A flying probe testing machine for PCBA board performance test

Abstract

The application provides a flying probe tester for PCBA board performance testing, and particularly relates to the technical field of PCBA board performance testing, and comprises a test table, a vertical frame fixedly arranged on the top of the test table, a main controller installed on the vertical frame, a bearing plate arranged at the center of the top surface of the test table, at least four execution rods circularly distributed along the circumferential outer wall of the test probe, and a detection piece corresponding to the position of the execution rod, in use, the flying probe tester can realize high-sensitivity and full-dimension automatic detection of the connection state of the test probe, effectively reduces the risk of test failure or distortion caused by loose test probe, helps to improve the stability and reliability of the flying probe tester for PCBA test data, the execution rods are circularly distributed along the circumference of the test probe, and are pressed for detection from multiple directions, compared with one-way detection, the execution rods can comprehensively cover the possible angles of loose test probe, avoid missed detection, and ensure that the detection result is comprehensive and reliable.

Description

TECHNICAL FIELD

[0001] The application provides a flying probe tester for PCBA board performance test, and particularly relates to the technical field of PCBA board performance test. BACKGROUND

[0002] The flying probe test is a high-voltage insulation and low-resistance conduction test (open circuit and short circuit test of a circuit) on a circuit board (PCB, PCBA) by using 4, 6 or 8 probes without the need of a test fixture, which is very suitable for testing small batches of sample boards. The test fixture does not need to be replaced, and the circuit board can be directly installed and tested by running a test program, which is very convenient.

[0003] In the patent authorized publication No. CN217007593U, a flying probe tester is disclosed, which installs at least two layers of test assemblies on a rack, can greatly utilize the advantages of multiple test heads according to different test point distribution centers, and improves the test efficiency.

[0004] Although the existing flying probe tester (such as CN217007593U) improves the efficiency by using multiple test assemblies, it still has the following significant deficiencies: After long-term high-frequency use, the probes are prone to loose connection due to vibration, wear and other factors, which causes significant measurement deviation during the test of the PCBA board. On the one hand, the loose connection of the probes will cause unstable contact pressure between the needle tip and the solder joint, resulting in resistance value fluctuation exceeding the industry standard in the low-resistance conduction test, which may cause open circuit misjudgment. On the other hand, during the high-voltage insulation test, the offset of the loose probe may cause the distance between the electrodes to change, which may cause the insulation resistance measurement value to deviate from the true value, and even misjudge as a short circuit fault.

[0005] Therefore, the application provides a flying probe tester for PCBA board performance test to overcome the deficiencies of the prior art. SUMMARY

[0006] In view of the defects of the prior art, the application provides a flying probe tester for PCBA board performance test, which can effectively solve the technical problems in the background art.

[0007] To achieve the above purpose, the application realizes the following technical solutions:

[0008] The application discloses a flying probe tester for PCBA board performance test, which comprises a test table, a stand fixedly arranged on the top of the test table, a main controller installed on the stand, a bearing plate arranged at the center of the top surface of the test table, an XY-axis moving device arranged on the stand, and a test device installed on the XY-axis moving device and driven by the XY-axis moving device to displace along the X and Y axes.

[0009] The testing device comprises a horizontal base plate, at least four electric cylinders are installed on the horizontal base plate, and the bottom telescopic shaft end of each electric cylinder is connected with a testing probe;

[0010] The probe self-checking mechanism comprises a driving unit, a conversion unit and an execution detection unit, the circumferential movement of the driving unit is converted into vertical movement and horizontal movement through the conversion unit, and the execution detection unit is driven to detect the fastening degree of the connection part between the testing probe and the electric cylinder;

[0011] The driving unit comprises an arc-shaped protrusion which performs circumferential movement;

[0012] The execution detection unit comprises at least four execution rods which are annularly distributed along the circumferential outer wall of the testing probe, and detection pieces which correspond to the positions of the execution rods;

[0013] The detection end of each detection piece horizontally faces the outer wall of the testing probe, and the detection end and the outer wall maintain a detection interval of 0.1 mm;

[0014] The horizontal base plate is fixedly installed with warning pieces which correspond to the testing probes one by one, and the detection pieces are electrically connected with the corresponding warning pieces.

