An automobile instrument panel circuit board testing device

Abstract

The present application relates to the technical fields of circuit board testing, in particular to a kind of automobile dashboard circuit board testing device, the present application includes: test table, test table includes base, installation platform being arranged in parallel along the length direction of base, detection slot being opened in the top of installation platform, detection probe being arranged in the inside of detection slot, the inside of the detection slot is inserted with the circuit board to be measured being electrically connected with detection probe;The testing device further includes vibration mechanism, drive assembly, cold air mechanism and humidifying component.The present application synchronously controls vibration mechanism and cold air mechanism by single drive assembly, utilizes the rotary motion of crank rod to simultaneously drive impact wheel to impact triangular inclined block to generate vibration, and drives rack and pinion transmission by cross slider through transmission connecting rod, so that piston cylinder continuously exhausts air, combined with semiconductor refrigerator to generate low-temperature airflow, realize the synchronous simulation of vibration, low temperature, high humidity comprehensive condition, significantly improve detection efficiency and authenticity.

Description

Technical Field

[0001] This invention relates to the field of circuit board testing technology, specifically a testing device for automotive dashboard circuit boards. Background Technology

[0002] In the automotive manufacturing industry, the dashboard is a key component for drivers to obtain information about vehicle operating status, and its performance and reliability directly affect driving safety and comfort. The dashboard circuit board, as a core component of the dashboard, undertakes the important functions of signal acquisition, processing, and display. However, with the continuous development of automotive electronics technology, the functions of dashboard circuit boards are becoming increasingly complex, and the operating conditions they face are becoming more diverse and demanding.

[0003] Currently, most testing of automotive dashboard circuit boards focuses on performance testing under single operating conditions. For example, traditional vibration testing equipment only considers the impact of mechanical parameters such as vibration frequency and amplitude on the circuit board to evaluate its vibration resistance. However, in actual vehicle operation, vibration is not the only factor affecting the performance of dashboard circuit boards. The operation of a vehicle in different environments exposes the dashboard circuit board to the combined effects of multiple complex environmental factors, including low temperature, high humidity, and vibration. For instance, in cold winters, the dashboard may be exposed to low temperatures for extended periods, and changes in air humidity can also affect the electronic components on the circuit board, accelerating component aging, reducing insulation performance, and potentially causing short circuits. In such cases, testing methods that only consider a single vibration factor are insufficient to comprehensively and accurately assess the reliability and stability of automotive dashboard circuit boards under actual operating conditions.

[0004] Furthermore, existing environmental simulation equipment, such as temperature and humidity chambers, while capable of simulating temperature and humidity changes to some extent, is typically independent of vibration testing systems. This makes it impossible to simultaneously apply multiple environmental factors and precisely control their interactions during testing, resulting in significant discrepancies between the test results and actual usage conditions. Consequently, these results fail to accurately reflect the performance of automotive dashboard circuit boards under complex and comprehensive environmental environments. Summary of the Invention

[0005] The purpose of this invention is to provide a testing device for automotive dashboard circuit boards to solve the problems mentioned in the background art.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A preferred automotive dashboard circuit board testing device includes: a test bench, comprising a base, a mounting platform parallel to the length of the base, a detection slot formed on the top of the mounting platform, and a detection probe disposed inside the detection slot, wherein a circuit board to be tested, electrically connected to the detection probe, is inserted inside the detection slot; the testing device further includes a vibration mechanism, a drive assembly, a cooling air mechanism, and a humidification assembly; the vibration mechanism, disposed on the base and connected to the mounting platform, is used to apply vibration to the mounting platform and the circuit board to be tested placed thereon; the cooling air mechanism, disposed on the base, is used to generate a cold airflow and guide it to the detection slot area or the circuit board to be tested; the humidification assembly, disposed on the base, is used to generate humid air and guide it to the detection slot area or the circuit board to be tested; the drive assembly, disposed on the base, serves as a drive source; the drive assembly is connected to the vibration mechanism to drive it to vibrate; the drive assembly is also connected to the cooling air mechanism to drive it to work, thereby realizing performance testing of the circuit board to be tested under combined vibration, low temperature, and high humidity conditions.

