive enough.
Therefore, the technical problem to be solved at present is to design a circuit and a heating wire which can detect the fine but not broken part of the antenna part, and can directly obtain the detection result after the detection is finished, and the experimental result does not need to be analyzed again.
Disclosure of Invention
The utility model aims to overcome among the prior art glass surface circuit defect detection in can't detect antenna part's circuit and heater strip in thin but not yet break off the department, detect simultaneously the end and still need the analytical test result again just can obtain the not enough of detecting the theorem, provide a glass surface circuit defect detection device, technical scheme as follows:
the rapid detection device for the line defects on the surface of the glass comprises a detection platform, a guide rail, a motor set, a translation mechanism and two electrodes, wherein the guide rail moves back and forth relative to an X axis of the detection platform, the motor set drives the guide rail to move, the translation mechanism is fixedly arranged at two ends of a centering position right above the detection platform, the two electrodes are fixedly arranged on the translation mechanism and move along a Z axis of the translation mechanism, and the detection platform is electrically connected with the translation mechanism through the two electrodes;
the glass to be detected is arranged above the guide rail and is fixed on the detection platform through the clamping device,
an optical detection mechanism is fixedly installed on the translation mechanism, translation motors for driving the optical detection mechanism are installed at two ends of the translation mechanism respectively, and the optical detection mechanism moves left and right along the Z axis under the driving of the translation motors.
The optical detection mechanism comprises a light source and M high-precision cameras fixed right above the light source, wherein the light source and the high-precision cameras are fixedly connected with the translation mechanism through a first connecting plate and a second connecting plate respectively; the translation mechanism drives the high-precision camera array to translate and sequentially acquire the images of the glass to be detected.
Preferably, the M high-precision cameras are uniformly arranged on the translation mechanism in the Y-axis direction.
Further, there are 6 clamping devices.
Furthermore, a lead connected to the case of the resistance tester is installed on the electrode and used for testing the resistance value of the thermal lead on the surface of the glass.
Compared with the prior art, the utility model discloses the beneficial effect who reaches:
(1) a plurality of high-precision cameras are controlled by the translation motor to shoot to obtain glass surface images, and the positions of the defects of the lines on the glass surface are found in an image processing mode, so that the detection is more accurate.
(2) The method comprises the steps of firstly, detecting whether the glass to be detected is defective by using electrical detection, and then, detecting defect information by using optical detection, so that the detection accuracy of the line on the surface of the glass is improved.
(3) The optical detection mode detects both the electric heating wire and the antenna on the glass surface, and solves the problem of antenna detection which cannot be solved by infrared light spot imaging.
Drawings
FIG. 1 is an exploded view of the device for rapidly detecting defects on a glass surface circuit according to the present invention;
FIG. 2 is a rear elevational view of FIG. 1;
FIG. 3 is a schematic view of the optical detection mechanism of FIG. 1;
FIG. 4 is a rear elevational view of FIG. 3;
in the figure: 1-detection platform, 2-guide rail, 3-electrode, 4-translation motor, 5-optical detection mechanism, 51-high precision camera, 52-light source, 53-first connecting plate, 54-second connecting plate, 6-translation mechanism, 7-glass to be detected, and 8-clamping device.
Detailed Description
The present invention will be further described with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1-4, the device for rapidly detecting line defects on glass surface of the present invention comprises a detection platform 1, a guide rail 2 moving back and forth relative to the X axis of the detection platform 1, a motor set (not shown in the figure) for driving the guide rail 2 to move, a translation mechanism 6 fixedly installed at two ends of the centering position right above the detection platform 1, two electrodes 3 fixedly installed on the translation mechanism 6 and moving along the Z axis of the translation mechanism 6, wherein the detection platform 1 is electrically connected with the translation mechanism 6 through the two electrodes 3;
the glass 7 to be detected is arranged above the guide rail 2 and is fixed on the detection platform 1 through the clamping device 8, specifically, the clamping device 8 can control the glass 7 to be detected to be fixed at the same position every time, the moving distance of the clamping device 8 is determined by the model of the glass 7 to be detected according to the stored data, and basic parameter basis is provided for subsequent circuit detection and optical detection.
An optical detection mechanism 5 is fixedly installed on the translation mechanism 6, a translation motor 4 for driving the optical detection mechanism 5 is installed at each of two ends of the translation mechanism 6, and the optical detection mechanism 5 moves left and right along the Z axis under the driving of the translation motor 4.
