MEMS gas sensitive material testing system

Abstract

The MEMS gas sensitive material testing system comprises a base and a circuit assembly, the circuit assembly comprises a pin plate, the upper surface of the pin plate is electrically connected with a clamp, and a gas sensitive sensor is arranged in the clamp; at least two magnetic suction connector plug ends are welded on the lower surface of the pin plate; the wiring board is mounted below the base; the socket end of the magnetic connector is welded on the upper surface of the wiring board; the magnetic suction connector plug end is adsorbed on the top surface of the magnetic suction connector socket end by using magnetic force, and the pin board, the magnetic suction connector plug end, the magnetic suction connector socket end and the wiring board are combined together to form a signal path; the gas sensitive sensor acquires gas concentration information and then transmits the gas concentration information through the pin board, the magnetic connector plug end, the magnetic connector socket end and the wiring board; the plug end of the magnetic connector is separated from the socket end of the magnetic connector, and the pin plate, the corresponding plug end of the magnetic connector and the clamp are replaced, so that another gas test is carried out.

Description

Technical Field

[0001] This invention relates to the field of MEMS gas sensor technology, and more specifically to a MEMS gas-sensitive material testing system. Background Technology

[0002] After a gas-sensitive material testing device completes a test on a single gas, it needs to be cleaned to ensure it's in pristine condition before proceeding with the next test. Continuous testing could lead to cross-contamination, affecting accuracy. When testing multiple gases, using a single device and repeating the cleaning process multiple times after each test is cumbersome, time-consuming, and inconvenient. Summary of the Invention

[0003] The purpose of this invention is to provide a MEMS gas-sensitive material testing system. Through the cooperation of the magnetic structure at the plug end and the socket end of the magnetic connector, the sensor can be easily replaced to meet the needs of continuous gas testing.

[0004] The MEMS gas-sensitive material testing system includes a base and a circuit assembly. The circuit assembly includes a pin plate, on the upper surface of which a clamp is electrically connected, and a gas-sensitive sensor is disposed within the clamp. At least two of the magnetic connector plug ends are soldered to the lower surface of the pin plate; A junction box, which is installed below the base; At least two of the magnetic connector socket ends are soldered to the upper surface of the terminal block; In the vertical direction, the magnetic connector plug end is magnetically attached to the top surface of the magnetic connector socket end, and the pin plate, the magnetic connector plug end, the magnetic connector socket end and the terminal block are combined together to form a signal path; The gas sensor inside the fixture collects gas concentration information, and then the gas sensor transmits the gas concentration information through the pin plate, the plug end of the magnetic connector, the socket end of the magnetic connector, and the terminal block; After completing one gas concentration test, the magnetic connector plug is separated from the magnetic connector socket to replace another pin plate and the corresponding magnetic connector plug and clamp for another gas concentration test.

[0005] Preferably, the positive terminal of the magnetic connector plug and the negative terminal of the magnetic connector socket are magnetically attracted together, and the negative terminal of the magnetic connector plug and the positive terminal of the magnetic connector socket are magnetically attracted together.

[0006] Preferably, at least two of the clamps are provided on the pin plate for multi-channel testing of the gas.

[0007] Preferably, the fixture includes a fixture base, a gas sensor is disposed in a groove at the top of the fixture base, and a fixture cover is magnetically attached to the top of the fixture base to fix the gas sensor; an air inlet is provided in the fixture cover, and gas comes into contact with the gas sensor after passing through the air inlet.

[0008] Preferably, the base includes a base, the middle of which is a support portion, and a plurality of mounting holes are formed in the support portion along the vertical direction; a mounting groove is formed at the bottom of the support portion; the wiring board is installed in the mounting groove; the pin plate is supported on the support portion; the plug end of the magnetic connector and the socket end of the magnetic connector pass through the mounting holes and are attracted together.

[0009] Preferably, a first mounting groove is provided on the upper part of the base around the supporting part, and the first mounting groove is used to install the cover.

[0010] Preferably, a baffle is formed on the top of each end of the base; a stop block is provided near each end of the base; a second mounting groove is formed between the baffle and the stop block; in the length direction of the base, the area defined by the two second mounting grooves is larger than the area defined by the first mounting groove, for mounting a larger cover.

