Calibration and test tool for gas chip

Abstract

The utility model discloses a calibration and test tool for a gas chip, and aims to overcome the defect that inconvenience is brought to calibration and test of the gas chip due to the fact that no special calibration and test tool for the gas chip exists in the market. The device comprises a circuit board, and a plurality of probes are installed on the circuit board. The groove plate is provided with a plurality of installation grooves, the gas chips are connected with the installation grooves in a matched mode, and the probes penetrate through the groove plate and make contact with the gas chips to achieve electric connection; the cover plate is pressed on the groove plate and tightly presses the gas chip, and vent holes are formed in the cover plate and correspond to the gas chip. According to the calibration and test tool of the gas chip, calibration and test of the gas chip are facilitated, calibration and test operation of a plurality of gas chips can be realized at a time, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of chip testing, and more specifically, to a gas chip calibration and testing tool. Background Art

[0002] At present, in the production process of gas sensor MEMS chips (such as ammonia, VOC, alcohol and other gas sensor MEMS chips, hereinafter referred to as gas chips), after the chip is packaged, it is necessary to apply standard gas to it for calibration and functional testing. During this calibration and testing process, the calibration test system and the gas chip need to communicate and read and write data, and the corresponding standard gas needs to be applied to the gas chip for calibration and testing. In order to facilitate the calibration and testing operations of the gas chip, it is necessary to use tooling to position the gas chip, but there is no calibration and testing tooling dedicated to gas chips on the market, which brings inconvenience to the calibration and testing of gas chips. Utility Model Content

[0003] In order to overcome the above-mentioned shortcomings, the utility model provides a calibration and testing tool for a gas chip, which facilitates the calibration and testing of the gas chip and can realize the calibration and testing operations of multiple gas chips at one time, thereby improving work efficiency.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solution: a calibration and testing tool for a gas chip, comprising:

[0005] A circuit board, with a plurality of probes mounted on the circuit board;

[0006] A slot plate, wherein a plurality of mounting slots are arranged on the slot plate, the gas chip is adapted to be connected with the mounting slots, and the probe penetrates the slot plate and contacts the gas chip to realize electrical connection;

[0007] The cover plate is pressed on the slot plate and presses the gas chip tightly, and ventilation holes are arranged on the cover plate and corresponding to the gas chip.

[0008] During the calibration and testing of the gas chip, place the gas chips one by one into the mounting slots on the slot plate, with the Pad portion of the gas chip facing downward, and in contact with the probe that penetrates the slot plate to achieve electrical connection. The cover plate is pressed onto the slot plate to press and fix the gas chip, so that the Pad of the gas chip and the probe are fully in contact and conductive, forming a reliable circuit path, thereby guiding the circuit to the test board of the gas chip. The air vents of the gas chip face the vents, and the entire tooling is placed in a standard gas environment (such as a gas box) to form a gas path. The sensitive surface of the gas chip can be in contact with the standard gas, and then the corresponding calibration and functional testing can be performed.

[0009] The calibration and testing tooling of the gas chip of the present application facilitates the calibration and testing of the gas chip, and can perform calibration and testing operations on multiple gas chips at one time, thereby improving work efficiency.

[0010] Preferably, a clamping plate is arranged between the circuit board and the slot plate, a positioning groove is arranged on the clamping plate, the slot plate is adaptively connected to the positioning groove, and the probe passes through the clamping plate.

[0011] The clamping plate is used as a transition structure between the circuit board and the slot plate. The positioning grooves arranged on the clamping plate realize the positioning of the slot plate, ensure the accuracy of the installation position of the slot plate, and improve the reliability of the installation.

[0012] Preferably, a groove is provided on the surface of the clamping plate facing the circuit board, and the probe penetrates the bottom surface of the groove.

[0013] The arrangement of the grooves on the clamping plate can avoid interference with components on the circuit board and can also improve the heat dissipation effect of the circuit board.

