CN211346710U - A measuring device for PCB board electrical safety distance - Google Patents
A measuring device for PCB board electrical safety distance Download PDFInfo
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- CN211346710U CN211346710U CN201922380150.0U CN201922380150U CN211346710U CN 211346710 U CN211346710 U CN 211346710U CN 201922380150 U CN201922380150 U CN 201922380150U CN 211346710 U CN211346710 U CN 211346710U
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Abstract
The utility model relates to a measuring device for PCB board electric safety distance, it is including measuring camera, lighting system, imaging system, measurement system, computer processing system to and set up in the inside hardware platform of computer processing system. During measurement, a device of a measured circuit board on a camera platform is collected through a measuring camera and an imaging system to obtain two-dimensional images to obtain measurement information, and then the measurement information collected through a hardware platform is processed through a computer processing system to complete measurement of the electrical safety distance of the circuit board. Compared with a three-dimensional image measuring method in the prior art, the measuring device can realize the automation of the electrical safety distance measurement of the circuit board, does not need manual operation, is favorable for improving the overall quality of the circuit board, and also improves the accuracy of measured data and the efficiency of the electrical safety distance measurement.
Description
Technical Field
The utility model relates to a PCB board measures technical field's a measuring device that is used for PCB board electric safety distance.
Background
In recent years, with the rapid development of science and technology, human life has entered a high-speed information age. Due to the increasing demand for information, the demand for information transmission is also increasing, and at the same time, the PCB is widely used in various electronic products. In the process engineering of printed circuit board, a plurality of devices soldered on the circuit board are connected with each other. Therefore, the accuracy of the measurement must be ensured during the measurement, and the device to be measured must be separated from other devices to be measured. However, in the conventional measurement method, the components fixed on the printed circuit board are generally taken out of the printed circuit board, and the printed circuit board is mounted again after the measurement is completed. Although the distance between the devices can be effectively measured by the method, the overall quality of the measured circuit board is affected, and the numerical accuracy of the measured data is low.
Disclosure of Invention
In view of this, the technical problem to be solved of the present invention is to provide a measuring device for PCB board electrical safety distance, which not only can improve the overall quality of the circuit board, but also can improve the accuracy of the measured data.
Therefore, the technical solution of the present invention is to provide a measuring device for electrical safety distance of PCB board, which comprises a measuring camera, a lighting system, an imaging system, a measuring system, a computer processing system, and a hardware platform disposed inside the computer processing system; the illumination system is connected with the computer processing system, the measuring camera is connected with the imaging system, the imaging system is connected with the measuring system, and the measuring system is connected with the computer processing system; the imaging system is interconnected with a computer processing system; the measuring system comprises a detected device, a camera platform for placing the device, and a light source bracket arranged near the camera platform; the lighting system comprises a plurality of light sources arranged in different directions, and each light source is an LED lamp.
Further defined, the measuring camera comprises an industrial camera, and an industrial lens disposed at a front end of the industrial camera; the model of the industrial camera is AVT Guppy PRO F-503B, the industrial lens is formed by a zoom industrial lens of Japan computer company, the focal length of the zoom industrial lens is 2-36 mm, the maximum imaging size is 8.8X6.6 in diameter; the aperture range is F2.8 to F16C, and the minimum object distance is 0.2 m/0.05 m.
Further, the hardware platform comprises an image preprocessing module, a first measuring module and a second measuring module, wherein the first measuring module is connected with the image preprocessing module and used for measuring the distance of the electric gap between the conducting wires, and the second measuring module is used for measuring the distance of the electric gap between the pins and the creepage.
Further defined, the lighting system further comprises an incandescent lamp, a fluorescent lamp, and an LED chip.
The utility model has the advantages of: because of this technical scheme adopts measuring camera, lighting system, imaging system, measurement system, computer processing system to and set up in the inside hardware platform of computer processing system and constitute measuring device, during the measurement, earlier through measuring camera and imaging system gather the device of the measured circuit board above the camera platform and carry out two-dimensional image and acquire measurement information, then, the measurement information of gathering through the hardware platform is handled through computer processing system, accomplishes the measurement to circuit board electrical safety distance. Compared with a three-dimensional image measuring method in the prior art, the measuring device can realize the automation of the electrical safety distance measurement of the circuit board, does not need manual operation, is favorable for improving the overall quality of the circuit board, and also improves the accuracy of measured data and the efficiency of the electrical safety distance measurement.