[0011] Preferably, it also includes a high-temperature ceramic heating element, which is installed at one end of the upper surface of the base. When the high-temperature ceramic heating element is powered on, it heats up and causes the liquid or gas to be tested inside the cover to evaporate.

[0012] Preferably, it also includes a fan, which is mounted on the upper surface of the base. The fan blows air to cause the gas to be tested to flow with the airflow and come into contact with the gas sensor for testing.

[0013] The advantages of this invention are as follows: The gas sensor within the fixture collects gas concentration information and transmits this information to an external signal analysis device via the pin plate, the magnetic connector plug, the magnetic connector socket, and the wiring board, completing one gas concentration test. Subsequently, when a subsequent gas test is required, the magnetic connector plug is first detached from the magnetic connector socket, and the used pin plate, fixture, and built-in gas sensor are removed. A new pin plate is then installed, and the magnetic connector plug is placed in the mounting hole. The magnetic connector plug and socket are magnetically attracted, completing the replacement of the pin plate, fixture, and gas sensor for the next gas test. By continuously replacing the pin plate, fixture, and gas sensor for multiple gas tests, cleaning of the fixture and gas sensor is eliminated each time, and the influence of previous tests on the current test is avoided, making the operation simple and efficient. Attached Figure Description

[0014] Figure 1 This is a structural diagram of the circuit components in this embodiment.

[0015] Figure 2 This is a structural diagram of the base, fixture, and circuit components assembled in this embodiment.

[0016] Figure 3 This is a structural diagram of the base in this embodiment.

[0017] Figure 4 This is a rear view of the base in this embodiment.

[0018] Figure 5 This is a structural diagram of the fixture in this embodiment.

[0019] Figure 6 This is a structural diagram of the combination of the cover and the base in this embodiment.

[0020] Figure label: 1. Cover; 2. Base; 21. Base; 22. Supporting part; 23. First mounting slot; 24. Baffle; 25. Second mounting slot; 26. Stop block; 27. Mounting hole; 28. Mounting slot; 3. Fixture; 31. Fixture cover; 32. Fixture base; 4. Circuit assembly; 41. Pin board; 42. Magnetic connector plug end; 43. Magnetic connector socket end; 44. Terminal block; 5. Fan; 6. High-temperature ceramic heating element. Detailed Implementation

[0021] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0022] In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" used to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0023] If a single testing device is used, it needs to be cleaned after each test before the next test can be conducted. If multiple tests are required, the cleaning process needs to be repeated multiple times, which is cumbersome, time-consuming, and inconvenient.

[0024] To address the aforementioned technical problems, this embodiment provides a MEMS gas-sensitive material testing system, referring to... Figure 1 The MEMS gas-sensitive material testing system includes a base 2 and a circuit assembly 4.

[0025] The circuit assembly 4 includes a pin plate 41, on the upper surface of which a clamp 3 is electrically connected. A gas sensor is provided inside the clamp 3, and the gas sensor is used to test the concentration of gas.

[0026] At least two magnetic connector plug ends 42 are welded to the lower surface of the pin plate 41. In this embodiment, six magnetic connector plug ends 42 are welded to the lower surface of the pin plate 41. Four of the magnetic connector plug ends 42 are arranged parallel to each other, and the other two are arranged parallel to each other. The arrangement direction of the four magnetic connector plug ends 42 is perpendicular to the arrangement direction of the other two, which improves the stability of the support for the pin plate 41.

[0027] A junction box 44 is mounted below the base 2. The junction box 44 is connected to a gas signal analysis device via a data cable. The gas signal analysis device is existing technology and will not be described in detail here.

[0028] The magnetic connector socket end 43 is soldered to the upper surface of the terminal block 44.

[0029] The number of magnetic connector socket ends 43 is the same as the number of magnetic connector plug ends 42, and the arrangement position of the magnetic connector socket ends 43 on the terminal block 44 is the same as the arrangement position of the magnetic connector plug ends 42 on the pin plate 41. The magnetic connector socket ends 43 and the magnetic connector plug ends 42 correspond one-to-one.

[0030] Reference Figure 1 In the vertical direction, the magnetic connector plug end 42 is magnetically attached to the top surface of the magnetic connector socket end 43. The pins of the magnetic connector plug end 42 and the pins of the magnetic connector socket end 43 are electrically connected. The pin plate 41, the magnetic connector plug end 42, the magnetic connector socket end 43 and the terminal block 44 are combined together to form a signal path.

