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| 一种新型数字锁相放大器的设计及其优化算法 | |
| 引用本文： | 李刚,张丽君,林凌. 一种新型数字锁相放大器的设计及其优化算法[J]. 天津大学学报(自然科学与工程技术版), 2008, 41(4): 429-432 |
| 作者姓名： | 李刚 张丽君 林凌 |
| 作者单位： | 天津大学精密仪器与光电子工程学院天津市生物医学检测技术与仪器重点实验室,天津300072 |
| 摘 要： | 为了提高信号的检测准确度，简化数字锁相放大器（digital lock—in amplifier，DLIA）的构建电路，将过采样技术应用到DLIA中；并对过采样引发的大存储量和大运算量问题，提出一种算法，从而有效地减小了数据的存储量和运算量．结果表明，该方法在不需要高性能微处理器支持的情况下，提高了DLIA的检测准确度和性价比，缩小了DLIA的体积，并可广泛应用于微弱信号的检测． |
| 关 键 词： | 过采样 数字锁相放大器 高准确度 优化算法 |
Design of a New Digital Lock-in Amplifier and Its Optimization Algorithm |
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| LI Gang,ZHANG Li-jun,LIN Ling. Design of a New Digital Lock-in Amplifier and Its Optimization Algorithm[J]. Journal of Tianjin University(Science and Technology), 2008, 41(4): 429-432 | |
| Authors: | LI Gang ZHANG Li-jun LIN Ling |
| Affiliation: | ( Tianjin Key Laboratory of Biomedical Detecting Techniques and Instruments, School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China ) |
| Abstract: | In order to improve the precision of detection signal and predigest the constructive circuit of digital lock-in amplifier （ DLIA ）, oversampling was applied in DLIA and a quick algorithm was presented to deal with the problem of a mass of data caused by oversampling in this paper, which reduced data memory largely and promoted the speed of operation rapidly.The results show that this method increases DLIA＇s precision, reduces its volume and raises the capability/price ratio without high performance microprocessor, and can be applied in weak signal detection widely. |
| Keywords: | over-sampling digital lock-in amplifier high precision optimization algorithm |
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