CN116500424B - A PCB detection device - Google Patents

Abstract

This application relates to a PCB testing device, which includes an assembly workbench, an installation bracket, a test station mechanism, an accuracy check mechanism, a detection mechanism and a control system. The installation bracket and the test station mechanism are set on the assembly workbench, and the test station mechanism is The positioning mechanism includes an electric rotary table, an assembly plate and a screw assembly. The electric rotary table is set on the slider of the screw assembly; the assembly plate is set on the rotation plane of the electric rotary table for placing the PCB; the accuracy calibration mechanism and the detection mechanism Set on the mounting bracket. The test station mechanism slides the PCB under the accuracy calibration mechanism and detection mechanism. The accuracy calibration mechanism and detection mechanism perform accuracy calibration and detection on the PCB to improve the probe measurement of the test equipment when there is an error in the PCB placement position. The test points of the pressure and PCB are not aligned, resulting in the inability to accurately measure the performance of the PCB.

Description

A PCB detection device

Technical field

The present application relates to the field of detection devices, and in particular, to a PCB detection device.

Background technique

PCB is a very important part of modern electronic technology. PCB is made of conductive materials. There are many electronic components on it, such as resistors, capacitors, diodes, etc. These components are connected together according to specific circuit patterns. This kind of Connections are usually made in the form of wire jumpers or wire printing. During the PCB manufacturing process, the PCB needs to be inspected to ensure its quality and reliability.

Among related technical means, the PCB is tested using electrical testing. The PCB is installed on the test station of the test equipment, and then the corresponding test points on the motherboard and its expansion card are directly detected through the probes of the test equipment. The needle injects a signal into the circuit board and then detects the electrical signal on the output. This test can detect abnormal open circuits, short circuits, incorrect vertical spacing, continuity, resistance values, and capacitance values.

In view of the above technical solution, the automatic detection of PCB is realized through the probe of the test equipment. However, after the PCB is installed in the test station of the test equipment, due to the non-adjustable test station, when there is an error in the position of the PCB, it will It appears that the probe measurement pressure of the test equipment is not aligned with the test points of the PCB, resulting in the inability to accurately measure the performance of the PCB.

Contents of the invention

The purpose of the present invention is to provide a PCB detection device, aiming to solve the problems existing in the existing technology.

This application provides a PCB detection device that adopts the following technical solution:

A PCB testing device, including an assembly workbench, an installation bracket, a test station mechanism, an accuracy check mechanism, a detection mechanism and a control system. The installation bracket and the test station mechanism are arranged on the end surface of the assembly workbench. , the test station mechanism includes an electric rotating table, an assembly plate and a screw assembly. The electric rotating table is arranged on the slider of the screw assembly, and the assembly plate is arranged on the rotation plane of the electric rotating table. , the assembly plate is used to place the PCB; the accuracy check mechanism and the detection mechanism are arranged on the installation bracket; the control system is used to control the test station mechanism to slide the PCB on the assembly plate to Below the accuracy check mechanism and the detection mechanism, it is also used to control the accuracy check mechanism to perform accuracy check on the PCB on the assembly board, and to control the detection mechanism to detect the PCB on the assembly board. PCB; the accuracy verification mechanism includes a shooting camera, a camera bracket and a lighting lamp, the camera bracket is arranged on the mounting bracket, the shooting camera is arranged on the camera bracket, and the lighting lamp is arranged on At the shooting end of the shooting camera, it is fixed on the camera bracket; the detection mechanism includes a movable component, a detection probe, a support plate and a detection cylinder, the detection probe is arranged on the movable component, the The movable component is slidably arranged on the mounting bracket; the support plate is located above the movable component and is fixed on the mounting bracket; the detection cylinder is arranged on the support plate; the detection cylinder piston passes through the The support plate is connected to the movable component; an extension block is provided on the slider of the screw assembly, and an angle sensor is provided on the assembly plate and the extension block. The angle sensor is used to control the assembly plate. The angle of rotation.

As a preferred solution, the movable assembly includes a guide rail, a guide slider, a connecting block and a probe fixing plate, the guide rail is provided on the installation bracket, and the guide slider is slidably provided on the guide rail; The piston of the detection cylinder is connected to the probe fixing plate, one end of the connecting block is connected to the probe fixing plate, the other end of the connecting block is connected to the guide slider, and the detection probe is arranged on the The probe fixing plate.

As a preferred solution, a height sensor is provided on the probe fixing plate and the mounting bracket, and the height sensor is used to control the sliding height of the probe fixing plate.

As a preferred solution, a distance measuring sensor is provided on the screw assembly slider and on the assembly workbench, and the distance measuring sensor is used to control the sliding distance of the screw assembly slider.

As a preferred solution, a protective box is provided on the top of the assembly workbench, and a picture display module is provided on the side of the protective box.

