A durability testing apparatus and method for a sensor

Abstract

The application discloses a kind of durability test device and method of sensor, it is related to sensor detection technical field, including support frame and electric push rod, the inside of the support frame is provided with linear drive device, further include: heating device, the heating device is fixedly installed on the surface of support frame, heating wire is arranged on the heating device;Heat preservation bin, the heat preservation bin is fixedly installed on the circumference of heating device, the top of the heat preservation bin is provided with through-hole;Long rod, the long rod is slidably penetrated in the top of support frame, and the top of the long rod is fixedly connected with the output end of electric push rod;Hollow cylinder, the hollow cylinder is fixedly installed at the bottom of long rod;By plugging the through-hole of heat preservation bin, it is helpful to reduce the loss of temperature inside heat preservation bin, in continuous durability test, resource consumption can be reduced, and the overall efficiency of test is improved.

Description

Technical Field

[0001] This invention relates to the field of sensor testing technology, specifically to a sensor durability testing device and method. Background Technology

[0002] Durability testing equipment for temperature sensors is typically used to simulate and evaluate the performance and stability of temperature sensors under different environmental conditions, ensuring that they do not fail or degrade in performance during long-term use.

[0003] Patent publication number CN218036648U relates to a high-temperature durability testing device for a nitrogen-oxygen sensor, including a power supply assembly and a probe mounting bracket. The power supply assembly is connected to an industrial computer, a voltage regulator, a heater, and a motor controller. The industrial computer is connected to the motor controller, which is connected to a linear motor. The motor controller controls the forward and reverse rotation of the linear motor. This device heats the ambient temperature around the nitrogen-oxygen sensor through the heater, thereby ensuring that the nitrogen-oxygen sensor can work for a long time at high temperatures of 600°C and 800°C. At the same time, a timer can automatically start and stop the device, automatically cycling 20 times to test the accuracy of the nitrogen-oxygen sensor and the stability of the ceramic core of the nitrogen-oxygen sensor.

[0004] The aforementioned patent has the effect of improving test stability. It can automatically start and stop through a timer, thus automatically cycling 20 times to test the accuracy of the nitrogen and oxygen sensor. However, during the high-temperature durability test, the test not only requires cyclical hot and cold testing of the sensor, but also requires reheating after each cooling. This not only significantly prolongs the test time, but also leads to energy waste and resource consumption, and increases the burden on the test equipment. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a sensor durability testing device and method, which solves the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a sensor durability testing device, comprising a support frame and an electric push rod, wherein a linear drive device is provided inside the support frame, and further comprising: a heating device, the heating device being fixedly installed on the surface of the support frame, the heating device being provided with a heating wire; a heat preservation chamber, the heat preservation chamber being fixedly installed on the circumferential surface of the heating device, the top of the heat preservation chamber having a through hole; a long rod, the long rod slidingly passing through the top of the support frame, the top of the long rod being fixedly connected to the output end of the electric push rod; a hollow cylinder, the hollow cylinder being fixedly installed at the bottom of the long rod, the output end of the electric push rod driving the long rod to move upward, the movement of the long rod causing the hollow cylinder to move upward; a placement frame, the placement frame being fixedly installed on the circumferential surface of the hollow cylinder; a circular ring, the circular ring being fixedly installed on the surface of the placement frame; an elastic sheet, the elastic sheet being disposed on the inner wall of the circular ring; and a compression plate, the compression plate being fixedly installed on the surface of the elastic sheet, the compression plate moving to compress the elastic sheet, the deformed elastic sheet applying a reaction force to the compression plate.

[0007] According to the above technical solution, a movable plate slides through the interior of the hollow cylinder, and a No. 1 spring is provided between the movable plate and the hollow cylinder. A sealing plate is fixedly installed on the surface of the movable plate. When the movable plate moves, it causes the sealing plate to move upward, and at this time, the deformed No. 1 spring gradually returns to its original position.