[0015] As preferred, the driving unit further comprises four grooved hanging plates which are fixedly arranged on the bottom non-telescopic shaft of each electric cylinder, the bottom of each grooved hanging plate is rotatably connected with a rotating disc, the arc-shaped protrusion is formed at the edge of the bottom of each rotating disc, arc-shaped inclined surfaces are symmetrically arranged at the two sides of the bottom of the arc-shaped protrusion, the telescopic shaft of each electric cylinder is arranged in the center of the corresponding rotating disc, and a driving motor is arranged above one of the rotating discs, and the output shaft of the bottom of the driving motor is drivingly connected with the rotating disc through meshing transmission structure.

[0016] As preferred, the driving motor is fixedly installed on two adjacent grooved hanging plates.

[0017] As preferred, the meshing transmission structure comprises a gear which is fixedly connected with the output shaft of the driving motor and a plurality of teeth which are annularly distributed on the top surface of the rotating disc corresponding to the driving motor, the plurality of teeth form a ring-shaped toothed ring on the top surface of the rotating disc, and the gear is meshingly connected with the toothed ring.

[0018] As preferred, the top portions of the rotating discs are provided with synchronous transmission structure, the synchronous transmission structure comprises three groups of pulley structures, each group of pulley structure comprises two synchronous pulleys and a synchronous belt which is drivingly connected between the two synchronous pulleys, one group of pulley structure is located between the other two groups of pulley structure and above the other two groups of pulley structure, and the telescopic shaft of each electric cylinder is arranged in the center of each synchronous pulley.

[0019] As preferred, the four synchronous wheels in the lower two groups of pulley structures are coaxially fixedly connected with the top surface of each rotating disc, and the two synchronous wheels in the upper group of pulley structures are coaxially fixedly connected with two of the four synchronous wheels in the lower group.

[0020] As preferred, the conversion unit comprises double sub-plates fixedly connected to the side walls on the bottom of each slotted hanging plate, the bottom of each double sub-plate is fixedly connected with a slotted plate, the slotted plate is internally provided with a T-shaped groove, a T-shaped block is slidingly arranged in the T-shaped groove, a return spring is connected between the T-shaped block and one side groove surface of the T-shaped groove, the top of the T-shaped block is fixedly connected with an inclined movable plate, the top of the slotted plate is fixedly provided with a frame-shaped plate, a pressing rod is penetratingly arranged in the frame-shaped plate, the end of the lower end of the pressing rod is matched with the inclined surface of the inclined movable plate, and the end of the upper end of the pressing rod is located on the path of the circumferential movement of the arc-shaped convex arc-shaped surface.

[0021] The side end of each execution rod is fixedly connected with the bottom of the corresponding T-shaped block, and the side of each detection piece is fixedly connected with the side outer wall of the corresponding slotted plate.

[0022] As preferred, the groove surface at the bottom of the T-shaped groove is provided with two symmetrical half-pipe-shaped grooves, and the top of the T-shaped block is provided with a ball slidingly connected in the half-pipe-shaped groove.

[0023] As preferred, the inclined surface of the inclined movable plate is provided with an inclined guide groove arranged in the form of concave, and the lower end of the pressing rod is abutted in the inclined guide groove.

[0024] As preferred, the ends of the upper and lower ends of the pressing rod are both hemispherical, the outer walls of the two sides of the pressing rod are formed with convex strips, and the top of the frame-shaped plate is provided with a through hole for the pressing rod to pass through.

[0025] Compared with the known prior art, the technical scheme provided by the present application has the following beneficial effects:

[0026] The flying probe tester for PCBA board performance test can realize high-sensitivity, full-dimension automatic detection of the connection state of the test probe of the flying probe tester, effectively reduce the risk of test failure or distortion caused by loose test probe, and help improve the stability and reliability of the flying probe tester for PCBA test data.

[0027] Through the cooperation of the pressure sensor and the preset detection threshold, and in combination with the stiffness characteristics of the test probe, the slight deviation of the test probe is converted into a pressure signal, which can accurately identify the loose test probe and avoid test misjudgment of the PCBA board caused by the connection problem of the test probe.

[0028] The execution rods are distributed in the circumferential direction of the test probe and press and detect from multiple directions, which can comprehensively cover the possible angles of the loose test probe compared with one-way detection, avoid missed detection, and ensure that the detection result is comprehensive and reliable.

[0029] The main controller links all units and automatically controls the testing process to achieve periodic and automated testing without frequent manual intervention, thereby improving testing efficiency and adapting to the needs of large-scale and long-term PCBA board testing.