[0014] Preferably, corner grooves are provided at the corners of the installation groove, and notches are provided on the two opposite side walls of the installation groove.

[0015] The setting of corner grooves and notches facilitates the installation and grabbing of gas chips.

[0016] Preferably, the circuit board is connected to the bottom plate, the bottom plate is connected to the top plate, and the top plate presses the cover plate.

[0017] The arrangement of the bottom plate facilitates the installation of the circuit board and the top plate. The top plate is pressed tightly against the cover plate, ensuring that the cover plate can reliably press the gas chip.

[0018] Preferably, a plug plate is installed between the top plate and the cover plate, a flange is provided at the edge of the top plate, and the flange is pressed tightly against the plug plate.

[0019] When in use, the plug plate is inserted between the top plate and the cover plate to fix the cover plate. At the same time, the cover plate presses the gas chip, and the gas chip presses the probe to form a reliable contact, leading the electrical interface on the gas chip to the circuit board.

[0020] Preferably, two top plates are arranged opposite to each other, plug plates are installed between the two top plates and the cover plate, notches are arranged on the edges of the plug plates, and the flanges are fitted and pressed tightly on the notches.

[0021] The two top plates are arranged opposite to each other, so that the pressing force on the cover plate is more stable. The notch on the edge of the plug plate is matched with the flange on the edge of the top plate, which ensures the reliability of the pressing.

[0022] Preferably, a plurality of positioning posts are connected to the bottom plate, and positioning holes corresponding to the positioning posts are arranged on the circuit board, the slot plate and the cover plate, and the positioning posts are inserted into the positioning holes to achieve positioning.

[0023] During the entire tooling assembly process, the positioning columns play a positioning role, allowing each component to be quickly installed in place.

[0024] Preferably, a sinking groove and an avoidance groove are provided on the bottom plate, the probe is placed within the range of the sinking groove, and the avoidance groove avoids components on the circuit board.

[0025] The setting of the sinking groove prevents the probe from interfering with the bottom plate, and can also play a role in heat dissipation. The setting of the avoidance groove prevents the components on the circuit board from interfering with the bottom plate.

[0026] Preferably, the probe comprises a fixed column and a movable column, an elastic body is installed between the fixed column and the movable column, a connecting sleeve is sleeved outside the fixed column, and the connecting sleeve is tightly connected to the fixed column.

[0027] The elastic body is installed between the fixed column and the movable column, so that the movable column has elasticity, the contact between the movable column and the gas chip has a buffer, and the contact connection is more reliable.

[0028] Compared with the prior art, the beneficial effects of the present invention are: (1) the calibration and testing tooling of the gas chip of the present application facilitates the calibration and testing of the gas chip, and can realize the calibration and testing operations of multiple gas chips at one time, thereby improving work efficiency; (2) the positioning of the entire tooling assembly process is accurate and reliable, which is conducive to improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the utility model;

[0030] Figure 2 It is an exploded view of the utility model;

[0031] Figure 3 It is a schematic diagram of the connection between the slot plate and the clamping plate of the utility model;

[0032] Figure 4 It is a schematic diagram of the back structure of the circuit board of the utility model;

[0033] Figure 5 It is a schematic diagram of the back structure of the splint of the utility model;

[0034] Figure 6 is a cross-sectional view of the probe connection of Example 2 of the utility model;

[0035] In the figure: 1. gas chip, 2. circuit board, 3. probe, 4. slot plate, 5. mounting slot, 6. cover plate, 7. vent, 8. splint, 9. positioning slot, 10. groove, 11. corner slot, 12. notch, 13. bottom plate, 14. top plate, 15. plug plate, 16. flange, 17. notch, 18. clamping slot, 19. positioning column, 20. positioning hole, 21. sinking slot, 22. avoidance slot, 23. fixed column, 24. movable column, 25. elastomer, 26. loading and unloading slot. DETAILED DESCRIPTION

[0036] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0037] Example 1: A gas chip calibration and testing tool (see attached Figure 1 To Attachment Figure 5 ),include:

