Temperature sensor dynamic calibration system based on double pulse lasers

Abstract

The invention discloses a temperature sensor dynamic calibration system based on double pulse lasers. A pulse time-delay trigger triggers two single-pulse lasers in a time-sharing manner, so that two laser pulses of the two single-pulse lasers are irradiated on a temperature sensor to be calibrated through respective light path systems, the temperature sensor is externally connected with a high-time-resolution dynamic signal acquisition system which is used for acquiring corresponding signals of the temperature sensor, and calibration of the temperature sensor is completed through the interval of the peak-to-peak value of the response signal and the time interval of the trigger signal. According to the method, the thermal response dynamic characteristics of the sensor are determined through the time relative deviation between the standard double-pulse signal time interval of the pulse delay trigger and the response signal peak-to-peak value interval of the temperature sensor, and the influence of pulse quality such as monopulse laser power, transverse mode and longitudinal mode distribution and the like on the calibration result is avoided.

Description

technical field [0001] The invention relates to the technical field of dynamic temperature calibration, in particular to calibrating the dynamic response characteristics of a temperature sensor by using a double-pulse laser with a time precision above microsecond level. Background technique [0002] In the field of aerospace and metallurgy, there are a large number of high-temperature, microsecond-level transient temperature measurement requirements, such as the design and manufacture of aviation and aerospace engine blades, and the continuous casting process monitoring of special steel. At present, the microsecond-level temperature sensors used in the above extreme environments mainly include MEMS film temperature sensors, thermistors and optical temperature sensors, and how to solve the dynamic thermal response calibration of these sensors is the premise to ensure accurate and reliable measurement results , but so far the relevant research at home and abroad is still in th...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that the traditional dynamic temperature calibration technology is difficult to produce microsecond-level and above temperature steps with high repeatability and low uncertainty, and cannot satisfy the dynamic calibration of microsecond-level temperature sensors, the present invention proposes a dual-pulse laser-based temperature calibration method. A new dynamic calibration system for dynamic calibration of the sensor, and redefines the time constant of the temperature sensor, the time resolution can reach micro-nanosecond level or even higher

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