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

作　　者：成龙[1,2] 董和磊[1,2] 汤丽 CHENG Long;DONG Helei;TANG Li(College of Semiconductors and Physics,North University of China,Taiyuan 030051,China;State Key Laboratory of Dynamic Measurement Technology,North University of China,Taiyuan 030051,China;25th Institute of Aerospace Science and Industry Second Institute,Beijing 100076,China)

机构地区：[1]中北大学半导体与物理学院,山西太原030051 [2]中北大学动态测试技术国家重点实验室,山西太原030051 [3]中国航天科工二院二十五所,北京100076

出　　处：《测试技术学报》2024年第4期420-426,共7页Journal of Test and Measurement Technology

摘　　要：为使圆箔式热通量传感器满足不断发展的高超声速风洞等极端环境中动态热通量监测需求,采用了大功率半导体激光器作为热通量源,搭建了热流动态标定平台,并对系统产生的激光束能量进行了测量分析,确保了后续实验的科学性与合理性。系统产生热流密度达每平方米兆瓦级别,脉冲激励宽度为毫秒级别。通过动态响应实验,研究了戈登计动态响应时间与激励激光参数的关系。结果表明,在一定范围内,时间常数与激光功率、脉冲宽度为负相关关系。当激光脉冲宽度小于传感器时间常数一个数量级附近时,可以被视为理想脉冲激励。同时还得到了激光参数与产生热通量的线性关系,证明了采用激光法进行测试标定的可行性。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 feasibilityof using the laser method for test calibration. The related research content provides a reference for thedynamic 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 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] V19[自动化与计算机技术—控制科学与工程]