[0008] Preferably, the vibration mechanism includes a crank rod rotatably connected to the top of the base, a triangular wedge block fixedly connected to the bottom of the mounting platform, and a collision wheel rotatably connected to the middle section of the crank rod, the collision wheel rolling against the triangular wedge block.

[0009] Preferably, the vibration mechanism further includes a pair of vibration slide rods symmetrically fixedly connected to the top of the base. One end of each pair of adjacent vibration slide rods is slidably connected to a vibration slide plate. One end of each vibration slide rod is fitted with a pair of springs, which are respectively disposed on both sides of the vibration slide plate. The top of the vibration slide plate is symmetrically fixedly connected to a second vibration slide rod. The bottom of the mounting platform is symmetrically fixedly connected to a pair of connecting slide rods slidably connected to the second vibration slide rod. One end of each second vibration slide rod is symmetrically fitted with a second spring, which is respectively disposed on both sides of the connecting slide rod.

[0010] Preferably, the drive assembly includes a motor disposed on the top of the base, the output end of the motor is connected to a reducer, and the output end of the reducer is coaxially fixed to the crank arm.

[0011] Preferably, the cooling mechanism includes a pair of piston cylinders fixedly connected to the bottom of the base. A piston rod is slidably connected inside the piston cylinders. An air intake port and an air exhaust port are respectively provided at the bottom of the piston cylinders. A solenoid valve is provided inside both the air intake port and the air exhaust port. A semiconductor cooler is fixedly connected to the output end of the air exhaust port. Air distribution pipes are arranged parallel to each other on both sides of the mounting platform along the length of the base. An air supply pipe for connecting to the semiconductor cooler is fixedly connected to the input end of the air distribution pipe.

[0012] Preferably, the cooling mechanism further includes a pair of opposing racks fixedly connected inside the base. The base has a pair of opposing transmission grooves inside. The two racks are arranged alternately with the transmission grooves. A rack is slidably connected inside the transmission grooves. A transmission gear is provided between the opposing and parallel racks. The top of the piston rod passes through the piston cylinder and is fixedly connected to the rack.

[0013] Preferably, the cooling mechanism further includes transmission slide rods symmetrically fixedly connected to one end of the base, one end of the two transmission slide rods being slidably connected to a cross slider, the bottom of the cross slider being symmetrically rotatably connected to a transmission gear, one end of the crank rod being hinged to a transmission connecting rod, and the top of the cross slider being hinged to the transmission connecting rod.

[0014] Preferably, the humidification assembly includes a cross-shaped tube head fixedly connected to the output end of the semiconductor cooler. The output end of the cross-shaped tube head is fixedly connected to the air supply pipe. The interior of the cross-shaped tube head is filled with humidifying cotton. A humidification port is provided on the side of the cross-shaped tube head. A second solenoid valve is provided inside the humidification port. A negative pressure water tank is symmetrically fixedly connected inside the base. A negative pressure drainage pipe is provided inside the negative pressure water tank. The output end of the negative pressure drainage pipe passes through the negative pressure water tank and is fixedly connected to the input end of the humidifying cotton.

[0015] Preferably, the testing device further includes a temperature sensor and a humidity sensor fixedly connected to the top of the mounting platform. The temperature sensor is electrically connected to the air intake and the solenoid valve, and the humidity sensor is electrically connected to the solenoid valve.

[0016] Preferably, the testing device further includes an arched frame fixedly connected to the top of the mounting platform. One end of the arched frame is symmetrically slidably connected to a pressing slide rod. The bottom of the two pressing slide rods is fixedly connected to a pressing plate. The top of the arched frame is fixedly connected to an electric push rod. The output end of the electric push rod is fixedly connected to the top of the pressing plate. The pressing plate is installed above the testing slot.