[0038] A circuit board 2, on which a plurality of probes 3 are installed, the circuit board 2 is a PCBA chip test board, the probes 3 are arranged in a plurality of rows, the probes 3 are elastic and welded on the circuit board 2; a USB interface is arranged on the circuit board 2, and the connection between the circuit board 2 and an external calibration test system is realized through a USB connection line;

[0039] A slot plate 4 is provided with a plurality of mounting slots 5. The slot plate 4 is machined from an epoxy resin plate, and a plurality of mounting slots 5 are machined on the top surface according to the shape of the gas chip 1. The gas chip 1 is adapted to be connected with the mounting slots 5. The probe 3 penetrates the slot plate 4 and contacts the gas chip 1 to realize electrical connection.

[0040] The cover plate 6 is pressed on the slot plate 4 and presses the gas chip 1. The cover plate 6 and the gas chip 1 are provided with ventilation holes 7. It is made of bakelite material and is used to cover all the cores on the slot plate 4. A ventilation hole 7 is drilled at the central ventilation hole of each gas chip 1 to allow the standard gas for calibration test to pass to the sensitive surface of the gas chip 1.

[0041] A clamping plate 8 is arranged between the circuit board 2 and the slot plate 4, a positioning groove 9 is arranged on the clamping plate 8, the slot plate 4 is adapted to be connected with the positioning groove 9, and the probe 3 passes through the clamping plate 8. The clamping plate 8 is machined from an epoxy resin board and is used as a transition structure for the gas chip 1 to test the circuit board 2 and the slot plate 4. A groove 10 is arranged on the surface of the clamping plate 8 facing the circuit board 2, and the probe 3 passes through the bottom surface of the groove 10.

[0042] Corner grooves 11 are set at the corners of the mounting grooves 5 on the groove plate 4, and notches 12 are set on the opposite side walls of the mounting grooves 5. During the process of installing the gas chip 1 into the mounting grooves 5 and in the process of grabbing the gas chip 1 from the mounting grooves 5, the corner grooves 11 and the notches 12 are left as gaps between the edge of the gas chip 1 and the mounting grooves 5, which facilitates the installation and grabbing operations of the gas chip 1.

[0043] The circuit board 2 is connected to the bottom plate 13, the bottom plate 13 is connected to the top plate 14, and the top plate 14 presses the cover plate 6. A plug plate 15 is installed between the top plate 14 and the cover plate 6, and a flange 16 is provided on the edge of the top plate 14, and the flange 16 is pressed on the plug plate 15. Two top plates 14 are arranged opposite to each other, and plug plates 15 are installed between the two top plates 14 and the cover plate 6. A notch 17 is provided on the edge of the plug plate 15, and the flange 16 is adapted to be pressed at the notch 17. The plug plate 15 is an isosceles trapezoidal structure, and a clamping groove 18 adapted to the plug plate 15 is provided on the top plate 14, and the top plate 14 is installed in the clamping groove 18. Two positioning columns 19 are connected to the bottom plate 13, and positioning holes 20 corresponding to the positioning columns 19 are provided on the circuit board 2, the clamping plate 8, the slot plate 4 and the cover plate 6, and the positioning columns 19 are inserted into the positioning holes 20 to achieve positioning. The bottom plate 13, the circuit board 2, the clamping plate 8, and the top plate 14 are stacked and fastened by bolts. A sinking groove 21 and an avoidance groove 22 are provided on the bottom plate 13 . The probe 3 is placed within the range of the sinking groove 21 . The avoidance groove 22 avoids components on the circuit board 2 .

[0044] Specifically, Figure 1 , Figure 2 As shown, the whole tooling is a multi-layer structure, which includes a bottom plate 13, a circuit board 2, a clamping plate 8, a slot plate 4, a cover plate 6, a plug plate 15 and a top plate 14 from bottom to top, and the bottom plate 13, the circuit board 2, the clamping plate 8 and the top plate 14 are fastened together by a plurality of bolts. The plug plate 15, the cover plate 6 and the slot plate 4 are clamped between the top plate 14 and the clamping plate 8. A plurality of through holes are provided on the plug plate 15 where the cover plate 6 is pressed, and the through holes and the vent holes 7 on the cover plate 6 are provided correspondingly to ensure the unobstructed flow of the vent holes 7.

