Automatic detection device for air pressure sensor

Abstract

The utility model discloses a kind of automatic detection devices of air pressure sensor, including sensor installation cover, meteorological support and air pressure sensor, sensor installation cover is installed on meteorological support, air pressure sensor is set to inside sensor installation cover, still include a set of automatic calibration mechanism, automatic calibration mechanism includes top frame, linear drive part, moving frame, micro air pump, data processing unit and conical air outlet, top frame is fixedly installed on the top of air pressure sensor by slide bar, linear drive part is installed on top frame, its output end is connected with moving frame, driving moving frame slides up and down along slide bar, micro air pump and conical air outlet are installed on moving frame, the utility model in use process, by linear drive part driving micro air pump and conical air outlet sealed butt joint to air pressure sensor, output standard pressure, complete data processing and parameter correction by data processing unit, without disassembling device, eliminate remote area artificial round trip cost.

Description

Technical Field

[0001] This utility model relates to the field of meteorological detection technology, and more specifically, to an automatic detection device for a barometric pressure sensor. Background Technology

[0002] As a core detection component in meteorological observation, environmental monitoring, aerospace, and other fields, the measurement accuracy of barometric pressure sensors directly determines the reliability and application value of the relevant data. In meteorological observation scenarios, barometric pressure sensors are typically deployed outdoors on meteorological supports for extended periods. With increasing usage time, factors such as temperature fluctuations, humidity changes, dust erosion, and vibration interference from the external environment can cause the sensor's detection accuracy to gradually drift. If calibration is not performed in a timely manner, it will lead to distortion of meteorological data, affecting the accuracy of weather forecasts and the timeliness of disaster warnings.

[0003] Currently, the calibration of barometric pressure sensors mainly adopts an offline manual calibration method. This method requires manually disassembling the sensor, transporting it to a professional laboratory, using precision calibration equipment to complete the testing and parameter correction, and then reinstalling it back in the field after calibration. This method has many significant drawbacks: The calibration process is cumbersome, time-consuming, and labor-intensive. Especially for remote areas or large-scale sensor networks, the cost of manual round trips is extremely high, resulting in calibration cycles that generally last for weeks or even months. This makes it difficult to meet the high-frequency calibration requirements of sensors. During offline calibration, sensors need to stop working for a long time, causing interruptions in observation data, creating data blind spots, and affecting the continuity of observation data.

[0004] Therefore, we propose a barometric pressure sensor detection device that can achieve automatic on-site calibration to solve the above problems. Utility Model Content

[0005] To achieve the above objectives, this utility model provides the following technical solution: An automatic detection device for a barometric pressure sensor includes a sensor mounting cover, a meteorological support, and a barometric pressure sensor. The sensor mounting cover is mounted on the meteorological support, and the barometric pressure sensor is disposed inside the sensor mounting cover. It also includes an automatic calibration mechanism, which comprises a top frame, a linear drive, a moving frame, a micro air pump, a data processing unit, and a conical air outlet; The top frame is fixedly mounted on top of the pressure sensor via a slide bar; The linear drive is mounted on the top frame, and its output end is connected to the movable frame, driving the movable frame to slide up and down along the slide bar; The miniature air pump and the conical air outlet are mounted on the mobile frame, and the conical air outlet is connected to the output end of the miniature air pump; The data processing unit is electrically connected to the pressure sensor, linear actuator, and miniature air pump to control the calibration process and process the test data. When the linear drive extends, it can stably drive the moving frame to move vertically downward along the slide bar, ensuring that the conical air outlet and the detection end of the air pressure sensor form a tight seal.

[0006] Furthermore, the miniature air pump is fixedly installed at the top center of the mobile frame, and the conical air outlet is fixedly installed at the bottom center of the mobile frame, and is connected to the output end of the miniature air pump through an internal air passage.

[0007] Furthermore, the linear drive unit consists of two sets, symmetrically installed on both sides of the bottom of the top frame, with its output end fixedly connected to the top of the moving frame.

