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Device and method for calibrating dynamic characteristics of heat flow meter

A calibration device and dynamic characteristics technology, applied in the field of sensor calibration, can solve the problems of manual operation, low calibration accuracy, and high environmental requirements, and achieve the effects of reducing manual errors, improving dynamic characteristics, and accurate and reliable experimental data

Active Publication Date: 2022-05-13
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 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

Method used

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  • Device and method for calibrating dynamic characteristics of heat flow meter
  • Device and method for calibrating dynamic characteristics of heat flow meter
  • Device and method for calibrating dynamic characteristics of heat flow meter

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Embodiment Construction

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

[0036] A transient heat flow sensor dynamic characteristic calibration system based on pulse-knock engine gas jet. as Figure 1 As shown, including a diameter of 40 ~ 60mm, length of 1200 ~ 1500mm copper tube as a knock tube 2, engine mount, hydrogen oxygen tank 4, nitrogen tank 10, vacuum pump 1, spark plug 8, pneumatic valve, pneumatic channel, HFM type heat flow sensor, data collector and notebook computer.

[0037]The hydrogen-oxygen tank 4: Hydrogen-oxygen is loaded in a 2:1 ratio as fuel for the pulse-knock engine. Tank 4 is in turn connected to the flow restriction throat, solenoid valve, anti-tempering valve, manual valve and combustion chamber. The role of the flow restriction throat is to control the gas flow rate of the pipeline less than 10m / s to ensure the safety of the experiment. The anti-tempering valve prevents the hydrogen from tempering after ignit...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K19/00
CPCG01K19/00
Inventor 徐强田牧野刘志鹏马虎
Owner NANJING UNIV OF SCI & TECH
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