As a preferred solution, a console is provided on the lower end of the assembly workbench, and the control system is provided in the console.

As a preferred solution, a universal wheel is provided below the console, and the universal wheel is used for transporting the detection device.

Compared with the existing technology, this application has the following beneficial effects: the test station is adjustable and the PCB detection accuracy is high. By placing the PCB on the assembly plate, and the assembly plate is set on the rotation plane of the electric rotary table, when the accuracy calibration mechanism checks the PCB, the electric rotary table receives the error that needs to be calibrated, so that the rotating platform of the electric rotary table The PCB is driven to perform angle compensation, and the test station mechanism then transmits the PCB to the bottom of the detection mechanism, allowing the detection mechanism to detect the PCB, thus improving the non-adjustable nature of the test station. When there is an error in the placement of the PCB, there will be errors in the test equipment. The probe measurement pressure is not aligned with the test points of the PCB, resulting in the inability to accurately measure the performance of the PCB.

Description of drawings

Figure 1 is a partial structural schematic diagram of a PCB detection device in an embodiment of the present application;

Figure 2 is a schematic rear view of a PCB detection device in an embodiment of the present application;

Figure 3 is a partial enlarged view of part "A" in Figure 2;

Figure 4 is a partial enlarged view of part "B" in Figure 2;

Figure 5 is a schematic diagram of the overall structure of a PCB detection device in an embodiment of the present application.

Explanation of reference symbols:

1. Assembly workbench; 11. Protection box; 12. Console; 121. Universal wheel; 2. Installation bracket; 3. Test station mechanism; 31. Electric rotating table; 32. Assembly plate; 33. Screw Components; 331. Extension block; 4. Accuracy checking mechanism; 41. Shooting camera; 42. Camera bracket; 43. Lighting lamp; 5. Detection mechanism; 51. Movable components; 511. Guide rail; 512. Guide slider ; 513. Connection block; 514. Probe fixing plate; 52. Detection probe; 53. Support plate; 54. Detection cylinder; 6. Height sensor; 7. Distance sensor; 8. Angle sensor; 9. Screen display module.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention and are not intended to limit the present invention.

In the drawings of this embodiment, the same or similar numbers correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation or a specific orientation. Construction and operation, therefore the terms describing the positional relationships in the drawings are only for illustrative purposes and cannot be understood as limitations of the patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

The implementation of the present invention is described in detail below with reference to specific embodiments;

Referring to Figures 1 and 2, a PCB testing device includes an assembly workbench 1 for placing various mechanisms on the same working plane, a mounting bracket 2 for installing various mechanisms, a testing station mechanism for assembling PCB 3, and a The accuracy check mechanism 4 for PCB position accuracy, the detection mechanism 5 for detecting PCB functions, and the control system (not shown in the figure) that controls the cooperation of each mechanism; the installation bracket 2 and the test station mechanism 3 are set in the assembly work On the upper end of the table 1, the test station mechanism 3 includes an electric rotary table 31, an assembly plate 32 and a screw assembly 33. The electric rotary table 31 is set on the slide block of the screw assembly 33 and follows the slide block to perform reciprocating linear motion. The assembly plate 32 is arranged on the rotation plane of the electric rotary table 31. The rotation plane of the electric rotary table 31 drives the assembly plate 32 to adjust the angle. The PCB is placed on the assembly plate 32 and follows the assembly plate 32 on the electric rotary table 31. Make adjustments; set the accuracy check mechanism 4 for checking the PCB and the detection mechanism 5 for detecting the PCB on the mounting bracket 2, and the screw assembly 33 is threaded under the accuracy check mechanism 4 and the detection mechanism 5. When the control system (not shown in the figure) controls the accuracy check mechanism 4 to check the PCB, the electric rotating stage 31 allows the PCB to rotate and compensate to the appropriate position. Then, the control system (not shown in the figure) controls the screw assembly. The slider of 33 drives the PCB to the bottom of the detection mechanism 5. At this time, the detection mechanism 5 detects the PCB, thereby improving the non-adjustable testing station. When there is an error in the PCB placement position, the probe measurement of the testing equipment will occur. The pressure is not aligned with the test points of the PCB, resulting in the inability to accurately measure the performance of the PCB.

Referring to Figures 1 and 2, the accuracy verification mechanism 4 used for verification includes a shooting camera 41, a camera bracket 42 and a lighting lamp 43. The camera bracket 42 is set on the mounting bracket 2, and then the shooting camera 41 is set on the camera. On the bracket 42, a lighting lamp 43 with a lighting effect is set on the shooting end of the shooting camera 41 and is fixed on the camera bracket 42; when the accuracy check mechanism 4 needs to take pictures and verify the PCB, it uses the fill light and shooting The cameras 41 cooperate with each other to improve the problem that the camera 41 is unstable in taking pictures of the PCB and capturing edges in an environment with poor light sources.