[0008] Furthermore, a sealing gasket is bonded and fixed around the detection end of the air pressure sensor, and the sealing gasket is made of nitrile rubber.

[0009] Furthermore, the bottom of the conical air outlet is provided with an annular groove that matches the sealing gasket, so that an air seal is formed when the conical air outlet comes into contact with the detection end.

[0010] Furthermore, sliding sleeves are provided at the four corners of the mobile frame, and the sliding sleeves slide in conjunction with the sliding rods to ensure that the mobile frame can be raised and lowered smoothly.

[0011] Furthermore, the sliding sleeve is made of polytetrafluoroethylene material, and the inner wall of the sliding sleeve is provided with a lubricating coating.

[0012] Furthermore, the weather support is equipped with photovoltaic panels and batteries.

[0013] Furthermore, the input end of the miniature air pump is connected to an air filter via a pipe.

[0014] In summary, this utility model has the following beneficial technical effects: During use, this invention uses a linear drive to drive a miniature air pump to seal and connect with a conical air outlet to the pressure sensor, outputting standard pressure. The data processing unit then completes data processing and parameter correction. This eliminates the need for disassembly and manual intervention, reducing the cost of manual travel to remote areas, meeting high-frequency calibration requirements, significantly reducing labor and management costs, and adapting to widely distributed meteorological observation scenarios. Furthermore, it prevents continuous interruption of the pressure sensor's operation during testing, shortening calibration time and avoiding observation interruptions and data blind spots caused by traditional offline calibration. This ensures continuous and complete meteorological data, providing reliable support for weather forecasting and disaster early warning. Attached Figure Description

[0015] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts.

[0016] in: Figure 1 This is a three-dimensional schematic diagram of the present invention; Figure 2 This is a schematic diagram of the sensor mounting cover of this utility model; Figure 3 This is a schematic diagram of the internal air pressure sensor structure of the sensor mounting cover of this utility model; Figure 4 This is a schematic diagram of the structure of the air pressure sensor of this utility model; Figure 5 This is a schematic diagram of the exploded structure of the pressure sensor of this utility model; Figure 6 This is a schematic diagram of the explosion structure of the pressure sensor of this utility model from another perspective.

[0017] Figures 1-6 Explanation of reference numerals in the attached drawings: 1. Sensor mounting cover; 2. Weather support; 3. Barometric pressure sensor; 301. Top frame; 302. Linear drive component; 303. Moving frame; 304. Miniature air pump; 305. Data processing unit; 306. Conical air outlet. Detailed Implementation

[0018] Based on the technical solution of this utility model, without changing the essential spirit of this utility model, those skilled in the art can propose various interchangeable structural methods and implementation methods. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model, and should not be regarded as the entirety of this utility model or as a limitation or restriction of the technical solution of this utility model.

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments: like Figures 1 to 6 As shown, an automatic detection device for a barometric pressure sensor is described. The core of the device consists of a sensor mounting cover 1, a meteorological support 2, a barometric pressure sensor 3, and an automatic calibration mechanism. The components are mechanically fixed and connected to the circuit to form a collaborative working system. This system enables the barometric pressure sensor 3 to operate intelligently throughout the entire process from routine detection to automatic calibration, meeting the high-frequency and high-precision calibration requirements of sensors in outdoor meteorological observation scenarios and significantly reducing manual maintenance costs.

[0020] The barometric pressure sensor 3, as the core detection component, is used to collect environmental barometric pressure data in real time. Its accuracy directly determines the reliability of meteorological observation results. The sensor mounting cover 1 and the meteorological support 2 constitute the load-bearing protection system of the device, providing a stable installation foundation and outdoor protection for the internal components. The automatic calibration mechanism is the core innovation of this device, including the top frame 301, linear drive 302, moving frame 303, micro air pump 304, data processing unit 305, and conical air outlet 306. It can automatically complete the start-up, execution, and data closed-loop processing of the calibration process.

