CN110793454A - Device and method for detecting plug jack depth by laser - Google Patents
Device and method for detecting plug jack depth by laser Download PDFInfo
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- CN110793454A CN110793454A CN201911063839.9A CN201911063839A CN110793454A CN 110793454 A CN110793454 A CN 110793454A CN 201911063839 A CN201911063839 A CN 201911063839A CN 110793454 A CN110793454 A CN 110793454A
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- laser
- plastic shell
- depth
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/22—Measuring arrangements characterised by the use of optical techniques for measuring depth
Abstract
The invention discloses a device and a method for detecting plug jack depth by laser, which comprises a detection platform, a bracket and a measuring mechanism, wherein the bracket is fixed at one end of the detection platform, and the top of the bracket is connected with a transverse plate; the measuring mechanism comprises a linear laser generator, a camera and a workpiece to be measured, the camera is obliquely and fixedly installed on one side, close to the support, of the transverse plate, the linear laser generator is installed on the transverse plate, the workpiece to be measured comprises a plastic shell and a base, jacks which are regularly arranged are arranged on the plastic shell, and the plastic shell is fixed on the base; the linear laser generator and the workpiece to be measured keep relative movement; the camera control system further comprises a control mechanism, wherein the control mechanism is connected with the camera and comprises a storage module and a data processing module. The device provided by the invention has the advantages of simple structure, operability of the detection method, strong practicability and reasonable measurement precision, and can be used for simply, quickly, timely, effectively and automatically measuring whether the insertion depth of the plug inserted into the plastic shell is qualified or not at low cost.
Description
Technical Field
The invention relates to a device and a method for detecting plug jack depth by laser, belonging to the technical field of laser detection.
Background
In the wire harness processing industry, a wire harness product needs to be connected with each other by inserting a wire cable into a connecting hole of a plastic shell, and an unused hole position in the connecting hole of the plastic shell needs to be inserted into the connecting hole by using a plug so as to play an insulating role. Existing plug plugs are typically plugged automatically using a blind plugging machine and have certain requirements for the depth of the plug inserted to ensure product quality. Because the blind plugging machine is high in plug inserting speed and the size of the plastic shell is small, a simple, quick, effective, low-cost and reasonable-precision testing method and device are needed to timely detect the depth of the plug inserted into the plastic shell and determine whether the plug is qualified.
Disclosure of Invention
The purpose is as follows: in order to overcome the defects in the prior art, the invention provides a device and a method for detecting the depth of a plug jack by laser.
The technical scheme is as follows: in order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a device for detecting the depth of a plug jack by laser comprises a detection platform, a bracket and a measuring mechanism, wherein the bracket is fixed at one end of the detection platform, and the top of the bracket is connected with a transverse plate;
the measuring mechanism comprises a linear laser generator, a camera and a workpiece to be measured, the camera is fixedly arranged on one side of the transverse plate close to the bracket, and a shooting lens of the camera faces towards the workpiece to be measured; the linear laser generator is arranged on the transverse plate, the workpiece to be measured comprises a plastic shell and a base, the plastic shell is provided with jacks which are regularly arranged, and the plastic shell is fixed on the base; the linear laser generator and the workpiece to be detected can move relatively, and the workpiece to be detected is always within the visual range of the camera;
the camera control system further comprises a control mechanism, wherein the control mechanism is connected with the camera and comprises a storage module and a data processing module.
Preferably, the linear laser generator is arranged on one side of the transverse plate far away from the bracket and is kept immovable; the workpiece to be detected is connected with the detection platform in a sliding mode.
Preferably, a slide rail is arranged on the detection platform, and the slide rail is parallel to the transverse plate; the lower surface of the base is provided with a groove matched with the slide rail, the groove is connected with the slide rail in an embedded mode, and the base drives the plastic shell to move along the slide rail.
Preferably, the measuring workpiece is placed on the detection platform and fixed, and the linear laser generator is connected with the transverse plate in a sliding mode.
Preferably, the upper end of the linear laser generator is connected with a sliding block, a sliding groove matched with the sliding block is formed in the transverse plate, the sliding block is connected with the sliding groove in a nested mode, and the sliding block drives the linear laser generator to move along the sliding groove.
Preferably, the control mechanism is a single chip microcomputer.
