CN112541522A - Method for detecting pin alignment degree of communication module of electricity consumption information acquisition terminal - Google Patents
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Abstract
The invention relates to a method for detecting the pin true position of a communication module of a power utilization information acquisition terminal, which comprises the following steps: firstly, generating a 2D gray image and a 3D point cloud of a contact pin; secondly, separating an area which only comprises the tail end of the contact pin in the gray level image; thirdly, obtaining the coordinates of the circle center of each area; fourthly, judging whether the position of the contact pin meets the precision requirement or not; fifthly, generating a slot area gray level image; sixthly, obtaining coordinates of the center points of all the slots; step seven, judging whether the slot space meets the precision requirement; step eight, integrating the precision levels of the positions of the pins and the distances between the slots, and judging the pin true position condition of the communication module of the power utilization information acquisition terminal. The invention aims to detect the true position degrees of the contact pin and the slot respectively through an algorithm combining 2D gray level image processing and 3D point cloud processing technologies and a template matching algorithm of gray level value similarity, provides a more scientific and reasonable method for detecting a communication module of a power consumption information acquisition terminal, and realizes cost reduction and efficiency improvement of enterprises.
Description
Technical Field
The invention belongs to the technical field of detection of power consumption information acquisition equipment, and relates to a method for detecting pin alignment of a communication module of a power consumption information acquisition terminal.
Background
In recent years, with the rapid development of electronic technology, communication technology, control technology and computer technology, the national grid Tianjin power company develops an automatic detection system for a power consumption information acquisition terminal based on a three-phase meter automatic verification system, and realizes the automatic detection of the power consumption information acquisition terminal. As one of the important structures of the electricity consumption information acquisition terminal, each pin on the communication module has a specific physical meaning, and the accuracy of communication is directly influenced by the true position of the pin. In the production process, the actual positions of the pins and the slots of the communication module may deviate slightly from the drawing due to the limitation of the precision of the equipment. Therefore, the detection of the pin true position degree and the matching degree of the slot of the electric power remote/local communication module are important links for the automatic detection of the power utilization information acquisition terminal.
This detection operation has mainly relied on the manpower to carry out the mode completion of range estimation and plug test in the past, can't realize data calculation, analysis and statistics to the normal position degree and the uniformity of the long-range local module stitch of acquisition terminal, has influenced security and the efficiency to the long-range local communication module of acquisition terminal installation. At present, related researches introduce image processing and computer vision technologies into pin identification of electronic devices, but the used 2D gray image processing method is difficult to position pins, the 3D point cloud processing method is difficult to determine the fitting circle center, the processing calculation amount is large in engineering, and the detection method needs to be further improved.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a method for detecting the pin true position of a communication module of a power consumption information acquisition terminal.
The technical problem to be solved by the invention is realized by the following technical scheme:
a method for detecting the pin true position of a communication module of a power utilization information acquisition terminal is characterized by comprising the following steps: the method comprises the following steps:
firstly, scanning and imaging a pin of a remote/local communication module of an acquisition terminal by using a 3D line scanning camera to generate a 2D gray image and a 3D point cloud of the pin;
fusing the generated 2D gray image with the 3D point cloud, and separating an area only containing the tail end of the contact pin in the gray image;
step three, carrying out communication area analysis on the separated areas to obtain the circle center coordinates of each area;
judging whether the pin position meets the precision requirement or not according to the obtained circle center coordinates of each region;
step five, photographing a pin slot of the acquisition terminal by using a 2D camera to generate a slot area gray level image;
step six, aiming at the generated slot area gray level image, obtaining all slot center point coordinates based on a matching algorithm of gray level similarity;
judging whether the slot distance meets the precision requirement according to the coordinate of the slot center point;
step eight, integrating the precision levels of the positions of the pins and the distances between the slots, and judging the pin true position condition of the communication module of the power utilization information acquisition terminal.
Moreover, the method for fusing the 2D grayscale image with the 3D point cloud includes:
firstly, processing the 3D point cloud of the contact pin, separating the tail end of the pin from the point cloud, supposing that the height of the contact pin is L, and when the height P of the 3D point cloud is less than 0.8 times L, determining the height P of the area0Is set to 0, otherwise is set to 1, and is represented by formula (1):
and then carrying out counterpoint multiplication on the 3D point cloud subjected to the binarization processing and the 2D gray level image according to the formula (2), and separating the region I of the tail end of the contact pin from the gray level image I0：
I0＝P0×I (2)
Moreover, the method for judging whether the pin position meets the precision requirement according to the obtained circle center coordinates of each region comprises the following steps:
for the same row of pins, the distance d between adjacent pins is calculated1For two rows of pins in opposite positions, the distance d between two pins is calculated2Calling a preset standard template to compare according to the standard specification of the detected communication unit, and if d is the case1And d2And if the error between the standard template data and the standard template data is kept in a qualified area, the accuracy requirement is met, and the error is +/-0.1 mm.