[0031] The pins of the fixture 3 are electrically connected to the pin plate 41. During the gas concentration test, the gas sensor inside the fixture 3 collects gas concentration information and transmits it to the signal analysis device through the pin plate 41, the magnetic connector plug end 42, the magnetic connector socket end 43, and the terminal block 44. The signal analysis device is prior art and will not be described in detail here.

[0032] The magnetic connector plug end 42 and the magnetic connector socket end 43 are magnetically attracted together, allowing for easy disassembly. If multiple gas concentration tests are required, after each test, the magnetic connector plug end 42 is detached from the magnetic connector socket end 43, and the previously used pin plate 41, the matching magnetic connector plug end 42, and the clamp 3 are removed.

[0033] Next, another pin plate 41, the matching magnetic connector plug end 42, and the clamp 3 are installed on the magnetic connector socket end 43. Specifically, the magnetic connector plug end 42 is magnetically attached to the magnetic connector socket end 43, thereby replacing one pin plate 41, a new clamp 3, and a new gas sensor for the next gas concentration test. This process does not require cleaning of the previously used clamp 3 and gas sensor, making the operation simple, convenient, and efficient. Furthermore, using the newly replaced clamp 3 and gas sensor for gas concentration testing will not be affected by the previous gas.

[0034] Reference Figure 1 The positive terminal of the magnetic connector plug end 42 and the negative terminal of the magnetic connector socket end 43 are magnetically attracted together, and the negative terminal of the magnetic connector plug end 42 and the positive terminal of the magnetic connector socket end 43 are magnetically attracted together.

[0035] The magnetic connector plug end 42 and the magnetic connector socket end 43 are installed by matching positive and negative magnetic poles. That is, when the magnetic poles of the magnetic connector plug end 42 and the magnetic connector socket end 43 do not meet the matching requirements of positive and negative magnetic poles, they cannot be combined together. Matching the positive and negative magnetic poles facilitates the accurate and efficient combination of the magnetic connector plug end 42 and the magnetic connector socket end 43, and achieves reverse connection prevention.

[0036] Reference Figure 2 At least two clamps 3 are provided on the pin plate 41 for multi-channel testing of gas.

[0037] In this embodiment, one of the pin plates 41 is provided with 16 clamps 3, arranged in 4 rows, with 4 clamps 3 in each row. Each clamp 3 is electrically connected to a gas sensor, and the 16 gas sensors simultaneously test the gas concentration, realizing multi-channel gas acquisition. Multi-channel provides hardware redundancy, which can overcome the risk of failure of a single sensor and improve the stability of the MEMS gas-sensitive material testing system.

[0038] Reference Figure 5 The clamp 3 includes a clamp base 32, in which a gas sensor is placed and electrically connected to the clamp base 32. A clamp cover 31 is magnetically attached to the top of the clamp base 32 to cover and fix the gas sensor.

[0039] An air inlet is provided inside the clamp cover 31 to connect the internal space of the clamp base 32 with the external environment. Gas enters the internal space of the clamp base 32 through the air inlet and comes into contact with the gas sensor, which then measures the gas concentration.

[0040] Reference Figure 3 and Figure 4 The base 2 includes a base 21, with a support portion 22 in the middle. Multiple mounting holes 27 are formed vertically within the support portion 22. In this embodiment, the number of mounting holes 27 and the... The number of magnetic connector plug ends 42 is the same, and the position of the mounting hole 27 on the support part 22 corresponds to the position of the magnetic connector plug end 42 on the pin plate 41.

[0041] A mounting groove 28 is provided at the bottom of the support portion 22, and the wiring plate 44 is installed in the mounting groove 28. The pin plate 41 is supported on the top of the support portion 22, and the magnetic connector plug end 42 and the magnetic connector socket end 43 pass through the mounting hole 27 and are attracted together. The magnetic connector socket end 43 is inserted into the mounting hole 27, and hot melt adhesive is applied to the contact gap between the magnetic connector socket end 43 and the mounting hole 27 for sealing, resulting in good airtightness.