The technical solution of the present invention will be described in further detail with reference to the accompanying drawings and embodiments.
[ description of the drawings ]
Fig. 1 is a schematic view of an electrical safety distance measuring device for a PCB of the present invention;
FIG. 2 is a schematic diagram of the hardware platform of the present invention;
fig. 3 is a flow chart of the measuring device of the present invention.
[ detailed description ] embodiments
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention clearer and more obvious, the following description of the present invention with reference to the accompanying drawings and embodiments is provided for further details. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Referring to fig. 1 to 3, an embodiment of a measuring apparatus for an electrical safety distance of a PCB board is described below, which includes a measuring camera, an illumination system, an imaging system, a measuring system, a computer processing system, and a hardware platform disposed inside the computer processing system. The illumination system is connected with the computer processing system, the measuring camera is connected with the imaging system, the imaging system is connected with the measuring system, and the measuring system is connected with the computer processing system; the imaging system is interconnected with a computer processing system.
The lighting system comprises a plurality of light sources arranged in different directions, and each light source is an LED lamp. The lighting system further comprises an incandescent lamp, a fluorescent lamp and an LED wafer. The lighting system mainly comprises light source type selection and lighting mode selection. The lighting system mainly has the functions of lighting a measured device and enabling the measured device to have larger contrast with a background, so that the subsequent measurement data can be conveniently acquired, and the interference of other factors can be reduced. In the embodiment, the light source in the lighting system uses the characteristics of long service life, green energy conservation and stable brightness of the LED lamp, and generally, the LED lamp is mostly selected. The distance between the measuring camera and the measuring device is divided into forward illumination and backward illumination according to the light source. The back illumination is a measurement of the transparent device or a measurement of the device edge. In order to improve the illumination brightness requirement, the illumination system is connected with the controller, and the intensity of the light source is correspondingly adjusted according to the requirement of the tested device.
The measuring system comprises a detected device, a camera platform for placing the device, and a light source bracket placed near the camera platform. The camera platform can carry out certain adjustment to the angle of zooming industry camera to camera platform can go up and down, and the lifting range is between 0-800 millimeters. And the three support racks can be adjusted in height.
The measuring camera comprises an industrial camera and an industrial lens arranged at the front end of the industrial camera; the model of the industrial camera is AVT Guppy PRO F-503B, and the industrial camera has the characteristics of high transmission speed, high resolution, light weight and the like. The industrial lens is composed of a zoom industrial lens of Japan computer company, the focal length of the zoom industrial lens is 2-36 mm, and the maximum imaging size is 8.8X6.6 in diameter; the aperture range is F2.8 to F16C, and the minimum object distance is 0.2 m/0.05 m.
The hardware platform comprises an image preprocessing module, a first measuring module and a second measuring module, wherein the first measuring module is connected with the image preprocessing module and used for measuring the distance of the electric gap between the conducting wires, and the second measuring module is used for measuring the distance of the electric gap between the pins and the gap between creepage. And the hardware platform is arranged in the computer processing system, and the information acquired by the hardware platform is processed by a computer software system to finally complete the measurement of the electrical safety distance of the circuit board. During measurement, the image preprocessing module reduces noise in the process of acquiring the zooming industrial camera through a smoothing algorithm of software, but certain processing is carried out on the imaging quality after the smoothing algorithm is used, certain enhancement processing is carried out on the image after noise reduction is carried out, and therefore the texture of the image is improved.
The measurement of the electrical gap between the two wires is to calculate the shortest distance between the two wires of the device under test, and in the calculation process, the electrical gap between the two wires represents the shortest distance between the two wires. In the calculation process, a target area is selected firstly, then the conducting wires in the target area are identified, then the guide is separated in a copper plating separation mode, and finally the distance of the conducting wires is calculated. The whole measurement process mainly comprises wire identification, wire separation and wire minimum spacing calculation. The measurement of the electric clearance and the creepage distance between the pins needs to image the device to be measured and the image of the welding disc surface respectively, collect the relevant data, make the data (between the pixel) between the two images correspond to each other one by one through the geometric registration, and after the pixel correspondence is ensured, calculate the electric clearance and the creepage distance between the pins according to the data.