In the embodiment, the optical detection mechanism 5 comprises a light source 52 and M high-precision cameras 51 fixed right above the light source 52, wherein the light source 52 and the high-precision cameras 51 are respectively and fixedly connected with a translation mechanism 6 through a first connecting plate 53 and a second connecting plate 54; the translation mechanism drives the high-precision camera array to translate and sequentially acquire the images of the glass to be detected.
As a preferable mode in the present embodiment, the M high-precision cameras 51 are uniformly arranged on the translation mechanism 6 in the Y-axis direction.
In this embodiment, there are 6 clamping devices 8. The position of the glass to be measured is fixed, and the heights of the 4 clamps in the direction of the guide rail are consistent.
In this embodiment, the electrode 3 is provided with a lead wire connected to the case of the resistance tester, and is used for obtaining the resistance value of the glass 7 to be tested.
The utility model discloses a detection device's detection principle as follows, including following step:
s1: adopting circuit detection to determine suspicious defects on the glass surface, namely local broken line positions or positions with large resistance value contrast difference;
s2: then, accurately positioning the position of the glass surface defect by optical detection;
in this embodiment, the circuit detection in the foregoing step S1 includes the following steps:
s11, initializing data of the detection device;
s12: horizontally placing the glass 7 to be detected on the guide rail 2, enabling the guide rail 2 to drive the glass 7 to be detected to move to the center of the detection platform 1 along the X axis under the driving of the motor set, stopping moving the guide rail 2, and fixing the glass 7 to be detected through the clamping device 8;
s13: starting a detection process, controlling the two electrodes 3 to move left and right on the Z axis and back and forth on the X axis by the translation motors 4, and controlling the two electrodes 3 to move up and down in the Y axis direction by the two translation motors 4 respectively; in this embodiment, the moving speed and the moving distance of the electrode 3 pass through the experimental test in advance, and for each model of glass to be tested, the moving speed and the moving distance in the three-dimensional space of the electrode 3 are fixed, so that the electrode can basically accurately reach the corresponding position only by ensuring that the position to be tested of the glass to be tested is fixed every time.
S14, moving the electrode 3 to two ends of the electric heating wire on the surface of the glass 7 to be measured to obtain the resistance value of the electric heating wire;
s15: comparing the resistance value of the heating wire calculated in the step S14 with the standard resistance value, checking whether the resistance fluctuation is within 3% of the standard resistance, preliminarily judging whether the heating wire on the glass surface is broken, and then continuing to the step S2.
In this embodiment, the optical detection in step S2 includes the following steps:
s21, an image acquisition stage mainly comprises the following steps:
s211: fixing the glass 7 to be tested, controlling M high-precision cameras 51 by the translation motor 4, carrying out image acquisition along the Z-axis direction, acquiring N times by each high-precision camera 51 to obtain N pictures (picture 1 and picture 2 … … picture N), and storing the pictures in a computer according to the shooting sequence;
s212: splicing the N pictures shot by each high-precision camera 51 into a large image, and entering the obtained M large images into an image processing part; releasing the memory of the N small images, and zooming each obtained large image to obtain an M zoomed outline image;
s22, an image detection stage mainly comprises the following steps:
s221: initializing all parameters, and emptying the detection result of the previous round;
s222: the detection algorithm is respectively executed on the M large graphs acquired by the M high-precision cameras 51, and the specific steps are as follows:
(a) each big image is formed by combining N images according to the shooting sequence, and a coordinate system needs to be reset;
(b) executing matching of the two template small graphs to obtain two coordinate points;
(c) calculating the connecting line angle of the coordinate points of the two templates and establishing a coordinate system;
(d) obtaining a relative coordinate system of translation and rotation of the sample picture by combining with a coordinate system obtained in a pre-made template, and establishing respective unified coordinate systems on the M large pictures in such a way;
(f) executing line width detection, namely changing the detection path and range of a preset template through the relative coordinate system in the step (d) to obtain a new path and range, acting on a detection sample graph, and calculating the line width of all the points; the method comprises the steps of broken line splitting, range generation, search line generation, a contour detection algorithm, a line width judgment algorithm, full black and full white, line brightness, noise, double peaks, multi-peak and other abnormal conditions.
(g) And (d) executing broken line detection, wherein all detection positions need to be converted by the relative coordinate system in the step (d) and then act on the sample detection large graph, then intercepting the image of the detection position, analyzing the topological structure, comparing the image with the original topological structure, and if the image is different from the original topological structure, recording the position of the area.