Moreover, the method for obtaining all coordinates of the center point of the slot based on the matching algorithm of the gray similarity for the generated gray image of the slot area comprises the following steps:
manually marking out the slot position on the gray level image of the slot area to be used as a subsequent gray level similarity matching standard template which can be repeatedly used; and matching the template with the slot gray level image, and determining the center point coordinates of each slot according to the magnitude of the correlation coefficient.
Moreover, the method for judging whether the slot distance meets the precision requirement according to the coordinate of the slot center point comprises the following steps:
for the same row of slots, calculating adjacent slotsA distance d between3(ii) a For two rows of slots in opposite positions, calculating the distance d between two slots4(ii) a Calling a preset standard template to compare according to the standard specification of the detected communication unit, and if d is the case3And d4And if the error between the standard template data and the standard template data is kept in a qualified area, the accuracy requirement is met, and the error is +/-0.1 mm.
The invention has the advantages and beneficial effects that:
according to the method for detecting the pin alignment degree of the communication module of the power utilization information acquisition terminal, the 2D gray level image processing technology and the 3D point cloud processing technology are combined, and the mature algorithm in the 2D gray level image processing and the characteristic of easy positioning of 3D information are utilized, so that the positioning accuracy is improved, the calculated amount is reduced, and meanwhile, the stability of the algorithm is improved; when the stitch slot interval is detected, a template matching algorithm of gray value similarity is adopted, the area is manually defined only once, and the subsequent area can be repeatedly used without manual participation, so that the functional stability and the operation continuity are ensured. The detection method provided by the invention can reduce the manual visual inspection link, realize the rapid and accurate test of the remote/local communication module of the acquisition terminal, meet the requirement of production rhythm, reduce the fatigue strength of workers, improve the first-time assembly first-pass rate and the production efficiency, and provide a data sample guarantee for the big data statistical analysis of the detected equipment.
Drawings
Fig. 1 illustrates the pitch of the pins adjacent to each other in the same row in the present invention.
Fig. 2 shows the pin pitch for the relative positions of the present invention.
Fig. 3 shows the center position of the slot obtained by matching the gray level similarity in the present invention.
Detailed Description
The present invention is further illustrated by the following specific examples, which are intended to be illustrative, not limiting and are not intended to limit the scope of the invention.
Firstly, scanning and imaging the pin of the remote/local communication module of the acquisition terminal by using a 3D line scanning camera to generate a 2D gray image and a 3D point cloud of the pin.
Specifically, the power consumption information acquisition terminal communication module pin true position detection system adopts a double-sided industrial camera, a professional light source and professional image processing software, and utilizes a multithreading technology to enable acquisition, data processing and communication of multiple cameras to run in parallel so as to improve the system detection efficiency. After the module is positioned by the customized carrier, a 3D line scanning camera is used for scanning right above the contact pin to obtain a 2D gray image and a 3D point cloud of the contact pin.
And step two, fusing the 2D gray image and the 3D point cloud, and separating an area only containing the tail end of the contact pin in the gray image.
Specifically, the method for fusing the 2D gray image and the 3D point cloud includes: the 3D point cloud of the pin is first processed to separate the end of the pin from it. Assuming that the height of the contact pin is L, when the 3D point cloud height P is less than 0.8 times L, the height P of the area is calculated0Is set to 0, otherwise is set to 1, and is represented by formula (1):
and then carrying out counterpoint multiplication on the 3D point cloud subjected to the binarization processing and the 2D gray level image according to the formula (2), and separating the region I of the tail end of the contact pin from the gray level image I0：
I0＝P0×I (2)
And step three, carrying out communication area analysis on the separated areas to obtain the circle center coordinates of each area. Specifically, the area of each pin is divided through the analysis of the communicated area, the minimum circumscribed circle is fitted respectively, and the coordinates of each circle center are calculated.
And step four, judging whether the pin position meets the precision requirement according to the circle center coordinates of each region.
Specifically, for the same row (longitudinal) of pins, the distance d between adjacent pins is calculated1As shown in fig. 1; for two rows of pins in opposite positions, the distance d between every two pins is calculated2. Calling a preset standard template to compare according to the standard specification of the detected communication unit, and if d is the case1And d2And the error between the standard template data and the standard template data is kept within a qualified (+ -0.1 mm) area, so that the precision requirement is met.
And fifthly, photographing the pin slot of the acquisition terminal by using a 2D camera to generate a slot area gray level image. A lower layer upward-looking 2D camera in the electricity information acquisition terminal communication module pin rightness detection system scans and images the pin slots to generate 2D gray images.
