A gas-sensitive sensor array device and its usage method

Abstract

This invention belongs to the field of gas detection instruments, specifically relating to a gas-sensitive sensor array device and its usage method. The gas-sensitive sensor array device includes a gas-sensitive sensor array base, miniature gas-sensitive elements, an internal heating rod, and an outer cover. The gas-sensitive sensor array base includes a circular tube support, a gas-sensitive element mounting ring, and a base. The miniature gas-sensitive element includes a substrate, a gas-sensitive material coating, and element pins. The internal heating rod is vertically disposed inside the circular tube support and includes an inner column, a heating outer jacket, and flexible connecting wires. The outer cover includes a top circular perforated mesh, a top annular plate, side perforated mesh, and a bottom threaded section. This invention allows for the selection of different numbers of gas-sensitive element mounting rings and gas-sensitive element slots according to different needs, as well as the selection of miniature gas-sensitive elements with different coating materials and element quantities. It enables the miniaturization of the sensor array and the integration of gas-sensitive elements with different operating temperatures, possessing high practical market application value.

Description

Technical Field

[0001] This invention belongs to the field of gas detection instruments, specifically relating to a gas-sensitive sensor array device and its usage method. Background Technology

[0002] A gas sensor array is a group of sensors, typically deployed in a geometric pattern. Compared to a single gas sensor, a sensor array adds a new dimension to observation, helps estimate more parameters, and improves estimation performance. It can be used for gas analysis of complex volatile components. However, current gas sensor arrays on the market are usually simple combinations of multiple traditional gas sensor modules. Sensors made of different gas-sensitive materials often have different optimal operating temperatures, and each sensor in the array is equipped with independent heating and protection devices. The resulting arrays are often large in size and consume a lot of energy, which is not conducive to the development of portable gas analysis instruments. The gas detection instrument R&D industry needs to develop a suitable miniaturized, integrated gas sensor array device. Summary of the Invention

[0003] The purpose of this invention is to overcome the defects described in the prior art, thereby providing a gas-sensitive sensor array device and its usage method. This invention can achieve miniaturization of the sensor array, providing technical support for further improving the integration of odor testing instruments, and has high practical market application value.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A gas-sensitive sensor array device includes a gas-sensitive sensor array base, a miniature gas-sensitive element, an internal heating rod, and an outer cover.

[0006] Preferably, the gas sensor array base includes a cylindrical support column, a gas-sensitive element mounting ring, and a base. The cylindrical support column is vertically cylindrical and mounted on the base. A perforated section is provided at the bottom of the cylindrical support column, allowing air to enter the cylindrical tube from the bottom. The gas-sensitive element mounting ring is circular and positioned outside the cylindrical support column. A gas-sensitive element slot is provided on the outside of the gas-sensitive element mounting ring, and the slot has pin insertion holes. Different numbers of gas-sensitive element mounting rings and slots can be used depending on the process. The base is disc-shaped and positioned at the bottom of the gas sensor array base. The base has threads on its outside for mounting an outer cover. A circuit tube connects the base to the outer side of the gas-sensitive element mounting ring. A base pin is located at the bottom of the base, where all electronic circuitry of the device converges. The device is mounted on a testing instrument and connected to the testing circuitry via the base pin.

[0007] Preferably, the miniature gas-sensitive element includes a substrate, a gas-sensitive material coating, and element leads. The top of the substrate is arc-shaped, with its curvature equal to that of the circular tube support. When the miniature gas-sensitive element is inserted into the gas-sensitive element slot, the top of the substrate contacts and fully fits the circular tube support. The gas-sensitive material coating is applied to the substrate, positioned on the side closest to the circular tube support after installation. The element leads are located at the bottom of the substrate and are connected to the gas-sensitive material coating through internal electronic circuitry. When the miniature gas-sensitive element is inserted into the gas-sensitive element slot, the element leads can be inserted into the lead sockets and connected to the device's electronic circuitry. The miniature gas-sensitive element itself does not have a heating device or a protection device, has a simple structure, and is very small in size. Different gas-sensitive coating materials can be used to install miniature gas-sensitive elements, and different installation positions can be selected according to requirements.

