Heat flow meter dynamic characteristic calibration device and method

A calibration device and technology of dynamic characteristics, applied in the field of sensor calibration, can solve the problems of high environmental requirements, low calibration accuracy, manual operation, etc.

Active Publication Date: 2020-10-20
NANJING UNIV OF SCI & TECH
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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 b

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  • Heat flow meter dynamic characteristic calibration device and method
  • Heat flow meter dynamic characteristic calibration device and method
  • Heat flow meter dynamic characteristic calibration device and method

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Embodiment Construction

[0035] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0036] A dynamic characteristic calibration system of transient heat flow sensor based on pulse detonation engine gas jet flow. Such as figure 1 As shown, copper pipes with a diameter of 40-60mm and a length of 1200-1500mm are used as the detonation tube 2, engine fixing frame, hydrogen and oxygen tank 4, nitrogen tank 10, vacuum pump 1, spark plug 8, air valve, pneumatic channel, HFM Type heat flow sensor, data collector and notebook computer.

[0037] The hydrogen and oxygen tank 4 is filled with hydrogen and oxygen according to the ratio of 2:1, which is used as fuel for the pulse detonation engine. The gas tank 4 is connected with the flow-limiting throat, electromagnetic valve, anti-backfire valve, manual valve and combustion chamber in sequence. The function of the flow-limiting throat is to control the gas flow rate of the pipeline to less than 10m / ...

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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 ...

Claims

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Application Information

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IPC IPC(8): G01K19/00
CPCG01K19/00
Inventor 田牧野刘志鹏徐强马虎
Owner NANJING UNIV OF SCI & TECH
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