[0045] Two front-to-back positioning posts 19 are arranged on the bottom plate 13. The positioning posts 19 pass through the circuit board 2, the clamping plate 8, the slot plate 4, and the cover plate 6 in sequence. When installing, the positioning holes 20 on the circuit board 2, the clamping plate 8, the slot plate 4, and the cover plate 6 are aligned with the positioning posts 19 and then inserted downward. The installation position is accurate and reliable. The bottom plate 13 is provided with an avoidance groove 22, such as Figure 4 As shown, the electronic components installed on the lower surface of the circuit board 2 and at the corresponding position of the avoidance groove 22 can avoid the bottom plate 13 to prevent interference. A sinking groove 21 is set in the middle of the bottom plate 13, and the probe 3 is placed within the range of the sinking groove 21 to avoid the probe 3 from touching the surface of the bottom plate 13.

[0046] The circuit board 2 adopts a PCBA chip test board. Four probes 3 are welded on the circuit board 2 corresponding to each gas chip 1. Through holes are set on the clamping plate 8 corresponding to the probes 3. Extension holes are set on the bottom surface of the mounting slot 5 on the slot plate 4 corresponding to the probes 3. The probes 3 pass through the through holes and the extension holes in turn, and the upper ends of the probes 3 are exposed in the mounting slot 5.

[0047] like Figure 3 As shown, a positioning groove 9 is provided on the upper surface of the clamping plate 8, and the slot plate 4 is adapted to be installed together with the positioning groove 9, and a slot hole is provided at the corner position of the positioning groove 9, and loading and unloading grooves 26 are provided on the front and rear edges of the clamping plate 8, and the loading and unloading grooves 26 are connected with the positioning groove 9. The setting of the loading and unloading grooves 26 facilitates the installation and removal of the slot plate 4. The slot plate 4 is provided with a mounting groove 5 corresponding to the gas chip 1, and the four corner positions of the mounting groove 5 are provided with corner grooves 11, and the opposite side walls of the mounting groove 5 are provided with notches 12. During the installation and removal of the gas chip 1, the corner grooves 11 and the notches 12 provide an operating space, which facilitates the installation and removal of the gas chip 1. As shown Figure 5 As shown, a groove 10 is provided on the lower surface of the clamping plate 8 , and the probes 3 pass through the bottom surface of the groove 10 , and the probes 3 are arranged within the range where the groove 10 is located.

[0048] The cover plate 6 is pressed against the slot plate 4, and the lower surface of the cover plate 6 fits the upper surface of the slot plate 4. When the gas chip 1 is installed, the upper surface of the gas chip 1 is slightly higher than the upper surface of the slot plate 4. After the cover plate 6 is pressed, the gas chip 1 is pressed downward, so that the gas chip 1 can reliably contact the probe 3. Two isosceles trapezoidal plug plates 15 are respectively inserted between the top plate 14 and the cover plate 6, so that the cover plate 6 presses the gas chip 1.

[0049] During the calibration and testing of the gas chip 1, the gas chips 1 are placed one by one in the mounting slots 5 on the slot plate 4, with the Pad portion of the gas chip 1 facing downward, and in contact with the probe 3 that penetrates the slot plate 4 to achieve electrical connection. The cover plate 6 is pressed onto the slot plate 4 to press and fix the gas chip 1, so that the Pad of the gas chip 1 is in full contact and conduction with the probe 3, forming a reliable circuit path, thereby guiding the circuit to the test board of the gas chip 1. The air vent of the gas chip 1 faces the air vent 7, and the entire tooling is placed in a standard gas environment (such as a gas box) to form a gas path. The sensitive surface of the gas chip 1 can be in contact with the standard gas, and then the corresponding calibration and functional testing can be performed.