[0008] Preferably, the internal heating rod is vertically arranged inside the cylindrical support column, including an inner column, a heating jacket, and flexible connecting wires. The inner column is vertically mounted on the base, and its top has a long threaded section. The bottom of the heating jacket is a hollow cylinder with a long internal threaded section, and it is threaded onto the inner column. A heating resistor is located inside the heating jacket and is connected to the inner column and the device's electronic circuitry via a flexible connecting wire. A screwdriver slot is provided at the top of the heating jacket; a screwdriver is inserted into the cylindrical support column to rotate the heating jacket and adjust its vertical position within the column.

[0009] Preferably, the outer cover includes a top circular perforated mesh, a top annular plate, side perforated mesh, and a bottom threaded section. The bottom threaded section can be threadedly connected to the base, allowing the outer cover to cover the gas sensor array base. Simultaneously, the top circular perforated mesh has the same diameter as the circular tube support, ensuring a perfect fit. Air inside the circular tube support enters the outside through the top circular perforated mesh. The top annular plate is positioned above the gas-sensitive element mounting ring, normally preventing dust from splashing onto the gas-sensitive element and, during use, preventing air from re-entering the gas sensor array after cooling.

[0010] A method of using a gas-sensitive sensor array device includes the following steps:

[0011] 1. Set different numbers of gas-sensitive element mounting rings and gas-sensitive element slots according to different needs. Multiple gas-sensitive element mounting rings are arranged from top to bottom and set on the circular tube support. Each gas-sensitive element mounting ring is equipped with several gas-sensitive element slots.

[0012] 2. Select micro gas-sensitive elements with different coating materials and their quantities according to requirements. Classify them according to the optimal temperature of the coating material. Insert the relatively high temperature gas-sensitive elements into the gas-sensitive element slots on the gas-sensitive element mounting rings at the lower and relatively low temperature levels into the gas-sensitive element slots on the gas-sensitive element mounting rings at the upper.

[0013] 3. Use a screwdriver to insert into the screwdriver slot at the top of the heating jacket inside the round tube support and rotate it to adjust the vertical position of the heating jacket inside the round tube support, so that the heating resistor is closer to the gas-sensitive element mounting ring below it, and the temperature meets the test requirements.

[0014] 4. After installing the outer cover on the gas sensor array base, install the gas sensor array device on the corresponding gas detection instrument for testing.

[0015] 5. After the instrument is powered on, the heating resistor inside the heating jacket heats up, gradually reaching the required temperature. Simultaneously, hot air inside the circular tube support rises, passes through the top circular perforated mesh, and is discharged to the outside of the device. A negative pressure is generated at the bottom of the circular tube support, drawing air through the perforated section into the bottom of the tube support. The gas to be measured outside enters the device through the side perforated mesh and comes into contact with the gas-sensitive element. The change in electrical signal generated by the miniature gas-sensitive element is transmitted to the detection instrument to complete the detection.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. This invention integrates a traditional gas sensor array, with multiple gas-sensitive elements sharing a single heating device and protective cover, thus achieving miniaturization of the gas sensor array.

[0018] 2. This invention adopts a modular design, which can be adjusted to suit different task requirements and has multiple uses. Different numbers of gas-sensitive element mounting rings and gas-sensitive element slots are set according to different needs, and different coating materials of micro gas-sensitive elements and the number of elements are selected according to the needs.

[0019] 3. This invention can integrate gas-sensitive elements with different operating temperatures into the same array, and achieve the simultaneous use of gas-sensitive elements with different operating temperatures by inserting them into slots at different positions and adjusting the relative positions of heating resistors.

[0020] 4. The high-temperature operating environment of traditional gas sensors makes it difficult for the volatile components of the gas to be measured to contact the gas-sensitive element due to poor gas flow. The unique design of this invention allows air to circulate, making it easier for the gas to be measured to contact the gas-sensitive element.