[0017] The beneficial effects of this invention are:

[0018] 1. This invention synchronously controls the vibration mechanism and the cooling mechanism through a single drive component. The rotational motion of the crank lever simultaneously drives the collision wheel to impact the triangular block to generate vibration. The transmission link drives the cross slider to drive the rack and pinion transmission, so that the piston cylinder continuously pumps out air. Combined with the semiconductor cooler to generate low-temperature airflow, it realizes the synchronous simulation of comprehensive working conditions of vibration, low temperature and high humidity, which significantly improves the detection efficiency and authenticity.

[0019] 2. This invention monitors environmental parameters in real time using temperature and humidity sensors, automatically controls the opening and closing of solenoid valve one and solenoid valve two, and precisely adjusts the cold air flow and humidification intensity to ensure stable and controllable test environment parameters, effectively solving the detection deviation problem caused by the separation of operating conditions in traditional equipment.

[0020] 3. This invention uses a combination of a negative pressure water tank and a negative pressure drainage pipe to automatically absorb moisture into the humidifying cotton using airflow negative pressure. Then, cold airflow penetrates the humidifying cotton to generate uniform humid air, thereby adjusting the humidity index of the detection scene. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of the testing device in this invention;

[0023] Figure 2 This is a side view of the testing device in this invention;

[0024] Figure 3 This is an exploded view of the top structure in this invention;

[0025] Figure 4 This is a schematic diagram of the top structure in this invention;

[0026] Figure 5 yes Figure 4 Enlarged view of point A in the middle;

[0027] Figure 6 This is an exploded view of the internal structure of this invention;

[0028] Figure 7 This is a schematic diagram of the three-dimensional structure of [the component] in this invention;

[0029] Figure 8 This is a schematic diagram of the internal structure of the present invention;

[0030] The following are the reference numerals in the attached diagram: 1. Base; 2. Mounting platform; 3. Detection slot; 4. Detection probe; 5. Circuit board under test; 6. Vibration slide bar one; 7. Vibration slide plate; 8. Spring one; 9. Vibration slide bar two; 10. Connecting slide bar; 11. Spring two; 12. Crank rod; 13. Triangular wedge block; 14. Transmission connecting rod; 15. Motor; 16. Reducer; 17. Piston cylinder; 18. Piston rod; 19. Inlet; 20. Exhaust port; 21. Solenoid valve one; 22. Gas equalization pipe; 23. Air supply pipe; 24. Transmission slide bar; 25. Cross slide bar; 26. Transmission gear; 27. Rack 1; 28. Transmission slide groove; 29. ​​Rack 2; 30. Cross tube head; 31. Humidifying cotton; 32. Solenoid valve 2; 33. Negative pressure water tank; 34. Negative pressure drainage pipe; 35. Semiconductor cooler; 36. Temperature sensor; 37. Humidity sensor; 38. Arch frame; 39. Pressing slide bar; 40. Pressing plate; 41. Electric push rod; 42. Humidification port; 43. Collision wheel. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] A testing device for automotive dashboard circuit boards is disclosed, belonging to the field of automotive electronic reliability testing technology. This testing system is specifically designed for high reliability verification of automotive dashboard circuit boards under complex driving environments. By linking a vibration mechanism and a cooling mechanism with a drive component, it achieves simultaneous loading of vibration, low temperature, and high humidity conditions; simultaneously, it dynamically adjusts environmental parameters through sensor feedback to ensure precise and controllable testing conditions, thereby improving testing efficiency.

