| 多光谱表面温度计信号调理电路设计及环境适应性研究 |
| Research on Signal Conditioning Circuit Design and Environment Adaptability of Multispectral Surface Thermometer |
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| 中文摘要: |
| 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，这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；创新性的采用了输入保护环、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。 |
| 英文摘要: |
| Multispectral temperature measurement is an important method for measuring the surface temperature of the hot end of engines and heavy-duty gas turbines. However, due to the unfavorable factors such as large temperature difference in the background environment, uncertain humidity and electromagnetic interference, the weak signal processing of the multispectral surface thermometer is very difficult. This article focuses on the design of weak signal conditioning circuits for multispectral surface thermometers in complex environments. The near infrared detector which is suitable for multispectral surface thermometer is studied and selected. The accuracy of signal amplification is improved because of the technologies of guard ring and kelvin switch. The selection method of circuit board sheet, the circuit three anti-technology and the specific implementation of anti-electromagnetic interference are introduced. The experiment results show that the multispectral surface thermometer meets the measurement needs and has certain environmental adaptability. |
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| 中文关键词: 多光谱测温 微弱信号调理电路 开文尔开关 输入保护环 环境适应性 |
| 英文关键词:multi-spectral temperature measurement weak signal conditioning circuit Kelvin switch Guard ring environmental adaptability |
| 基金项目: |
| DOI：10.11823/j.issn.1674-5795.2020.02.06 |
| 引用本文：金振涛，杨永军，张学聪，李丹，温悦.多光谱表面温度计信号调理电路设计及环境适应性研究[J].计测技术,2020,(2):. |
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