[0042] Reference Figure 3 A first mounting groove 23 is formed on the upper part of the base 21 around the support portion 22. The first mounting groove 23 is used to mount the cover 1. In this embodiment, the first mounting groove 23 is rectangular.

[0043] Reference Figure 3 and Figure 6 A baffle 24 is formed on the top of each end of the base 21, and a stop block 26 is provided near each end of the base 21. A second mounting groove 25 is formed between the baffle 24 and the stop block 26. In this embodiment, the baffle 24 is a flat U-shaped structure, the stop block 26 is located inside the U-shaped structure, and the gap between the stop block 26 and the U-shaped structure forms the second mounting groove 25.

[0044] Appendix Figure 3 In the diagram, the arrow indicates the length direction of the base 21. Along the length direction of the base 21, compared to the first mounting slot 23, the two second mounting slots 25 are located closer to the ends of the base 21. The area defined by the two second mounting slots 25 is larger than the area defined by the first mounting slot 23, and the two second mounting slots 25 can be used to mount a larger cover 1.

[0045] When testing gas concentration, using a smaller volume shroud 1 results in less dilution of the gas within the shroud 1, while using a larger volume shroud 1 results in greater dilution of the gas within the shroud 1, thus meeting the needs of different testing scenarios.

[0046] For example, when the volume of the cover 1 is small, the degree of dilution after the gas to be tested evaporates is small, making it easier to establish and maintain a stable test environment, which can be used for environmental pollutant monitoring (ozone, formaldehyde) testing.

[0047] For example, when the volume of the cover 1 is large, the gas to be tested will be diluted to a great extent after evaporation, which can create a very stable and uniform ultra-low concentration environment, which can be used to evaluate how sensitive the sensor is, that is, what the sensor's minimum test limit is.

[0048] The base 2 is made of polytetrafluoroethylene (PTFE). PTFE has good corrosion resistance and can withstand the erosion of strong acids, strong alkalis, strong oxidants, and organic solvents. PTFE has no catalytic activity; it does not participate in chemical reactions and does not catalyze reactions between gas components. PTFE has low adsorption properties and extremely low surface energy, exhibiting almost no adsorption effect on most gas molecules, making it suitable for use as a base for gas testing.

[0049] Reference Figure 2 The MEMS gas-sensitive material testing system also includes a high-temperature ceramic heating element 6, which is installed at one end of the upper surface of the base 2. When energized, the high-temperature ceramic heating element 6 heats up, causing the liquid or gas to be tested inside the cover 1 to evaporate. The heating temperature range of the high-temperature ceramic heating element 6 is room temperature to 250 degrees Celsius, for example, 20 degrees Celsius to 250 degrees Celsius.

[0050] Reference Figure 2 The MEMS gas-sensitive material testing system also includes a fan 5, which is installed on the upper surface of the base 2. The fan 5 can accelerate the airflow and carry the gas to be tested. During the flow of the gas to be tested, it comes into contact with the gas-sensitive sensor to complete the test of the gas concentration.

[0051] Working principle: In situations where multiple gas tests need to be performed consecutively.

[0052] The junction box 44 is installed in the mounting groove 28, and the magnetic connector socket end 43 extends into the mounting hole 27.

[0053] The magnetic connector plug end 42 on the pin plate 41 is placed from top to bottom into the mounting hole 27. The magnetic connector plug end 42 and the magnetic connector socket end 43 are magnetically attracted together. Specifically, the positive pole of the magnetic connector plug end 42 and the negative pole of the magnetic connector socket end 43 are magnetically attracted, and the negative pole of the magnetic connector plug end 42 and the positive pole of the magnetic connector socket end 43 are magnetically attracted. Correspondingly, the pin plate 41 is placed above the base 2.

[0054] The gas sensor inside the fixture 3 collects gas concentration information and transmits the collected information to the signal analysis device through the pin plate 41, the magnetic connector plug end 42, the magnetic connector socket end 43, and the wiring board 44 to complete a gas concentration test.

[0055] Subsequently, when further gas testing is required, firstly, detach the magnetic connector plug end 42 from the magnetic connector socket end 43, and remove the used pin plate 41, clamp 3, and built-in gas sensor. Replace with another pin plate 41, and place the magnetic connector plug end 42 carried on the new pin plate 41 into the mounting hole 27. The magnetic connector plug end 42 and the magnetic connector socket end 43 are magnetically attracted, completing the replacement of the pin plate 41, clamp 3, and gas sensor for the next gas test.