[0033] like Figures 1-6As shown, the device includes: a test bench, comprising a base 1, a mounting platform 2 parallel to the length of the base 1, a detection slot 3 formed on the top of the mounting platform 2, and a detection probe 4 disposed inside the detection slot 3. A circuit board 5 to be tested, electrically connected to the detection probe 4, is inserted inside the detection slot 3. The test device also includes a vibration mechanism, a drive assembly, a cooling mechanism, and a humidification assembly. The vibration mechanism, disposed on the base 1 and connected to the mounting platform 2, is used to apply vibration to the mounting platform 2 and the circuit board 5 placed thereon. The cooling mechanism, disposed on the base 1, is used to generate a cool airflow and guide it to the detection slot 3 area or the circuit board 5 to be tested. The humidification assembly, disposed on the base 1, is used to generate humid air and guide it to the detection slot 3 area or the circuit board 5 to be tested. The drive assembly, disposed on the base 1, serves as a drive source. The drive assembly is connected to the vibration mechanism to drive it to vibrate. The drive assembly is also connected to the cooling mechanism to drive it to operate, thereby realizing the performance testing of the circuit board 5 under combined vibration, low temperature, and high humidity conditions.

[0034] In use, by setting up the vibration mechanism, drive component, cooling mechanism and humidification component to work together, when the drive component is started, the vibration mechanism and cooling mechanism are triggered simultaneously. This allows the circuit board under test 5 to bear mechanical vibration stress while receiving cold air from the cooling mechanism, simulating a low temperature and vibration working environment. The cooling mechanism also works with the humidification component to adjust the humidity in the test environment, thereby achieving synchronous loading test of vibration, low temperature and high humidity triple working conditions.

[0035] like Figures 1-5 As shown, the vibration mechanism includes a crank rod 12 rotatably connected to the top of the base 1, a triangular inclined block 13 fixedly connected to the bottom of the mounting platform 2, and a collision wheel 43 rotatably connected to the middle section of the crank rod 12, with the collision wheel 43 rolling against the triangular inclined block 13. The vibration mechanism also includes a pair of vibration slide rods 6 symmetrically fixedly connected to the top of the base 1, with a vibration slide plate 7 slidably connected to one end of each adjacent pair of vibration slide rods 6. A pair of springs 8 are fitted onto one end of each vibration slide rod 6, with the two springs 8 respectively positioned on both sides of the vibration slide plate 7. A second vibration slide rod 9 is symmetrically fixedly connected to the top of the vibration slide plate 7, and a pair of connecting slide rods 10 slidably connected to the second vibration slide rod 9 are symmetrically fixedly connected to the bottom of the mounting platform 2. A second spring 11 is symmetrically fitted onto one end of each vibration slide rod 9, with two adjacent springs 11 respectively positioned on both sides of the connecting slide rod 10. Furthermore, the drive assembly includes a motor 15 mounted on the top of the base 1, with a reducer 16 connected to the output end of the motor 15, and the output end of the reducer 16 coaxially fixed to the crank rod 12.

[0036] In use, the starter motor 15 drives the crank 12 to rotate after being reduced in speed by the reducer 16. The collision wheel 43 periodically impacts the inclined surface of the triangular block 13, forcing the mounting platform 2 to slide laterally along the second vibration slide bar 9. The second spring 11 buffers and rebounds to form reciprocating vibration. At the same time, the vibration slide plate 7 slides longitudinally along the first vibration slide bar 6 and is buffered by the first spring 8, realizing multi-dimensional vibration transmission and accurately simulating the bumpy driving conditions of a car.

[0037] like Figure 2 and Figure 6 , Figure 7 As shown, the cooling mechanism includes a pair of piston cylinders 17 fixedly connected to the bottom of the base 1. A piston rod 18 is slidably connected inside the piston cylinders 17. An air intake 19 and an exhaust 20 are respectively provided at the bottom of the piston cylinders 17. A solenoid valve 21 is provided inside both the air intake 19 and the exhaust 20. A semiconductor cooler 35 is fixedly connected to the output end of the exhaust 20. Air distribution pipes 22 are arranged parallel to each other on both sides of the mounting platform 2 along the length of the base 1. An air supply pipe 23 for connecting to the semiconductor cooler 35 is fixedly connected to the input end of the air distribution pipe 22. The cooling mechanism also includes a pair of opposing racks 27 fixedly connected inside the base 1. A [missing information - likely a design element] is provided inside the base 1. The transmission slide 28 is arranged in opposition, and two racks 27 are staggered with the transmission slide 28. A rack 29 is slidably connected inside the transmission slide 28, and a transmission gear 26 is provided between the opposing and parallel racks 27 and rack 29. The top of the piston rod 18 passes through the piston cylinder 17 and is fixedly connected to the rack 29. The cooling mechanism also includes transmission slide rods 24 symmetrically fixedly connected to one end of the base 1. A cross slider 25 is slidably connected to one end of the two transmission slide rods 24. The bottom of the cross slider 25 is symmetrically rotatably connected to the transmission gear 26. A transmission connecting rod 14 is hinged to one end of the crank rod 12, and the top of the cross slider 25 is hinged to the transmission connecting rod 14.