[0008] According to the above technical solution, the circumferential surface of the hollow cylinder is fitted to the inner wall of the through hole of the heat preservation chamber, the sealing plate is in contact with the top of the heat preservation chamber, and the deformed No. 1 spring applies a downward pulling force to the sealing plate. Under the action of the pulling force, the sealing plate and the heat preservation chamber remain tightly fitted.

[0009] According to the above technical solution, the support frame is equipped with a protective device for cooling the sensor, and the protective device is equipped with an alarm device for improving cooling safety. The protective device includes a connecting rod, a cylinder, a contact frame, a Y-shaped plate, a cylindrical rod, a protective plate, and an outer frame. The sealing plate moves upward and contacts the bottom of the contact frame, causing the sealing plate to push the contact frame upward. The connecting rod slides through the inner and outer walls of the support frame. One end of the connecting rod is fixedly connected to the moving end of the linear drive device. The cylinder is fixedly installed at the other end of the connecting rod. The contact frame slides through the top of the cylinder. The Y-shaped plate is fixedly installed at the top of the contact frame. The cylindrical rod is fixedly installed at the bottom of the Y-shaped plate. The contact frame drives the Y-shaped plate to move upward, and the Y-shaped plate drives the cylindrical rod to move upward. The protective plate is fixedly installed at the bottom of the cylindrical rod. The outer frame is fixedly installed on the circumferential surface of the cylinder. A ventilated plate is provided on the circumferential surface of the cylinder.

[0010] According to the above technical solution, the bottom of the cylinder contacts the top of the insulation chamber, the connecting rod moves to drive the cylinder to move upward, the cylinder moves upward and disengages from the insulation chamber, and the protective plate is set to be arc-shaped.

[0011] According to the above technical solution, the protective plate is in contact with the circumferential surface of the cylinder, and a sliding groove is provided on the outer frame. The protective plate is in contact with the inner wall of the sliding groove. When the protective plate moves, the outer frame provides support for the moving protective plate.

[0012] According to the above technical solution, the alarm device includes a buzzer, a button, a rectangular frame, a rectangular plate, a rotating rod, and an L-shaped plate. The Y-shaped plate moves upward and contacts the L-shaped plate, causing the Y-shaped plate to move and push the L-shaped plate upward. The buzzer is fixedly installed on the top of the cylinder, the button is located at the bottom of the buzzer, the rectangular frame is fixedly installed at the bottom of the buzzer, the rectangular plate is slidably installed inside the rectangular frame, the rotating rod rotates through the inner and outer walls of the rectangular plate, the L-shaped plate is fixedly installed on the surface of the rotating rod, the L-shaped plate drives the rotating rod to move upward, and the rotating rod drives the rectangular plate to move upward. A through groove is provided on the outer wall of the rectangular frame, the rotating rod contacts the inner wall of the through groove, and a spiral spring is provided between the rotating rod and the rectangular plate.

[0013] According to the above technical solution, a slide block is fixedly installed on the surface of the rectangular frame, and a convex rod is slidably installed inside the slide block. A limiting plate is fixedly installed on the circumferential surface of the convex rod. Pushing the limiting plate to move to the other end of the slide block causes the convex rod to move synchronously.

[0014] A method for using a sensor durability testing device, comprising the following steps:

[0015] Step 1: Start the heating device. The insulation wire on the heating device will start to heat up, which will increase the temperature inside the insulation chamber.

[0016] Step 2: The output end of the electric push rod drives the long rod to move upward, the long rod moves the hollow cylinder upward, and the hollow cylinder moves the placement rack to move out of the insulation chamber;

[0017] Step 3: Place the sensor to be tested into the placement rack from top to bottom. After placement, the output end of the electric push rod drives the long rod to move down to the starting position.

[0018] Step 4: After the placement rack is moved to the starting position, the high-temperature gas in the insulation chamber comes into contact with the sensor to conduct a high-temperature durability test.

