Device and method for calibrating dynamic characteristics of heat flow meter

Abstract

The invention belongs to the field of sensor calibration, and in particular relates to a dynamic characteristic calibration device and method of a heat flow meter. Including the detonation tube, both ends of the detonation tube are provided with end caps, one end cap is provided with a spark plug for ignition, and the opposite end cap is connected with a heat flow meter to be measured and a standard heat flow meter adjacently arranged. A long pipe with a port sealed by a diaphragm is installed on the end cover farthest from the heat flow meter as a pressure relief outlet; the detonation pipe is detachably connected with an exhaust mechanism, a gas supply mechanism and a nitrogen supply mechanism . The device simultaneously studies and calibrates the thermal radiation and convective heat transfer processes, which not only ensures that the transient heat flow sensor can obtain reliable and accurate heat flow test data, but also provides a feasible dynamic calibration method for the development and performance evaluation of the heat flow sensor.

Description

Technical field [0001] The present invention belongs to the field of sensor calibration, specifically relates to a thermal flow meter dynamic characteristics calibration device and method. Background [0002] With the development of science and technology, people are increasingly required to measure dynamic non-electric or measure non-electric during movement. For example, the measurement of transient temperature and pressure of certain parts of aviation and space vehicles, the weighing of objects during loading and unloading or in motion; the detection of the magnitude and change of cutting forces, the pressure in the chamber of guns, the heat flow of engine knocks, the measurement of transient processes of temperature, and so on. If the dynamic performance of the sensor is poor, it is impossible to quickly and accurately reflect the measured changes. [0003] Sensor dynamic characteristics refer to the relationship between the output value measured by the sensor and the increm...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a dynamic characteristic calibration device and method of a heat flow meter, which uses the gas jet of the pulse detonation engine and the calibrated heat flow meter to calibrate the heat flow meter to be calibrated, which solves the problem of the complicated structure of the current calibration tool and the high environmental requirements And the calibration process is mainly manual operation, the calibration accuracy is low, and the work efficiency is low

Images