Detection device of automobile electromechanical engineering sensor
By designing a detection device for detecting oxygen sensors, including a polishing device, a temperature measurement component and a pressurized component, the problem of difficulty in detecting oxygen sensors in the prior art is solved, and a multi-faceted detection of oxygen sensors is realized, which improves detection accuracy and provides clear fault analysis.
Patent Information
- Application Number
- CN202510464931.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-15
- Publication Date
- 2025-05-27
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The prior art is difficult to effectively detect damage to automobile oxygen sensors, especially due to the high temperature environment and the presence of heating rods, the multimeter cannot directly measure the damage to the oxygen sensor.
A detection device for automotive electromechanical engineering sensors is designed, including a detection table, a detection tube, a grinding device, a temperature measurement assembly and a pressurization assembly. The detection head of the oxygen sensor is polished through the grinding device, and the temperature measuring assembly detects the working state of the heating rod, measures the sealing properties and imitates the working environment of the oxygen sensor for detection.
It realizes multi-faceted detection of oxygen sensors, improves detection accuracy, and can understand the causes of oxygen sensor failures, and provides clear guidance on car repair work.
Smart Images
Figure CN120044104A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of sensor detection devices, and in particular relates to a detection device for an automobile electromechanical engineering sensor. Background Art
[0002] Automotive electromechanical sensors are an important part of automotive electronic control systems, equivalent to the "sensory organs" of the car, which can convert various non-electrical signals into electrical signals and transmit them to the electronic control unit (ECU) to achieve electronic control. Existing automotive electromechanical sensors mainly include intake pressure sensors, throttle position sensors, intake temperature sensors, vehicle speed sensors, and oxygen sensors.
[0003] During the use of the car, as the years of use increase, the sensors in the car will inevitably be damaged. At this time, it is necessary to detect the sensors to determine whether the car reports a fault code due to damage to the sensors. When detecting the oxygen sensor, the general detection method is to use a multimeter to detect the resistance and voltage of the oxygen sensor to determine whether the oxygen sensor is damaged. However, unlike general sensors, the operating temperature of the oxygen sensor is generally higher (generally 300℃ - 800℃). Therefore, in order to ensure the normal operation of the oxygen sensor, the detection end of the oxygen sensor generally has a built-in heating rod. If the heating rod is damaged, it will also cause the oxygen sensor to work abnormally. In addition, the oxygen sensor has a high sensitivity. When the sealing ring of the oxygen sensor is damaged, the oxygen sensor will also have abnormal detection, which will cause the car's ECU to report a fault code. The above two situations cannot be directly measured by a multimeter.
[0004] Therefore, it is necessary to invent a detection device for an automobile electromechanical engineering sensor to solve the above problems. Summary of the invention
[0005] In view of the above problems, the present invention provides a detection device for an automobile electromechanical engineering sensor to solve the problems raised in the above background technology.
[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a detection device for an automobile electromechanical engineering sensor, comprising a detection platform, a detection tube is horizontally installed on the top of the detection platform, an oxygen sensor to be detected is threadedly inserted at one end of the detection tube, a grinding device is arranged at a position opposite to the oxygen sensor inside the detection tube, the grinding device comprises a grinding roller, a fixed shaft, a one-way gear, a tooth plate and a clamping assembly, the grinding roller is vertically arranged, and the middle section of the grinding roller is made of metal, the fixed shaft is fixedly inserted through the two end axes of the grinding roller, the one-way gear It is sleeved on the fixed shaft near the top, the toothed plate is located on the rear side of the one-way gear, the toothed plate is fixedly connected to the inner wall at the top of the detection tube, and the teeth on the toothed plate are meshed with the one-way gear, there are two clamping assemblies, and the two clamping assemblies are respectively located at both ends of the fixed shaft, the rear side of the detection tube is connected to a temperature measuring assembly, the top of the detection tube is connected to a first pressure gauge, the rear side of the detection tube is connected to a one-way valve, the front side of the detection tube is connected to an exhaust pipe, and an electronic control valve is installed at the front end of the exhaust pipe, and the end of the detection tube away from the oxygen sensor is connected to a pressurizing assembly.
