| 针对SF6分解气的多参数综合监测平台设计 |
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| 引用本文： | 皮本熙,王艺钊,赵博涛,聂德鑫,程林.针对SF6分解气的多参数综合监测平台设计[J].导航与控制,2017,16(3):74-78. |
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| 作者姓名： | 皮本熙 王艺钊 赵博涛 聂德鑫 程林 |
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| 作者单位： | 1. 国网电力科学研究院武汉南瑞有限责任公司,武汉,430074;2. 北京航天控制仪器研究所北京市光纤传感系统工程技术研究中心,北京,100094 |
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| 摘 要： | 设计了SF6分解气多参数综合监测平台,选择多频正弦调制方法研发了基于FPGA的多通道锁相放大电路,并对多通道锁相放大原理进行了理论推导,提出一种多频调制信号的频率分配原则.搭建针对多组分气体的多参数综合监测平台,给出温度、压强、微水、SF6纯度等传感器的集成方案.实验结果表明,本系统平台能够从较低浓度的H2S、HF、CO混合气体中正确解调出二次谐波信号,不同气体的二次谐波之间干扰性较小,对弱吸收的CO气体信号提高2个数量级,实现了多组分微量气体的同时监测.
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| 关 键 词： | 多频正弦调制 FPGA 锁相放大电路 二次谐波 在线监测 |
Design of Multi-parameter Comprehensive Monitoring Platform
for SF6 Decomposition Gases |
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| PI Ben-xi,WANG Yi-zhao,ZHAO Bo-tao,NIE De-xin and CHENG Lin.Design of Multi-parameter Comprehensive Monitoring Platform
for SF6 Decomposition Gases[J].Navigation and Control,2017,16(3):74-78. |
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| Authors: | PI Ben-xi WANG Yi-zhao ZHAO Bo-tao NIE De-xin and CHENG Lin |
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| Affiliation: | 1.State Grid Electric Power Research Institute, Wuhan NARI Limited Liability Company, Wuhan 430074,2.
Beijing Optical Fiber Sensing System Engineering Technology Research Center,
Beijing Institute of Aerospace Control Devices, Beijing 100094,2.
Beijing Optical Fiber Sensing System Engineering Technology Research Center,
Beijing Institute of Aerospace Control Devices, Beijing 100094,1.State Grid Electric Power Research Institute, Wuhan NARI Limited Liability Company, Wuhan 430074 and 1.State Grid Electric Power Research Institute, Wuhan NARI Limited Liability Company, Wuhan 430074 |
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| Abstract: | The paper designs a multi-parameter comprehensive monitoring platform for SF6 decomposition gases. Multichannel lock-in amplifier circuits with multi-frequency modulation method is used in FPGA system. In this issue, the multichannel lock-in amplifier theories are presented in details, and one kind of frequency allocation principle of multi-frequency modulation signals is proposed. The sensor integration method of temperature, pressure, water vapor and the SF6 purity is utilized through establishing the multi-parameter comprehensive monitoring platform for mixed gases. The experimental results indicate that the device developed in this paper could demodulate the second harmonic signals correctly from fewer mixed gases included H2S, HF and CO. These signals have smaller disturbance among different second harmonics. In addition, the signal of CO that has weaker absorption coefficient is amplified 100 times. Thus, the on-line monitoring technique at the same time for multi-component fewer gases is realized. |
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| Keywords: | multi-frequency modulation FPGA lock-in amplifying circuit second harmonic on-line monitoring |
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