[0030] When a loose test probe is detected, the system immediately triggers an audible and visual alarm and marks the location on the main controller display screen, making it easier for maintenance personnel to quickly locate the problem, shorten downtime for repairs, and reduce the impact of equipment downtime.

[0031] The synchronous transmission structure ensures consistent detection actions of multiple test probes, allowing simultaneous detection of each test probe and enhancing the overall reliability of the equipment.

[0032] Automated testing reduces the workload and labor costs of manual inspections, provides early warnings of test probe problems, avoids test rework and equipment damage caused by test probe failure, and reduces overall operation and maintenance costs. Attached Figure Description

[0033] Figure 1 This is a front-view perspective view of the present invention.

[0034] Figure 2 This is a three-dimensional structural diagram of the present invention from another perspective;

[0035] Figure 3 This is a partial three-dimensional structural diagram of the relevant components at the grooved hanging plate of the present invention;

[0036] Figure 4 This is a partial three-dimensional structural diagram of the relevant components at the rotating disk of the present invention;

[0037] Figure 5 A partial three-dimensional structural diagram of the relevant components at the groove plate of the present invention;

[0038] Figure 6 A partially exploded three-dimensional structural view of the relevant components at the groove plate of the present invention;

[0039] Figure 7 This is a partial three-dimensional structural diagram of the relevant components in the synchronous transmission structure of the present invention;

[0040] Figure 8 This is a partial bottom view of the relevant components at the rotating disk of the present invention;

[0041] Figure 9 This is a partial bottom-view perspective view of the relevant components at the groove plate of the present invention.

[0042] The labels in the diagram represent:

[0043] 1. Test bench; 11. Stand; 12. Main controller; 13. Support plate; 14. XY axis moving device;

[0044] Test apparatus: 15. Flat substrate; 151. Electric cylinder; 152. Test probe;

[0045] Probe self-test mechanism:

[0046] Drive unit: 21. Slotted hanging plate; 22. Rotary disc; 221. Arc-shaped protrusion; 23. Drive motor; 24. Meshing transmission structure; 25. Synchronous transmission structure;

[0047] Conversion Unit: 31. Twin Slats; 32. Slotted Plate; 33. T-Slot; 34. T-Block; 341. Return Spring; 35. Inclined Moving Plate; 36. Frame Plate; 37. Pressing Rod;

[0048] Execution detection unit: 41. Execution rod; 42. Detection component; 43. Warning component. Detailed Implementation

[0049] The present invention will be further described below with reference to embodiments.

[0050] Embodiments of the present invention:

[0051] like Figures 1 to 9 As shown, a flying probe tester for PCBA board performance testing includes a test table 1, a support frame 11 fixedly mounted on the top of the test table 1, a main controller 12 mounted on the support frame 11, a support plate 13 disposed at the center of the top surface of the test table 1, and an existing drive structure, specifically a lead screw slide drive structure, disposed at the center of the top surface of the test table 1 to drive the support plate 13 to reciprocate and translate. An XY axis moving device 14 is provided on the support frame 11.

[0052] Specifically, the Y-axis moving structure of the XY-axis moving device 14 consists of two lead screws rotatably connected to the test bench 1 and a limiting plate sliding on the upright 11. The lead screw passes through the middle of the limiting plate and forms a ball screw structure with it. The two lead screws are connected by a synchronous pulley and a synchronous belt. A servo motor is connected to the top of one of the lead screws. The servo motor is fixedly installed on the upright 11. The servo motor drives one of the lead screws to rotate, and then drives the other lead screw to rotate synchronously through the synchronous pulley and the synchronous belt, thereby driving the limiting plate to move up and down along the upright 11. The X-axis moving structure of the XY-axis moving device 14 consists of a limiting horizontal plate fixedly connected to one side of the two limiting plates and another lead screw rotatably connected to the limiting horizontal plate. A lead screw is threadedly connected to a lead screw moving block, and one end of the lead screw is connected to another servo motor, which is fixedly installed on the limiting horizontal plate.

[0053] The testing device is mounted on the XY-axis moving device 14, and the XY-axis moving device 14 drives the testing device to move along the X and Y axes respectively.

[0054] The testing device comprises a horizontal substrate 15 arranged on the XY-axis moving device 14, in particular, the horizontal substrate 15 is fixedly arranged on the outer wall of the nut moving block in the X-axis moving structure. At least four electric cylinders 151 are mounted on the horizontal substrate 15, and the end of the bottom telescopic shaft of each electric cylinder 151 is respectively connected with a test probe 152, that is, at least four test probes 152 are arranged, and each test probe 152 is displaced up and down by an independent electric cylinder 151, and then the XY-axis moving device 14 can test the PCBA loaded on the bearing plate 13.

