| DSP在光纤测温仪中的应用 |
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| 引用本文： | 王莉田,刘永红,王玉田,郑龙江.DSP在光纤测温仪中的应用[J].传感器与微系统,2000,19(1):41-43. |
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| 作者姓名： | 王莉田 刘永红 王玉田 郑龙江 |
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| 作者单位： | 燕山大学,电气工程学院,河北,秦皇岛,066004 |
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| 摘 要： | 介绍一种用于测量指数衰减信号时间常数的数字处理方案 ,它采用固定相移的数字式相敏器检测跟踪被测寿命。具有补偿衰落信号相关和不相关偏差的能力 ,而且信噪比较高。本系统已经在测量荧光衰减时间中得到成功的应用。该测温仪从 0℃到 5 0 0℃的温度误差小于 0 .5℃。
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| 关 键 词： | 荧光寿命 指数信号处理 光纤测温仪 |
| 修稿时间： | : |
Application of DSP at optical fiber thermometer |
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| Abstract: | A
digital signal processing scheme for measurement of the time constants of exponentially
decaying signals is discussed here. The system uses modified digital
phase-sensitive-detection with the phase locked to a fixed value and the modulation period
tracking the measured lifetime. This system has the ability to compensate to correlated
and uncorrected offsets of the decay signal and work with very low signal-to-noise ratio
(SNR=3). Such a system has been successfully applied to measuring the fluorescence decay
time. The thermometer has a temperature error of 0.5 ℃ from 0 ℃ to 500 ℃. |
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| Keywords: | fluorescence lifetime digital signal processing(DSP) optic fiber thermometer |
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