文章摘要
引用本文:皮本熙1,王艺钊2,赵博涛2,聂德鑫1,程林1.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,(3):74-78 本文二维码信息
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针对SF6分解气的多参数综合监测平台设计
Design of Multi-parameter Comprehensive Monitoring Platform for SF6 Decomposition Gases
  
DOI:
中文关键词:  多频正弦调制  FPGA  锁相放大电路  二次谐波  在线监测
English Keywords:multi-frequency modulation  FPGA  lock-in amplifying circuit  second harmonic  on-line monitoring
基金项目:
作者单位
皮本熙1 1.国网电力科学研究院武汉南瑞有限责任公司,武汉 430074 
王艺钊2 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 
赵博涛2 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 
聂德鑫1 1.国网电力科学研究院武汉南瑞有限责任公司,武汉 430074 
程林1 1.国网电力科学研究院武汉南瑞有限责任公司,武汉 430074 
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中文摘要:
      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。
English Summary:
      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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