[0019] This invention provides a device for testing the durability of sensors. It has the following advantages:

[0020] (1) The durability testing device for the sensor, when the placement rack is moved to the designated position, the bottom of the placement rack is sealed to block the through hole. By blocking the through hole of the heat preservation chamber, it helps to reduce the loss of temperature inside the heat preservation chamber. In continuous durability testing, it can reduce the consumption of resources and improve the overall efficiency of the test.

[0021] (2) The durability testing device for the sensor has an elastic sheet that applies a reaction force to the extrusion plate, making the extrusion plate and the sensor in close contact. The reaction force applied by the elastic sheet allows the extrusion plate to adapt to different sensor sizes, making it convenient to stabilize different sensors. At the same time, the No. 1 spring applies a downward pulling force to the sealing plate. The No. 1 spring is pulled down by the hollow cylinder, which improves the fit between the sealing plate and the heat preservation chamber and ensures the efficiency of the heat preservation chamber's heating.

[0022] (3) The durability testing device of the sensor moves the protective plate up to release the seal on the cylindrical vent plate. Through the various uses of the connecting rod, different effects can be achieved, which helps to improve the flexibility of the cylinder and the protective plate. At the same time, the protective plate resets to seal the vent plate. When the protective plate is put back into the heat preservation chamber through the placement rack, the protective plate can automatically reset and seal the vent plate, which helps to improve the stability of multiple high temperature tests.

[0023] (4) The durability testing device for this sensor has a rectangular plate that moves and presses the button to start the buzzer. When the protective plate is opened, the buzzer is quickly started to sound an alarm, which helps to improve the safety of the test. At the same time, the limiting plate applies a limit to the rotation of the L-shaped plate. By quickly adjusting the angle of the L-shaped plate and applying an effective limit, it helps to improve the flexibility of operation during the test. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the half-section structure of the present invention;

[0026] Figure 3 This is a schematic diagram of the internal structure of the heat preservation chamber of the present invention;

[0027] Figure 4 This is a schematic diagram of the overall structure of the circular ring of the present invention;

[0028] Figure 5 This is a schematic diagram of the internal structure of the hollow cylinder of the present invention;

[0029] Figure 6 This is a schematic diagram of the internal structure of the cylinder of the present invention;

[0030] Figure 7 This is a schematic diagram of the outer frame structure of the present invention;

[0031] Figure 8 This is a schematic diagram of the location and structure of the breathable plate of the present invention;

[0032] Figure 9 This is a schematic diagram of the overall structure of the buzzer of the present invention;

[0033] Figure 10This is a schematic diagram of the internal structure of the rectangular frame of the present invention.

[0034] In the diagram: 1. Support frame; 2. Heating device; 3. Insulation chamber; 4. Long rod; 5. Hollow cylinder; 6. Placement rack; 7. Ring; 8. Elastic sheet; 9. Extrusion plate; 10. Movable plate; 11. Spring No. 1; 12. Sealing plate; 131. Connecting rod; 132. Cylinder; 133. Contact frame; 134. Y-shaped plate; 135. Cylindrical rod; 136. Protective plate; 137. Outer frame; 141. Buzzer; 142. Button; 143. Rectangular frame; 144. Rectangular plate; 145. Rotating rod; 146. L-shaped plate; 147. Slide seat; 148. Convex rod; 149. Limiting plate. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0036] Please see Figures 1-6 One embodiment of the present invention is: a sensor durability testing device, comprising a support frame 1 and an electric push rod, wherein a linear drive device is provided inside the support frame 1, and further comprising: a heating device 2, which is fixedly installed on the surface of the support frame 1 and has a heating wire; a heat preservation chamber 3, which is fixedly installed on the circumferential surface of the heating device 2 and has a through hole at the top; a long rod 4, which slides through the top of the support frame 1 and is fixedly connected to the output end of the electric push rod; a hollow cylinder 5, which is fixedly installed at the bottom of the long rod 4; a placement frame 6, which is fixedly installed on the circumferential surface of the hollow cylinder 5; a circular ring 7, which is fixedly installed on the surface of the placement frame 6; an elastic sheet 8, which is disposed on the inner wall of the circular ring 7; and a pressing plate 9, which is fixedly installed on the surface of the elastic sheet 8. When the placement frame 6 moves to a designated position, the bottom of the placement frame 6 seals the through hole to reduce the loss of temperature inside the heat preservation chamber 3.

