PCB voltage detection device

Abstract

The invention relates to the technical field of circuit board detection equipment, in particular to a PCB voltage detection device which comprises a detection mechanism, the detection mechanism comprises a detection table, a bottom plate is arranged on the detection table, a square cover is arranged above the bottom plate, ATE automatic test equipment is arranged in the middle of the square cover, telescopic curtain cloth is arranged at the lower end of the square cover, and a sealing strip is arranged below the telescopic curtain cloth. And the ATE is fixed on the side plate of the detection table through a first electric telescopic rod. The detection environment is filled with nitrogen, moisture and oxygen in the air are prevented from interfering the voltage detection accuracy, and meanwhile the size of the cover formed by the square cover, the telescopic curtain cloth and the sealing strip can adaptively change along with the height of the PCB. The amount of nitrogen filled into the cover formed by the square cover, the telescopic curtain cloth and the sealing strip also changes along with the volume of the cover formed by the square cover, the telescopic curtain cloth and the sealing strip, and the square cover and the telescopic curtain cloth are matched with each other, so that waste caused by insufficient or excessive nitrogen filling amount is prevented, and meanwhile, PCBs of various models can be detected.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit board detection equipment, in particular to a PCB board voltage detection device. Background Art

[0002] The primary purpose of circuit board voltage testing is to ensure the proper operation of electronic equipment, prevent potential failures, ensure device safety, and optimize system performance. By testing the voltage on a circuit board, we can verify that the power supply is stable and that each component is receiving the correct voltage. This is fundamental to ensuring that electronic equipment operates according to its designed specifications and functions properly.

[0003] In electronics manufacturing and testing, ATE is used to automate the testing of circuit boards, components, or entire systems. ATE systems perform a range of tests, including voltage probing, current measurement, signal integrity analysis, and functional verification, to ensure that the unit under test meets design specifications and performance requirements. Oxygen and humidity are two important environmental factors during circuit board voltage testing, which can significantly affect test results, especially for circuit boards requiring high-precision voltage measurements.

[0004] In view of this, the present invention proposes a PCB board voltage detection device to solve the above technical problems. Summary of the Invention

[0005] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of this application to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions should not be used to limit the scope of the present invention.

[0006] A PCB board voltage detection device includes a detection mechanism, which includes a detection platform, a base plate is provided on the detection platform, a square cover is provided above the base plate, an ATE automatic test equipment is provided in the middle of the square cover, a telescopic curtain is provided at the lower end of the square cover, a sealing strip is provided below the telescopic curtain, the ATE automatic test equipment is fixed to the side plate of the detection platform through a No. 1 electric telescopic rod, one end of the square cover is provided with a sleeve, a No. 1 piston rod is slidably connected in the sleeve, the piston end of the No. 1 piston rod is fixedly connected to the upper wall of the sleeve by a spring, the other end of the No. 1 piston rod is fixedly connected to the sealing strip, the sleeve is connected to the airway through an air guide pipe, the airway is provided in the No. 2 piston rod, the No. 2 piston rod is slidably connected to the gas storage pipe, the gas storage pipe is fixedly connected to the side plate of the detection platform, the bottom of the gas storage pipe is fixedly connected to the square cover through an air supply pipe, a sliding disk is slidably connected in the airway, the upper part of the sliding disk is fixedly connected to the output end of the No. 2 electric telescopic rod, and the No. 2 electric telescopic rod is fixedly connected to the support frame of the detection platform.

[0007] As a preferred solution of the PCB voltage detection device provided by the present invention, a distance sensor for detecting the height of the PCB is provided on the upper end surface of the square cover.

[0008] As a preferred solution of the PCB board voltage detection device provided by the present invention, the bottom of the gas storage tube is connected to a gas supply pipe for supplying nitrogen.

[0009] As a preferred embodiment of the PCB voltage detection device provided by the present invention, a conveying mechanism is provided below the detection mechanism. The conveying mechanism includes rotating rollers. Two sets of rotating rollers are provided, both of which are arranged on the detection platform. A belt for conveying the PCB board is rotatably connected to the rotating rollers. The bottom plate is located below the upper belt, and there is a gap between the two.

[0010] As a preferred solution of the PCB board voltage detection device provided by the present invention, a centering mechanism is provided on both sides of the conveying mechanism, and the centering mechanism includes an electric push rod. The electric push rod is provided with two groups symmetrically distributed on both sides of the belt. The electric push rods are fixedly connected to the detection table, and the output end of the electric push rod is facing the center of the belt. The output end of the electric push rod is fixedly connected to a push plate, and the push plate is slidably connected to the upper end surface of the upper belt.