Referring to Figures 1 and 2, the detection mechanism 5 with detection function includes a movable component 51, a detection probe 52, a support plate 53 and a detection cylinder 54. The detection probe 52 is arranged on the movable component 51, and the movable component 51 is slidably arranged on on the mounting bracket 2, so that the detection probe 52 provided on the movable component 51 can move on the mounting bracket 2; install the support plate 53 above the movable component 51 and fix it on the mounting bracket 2, and the detection cylinder 54 is set on On the support plate 53, at the same time, the piston of the detection cylinder 54 passes through the support plate 53 and is connected to the movable component 51, so that the piston of the detection cylinder 54 can drive the movable component 51 to perform reciprocating linear motion, so that the detection probe 52 provided on the movable component 51 You can slide down to detect the test points of the PCB.

1 and 2 , the movable assembly 51 for assembling the detection probe 52 includes a guide rail 511, a guide slider 512, a connecting block 513 and a probe fixing plate 514. The detection probe 52 is arranged on the probe fixing plate 514, the guide rail 511 is vertically arranged on the mounting bracket 2, and the guide slider 512 is slidably arranged on the guide rail 511; the piston of the detection cylinder 54 is connected to the probe fixing plate 514, and one end of the connecting block 513 is connected to the probe fixing plate 514, and the other end is connected to the guide slider 512. When the piston of the detection cylinder 54 reciprocates, it drives the probe fixing plate 514 to make reciprocating linear motion on the guide rail 511.

Referring to Figures 2 and 3, in order to control the sliding height of the probe fixing plate 514 on the mounting bracket 2, a height sensor 6 is provided on the side wall of the probe fixing plate 514 and at one end of the mounting bracket 2 facing the probe fixing plate 514. , the height sensor 6 sends an electrical signal to the control system (not shown in the figure) to limit the upper limit and lower limit positions of the probe fixing plate 514, thereby controlling the sliding height of the probe fixing plate 514 and improving the probe fixing plate 514. If the slide is too deep, the detection probe 52 fixed on the probe fixing plate 514 may collide with the PCB.

Referring to Figures 2 and 4, the rest position of the slider of the screw assembly 33 should be below the accuracy calibration mechanism 4 and the detection mechanism 5. A distance measuring sensor 7 is provided on the slider of the screw assembly 33 and the assembly workbench 1. , when the screw assembly 33 slides below the accuracy calibration mechanism 4 and the detection mechanism 5, the ranging sensor 7 sends a stop electrical signal to the control system (not shown in the figure), allowing the control system (not shown in the figure) to ) controls the screw assembly 33 to stay, thereby controlling the sliding distance of the slider of the screw assembly 33.

Referring to Figures 2 and 4, in order to monitor the rotation angle of the electric rotary table 31, an extension block 331 is provided on the slider of the screw assembly 33, and an angle sensor 8 is provided on the assembly plate 32 and the extension block 331. When the camera 41 captures the PCB on the assembly board 32, the error that needs to be checked is sent to the control system (not shown in the figure), and the control system (not shown in the figure) controls the electric rotating stage 31 to rotate the rotating platform to The corresponding angle, and the angle sensor 8 helps the control system (not shown in the figure) to monitor the rotation angle, thereby improving the problem of inconvenient monitoring of the rotation angle of the rotating platform of the electric rotating table 31.

Referring to Figures 1 and 5, a protective box 11 is provided at the upper end of the assembly workbench 1, and various mechanisms are placed in the protective box 11 to increase the safety of the equipment; a screen display module is provided on the side of the protective box 11 9. The screen display module 9 is connected to the control system (not shown in the figure). The control system (not shown in the figure) transmits various parameters to the screen display module 9, so that the transmission of various parameters is presented in the form of a screen. Achieve the effect of real-time monitoring. Referring to Figures 1 and 2, a console 12 is provided on the lower end of the assembly workbench 1, and a control system (not shown in the figure) is provided in the console 12; in order to facilitate the transportation of the PCB detection device, a console 12 is provided below the console 12 When the universal wheel 121 needs to be transported, the PCB detection device can be transported only through the universal wheel 121, thereby improving the problem of inconvenient transportation of the PCB detection device.