[0021] 5. The unique outer casing design of this invention can reduce dust splashing onto the gas-sensitive element when it is not in use. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a gas-sensitive sensor array device according to the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of the gas-sensitive sensor array base in Embodiment 1 of the present invention;

[0025] Figure 3 This is a schematic diagram of the structure of the miniature gas-sensitive element in Embodiment 1 of the present invention;

[0026] Figure 4 This is a schematic diagram of the internal heating rod in Embodiment 1 of the present invention;

[0027] Figure 5 This is a schematic diagram of the outer cover in Embodiment 1 of the present invention;

[0028] Figure 6 This is a schematic diagram of gas flow in the device according to Embodiment 1 of the present invention;

[0029] Explanation of reference numerals in the attached drawings: 1. Gas sensor array base; 2. Miniature gas-sensitive element; 3. Internal heating rod; 4. Outer cover; 5. Circular tube support; 6. Gas-sensitive element mounting ring; 7. Base; 8. Hollow section; 9. Gas-sensitive element slot; 10. Base pin; 11. Circuit tube; 12. Pin socket; 13. Substrate; 14. Gas-sensitive material coating; 15. Element pin; 16. Inner column; 17. Heating jacket; 18. Flexible connecting wire; 19. Screwdriver slot; 20. Top circular hollow mesh; 21. Top annular plate; 22. Side hollow mesh; 23. Bottom threaded section. Implementation

[0030] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0031] A gas-sensitive sensor array device includes a gas-sensitive sensor array base 1, a miniature gas-sensitive element 2, an internal heating rod 3, and an outer cover 4.

[0032] Preferably, the gas sensor array base 1 includes a cylindrical support column 5, a gas-sensitive element mounting ring 6, and a base 7. The cylindrical support column 5 is vertically cylindrical and mounted on the base 7. The bottom of the cylindrical support column 5 has a hollow section 8, allowing air to enter the cylindrical tube from the bottom. The gas-sensitive element mounting ring 6 is circularly positioned outside the cylindrical support column. A gas-sensitive element slot 9 is provided on the outside of the gas-sensitive element mounting ring 6, and the gas-sensitive element slot 9 has pin insertion holes 12. Different numbers of gas-sensitive element mounting rings 6 and gas-sensitive element slots 9 can be used depending on the process. The base 7 is disc-shaped and positioned at the bottom of the gas sensor array base 1. The outside of the base 7 has threads for mounting an outer cover 4. A circuit tube 11 connects the base 7 to the outside of the gas-sensitive element mounting ring 6. A base pin 10 is provided at the bottom of the base 7, where all electronic circuitry of the device converges. The device is mounted on a testing instrument and connected to the testing circuitry via the base pin 10.

[0033] Preferably, the miniature gas-sensitive element 2 includes a substrate 13, a gas-sensitive material coating 14, and element pins 15. The top of the substrate 13 is arc-shaped, with an arc equal to that of the circular tube support 5. When the miniature gas-sensitive element 2 is inserted into the gas-sensitive element slot 9, the top of the substrate 13 contacts and fully fits the circular tube support 5. The gas-sensitive material coating 14 is applied to the substrate 13, positioned on the side closest to the circular tube support 5 after installation. The element pins 15 are located at the bottom of the substrate 13 and are connected to the gas-sensitive material coating 14 through the electronic circuitry inside the substrate 13. When the miniature gas-sensitive element 2 is inserted into the gas-sensitive element slot 9, the element pins 15 can be inserted into the pin sockets 12 and connected to the device's electronic circuitry. The miniature gas-sensitive element 2 itself does not have a heating device or a protection device, has a simple structure, and is small in size. Different gas-sensitive coating materials can be used to install miniature gas-sensitive elements 2 as needed, and different installation positions can be selected.

[0034] Preferably, the internal heating rod 3 is vertically arranged inside the circular tube support 5, including an inner column 16, a heating jacket 17, and a flexible connecting wire 18. The inner column 16 is vertically mounted on the base 7, and the top of the inner column 16 has a long threaded section. The bottom of the heating jacket 17 is a hollow cylindrical shape with a long internal threaded section, and it is threaded onto the inner column 16. The heating jacket 17 contains a heating resistor, which is connected to the inner column 16 via the flexible connecting wire 18 and is connected to the electronic circuitry of the device. The top of the heating jacket 17 has a screwdriver slot 19. By inserting a screwdriver into the circular tube support and rotating the heating jacket 17, the vertical position of the heating jacket inside the circular tube support can be adjusted.

