测试技术学报2024，Vol.38Issue(4)：420-426,7.DOI:10.3969/j.issn.1671-7449.2024054
基于激光法的圆箔式热流传感器动态特性研究
Dynamic Characterization of Circular Foil Heat Flow Sensor Based on Laser Method
成龙 1董和磊 1汤丽2
作者信息
- 1. 中北大学 半导体与物理学院,山西 太原 030051||中北大学 动态测试技术国家重点实验室,山西 太原 030051
- 2. 中国航天科工二院二十五所,北京 100076
- 折叠
摘要
Abstract
In order to make the circular foil heat flux sensor meet the ever-developing needs of dynamic heat flux monitoring in extreme environments such as hypersonic wind tunnels,a heat flux dynamic calibra-tion platform was constructed by adopting a high-power semiconductor laser as the heat flux source,and the laser beam energy generated by the system was measured and analyzed to ensure the scientificity and reasonableness of the subsequent experiments.The system generates heat flow densities in the megawatt per square meter class with pulse excitation widths in the millisecond class.The relationship between the time constant measured by the Gordon gauge and the excitation laser parameters was investigated through dynamic response experiments.The results show that the time constant is negatively correlated with the laser power and pulse width within a certain range.When the laser pulse width is less than one order of magnitude near the sensor time constant,it can be regarded as an ideal pulse excitation.The linear rela-tionship between the laser parameters and the generated heat flux is also obtained,indicating the feasibility of using the laser method for test calibration.The related research content provides a reference for the dynamic calibration of sensors using the laser method.关键词
热流传感器/热通量/时间常数/激光功率/激光脉冲宽度Key words
heat flow sensor/heat flux/time constant/laser power/laser pulse width分类
信息技术与安全科学引用本文复制引用
成龙,董和磊,汤丽..基于激光法的圆箔式热流传感器动态特性研究[J].测试技术学报,2024,38(4):420-426,7.