[0055] Further comprising, a probe self-checking mechanism, which comprises a driving unit, a conversion unit, and an execution detection unit, the circular motion of the driving unit is converted into vertical motion and horizontal motion through the conversion unit, and the execution detection unit is driven to detect the fastening degree of the connection part between the test probe 152 and the electric cylinder 151.

[0056] The driving unit comprises an arc-shaped protrusion 221 for circular motion;

[0057] The driving unit further comprises four grooved hanging plates 21 fixedly arranged on the bottom non-telescopic shaft of each electric cylinder 151, and one rotating disc 22 is rotatably connected to the bottom of the four grooved hanging plates 21, the arc-shaped protrusion 221 is formed at the edge of the bottom of each rotating disc 22, and arc-shaped inclined surfaces are symmetrically arranged on both sides of the bottom of the arc-shaped protrusion 221, and the telescopic shaft of each electric cylinder 151 is arranged in the center of the corresponding rotating disc 22, and a driving motor 23 is arranged above one of the rotating discs 22, and the driving motor 23 is fixedly mounted on the adjacent two grooved hanging plates 21. The output shaft at the bottom of the driving motor 23 is in transmission connection with the rotating disc 22 through the meshing transmission structure 24;

[0058] Specifically, the meshing transmission structure 24 is composed of a gear fixedly connected to the output shaft of the driving motor 23 and a plurality of teeth arranged in a ring shape on the top surface of the rotating disc 22 corresponding to the driving motor 23, the plurality of teeth form a ring-shaped toothed ring on the top surface of the rotating disc 22, and the gear is in meshing connection with the toothed ring;

[0059] As an implementation, the driving motor 23 selects a stepping motor (model 42BYGH40-1704A), the output shaft gear of which is in meshing transmission with the ring-shaped toothed ring on the top surface of the rotating disc 22, the transmission ratio is 1:3 (the rotating speed of the rotating disc is 10 rpm when the rotating speed of the motor is 30 rpm), and the reduction ratio can improve the torque output and ensure the stable rotation of the rotating disc 22 driving the arc-shaped protrusion 221.

[0060] Further, the top of each rotating disc 22 is provided with a synchronous transmission structure 25, which is composed of three sets of pulley structures, each set of pulley structure is composed of two synchronous pulleys and a synchronous belt connected between the two synchronous pulleys, one set of pulley structure is located between the other two sets of pulley structure and above the other two sets of pulley structure, and the extension shaft of each electric cylinder 151 passes through the center of each synchronous pulley without affecting the up and down movement of the extension shaft of the electric cylinder 151. The four synchronous pulleys in the lower two sets of pulley structure are coaxially fixedly connected with the top surface of each rotating disc 22, and the two synchronous pulleys in the upper set of pulley structure are coaxially fixedly connected with two of the four synchronous pulleys in the lower two sets of pulley structure. Each rotating disc 22 is driven to rotate synchronously by the synchronous transmission structure 25.

[0061] Further, as shown in Figure 7 the lower two sets of synchronous pulleys correspond to the four rotating discs 22, and the upper set of synchronous pulleys is coaxially connected with the lower pulleys through a transition block. It can be implemented that the synchronous belt is a polyurethane synchronous belt (model HTD-5M).