[0037] A movable plate 10 slides through the interior of the hollow cylinder 5. A spring 11 is provided between the movable plate 10 and the hollow cylinder 5. A sealing plate 12 is fixedly installed on the surface of the movable plate 10. The reaction force applied by the elastic sheet 8 allows the extrusion plate 9 to adapt to the size of different sensors, making it convenient to stabilize different sensors.

[0038] The circumferential surface of the hollow cylinder 5 fits into the inner wall of the through hole of the heat preservation chamber 3, and the sealing plate 12 contacts the top of the heat preservation chamber 3. By pulling down the No. 1 spring 11 through the hollow cylinder 5, the fit between the sealing plate 12 and the heat preservation chamber 3 is improved, ensuring the heating efficiency of the heat preservation chamber 3.

[0039] A method for using a sensor durability testing device, comprising the following steps:

[0040] Step 1: Start heating device 2. The insulation wire on heating device 2 begins to heat up, which in turn increases the temperature inside insulation chamber 3.

[0041] Step 2: The output end of the electric push rod drives the long rod 4 to move upward, the long rod 4 moves and drives the hollow cylinder 5 to move upward, the hollow cylinder 5 moves and drives the placement rack 6 to move out of the insulation chamber 3;

[0042] Step 3: Place the sensor to be tested into the placement rack 6 from top to bottom. After placement, the output end of the electric push rod drives the long rod 4 to move down to the starting position.

[0043] Step 4: After the placement rack 6 is moved to the starting position, the high-temperature gas in the heat preservation chamber 3 comes into contact with the sensor to conduct a high-temperature durability test.

[0044] In this embodiment, during operation, heating device 2 is activated, raising the temperature inside the insulation chamber 3. As the insulation chamber 3 heats up, the output end of the electric push rod drives the long rod 4 upwards. The movement of the long rod 4 causes the hollow cylinder 5 to move upwards, which in turn causes the placement rack 6 to move upwards. Simultaneously, the movement of the hollow cylinder 5 causes the movable plate 10 to move upwards, which in turn causes the sealing plate 12 to move upwards. At this time, the deformed first spring 11 gradually returns to its original position. When the placement rack 6 moves to the designated position, the bottom of the placement rack 6 seals the through hole, reducing the loss of temperature inside the insulation chamber 3. The sensor to be tested is placed from top to bottom inside the placement rack 6. The sensor moves and contacts the curved surface of the extrusion plate 9. The sensor continues to move, pushing the extrusion plate 9 towards the ring 7. The extrusion plate 9 moves and extrudes the elastic sheet 8, and the deformed elastic sheet 8 applies a counterforce to the extrusion plate 9. The force applied by the extrusion plate 9 makes the sensor and the extrusion plate 9 come into close contact. The reaction force applied by the elastic sheet 8 allows the extrusion plate 9 to adapt to different sensor sizes, making it easy to stabilize different sensors. After placement, the output end of the electric push rod drives the long rod 4 to move down to the starting position. The synchronously moving sealing plate 12 comes into contact with the top of the heat preservation chamber 3 during the movement. The sealing plate 12 stops moving due to the obstruction of the heat preservation chamber 3. At this time, the hollow cylinder 5 continues to move and stretches the first spring 11. The deformed first spring 11 applies a downward pulling force to the sealing plate 12. Under the action of the pulling force, the sealing plate 12 and the heat preservation chamber 3 remain in close contact. After the placement rack 6 moves to the starting position, the high temperature durability test of the sensor is carried out. By pulling down the first spring 11 by the hollow cylinder 5, the fit between the sealing plate 12 and the heat preservation chamber 3 is improved, ensuring the heating efficiency of the heat preservation chamber 3.

