摘要
多光谱测温是发动机和重型燃机热端表面温度测量的一种重要方法,但是由于背景环境温差大、湿度不确定和电磁干扰等不利因素,给多光谱表面温度计微弱信号处理带来非常大的困难。本文主要研究适用于复杂环境下的多光谱表面温度计微弱信号调理电路设计,研究选型适用于多光谱表面温度计的近红外探测器方法;创新性地采用了输入保护环、开尔文开关等技术,提升了信号放大的准确性;介绍了电路板板材选用方法,电路三防工艺和防电磁干扰的具体实施方式。通过实验表明,多光谱表面温度计满足测量需求,具有一定的环境适应能力。
The main problem in the application of radiation pyrometer to the measurement of true surface temperatures of turbine blade and heavy duty gas turbines is the large error arising from the unknown emissivity of the surface,high speed and electromagnetic interference.This article focuses on the design of weak signal conditioning circuits for multispectral surface thermometers in complex environments and the study of the near infrared detector that is suitable for multispectral surface thermometer.The accuracy of signal is improving because of the technologies of guard ring and the Kelvin switch.Some special treatment,such as Teflon material and special circuit surface treatment,has improved anti-interference ability and environmental adaptability of signal processing.The results show that temperature measurement error of this multi-wavelength pyrometer is fulfil the requirements and has a certain environmental adaptability.
作者
金振涛
杨永军
张学聪
李丹
温悦
JIN Zhentao;YANG Yongjun;ZHANG Xuecong;LI Dan;WEN Yue(Changcheng Institute of Me trology&Measurement,Beijing 100095,China)
出处
《计测技术》
2020年第2期31-37,共7页
Metrology & Measurement Technology
基金
国家重大科学仪器设备开发专项(2016YFF0100600)。
