Calibration device for ultra-high temperature pressure sensor

Abstract

A calibration device for ultra-high temperature pressure sensors, including ultra-high temperature temperature control equipment, high temperature resistant pressure tubes, pressure controllers, mechanical pumps, nitrogen cylinders, sensor tooling, heat dissipation tooling, acquisition systems, and temperature measurement parts; On the one hand, the pressure sensor to be tested and the pressure controller communicate with each other, that is, the pressure value displayed by the pressure controller is the pressure value at which the pressure sensor to be tested is located. In terms of temperature control, the high-temperature pressure-bearing tube passes through the two ends of the ultra-high temperature temperature control equipment with multi-temperature zones and segmental heating to provide a stable high-temperature calibration environment; in addition, a temperature measurement part is provided to detect the pressure sensor to be tested in real time The temperature at which it is located reduces the pressure measurement error caused by the temperature. The invention solves the problem of calibrating the ultra-high temperature pressure sensor not lower than 1000°C, can directly calibrate the complete machine of the ultra-high temperature pressure sensor, and has a simple device and is easy to implement.

Description

technical field [0001] The invention relates to a calibration device for an ultra-high temperature pressure sensor, belonging to the field of pressure sensor calibration. Background technique [0002] Ultra-high temperature pressure sensors are used to measure pressure parameters in ultra-high temperature and harsh environments. They are special pressure sensors and play a very important role in ultra-high temperature extreme environments such as aerospace and industrial production. [0003] The pressure sensor calibration is to obtain the relationship between the output of the sensor and the pressure input by some method. Because the output of the pressure sensor changes with the temperature of the measured medium, that is, zero temperature drift and sensitivity temperature drift, which are also the main factors causing pressure measurement errors, so the sensor output and the temperature of the measured medium must be measured during pressure calibration. changing relatio...

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Problems solved by technology

The calibration device of Kunshan Tailai Hongcheng Sensing Technology Co., Ltd. does not consider the key temperature control problem during calibration; Peking University proposes to place a thermal resistor near the pressure sensor to ensure that the temperature of the sensor is stable during calibration. However, the device uses high temperature Signal lead transfer, on the one hand, reduces the reliability, on the other hand, it is not suitable for the calibration of the sensor with its own cable and printed board; and the high temperature heat transfer in the electric furnace will cause the seal at room temperature to be damaged during calibration. Ineffective due to temperature rise, not suitable for long-term ultra-high temperature pressure calibration

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