[0007] Furthermore, the clamping assembly includes a clamping block, a clamping spring and a mounting strip, wherein the mounting strip is fixedly connected to the inner wall of the detection tube, and the mounting strip, the axis of the detection tube and the fixed shaft are all located in the same vertical plane, a strip-shaped mounting groove is provided on the side of the mounting strip close to the grinding roller, and the clamping block is slidably installed in the mounting groove, the clamping block is rotatably connected to the end of the fixed shaft, the clamping spring is fixed to the side of the clamping spring away from the oxygen sensor, and the end of the clamping spring away from the clamping block is fixedly connected to the inner wall of the side of the mounting groove close to the pressurizing assembly.
[0008] Furthermore, the temperature measuring component includes a temperature sensor, which is located on the rear side of the detection tube and installed on the top of the detection platform. The front side of the temperature sensor is connected to a detection rod, which is fixedly inserted into the rear side of the detection tube. The front side of the detection rod is fixedly connected to an arc-shaped elastic detection piece, and the elastic detection piece can maintain fit with the middle section of the grinding roller.
[0009] Furthermore, the pressurizing assembly includes a piston plate, an electric push rod, a sealing cylinder and a second pressure gauge, the piston plate is installed at a position inside the detection tube away from one end of the oxygen sensor, the electric push rod is vertically connected to the center of the piston plate away from the oxygen sensor, and the electric push rod is inserted into the end of the detection tube, the sealing cylinder is sleeved on the outside of the electric push rod, and the sealing cylinder and the detection tube are detachably connected together, and the second pressure gauge is installed on the top of the sealing cylinder.
[0010] Furthermore, the oxygen sensor includes a detection head and two detection wires, a bump is installed on the top of the detection platform, two terminals are installed on the top of the bump, and the two terminals are respectively connected to the two detection wires, and a detection host is installed on the top of the detection platform.
[0011] Furthermore, the one-way valve and the exhaust pipe are both aligned with one end of the oxygen sensor located in the detection tube, and the one-way valve only allows gas to flow into the detection tube.
[0012] Furthermore, the one-way gear is always meshed with the toothed plate, and the idling direction of the one-way gear is the same as the direction in which the oxygen sensor moves out of the detection tube.
[0013] Furthermore, protective plates are rotatably sleeved on both ends of the fixed shaft, and the protective plates are slidably installed together with the side of the mounting strip close to the grinding roller. The length of the protective plates is greater than the length of the mounting strip, and the protective plates can always close the mounting groove.
[0014] Furthermore, a fixed plate is fixedly connected between the two protective plates, the fixed plate is located on the side of the grinding roller away from the oxygen sensor, and bristles are evenly installed on the side of the fixed plate facing the grinding roller, and the bristles can maintain contact with the metal part of the middle section of the grinding roller.
[0015] Technical effects and advantages of the present invention: 1. When testing the oxygen sensor, the present invention can test the oxygen sensor by measuring temperature, sealing, temperature and simulating the working environment of the oxygen sensor, so as to improve the detection accuracy and understand the cause of the oxygen sensor failure, thereby providing clear guidance for subsequent automobile maintenance work; 2. The present invention is provided with a grinding roller. When the detection head of the oxygen sensor contacts the grinding roller during the process of inserting the oxygen sensor into the detection tube, as the oxygen sensor pushes the grinding roller to move, the toothed plate can drive the grinding roller to rotate by acting on the one-way gear, thereby grinding the detection head of the oxygen sensor through the grinding roller, thereby grinding away the carbon deposits attached to the detection head due to long-term use, and ensuring that the detection probe can maintain good contact with the grinding roller; 3. The present invention is provided with a protective plate. When the grinding roller grinds the carbon deposits on the end of the oxygen sensor, the protective plate can shield and protect the installation groove to prevent the carbon deposits polished off from falling into the installation groove, thereby affecting the compression spring. In addition, bristles are provided on the fixed plate. During the rotation of the grinding roller, the bristles can brush against the surface of the grinding roller, thereby brushing off the carbon deposits stuck on the surface of the grinding roller from the surface of the grinding roller, thereby preventing the carbon deposits from sticking to the surface of the grinding roller. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a three-dimensional schematic diagram of the structures of the detection tube, oxygen sensor, temperature sensor, etc. in the present invention; Figure 3 It is a three-dimensional cross-sectional view of the sealing tube and the detection tube in the present invention; Figure 4 The present invention Figure 3 A magnified view of part A; Figure 5 It is a three-dimensional schematic diagram of structures such as a protective plate, a grinding roller, a one-way gear and a compression spring in the present invention; Figure 6 It is a three-dimensional schematic diagram of structures such as a detection rod, an elastic detection sheet, a grinding roller and a one-way gear in the present invention; Figure 7 It is a three-dimensional cross-sectional view of the detection tube in the present invention.
