A sensor aging device

Abstract

The utility model belongs to the technical field of aging test, specifically disclose a kind of sensor aging device, comprising: aging cabinet and install in aging cabinet aging box subassembly and detection component, detection component is set in the below of aging box subassembly;Aging box subassembly includes aging seat, nozzle and sealing assembly, aging seat is equipped with the air inlet, backflow suppression cavity, aging cavity and gas outlet of intercommunication, nozzle passes through aging cabinet and is installed in air inlet, sealing assembly seals aging cavity, and can be detachably installed in aging seat, the sensor of aging installation in aging cavity.The utility model makes the airflow that flows into aging area steady, guarantees the consistency and stability of each sensor aging effect.

Description

Technical Field

[0001] This utility model belongs to the field of aging test technology, specifically relating to a sensor aging device. Background Technology

[0002] After the sensors are manufactured, they need to undergo batch aging tests using a sensor aging device. This test simulates the sensor under specific environmental conditions or with specific stimuli, such as high temperature, high humidity, and gas exposure, to accelerate the stabilization process of the sensor's performance in a short period of time, evaluate its performance degradation, lifespan, and stability, thereby ensuring the quality of the sensor.

[0003] In existing technologies, aging devices typically consist of an aging chamber, an environmental simulation control module, and a data detection and feedback module. Specifically, the environmental simulation control module includes subsystems such as an aging chamber, a heating / cooling system, a humidification / dehumidification system, a gas atmosphere control system, and temperature and humidity sensors. The data detection and feedback module mainly consists of hardware circuits such as data acquisition circuits and control circuits, as well as control software. Existing gas sensor aging devices primarily use static, constant concentration aging, but possess the ability to dynamically adjust gas concentration and type, simulating sudden leaks, intermittent exposures, and alternating impacts in various real-world scenarios such as contraband detection, industrial process monitoring, vehicle-mounted sensing, and smart wearables. However, regarding the gas atmosphere control system, current methods mostly rely solely on devices such as a mass flow controller and a gas mixing device at the front end of the aging chamber to ensure the concentration and flow rate of the aging gas entering the chamber. For example, Chinese utility model patent CN205786426U, authorized on 2016-12-07, specifically discloses an aging device for a semiconductor gas sensor that controls gas flow by adjusting a damping tube. However, when the sensors are subjected to batch aging, this configuration cannot guarantee the uniformity of concentration and the stability of velocity of the aging gas flowing through each sensor in dynamic mode, which has an adverse effect on the stability and consistency of the batch aging effect of the sensors. Utility Model Content

[0004] The purpose of this invention is to provide a sensor aging device that controls the airflow into the aging area to be stable, thereby ensuring the consistency and stability of the aging effect of a batch of sensors.

[0005] The purpose of this utility model is achieved through the following technical solution: a sensor aging device is provided, comprising an aging chamber and an aging box assembly and a detection assembly installed in the aging chamber, wherein the detection assembly is located below the aging box assembly; the aging box assembly includes an aging seat, a nozzle and a sealing assembly, wherein the aging seat is provided with an air inlet, a backflow suppression chamber, an aging chamber and an air outlet that are interconnected, the nozzle passes through the aging box and is installed in the air inlet, the sealing assembly seals the aging chamber and is detachably installed on the aging seat, and the sensor to be aged is installed in the aging chamber.

[0006] Preferably, the backflow suppression cavity is composed of an inclined top surface, a flat top surface, an inclined bottom surface, a flat bottom surface, and an inner wall of the side wall. The angle between the inclined top surface and the flat top surface is ∠2, and the angle range of ∠2 is 95°-140°. The angle between the inclined bottom surface and the flat bottom surface is ∠1, and the angle range of ∠1 is 90°-140°.

[0007] Preferably, the height of the aging chamber is h, and the range of h is 5mm-15mm.

[0008] Preferably, the sealing assembly includes a mounting flange, a gasket, and a cover plate. The top surface is hollowed out in the middle to expose the aging chamber. The mounting flange is arranged circumferentially around the top surface, the cover plate covers the mounting flange, and the gasket is installed between the cover plate and the mounting flange.

[0009] Preferably, the bottom surface of the aging seat is provided with several sensor mounting through holes, and the sensor to be aged is embedded in the sensor mounting through holes.

[0010] Preferably, the horizontal cross-section of the nozzle is trapezoidal, and the size gradually increases from the nozzle inlet to the air inlet.