[0011] As a preferred solution of the PCB board voltage detection device provided by the present invention, a dust cleaning mechanism is provided in the square cover, and the dust cleaning mechanism includes an elastic metal sheet. The elastic metal sheet is provided on the telescopic curtain. The bending shape of the elastic metal sheet matches the telescopic curtain. The elastic metal sheet and the telescopic curtain are bent and stretched. The elastic metal sheet is connected to the power supply via a wire, and the power supply is fixedly connected to the end face of the ATE automatic testing equipment.

[0012] As a preferred solution of the PCB board voltage detection device provided by the present invention, an air outlet is fixedly connected to the inner wall of the square cover, the air outlet is arranged obliquely downward, and the air supply pipe is connected to the air outlet.

[0013] As a preferred solution of the PCB board voltage detection device provided by the present invention, the connection position of the air guide tube and the sleeve is always located below the piston end on the No. 1 piston rod.

[0014] Beneficial effects of the present invention:

[0015] In the present invention, nitrogen is filled in the testing environment to prevent moisture and oxygen in the air from interfering with voltage detection accuracy. Simultaneously, the volume of the enclosure formed by the square enclosure, telescopic curtain, and sealing strips adapts to the height of the PCB board. The amount of nitrogen introduced into the enclosure also adapts to the volume of the enclosure formed by the square enclosure, telescopic curtain, and sealing strips. These two factors work in concert, preventing waste caused by insufficient or excessive nitrogen injection and enabling testing of various PCB board models. Furthermore, during testing, nitrogen ejected from the air outlet blows away dust on the PCB board, which is then absorbed by the elastic metal sheet, preventing it from drifting and remaining on the PCB board, further improving detection accuracy. After the test is completed and the power supply to the elastic metal sheet is stopped, some dust on the elastic metal sheet falls off. After the first electric telescopic rod is reset upward, the telescopic curtain and elastic metal sheet extend, shaking off the dust on the elastic metal sheet and providing a self-cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0017] in:

[0018] Figure 1 This is a schematic diagram of the overall structure of a PCB board voltage detection device;

[0019] Figure 2 This is a schematic diagram of the connection structure of a detection mechanism in a PCB board voltage detection device;

[0020] Figure 3 This is a schematic diagram of the connection structure inside the square cover of a PCB board voltage detection device;

[0021] Figure 4 for Figure 3 A magnified schematic diagram of the structure at center A;

[0022] Figure 5 This is a schematic diagram of the connection structure between the conveying mechanism and the centering mechanism in a PCB board voltage detection device;

[0023] Figure 6 for Figure 5 A magnified schematic diagram of the structure at point B.

[0024] In the picture:

[0025] 1. Testing mechanism; 11. Testing table; 12. Bottom plate; 13. Square cover; 14. Telescopic curtain; 15. Sealing strip; 16. ATE automatic test equipment; 17. Distance sensor; 18. No. 1 electric telescopic rod; 19. Sleeve; 110. No. 1 piston rod; 111. Air guide tube; 112. Spring; 113. Air storage tube; 114. Air transmission tube; 115. Air supply tube; 116. No. 2 piston rod; 117. Airway; 118. No. 2 electric telescopic rod; 119. Sliding plate;

[0026] 2. Conveying mechanism; 21. Rotating roller; 22. Belt;

[0027] 3. Centering mechanism; 31. Electric push rod; 32. Push plate;

[0028] 4. Dust cleaning mechanism; 41. Power supply; 42. Elastic metal sheet; 43. Air outlet;