Compared with an image measuring method, the circuit board electrical safety distance measuring device has the characteristic of high quality in image acquisition. Compared with the three-dimensional model, the time consumption is short, and the image presentation is fast. Compared with the manual approximation rule, the method has the characteristic of high measurement accuracy. The measuring device can realize the automation of the electrical safety distance measurement of the circuit board, does not need manual operation, is favorable for improving the overall quality of the circuit board, and also improves the accuracy of measured data and the efficiency of the electrical safety distance measurement.
The electric safety distance measuring device for the circuit board is improved on the basis of common methods such as a three-dimensional model measuring method, an artificial approximate measuring method and an image measuring method, a visual detection method is adopted to measure a device, an illumination system, an illumination method, an industrial camera and an imaging system are adopted to assemble, so that an image of a PBC device is obtained, and then image preprocessing, groove recognition and the like are used for calculating the creepage distance and the electric clearance of the PBC.
In summary, according to the technical scheme, the measuring device is composed of the measuring camera, the illuminating system, the imaging system, the measuring system, the computer processing system and the hardware platform arranged in the computer processing system, during measurement, two-dimensional images of a device of a measured circuit board on the camera platform are collected through the measuring camera and the imaging system to obtain measuring information, and then the measuring information collected through the hardware platform is processed through the computer processing system to complete measurement of the electrical safety distance of the circuit board. Compared with a three-dimensional image measuring method in the prior art, the measuring device can realize the automation of the electrical safety distance measurement of the circuit board, does not need manual operation, is favorable for improving the overall quality of the circuit board, and also improves the accuracy of measured data and the efficiency of the electrical safety distance measurement.
The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, without thereby limiting the scope of the invention. Any modification, equivalent replacement and improvement made by those skilled in the art without departing from the scope and spirit of the present invention should be within the scope of the claims of the present invention.
Claims (4)
1. A measuring device for PCB electrical safety distance comprises a measuring camera, an illuminating system, an imaging system, a measuring system, a computer processing system and a hardware platform arranged in the computer processing system; the method is characterized in that: the illumination system is connected with the computer processing system, the measuring camera is connected with the imaging system, the imaging system is connected with the measuring system, and the measuring system is connected with the computer processing system; the imaging system is interconnected with a computer processing system; the measuring system comprises a detected device, a camera platform for placing the device, and a light source bracket arranged near the camera platform; the lighting system comprises a plurality of light sources arranged in different directions, and each light source is an LED lamp.
2. A measuring device for PCB board electrical safety distance according to claim 1, characterized in that: the measuring camera comprises an industrial camera and an industrial lens arranged at the front end of the industrial camera; the model of the industrial camera is AVTGuppy PRO F-503B, the industrial lens is formed by a zoom industrial lens of Japan computer company, the focal length of the zoom industrial lens is 2-36 mm, the maximum imaging size is 8.8X6.6 in diameter; the aperture range is F2.8 to F16C, and the minimum object distance is 0.2 m/0.05 m.
3. A measuring device for PCB board electrical safety distance according to claim 1, characterized in that: the hardware platform comprises an image preprocessing module, a first measuring module and a second measuring module, wherein the first measuring module is connected with the image preprocessing module and used for measuring the distance of the electric gap between the conducting wires, and the second measuring module is used for measuring the distance of the electric gap between the pins and the gap between creepage.
4. A measuring device for PCB board electrical safety distance according to claim 1, characterized in that: the lighting system further comprises an incandescent lamp, a fluorescent lamp and an LED wafer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922380150.0U CN211346710U (en) | 2019-12-25 | 2019-12-25 | A measuring device for PCB board electrical safety distance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922380150.0U CN211346710U (en) | 2019-12-25 | 2019-12-25 | A measuring device for PCB board electrical safety distance |
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| Publication Number | Publication Date |
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| CN211346710U true CN211346710U (en) | 2020-08-25 |
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| CN201922380150.0U Active CN211346710U (en) | 2019-12-25 | 2019-12-25 | A measuring device for PCB board electrical safety distance |
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