Pressure sensor high-temperature dynamic calibration device

Abstract

The invention provides a pressure sensor high-temperature dynamic calibration device. A first temperature sensor is arranged on a shock tube and used for transmitting a temperature signal to a temperature console; a high-pressure chamber heating device is arranged on the shock tube, a second temperature sensor is arranged in a shock tube low-pressure chamber, and a low-pressure chamber heating device is further arranged in the shock tube low-pressure chamber; the second temperature sensor transmits the temperature signal to the temperature console, the temperature console transmits the secondtemperature signal to a data collection and analysis system; the second temperature sensor and a calibrated pressure sensor input temperature and pressure signals to the data collection and analysis system through a velocity-measuring system, and then the temperature and pressure signals are output through output equipment; a normally-close contact is connected with a tail end of the shock tube, the pressure and temperature signals of the shock tube are conveyed to the data collection and analysis system through the signal settling, and are output through the output equipment. The actual performance of the weaponry can be truly reflected. And the calibration device can be properly served as the pressure sensor high-temperature dynamic calibration device.

Description

technical field [0001] The invention relates to a high-temperature dynamic calibration device for a pressure sensor, which belongs to the field of measurement and is directly applied to the dynamic calibration of a pressure sensor in a high-temperature environment. Background technique [0002] With the rapid development of weapons and equipment, pressure sensors are widely used in the military field, mainly including missile launch, ship engine testing and artillery shooting: missile launch tests require dynamic measurement of shock wave pressure signals, among which pressure sensors are the key link , its dynamic characteristics will directly affect the accuracy and reliability of the test system; a large number of pressure sensors are used in the ship engine test to obtain relevant pressure information, such as using piezoresistive pressure sensors to reflect the gas compression process in the cylinder, combustion and discharge The cylinder pressure signal during the ther...

AI Technical Summary

Problems solved by technology

[0003] However, there are still deficiencies in my country's dynamic calibration of pressure sensors: First, it cannot reflect the temperature response characteristics of pressure sensors

Sensors are sensitive to temperature effects, and their input and output characteristics change with temperature conditions, and there is a thermal sensitivity drift. For example, the temperature coefficient of the 113B28 pressure sensor of PCB Company is 0.054 % / ℃, and there are differences in performance indicators under high temperature and normal temperature environments. If the data calibrated at room temperature is used all the time, it will inevitably lead to inaccurate pressure information

Second, the characteristic parameters in the actual working environment cannot be obtained

Third, the measurement uncertainty of the calibration is not applicable to the actual

[0004] At present, my country has not established a national standard for dynamic pressure. Except for shock tubes, other pressure calibration devices such as sinusoidal pressure calibration devices and drop weight pressure calibration devices cannot be effectively traced.

The shock tube devices currently established are all dynamic calibrations of pressure sensors at room temperature, and the sensitivity and other information given are all information in non-working conditions, which cannot truly reflect the actual performance of weapons and equipment. There are no institutions and enterprises in China that have Conditions and equipment for dynamic pressure calibration in high temperature environment

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