阅读说明：本技术 一种压力传感器可靠性测试系统 (Pressure sensor reliability test system ) 是由 艾育林 陈建华 于 2021-09-09 设计创作，主要内容包括：本发明公开了一种压力传感器可靠性测试系统,增压装置输出口连接至储气瓶,储气瓶连接有压力表Ⅰ,并通过气管连接至调压阀的输入端,调压阀的输出端通过压力表Ⅱ连接至测试箱的进气阀,测试箱内放置若干压力传感器,测试箱的卸压口之前装有卸压阀,所述进气阀、卸压阀由MCU控制开启或关闭,所述MCU还设有从每个压力传感器采集压力值数据的数据采集模块,所述MCU连接有PC上位机。本发明可快速便捷地对传感器反复加压和泄压,同时将每次的数据进行记录,为传感器生产厂家提供高不同次数施压时的输出精度及可靠度的评估依据；本发明系统取材简单,自动化程度高,灵活性强,适应各种不同压力量程传感器的工程测量及可靠性评估。(The invention discloses a pressure sensor reliability testing system, wherein an output port of a supercharging device is connected to a gas storage bottle, the gas storage bottle is connected with a pressure gauge I and is connected to an input end of a pressure regulating valve through a gas pipe, an output end of the pressure regulating valve is connected to a gas inlet valve of a testing box through a pressure gauge II, a plurality of pressure sensors are placed in the testing box, a pressure relief valve is arranged in front of a pressure relief port of the testing box, the gas inlet valve and the pressure relief valve are controlled to be opened or closed by an MCU, the MCU is also provided with a data acquisition module for acquiring pressure value data from each pressure sensor, and the MCU is connected with a PC upper computer. The invention can rapidly and conveniently repeatedly pressurize and decompress the sensor, and simultaneously record the data of each time, thereby providing the sensor manufacturer with the evaluation basis of the output precision and reliability when the pressure is applied for different times; the system has the advantages of simple material acquisition, high automation degree and strong flexibility, and is suitable for engineering measurement and reliability evaluation of various pressure range sensors.)

1. A pressure sensor reliability test system characterized in that: the device comprises a supercharging device, wherein compressed air is input from an input port of the supercharging device, an output port of the supercharging device is connected to a gas storage bottle, the gas storage bottle is connected with a pressure gauge I and is connected to the input end of a pressure regulating valve through an air pipe, the output end of the pressure regulating valve is connected to an air inlet valve of a test box through a pressure gauge II, a plurality of pressure sensors are arranged in the test box, a pressure relief valve is arranged in front of a pressure relief port of the test box, the air inlet valve and the pressure relief valve are controlled to be opened or closed by an MCU (microprogrammed control unit), the MCU is further provided with a data acquisition module for acquiring pressure value data from each pressure sensor, and the MCU is connected with a PC (personal computer) upper computer; the PC host computer gathers the pressure value of manometer I, manometer II respectively, and control supercharging device stops the pressure boost when manometer I reaches certain pressure, merges and saves the pressure value data of gathering manometer II and MCU collection pressure sensor's pressure value data.

2. The pressure sensor reliability testing system of claim 1, wherein: the MCU controls the air inlet valve and the pressure relief valve to work in a coordinated mode, controls the pressure relief valve to be closed when the air inlet valve is controlled to be opened, completes one-time pressure application in the test box, and controls the pressure relief valve to be opened when the air inlet valve is controlled to be closed, and completes one-time pressure relief.

3. The pressure sensor reliability testing system of claim 1, wherein: and the opening and closing frequencies of the air inlet valve and the pressure relief valve are set by a PC upper computer and are completed by the MCU.

4. The pressure sensor reliability testing system of claim 1, wherein: the fastest frequency of opening and closing the air inlet valve and the pressure relief valve is 2 Hz.

5. The pressure sensor reliability testing system of claim 1, wherein: the model of the core chip of the MCU is SMT32F103ZET 6.

6. The pressure sensor reliability testing system of claim 1, wherein: and the PC upper computer is provided with an MCU test period, and the MCU in the test period collects pressure value data of the pressure sensor for each pressure test to generate a text document.

Technical Field

The invention belongs to the technical field of pressure sensors, and particularly relates to a pressure sensor reliability testing system.

Background

With the rapid development of the internet of things and the rapid increase of the demand of the market on the pressure sensor, the reliability of the pressure sensor becomes a problem which needs to be solved urgently by manufacturers for the research and development of products and the verification of the reliability. Especially, the reliability of the automobile pressure sensor, the impact of which is the basis of entering the door for millions of times, the traditional method is to purchase the international brand pressure controller, the cost is high, and the use is inconvenient, so that the research and development progress of the product is delayed, and the market popularization of new products of companies is influenced.