The implementation principle of a PCB detection device in the embodiment of the present application is as follows: the assembly workbench 1, the installation bracket 2, the test station mechanism 3, the accuracy check mechanism 4, the detection mechanism 5 and the control system (not shown in the figure) interact with each other Cooperate to increase the accuracy of PCB detection. Specifically, the installation bracket 2 and the test station mechanism 3 are arranged on the assembly workbench 1 . The test station mechanism 3 is composed of an electric rotating table 31 , an assembly plate 32 and a screw assembly 33 . The electric rotary table 31 is arranged on the slider of the screw assembly 33, and the assembly plate 32 is placed on the rotation plane of the electric rotary table 31 for placing the PCB to be inspected. The accuracy calibration mechanism 4 and the detection mechanism 5 are respectively arranged on the installation bracket 2; during detection, the control system (not shown in the figure) controls the test station mechanism 3 to first slide the PCB on the assembly plate 32 to the accuracy calibration Below the verification mechanism 4, the accuracy of the PCB on the assembly plate 32 is verified through the accuracy verification mechanism 4. The electric rotary table 31 receives the error that needs to be verified, and the rotating platform of the electric rotary table 31 drives the PCB to perform angle compensation. The compensation is completed. Finally, the control system (not shown in the figure) controls the test station mechanism 3 to slide the PCB under the detection mechanism 5, and the PCB is detected by the detection mechanism 5. The entire process is controlled by the control system (not shown in the figure), ensuring that the detection Accuracy and reliability; thereby improving the non-adjustable test station. When there is an error in the placement of the PCB, the probe measurement pressure of the test equipment will not be aligned with the test points of the PCB, resulting in the inability to accurately measure the PCB. various performance issues.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range.

Claims (4)

1. A PCB detection device, characterized in that it comprises an assembly workbench (1), a mounting bracket (2), a test station mechanism (3), an accuracy checking mechanism (4), a detection mechanism (5) and a control system, wherein the mounting bracket (2) and the test station mechanism (3) are arranged on the upper end surface of the assembly workbench (1), the test station mechanism (3) comprises an electric rotating table (31), an assembly plate (32) and a screw assembly (33), the electric rotating table (31) is arranged on a slider of the screw assembly (33), and the assembly plate (32) is arranged on the electric The rotating plane of the rotating table (31), the assembly plate (32) is used to place the PCB; the accuracy check mechanism (4) and the detection mechanism (5) are arranged on the mounting bracket (2); the control system is used to control the test station mechanism (3) to slide the PCB on the assembly plate (32) to below the accuracy check mechanism (4) and the detection mechanism (5), and is also used to control the accuracy check mechanism (4) to perform accuracy check on the PCB on the assembly plate (32), and is also used to control the detection mechanism (5) to detect the PCB on the assembly plate (32); The accuracy check mechanism (4) includes a shooting camera (41), a camera bracket (42) and a lighting lamp (43). The camera bracket (42) is arranged on the installation bracket (2). The shooting The camera (41) is arranged on the camera bracket (42), and the lighting lamp (43) is arranged on the shooting end of the shooting camera (41) and fixed on the camera bracket (42); The detection mechanism (5) includes a movable component (51), a detection probe (52), a support plate (53) and a detection cylinder (54). The detection probe (52) is arranged on the movable component (51). on the movable component (51), the movable component (51) is slidably arranged on the mounting bracket (2); the support plate (53) is located above the movable component (51) and is fixed on the mounting bracket (2). The detection cylinder (54) is arranged on the support plate (53), and the piston of the detection cylinder (54) passes through the support plate (53) and is connected to the movable component (51); An extension block (331) is provided on the slider of the screw assembly (33), and an angle sensor (8) is provided on the assembly plate (32) and the extension block (331). The angle sensor (8) Used to send the error that needs to be checked to the control system after the camera (41) takes a picture of the PCB on the assembly board (32), and the control system controls the rotation angle of the assembly board (32); A distance sensor (7) is provided on the slider of the screw assembly (33) and the assembly workbench (1). The distance sensor (7) is used to control the slide of the screw assembly (33). The sliding distance of the block; The movable component (51) includes a guide rail (511), a guide slider (512), a connecting block (513) and a probe fixing plate (514). The guide rail (511) is arranged on the installation bracket (2 ), the guide slider (512) is slidably arranged on the guide rail (511); the piston of the detection cylinder (54) is connected to the probe fixing plate (514), and the connecting block (513) One end is connected to the probe fixing plate (514), the other end of the connecting block (513) is connected to the guide slider (512), and the detection probe (52) is arranged on the probe fixing plate (513). 514); A height sensor (6) is provided on the probe fixing plate (514) and the mounting bracket (2), and the height sensor (6) is used to control the sliding height of the probe fixing plate (514); The upper end of the assembly workbench (1) is provided with a protective box (11), and the lower end of the assembly workbench (1) is provided with a console (12). 2. A PCB detection device according to claim 1, characterized in that a screen display module (9) is provided on the side of the protection box (11). 3. A PCB detection device according to claim 1, characterized in that the control system is provided in the console (12). 4. A PCB detection device according to claim 3, characterized in that a universal wheel (121) is provided below the console (12), and the universal wheel (121) is used to transport the detection device. .