[0029] 99. PCB board. DETAILED DESCRIPTION

[0030] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] Example

[0032] like Figures 1-6As shown, a PCB board voltage detection device includes a detection mechanism 1, which includes a detection platform 11, a base plate 12 is provided on the detection platform 11, a square cover 13 is provided above the base plate 12, an ATE automatic test device 16 is provided in the middle of the square cover 13, a telescopic curtain 14 is provided at the lower end of the square cover 13, a sealing strip 15 is provided below the telescopic curtain 14, the ATE automatic test device 16 is fixed to the side plate of the detection platform 11 through a No. 1 electric telescopic rod 18, a sleeve 19 is provided at one end of the square cover 13, a No. 1 piston rod 110 is slidably connected to the sleeve 19, the piston end of the No. 1 piston rod 110 is fixedly connected to the upper wall of the sleeve 19 by a spring 112, and an air guide tube 111 and the sleeve 19 are fixed to the upper wall of the sleeve 19. The connection position is always below the piston end on the No. 1 piston rod 110. The other end of the No. 1 piston rod 110 is fixedly connected to the sealing strip 15. The sleeve 19 is connected to the air duct 111 and the air duct 117. The air duct 117 is arranged in the No. 2 piston rod 116. The No. 2 piston rod 116 is slidably connected to the air storage pipe 113. The air storage pipe 113 is fixedly connected to the side panel of the test bench 11. The bottom of the air storage pipe 113 is fixedly connected to the square cover 13 through the air delivery pipe 114. A sliding disk 119 is slidably connected in the air duct 117. The top of the sliding disk 119 is fixedly connected to the output end of the No. 2 electric telescopic rod 118. The No. 2 electric telescopic rod 118 is fixedly connected to the support frame of the test bench 11.

[0033] The upper end surface of the square cover 13 is provided with a distance sensor 17 for detecting the height of the PCB board 99; when the square cover 13 moves downward and approaches the PCB board 99, the distance sensor 17 follows and descends. The distance sensor 17 can measure the distance between the highest point of the PCB board 99 and the upper wall of the square cover 13. Because the PCB board 99 has a large number of electronic components of different sizes, the heights of the highest points of different PCB boards 99 are different. The distance sensor 17 can control the telescopic length of the No. 1 electric telescopic rod 18, thereby controlling the square cover 13 to prevent it from colliding with the highest point of the PCB board 99. At the same time, a preset space needs to be reserved for the ATE automatic test equipment 16.

[0034] The bottom of the gas storage pipe 113 is connected to a gas supply pipe 115 for supplying nitrogen; the gas supply pipe 115 is used to provide nitrogen to the gas storage pipe 113. A one-way valve is provided in the gas supply pipe 115, and nitrogen can only enter the gas storage pipe 113 from the gas supply pipe 115.

[0035] In the embodiment, when the PCB board 99 follows the belt 22 to the bottom of the square cover 13, the belt 22 stops rotating, and at the same time, the No. 1 electric telescopic rod 18 extends to drive the square cover 13 to move downward, and the telescopic curtain 14 and the sealing strip 15 also move downward. The square cover 13, the telescopic curtain 14 and the sealing strip 15 form a retractable protective cover to cover the PCB board 99 on the belt 22, so that the PCB board 99 is isolated from the external environment, so that the subsequent voltage measurement will not be interfered with by the external environment, thereby improving the accuracy of the detection.

[0036] At the same time, when the sealing strip 15 contacts the base plate 12, the structure formed by the sleeve 19, the spring 112 and the No. 1 piston rod 110 is supportive, so that there is a mutual thrust between the sealing strip 15 and the base plate 12. At the same time, due to the elasticity of the telescopic curtain 14 itself, the square cover 13, the telescopic curtain 14 and the sealing strip 15 can be stably covered on the PCB board 99.

[0037] It should be noted that, because the height of the PCB board 99 is different, the distance sensor 17 (the distance sensor 17 is a prior art and will not be described in detail here) controls the telescopic length of the No. 1 electric telescopic rod 18 to be different, which ultimately makes the sliding distance of the No. 1 piston rod 110 in the sleeve 19 different. When the height of the PCB board 99 is higher, the telescopic length of the No. 1 electric telescopic rod 18 needs to be reduced. Therefore, the telescopic curtain 14 is stretched larger at this time, so that the cover formed by the square cover 13, the telescopic curtain 14 and the sealing strip 15 The space becomes larger, and at the same time, the sliding distance of the No. 1 piston rod 110 in the sleeve 19 becomes smaller, so that the gas inhaled by the air guide tube 111 is reduced (the upper end of the sleeve 19 is provided with an air outlet, and the lower end of the sleeve 19 is in a closed state. The piston disc on the No. 1 piston rod 110 slides in the sleeve 19, and a blowing and suction state can be formed in the air guide tube 111. At the same time, the sliding distance of the piston disc in the sleeve 19 determines the size of the suction and blowing amount), so that the gas sucked away from the airway 117 is reduced, so that The sliding plate 119 drives the second electric telescopic rod 118 to slide down a shorter distance, and finally shortens the overall length of the output shaft of the second electric telescopic rod 118 and the second piston rod 116 (the original setting is that the stroke distance of the second electric telescopic rod 118 in one operation is constant, so the shortening of the overall length of the output shaft of the second electric telescopic rod 118 and the second piston rod 116 will shorten the stroke distance of the second electric telescopic rod 118 in one operation, thereby making the second piston rod 116 drive the piston in the gas storage pipe 113 The distance moved in the gas pipe 114 is shorter than the preset distance), and finally more nitrogen enters the square cover 13 from the gas pipe 114, which can fill the space of the cover formed by the square cover 13, the telescopic curtain 14 and the sealing strip 15. After the detection is completed, the above components are automatically reset. At this time, the No. 2 piston rod 116 drives the piston to move upward in the gas storage pipe 113, forming suction. A one-way valve is provided in the gas pipe 114, and the gas can only enter the square cover 13 from the gas pipe 114, so that the same amount of nitrogen discharged before is inhaled from the gas supply pipe 115.