[0011] Preferably, the aging chamber assembly further includes a heating element, which is mounted on the outside of the aging chamber.

[0012] Preferably, it also includes a temperature and humidity sensor, which is installed on the aging mount.

[0013] Preferably, the inner wall of the bottom surface of the aging chamber is provided with a plurality of first mounting posts, and the aging box assembly is provided with a third mounting ear. The aging box assembly is mounted to the first mounting posts by bolts passing through the third mounting ear.

[0014] Due to the adoption of the above technical solution, this utility model has the following advantages:

[0015] An aging chamber assembly is installed in the aging chamber. The aging chamber assembly has a connected backflow suppression chamber and an aging chamber. The backflow suppression chamber effectively suppresses gas backflow in this area, making the gas flowing into the aging chamber stable, thereby ensuring the consistency and stability of the aging effect of each sensor. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0017] Figure 1 This is a schematic diagram of the structure of a sensor aging device according to the present invention;

[0018] Figure 2 This is a schematic diagram of the overall sensor aging device.

[0019] Figure 3 This is a schematic diagram of the aging support structure;

[0020] Figure 4 This is a schematic diagram of the reflux suppression chamber and the aging chamber;

[0021] Figure 5 This is a schematic diagram illustrating the simulation effect of the flow field inside the aging cavity;

[0022] Figure 6 A schematic diagram of the simulation effect of the flow field inside the aging cavity with ∠1=80°, ∠2=120°, and h=10mm;

[0023] Figure 7 A schematic diagram of the simulation effect of the flow field inside the aging cavity with ∠1=95°, ∠2=120°, and h=10mm;

[0024] Figure 8 A schematic diagram of the simulation effect of the flow field inside the aging cavity with ∠1=120°, ∠2=120°, and h=10mm;

[0025] Figure 9 A schematic diagram of the simulation effect of the flow field inside the aging cavity with ∠1=135°, ∠2=120°, and h=10mm;

[0026] Figure 10 A schematic diagram of the simulation effect of the flow field inside the aging cavity with ∠1=140°, ∠2=120°, and h=10mm;

[0027] Figure 11 A schematic diagram of the simulation effect of the flow field inside the aging cavity with ∠1=95°, ∠2=90°, and h=10mm;

[0028] Figure 12 A schematic diagram of the simulation effect of the flow field inside the aging cavity with ∠1=95°, ∠2=95°, and h=10mm;

[0029] Figure 13 A schematic diagram of the simulation effect of the flow field inside the aging cavity with ∠1=95°, ∠2=120°, and h=10mm;

[0030] Figure 14A schematic diagram of the simulation effect of the flow field inside the aging cavity with ∠1=95°, ∠2=140°, and h=10mm;

[0031] Figure 15 A schematic diagram of the simulation effect of the flow field inside the aging cavity with ∠1=95°, ∠2=120°, and h=5mm;

[0032] Figure 16 The diagram shows the simulation effect of the flow field inside the aging cavity with ∠1 = 95°, ∠2 = 120°, and h = 15mm.

[0033] Figure label:

[0034] 1-Aging chamber, 11-Cavity, 12-Case cover, 121-Exhaust port, 122-Second mounting ear, 13-First mounting ear, 14-First mounting post; 15-Threaded hole, 16-Cable hole;

[0035] 2-Aging box assembly, 21-Aging seat, 211-Air inlet, 212-Backflow suppression chamber, 213-Aging chamber, 214-Air outlet, 215-Sensor mounting through hole, 216-Sloped top surface, 217-Flat top surface, 218-Sloped bottom surface, 219-Flat bottom surface, 22-Nozzle, 23-Sealing assembly, 231-Mounting flange, 232-Sealing gasket, 233-Cover plate, 24-Socket guide, 25-Heating element, 26-Third mounting ear;

[0036] 3-Detection component, 31-Support plate, 32-Control module, 33-Data detection and feedback module, 34-Sensor socket;