S223: the position coordinates of the problem area obtained in the step S222 are sorted, and repeated coordinates with similar positions are removed;
s224: because the M thumbnail large image splicing process has an overlapped part and cutting operation exists, coordinates which cannot appear in the final glass complete large image are removed according to splicing parameters;
s225: and obtaining the coordinates of the defect position in the N original images shot by each camera according to the coordinate position obtained in the step S222, and intercepting and displaying the defect partial images from the shot original images according to the coordinates so as to observe and inspect the defect partial images. Displaying all defects on the final glass full large picture;
s226: summarizing the coordinates of the defect points of the M cameras, and cutting and splicing the thumbnails obtained by each camera according to splicing parameters;
s227: the complete splicing image is subjected to convolution transformation and sharpening transformation again in order to ensure that thin lines on the thumbnail are continuously visible
S228: if the detection result has defects, the complete thumbnail image of the glass is widened, the defect image is displayed below, the complete thumbnail image is drawn in a red frame, the defect image is emptied, the complete thumbnail is displayed and kept, and the output result completes the detection and releases the memory.
Positioning of the electrodes 3:
for different types of glass 7 to be tested, hundreds of groups of related data are stored in the testing stage, including the position of the clamping device 8, the moving speed of the electrode 3, the moving distance of the electrode 3 in a three-dimensional space, the resistance value of standard glass and the like. In the detection process, the pre-stored template parameters need to be extracted.
The utility model discloses a glass surface line defect rapid detection device adopts a large amount of multithread parallel operation, can effectively improve the detection speed, in the image acquisition and detection process, releases the memory rapidly and in time, does not need large memory equipment; because the shot image is very large, the detection result is displayed in a thumbnail mode, the detection speed is improved, and the detection time is reduced; the line width detection algorithm adopts a high-precision simple optimized bottom-level gray level contour algorithm, adopts a pyramid algorithm to sample a single line search range, depends on a previous search result to narrow the search range, and jumps to detect until no defect occurs after the defect occurs. The optical detection mode has little damage to the raw materials, protects the original quality of the to-be-detected product, and the electrical detection mode is carried out in advance, which is helpful to improve the detection accuracy.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as the protection scope of the present invention.
Claims (5)
1. The device for quickly detecting the line defects on the surface of the glass is characterized by comprising a detection platform, a guide rail, a motor set, a translation mechanism and two electrodes, wherein the guide rail moves back and forth relative to an X axis of the detection platform, the motor set drives the guide rail to move, the translation mechanism is fixedly arranged at two ends of a centering position right above the detection platform, the two electrodes are fixedly arranged on the translation mechanism and move along a Z axial direction of the translation mechanism, and the detection platform is electrically connected with the translation mechanism through the two electrodes;
the glass to be detected is arranged above the guide rail and is fixed on the detection platform through a clamping device,
the optical detection mechanism is fixedly installed on the translation mechanism, two ends of the translation mechanism are respectively provided with a translation motor for driving the optical detection mechanism, and the optical detection mechanism is driven by the translation motors to move left and right along the Z axis.
2. The detection device according to claim 1, wherein the optical detection mechanism comprises a light source and M high-precision cameras fixed right above the light source, the light source and the high-precision cameras are respectively and fixedly connected with the translation mechanism through a first connecting plate and a second connecting plate, the high-precision cameras move along the Z-axis direction under the driving of the translation mechanism, and the M high-precision cameras are distributed in an array; the translation mechanism drives the high-precision camera array to translate and sequentially acquire the images of the glass to be detected.
3. The inspection device of claim 2, wherein the M high-precision cameras are uniformly arranged on the translation mechanism along the Y-axis direction.
4. The test device of claim 1, wherein there are 6 of the clamping devices.
5. The apparatus of claim 1, wherein the electrodes have leads connected to a resistance tester housing for testing the resistance of the glass surface thermal leads.
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| CN201920931060.3U CN211014597U (en) | 2019-06-20 | 2019-06-20 | Glass surface line defect rapid detection device |
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| CN201920931060.3U CN211014597U (en) | 2019-06-20 | 2019-06-20 | Glass surface line defect rapid detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110376475A (en) * | 2019-06-20 | 2019-10-25 | 浙江四点灵机器人股份有限公司 | Glass surface line defct device for fast detecting and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110376475A (en) * | 2019-06-20 | 2019-10-25 | 浙江四点灵机器人股份有限公司 | Glass surface line defct device for fast detecting and method |
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