[0050] Example 2: A calibration and testing tool for a gas chip (see Appendix Figure 6 ),include:

[0051] A circuit board 2, on which a plurality of probes 3 are installed, the circuit board 2 is a PCBA chip test board, the probes 3 are arranged in a plurality of rows, the probes 3 are elastic and welded on the circuit board 2; a USB interface is arranged on the circuit board 2, and the connection between the circuit board 2 and an external calibration test system is realized through a USB connection line;

[0052] A slot plate 4 is provided with a plurality of mounting slots 5. The slot plate 4 is machined from an epoxy resin plate, and a plurality of mounting slots 5 are machined on the top surface according to the shape of the gas chip 1. The gas chip 1 is adapted to be connected with the mounting slots 5. The probe 3 penetrates the slot plate 4 and contacts the gas chip 1 to realize electrical connection.

[0053] The cover plate 6 is pressed on the slot plate 4 and presses the gas chip 1. The cover plate 6 and the gas chip 1 are provided with ventilation holes 7. It is made of bakelite material and is used to cover all the cores on the slot plate 4. A ventilation hole 7 is drilled at the central ventilation hole of each gas chip 1 to allow the standard gas for calibration test to pass to the sensitive surface of the gas chip 1.

[0054] A clamping plate 8 is arranged between the circuit board 2 and the slot plate 4, a positioning groove 9 is arranged on the clamping plate 8, the slot plate 4 is adapted to be connected with the positioning groove 9, and the probe 3 passes through the clamping plate 8. The clamping plate 8 is machined from an epoxy resin board and is used as a transition structure for the gas chip 1 to test the circuit board 2 and the slot plate 4. A groove 10 is arranged on the surface of the clamping plate 8 facing the circuit board 2, and the probe 3 passes through the bottom surface of the groove 10.

[0055] Corner grooves 11 are set at the corners of the mounting grooves 5 on the groove plate 4, and notches 12 are set on the opposite side walls of the mounting grooves 5. During the process of installing the gas chip 1 into the mounting grooves 5 and in the process of grabbing the gas chip 1 from the mounting grooves 5, the corner grooves 11 and the notches 12 are left as gaps between the edge of the gas chip 1 and the mounting grooves 5, which facilitates the installation and grabbing operations of the gas chip 1.

[0056] The circuit board 2 is connected to the bottom plate 13, the bottom plate 13 is connected to the top plate 14, and the top plate 14 presses the cover plate 6. A plug plate 15 is installed between the top plate 14 and the cover plate 6, and a flange 16 is provided on the edge of the top plate 14, and the flange 16 is pressed on the plug plate 15. Two top plates 14 are arranged opposite to each other, and plug plates 15 are installed between the two top plates 14 and the cover plate 6. A notch 17 is provided on the edge of the plug plate 15, and the flange 16 is adapted to be pressed at the notch 17. The plug plate 15 is an isosceles trapezoidal structure, and a clamping groove 18 adapted to the plug plate 15 is provided on the top plate 14, and the top plate 14 is installed in the clamping groove 18. Two positioning columns 19 are connected to the bottom plate 13, and positioning holes 20 corresponding to the positioning columns 19 are provided on the circuit board 2, the clamping plate 8, the slot plate 4 and the cover plate 6, and the positioning columns 19 are inserted into the positioning holes 20 to achieve positioning. The bottom plate 13, the circuit board 2, the clamping plate 8, and the top plate 14 are stacked and fastened by bolts. A sinking groove 21 and an avoidance groove 22 are provided on the bottom plate 13 . The probe 3 is placed within the range of the sinking groove 21 . The avoidance groove 22 avoids components on the circuit board 2 .