[0045] Please see Figures 1-10 Based on the above embodiments, in another embodiment of the present invention, the support frame 1 is provided with a protective device for cooling the sensor, and the protective device is provided with an alarm device for improving cooling safety; the protective device includes a connecting rod 131, a cylinder 132, a contact frame 133, a Y-shaped plate 134, a cylindrical rod 135, a protective plate 136, and an outer frame 137. The connecting rod 131 slides through the inner and outer walls of the support frame 1, and one end of the connecting rod 131 is fixedly connected to the moving end of the linear drive device. The cylinder 132 is fixedly installed. At the other end of the connecting rod 131, the contact frame 133 slides through the top of the cylinder 132. The Y-shaped plate 134 is fixedly installed on the top of the contact frame 133, the cylindrical rod 135 is fixedly installed on the bottom of the Y-shaped plate 134, the protective plate 136 is fixedly installed on the bottom of the cylindrical rod 135, and the outer frame 137 is fixedly installed on the circumferential surface of the cylinder 132. A ventilated plate is provided on the circumferential surface of the cylinder 132. Through various uses of the connecting rod 131, different effects can be achieved, which helps to improve the flexibility of use of the cylinder 132 and the protective plate 136.

[0046] The bottom of the cylinder 132 contacts the top of the insulation chamber 3. The protective plate 136 is arc-shaped. When it re-enters the insulation chamber 3 through the placement rack 6, the protective plate 136 can automatically reset and seal the ventilated plate, which helps to improve the stability of multiple high-temperature tests.

[0047] The protective plate 136 contacts the circumferential surface of the cylinder 132. A sliding groove is provided on the outer frame 137. The protective plate 136 contacts the inner wall of the sliding groove. By setting the outer frame 137, the smoothness of the movement of the protective plate 136 is improved, ensuring that the protective plate 136 can be smoothly reset to seal the ventilated plate.

[0048] The alarm device includes a buzzer 141, a button 142, a rectangular frame 143, a rectangular plate 144, a rotating rod 145, and an L-shaped plate 146. The buzzer 141 is fixedly installed on the top of the cylinder 132, the button 142 is located at the bottom of the buzzer 141, the rectangular frame 143 is fixedly installed at the bottom of the buzzer 141, the rectangular plate 144 is slidably installed inside the rectangular frame 143, the rotating rod 145 rotates through the inner and outer walls of the rectangular plate 144, the L-shaped plate 146 is fixedly installed on the surface of the rotating rod 145, a through groove is provided on the outer wall of the rectangular frame 143, the rotating rod 145 contacts the inner wall of the through groove, and a spiral spring is provided between the rotating rod 145 and the rectangular plate 144. When the protective plate 136 is opened, the buzzer 141 is quickly activated to sound an alarm, which helps to improve the safety of the test.

[0049] A slide block 147 is fixedly mounted on the surface of the rectangular frame 143. A convex rod 148 is slidably mounted inside the slide block 147. A limit plate 149 is fixedly mounted on the circumferential surface of the convex rod 148. By quickly adjusting the angle of the L-shaped plate 146 and applying effective limit, the flexibility of operation during the test can be improved.