[0017] In the figure: 1. test table; 2. test tube; 3. oxygen sensor; 4. grinding roller; 5. fixed shaft; 6. one-way gear; 7. tooth plate; 8. first pressure gauge; 9. one-way valve; 10. exhaust pipe; 11. electronic control valve; 12. clamping block; 13. clamping spring; 14. mounting strip; 15. temperature sensor; 16. test rod; 17. elastic test piece; 18. piston plate; 19. electric push rod; 20. sealing cylinder; 21. second pressure gauge; 22. bump; 23. terminal; 24. test host; 25. protective plate; 26. fixed plate; 27. brush. DETAILED DESCRIPTION
[0018] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.
[0019] The present invention provides Figures 1 to 7The detection device of an automobile electromechanical engineering sensor shown in the figure comprises a detection platform 1, a detection tube 2 is horizontally installed on the top of the detection platform 1, an oxygen sensor 3 to be detected is threadedly plugged into one end of the detection tube 2, a grinding device is arranged at a position opposite to the oxygen sensor 3 inside the detection tube 2, the grinding device comprises a grinding roller 4, a fixed shaft 5, a one-way gear 6, a tooth plate 7 and a clamping assembly, the grinding roller 4 is vertically arranged, and the middle section of the grinding roller 4 is made of metal, the fixed shaft 5 is fixedly penetrated and plugged into the detection tube 2, and the grinding roller 4 is vertically arranged, and the middle section of the grinding roller 4 is made of metal, and the fixed shaft 5 is fixedly inserted through the detection tube 2. At the axis of both ends of the grinding roller 4, the one-way gear 6 is sleeved on the position of the fixed shaft 5 near the top, the toothed plate 7 is located at the rear side of the one-way gear 6, the toothed plate 7 is fixedly connected to the inner wall of the top of the detection tube 2, and the teeth on the toothed plate 7 are meshed with the one-way gear 6, there are two clamping assemblies, and the two clamping assemblies are respectively located at the two ends of the fixed shaft 5, the rear side of the detection tube 2 is connected to a temperature measuring assembly, the top of the detection tube 2 is connected to a first pressure gauge 8, and the rear side of the detection tube 2 is connected to a one-way valve 9 The front side of the detection tube 2 is connected to an exhaust pipe 10, and an electronic control valve 11 is installed at the front end of the exhaust pipe 10. The end of the detection tube 2 away from the oxygen sensor 3 is connected to a pressurizing assembly, and the pressurizing assembly includes a piston plate 18, an electric push rod 19, a sealing cylinder 20 and a second pressure gauge 21. The piston plate 18 is installed at a position away from the end of the detection tube 2 away from the oxygen sensor 3. The electric push rod 19 is vertically connected to the center of the piston plate 18 away from the oxygen sensor 3, and the electric push rod 19 penetrates the plug At the end of the detection tube 2, the sealing cylinder 20 is sleeved on the outside of the electric push rod 19, and the sealing cylinder 20 and the detection tube 2 are detachably connected together, the second pressure gauge 21 is installed on the top of the sealing cylinder 20, the one-way valve 9 and the exhaust pipe 10 are both kept facing the end of the oxygen sensor 3 located in the detection tube 2, and the one-way valve 9 only allows the gas to flow into the detection tube 2, the one-way gear 6 is always meshed with the gear plate 7, and the idling direction of the one-way gear 6 is the same as the direction in which the oxygen sensor 3 moves out of the detection tube 2; The oxygen sensor 3 includes a detection head and two detection wires. A convex block 22 is installed on the top of the detection platform 1. Two binding posts 23 are installed on the top of the convex block 22. The two binding posts 23 are respectively connected to the two detection wires. A detection host 24 is installed on the top of the detection platform 1. When testing the oxygen sensor 3, the detection head of the oxygen sensor 3 is inserted into the detection tube 2 and tightened. During the process of inserting the oxygen sensor 3 into the detection tube 2, when the detection head of the oxygen sensor 3 contacts the grinding roller 4, as the oxygen sensor 3 pushes the grinding roller 4 to