[0037] 4-Temperature and humidity sensor. Detailed Implementation

[0038] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0039] Please see Figures 1 to 3A sensor aging device includes an aging chamber 1, an aging box assembly 2, and a detection assembly 3 installed in the aging chamber 1. The detection assembly 3 is located below the aging box assembly 2. The aging box assembly 2 includes an aging seat 21, a nozzle 22, and a sealing assembly 23. The aging seat 21 has an air inlet 211, a backflow suppression chamber 212, an aging chamber 213, and an air outlet 214 that are interconnected. The nozzle 22 passes through the aging box 1 and is installed in the air inlet 211. The sealing assembly 23 seals the aging chamber 213 and is detachably installed in the aging seat 21. The sensor to be aged is installed in the aging chamber 213. Specifically, the aging chamber 1 has a cavity 11 inside, and the aging box assembly 2 and the detection assembly 3 are installed in the cavity 11. The aging chamber 21 is hollow and includes a backflow suppression chamber 212 and an aging chamber 213 that are connected. The air inlet 211 is connected to the front end of the backflow suppression chamber 212. One end of the aging chamber 213 is connected to the air outlet 214, and the other end is connected to the backflow suppression chamber 212. The detection component 3 is installed below the aging chamber 213 to monitor the sensors one by one. The aging chamber 1 is provided with a cover 12 that covers it. The cover 12 is provided with an exhaust port 121 that cooperates with the air outlet 214. The top four corners of the aging chamber 1 are welded with first mounting ears 13, and the cover 12 is provided with second mounting ears 122 respectively. Bolts pass through the first mounting ears 13 and the second mounting ears 122, and nuts are used to install the cover 12 onto the aging chamber 1. If the cover 12 needs to be removed, the nuts can be unscrewed. The exhaust port 121 is located directly above the air outlet 214 and has both gas emission and heat dissipation functions. Using existing technology, the front end of nozzle 22 can be connected to a mass flow controller and a humidifier to adjust the flow rate and humidity of the aging gas introduced into the aging chamber assembly 2. Nozzle 22 is connected to an external gas source, which provides the gas required for aging.

[0040] In this invention, a sensor aging device is used by first opening the cover 12 and removing the corresponding parts of the sealing component 23 of the sealing aging chamber 213. Then, the sensors to be aged are placed one by one into the aging chamber 213. The monitoring status of the sensor by the detection component 3 is checked. After confirmation, the sealing component 23 is installed to seal the aging chamber 213, and then the cover 12 is reassembled. Finally, the external air source is turned on, and the external mass flow controller and humidifier are turned on according to the actual application scenario. The gas enters the backflow suppression chamber 212 through the nozzle 22. The backflow suppression chamber 212 effectively suppresses the backflow of gas in this area, making the gas flowing into the aging chamber 213 stable, thereby ensuring the consistency and stability of the sensor aging effect.

[0041] Further, please refer to Figure 3 and Figure 4The backflow suppression cavity 212 is composed of an inclined top surface 216, a flat top surface 217, an inclined bottom surface 218, a flat bottom surface 219, and an inner wall. The angle between the inclined top surface 216 and the flat top surface 217 is ∠2, with an angle range of 95°-140°; the angle between the inclined bottom surface 218 and the flat bottom surface 219 is ∠1, with an angle range of 90°-140°. Specifically, as... Figures 6 to 14 Simulation results show that increasing ∠2 has a positive impact on improving flow field stability. When ∠2 is less than 95°, the return flow rate of aging chamber 213 increases significantly. However, when ∠2 is greater than 140°, the volume of aging seat 21 increases significantly. Given a fixed length of aging chamber 1, the length of aging chamber 213 can only be reduced. Considering the small number of batch aging sensors, ∠2 is controlled within the range of 95°-140°. The influence of ∠1 on the flow field is related to ∠2. When ∠2 is fixed, for example, ∠2 is 120°, the return flow rate at the inlet of aging chamber 213 begins to increase significantly after ∠1 is greater than 140°. If ∠1 is less than 90°, it will significantly increase the volume of aging seat 21 and the complexity of subsequent assembly. Therefore, ∠1 can be controlled between 90° and 140°, and this angle can be adjusted appropriately according to the angle of ∠2. Preferably, ∠2 is 120° and ∠1 is 95°, so that the aging chamber 213 has a low reflux rate and can accommodate the number of aging sensors.

[0042] Further, please refer to Figure 4 The height of the aging chamber 213 is h, which ranges from 5mm to 15mm. Specifically, the aging chamber 213 is composed of the inner walls and side walls of the flat top surface 217 and the flat bottom surface 219, and the distance between the inner walls of the flat top surface 217 and the flat bottom surface 219 is h. Figure 13 , Figure 15 and Figure 16 Simulation results show that when h>15mm, the return flow rate begins to increase, which makes the flow field stability worse. When h is less than 5mm, the aging chamber 213 is difficult to process. Considering all factors, h should be controlled within the range of 5mm-15mm. This size can be adjusted appropriately according to the width of the aging chamber 213.

