System and method for fast response thermocouple dynamic characteristic calibration based on miniature detonation field

Abstract

The present invention discloses a system and method for fast response thermocouple dynamic characteristic calibration based on a miniature detonation field. A lot of gas is generated at the moment of self-reaction substance thermal decomposition, a diaphragm is burst to generate high-temperature and high-pressure detonation air flow as a basis, and high-slope temperature pulse signals with a certain width are provided as a fast response thermocouple calibration excitation source to realize dynamic characteristic calibration. The experiment system corresponding to the method comprises a heating and temperature control system, a fire blast field, a diaphragm, a fire blast experimental section, a thermocouple to be calibrated, a thermocouple fixed support, a pressure sensor, a test sample, an amplification circuit, a data collection card and a computer. The system and method for fast response thermocouple dynamic characteristic calibration based on the miniature detonation field can realize dynamic characteristic calibration of the ten-millisecond grade rapid response thermocouple.

Description

technical field [0001] The invention relates to a fast-response thermocouple dynamic characteristic calibration system and method, in particular to a fast-response thermocouple dynamic characteristic calibration system and method based on a small detonation field. Background technique [0002] Nowadays, in the fields of military industry and aerospace, transient temperature measurement plays an increasingly critical role in the development and optimization of weapons and aerospace equipment. For example: to study the ablation mechanism and protective measures of rocket high-temperature plume flames on various components; to study the influence of high-temperature flames in the combustion chamber of internal combustion engines on the life of the bore wall; to explore the explosive power of explosives, it is necessary to measure the temperature of the explosion shock wave front, etc. The temperature field in these occasions has many characteristics such as transient high tempe...

AI Technical Summary

Problems solved by technology

However, the calibration device of the hot wind tunnel method is very bulky and expensive, and uses mechanical action to generate a step temperature, which cannot provide a steep enough step front, and it is difficult to achieve fast response thermocouple dynamic characteristic calibration applied in these fields

The shock tube also has the problems of large volume and high cost, and it is difficult to generate a high step temperature through the shock tube method, which makes the calibration experiment difficult

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