[0021] The meteorological support 2 serves as the foundation for the entire device, providing installation locations for various electrical equipment. The sensor mounting cover 1 is made of PVC material and has a cylindrical structure with good weather resistance and insulation. A ventilation opening is opened at the center of the top of the sensor mounting cover 1 to ensure air pressure circulation. The air pressure sensor 3 is a high-precision sensor selected from existing technologies. The automatic calibration mechanism is integrated with the top of the air pressure sensor 3 via a slide bar. The top frame 301 serves as the fixed frame of the calibration mechanism and is fixedly installed with four sets of slide bars. The slide bars provide precise guidance for the moving frame 303.

[0022] The linear drive component 302 uses a small electric telescopic rod from the existing technology, which needs to be small in size and have stable thrust. Two sets of telescopic rods are symmetrically installed on both sides of the bottom of the top frame 301. The output end of the telescopic rod is connected to both sides of the top of the moving frame 303 to ensure that the moving frame 303 is subjected to balanced force. Sliding sleeves are embedded at the four corners of the moving frame 303 so that the moving frame 303 can be smoothly raised and lowered along the sliding rod without jamming.

[0023] The miniature air pump 304 adopts a miniature programmable precision air pump with an adjustable pressure output range. It is fixed at the top center of the movable frame 303. The movable frame 303 has a mounting hole at the bottom center. The conical air outlet 306 is fixed to the mounting hole. The air outlet is integrally molded with silicone material and has a conical guide structure at the bottom. A rubber sealing gasket is pasted on the top of the detection end of the air pressure sensor 3 to ensure a reliable air seal when in contact.

[0024] The data processing unit 305 is fixed to the top of the top frame 301. The unit is based on a microcontroller and integrates a high-precision data acquisition module, an SD card storage module, a GPRS communication module, and a relay drive module. The data acquisition module is connected to the interface of the barometric pressure sensor 3 through a shielded cable. The output end of the drive module is electrically connected to the control ends of the linear drive 302, the micro air pump 304, and the drain valve, forming a complete control and data acquisition loop. The input end of the micro air pump 304 is connected to an air filter device through a pipe. The air filter device adopts existing technology to filter dust and ensure the service life of the micro air pump 304. The power supply system of the device uses a solar panel and a lithium battery pack. The solar panel and the lithium battery pack are installed on the meteorological support 2 through a bracket to realize the storage and stable output of electrical energy.

[0025] The working principle of this utility model: After installation and commissioning, the device can automatically enter normal working state without manual intervention. The entire operation process is divided into a normal detection mode and an automatic calibration mode. The two modes are seamlessly switched through the data processing unit 305. The specific workflow is as follows: Before starting the device, set the calibration cycle to 15 days, the standard pressure calibration sequence to 50 kPa, 60 kPa, 70 kPa, 80 kPa, 90 kPa, 100 kPa, and 110 kPa, with a stabilization time of 5 seconds for each pressure point and a data upload interval of 10 minutes. At the same time, configure the GPRS communication parameters. After the parameters are configured, they are automatically stored to the SD card, and the device will operate autonomously according to the preset parameters.

[0026] In the normal detection mode, the linear drive 302 is in a retracted state, the moving frame 303 is stationary on the upper part of the slide bar 307, and the conical air outlet 306 maintains a distance from the detection end of the air pressure sensor 3, so as not to affect the normal data acquisition of the sensor. The air pressure sensor 3 collects the ambient air pressure signal in real time and transmits it to the acquisition module of the data processing unit 305. After being processed by the microcontroller such as filtering and temperature compensation, the data is stored on the SD card to form a local data backup, and uploaded to the remote meteorological monitoring platform through the GPRS module to realize real-time monitoring of the data.

[0027] When the preset calibration cycle is reached or a manual calibration command is sent from a remote platform, the device automatically switches to calibration mode: The first step is calibration preparation: The data processing unit 305 first pauses data upload and records the current detection data as the reference before calibration; then it sends an extension command to the linear drive 302, the telescopic rod extends downward, and drives the moving frame 303 to move smoothly down along the slide bar until the telescopic rod reaches its maximum stroke. At this time, the conical air outlet 306 is completely in contact with the detection end of the air pressure sensor 3, forming a sealed pressure calibration space.

