Dispersed oxygen whole-course range measurement sensor module
By designing a diffuse oxygen sensor module combining circuit board and measurement module, and using zirconium oxide for oxygen detection, the problem of inaccurate and high cost of oxygen sensors in the diffuse environment in the prior art is solved, and the oxygen detection effect with fast response and long life is achieved.
Patent Information
- Application Number
- CN202421640368.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-11
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-07-11
AI Technical Summary
Existing oxygen sensors have problems such as increasing noise, unstable airflow, large deviation in detection value, large temperature and humidity influence, and high cost in the diffuse environment, making it difficult to achieve accurate and stable oxygen detection.
A full-range measurement sensor module for diffuse oxygen is designed. It uses a combination of circuit board and measurement module to use zirconia as a detection medium to detect oxygen through current signals, and quickly disassemble and impurity filtration are achieved through the intake mechanism and fixing mechanism.
Accurate detection of oxygen in the space is achieved, fast response time and low dependence on temperature, improving service life, and the stability of the detection temperature is protected and impurities in the air are prevented from entering.
Smart Images
Figure CN223037862U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sensors, in particular to a sensor module for measuring the whole range of diffused oxygen. Background Technique
[0002] The air in the plateau area is thin. People living on the plateau are prone to altitude sickness, with a relatively low oxygen partial pressure, that is, a lack of oxygen, which may cause a series of adverse effects. For most people, work and life are not static in a fixed area, and they cannot supplement oxygen through nasal oxygen supply pipelines fixed in the room or near the workbench. Therefore, the indoor diffused oxygen supply method is generally adopted to increase the oxygen concentration in the room.
[0003] During the process of diffused oxygen supply, it is necessary to detect the oxygen content in the environment. In the prior art, ultrasonic and electrochemical oxygen sensors are mainly used. The ultrasonic sensor mainly measures the oxygen concentration passing through the pipeline. When used in a diffused environment, a small fan needs to be installed on one side of the pipeline of the ultrasonic sensor to blow air into the pipeline. The ultrasonic oxygen sensor is fixed by screws. The electrochemical oxygen sensor is inserted by socket, and then the weak current signal is converted into a voltage signal that can be collected by the single-chip microcomputer through signal processing, and calibration and judgment need to be done on the display interface;
[0004] However, both of the above two traditional solutions have certain disadvantages: Ultrasonic oxygen sensor: 1. It increases environmental noise. 2. The air flow is unstable, and the detected value has a large deviation. 3. The gas cost in some gas environments will cause cross-infection to the ultrasonic oxygen sensor, making the test value inaccurate.
[0005] Electrochemical oxygen sensor: 1. It is particularly affected by temperature and humidity, and has a serious temperature drift. 2. As the cost of electrochemistry decreases, the detected value will also deviate, and it needs to be calibrated regularly in a standard environment. 3. When the chemical cost is reduced to a certain extent, it needs to be replaced. The cost of the electrochemical oxygen sensor is relatively high. Therefore, we propose a sensor module for measuring the whole range of diffused oxygen. Content of the Utility Model
[0006] The purpose of the utility model is to provide a sensor module for measuring the whole range of diffused oxygen to solve the problems raised in the background technique.
[0007] To achieve the above object, the present utility model provides the following technical solutions: A diffuse oxygen full-range measurement sensor module, including a circuit board, a measurement module for collecting oxygen current signals is electrically connected to the top of the circuit board, and an air intake mechanism that is conveniently detachable is installed above the measurement module on the top of the circuit board through a fixing mechanism. Four groups of connection pins are electrically connected to the circuit board, and a mounting plate is fixedly connected to the bottom of the circuit board through multiple fixing columns.
[0008] Further, the air intake mechanism includes an air intake cover, a top cover, and a connecting cylinder. The top of the connecting cylinder is fixedly connected to the air intake cover, and the top of the air intake cover is hermetically connected to the top cover.
[0009] Further, the fixing mechanism includes mounting posts, gaskets, positioning grooves, rotating shafts, and sealing plates. Four groups of oval positioning grooves are penetrated and opened on the circuit board. The bottom of the connecting cylinder is fixedly connected with mounting posts that fit the inner walls of the positioning grooves at the corresponding positions. Gaskets that fit the circuit board are fixedly connected to the outer surfaces of the mounting posts. The bottom of the mounting post is rotatably connected with an oval sealing plate that fits the bottom of the circuit board.
