Heat flow meter dynamic characteristic calibration device and method

Abstract

The invention belongs to the field of sensor calibration, and particularly relates to a heat flow meter dynamic characteristic calibration device and method. The device comprises a detonation tube; end covers are arranged at the two ends of the detonation tube; a spark plug used for ignition is arranged on the end cover on one side; a to-be-tested heat flow meter and a standard heat flow meter which are adjacently arranged are connected to the end cover on the opposite side; a long tube with a port sealed by a diaphragm is installed on the end cover farthest away from the heat flow meter and serves as a pressure relief outlet; and the detonation tube is detachably connected with an exhaust mechanism, a fuel gas supply mechanism and a nitrogen supply mechanism. The device studies and calibrates heat radiation and convective heat transfer processes at the same time, ensures that the transient heat flow sensor can obtain reliable and accurate heat flow test data, and provides a feasible dynamic calibration method for research and performance evaluation of the heat flow sensor.

Description

technical field [0001] 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. Background technique [0002] With the development of science and technology, people are increasingly required to measure dynamic non-electricity or measure non-electricity during exercise. For example, the measurement of transient temperature and pressure of some parts of aviation and aerospace vehicles, the weighing of objects during loading and unloading or in motion; the detection of the magnitude and change of cutting force, the internal pressure of guns, engine detonation heat flow, The measurement of the transient process of temperature and so on. If the dynamic performance of the sensor is not good, it will not be able to quickly and accurately reflect the changes of the measured. [0003] The dynamic characteristic of the sensor refers to the relationship between the output value ...

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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

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