[0038] In summary, the length of the No. 1 electric telescopic rod 18 is controlled by the distance measuring sensor 17, thereby controlling the descending position of the square cover 13. When the height of the PCB board 99 is high, the telescopic curtain 14 is extended to a long length, so that the space of the cover formed by the square cover 13, the telescopic curtain 14 and the sealing strip 15 is large, so that the moving distance of the No. 1 piston rod 110 in the sleeve 19 is short, so that the gas guide tube 111 absorbs less gas in the air channel 117, so that the sliding disk 119 slides downwardly in the air channel 117. Finally, the output end of the No. 2 electric telescopic rod 118 and the overall length of the No. 2 piston rod 116 are slightly shortened. Therefore, when the No. 2 electric telescopic rod 118 works one stroke, a suitable volume of nitrogen can be filled into the space of the cover formed by the square cover 13, the telescopic curtain 14 and the sealing strip 15, preventing humidity, oxygen, etc. in the air from affecting the measurement accuracy.

[0039] The volume of the cover formed by the square cover 13, the telescopic curtain 14 and the sealing strip 15 can adaptively change with the height of the PCB board 99. At the same time, the amount of nitrogen filled into the cover formed by the square cover 13, the telescopic curtain 14 and the sealing strip 15 also changes with the volume of the cover formed by the square cover 13, the telescopic curtain 14 and the sealing strip 15. The two cooperate with each other to prevent insufficient or excessive nitrogen filling, which would cause waste.

[0040] like Figure 1 and Figure 2 As shown, a conveying mechanism 2 is provided below the detection mechanism 1, and the conveying mechanism 2 includes rotating rollers 21. Two groups of rotating rollers 21 are provided on the detection platform 11. A belt 22 for conveying the PCB board 99 is rotatably connected to the rotating rollers 21. The bottom plate 12 is located below the upper belt 22, and there is a gap between the two.

[0041] In the embodiment, a motor (not shown) drives the rotating roller 21 to rotate, and the rotating roller 21 drives the belt 22 to rotate. The user places the PCB board 99 to be tested on the belt 22. After the belt 22 drives the PCB board 99 to the testing area, the belt 22 pauses. After the test is completed, the belt 22 drives the PCB board 99 to move again.

[0042] like Figure 1 and Figure 2 As shown, a centering mechanism 3 is provided on both sides of the conveying mechanism 2, and the centering mechanism 3 includes an electric push rod 31. The electric push rod 31 is provided with two groups symmetrically distributed on both sides of the belt 22. The electric push rod 31 is fixedly connected to the detection table 11, and the output end of the electric push rod 31 faces the center of the belt 22. The output end of the electric push rod 31 is fixedly connected to a push plate 32, and the push plate 32 is slidably connected to the upper end surface of the upper belt 22.

[0043] In the embodiment, the electric push rod 31 will drive the push plate 32 to move toward the center of the belt 22 when working, and the push plates 32 on both sides will push the PCB board 99 to the middle of the belt 22, so as to facilitate the subsequent ATE automatic test equipment 16 (ATE automatic test equipment 16 is used to detect the welding quality, electrical connection and function of the PCB printed circuit board. It belongs to the existing technology and will not be elaborated here) to perform voltage detection.

