| 检测元件的非线性对锁定放大器的影响分析 |
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| 引用本文： | 刘日龙,冯志华,孔凡让,刘志刚,张平.检测元件的非线性对锁定放大器的影响分析[J].自动化与仪表,2005,20(4):16-19. |
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| 作者姓名： | 刘日龙 冯志华 孔凡让 刘志刚 张平 |
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| 作者单位： | 中国科学技术大学,精密机械与精密仪器系,安徽,合肥,230027 |
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| 摘 要： | 锁定放大器主要用在强噪声环境下的有用信号提取,而检测元件的非线性不仅会带来测量误差,同时还会使环境噪声进入放大器,带来检测性能的降低,也影响了锁定放大器检测灵敏度的进一步提高。以简单的透光检测试验装置为例,试验验证了这种现象的存在,同时也从理论上分析了产生这种现象的机理,指出了它的伴随特性,且很难通过后续信号处理加以消除。
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| 关 键 词： | 锁定放大器 检测灵敏度 影响 光电检测 非线性 噪声 |
| 文章编号： | 1001-9944(2005)04-0016-04 |
Analysis of the Influence of the Sensor's Non-linearity to the Lock-in Amplifier |
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| LIU Ri-long,FENG Zhi-hua,KONG Fan-rang,LIU Zhi-gang,ZHANG Ping.Analysis of the Influence of the Sensor''''s Non-linearity to the Lock-in Amplifier[J].Automation and Instrumentation,2005,20(4):16-19. |
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| Authors: | LIU Ri-long FENG Zhi-hua KONG Fan-rang LIU Zhi-gang ZHANG Ping |
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| Abstract: | The lock-in amplifier is mainly used in the detection of very weak signals.The non-linearity of sensing part not only generates the error of measurement,but also gives the way to the noise into the amplifier,degrading the characters of the lock in amplifier,detaining the heightening of the amplifier's sensitivity.A simple device of measuring the translucency is used to testify the phenomena's existence,and has been proved theoretically.Its accompanying character is pointed out,and the noise may be diminished very difficultly. |
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| Keywords: | lock-in amplifier detection sensitivity influence light detecting non-linearity noise |
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