[0035] Preferably, the outer cover 4 includes a top circular perforated mesh 20, a top annular plate 21, a side perforated mesh 22, and a bottom threaded section 23. The bottom threaded section 23 can be threadedly connected to the base 7, so that the outer cover 4 covers the gas sensor array base 1. At the same time, the top circular perforated mesh 20 and the circular tube support 5 have the same diameter and fit perfectly. The air inside the circular tube support 5 enters the outside through the top circular perforated mesh 20. The top annular plate 21 is located above the gas-sensitive element mounting ring 6. Normally, it prevents dust from splashing onto the gas-sensitive element. During use, it prevents air from re-entering the gas sensor array device after cooling.

[0036] A method of using a gas-sensitive sensor array device includes the following steps:

[0037] 1. Set different numbers of gas-sensitive element mounting rings 6 and gas-sensitive element slots 9 according to different needs. Taking two gas-sensitive element mounting rings 6 and twelve gas-sensitive element slots 9 as an example, the two gas-sensitive element mounting rings 6 are set on the circular tube support 5, and each gas-sensitive element mounting ring 6 is equipped with six gas-sensitive element slots 9.

[0038] 2. Select micro gas-sensitive elements 2 with different coating materials according to the requirements. Taking six relatively high temperature gas-sensitive elements and six relatively low temperature gas-sensitive elements as an example, the six relatively high temperature gas-sensitive elements are inserted into the gas-sensitive element slots 9 on the lower gas-sensitive element mounting ring 6, and the other six relatively low temperature gas-sensitive elements are inserted into the gas-sensitive element slots 9 on the upper gas-sensitive element mounting ring 6.

[0039] 3. Use a screwdriver to insert into the screwdriver slot 19 at the top of the heating jacket 17 inside the round tube support 5 and rotate it to adjust the upper and lower position of the heating jacket inside the round tube support, so that the heating resistor is closer to the lower gas-sensitive element mounting ring 6 and the temperature meets the test requirements.

[0040] 4. After installing the outer cover 4 on the gas sensor array base 1, install the gas sensor array device on the corresponding gas detection instrument for testing.

[0041] 5. After the instrument is powered on, the heating resistor inside the heating jacket 17 heats up and gradually reaches the required temperature. Simultaneously, hot air rises inside the circular tube support 5, passes through the top circular perforated mesh 20, and is discharged to the outside of the device. A negative pressure is generated at the bottom of the circular tube support 5, drawing air through the perforated section 8 into the bottom of the circular tube support 5. The gas to be measured enters the device through the side perforated mesh 22 and comes into contact with the gas-sensitive element. The change in electrical signal generated by the miniature gas-sensitive element 2 is transmitted to the detection instrument to complete the detection.

[0042] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A gas-sensitive sensor array device, characterized in that... It includes a gas sensor array base, a miniature gas-sensitive element, an internal heating rod, and an outer cover; the internal heating rod provides a suitable operating temperature for the gas sensor array, and the outer cover can completely cover the gas sensor array base, serving both protection and ventilation functions. The gas sensor array base includes a cylindrical support column, a gas-sensitive element mounting ring, and a base. The cylindrical support column is vertically cylindrical and mounted on the base. A hollow section is provided at the bottom of the cylindrical support column to allow air to enter the cylindrical tube from the bottom. The gas-sensitive element mounting ring is circular and located outside the cylindrical support column. A gas-sensitive element slot is provided on the outside of the gas-sensitive element mounting ring, and the slot has pin insertion holes. Different numbers of gas-sensitive element mounting rings and slots can be configured according to different requirements. The base is disc-shaped and located at the bottom of the gas sensor array base. The base has threads on its outside for mounting an outer cover. A circuit tube connects the base to the outer side of the gas-sensitive element mounting ring. A base pin is located at the bottom of the base, where all electronic circuitry of the device converges. The device is mounted on a testing instrument and connected to the testing circuitry via the base pin. The outer cover includes a top circular perforated mesh, a top annular plate, side perforated mesh, and a bottom threaded section. The bottom threaded section can be threadedly connected to the base, so that the outer cover covers the gas sensor array base. At the same time, the top circular perforated mesh is equal in diameter to the circular tube support, and fits perfectly. Air inside the circular tube support enters the outside through the top circular perforated mesh. The top annular plate is located above the gas-sensitive element mounting ring. Normally, it prevents dust from splashing onto the gas-sensitive element. During use, it prevents air from re-entering the gas sensor array device after cooling.