[0057] like Figure 6 As shown, the probe 3 includes a fixed column 23 and a movable column 24, an elastic body 25 is installed between the fixed column 23 and the movable column 24, and the elastic body 25 is a spring. The fixed column 23 is covered with a connecting sleeve, and the connecting sleeve is tightly connected to the fixed column 23. The upper end of the movable column 24 is higher than the connecting sleeve. The fixed column 23 is welded to the circuit board 2, and the upper end of the connecting sleeve is exposed from the bottom surface of the mounting groove 5. A convex ring is arranged on the upper part of the connecting sleeve, and a convex column is arranged on the lower part of the movable column 24. The convex column is adapted to the inner wall of the connecting sleeve. The upper part of the movable column 24 is movably covered with the convex ring, and the movable column 24 is in contact with the connecting sleeve for electrical connection.

[0058] Specifically, Figure 1 , Figure 2 As shown, the whole tooling is a multi-layer structure, which includes a bottom plate 13, a circuit board 2, a clamping plate 8, a slot plate 4, a cover plate 6, a plug plate 15 and a top plate 14 from bottom to top, and the bottom plate 13, the circuit board 2, the clamping plate 8 and the top plate 14 are fastened together by a plurality of bolts. The plug plate 15, the cover plate 6 and the slot plate 4 are clamped between the top plate 14 and the clamping plate 8. A plurality of through holes are provided on the plug plate 15 where the cover plate 6 is pressed, and the through holes and the vent holes 7 on the cover plate 6 are provided correspondingly to ensure the unobstructed flow of the vent holes 7.

[0059] Two front-to-back positioning posts 19 are arranged on the bottom plate 13. The positioning posts 19 pass through the circuit board 2, the clamping plate 8, the slot plate 4, and the cover plate 6 in sequence. When installing, the positioning holes 20 on the circuit board 2, the clamping plate 8, the slot plate 4, and the cover plate 6 are aligned with the positioning posts 19 and then inserted downward. The installation position is accurate and reliable. The bottom plate 13 is provided with an avoidance groove 22, such as Figure 4As shown, the electronic components installed on the lower surface of the circuit board 2 and at the corresponding position of the avoidance groove 22 can avoid the bottom plate 13 to prevent interference. A sinking groove 21 is set in the middle of the bottom plate 13, and the probe 3 is placed within the range of the sinking groove 21 to avoid the probe 3 from touching the surface of the bottom plate 13.

[0060] The circuit board 2 adopts a PCBA chip test board. Four probes 3 are welded on the circuit board 2 corresponding to each gas chip 1. Through holes are set on the clamping plate 8 corresponding to the probes 3. Extension holes are set on the bottom surface of the mounting slot 5 on the slot plate 4 corresponding to the probes 3. The probes 3 pass through the through holes and the extension holes in turn, and the upper ends of the probes 3 are exposed in the mounting slot 5.

[0061] like Figure 3 As shown, a positioning groove 9 is provided on the upper surface of the clamping plate 8, and the slot plate 4 is adapted to be installed together with the positioning groove 9, and a slot hole is provided at the corner position of the positioning groove 9, and loading and unloading grooves 26 are provided on the front and rear edges of the clamping plate 8, and the loading and unloading grooves 26 are connected with the positioning groove 9. The setting of the loading and unloading grooves 26 facilitates the installation and removal of the slot plate 4. The slot plate 4 is provided with a mounting groove 5 corresponding to the gas chip 1, and the four corner positions of the mounting groove 5 are provided with corner grooves 11, and the opposite side walls of the mounting groove 5 are provided with notches 12. During the installation and removal of the gas chip 1, the corner grooves 11 and the notches 12 provide an operating space, which facilitates the installation and removal of the gas chip 1. As shown Figure 5 As shown, a groove 10 is provided on the lower surface of the clamping plate 8 , and the probes 3 pass through the bottom surface of the groove 10 , and the probes 3 are arranged within the range where the groove 10 is located.