A method for detecting the depth of a plug jack by laser is carried out on the basis of the device and comprises the following steps:
image acquisition: inserting a plug into a part of jack of the plastic shell; the linear laser generator emits linear laser and irradiates the plastic shell, and when the linear laser irradiates the central line of a row of jacks of the plastic shell, the camera shoots the plastic shell image at the moment and uploads the plastic shell image to the control mechanism;
data processing: the controller receives the image, transmits the image data to the data processing module for processing, and then stores the original image and the processing result in the storage module; the image data processing procedure is as follows,
(1) pretreatment: cutting an original image, and keeping a laser-irradiated plastic shell part;
(2) extraction of red channel: extracting the red of the laser in the RGB three channels of the original color of the original image, and finding out the position of the red laser image to the maximum extent;
(3) binarization: converting a gray image of a red channel into a pure black and white image, setting a threshold value before conversion, converting parts of RGB which are larger than the threshold value into pure white, and converting parts of RGB which are smaller than the threshold value into pure black;
(4) expansion treatment: zooming the binarized figure outline;
(5) filtering small miscellaneous blocks: removing the graphs with the width and the height smaller than a certain value in the laser projection line;
(6) projection drawing, height finding: and (4) projecting the laser line obtained after the processing in the steps (1) to (5) to a coordinate system with a Y axis as a pixel value and an X axis as a horizontal axis of the image to obtain a pixel height corresponding to the laser projection line, and further judging whether the plug jack depth is qualified.
Preferably, the state when the plug is inserted into the plastic shell jack and reaches the specified standard depth is a standard state, the plastic shell image is collected in the standard state and is processed in the steps (1) - (6), the standard pixel height is obtained, the maximum allowable error range is set, and the standard pixel height value and the maximum allowable error range value are stored in the storage module of the control mechanism.
Preferably, the pixel height detected by the method is compared with a standard pixel height, and if the error value is within the maximum allowable error range, the plug jack depth is qualified, otherwise, the plug jack depth is unqualified.
Has the advantages that: the device for detecting the plug jack depth by laser provided by the invention has the advantages of simple structure, operability of the detection method, strong practicability and reasonable measurement precision, and can be used for simply, quickly, timely, effectively and automatically measuring whether the plug jack depth inserted into a plastic shell is qualified or not at low cost.
Drawings
FIG. 1 is a schematic diagram of the apparatus of the present invention;
FIG. 2 is a schematic view of a plastic housing structure after a plug is inserted;
FIG. 3 is an original image captured by a camera according to an embodiment;
FIG. 4 is a diagram illustrating an embodiment of pre-processing a cropped image;
FIG. 5 is a diagram illustrating an image after processing of extracting a red color channel according to an embodiment;
FIG. 6 is a block diagram of an image after a binarization process according to an embodiment;
FIG. 7 is an image after the dilation process of an embodiment;
FIG. 8 is an image after filtering small clutter blocks according to an embodiment;
FIG. 9 is a coordinate image of a laser line projected into a coordinate system according to one embodiment.
Detailed Description
The present invention will be further described with reference to the following examples and the accompanying drawings.
Example one
As shown in FIGS. 1 and 2, the device for detecting the depth of the plug jack by laser comprises a detection platform 1, a support 2 and a measuring mechanism, wherein the support 2 is fixed at one end of the detection platform 1, and the top of the support 2 is connected with a transverse plate 4.
Measuring mechanism includes line type laser generator 5, camera 3 and the work piece that awaits measuring, 3 fixed mounting of camera are in one side that diaphragm 4 is close to support 2, and the work piece that awaits measuring is awaited measuring to the camera lens orientation of camera, is certain contained angle between camera 3 and the diaphragm 4. The linear laser generator 5 is installed on the transverse plate, the workpiece to be measured comprises a plastic shell 7 and a base 8, the plastic shell 7 is provided with jacks which are regularly arranged, and the plastic shell 7 is fixed on the base 8; linear laser generator 5 and workpiece to be measured between can relative movement, and the removal in-process, the workpiece to be measured is in camera 3's visual scope all the time, and camera 3 can shoot the image that laser shines on moulding the shell all the time promptly.
The linear laser generator 5 is fixedly arranged on one side of the transverse plate 4 far away from the bracket 2 and is fixed; the workpiece to be detected is connected with the detection platform 1 in a sliding manner.
Specifically, a slide rail is arranged on the detection platform 1, and the slide rail is parallel to the transverse plate 4; the lower surface of the base 8 is provided with a groove matched with the slide rail, the groove is connected with the slide rail in a nested manner, and the base 8 drives the plastic shell 7 to move along the slide rail, so that the workpiece to be measured and the linear laser generator 5 move relatively.
