12位多通道零相位差大容量数据采集系统

A 12-Bit 16 Channel Zero Phaseshift and Large Amount Data Acquisition System

介绍了一种基于ＩＢＭ－ＰＣ机的１２ 位１６ 通道零相位差大容量数据采集系统，它包括摸拟输入，Ａ／Ｄ转换器，ＤＳＰ技术，ＤＭＡ传输，数据缓存，数据打包，大容量数据存储技术以及计算机接口等电路的设计与实现，该系统已经达到了预定的设计目标。

A PC based 12 bit, 16 channel, zero phaseshift, large amount data acquisition and recording system is described. The system contains 16 wide band analog amplifiers, 4 4 channel A/D converters (AD7874), 1 ADSP2181 (digital signal processor) and a PC interface (ISA) circuit, etc. The guaranteed conversion rate of the system is up to 7 kHz if 16 channels are fully used, or 125 kHz if only one channel is used. When it works, the ADSP2181 can control the converters and catch the digital signals transfered out from the converters. Then the data are sent to a computer by the ADSP2181 and saved to a hard disk through IDE. The data can also be processed in the ADSP2181 after they are transferred into DSP. So this system can be widely used in large amount data acquisition systems, such as a sonar array, multi point vibration measurement or electric power system monitoring, etc.