[0062] The cover plate 6 is pressed against the slot plate 4, and the lower surface of the cover plate 6 fits the upper surface of the slot plate 4. When the gas chip 1 is installed, the upper surface of the gas chip 1 is slightly higher than the upper surface of the slot plate 4. After the cover plate 6 is pressed, the gas chip 1 is pressed downward, so that the gas chip 1 can reliably contact the probe 3. Two isosceles trapezoidal plug plates 15 are respectively inserted between the top plate 14 and the cover plate 6, so that the cover plate 6 presses the gas chip 1.

[0063] During the calibration and testing of the gas chip 1, the gas chips 1 are placed one by one in the mounting slots 5 on the slot plate 4, with the Pad portion of the gas chip 1 facing downward, and in contact with the probe 3 that penetrates the slot plate 4 to achieve electrical connection. The cover plate 6 is pressed onto the slot plate 4 to press and fix the gas chip 1, so that the Pad of the gas chip 1 is in full contact and conduction with the probe 3, forming a reliable circuit path, thereby guiding the circuit to the test board of the gas chip 1. The air vent of the gas chip 1 faces the air vent 7, and the entire tooling is placed in a standard gas environment (such as a gas box) to form a gas path. The sensitive surface of the gas chip 1 can be in contact with the standard gas, and then the corresponding calibration and functional testing can be performed.

[0064] The above-described embodiments are only preferred solutions of the present invention and are not intended to limit the present invention in any form. Other variations and modifications are possible without exceeding the technical solutions described in the claims.

Claims

1. A gas chip calibration and testing tool, characterized in that: include: A circuit board, with a plurality of probes mounted on the circuit board; A slot plate, wherein a plurality of mounting slots are arranged on the slot plate, the gas chip is adapted to be connected with the mounting slots, and the probe penetrates the slot plate and contacts the gas chip to realize electrical connection; The cover plate is pressed on the slot plate and presses the gas chip tightly, and ventilation holes are arranged on the cover plate and corresponding to the gas chip.

2. A gas chip calibration and testing tool according to claim 1, characterized in that: A clamping plate is arranged between the circuit board and the slot plate, a positioning groove is arranged on the clamping plate, the slot plate is adapted and connected with the positioning groove, and the probe passes through the clamping plate.

3. A gas chip calibration and testing tool according to claim 2, characterized in that: A groove is arranged on the surface of the clamping plate facing the circuit board, and the probe penetrates through the bottom surface of the groove.

4. A gas chip calibration and testing tool according to claim 1, characterized in that: Corner grooves are arranged at the corners of the installation grooves, and notches are arranged on the two opposite side walls of the installation grooves.

5. A gas chip calibration and testing tool according to claim 1, characterized in that: The circuit board is connected to the bottom plate, the bottom plate is connected to the top plate, and the top plate presses the cover plate.

6. A gas chip calibration and testing tool according to claim 5, characterized in that: A plug plate is installed between the top plate and the cover plate, a flange is arranged on the edge of the top plate, and the flange is pressed tightly on the plug plate.

7. A gas chip calibration and testing tool according to claim 6, characterized in that: Two top plates are arranged opposite to each other, plug plates are installed between the two top plates and the cover plate, notches are arranged on the edges of the plug plates, and flanges are fitted and pressed tightly on the notches.

8. A gas chip calibration and testing tool according to claim 5, characterized in that: A plurality of positioning posts are connected to the bottom plate, and positioning holes corresponding to the positioning posts are arranged on the circuit board, the slot plate and the cover plate, and the positioning posts are inserted into the positioning holes to realize positioning.

9. A gas chip calibration and testing tool according to claim 5, characterized in that: A sinking groove and an avoidance groove are arranged on the bottom plate, the probe is placed within the range of the sinking groove, and the avoidance groove realizes avoidance of components on the circuit board.

10. A gas chip calibration and testing tool according to any one of claims 1 to 9, characterized in that: The probe comprises a fixed column and a movable column, an elastic body is installed between the fixed column and the movable column, a connecting sleeve is sleeved outside the fixed column, and the connecting sleeve is tightly connected with the fixed column.

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