[0038] In use, when the crank 12 rotates, it drives the transmission connecting rod 14 to push the cross slider 25 to reciprocate along the transmission slide rod 24, causing the transmission gear 26 to drive the rack 29 to move up and down, thereby pulling the piston rod 18 to pump air in the piston cylinder 17. When the piston rod 18 is lifted, the solenoid valve 21 of the air intake port 19 opens to draw in air; when it is pressed down, the solenoid valve 21 of the exhaust port 20 opens, and the air is cooled by the semiconductor cooler 35 and then delivered to the air distribution pipe 22 by the air supply pipe 23, and blown evenly onto the circuit board 5 under test to reduce the temperature of the circuit board 5 under test during testing and simulate a low-temperature working environment.

[0039] like Figures 6-8As shown, the humidification assembly includes a cross-shaped tube head 30 fixedly connected to the output end of the semiconductor cooler 35. The output end of the cross-shaped tube head 30 is fixedly connected to the air supply pipe 23. The interior of the cross-shaped tube head 30 is filled with humidifying cotton 31. A humidification port 42 is opened on the side of the cross-shaped tube head 30. A solenoid valve 32 is installed inside the humidification port 42. A negative pressure water tank 33 is symmetrically fixedly connected inside the base 1. A negative pressure drainage pipe 34 is installed inside the negative pressure water tank 33. The output end of the negative pressure drainage pipe 34 passes through the negative pressure water tank 33 and is fixedly connected to the input end of the humidifying cotton 31.

[0040] When in use, if the humidity is insufficient, the solenoid valve 2 32 is opened. When the cold air flows through the cross tube head 30, it generates negative pressure at the negative pressure drainage tube 34, automatically drawing water from the negative pressure water tank 33 to wet the humidifying cotton 31. After the airflow passes through the humidifying cotton 31, it forms uniform humid air, accurately controlling the humidity of the test environment.

[0041] like Figure 3 and Figure 7 , Figure 8 As shown, the testing device also includes a temperature sensor 36 and a humidity sensor 37 fixedly connected to the top of the mounting platform 2. The temperature sensor 36 is electrically connected to the air intake 19 and the solenoid valve 21, and the humidity sensor 37 is electrically connected to the solenoid valve 32.

[0042] During use, the temperature sensor 36 monitors the temperature of the detection tank 3 in real time. If it is higher than the set threshold, the opening of the solenoid valve 21 of the air intake 19 is increased to increase the flow of cold air. The humidity sensor 37 controls the opening and closing of the solenoid valve 32 to dynamically maintain a high humidity environment.

[0043] like Figures 1-3 As shown, the testing device also includes an arched frame 38 fixedly connected to the top of the mounting platform 2. One end of the arched frame 38 is symmetrically slidably connected to a pressing slide rod 39. The bottom of the two pressing slide rods 39 is fixedly connected to a pressing plate 40. The top of the arched frame 38 is fixedly connected to an electric push rod 41. The output end of the electric push rod 41 is fixedly connected to the top of the pressing plate 40. The pressing plate 40 is installed above the detection groove 3.

[0044] When in use, first place the circuit board to be tested 5 inside the detection groove 3 and align it with the detection probe 4. Then, start the electric push rod 41 to push the pressing plate 40 down, pressing the circuit board to be tested 5 into the detection groove 3, ensuring that the detection probe 4 and the circuit board to be tested 5 are in stable contact.