move, the pressing assembly is gradually compressed. At the same time, as the grinding roller 4 moves, the grinding roller 4 can drive the one-way gear 6 to roll along the toothed plate 7 through the fixed shaft 5. In this process, the toothed plate 7 can drive the grinding roller 4 to rotate by exerting force on the one-way gear 6, so that the detection head part of the oxygen sensor 3 is polished by the grinding roller 4, so that the carbon deposits attached to the detection head due to long-term use can be polished off, ensuring that the detection probe can maintain good contact with the grinding roller 4. When the oxygen sensor 3 is fully inserted into the detection tube 2, the oxygen sensor 3 is twisted so that the oxygen sensor 3 can be screwed together with the detection tube 2, and at this time, the grinding roller 4 is also tightly attached to the temperature measuring assembly; Then, the two detection lines of the oxygen sensor 3 are respectively connected to the two terminals 23 on the protrusion 22. When the detection lines are connected, the detection host 24 controls the electric push rod 19 to work, so that the piston plate 18 can move towards the detection head under the push of the electric push rod 19. In this process, the air in the space on the side of the piston plate 18 close to the detection head in the detection tube 2 can be compressed, and the indication of the first pressure gauge 8 is also increased. Then the electric push rod 19 is stopped, and the detection tube 2 is pressure-maintained for a period of time. During the pressure-maintaining period, if the indication of the first pressure gauge 8 does not change, it proves that the sealing of the oxygen sensor 3 is intact, and when the indication of the first pressure gauge 8 decreases, it proves that there is a problem with the sealing of the oxygen sensor 3. In addition, by providing a second pressure gauge 21, when judging whether there is a problem with the sealing of the oxygen sensor 3 by the first pressure gauge 8, the second pressure gauge 21 can detect the pressure in the sealing tube 20, so as to avoid misjudgment of the sealing of the oxygen sensor 3 due to leakage at the connection between the electric push rod 19 and the detection tube 2; While testing the sealing of the oxygen sensor 3, the oxygen sensor 3 can be controlled to work by the testing host 24, so that the temperature of the oxygen sensor 3 can be tested by the temperature measuring component. If the heating rod in the oxygen sensor 3 is in a normal state, as the oxygen sensor 3 works, the temperature generated by the oxygen sensor 3 can be transmitted to the temperature measuring component through the grinding roller 4. When the temperature measuring component detects a temperature rise, it proves that the heating rod of the oxygen sensor 3 works normally. If there is no obvious change in the detected temperature, it proves that the heating rod in the oxygen sensor 3 is damaged. When the sealing test is completed, the electronic control valve 11 is controlled to open by the test host 24. At this time, the compressed air in the test tube 2 can be discharged through the exhaust pipe 10. When the air is exhausted, the electronic control valve 11 is controlled to close by the test host 24. At this time, as the electric push rod 19 drives the piston plate 18 to reset, the air pressure in the test tube 2 gradually decreases, and then the one-way valve 9 can be automatically opened under the pressure of the external atmospheric pressure. At this time, the external air can be sprayed onto the detection head of the oxygen sensor 3 through the position of the one-way valve 9, thereby simulating the working environment of the oxygen sensor 3. At this time, the detection data of the oxygen sensor 3 can be recorded by the test host 24. If there is an obvious change in the data, it proves that the oxygen sensor 3 can normally detect the oxygen content in the air. Otherwise, it means that the oxygen sensor 3 is damaged. The present invention detects the oxygen sensor 3 by measuring the temperature, sealing, and temperature as well as simulating the working environment of the oxygen sensor 3, thereby improving the detection accuracy and specifically understanding the cause of the malfunction of the oxygen sensor 3, thereby providing clear guidance for subsequent automobile maintenance work.