[0044] like Figure 1 and Figure 3 As shown, a dust cleaning mechanism 4 is provided in the square cover 13, and the dust cleaning mechanism 4 includes an elastic metal sheet 42. The elastic metal sheet 42 is provided on the telescopic curtain 14. The bending shape of the elastic metal sheet 42 matches the telescopic curtain 14. The elastic metal sheet 42 and the telescopic curtain 14 are bent and stretched. The elastic metal sheet 42 is connected to the power supply 41 through a wire, and the power supply 41 is fixedly connected to the upper end face of the ATE automatic test equipment 16.

[0045] An air outlet 43 is fixedly connected to the inner wall of the square cover 13 . The air outlet 43 is arranged to be tilted downward, and the air supply pipe 115 is connected to the air outlet 43 .

[0046] In the embodiment, the gas pipe 114 sprays nitrogen from the gas outlet 43, and the gas outlet 43 is arranged to be tilted downward, so that the nitrogen can be blown onto the PCB board 99, so that the dust on the PCB board 99 is blown away, preventing the dust from affecting the voltage measurement. At the same time, since the power supply 41 supplies power to the elastic metal sheet 42, the elastic metal sheet 42 has an adsorption effect on the dust. After the dust on the PCB board 99 is blown away, it can be adsorbed by the elastic metal sheet 42, preventing the dust from floating away and remaining on the PCB board 99.

[0047] It should be noted that when the detection is completed, the power supply 41 stops supplying power to the elastic metal sheet 42. At this time, some of the dust on the elastic metal sheet 42 will fall off. At the same time, the No. 1 electric telescopic rod 18 drives the square cover 13, the telescopic curtain 14 and the sealing strip 15 to move upward. At this time, the telescopic curtain 14 and the elastic metal sheet 42 are stretched, so that the dust on the elastic metal sheet 42 is shaken off, which has a self-cleaning effect.

[0048] The workflow is as follows:

[0049] First, the user places the PCB board 99 to be tested on the belt 22. The electric push rod 31 drives the push plates 32 toward the center of the belt 22. The push plates 32 on either side push the PCB board 99 toward the middle of the belt 22. The belt 22 then moves the PCB board 99 to the testing area, where it pauses. The first electric telescopic rod 18 then extends, driving the square cover 13 downward. Simultaneously, the telescopic curtain 14 and sealing strip 15 also move downward. The square cover 13, telescopic curtain 14, and sealing strip 15 form a retractable protective sleeve that covers the PCB board 99 on the belt 22, isolating it from the external environment. This prevents subsequent voltage measurements from being disturbed by the external environment, improving test accuracy. During this process, the length of the No. 1 electric telescopic rod 18 is controlled by the distance measuring sensor 17, thereby controlling the descending position of the square cover 13. When the height of the PCB board 99 is high, the telescopic curtain 14 is extended to a long length, so that the space of the cover formed by the square cover 13, the telescopic curtain 14 and the sealing strip 15 is large, so that the moving distance of the No. 1 piston rod 110 in the sleeve 19 is short, so that the gas guide tube 111 absorbs less gas in the air channel 117, so that the sliding disk 119 slides downwardly in the air channel 117. Finally, the output end of the No. 2 electric telescopic rod 118 and the overall length of the No. 2 piston rod 116 are slightly shortened, so that when the No. 2 electric telescopic rod 118 works one stroke, a suitable volume of nitrogen can be filled into the space of the cover formed by the square cover 13, the telescopic curtain 14 and the sealing strip 15, preventing humidity, oxygen, etc. in the air from affecting the measurement accuracy. The volume of the enclosure formed by the square enclosure 13, the telescopic curtain 14, and the sealing strip 15 can adaptably change with the height of the PCB 99. Simultaneously, the amount of nitrogen gas filled into the enclosure also changes with the volume of the enclosure formed by the square enclosure 13, the telescopic curtain 14, and the sealing strip 15. These two factors work in concert to prevent waste caused by insufficient or excessive nitrogen gas. Simultaneously, the gas pipe 114 ejects nitrogen gas from the outlet 43, which is tilted downward. This allows the nitrogen gas to be blown onto the PCB 99, displacing dust on the PCB 99 and preventing it from affecting voltage measurement. Furthermore, the power supply 41 supplies power to the elastic metal sheet 42, which absorbs dust. Dust on the PCB 99 is then absorbed by the elastic metal sheet 42 after being blown away, preventing it from remaining on the PCB 99. When the detection is completed, the power supply 41 stops supplying power to the elastic metal sheet 42. At this time, some of the dust on the elastic metal sheet 42 will fall off. At the same time, the No. 1 electric telescopic rod 18 drives the square cover 13, the telescopic curtain 14 and the sealing strip 15 to move upward. At this time, the telescopic curtain 14 and the elastic metal sheet 42 are stretched, so that the dust on the elastic metal sheet 42 is shaken off, which has a self-cleaning effect.