[0045] The working principle of the automotive dashboard circuit board testing device provided by this invention is as follows:

[0046] First, the circuit board 5 to be tested is inserted into the test slot 3, so that its contacts are electrically connected to the test probe 4; then, the electric push rod 41 is activated to push the pressing plate 40 down, firmly pressing the circuit board into the test slot 3; next, the motor 15 is activated, and after being reduced in speed by the reducer 16, it drives the crank 12 to rotate at a constant speed, simultaneously triggering the two working systems:

[0047] The first working system uses crank 12 to drive collision wheel 43 to periodically impact the inclined surface of triangular block 13 at the bottom of mounting platform 2, forcing mounting platform 2 to slide laterally along connecting slide rod 10. Spring 11 is compressed, stores energy, and rebounds to form continuous reciprocating vibration. At the same time, vibration slide plate 7 slides longitudinally along vibration slide rod 6, and is buffered by spring 8 to form multidimensional vibration waves, so that the circuit board under test 5 is subjected to omnidirectional mechanical stress, accurately simulating the bumpy driving conditions of a car.

[0048] The second working system is driven by the crank 12 through the transmission connecting rod 14 to push the cross slider 25 to reciprocate along the transmission slide rod 24, which drives the transmission gear 26 to drive the rack 29 to move vertically, pulling the piston rod 18 to evacuate air in the piston cylinder 17. When the piston rod 18 is lifted, the solenoid valve 21 of the air intake port 19 opens to draw in air; when the piston rod 18 is pressed down, the solenoid valve 21 of the exhaust port 20 opens, and the air is deeply cooled by the semiconductor cooler 35 to form a low-temperature airflow, which is delivered to the air distribution pipe 22 through the air supply pipe 23 to evenly cover the surface of the circuit board 5 under test.

[0049] Furthermore, when the humidity sensor 37 detects that the ambient humidity is lower than the set threshold, the solenoid valve 32 is opened. When the low-temperature airflow flows through the cross tube head 30, it generates negative pressure at the negative pressure drainage tube 34, automatically drawing water from the negative pressure water tank 33 to wet the humidifying cotton 31, thereby adjusting the humidity in the detected environment.

[0050] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. An automotive instrument cluster circuit board testing apparatus, characterized by: The utility model relates to a test device for circuit board, which comprises a base (1), a mounting table (2) arranged in parallel along the length direction of the base (1), a detection slot (3) opened on the top of the mounting table (2), and a detection probe (4) arranged in the detection slot (3). The test device further comprises a vibration mechanism, a driving assembly, a cold air mechanism and a humidifying assembly. The vibration mechanism is arranged on the base (1) and connected with the mounting table (2) to apply vibration to the mounting table (2) and the circuit board (5) placed thereon. The cold air mechanism is arranged on the base (1) to generate cold air flow and direct it to the detection slot (3) area or the circuit board (5). The humidifying assembly is arranged on the base (1) to generate humid air and direct it to the detection slot (3) area or the circuit board (5). The driving assembly is arranged on the base (1) as a driving source. The driving assembly is connected with the vibration mechanism to drive it to generate vibration. The driving assembly is also connected with the cold air mechanism to drive it to work. The vibration mechanism comprises a crank rod (12) rotatably connected to the top of the base (1). The bottom of the mounting table (2) is fixedly connected with a triangular inclined block (13). The middle segment of the crank rod (12) is rotatably connected with a collision wheel (43). The collision wheel (43) is in rolling contact with the triangular inclined block (13). The vibration mechanism further comprises a pair of vibration sliding rods (6) symmetrically fixedly connected to the top of the base (1). One end of each of the adjacent two vibration sliding rods (6) is slidably connected with a vibration sliding plate (7). One end of each of the vibration sliding rods (6) is sleeved with a pair of springs (8). The two springs (8) are arranged on the two sides of the vibration sliding plate (7), respectively. The top of the vibration sliding plate (7) is symmetrically fixedly connected with a vibration sliding rod (9). The bottom of the mounting table (2) is symmetrically fixedly connected with a pair of connecting sliding rods (10) slidably connected with the vibration sliding rod (9). One end of the vibration sliding rod (9) is symmetrically sleeved with a spring (11). The two springs (11) are arranged on the two sides of the connecting sliding rod (10), respectively. The cold air mechanism comprises a pair of piston cylinders (17) fixedly connected to the bottom of the base (1). A piston rod (18) is slidably connected in the piston cylinder (17). The bottom of the piston cylinder (17) is provided with an air suction port (19) and an air outlet (20), respectively. An electromagnetic valve (21) is arranged in the air suction port (19) and the air outlet (20). A semiconductor refrigerator (35) is fixedly connected to the output end of the air outlet (20). An air pipe (22) is arranged in parallel along the length direction of the base (1) on the two sides of the mounting table (2). The input end of the air pipe (22) is fixedly connected with a gas supply pipe (23) for connecting the semiconductor refrigerator (35). ​ And, the cold air mechanism further includes a pair of opposite rack one (27) fixedly connected inside the base (1), a pair of opposite transmission sliding grooves (28) are arranged in the base (1), the two rack one (27) and the transmission sliding groove (28) are staggered, the transmission sliding groove (28) is slidably connected with a rack two (29), and the opposite parallel rack one (27) and the rack two (29) are provided with a transmission gear (26), and the top of the piston rod (18) passes through the piston cylinder (17) and is fixedly connected with the rack two (29).