[0020] like Figures 1 to 5 As shown, the clamping assembly includes a clamping block 12, a clamping spring 13 and a mounting strip 14, the mounting strip 14 is fixedly connected to the inner wall of the detection tube 2, and the mounting strip 14 and the axis of the detection tube 2 and the fixed shaft 5 are all located in the same vertical plane, the mounting strip 14 is provided with a strip-shaped mounting groove on the side close to the grinding roller 4, and the clamping block 12 is slidably installed in the mounting groove, the clamping block 12 is rotatably connected to the end of the fixed shaft 5, the clamping spring 13 is fixed to the side of the clamping spring 13 away from the oxygen sensor 3, and the end of the clamping spring 13 away from the clamping block 12 is fixedly connected to the inner wall of the side of the mounting groove close to the pressurizing assembly; The temperature measuring assembly includes a temperature sensor 15, which is located at the rear side of the detection tube 2. The temperature sensor 15 is installed on the top of the detection platform 1. The front side of the temperature sensor 15 is connected to a detection rod 16, which is fixedly inserted into the rear side of the detection tube 2. The front side of the detection rod 16 is fixedly connected to an arc-shaped elastic detection piece 17, and the elastic detection piece 17 can be kept in contact with the middle section of the grinding roller 4. By providing a temperature measuring component, during the process of inserting the oxygen sensor 3 into the detection tube 2, when the oxygen sensor 3 contacts the grinding roller 4, as the oxygen sensor 3 squeezes the grinding roller 4, the grinding roller 4 can drive the two clamping blocks 12 to move along the corresponding mounting grooves toward the direction close to the piston plate 18. During this process, the clamping block 12 can gradually squeeze the clamping spring 13, so that the grinding roller 4 can keep close to the oxygen sensor 3 under the reaction of the clamping spring 13 to the clamping block 12, and when the oxygen sensor 3 is screwed together with the detection tube 2, the elastic detection sheet 17 is also just It is best to be close to the surface of the grinding roller 4. As the oxygen sensor 3 is started, the heat generated by the oxygen sensor 3 can be transferred to the elastic detection sheet 17 through the grinding roller 4, and then the elastic detection sheet 17 can transfer the heat to the temperature sensor 15 through the detection rod 16. Then the temperature sensor 15 can feed back the temperature data to the detection host 24, so that according to the data transmitted by the temperature sensor 15, it can be known whether the heating rod in the oxygen sensor 3 is damaged (if the temperature gradually increases, the ring is not damaged, if the temperature remains unchanged, it is damaged), thereby improving the accuracy of the detection of the oxygen sensor 3.
[0021] like Figures 3 to 5 As shown, both ends of the fixed shaft 5 are rotatably sleeved with protective plates 25, and the protective plates 25 are slidably mounted together with the side of the mounting strip 14 close to the grinding roller 4, the length of the protective plates 25 is greater than the length of the mounting strip 14, and the protective plates 25 can always close the mounting groove, and a fixed plate 26 is fixedly connected between the two protective plates 25, and the fixed plate 26 is located on the side of the grinding roller 4 away from the oxygen sensor 3, and the side of the fixed plate 26 facing the grinding roller 4 is evenly installed with bristles 27, and the bristles 27 can keep in contact with the metal part of the middle section of the grinding roller 4; By providing a protective plate 25, when the grinding roller 4 grinds the carbon deposits on the end of the oxygen sensor 3, the protective plate 25 can shield and protect the installation groove to prevent the carbon deposits grinded from falling into the installation groove, thereby affecting the clamping spring 13. In addition, by providing bristles 27 on the fixed plate 26, the bristles 27 can brush along the surface of the grinding roller 4 during the rotation of the grinding roller 4, thereby brushing off the carbon deposits stuck on the surface of the grinding roller 4 from the surface of the grinding roller 4 to prevent the carbon deposits from sticking to the surface of the grinding roller 4.
[0022] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.
Claims
1. A detection device for an automotive electromechanical engineering sensor, comprising a detection platform (1), characterized in that: A detection tube (2) is horizontally mounted on the top of the detection platform (1), one end of the detection tube (2) is threadedly plugged with an oxygen sensor (3) to be detected, a grinding device is arranged inside the detection tube (2) at a position directly opposite to the oxygen sensor (3), the grinding device comprising a grinding roller (4), a fixed shaft (5), a one-way gear (6), a toothed plate (7) and a clamping assembly, the grinding roller (4) is arranged vertically, and the middle section of the grinding roller (4) is made of metal, the fixed shaft (5) is fixedly inserted through the two ends of the grinding roller (4), the one-way gear (6) is sleeved on a position close to the top of the fixed shaft (5), and the toothed plate (7) is located at the one-way gear. The toothed plate (7) is fixedly connected to the inner wall of the top of the detection tube (2), and the teeth on the toothed plate (7) mesh with the one-way gear (6). There are two clamping assemblies, and the two clamping assemblies are respectively located at the two ends of the fixed shaft (5). The rear side of the detection tube (2) is connected to a temperature measuring assembly, the top of the detection tube (2) is connected to a first pressure gauge (8), the rear side of the detection tube (2) is connected to a one-way valve (9), the front side of the detection tube (2) is connected to an exhaust pipe (10), and an electronic control valve (11) is installed at the front end of the exhaust pipe (10), and the end of the detection tube (2) away from the oxygen sensor (3) is connected to a pressurizing assembly.
