摘要
本文介绍的基于PCI总线的交流放大采集卡,将应变式传感器供桥驱动电路,前置放大电路,相敏调制解调电路,A/D转换电路,译码、串并行转换逻辑电路,PCI接口电路等高度集成,融为一体。通过它可直接将应变式负荷、变形传感器及差动变压器输出的信号,采集到计算机中进行数据处理。从而,扩展和补充了通用A/D卡所具备的功能。
AC amplifier data acquisition board based on PCI bus is introduced in this article.Some circuits are integrated in the board,such as sensor power driver,preamplifier,modulation and demodulation,A/D conversion,decoding and serial parallel data conversion,PCI interface,and so on.Using the board,the strain load and the signals output by extensometer and differential transformer can be acquired directly to the computer for data processing.Then,the functions of the A/D card are expanded.
出处
《工程与试验》
2011年第1期63-64,共2页
Engineering and Test
关键词
交流放大
A/D转换
串并转换
AC amplifier
A/D conversion
serial parallel data conversion