[0050] In this embodiment, when placing and retrieving the sensor, the linear drive device is first activated, causing its moving end to drive the connecting rod 131 upward. The movement of the connecting rod 131 causes the cylinder 132 to move upward, disengaging it from the insulation chamber 3. At this point, the electric push rod is activated to complete the placement and retrieval of the sensor. When it is necessary to cool down and then heat up the sensor inside the insulation chamber 3, the linear drive device controls the connecting rod 131 to remain stationary in its initial position. The sealing plate 12 moves upward and contacts the bottom of the contact frame 133, causing the sealing plate 12 to push the contact frame 133 upward. The contact frame 133 then drives the Y-shaped plate 134 upward, which in turn drives the cylindrical rod 135 upward. The cylindrical rod 135 then drives the protective plate 136 upward, releasing the seal on the vent plate of the cylinder 132. The sensor is then in a natural cooling system. Through various uses of the connecting rod 131, different effects are achieved, which helps... To improve the flexibility of the use of the cylinder 132 and the protective plate 136, when the sensor is naturally cooled, the high-temperature gas inside the cylinder 132 is discharged to the outside through the vent plate. After the sensor has finished cooling, the long rod 4 moves down to move the placement frame 6 to the initial position, and the sensor after cooling is subjected to a second high-temperature durability test. At the same time, the sealing plate 12 moves down and disengages from the contact frame 133. The contact frame 133, which has lost its support, gradually moves down. The contact frame 133 drives the Y-shaped plate 134 to move down, the Y-shaped plate 134 drives the cylindrical rod 135 to move down, and the cylindrical rod 135 drives the protective plate 136 to move down. After the protective plate 136 returns to the initial position, it re-seals the vent plate. At the same time, the outer frame 137 provides support for the moving protective plate 136. When it re-enters the heat preservation chamber 3 through the placement frame 6, the protective plate 136 can automatically reset and seal the vent plate, which helps to improve the stability of multiple high-temperature tests.

[0051] When the protective plate 136 is opened, the Y-shaped plate 134 moves upward and contacts the L-shaped plate 146, causing the Y-shaped plate 134 to move and push the L-shaped plate 146 upward. The L-shaped plate 146 then moves the rotating rod 145 upward, which in turn moves the rectangular plate 144 upward. The rectangular plate 144 then presses the button 142 to activate the buzzer 141, which sounds an alarm to alert nearby test personnel. When the protective plate 136 is closed, the Y-shaped plate 134 moves downward and separates from the L-shaped plate 146. At this time, the L-shaped plate 146 moves the rotating rod 145 downward, which in turn moves the rectangular plate 144 downward and disengages from the button 142. The buzzer 141 then automatically shuts off the alarm. The rapid activation of the buzzer 141 when the protective plate 136 is opened helps to... To improve testing safety, when the buzzer 141 is not in use, the tester can manually rotate the L-shaped plate 146 during the endurance test. The L-shaped plate 146 drives the rotating rod 145 to rotate, which in turn stretches the spiral spring. When the L-shaped plate 146 rotates to a preset angle, it pushes the limiting plate 149 to move to the other end of the slide 147. The movement of the limiting plate 149 drives the convex rod 148 to move synchronously. At the same time, the limiting plate 149 contacts the L-shaped plate 146 during its movement. At this time, the limiting plate 149 applies a limit to the rotation of the L-shaped plate 146. The Y-shaped plate 134 moves upward and cannot contact the L-shaped plate 146, triggering an alarm. By quickly adjusting the angle of the L-shaped plate 146 and applying an effective limit, the flexibility of operation during the test is improved.