[0062] The rotating unit includes double sub-plates 31 fixedly connected to the side walls on the bottom of each slotted hanging plate 21, and a slotted plate 32 fixedly connected to the bottom of each double sub-plate 31. The slotted plate 32 has a T-shaped slot 33 inside, and a T-shaped block 34 is slidably arranged inside the T-shaped slot 33. Two symmetrical half-pipe-shaped grooves are arranged on the groove surface at the bottom of the T-shaped slot 33, and a ball is arranged on the top of the T-shaped block 34 and slidably connected in the half-pipe-shaped groove. The ball is embedded in the groove on the top of the T-shaped block 34, and forms a rolling guide pair with the half-pipe-shaped groove, thereby reducing the friction resistance. A return spring 341 is connected between the T-shaped block 34 and one side groove surface of the T-shaped slot 33. The top of the T-shaped block 34 is fixedly connected with an inclined movable plate 35, the top of the slotted plate 32 is fixedly provided with a frame-shaped plate 36, a pressing rod 37 passes through the frame-shaped plate 36, the end of the lower end of the pressing rod 37 is matched with the inclined surface of the inclined movable plate 35, and an inclined guide groove is arranged on the inclined surface of the inclined movable plate 35. The lower end of the pressing rod 37 is located in the inclined guide groove, and the return spring 341 is in a natural state. The end of the upper end of the pressing rod 37 is located on the path of the circumferential movement of the arc-shaped inclined surface of the arc-shaped protrusion 221, and the ends of the upper and lower ends of the pressing rod 37 are both hemispherical surfaces, which are used to ensure the transmission of pressure when the pressing rod 37 is in contact and to improve the stability of the transmission. The two side walls of the pressing rod 37 are formed with protrusions, the top of the frame-shaped plate 36 is provided with a through hole for the pressing rod 37 to pass through, and the protrusions on the two sides of the pressing rod 37 are matched with the through hole of the frame-shaped plate 36 to limit the radial deviation and ensure the vertical movement accuracy.

[0063] One side end of each execution rod 41 is fixedly connected with the bottom of the corresponding T-shaped block 34, and one side of each detection piece 42 is fixedly connected with one side outer wall of the corresponding groove plate 32.

[0064] The execution detection unit comprises at least four execution rods 41 annularly distributed along the circumferential outer wall of the test probe 152, and a detection piece 42 corresponding to the position of the execution rod 41, wherein the detection end of each detection piece 42 horizontally faces the outer wall of the test probe 152 and keeps a detection interval of 0.1 mm with the outer wall;

[0065] The four execution rods 41 are distributed at an interval of 90° along the circumference of the test probe 152 to form a cross-shaped detection array, which can cover the full-directional deviation of the test probe 152; during detection, the four execution rods 41 are pressed against the test probe 152 one by one, and the loose position is located by the detection piece 42.

[0066] The warning piece 43 corresponding to the test probe 152 is fixedly installed on the flat substrate 15, and the detection piece 42 is electrically connected with the corresponding warning piece 43; specifically, the detection piece 42 is configured as a pressure sensor, the warning piece 43 is configured as an audible and light alarm, and the pressure sensor and the audible and light alarm are electrically connected; when the outer wall of the test probe 152 contacts the detection end of the pressure sensor and generates pressure, the audible and light alarm automatically emits sound and light signals.

[0067] The setting of the 0.1 mm detection interval is based on the following factors: the resolution of the pressure sensor (model Honeywell 24PC) is 0.1 mN.

[0068] The working principle of the above embodiment is as follows:

[0069] The main controller 12 sends a command to start the driving motor 23, the output shaft gear of which is engaged with the gear ring of the rotating disc 22 to drive the rotating disc to rotate; the synchronous belt of the synchronous transmission structure 25 drives all the rotating discs 22 to synchronously rotate, thereby ensuring the consistency of the self-checking actions of the test probes 152.

[0070] When the rotating disc 22 rotates, the arc-shaped slope of the arc-shaped protrusion 221 periodically touches and presses the upper end of the pressing rod 37. When the protrusion slope pushes the pressing rod 37 to move downward, the lower end of the pressing rod 37 slides along the slope guide groove of the slope movable plate 35, forcing the slope movable plate 35 to move horizontally towards the test probe 152, and in the process, the reset spring 341 is stretched. The slope movable plate 35 drives the T-shaped block 34 to translate in the T-shaped groove 33, and the execution rod 41 fixed to the T-shaped block 34 horizontally presses the top outer wall of the test probe 152. If the test probe 152 is firmly connected and the deviation is less than 0.1 mm, the detection end of the pressure sensor does not contact or just contacts the outer wall of the test probe 152, and at this time, no signal is output.

[0071] If the test probe 152 is not tightly connected, under the pushing action of the execution rod 41, radial deviation occurs, and the deviation is greater than 0.1 mm, forcing the detection end of the pressure sensor on the side corresponding to the execution rod 41 to contact the outer wall of the test probe 152 and generate additional pressure, and the signal is converted into an electrical signal through an amplification circuit, driving the corresponding warning part 43 to issue an audible and visual alarm, and at the same time, the main controller 12 marks the position of the loose test probe 152 on the display screen.