[0050] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0051] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above-described embodiments. The above-described embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A PCB board voltage detection device, comprising a detection mechanism (1), wherein the detection mechanism (1) comprises a detection platform (11), characterized in that: A bottom plate (12) is provided on the test platform (11), a square cover (13) is provided above the bottom plate (12), an ATE automatic test device (16) is provided in the middle of the square cover (13), a telescopic curtain (14) is provided at the lower end of the square cover (13), a sealing strip (15) is provided below the telescopic curtain (14), the ATE automatic test device (16) is fixed to the side plate of the test platform (11) through a No. 1 electric telescopic rod (18), a sleeve (19) is provided at one end of the square cover (13), a No. 1 piston rod (110) is slidably connected in the sleeve (19), a piston end of the No. 1 piston rod (110) is fixedly connected to the upper wall of the sleeve (19) through a spring (112), and the No. 1 piston rod (110) is fixedly connected to the upper wall of the sleeve (19) through a spring (112). The other end is fixedly connected to the sealing strip (15), the sleeve (19) is communicated with the airway (117) through the air guide tube (111), the airway (117) is arranged in the No. 2 piston rod (116), the No. 2 piston rod (116) is slidably connected to the air storage pipe (113), the air storage pipe (113) is fixedly connected to the side plate of the detection platform (11), the bottom of the air storage pipe (113) is fixedly connected to the square cover (13) through the air delivery pipe (114), a sliding disk (119) is slidably connected in the airway (117), the upper part of the sliding disk (119) is fixedly connected to the output end of the No. 2 electric telescopic rod (118), and the No. 2 electric telescopic rod (118) is fixedly connected to the support frame of the detection platform (11).

2. The PCB voltage detection device as claimed in claim 1, characterized in that: The upper end surface of the square cover (13) is provided with a distance sensor (17) for detecting the height of the PCB circuit board (99).

3. The PCB voltage detection device as claimed in claim 2, characterized in that: The bottom of the gas storage pipe (113) is connected to a gas supply pipe (115) for supplying nitrogen.

4. The PCB voltage detection device as claimed in claim 3, wherein: A conveying mechanism (2) is provided below the detection mechanism (1), and the conveying mechanism (2) includes rotating rollers (21). Two groups of rotating rollers (21) are provided and both are provided on the detection platform (11). A belt (22) for conveying PCB boards is rotatably connected to the rotating rollers (21). The bottom plate (12) is located below the upper belt (22), and there is a gap between the two.

5. The PCB voltage detection device as claimed in claim 4, characterized in that: A centering mechanism (3) is provided on both sides of the conveying mechanism (2). The centering mechanism (3) includes an electric push rod (31). The electric push rod (31) is provided with two groups symmetrically distributed on both sides of the belt (22). The electric push rod (31) is fixedly connected to the detection table (11). The output end of the electric push rod (31) faces the center of the belt (22). The output end of the electric push rod (31) is fixedly connected to a push plate (32). The push plate (32) is slidably connected to the upper end surface of the upper belt (22).

6. The PCB voltage detection device as claimed in claim 5, characterized in that: A dust cleaning mechanism (4) is provided in the square cover (13), the dust cleaning mechanism (4) comprising an elastic metal sheet (42), a retractable curtain (14) provided with the elastic metal sheet (42), a bending shape of the elastic metal sheet (42) matching the retractable curtain (14), the elastic metal sheet (42) and the retractable curtain (14) being bent and stretched, the elastic metal sheet (42) being connected to a power source (41) via a wire, and the power source (41) being fixedly connected to the upper end face of an ATE automatic test device (16).

7. The PCB voltage detection device as claimed in claim 6, characterized in that: An air outlet (43) is fixedly connected to the inner wall of the square cover (13), the air outlet (43) is arranged to be inclined downward, and the air supply pipe (115) is communicated with the air outlet (43).

8. The PCB voltage detection device as claimed in claim 1, wherein: The connection position of the air guide tube (111) and the sleeve (19) is always located below the piston end on the No. 1 piston rod (110).

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