基于LabVIEW的锁相放大器的设计与测量  

Design and measurements of lock-in amplifier based on LabVIEW

作　　者：王力[1] 施芸城[1] 杨忠杰[1] 杨旭方[1] 苗晓莉[1] 

机构地区：[1]东华大学理学院物理实验中心,上海200051

出　　处：《物理实验》2015年第9期33-36,共4页Physics Experimentation

基　　金：东华大学理学院大学生创新基金

摘　　要：利用LabVIEW软件和PCI-6251采集卡设计了虚拟锁相放大器.通过对图形化锁相放大器的相敏检波特性,奇偶谐波的抑制能力以及频率响应,白噪声抑制等进行了测量,发现其具有与仪器化锁相放大器同等甚至更好的抑制噪声的能力.A virtual lock-in amplifier was designed based on NI LabVIEW software platform and PCI-6251 acquisition card. A series of measurements like phase sensitive detection, noise suppression by even and odd harmonics and frequency response had been done with a good accuracy. The measure- ment results demonstrated that this virtual lock-in amplifier had a good and even better performance of noise suppression compared with normal instrumental lock-in amplifier.

关 键 词：锁相放大器 LABVIEW 相敏检波 噪声抑制 

分 类 号：TN722[电子电信—电路与系统]