High-impedance nitrogen oxide gas sensor

Abstract

The utility model relates to the technical field of electronic components, disclose high nature impedance formula nitrogen oxide gas sensor, including the casing, fixedly arranged with motor on the casing, the outer wall of motor is fixedly connected with the support support, the output of motor is fixedly arranged with transmission shaft, the outer wall of transmission shaft is fixedly connected with connecting rod, the outer wall of connecting rod is fixedly connected with mobile column, the outer wall of mobile column is fixedly connected with the foldable shield plate, the outer wall of foldable shield plate is fixedly connected with the moving block, the outer wall of moving block is connected with the inner ring of sliding, the outer wall of moving block is fixedly connected with the connecting support. In the utility model, start motor drive transmission shaft rotation, drive connecting rod, mobile column, foldable shield plate remove to realize multidirectional shielding sensing, and moving block sticks to the positioning block and completes all -round shielding, to reach realizes all -round shielding and reset, promotes sensing accuracy and use reliable effect.

Description

Technical Field

[0001] This utility model relates to the field of electronic components technology, and in particular to a high impedance type nitrogen oxide gas sensor. Background Technology

[0002] Nitrogen oxide (NOx) gas sensors are gas sensing devices that can specifically identify the concentration of NOx in the environment and convert it into a detectable electrical signal. They are widely used in scenarios such as vehicle exhaust monitoring, industrial waste gas emission control, indoor air quality testing, and environmental monitoring stations. NOx gas sensors must adopt a high impedance design. On the one hand, NOx often exists in the atmosphere and exhaust gases in a low concentration form. High impedance can enhance the sensor's ability to capture and amplify weak electrical signals and improve resolution. On the other hand, the sensor's working environment often contains interfering components such as carbon dioxide, sulfur dioxide, and water vapor. A high impedance structure can suppress the transmission of interference signals through impedance matching and reduce the impact of environmental noise on the sensing signal.

[0003] Common nitrogen oxide gas sensors often employ a fixed sensing structure and a simple shielding shell. The shielding design is usually a one-piece metal shell, with a gas flow port only reserved at the front end of the sensor. During use, it is difficult to adjust the shielding range according to the detection scenario. Some simple sensors even lack a dedicated shielding structure and rely solely on the grounding design of the circuit board to resist interference, which leads to reduced sensing accuracy. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a high impedance nitrogen oxide gas sensor, which aims to improve the problem of reduced sensing accuracy caused by relying on the grounding design of the circuit board itself for anti-interference.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-resistivity nitrogen oxide gas sensor, comprising a housing, a motor fixedly mounted on the housing, a support bracket fixedly connected to the outer wall of the motor, a drive shaft fixedly mounted at the output end of the motor, a connecting rod fixedly connected to the outer wall of the drive shaft, a movable column fixedly connected to the outer wall of the connecting rod, a foldable shielding plate fixedly connected to the outer wall of the movable column, a movable block fixedly connected to the outer wall of the foldable shielding plate, an inner ring slidably connected to the outer wall of the movable block, an outer ring slidably connected to the outer wall of the movable block, a connecting bracket fixedly connected to the outer wall of the movable block, a positioning block fixedly connected to the outer wall of the connecting bracket, a limiting block fixedly connected to the inner wall of the outer ring, a top plate rotatably connected to the outer wall of the drive shaft, and a high-resistivity component disposed on the outer wall of the top plate.

[0006] Preferably, the high impedance component includes a sensor body, the outer wall of which is fixedly mounted on the outer wall of the top plate, and a pipe is fixedly connected to the outer wall of the sensor body, the outer wall of which is fixedly connected to the inner wall of the housing.

[0007] Preferably, the outer wall of the drive shaft is rotatably connected to the inner wall of the support bracket, and the outer wall of the movable column is slidably connected to the inner wall of the housing.

[0008] Preferably, the outer wall of the foldable shielding plate is slidably connected to the inner wall of the housing, and the inner wall of the inner ring is fixedly connected to the outer wall of the support bracket.