The device also comprises a control mechanism, wherein the control mechanism is connected with the camera 3 and comprises a storage module and a data processing module. The control mechanism and the camera 3 can transmit signals in a wireless transmission mode, and can also transmit signals through wired data line connection. The control mechanism adopts a single chip microcomputer which can be purchased in the market and can also be directly replaced by a computer.
A method for detecting the depth of a plug jack by laser is carried out based on the device and comprises the following processes:
image acquisition: a plug is inserted into a part of the insertion hole of the plastic shell 7; the linear laser generator 5 emits linear laser and irradiates the plastic shell, and when the linear laser irradiates the central line of a row of jacks of the plastic shell, the camera shoots the plastic shell image at the moment and uploads the plastic shell image to the control mechanism;
data processing: the controller receives the image, transmits the image data to the data processing module for processing, and then stores the original image and the processing result in the storage module; the image data processing procedure is as follows,
(1) pretreatment: cutting an original image, keeping a laser-irradiated plastic shell part, and adjusting an image angle to display a vertical view of a plastic shell jack, wherein the original image is shown in fig. 3, and the preprocessed image is shown in fig. 4;
(2) extraction of red channel: extracting the red of the laser in the original color RGB three channels of the original image, and finding out the position of the red laser image to the maximum extent, as shown in FIG. 5;
(3) binarization: converting the gray image of the red channel into a pure black-white image, wherein the R, G, B value of the gray image is equal to 0-255, excluding 0 and 255, a threshold is set before conversion, the part of RGB which is greater than the threshold is converted into pure white, the R, G, B value is 255, the part of RGB which is less than the threshold is converted into pure black, and the R, G, B value is 0, as shown in FIG. 6;
(4) expansion treatment: scaling the binarized figure outline as shown in fig. 7;
(5) filtering small miscellaneous blocks: removing the graphs with the width and the height smaller than a certain value in the laser projection line, as shown in fig. 8;
(6) projection drawing, height finding: projecting the laser line obtained after the processing in the steps (1) to (5) to a coordinate system with a Y axis as a pixel value and an X axis as a horizontal axis of the image, obtaining a pixel height corresponding to the laser projection line as shown in fig. 9, and further judging whether the plug jack depth is qualified.
Defining the state of the plug inserted into the plastic shell jack and reaching the specified standard depth as a standard state, acquiring a plastic shell image in the standard state, processing the plastic shell image in the steps (1) to (6) to obtain the standard pixel height, setting the maximum allowable error range, and storing the standard pixel height value and the maximum allowable error range value in a storage module of a control mechanism.
The pixel height detected by the method is compared with the standard pixel height, if the error value is within the maximum allowable error range, the plug jack depth is qualified, otherwise, the plug jack depth is unqualified.
Example two
The utility model provides a device of laser detection stopper jack degree of depth, includes testing platform 1, support 2 and measuring mechanism, support 2 is fixed in testing platform 1's one end, and diaphragm 4 is connected at 2 tops of support.
Measuring mechanism includes line type laser generator 5, camera 3 and the work piece that awaits measuring, 3 fixed mounting of camera are in one side that diaphragm 4 is close to support 2, and the work piece that awaits measuring is awaited measuring to the camera lens orientation of camera, is certain contained angle between camera 3 and the diaphragm 4. The workpiece to be measured comprises a plastic shell 7 and a base 8, the plastic shell 7 is provided with jacks which are regularly arranged, and the plastic shell 7 is fixed on the base 8; the workpiece to be detected is placed on the detection platform 1 and fixed, and the linear laser generator 5 is connected with the transverse plate 4 in a sliding mode. Linear laser generator 5 and workpiece to be measured between can relative movement, and the removal in-process, the workpiece to be measured is in camera 3's visual scope all the time, and camera 3 can shoot the image that laser shines on moulding the shell all the time promptly.
Specifically, 5 upper end connection sliders of line type laser generator, set up the spout that matches with the slider on the diaphragm 4, slider and spout nested connection, slider drive line type laser generator 5 and remove along the spout.
The other structures are the same as those of the first embodiment, and the method for detecting the depth of the plug jack by using the device provided by the second embodiment is also the same as that of the first embodiment, so that the details are not repeated herein.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (9)
1. The utility model provides a device of stopper jack depth is detected to laser which characterized in that: the device comprises a detection platform, a bracket and a measuring mechanism, wherein the bracket is fixed at one end of the detection platform, and the top of the bracket is connected with a transverse plate;
the measuring mechanism comprises a linear laser generator, a camera and a workpiece to be measured, the camera is fixedly arranged on one side of the transverse plate close to the bracket, and a shooting lens of the camera faces towards the workpiece to be measured; the linear laser generator is arranged on the transverse plate, the workpiece to be measured comprises a plastic shell and a base, the plastic shell is provided with jacks which are regularly arranged, and the plastic shell is fixed on the base; the linear laser generator and the workpiece to be detected can move relatively, and the workpiece to be detected is always within the visual range of the camera;
the camera control system further comprises a control mechanism, wherein the control mechanism is connected with the camera and comprises a storage module and a data processing module.