Disclosure of Invention

The invention aims to solve the problems, and provides a pressure sensor reliability testing system which can quickly, conveniently and reliably control and record repeated pressurization and pressure relief of a sensor through software programming, acquire signal output of the sensor in real time, record data every time, provide an evaluation basis of output accuracy and reliability when the pressure is applied for different times for a sensor manufacturer, and provide a basis for improving sensor design.

The technical scheme of the invention is realized in such a way.

A pressure sensor reliability test system characterized in that: the device comprises a supercharging device, wherein compressed air is input from an input port of the supercharging device, an output port of the supercharging device is connected to a gas storage bottle, the gas storage bottle is connected with a pressure gauge I and is connected to the input end of a pressure regulating valve through an air pipe, the output end of the pressure regulating valve is connected to an air inlet valve of a test box through a pressure gauge II, a plurality of pressure sensors are arranged in the test box, a pressure relief valve is arranged in front of a pressure relief port of the test box, the air inlet valve and the pressure relief valve are controlled to be opened or closed by an MCU (microprogrammed control unit), the MCU is further provided with a data acquisition module for acquiring pressure value data from each pressure sensor, and the MCU is connected with a PC (personal computer) upper computer; the PC host computer gathers the pressure value of manometer I, manometer II respectively, and control supercharging device stops the pressure boost when manometer I reaches certain pressure, merges and saves the pressure value data of gathering manometer II and MCU collection pressure sensor's pressure value data.

Further, the MCU controls the air inlet valve and the pressure relief valve to work in a coordinated mode, the pressure relief valve is controlled to be closed when the air inlet valve is controlled to be opened, pressure is applied to the test box for one time, and the pressure relief valve is controlled to be opened when the air inlet valve is controlled to be closed, so that pressure relief is completed for one time.

Further, the opening and closing frequency of the air inlet valve and the pressure relief valve is set by a PC upper computer and is completed by the MCU.

Further, the fastest frequency of opening and closing of the air inlet valve and the pressure relief valve is 2 Hz.

Further, the core chip model of the MCU is SMT32F103ZET 6.

Furthermore, an MCU test period is set on the PC upper computer, pressure value data of the pressure sensor for each pressure application test collected by the MCU in the test period is generated into a text document, and output changes of the pressure sensor for different times of pressure application can be consulted and evaluated to serve as a basis for engineering analysis and judgment.

The technical principle of the invention is as follows: the pneumatic control system is realized by integrating industrial control, a pneumatic principle, lower computer software and upper computer software. The method is characterized in that compressed air of a factory air source is used as a power source (the pressure is 4-7Kg generally) of a supercharging device, the power source passes through a pneumatic supercharging pump (the supercharging device) with the pressure of 0.1-60 times, the pressure is increased to a corresponding required pressure value and stored in an air storage bottle, the air storage bottle is provided with a digital pressure gauge, a pressure value signal of the digital pressure gauge is monitored by computer software of a PC (personal computer) host computer and fed back to a control valve of the supercharging device, when the target pressure is reached, the control valve of the supercharging device automatically adjusts the supercharging multiple to reach stable and safe pressure, and the pressure of the air storage bottle is ensured to be the required pressure value. The rear end of the gas bomb is provided with a pressure regulating valve, a pressure monitoring meter after pressure regulation is arranged behind the gas bomb, the pressure value of the pressure monitoring meter is fed back to the control software of the PC upper computer, and the output pressure monitoring meter can be set within the range which is lower than or equal to the pressure in the gas bomb. The pressure value of the pressure sensor to be tested in the test box is controlled through the rear air inlet valve, the air inlet valve and the pressure relief valve of the test box are high-pressure electromagnetic valves, the MCU controls the air inlet valve and the pressure relief valve to work in coordination, when the pressure is input to the air inlet valve, the pressure relief valve is in a closed state, at the moment, the pressure of the pressure sensor to be tested in the test box is completely born, the pressure application is completed once, the pressure application frequency can be set through a PC upper computer, for example, the set 1Hz and 2Hz, theoretically, as long as the response speeds of the two high-pressure electromagnetic valves of the air inlet valve and the pressure relief valve are fast enough, and the PC upper computer can set the same speed. Therefore, a complete pressure application and pressure relief is completed, the MCU is controlled to collect the output signals of each pressure sensor to be detected, and after the set pressure application period is completed, the PC upper computer can generate a text document and can look up and evaluate the output changes of the pressure application of the sensors for different times to be used as the basis of engineering analysis and judgment.

