Calibration device for high temperature and high pressure sensor

Abstract

The invention relates to a calibration device for a high temperature and high pressure sensor. The device comprises a high pressure metering pump (1) connected to an autoclave (3) through a hollow tube (2), the autoclave (3) is provided with a to-be-calibrated sensor (6), wherein a resistor disc (4) for heating the to-be-calibrated sensor (6) is arranged in the autoclave (3), the resistor disc (4)is wrapped around the to-be-calibrated sensor (6), a heat insulation cover (5) is arranged in the autoclave (3), and the resistor disc (4) and the to-be-calibrated sensor (6) are placed in the heat insulation cover (5). During the calibration, the autoclave needs to be pressurized by using the high pressure metering pump through the hollow tube, when the pressure is stabilized to a set value, direct current is applied to the resistor disc to achieve local rapid heating in the autoclave, a temperature-pressure curve can be drawn through pressure data read via a data collector, and the high temperature and high pressure sensor can be calibrated at different temperatures by comparing the pressure with the pressure in the autoclave shown by the high pressure metering pump.

Description

technical field [0001] The invention relates to a calibration device for high-temperature and high-pressure sensors, belonging to the technical field of measurement and testing. Background technique [0002] With the rapid development of aerospace technology, some high-thrust-to-weight ratio engines and high-specific impulse space shuttles serving in high-temperature and extreme environments have higher and higher requirements for dynamic pressure detection. Some key parts of aircraft / engines need to be in The pressure is monitored online in an environment above 1000°C, and the sensor is an important tool for online measurement of pressure parameters, which can obtain real-time and accurate measurement parameters. Therefore, the development of sensors for high-pressure monitoring in extreme high-temperature environments is extremely important for the control and regulation of aircraft combustion instability, and is of great significance for evaluating the performance of engi...

AI Technical Summary

Problems solved by technology

The patent application number is 200520141911.2. In the utility model patent "a high-temperature autoclave experimental device for optical fiber sensors", an autoclave is placed in the thermostat, and the optical fiber sensor is tested and calibrated by heating the autoclave as a whole. , this method can test and calibrate the pressure sensor at a lower temperature (500°C), but when the temperature is higher than 500°C, or even higher than 1000°C, due to the overall heating of the pressure vessel, it will The strength of the autoclave material is greatly reduced, and the ability to withstand pressure and pressure is also greatly reduced, resulting in danger. Therefore, this device cannot meet the test and calibration of pressure sensors in environments higher than 1000 °C

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