2. The detection device of the automotive electromechanical engineering sensor according to claim 1 is characterized in that: The clamping assembly comprises a clamping block (12), a clamping spring (13) and a mounting strip (14); the mounting strip (14) is fixedly connected to the inner wall of the detection tube (2); and the mounting strip (14) and the axis of the detection tube (2) and the fixed shaft (5) are all located in the same vertical plane; a strip-shaped mounting groove is provided on a side of the mounting strip (14) close to the grinding roller (4); and the clamping block (12) is slidably mounted in the mounting groove; the clamping block (12) is rotatably connected to the end of the fixed shaft (5); the clamping spring (13) is fixed to a side of the clamping spring (13) away from the oxygen sensor (3); and an end of the clamping spring (13) away from the clamping block (12) is fixedly connected to the inner wall of the mounting groove on a side close to the pressurizing assembly.
3. The detection device of the automotive electromechanical engineering sensor according to claim 2 is characterized in that: The temperature measuring component comprises a temperature sensor (15), the temperature sensor (15) is located at the rear side of the detection tube (2), the temperature sensor (15) is installed on the top of the detection platform (1), the front side of the temperature sensor (15) is connected to a detection rod (16), the detection rod (16) is fixedly inserted through the rear side of the detection tube (2), the front side of the detection rod (16) is fixedly connected to an arc-shaped elastic detection sheet (17), and the elastic detection sheet (17) can maintain contact with the middle section of the grinding roller (4).
4. The detection device of the automotive electromechanical engineering sensor according to claim 3 is characterized in that: The pressurizing assembly comprises a piston plate (18), an electric push rod (19), a sealing cylinder (20) and a second pressure gauge (21); the piston plate (18) is mounted at a position inside the detection tube (2) away from one end of the oxygen sensor (3); the electric push rod (19) is vertically connected to the center of a circle on the side of the piston plate (18) away from the oxygen sensor (3); the electric push rod (19) penetrates and is inserted into the end of the detection tube (2); the sealing cylinder (20) is sleeved on the outside of the electric push rod (19); the sealing cylinder (20) and the detection tube (2) are detachably connected together; and the second pressure gauge (21) is mounted on the top of the sealing cylinder (20).
5. The detection device of the automobile electromechanical engineering sensor according to claim 4 is characterized in that: The oxygen sensor (3) comprises a detection head and two detection wires; a protrusion (22) is installed on the top of the detection platform (1); two binding posts (23) are installed on the top of the protrusion (22); and the two binding posts (23) are respectively connected to the two detection wires; and a detection host (24) is installed on the top of the detection platform (1).
6. The detection device of the automobile electromechanical engineering sensor according to claim 5 is characterized in that: The one-way valve (9) and the exhaust pipe (10) are both aligned with one end of the oxygen sensor (3) located in the detection tube (2), and the one-way valve (9) only allows gas to flow into the detection tube (2).
7. The detection device of the automobile electromechanical engineering sensor according to claim 6, characterized in that: The one-way gear (6) always remains in mesh with the toothed plate (7), and the idling direction of the one-way gear (6) is the same as the direction in which the oxygen sensor (3) moves out of the detection tube (2).
8. The detection device of the automotive electromechanical engineering sensor according to claim 2, characterized in that: Both ends of the fixed shaft (5) are rotatably sleeved with protective plates (25), and the protective plates (25) are slidably mounted together with a side of the mounting strip (14) close to the grinding roller (4). The length of the protective plates (25) is greater than the length of the mounting strip (14), and the protective plates (25) are always able to close the mounting groove.
9. The detection device of the automobile electromechanical engineering sensor according to claim 8, characterized in that: A fixing plate (26) is fixedly connected between the two protection plates (25), the fixing plate (26) being located on a side of the grinding roller (4) away from the oxygen sensor (3), and bristles (27) are evenly installed on a side of the fixing plate (26) directly opposite to the grinding roller (4), the bristles (27) being able to maintain contact with a metal portion of a middle section of the grinding roller (4).
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