And sixthly, aiming at the gray level image of the slot area, obtaining the coordinates of the center points of all the slots based on a matching algorithm of gray level similarity.
Specifically, on the gray image of the slot region, the slot position is manually defined and used as a gray similarity matching standard template which can be repeatedly used subsequently. The template is matched with the slot gray level image, and the coordinates of the center point of each slot are determined according to the magnitude of the correlation coefficient, as shown in fig. 3.
Judging whether the slot distance meets the precision requirement according to the coordinate of the slot center point;
specifically, for the same row (longitudinal) of slots, the distance d between adjacent slots is calculated3(ii) a For two rows of slots in opposite positions, calculating the distance d between two slots4. Calling a preset standard template to compare according to the standard specification of the detected communication unit, and if d is the case3And d4And the error between the standard template data and the standard template data is kept within a qualified (+ -0.1 mm) area, so that the precision requirement is met.
Step eight, integrating the precision levels of the positions of the pins and the distances between the slots, and judging the pin true position condition of the communication module of the power utilization information acquisition terminal.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (5)
1. A method for detecting the pin true position of a communication module of a power utilization information acquisition terminal is characterized by comprising the following steps: the method comprises the following steps:
firstly, scanning and imaging a pin of a remote/local communication module of an acquisition terminal by using a 3D line scanning camera to generate a 2D gray image and a 3D point cloud of the pin;
fusing the generated 2D gray image with the 3D point cloud, and separating an area only containing the tail end of the contact pin in the gray image;
step three, carrying out communication area analysis on the separated areas to obtain the circle center coordinates of each area;
judging whether the pin position meets the precision requirement or not according to the obtained circle center coordinates of each region;
step five, photographing a pin slot of the acquisition terminal by using a 2D camera to generate a slot area gray level image;
step six, aiming at the generated slot area gray level image, obtaining all slot center point coordinates based on a matching algorithm of gray level similarity;
judging whether the slot distance meets the precision requirement according to the coordinate of the slot center point;
step eight, integrating the precision levels of the positions of the pins and the distances between the slots, and judging the pin true position condition of the communication module of the power utilization information acquisition terminal.
2. The method for detecting the pin alignment degree of the communication module of the electricity consumption information acquisition terminal according to claim 1, wherein the method comprises the following steps: the method for fusing the 2D gray level image and the 3D point cloud comprises the following steps:
firstly, processing the 3D point cloud of the contact pin, separating the tail end of the pin from the point cloud, supposing that the height of the contact pin is L, and when the height P of the 3D point cloud is less than 0.8 times L, determining the height P of the area0Is set to 0, otherwise is set to 1, and is represented by formula (1):
and then carrying out counterpoint multiplication on the 3D point cloud subjected to the binarization processing and the 2D gray level image according to the formula (2), and separating the region I of the tail end of the contact pin from the gray level image I0：
I0＝P0×I (2)
3. The method for detecting the pin alignment degree of the communication module of the electricity consumption information acquisition terminal according to claim 1, wherein the method comprises the following steps: the method for judging whether the pin position meets the precision requirement according to the obtained circle center coordinates of each region comprises the following steps:
for the same row of pins, the distance d between adjacent pins is calculated1For two rows of pins in opposite positions, the distance d between two pins is calculated2Calling a preset standard template to compare according to the standard specification of the detected communication unit, and if d is the case1And d2And if the error between the standard template data and the standard template data is kept in a qualified area, the accuracy requirement is met, and the error is +/-0.1 mm.
4. The method for detecting the pin alignment degree of the communication module of the electricity consumption information acquisition terminal according to claim 1, wherein the method comprises the following steps: the method for obtaining all coordinates of the center point of the slot based on the matching algorithm of the gray similarity aiming at the generated gray image of the slot area comprises the following steps:
manually marking out the slot position on the gray level image of the slot area to be used as a subsequent gray level similarity matching standard template which can be repeatedly used; and matching the template with the slot gray level image, and determining the center point coordinates of each slot according to the magnitude of the correlation coefficient.
5. The method for detecting the pin alignment degree of the communication module of the electricity consumption information acquisition terminal according to claim 1, wherein the method comprises the following steps: the method for judging whether the slot distance meets the precision requirement or not according to the coordinates of the slot central point comprises the following steps:
for the same row of slots, calculating adjacent slotsA distance d between3(ii) a For two rows of slots in opposite positions, calculating the distance d between two slots4(ii) a Calling a preset standard template to compare according to the standard specification of the detected communication unit, and if d is the case3And d4And if the error between the standard template data and the standard template data is kept in a qualified area, the accuracy requirement is met, and the error is +/-0.1 mm.
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