[0028] The second step is pressure calibration: the data processing unit 305 sends a start command to the micro air pump 304. The air pump gradually adjusts the output pressure according to the preset standard pressure sequence. After each pressure point is stable for 5 seconds, the data acquisition module synchronously acquires the output signal of the air pressure sensor 3, converts the analog signal into a digital pressure value and transmits it to the microcontroller. The microcontroller compares the acquired sensor detection value with the standard pressure value one by one and generates the corresponding compensation parameters.

[0029] The third step, calibration completion and reset: After the compensation parameters are calculated, the data processing unit 305 writes the parameters into the internal register of the barometric pressure sensor 3 to complete the accuracy correction. Then, it controls the micro air pump 304 to depressurize and sends a contraction command to the linear drive 302, which drives the moving frame 303 to reset. Finally, it records the calibration time, compensation parameters, and errors before and after calibration, and uploads the information to the platform via the GPRS module and stores it on the SD card. The device automatically switches back to the normal detection mode to complete the entire calibration process.

[0030] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. An automatic detection device for a barometric pressure sensor, comprising a sensor mounting cover (1), a meteorological support (2), and a barometric pressure sensor (3), wherein the sensor mounting cover (1) is mounted on the meteorological support (2), and the barometric pressure sensor (3) is disposed inside the sensor mounting cover (1), characterized in that: It also includes an automatic calibration mechanism, which includes a top frame (301), a linear drive (302), a moving frame (303), a micro air pump (304), a data processing unit (305), and a conical air outlet (306). The top frame (301) is fixedly installed on the top of the pressure sensor (3) by a slide rod; The linear drive (302) is mounted on the top frame (301), and its output end is connected to the movable frame (303), driving the movable frame (303) to slide up and down along the slide bar; The micro air pump (304) and the conical air outlet (306) are mounted on the movable frame (303), and the conical air outlet (306) is connected to the output end of the micro air pump (304); The data processing unit (305) is electrically connected to the pressure sensor (3), the linear drive (302), and the micro air pump (304) to control the calibration process and process the detection data; When the linear drive (302) extends, it can stably drive the moving frame to move vertically downward along the slide bar, ensuring that the conical air outlet and the detection end of the air pressure sensor form a tight seal.

2. The automatic detection device for a barometric pressure sensor according to claim 1, characterized in that: The micro air pump (304) is fixedly installed at the top center of the mobile frame (303), and the conical air outlet (306) is fixedly installed at the bottom center of the mobile frame (303) and is connected to the output end of the micro air pump (304) through an internal air passage.

3. The automatic detection device for a barometric pressure sensor according to claim 1, characterized in that: The linear drive unit (302) consists of two sets, symmetrically installed on both sides of the bottom of the top frame (301), and its output end is fixedly connected to the top of the movable frame (303).

4. The automatic detection device for a barometric pressure sensor according to claim 1, characterized in that: The detection end of the pressure sensor (3) is surrounded by a sealing gasket, which is made of nitrile rubber.

5. The automatic detection device for a barometric pressure sensor according to claim 1, characterized in that: The bottom of the conical air outlet (306) is provided with an annular groove that matches the sealing gasket. When the conical air outlet (306) comes into contact with the detection end, an air seal is formed.

6. The automatic detection device for a barometric pressure sensor according to claim 1, characterized in that: The four corners of the movable frame (303) are provided with sliding sleeves, which slide in cooperation with the sliding rod to ensure that the movable frame (303) rises and falls smoothly.

7. The automatic detection device for a barometric pressure sensor according to claim 6, characterized in that: The sliding sleeve is made of polytetrafluoroethylene material, and the inner wall of the sliding sleeve is provided with a lubricating coating.

8. The automatic detection device for a barometric pressure sensor according to claim 1, characterized in that: The meteorological support (2) is equipped with photovoltaic panels and storage batteries.

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