[0052] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A durability testing device for a sensor, comprising a support frame (1) and an electric push rod, wherein a linear drive device is provided inside the support frame (1), characterized in that, Also includes: Heating device (2), the heating device (2) is fixedly installed on the surface of the support frame (1), and the heating device (2) is provided with heating wire; heat preservation chamber (3), the heat preservation chamber (3) is fixedly installed on the circumferential surface of the heating device (2), and the top of the heat preservation chamber (3) is provided with a through hole; long rod (4), the long rod (4) slides through the top of the support frame (1), and the top of the long rod (4) is fixedly connected to the output end of the electric push rod; hollow cylinder (5), the hollow cylinder (5) is fixedly installed at the bottom of the long rod (4); placement rack (6), the placement rack (6) Fixedly installed on the circumferential surface of the hollow cylinder (5); a ring (7), the ring (7) being fixedly installed on the surface of the placement frame (6); an elastic sheet (8), the elastic sheet (8) being disposed on the inner wall of the ring (7); an extrusion plate (9), the extrusion plate (9) being fixedly installed on the surface of the elastic sheet (8); a movable plate (10) slidingly passes through the interior of the hollow cylinder (5), a first spring (11) being disposed between the movable plate (10) and the hollow cylinder (5), and a sealing plate (12) being fixedly installed on the surface of the movable plate (10); wherein, the support frame (1) is provided with A protective device for cooling the sensor is provided, and the protective device is equipped with an alarm device to improve cooling safety; the protective device includes a connecting rod (131), a cylinder (132), a contact frame (133), a Y-shaped plate (134), a cylindrical rod (135), a protective plate (136), and an outer frame (137). The connecting rod (131) slides through the inner and outer walls of the support frame (1). One end of the connecting rod (131) is fixedly connected to the moving end of the linear drive device, and the cylinder (132) is fixedly installed on the other end of the connecting rod (131). The frame (133) slides through the top of the cylinder (132), the Y-shaped plate (134) is fixedly installed on the top of the contact frame (133), the cylindrical rod (135) is fixedly installed on the bottom of the Y-shaped plate (134), the protective plate (136) is fixedly installed on the bottom of the cylindrical rod (135), the outer frame (137) is fixedly installed on the circumferential surface of the cylinder (132), and a breathable plate is provided on the circumferential surface of the cylinder (132); the bottom of the cylinder (132) contacts the top of the heat preservation chamber (3), and the protective plate (136) is arc-shaped;The alarm device includes a buzzer (141), a button (142), a rectangular frame (143), a rectangular plate (144), a rotating rod (145), and an L-shaped plate (146). The buzzer (141) is fixedly installed on the top of the cylinder (132), the button (142) is located at the bottom of the buzzer (141), the rectangular frame (143) is fixedly installed at the bottom of the buzzer (141), the rectangular plate (144) is slidably installed inside the rectangular frame (143), the rotating rod (145) rotates through the inner and outer walls of the rectangular plate (144), the L-shaped plate (146) is fixedly installed on the surface of the rotating rod (145), and a through groove is provided on the outer wall of the rectangular frame (143). The rotating rod (145) contacts the inner wall of the through groove, and a spiral spring is provided between the rotating rod (145) and the rectangular plate (144); a slide block (147) is fixedly installed on the surface of the rectangular frame (143), and a convex rod (148) is slidably installed inside the slide block (147), and a limit plate (149) is fixedly installed on the circumferential surface of the convex rod (148); the circumferential surface of the hollow cylinder (5) is in contact with the inner wall of the through hole of the heat preservation chamber (3), and the sealing plate (12) contacts the top of the heat preservation chamber (3); the protective plate (136) contacts the circumferential surface of the cylinder (132), and a sliding groove is provided on the outer frame (137), and the protective plate (136) contacts the inner wall of the sliding groove.

2. A method of using a sensor durability testing device, comprising using the sensor durability testing device according to claim 1, characterized in that, Includes the following steps: Step 1: Start the heating device (2), the insulation wire on the heating device (2) begins to heat up, and the insulation wire increases the temperature inside the insulation chamber (3); Step 2: The output end of the electric push rod drives the long rod (4) to move upward. The movement of the long rod (4) drives the hollow cylinder (5) to move upward. The movement of the hollow cylinder (5) drives the placement rack (6) to move upward out of the insulation chamber (3). Step 3: Place the sensor to be tested into the placement rack (6) from top to bottom. After placement, the output end of the electric push rod drives the long rod (4) to move down to the starting position. Step 4: After the placement rack (6) is moved to the starting position, the high-temperature gas in the heat preservation chamber (3) comes into contact with the sensor to conduct a high-temperature durability test.

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