2. The laser device for detecting the depth of the plug inserting hole according to claim 1, wherein: the linear laser generator is arranged on one side of the transverse plate far away from the bracket and is kept fixed; the workpiece to be detected is connected with the detection platform in a sliding mode.
3. The apparatus for laser detecting the depth of the plug insertion hole according to claim 2, wherein: the detection platform is provided with a slide rail, and the slide rail is parallel to the transverse plate; the lower surface of the base is provided with a groove matched with the slide rail, the groove is connected with the slide rail in an embedded mode, and the base drives the plastic shell to move along the slide rail.
4. The laser device for detecting the depth of the plug inserting hole according to claim 1, wherein: the measuring workpiece is placed on the detection platform and fixed, and the linear laser generator is connected with the transverse plate in a sliding mode.
5. The apparatus for laser detecting the depth of the plug hole according to claim 4, wherein: the upper end of the linear laser generator is connected with a sliding block, a sliding groove matched with the sliding block is formed in the transverse plate, the sliding block is connected with the sliding groove in an embedded mode, and the sliding block drives the linear laser generator to move along the sliding groove.
6. The laser device for detecting the depth of the plug inserting hole according to claim 1, wherein: the control mechanism is a single chip microcomputer.
7. A method for detecting the depth of a plug jack by laser is characterized in that: the method is carried out based on the device of any one of claims 1 to 6, and comprises the following processes:
image acquisition: inserting a plug into a part of jack of the plastic shell; the linear laser generator emits linear laser and irradiates the plastic shell, and when the linear laser irradiates the central line of a row of jacks of the plastic shell, the camera shoots the plastic shell image at the moment and uploads the plastic shell image to the control mechanism;
data processing: the controller receives the image, transmits the image data to the data processing module for processing, and then stores the original image and the processing result in the storage module; the image data processing procedure is as follows,
(1) pretreatment: cutting an original image, and keeping a laser-irradiated plastic shell part;
(2) extraction of red channel: extracting the red of the laser in the RGB three channels of the original color of the original image, and finding out the position of the red laser image to the maximum extent;
(3) binarization: converting a gray image of a red channel into a pure black and white image, setting a threshold value before conversion, converting parts of RGB which are larger than the threshold value into pure white, and converting parts of RGB which are smaller than the threshold value into pure black;
(4) expansion treatment: zooming the binarized figure outline;
(5) filtering small miscellaneous blocks: removing the graphs with the width and the height smaller than a certain value in the laser projection line;
(6) projection drawing, height finding: and (4) projecting the laser line obtained after the processing in the steps (1) to (5) to a coordinate system with a Y axis as a pixel value and an X axis as a horizontal axis of the image to obtain a pixel height corresponding to the laser projection line, and further judging whether the plug jack depth is qualified.
8. The method of claim 7, wherein the laser detecting the depth of the plug hole comprises: and (3) when the plug is inserted into the plastic shell jack and reaches the specified standard depth, the state is a standard state, a plastic shell image is collected in the standard state and is processed in the steps (1) to (6), the standard pixel height is obtained, the maximum allowable error range is set, and the standard pixel height value and the maximum allowable error range value are stored in a storage module of the control mechanism.
9. The method of claim 8, wherein the laser detecting the depth of the plug hole comprises: and comparing the pixel height detected by the method with the standard pixel height, wherein if the error value is within the maximum allowable error range, the plug jack depth is qualified, and otherwise, the plug jack depth is unqualified.
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| CN201911063839.9A CN110793454A (en) | 2019-11-04 | 2019-11-04 | Device and method for detecting plug jack depth by laser |
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| CN201911063839.9A CN110793454A (en) | 2019-11-04 | 2019-11-04 | Device and method for detecting plug jack depth by laser |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112683190A (en) * | 2020-10-27 | 2021-04-20 | 广东奥普特科技股份有限公司 | Transparent body built-in object depth detection method and detection system thereof |
| CN114322820A (en) * | 2021-12-27 | 2022-04-12 | 烟台博昌汽车标准件有限公司 | Fastener hole degree of depth detects frock |
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Application publication date: 20200214 |
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