[0009] Preferably, the outer wall of the outer ring is fixedly connected to the inner wall of the housing, and the outer wall of the connecting bracket is attached to the outer wall of the inner ring.

[0010] Preferably, the outer wall of the positioning block is fixedly connected to the outer wall of the inner ring, the outer wall of the positioning block is fixedly connected to the inner wall of the outer ring, and the outer wall of the limiting block is fixedly connected to the outer wall of the inner ring.

[0011] Preferably, a flip plate is fixedly connected to the outer wall of the housing, a soft pad is fixedly connected to the outer wall of the flip plate, a fixed seat is attached to the outer wall of the soft pad, a rotating bracket is rotatably connected to the outer wall of the fixed seat, a self-locking hydraulic press is fixedly mounted on the rotating bracket, an adjusting plate is fixedly mounted at the output end of the self-locking hydraulic press, and a flip plate is rotatably connected to the outer wall of the flip plate.

[0012] Preferably, the outer wall of the adjusting plate is fixedly connected to the outer wall of the flipping plate, and the outer wall of the flipping bracket is fixedly connected to the outer wall of the fixed base.

[0013] This utility model has the following beneficial effects: In this invention, a starter motor drives the transmission shaft to rotate, which in turn moves the connecting rod, the moving column, and the foldable shielding plate to achieve multi-directional shielding sensing. The moving block fits into the positioning block to complete all-round shielding. After being pulled back by the connecting bracket and limited and reset by the limiting block, and in conjunction with the high-impedance component, all-round shielding and reset are achieved, thereby improving the sensing accuracy and reliability.

[0014] 2. In this utility model, the self-locking hydraulic press drives the adjustment plate, which in turn adjusts the angle of the flip plate and allows it to bend freely, thus avoiding poor contact due to lead wire pulling. At the same time, the soft pad cushions the impact and extends the service life. The self-locking hydraulic press maintains the angle to ensure stable operation of the sensor, thereby improving the adjustment flexibility and structural stability of the equipment. Attached Figure Description

[0015] Figure 1 This is a perspective view of the high impedance nitrogen oxide gas sensor proposed in this utility model; Figure 2 This is a schematic diagram of a partial pipeline structure for the high impedance nitrogen oxide gas sensor proposed in this utility model. Figure 3 This is a schematic diagram of the inner ring structure of the high impedance nitrogen oxide gas sensor proposed in this utility model. Figure 4 This is a partial structural diagram of the adjustment plate of the high impedance nitrogen oxide gas sensor proposed in this utility model.

[0016] Legend: 1. Housing; 2. Motor; 3. Support bracket; 4. Drive shaft; 5. Connecting rod; 6. Moving column; 7. Foldable shielding plate; 8. Moving block; 9. Inner ring; 10. Outer ring; 11. Connecting bracket; 12. Limiting block; 13. Top plate; 14. Sensor body; 15. Pipe; 16. Flip plate; 17. Soft pad; 18. Fixed seat; 19. Rotating bracket; 20. Self-locking hydraulic press; 21. Adjusting plate; 22. Flip bracket; 23. Positioning block. Detailed Implementation