[0072] Specifically:

[0073] In this embodiment, the deviation of the test probe 152 is "△x"; the test probe 152 deviates from its ideal position due to reasons such as loose connection and vibration. When △x≥0.1 mm, it means that the deviation exceeds the preset threshold. Under normal conditions, the detection end maintains a 0.1 mm gap with the outer wall of the probe, and when the probe deviates more than 0.1 mm, the two are in contact and generate pressure.

[0074] The probe stiffness "k" represents the ability of the test probe (152) to resist deformation, which is k=10 N / mm in this embodiment, indicating that the probe will generate a pressure of 10 N for every 1 mm of deviation.

[0075] The above formula logic and calculation example:

[0076] Formula: F=kx△x; when △x≥0.1 mm, the minimum value of the pressure F is: F=10 N / mm x 0.1 mm=1 mN (1 millinewton, 1 mN=0.001 N).

[0077] That is, when the test probe 152 deviates by 0.1 mm, the pressure detected by the pressure sensor is at least 1 mN, at which time the pressure sensor triggers the audible and visual alarm to prompt the probe connection to be loose or deviate abnormally.

[0078] The reset spring 341 retracts in the arc-shaped protrusion 221 and presses the rod 37, pulling the T-shaped block 34 back to its original position, and the execution rod 41 is separated from the probe, completing a single detection. Each test probe 152 will complete a tightness detection every time the rotating disc 22 rotates one revolution, and the tightness of each test probe 152 can be detected from at least four directions during the detection process; the detection period and time can be adjusted by the main controller by adjusting the motor speed and starting time.

[0079] The core technical effect of the above process is that when the flying probe tester is used, the flying probe tester test probe 12 connection state is realized. High-sensitivity, full-dimension automatic detection, effectively reducing the risk of test failure caused by loose test probe 12.

[0080] Specifically embodied: through the cooperation of the pressure sensor and the preset detection threshold, combined with the stiffness characteristics of the test probe 12, the slight deviation of the test probe 12 is converted into a pressure signal, which can accurately identify the looseness of the test probe 12 and avoid false judgment of the PCBA board test caused by the connection problem of the test probe 12;

[0081] The execution rod is distributed in the circumferential ring of the test probe 12, and is pressed from multiple directions for detection. Compared with one-way detection, it can cover all possible angles of test probe 12 looseness, avoid missed detection, and ensure that the detection result is comprehensive and reliable;

[0082] The main controller links each unit to automatically control the detection process and realize periodic and automatic detection. Without frequent manual intervention, the detection efficiency is improved, and the detection requirements of large-scale and long-time PCBA boards are met;

[0083] When the test probe 12 is detected to be loose, the system immediately triggers an audible and light alarm, and marks the position on the main controller display screen, so that maintenance personnel can quickly locate the problem, shorten the downtime repair time, and reduce the impact of equipment downtime;

[0084] The synchronous transmission structure ensures that the detection actions of multiple test probes 12 are consistent, and each test probe 12 can be detected at the same time, enhancing the overall reliability of the equipment;

[0085] Automatic detection reduces the workload and labor cost of manual inspection, provides early warning of test probe 12 problems, avoids test rework and equipment loss caused by test probe 12 failure, and reduces the overall operation and maintenance cost.