[0010] Further, the measurement module includes a zirconia block and a heating block. Two sets of series-connected heating blocks are arranged inside the zirconia block. The two heating blocks are respectively electrically connected to two groups of connection pins through a first connecting wire and a second connecting wire. The inside of the zirconia block is electrically connected to the third group of connection pins through an inner electrode lead wire. One side of the zirconia block is electrically connected to the fourth group of connection pins through an outer electrode lead wire. The outer electrode lead wire provides an outer electrode for the zirconia block.
[0011] Further, the manufacturing materials of the air intake cover, the top cover, and the connecting cylinder are all stainless steel materials, and the air intake cover is arranged in a double-layer wire mesh structure.
[0012] Further, the manufacturing material of the mounting plate is PVC material, and multiple locking holes are penetrated and opened on the mounting plate.
[0013] Compared with the prior art, the utility model has the following beneficial effects: The utility model can achieve electrical connection and signal transmission by setting a circuit board, and the set measuring mechanism can use zirconia as a detection medium for detection, and can detect by converting oxygen into an electric current signal form, so as to accurately detect the oxygen in the space. Such a detection method has a relatively fast response time, less dependence on temperature, and can improve the service life to a certain extent. The set air intake mechanism can protect the stability of the internal temperature of the measuring module, and can also quickly detect the air intake mechanism in the diffused air machine. Moreover, the setting of the air intake mechanism can also block impurities in the air, and the air intake mechanism connected by the fixing mechanism is convenient for disassembly, facilitating the rapid cleaning of external blocked dust and impurities. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 is a schematic diagram of the three-dimensional structure of the first embodiment of the utility model;
[0015] Figure 2 is a schematic diagram of the three-dimensional structure of the utility model after removing the mounting plate and the sealing plate;
[0016] Figure 3 is an enlarged schematic diagram of the structure A of the utility model;
[0017] Figure 4 is a schematic diagram of the three-dimensional structure of the second embodiment of the utility model;
[0018] Figure 5 is a schematic diagram of the system principle of the measuring module of the utility model.
[0019] In the figure: 1 circuit board, 2 measuring module, 3 air intake mechanism, 4 fixing mechanism, 5 connection pin, 6 fixing column, 7 mounting plate, 8 locking hole, 9 air intake hood, 10 top cover, 11 connecting cylinder, 12 mounting column, 13 gasket, 14 positioning groove, 15 rotating shaft, 16 sealing plate, 17 zirconia block, 18 heating block, 19 first connecting wire, 20 second connecting wire, 21 inner electrode lead wire, 22 outer electrode lead wire. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0021] Please refer to Figures 1-5, the present utility model provides a technical solution: a diffuse oxygen full-range measurement sensor module, including a circuit board 1, a measurement module 2 for collecting oxygen current signals is electrically connected to the top of the circuit board 1, and an air inlet mechanism 3 that is conveniently detachable is installed above the measurement module 2 on the top of the circuit board 1 through a fixing mechanism 4. Four groups of connection pins 5 are electrically connected to the circuit board 1, and a mounting plate 7 is fixedly connected to the bottom of the circuit board 1 through a plurality of fixing columns 6. The manufacturing material of the mounting plate 7 is PVC material, and a plurality of locking holes 8 are penetrated through the mounting plate 7.
[0022] Among them, the circuit board 1 can be set to achieve electrical connection and signal transmission, and the set measurement mechanism 2 can use zirconia as a detection medium for detection, and can detect by converting oxygen into an electric current signal form, so that the oxygen in the space can be accurately detected. Such a detection method has a relatively fast response time, less dependence on temperature, and can improve the service life to a certain extent. The set air inlet mechanism 3 can protect the stability of the internal temperature of the measurement module 2, and can also quickly detect the diffuse air. The setting of the air inlet mechanism 3 can also block impurities in the air, and the air inlet mechanism 3 connected by the fixing mechanism 4 is convenient for disassembly, facilitating the rapid cleaning of external blocked dust and impurities.