[0017] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0018] Reference Figure 1 , Figure 2 and Figure 3 An embodiment of this utility model provides a high-resistance nitrogen oxide gas sensor, including a housing 1, a motor 2 fixedly mounted on the housing 1, a support bracket 3 fixedly connected to the outer wall of the motor 2, a transmission shaft 4 fixedly mounted at the output end of the motor 2, a connecting rod 5 fixedly connected to the outer wall of the transmission shaft 4, a movable column 6 fixedly connected to the outer wall of the connecting rod 5, a foldable shielding plate 7 fixedly connected to the outer wall of the movable column 6, a movable block 8 fixedly connected to the outer wall of the foldable shielding plate 7, an inner ring 9 slidably connected to the outer wall of the movable block 8, an outer ring 10 slidably connected to the outer wall of the movable block 8, a connecting bracket 11 fixedly connected to the outer wall of the movable block 8, a positioning block 23 fixedly connected to the outer wall of the connecting bracket 11, a limiting block 12 fixedly connected to the inner wall of the outer ring 10, a top plate 13 rotatably connected to the outer wall of the transmission shaft 4, and a high-resistance component disposed on the outer wall of the top plate 13. Specifically, firstly, the motor 2, fixed to the inner wall of the housing 1, drives the transmission shaft 4 to rotate. The support bracket 3 guides and restricts the transmission shaft 4, ensuring it rotates around its center point and preventing deviation or detachment. The rotation of the transmission shaft 4 then drives the connecting rod 5, which in turn moves the moving column 6. The moving column 6 then moves the foldable shielding plate 7, thus achieving sensing through shielding at different locations. The moving block 8 supports both the moving column 6 and the foldable shielding plate 7, preventing collapse due to its own weight during sensing at different locations, which would hinder subsequent sensing. The inner ring 9 and outer ring 10 guide the moving block 8. The limiting block 12 ensures that the moving block 8 remains in a circular rotation state when rotating around the drive shaft 4, without any deviation or detachment. When the moving block 8 is in contact with the positioning block 23, it achieves omnidirectional shielding. The positioning block 23 limits the range of movement of the moving block 8, preventing it from shifting and detaching due to excessive movement. At the same time, the connecting bracket 11 acts as a linkage to the moving block 8. When the moving block 8 is in contact with the positioning block 23, it is pulled back by the connecting bracket 11, completing the omnidirectional unfolding. The limiting block 12 further limits the range of movement of the moving block 8, ensuring that it does not detach when returning to the origin. Combined with the high-resistance component, this achieves omnidirectional shielding and reset, improving sensing accuracy and reliability.

[0019] Reference Figure 1 and Figure 2 The high impedance type component includes a sensor body 14, the outer wall of the sensor body 14 is fixedly disposed on the outer wall of the top plate 13, and a pipe 15 is fixedly connected to the outer wall of the sensor body 14. The outer wall of the pipe 15 is fixedly connected to the inner wall of the housing 1. Specifically, the substance entering through pipe 15 is conducted into the sensor body 14 for detection. With the help of the all-round shielding and reset mechanism, the sensing of nitrogen oxide gas is completed. The housing 1 supports pipe 15 and top plate 13 to ensure that there will be no shaking or falling off due to the vibration caused by the gas entering during the detection and conduction. At the same time, the top plate 13 supports sensor body 14 to ensure stability during sensing.

[0020] Reference Figure 3 The outer wall of the drive shaft 4 is rotatably connected to the inner wall of the support bracket 3, and the outer wall of the moving column 6 is slidably connected to the inner wall of the housing 1. Specifically, the support bracket 3 plays a dual role in guiding and supporting the drive shaft 4, ensuring the stability of the drive shaft 4 during rotation and limiting radial movement to prevent deviation. The sliding connection of the moving column 6 to the inner wall of the housing 1 allows the moving column 6 to move along a predetermined path, thereby driving the foldable shielding plate 7 to unfold and retract, achieving effective shielding in different directions and improving sensing efficiency.

[0021] Reference Figure 3 The outer wall of the foldable shielding plate 7 is slidably connected to the inner wall of the housing 1, and the inner wall of the inner ring 9 is fixedly connected to the outer wall of the support bracket 3. Specifically, the foldable shielding plate 7 is slidably connected to the inner wall of the housing 1, and can be flexibly unfolded or retracted according to the movement of the moving column 6, thereby achieving shielding in different directions and effectively improving the coverage and accuracy of the sensing. At the same time, the fixed connection between the inner ring 9 and the support bracket 3 ensures the stability of the moving block 8 during rotation and movement.

