Static performance calibration device and method for high-temperature strain sensor

Abstract

The invention belongs to the technical field of high-temperature strain testing, and relates to a static performance calibration device and method for a high-temperature strain sensor. The calibrationdevice is composed of a high-temperature furnace and a loading measurement system, the high-temperature furnace is composed of a heating and heat preservation unit, a clamping unit and a temperaturecontrol unit, and the loading measurement system is composed of a loading unit and a measurement unit. According to the calibration method, the high-temperature strain sensor static performance calibration device is adopted for calibration, the clamping system is firstly installed, then the calibration beam is installed, the measurement system is loaded, and finally the sensitivity coefficient andthe drift rate of the high-temperature sensor are calibrated. The method has the characteristics of simple operation, high test precision, good repeatability, large temperature change range and reliable experiment result, and provides an effective experiment platform for static calibration of the performance parameters of the resistance strain sensor at high temperature.

Description

technical field [0001] The invention belongs to the technical field of high-temperature strain testing, and relates to a static performance calibration device and a calibration method for a high-temperature strain sensor. Background technique [0002] Domestic aviation technology is in a stage of rapid development. Aeroengines are the core components of spacecraft, and most of them use turbine engines. As the main components of engines, blades will be subjected to high temperature, high vibration, thermal Combined effects such as airflow, as the use time increases, the blades are easily damaged, causing the engine to fail. Therefore, it is necessary to monitor the strain of blades working in harsh environments such as high temperature. [0003] At this stage, the use of resistance strain gauges to detect the force and strain of aeroengine turbine blades is a relatively mainstream method, and the resistance strain gauges used must meet the requirements of high test accuracy,...

AI Technical Summary

Problems solved by technology

In order to solve the problem that the existing strain gauge calibration device has low working temperature, high-temperature calibration device has high requirements for the substrate, and it is difficult to control the loading micro-strain accuracy at high temperature, the invention adopts an equal-strength beam as the calibration beam, which can withstand high temperature; adopts displacement The loading method applies a load to the beam of equal strength, and completes the test calibration of the performance parameters of the strain gauge (GF), drift rate, creep, thermal output, mechanical output, and hysteresis in a high-temperature environment.

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