2. The testing device for a circuit board of an automobile instrument panel according to claim 1, characterized by: The driving assembly includes a motor (15) arranged at the top of the base (1), and the output end of the motor (15) is connected with a speed reducer (16), and the output end of the speed reducer (16) is coaxially fixed with the crank rod (12).

3. The testing device for an automobile instrument panel circuit board according to claim 1, characterized by: The cold air mechanism further includes a transmission sliding rod (24) fixedly connected at one end of the base (1), one end of the two transmission sliding rods (24) is slidably connected with a cross sliding block (25), the bottom of the cross sliding block (25) is rotatably connected with a transmission gear (26), one end of the crank rod (12) is hingedly connected with a transmission connecting rod (14), and the top of the cross sliding block (25) is hingedly connected with the transmission connecting rod (14).

4. The apparatus of claim 1, wherein: The humidifying assembly includes a cross pipe head (30) fixedly connected to the output end of the semiconductor refrigerator (35), the output end of the cross pipe head (30) is fixedly connected with the air supply pipe (23), the inside of the cross pipe head (30) is filled with humidifying cotton (31), the side of the cross pipe head (30) is provided with a humidifying port (42), the inside of the humidifying port (42) is provided with a solenoid valve two (32), the inside of the base (1) is fixedly connected with a negative pressure water tank (33), the inside of the negative pressure water tank (33) is provided with a negative pressure drainage pipe (34), the output end of the negative pressure drainage pipe (34) passes through the negative pressure water tank (33) and is fixedly connected with the input end of the humidifying cotton (31).

5. The automotive instrument panel circuit board testing apparatus of claim 1, wherein: The testing device further includes a temperature sensor (36) and a humidity sensor (37) fixedly connected to the top of the mounting table (2), the temperature sensor (36) is electrically connected with the air inlet (19) and the solenoid valve one (21), and the humidity sensor (37) is electrically connected with the solenoid valve two (32).

6. The apparatus of claim 5 wherein: The testing device further includes an arcuate frame (38) fixedly connected to the top of the mounting table (2), one end of the arcuate frame (38) is slidably connected with a pressing sliding rod (39), the bottoms of the two pressing sliding rods (39) are fixedly connected with a pressing plate (40), the top of the arcuate frame (38) is fixedly connected with an electric push rod (41), the output end of the electric push rod (41) is fixedly connected with the top of the pressing plate (40), and the pressing plate (40) is installed above the detection groove (3).

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