[0022] Reference Figure 3 The outer wall of the outer ring 10 is fixedly connected to the inner wall of the housing 1, and the outer wall of the connecting bracket 11 is attached to the outer wall of the inner ring 9. Specifically, the fixed connection between the outer ring 10 and the inner wall of the housing 1 provides stable external support for the rotation and movement of the moving block 8, ensuring that the moving block 8 will not deviate due to external forces during rotation. At the same time, the fit between the connecting bracket 11 and the outer wall of the inner ring 9 further enhances the stability of the moving block 8 during rotation.

[0023] Reference Figure 3 The outer wall of the positioning block 23 is fixedly connected to the outer wall of the inner ring 9, the outer wall of the positioning block 23 is fixedly connected to the inner wall of the outer ring 10, and the outer wall of the limiting block 12 is fixedly connected to the outer wall of the inner ring 9. Specifically, the fixed connection of the positioning block 23 on the inner ring 9 and the outer ring 10 sets the limit for the movement range of the moving block 8. When the moving block 8 moves to contact the positioning block 23, it indicates that the maximum movement range has been reached. At this time, the foldable shielding plate 7 is fully unfolded, achieving an all-round shielding effect. The setting of the limiting block 12 ensures that the moving block 8 can return to the initial position during the reset process, and will not affect the normal operation of the sensor due to excessive movement.

[0024] Reference Figure 1 , Figure 2 and Figure 4A flip plate 16 is fixedly connected to the outer wall of the housing 1. A soft pad 17 is fixedly connected to the outer wall of the flip plate 16. A fixed seat 18 is attached to the outer wall of the soft pad 17. A rotating bracket 19 is rotatably connected to the outer wall of the fixed seat 18. A self-locking hydraulic press 20 is fixedly mounted on the rotating bracket 19. An adjusting plate 21 is fixedly mounted at the output end of the self-locking hydraulic press 20. A flip bracket 22 is rotatably connected to the outer wall of the flip plate 16. The outer wall of the adjusting plate 21 is fixedly connected to the outer wall of the flip plate 16. The outer wall of the flip bracket 22 is fixedly connected to the outer wall of the fixed seat 18. Specifically, the self-locking hydraulic press 20, fixed on the rotating bracket 19, drives the adjusting plate 21 to move. The movement of the adjusting plate 21 causes the tilting plate 16 to adjust its angle, thus achieving free bending with angle adjustment and avoiding poor contact caused by the pulling of the lead wire. The fixed seat 18 supports the tilting bracket 22 and the rotating bracket 19, ensuring that it will not shift or fall off due to its own weight during angle adjustment. At the same time, the tilting bracket 22 restricts and guides the tilting plate 16, ensuring that the tilting plate 16 always moves along the predetermined trajectory during angle adjustment without shaking or shifting. The soft pad 17 acts as a buffer, reducing the impact between the tilting plate 16 and the fixed seat 18 and extending the service life of the equipment. When the self-locking hydraulic press 20 stops driving, the tilting plate 16 can remain at the current angle position, ensuring the stable operation of the sensor, thereby improving the adjustment flexibility and structural stability of the equipment.

[0025] Working principle: When shielding is required, the motor 2 drives the transmission shaft 4 to rotate, which in turn drives the connecting rod 5 to rotate. The rotation of the connecting rod 5 drives the moving column 6 to move, which in turn drives the foldable shielding plate 7 to move. Shielding in different directions achieves sensing. When the moving block 8 is in contact with the positioning block 23, all-round shielding is completed. At the same time, the connecting bracket 11 plays a linkage role with the moving block 8. When the moving block 8 is in contact with the positioning block 23, the connecting bracket 11 pulls it back. The limiting block 12 limits the range of the moving block 8. Combined with the high-resistance component, all-round shielding and reset are achieved, improving the sensing accuracy and reliability. When angle adjustment is required, the self-locking hydraulic press 20 is started to drive the adjusting plate 21 to move. The movement of the adjusting plate 21 drives the tilting plate 16 to adjust the angle, thereby achieving free bending with angle adjustment and avoiding poor contact caused by the pulling of the lead wire. The soft pad 17 plays a buffering role, reducing the impact between the tilting plate 16 and the fixed seat 18 and extending the service life of the equipment. When the self-locking hydraulic press 20 stops driving, the tilting plate 16 can remain at the current angle position to ensure the stable operation of the sensor, thereby achieving the effect of improving the adjustment flexibility and structural stability of the equipment. This means that the sensor not only achieves comprehensive shielding and reset, improving sensing accuracy and reliability, but also enhances the flexibility of equipment adjustment and structural stability.