[0056] By continuously replacing the pin plate 41, the fixture 3, and the gas sensor to perform multiple gas tests, it is not necessary to clean the fixture 3 and the gas sensor each time, and the influence of the previous test on the current test can be avoided. The operation is simple and efficient.

[0057] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A MEMS gas-sensitive material testing system, comprising a base (2) and a circuit assembly (4), characterized in that the circuit assembly (4) comprises: a pin plate (41), a clamp (3) electrically connected to the upper surface of the pin plate (41), and a gas-sensitive sensor provided in the clamp (3); At least two of the magnetic connector plug ends (42) are welded to the lower surface of the pin plate (41); A junction box (44) is installed below the base (2); At least two of the magnetic connector socket ends (43) are soldered to the upper surface of the terminal block (44); In the vertical direction, the magnetic connector plug end (42) is magnetically attached to the top surface of the magnetic connector socket end (43) one by one, and the pin plate (41), the magnetic connector plug end (42), the magnetic connector socket end (43) and the terminal block (44) are combined together to form a signal path. The gas sensor in the fixture (3) collects gas concentration information, and then the gas sensor transmits the gas concentration information through the pin plate (41), the magnetic connector plug end (42), the magnetic connector socket end (43) and the terminal block (44). After completing a gas concentration test, the magnetic connector plug end (42) is separated from the magnetic connector socket end (43) to replace another pin plate (41) and the corresponding magnetic connector plug end (42) and clamp (3) for another gas concentration test.

2. The MEMS gas-sensitive material testing system according to claim 1, characterized in that... The positive pole of the magnetic connector plug end (42) and the negative pole of the magnetic connector socket end (43) are magnetically attracted together, and the negative pole of the magnetic connector plug end (42) and the positive pole of the magnetic connector socket end (43) are magnetically attracted together.

3. The MEMS gas-sensitive material testing system according to claim 1, characterized in that... At least two clamps (3) are provided on the pin plate (41) for multi-channel testing of gas.

4. The MEMS gas-sensitive material testing system according to claim 1, characterized in that... The fixture (3) includes a fixture base (32), a gas sensor is disposed in the top groove of the fixture base (32), and a fixture cover (31) is magnetically attached to the top of the fixture base (32) to cover the gas sensor; an air inlet is provided in the fixture cover (31), and gas comes into contact with the gas sensor after passing through the air inlet.

5. The MEMS gas-sensitive material testing system according to claim 1, characterized in that... The base (2) includes a base (21), the middle of which is a support part (22). Multiple mounting holes (27) are provided in the support part (22) along the vertical direction. A mounting groove (28) is provided at the bottom of the support part (22). The connector plate (44) is installed in the mounting groove (28). The pin plate (41) is supported on the support part (22). The magnetic connector plug end (42) and the magnetic connector socket end (43) pass through the mounting holes (27) and are attracted together.

6. The MEMS gas-sensitive material testing system according to claim 5, characterized in that... A first mounting groove (23) is provided on the top of the base (21) around the support part (22), and the first mounting groove (23) is used to install the cover (1).

7. The MEMS gas-sensitive material testing system according to claim 6, characterized in that... A baffle (24) is formed on the top of each end of the base (21); a stop block (26) is provided near each end of the base (21); a second mounting groove (25) is formed between the baffle (24) and the stop block (26); in the length direction of the base (21), the area defined by the two second mounting grooves (25) is larger than the area defined by the first mounting groove (23), for mounting a larger cover (1).

8. The MEMS gas-sensitive material testing system according to claim 1, characterized in that... It also includes a high-temperature ceramic heating element (6), which is installed at one end of the upper surface of the base (2). When the high-temperature ceramic heating element (6) is powered on, it heats up and causes the liquid or gas to be tested inside the cover (1) to evaporate.

9. The MEMS gas-sensitive material testing system according to claim 8, characterized in that... It also includes a fan (5), which is mounted on the upper surface of the base (2). The fan (5) blows air to cause the gas to be tested to flow with the airflow and contact the gas sensor for testing.

Images