[0023] Please refer to Figure 1 , the air inlet mechanism 3 includes an air inlet cover 9, a top cover 10 and a connecting cylinder 11. The top of the connecting cylinder 11 is fixedly connected with the air inlet cover 9, the top of the air inlet cover 9 is hermetically connected with the top cover 10, and the manufacturing materials of the air inlet cover 9, the top cover 10 and the connecting cylinder 11 are all stainless steel materials. The air inlet cover 9 is set as a double-layer wire mesh structure.
[0024] Among them, the set top cover 10 can ensure the seal of the top of the air inlet cover 9. Subsequently, air enters above the measurement mechanism 2 through the air inlet cover 9 made of a double-layer wire mesh structure for oxygen content detection. Such a setting can also keep the temperature of the detection position at the top of the measurement mechanism 2 warm.
[0025] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , the fixing mechanism 4 includes a mounting post 12, a gasket 13, a positioning groove 14, a rotating shaft 15 and a sealing plate 16. Four elliptical positioning grooves 14 are penetrated through the circuit board 1. The bottom of the connecting cylinder 11 is fixedly connected with a mounting post 12 that fits the inner wall of the positioning groove 14 at a position corresponding to the positioning groove 14. A gasket 13 that fits the circuit board 1 is fixedly connected to the outer surface of the mounting post 12. The bottom of the mounting post 12 is rotatably connected with an elliptical sealing plate 16 that fits the bottom of the circuit board 1 through a rotating shaft 15.
[0026] Among them, when the intake mechanism 2 is installed, the elliptical mounting posts 12 and the sealing plate 16 are passed through the inside of the elliptical positioning groove 14, and the sealing plate 16 is passed through to the bottom of the circuit board 1. Then, the sealing plate 16 is rotated to rotate along the rotating shaft 15. Subsequently, the sealing plate 16 can be rotated, and the sealing plate 16 is made to fit against the bottom of the circuit board 1, thereby completing the fixation of the intake mechanism 3. When the intake mechanism is disassembled, by rotating the sealing plate 16 to make the sealing plate 16 correspond to the positioning groove 14, the rapid removal of the intake mechanism 3 can be completed.
[0027] Please refer to Figure 1 、 Figure 4 and Figure 5 The measurement module 2 includes a zirconia block 17 and a heating block 18. Two sets of series-connected heating blocks 18 are arranged inside the zirconia block 17. The two sets of heating blocks 18 are respectively electrically connected to two sets of connection pins 5 through a first connection wire 19 and a second connection wire 20. The inside of the zirconia block 17 is electrically connected to a third set of connection pins 5 through an internal electrode lead wire 21. One side of the zirconia block 17 is electrically connected to a fourth set of connection pins 5 through an external electrode lead wire 22. The external electrode lead wire 22 provides an external electrode for the zirconia block 17.
[0028] Among them, the first connection wire 19 and the second connection wire 20 are connected to two sets of connection pins 5, thereby providing a certain voltage for the heating block 18, so that the zirconia block 17 can be quickly heated. At this time, the zirconia block 17 starts to work. When the zirconia block 17 is heated to above 600 °C, the oxygen molecules on the surface of the zirconia block 17 will be oxygen-dissociated to generate ions, and a current is formed under the drive of the Vs potential, also known as an ion current. The external oxygen ions form a current signal proportional to the oxygen content under the drive of the Vs potential. The higher the oxygen concentration, the larger the current signal; the lower the oxygen concentration, the smaller the current signal. In this way, the rapid detection of the oxygen content of the diffused air in the space can be completed.
