半导体激光器在航空发动机实时测温系统中的应用  

Application of Laser Diode in Airplane Engine Real-time Temperature Measurement System

作　　者：夏远飞[1] 刘焕龙[1] 刘勇[1] 

机构地区：[1]空军第一航空学院,河南省信阳市464000

出　　处：《信息化研究》2009年第2期55-57,共3页INFORMATIZATION RESEARCH

摘　　要：传统的航空发动机测温系统采用热电偶方式，这种方式存在系统体积大、重量重、误差大、反应速度慢的缺点。文中介绍了一种利用半导体激光器InGaAs／I做光源，用钽酸锂热释电探测器做光接收器件，以单片机为核心实现的中、高温度实时测量系统。该系统主要由光发射与接收系统、信号放大与处理系统及显示系统3部分组成。介绍了该系统的基本原理、结构和抗干扰措施。经航空发动机实时测温实验结果表明，在要求的测温范围300℃～800℃内，测温精度和反应速度符合设计要求，且与理论分析结果相一致，从而证明了系统设计的正确性。Thermoelectric couple was employed in traditional airplane engine temperature measurement system with the disadvantages of large size, heavy weight, big error and slow response. This paper presents a new kind of real-time temperature measurement system using laser diode InGaAs/I as light source, and using pyroelectric detector LiTaO3 as optical receiving unit and using a microprocessor as signal processing center. This instrument consists of three parts： optical emitting and receiving system, signal amplifying and controlling system, and display system. The principle, structure, anti-interference measure of the system are introduced. Experimental results of airplane engine real-time temperature measurement show that temperature measurement accuracy and response time conform to our requirement in the range of 300 ℃ - 800℃ and agree with prediction of theory. All these prove that the design is correct.

关 键 词：热释电探测器 温度测量 半导体激光器 实时测量 辐射测温 

分 类 号：TP274.4[自动化与计算机技术—检测技术与自动化装置]