In this paper we present the implementation of a digital lock-in amplifier (LIA) completely based on Labview with a general-purpose data acquisition board (or a high quality sound card) and a high-gain low-noise amplifier

采用NI公司的PCI-6224多功能数据采集(DAQ)板卡并基于图形化的LabVIEW进行编程，设计了多通道数据采集与显示系统。该系统可通过完整的人机交互界面进行试验参数设置和功能选择，并可对数据采集卡上传的数据进行实时显示和处理，并具有数据存储、回放及波形重新显示功能。-This paper employs the NI PCI-6224, a multifunctional data acquisition (DAQ) board , a multi-channel data acquisi

本文提出了一种基于计算机的数据采集系统,在中文 Windows 平台下,运用美国国家仪 器公司的 LabVIEW 工具软件和恒凯电子公司的数据采集板,实现模拟超高压输电线路故障录 波功能的微机应用软件包。-In this paper, a computer-based data acquisition system is proposed. Under the Chinese Windows platform, the National Instruments LabVIEW softw