2. The gas-sensitive sensor array device according to claim 1, characterized in that... The miniature gas-sensitive element includes a substrate, a gas-sensitive material coating, and element pins. The top of the substrate is arc-shaped, with an arc equal to that of the circular tube support. When the miniature gas-sensitive element is inserted into the gas-sensitive element slot, the top of the substrate contacts and fully fits the circular tube support. The gas-sensitive material coating is applied to the substrate, positioned on the side closest to the circular tube support after installation. The element pins are located at the bottom of the substrate and are connected to the gas-sensitive material coating through internal electronic circuitry. When the miniature gas-sensitive element is inserted into the gas-sensitive element slot, the element pins can be inserted into the pin sockets and connected to the device's electronic circuitry. The miniature gas-sensitive element itself does not have a heating device or a protection device, has a simple structure, and is very small in size. Different gas-sensitive coating materials can be installed on miniature gas-sensitive elements as needed, and different installation positions can be selected.

3. The gas-sensitive sensor array device according to claim 1, characterized in that... The internal heating rod is vertically installed inside the cylindrical support column and includes an inner column, a heating jacket, and flexible connecting wires. The inner column is vertically installed on the base, and its top has a long threaded section. The bottom of the heating jacket is a hollow cylinder with a long internal threaded section. It is threaded onto the inner column. The heating jacket contains a heating resistor, which is connected to the inner column via the flexible connecting wires and is also connected to the device's electronic circuitry. The top of the heating jacket has a screwdriver slot. By inserting a screwdriver into the cylindrical support column and rotating the heating jacket, the vertical position of the heating jacket inside the cylindrical support column can be adjusted.

4. A method of using a gas-sensitive sensor array device according to any one of claims 1-3, characterized in that... Includes the following steps: (1) Set different numbers of gas-sensitive element mounting rings and gas-sensitive element slots according to different needs. Multiple gas-sensitive element mounting rings are arranged from top to bottom and set on the circular tube support. Each gas-sensitive element mounting ring is equipped with several gas-sensitive element slots. (2) Select micro gas-sensitive elements with different coating materials and the number of elements according to the requirements. Classify them according to the optimal temperature of the coating material. Insert the gas-sensitive elements with relatively high temperature into the gas-sensitive element slot on the gas-sensitive element mounting ring with relatively low temperature, and insert the gas-sensitive elements with relatively low temperature into the gas-sensitive element slot on the gas-sensitive element mounting ring with relatively high temperature. (3) Insert the screwdriver into the screwdriver slot at the top of the heating jacket inside the round tube support and rotate it to adjust the upper and lower position of the heating jacket inside the round tube support so that the heating resistor is closer to the gas-sensitive element mounting ring below and the temperature meets the test requirements. (4) After installing the outer cover on the gas sensor array base, install the gas sensor array device on the corresponding gas detection instrument for testing; (5) After the instrument is powered on, the heating resistor inside the heating jacket heats up and gradually reaches the required temperature. At the same time, the hot air inside the round tube support rises, passes through the top circular perforated mesh and is discharged to the outside of the device. A negative pressure is generated at the bottom of the round tube support, and the air enters the bottom of the round tube support through the perforated section. The gas to be tested outside enters the device through the side perforated mesh and comes into contact with the gas-sensitive element. The change in electrical signal generated by the micro gas-sensitive element is transmitted to the detection instrument to complete the detection.

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