The invention has the beneficial effects that: 1. the MCU is used for controlling the air inlet valve and the pressure relief valve, repeated pressurization and pressure relief of a sensor to be tested can be realized quickly, conveniently and reliably, control and record are carried out through software programming, signal output of the sensor is collected in real time, data at each time are recorded, evaluation basis of output accuracy and reliability during pressurization of different times is provided for sensor manufacturers, and the basis is made for sensor design improvement. 2. The system has the advantages of simple material acquisition, high automation degree and strong flexibility, and is suitable for engineering measurement and reliability evaluation of various pressure range sensors.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

In the figure, 1, a supercharging device, 2, a gas storage bottle, 3, pressure gauges I and 4, a pressure regulating valve, 5, pressure gauges II and II, 6, an air inlet valve, 7, a test box, 8, a pressure relief valve, 9, a pressure relief port, 10, a pressure sensor, 11, an MCU, 12 and a PC host computer.

Detailed Description

The technical solution of the present invention will be further described in detail by the following examples and the drawings attached to the specification.

As shown in fig. 1, the pressure sensor reliability testing system of the present invention includes a pressure boosting device 1, wherein the pressure boosting device 1 inputs compressed air from an input port, an output port is connected to a gas bomb 2, the gas bomb 2 is connected to a pressure gauge i 3 and is connected to an input end of a pressure regulating valve 4 through a gas pipe, an output end of the pressure regulating valve 4 is connected to an air inlet valve 6 of a test box 7 through a pressure gauge ii 5, a plurality of pressure sensors 10 are placed in the test box 7, a pressure relief valve 8 is installed in front of a pressure relief port 9 of the test box 7, the air inlet valve 6 and the pressure relief valve 8 are controlled to be opened or closed by an MCU11, a core chip of the MCU11 is of an SMT32F103ZET6 model, the MCU11 is further provided with a data acquisition module for acquiring pressure value data from each pressure sensor 10, and the MCU11 is connected to a PC upper computer 12; PC host computer 12 gathers manometer I3, the pressure value of manometer II 5 respectively, and control supercharging device 1 stops the pressure boost when manometer I3 reaches certain pressure, merges and saves the pressure value data of gathering manometer II 5 and MCU11 collection pressure sensor 10.

The MCU11 controls the air inlet valve 6 and the pressure relief valve 8 to work in coordination, controls the pressure relief valve 8 to close when the air inlet valve 6 is controlled to open, completes one-time pressure application to the test box 7, and controls the pressure relief valve 8 to open when the air inlet valve 6 is controlled to close, thereby completing one-time pressure relief.

The opening and closing frequency of the air inlet valve 6 and the pressure relief valve 8 is set by the PC upper computer 12 and is completed by the MCU 11.

The fastest frequency of opening and closing the air inlet valve 6 and the pressure relief valve 8 is 2 Hz.

The PC upper computer 12 is provided with an MCU11 test period, pressure value data of the pressure sensor 10 of each pressure application test collected by the MCU11 in the test period are generated into a text document, and output changes of different times of pressure application of the sensor can be consulted and evaluated to serve as a basis for engineering analysis and judgment.

During the use, adopt mill's air supply compressed air as supercharging device 1's power supply (pressure is 4-7Kg usually), possess 0.1-60 times (supercharging device) pneumatic booster pump by this power supply process, increase pressure to corresponding required pressure value and save in gas bomb 2, gas bomb 2 has digital manometer I3, digital manometer I3's pressure value signal passes through the computer software monitoring of PC host computer 12 and feeds back to supercharging device 1's control valve, when reaching the target pressure, supercharging device 1's control valve will automatically regulated pressure boost multiple, in order to reach stable safe pressure, guarantee that the pressure of gas bomb 2 is required pressure value. The rear end of the gas bomb 2 is provided with a pressure regulating valve 3, a pressure gauge II 5 with regulated pressure is arranged at the rear part, the pressure value of the pressure gauge II 5 is fed back to control software of a PC upper computer, and the pressure value is displayed by combining the pressure regulating valve 4 with the pressure gauge II 5, so that the pressure range lower than or equal to the pressure in the gas bomb 2 can be set arbitrarily. The pressure value of the pressure sensor 10 to be tested in the test box 7 is controlled through the rear air inlet valve 6, the air inlet valve 6 and the pressure relief valve 8 of the test box 7 are both high-pressure electromagnetic valves, the MCU11 controls the air inlet valve 6 and the pressure relief valve 8 to work in a coordinated mode, when the air inlet valve 6 inputs pressure, the pressure relief valve 8 is in a closed state, all the pressure sensors 10 in the test box 7 bear the input pressure, the pressure is applied once, the pressure applying frequency can be set through the PC upper computer 12, for example, 1Hz and 2Hz are set, theoretically, as long as the response speeds of the two high-pressure electromagnetic valves of the air inlet valve 6 and the pressure relief valve 8 are fast enough, and the PC upper computer 12 can set the same speed. Thus, a complete pressure application and release will be completed, and the MCU11 is controlled to collect the output signal of each pressure sensor 10 to be tested, and after the set pressure application period is completed, the PC host computer 12 can generate a text file to look up and evaluate the output changes of the sensors for different times of pressure application as the basis for engineering analysis and judgment.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.