[0086] The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A flying probe tester for PCBA board performance testing, comprising a test table (1), a stand (11) fixedly arranged on the top of the test table (1), a main controller (12) installed on the stand (11), a bearing plate (13) arranged on the top surface of the test table (1), and an XY-axis moving device (14) arranged on the stand (11), characterized in that: a test device is installed on the XY-axis moving device (14) and is driven by the XY-axis moving device (14) to displace along the X and Y axes; the test device comprises a horizontal base plate (15), at least four electric cylinders (151) are installed on the horizontal base plate (15), and the bottom telescopic shaft end of each electric cylinder (151) is connected with a test probe (152); a probe self-checking mechanism comprises a driving unit, a conversion unit and an execution detection unit, the circumferential movement of the driving unit is converted into vertical movement and horizontal movement through the conversion unit, and the execution detection unit is driven to detect the fastening degree of the connection part between the test probe (152) and the electric cylinder (151); the driving unit comprises an arc-shaped protrusion (221) that moves in a circle; the execution detection unit comprises at least four execution rods (41) that are annularly distributed along the circumferential outer wall of the test probe (152), and detection pieces (42) corresponding to the positions of the execution rods (41); the detection end of each detection piece (42) horizontally faces the outer wall of the test probe (152) and maintains a detection interval of 0.1 mm with the outer wall; a warning piece (43) corresponding to the test probe (152) is fixedly installed on the horizontal base plate (15), and the detection piece (42) is electrically connected with the corresponding warning piece (43); the driving unit further comprises four grooved hanger plates (21) fixedly arranged on the bottom non-telescopic shaft of each electric cylinder (151), one rotating disc (22) is commonly rotatably connected to the bottom of the four grooved hanger plates (21), the arc-shaped protrusion (221) is formed at the edge of the bottom of each rotating disc (22), arc-shaped inclined surfaces are symmetrically arranged on both sides of the bottom of the arc-shaped protrusion (221), the telescopic shaft of each electric cylinder (151) is arranged in the center of the corresponding rotating disc (22), a driving motor (23) is arranged above one of the rotating discs (22), and the output shaft at the bottom of the driving motor (23) is in transmission connection with the rotating disc (22) through meshing transmission structure (24); the conversion unit comprises double-sub-plate strips (31) fixedly connected to the side walls of the bottom of each grooved hanger plate (21), each double-sub-plate strip (31) is fixedly connected with a grooved plate (32) at the bottom, the grooved plate (32) is internally provided with a T-shaped groove (33), a T-shaped block (34) is slidably arranged in the T-shaped groove (33), a return spring (341) is connected between the T-shaped block (34) and the groove surface of one side of the T-shaped groove (33), the top of the T-shaped block (34) is fixedly connected with an inclined dynamic plate (35), a frame-shaped plate (36) is fixedly arranged on the top of the grooved plate (32), a pressing rod (37) is arranged to pass through the frame-shaped plate (36), the end of the lower end of the pressing rod (37) is matched with the inclined surface of the inclined dynamic plate (35), and the end of the upper end of the pressing rod (37) is located on the path of the circumferential movement of the arc-shaped inclined surface of the arc-shaped protrusion (221). One side end of each execution rod (41) is fixedly connected with the bottom of a corresponding T-shaped block (34), and one side of each detection piece (42) is fixedly connected with one side outer wall of a corresponding slotted plate (32).

2. The flying probe tester for PCBA board performance test according to claim 1, characterized in that, The driving motor (23) is fixedly installed on the adjacent two slotted hanging plates (21).

3. The flying probe tester for PCBA board performance test according to claim 1, characterized in that, The meshing transmission structure (24) is composed of a gear fixedly connected to the output shaft of the driving motor (23) and a plurality of teeth distributed in a ring shape on the top surface of the rotary disc (22) corresponding to the driving motor (23), the plurality of teeth forming a ring-shaped toothed ring on the top surface of the rotary disc (22), and the gear and the toothed ring being in meshing connection.

4. The flying probe tester for PCBA board performance test according to claim 1, characterized in that, The top portions of the rotary discs (22) are provided with a synchronous transmission structure (25), the synchronous transmission structure (25) being composed of three groups of belt wheel structures, each group of belt wheel structures being composed of two synchronous wheels and a synchronous belt transmissionally connected between the two synchronous wheels, one group of belt wheel structures being located between the other two groups of belt wheel structures and above the other two groups of belt wheel structures, and the extension shafts of each electric cylinder (151) being arranged in the centers of the synchronous wheels.

5. The flying probe tester for PCBA board performance test according to claim 4, characterized in that, The four synchronous wheels in the lower two groups of belt wheel structures are coaxially fixedly connected with the top surfaces of the rotary discs (22), and the two synchronous wheels in the upper group of belt wheel structures are coaxially fixedly connected with two synchronous wheels in the lower four synchronous wheels.

6. The flying probe tester for PCBA board performance test according to claim 1, characterized in that, The bottom of the T-shaped groove (33) is provided with two symmetrical half-pipe-shaped grooves, and the top of the T-shaped block (34) is provided with a ball slidingly connected in the half-pipe-shaped groove.

7. The flying probe tester for PCBA board performance test according to claim 1, characterized in that, The inclined surface of the inclined movable plate (35) is provided with an inclined surface guide groove, and the lower end of the pressing rod (37) is in contact with the inclined surface guide groove.

8. The flying probe tester for PCBA board performance test according to claim 7, characterized in that, The upper and lower ends of the pressing rod (37) are half spherical, and the outer walls of the pressing rod (37) are provided with protrusions, and the top of the frame-shaped plate (36) is provided with a through hole for the pressing rod (37).

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