[0043] Furthermore, the sealing assembly 23 includes a mounting flange 231, a sealing gasket 232, and a cover plate 233. The flat top surface 217 has a hollow center, exposing the aging chamber 213. The mounting flange 231 is arranged circumferentially around the flat top surface 217, the cover plate 233 covers the mounting flange 231, and the sealing gasket 232 is installed between the cover plate 233 and the mounting flange 231. Specifically, the hollow center of the flat top surface 217 exposes the aging chamber 213 to facilitate the placement or removal of the sensor from the sensor mounting through hole 215. The mounting flange 231 is integrally formed and pre-installed on the flat top surface 217 with screws. The mounting flange 231, sealing gasket 232, and cover plate 233 have coaxial mounting holes, allowing for detachable installation using hexagonal screws. To remove the cover plate 233, simply unscrew the hexagonal screws. This structure facilitates the placement or removal of the sensor; when the sealing component 23 seals the aging chamber 213, it ensures the airtightness of the aging chamber 213 area and improves the flow field stability of the aging chamber 213.

[0044] Further, please refer to Figures 1 to 3 The aging holder 21 has several sensor mounting through holes 215 on its bottom surface, into which the sensors to be aged are embedded. Specifically, the sensor mounting through holes 215 are arranged in a rectangular pattern in the flat bottom surface 219, allowing for batch aging of sensors. To ensure the sensor body is embedded in the sensor mounting through holes 215, the thickness of the bottom surface of the aging holder 21 matches the height of the sensor. This structure effectively reduces the resistance of the sensor body to the fluid and effectively improves the stability of the flow field.

[0045] Further, please refer to Figure 1 The detection component 3 includes a support plate 31, a control module 32, a data detection and feedback module 33, and a sensor socket 34. The sensor socket 34 is mounted on the data detection and feedback module 33, which is electrically connected to the control module 32. The control module 32 is mounted on the support plate 31, which is installed in the aging chamber 1. Specifically, the support plate 31 is an insulating plastic plate. The bottom inner wall of the aging chamber 1 has several threaded holes 15. The support plate 31 is detachably installed in the aging chamber 1 by threading it to the threaded holes 15 with flat-head screws. Each sensor mounting through hole 215 has a socket guide 24 at the bottom that mates with the sensor socket 34, and the sensor is inserted into the sensor socket 34. The side surface of the aging chamber 1 has multiple cable holes 16 for cables to pass through the aging chamber 1. The cables are used to connect the detection component 3 to an external power source. In application, this aging device can be adapted to different types of sensors by replacing the detection component 3, including but not limited to gas sensors such as semiconductor gas sensors, solid electrolyte gas sensors, electrochemical gas sensors, and optical gas sensors, or flow sensors, environmental sensors, etc.

[0046] Further, please refer to Figure 2 and Figure 3 The horizontal cross-section of nozzle 22 is trapezoidal, and its size gradually increases from the nozzle inlet to the air inlet 211. Nozzle 22 adopts a flared type. After gas is introduced into nozzle 22, the volume of the cavity increases, increasing the air inlet area and reducing the gas flow rate. After the gas is initially buffered, it enters the backflow suppression chamber 212. Nozzle 22 is exposed on the outside of aging chamber 1.

[0047] Further, please refer to Figure 1 The aging chamber assembly 2 also includes a heating element 25, which is installed on the outside of the aging chamber 21. Specifically, the heating element 25 is an electric heating element. Preferably, the shape of the heating element 25 is similar to that of the aging chamber 21, and there are two sets of them, which are respectively installed on the two outer sides of the aging chamber 21 to adjust the temperature of the backflow suppression chamber 212 and the aging chamber 213 to simulate the ambient temperature variable.

[0048] Further, please refer to Figure 1 and Figure 2 It also includes a temperature and humidity sensor 4, which is installed on the aging base 21. Specifically, in order to monitor the humidity of the aging gas entering and the temperature of the gas in the backflow suppression chamber 212, and to better simulate the sensor aging scenario, a through-temperature and humidity sensor interface 41 is provided above the backflow suppression chamber 212, and the temperature and humidity sensor 4 is installed in the temperature and humidity sensor interface 41.