[0026] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-impedance nitrogen oxide gas sensor, comprising a housing (1), characterized in that: A motor (2) is fixedly mounted on the housing (1). A support bracket (3) is fixedly connected to the outer wall of the motor (2). A transmission shaft (4) is fixedly mounted at the output end of the motor (2). A connecting rod (5) is fixedly connected to the outer wall of the transmission shaft (4). A moving column (6) is fixedly connected to the outer wall of the connecting rod (5). A foldable shielding plate (7) is fixedly connected to the outer wall of the moving column (6). A moving block (8) is fixedly connected to the outer wall of the foldable shielding plate (7). An inner ring (9) is slidably connected to the outer wall of the moving block (8). An outer ring (10) is slidably connected to the outer wall of the moving block (8). A connecting bracket (11) is fixedly connected to the outer wall of the moving block (8). A positioning block (23) is fixedly connected to the outer wall of the connecting bracket (11). A limiting block (12) is fixedly connected to the inner wall of the outer ring (10). A top plate (13) is rotatably connected to the outer wall of the transmission shaft (4). A high-resistance component is provided on the outer wall of the top plate (13).

2. The high impedance nitrogen oxide gas sensor according to claim 1, characterized in that: The high impedance component includes a sensor body (14), the outer wall of which is fixedly disposed on the outer wall of the top plate (13), and a pipe (15) is fixedly connected to the outer wall of the sensor body (14), the outer wall of which is fixedly connected to the inner wall of the housing (1).

3. The high impedance nitrogen oxide gas sensor according to claim 1, characterized in that: The outer wall of the drive shaft (4) is rotatably connected to the inner wall of the support bracket (3), and the outer wall of the movable column (6) is slidably connected to the inner wall of the housing (1).

4. The high impedance nitrogen oxide gas sensor according to claim 1, characterized in that: The outer wall of the foldable shielding plate (7) is slidably connected to the inner wall of the housing (1), and the inner wall of the inner ring (9) is fixedly connected to the outer wall of the support bracket (3).

5. The high impedance nitrogen oxide gas sensor according to claim 1, characterized in that: The outer wall of the outer ring (10) is fixedly connected to the inner wall of the housing (1), and the outer wall of the connecting bracket (11) is attached to the outer wall of the inner ring (9).

6. The high impedance nitrogen oxide gas sensor according to claim 1, characterized in that: The outer wall of the positioning block (23) is fixedly connected to the outer wall of the inner ring (9), the outer wall of the positioning block (23) is fixedly connected to the inner wall of the outer ring (10), and the outer wall of the limiting block (12) is fixedly connected to the outer wall of the inner ring (9).

7. The high impedance nitrogen oxide gas sensor according to claim 1, characterized in that: A flip plate (16) is fixedly connected to the outer wall of the housing (1). A soft pad (17) is fixedly connected to the outer wall of the flip plate (16). A fixed seat (18) is attached to the outer wall of the soft pad (17). A rotating bracket (19) is rotatably connected to the outer wall of the fixed seat (18). A self-locking hydraulic press (20) is fixedly installed on the rotating bracket (19). An adjusting plate (21) is fixedly installed at the output end of the self-locking hydraulic press (20). A flip bracket (22) is rotatably connected to the outer wall of the flip plate (16).

8. The high impedance nitrogen oxide gas sensor according to claim 7, characterized in that: The outer wall of the adjusting plate (21) is fixedly connected to the outer wall of the flip plate (16), and the outer wall of the flip bracket (22) is fixedly connected to the outer wall of the fixed seat (18).

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