[0029] In use, first of all, by setting the circuit board 1, electrical connection and signal transmission can be achieved. The set measuring mechanism 2 can use zirconia as the detection medium for detection. It can be detected by converting oxygen into an electric current signal form, so that the oxygen in the space can be accurately detected. Such a detection method has a relatively fast response time, less dependence on temperature, and can improve the service life to a certain extent. The set air intake mechanism 3 can protect the stability of the internal temperature of the measurement module 2, and can also quickly detect the diffused air. The setting of the air intake mechanism 3 can also block impurities in the air. The air intake mechanism 3 connected by the fixing mechanism 4 is convenient for disassembly, and is convenient for quickly cleaning the dust and impurities blocked outside. The set top cover 10 can ensure the seal at the top of the air intake hood 9. Subsequently, air enters above the measuring mechanism 2 through the air intake hood 9 made of a double-layer wire mesh structure for oxygen content detection. Such a setting can also keep the temperature of the detection position at the top of the measuring mechanism 2. When installing the air intake mechanism 2, the oval mounting post 12 and the sealing plate 16 are passed through the inside of the oval positioning groove 14, and the sealing plate 16 is passed through to the bottom of the circuit board 1. Subsequently, the sealing plate 16 is rotated to rotate along the rotating shaft 15. Then, the sealing plate 16 can be rotated to make the sealing plate 16 fit with the bottom of the circuit board 1, so that the fixing of the air intake mechanism 3 can be completed. When disassembling the air intake mechanism, by rotating the sealing plate 16 to make the sealing plate 16 correspond to the positioning groove 14, the rapid removal of the air intake mechanism 3 can be completed. The first connecting wire 19 and the second connecting wire 20 are connected to two groups of connecting pins 5, so as to provide a certain voltage for the heating block 18, so that the zirconia block 17 can be quickly heated. At this time, the zirconia block 17 starts to work. When the zirconia block 17 is heated to above 600 °C, the oxygen molecules on the surface of the zirconia block 17 will be oxygen-dissociated to generate ions, and an electric current is formed under the drive of the Vs potential, also known as ion current. The external oxygen ions form an electric current signal proportional to the oxygen content under the drive of the Vs potential. The higher the oxygen concentration, the larger the electric current signal; the lower the oxygen concentration, the smaller the electric current signal. In this way, the rapid detection of the oxygen content of the diffused air in the space can be completed.
[0030] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A diffuse oxygen full range measurement sensor module, comprising a circuit board (1), characterized in that: The top of the circuit board (1) is electrically connected to a measurement module (2) for collecting oxygen current signals; an air intake mechanism (3) that is easily disassembled is installed on the top of the circuit board (1) and above the measurement module (2) via a fixing mechanism (4); four groups of connection pins (5) are electrically connected to the circuit board (1); and a mounting plate (7) is fixedly connected to the bottom of the circuit board (1) via a plurality of fixing columns (6).
2. A diffuse oxygen full range measurement sensor module according to claim 1, characterized in that: The air intake mechanism (3) comprises an air intake hood (9), a top cover (10) and a connecting tube (11); the top of the connecting tube (11) is fixedly connected to the air intake hood (9), and the top of the air intake hood (9) is sealingly connected to the top cover (10).
3. A diffuse oxygen full range measurement sensor module according to claim 2, characterized in that: The fixing mechanism (4) comprises a mounting column (12), a gasket (13), a positioning groove (14), a rotating shaft (15) and a sealing plate (16); four groups of elliptical positioning grooves (14) are formed through the circuit board (1); the bottom of the connecting tube (11) and the position corresponding to the positioning groove (14) are fixedly connected with a mounting column (12) which is in contact with the inner wall of the positioning groove (14); the outer surface of the mounting column (12) is fixedly connected with a gasket (13) which is in contact with the circuit board (1); the bottom of the mounting column (12) is rotatably connected with an elliptical sealing plate (16) which is in contact with the bottom of the circuit board (1) via the rotating shaft (15).
4. A diffuse oxygen full range measurement sensor module according to claim 3, characterized in that: The measuring module (2) comprises a zirconia block (17) and a heating block (18); two groups of heating blocks (18) connected in series are arranged inside the zirconia block (17); the two groups of heating blocks (18) are electrically connected to two groups of connecting pins (5) via a first connecting wire (19) and a second connecting wire (20), respectively; the inside of the zirconia block (17) is electrically connected to a third group of connecting pins (5) via an internal electrode lead wire (21); one side of the zirconia block (17) is electrically connected to a fourth group of connecting pins (5) via an external electrode lead wire (22); the external electrode lead wire (22) provides an external electrode for the zirconia block (17).
5. A diffuse oxygen full range measurement sensor module according to claim 4, characterized in that: The air intake hood (9), the top cover (10) and the connecting tube (11) are all made of stainless steel, and the air intake hood (9) is configured as a double-layer wire mesh structure.
6. A diffuse oxygen full range measurement sensor module according to claim 5, characterized in that: The mounting plate (7) is made of PVC material, and a plurality of locking holes (8) are formed through the mounting plate (7).