[0049] Further, please refer to Figure 1 The aging chamber 1 has several first mounting posts 14 on its bottom inner wall, and the aging box assembly 2 has third mounting ears 26. The aging box assembly 2 is mounted to the first mounting posts 14 by bolts passing through the third mounting ears 26. Specifically, the first mounting posts 14 have internal threaded holes, and the flat bottom surface 219 has third mounting ears 26. The aging box assembly 2 is installed in the aging chamber 1 by screws. This structure facilitates the installation of the detection assembly 3 in the space formed by the first mounting posts 14.

[0050] This invention discloses a sensor aging device that integrates the environmental simulation, data acquisition, and control functions of a traditional aging chamber. The nozzle 22 is flared to increase the air intake width, allowing the gas to undergo initial buffering before entering the backflow suppression chamber 212. The backflow suppression chamber 212 controls the angles ∠1 and ∠2 to effectively suppress backflow in this area, reducing the backflow rate in the aging chamber 213 region. The height of the aging chamber 213 is minimized to increase the stability of the airflow through it. The sensor body is embedded in the bottom of the aging chamber 213, effectively reducing the resistance of the sensor body to the fluid and improving flow field stability. This facilitates sensor placement and removal. The sealing assembly 23 ensures the airtightness of the aging chamber 213 region when sealing it, further improving the flow field stability. The heating element 25 and the temperature and humidity sensor 4 enhance the sensor's application in the aging environment.

[0051] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific implementation method of this utility model and is not intended to limit this utility model. Any modifications, equivalent substitutions, and improvements made within the scope of the spirit of this utility model should be included within the protection scope of this utility model.

Claims

1. A sensor aging apparatus, characterized by, include: An aging chamber (1) and an aging box assembly (2) and a detection assembly (3) installed in the aging chamber (1). The detection assembly (3) is located below the aging box assembly (2). The aging box assembly (2) includes an aging seat (21), a nozzle (22) and a sealing assembly (23). The aging seat (21) is provided with an air inlet (211), a backflow suppression chamber (212), an aging chamber (213) and an air outlet (214) that are interconnected. The nozzle (22) passes through the aging box (1) and is installed in the air inlet (211). The sealing assembly (23) seals the aging chamber (213) and is detachably installed in the aging seat (21). The sensor to be aged is installed in the aging chamber (213).

2. The sensor aging apparatus of claim 1, wherein The backflow suppression cavity (212) is composed of an inclined top surface (216), a flat top surface (217), an inclined bottom surface (218), a flat bottom surface (219), and an inner wall of the side wall. The angle between the inclined top surface (216) and the flat top surface (217) is ∠2, and the angle range of ∠2 is 95°-140°. The angle between the inclined bottom surface (218) and the flat bottom surface (219) is ∠1, and the angle range of ∠1 is 90°-140°.

3. The sensor burn-in apparatus of claim 2, wherein, The height of the aging chamber (213) is h, and the range of h is 5mm-15mm.

4. The sensor aging apparatus according to claim 2 or 3, characterized by, The sealing assembly (23) includes a mounting flange (231), a sealing gasket (232), and a cover plate (233). The top surface (217) is hollowed out in the middle, exposing the aging chamber (213). The mounting flange (231) is arranged around the top surface (217) in a circumferential manner. The cover plate (233) covers the mounting flange (231), and the sealing gasket (232) is installed between the cover plate (233) and the mounting flange (231).

5. The sensor aging device according to any one of claims 1 to 3, characterized in that, The bottom surface of the aging base (21) is provided with several sensor mounting through holes (215), and the sensor to be aged is embedded in the sensor mounting through holes (215).

6. The sensor burn-in apparatus of any one of claims 1-3, wherein, The horizontal cross section of the nozzle (22) is trapezoidal, and its size gradually increases from the nozzle (22) inlet to the air inlet (211).

7. The sensor burn-in apparatus of claim 5, wherein, The horizontal cross section of the nozzle (22) is trapezoidal, and its size gradually increases from the nozzle (22) inlet to the air inlet (211).

8. The sensor burn-in apparatus of claim 1, 2, 3, or 7, wherein, The aging box assembly (2) also includes a heating element (25), which is mounted on the outside of the aging base (21).

9. The sensor burn-in apparatus of claim 1, 2, 3, or 7, wherein, It also includes a temperature and humidity sensor (4), which is mounted on the aging mount (21).

10. The sensor burn-in apparatus of claim 1, 2, 3, or 7, wherein, The aging chamber (1) has several first mounting posts (14) on its bottom inner wall, and the aging box assembly (2) has a third mounting ear (26). The aging box assembly (2) is mounted on the first mounting posts (14) by bolts passing through the third mounting ear (26).

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