一种256路高精度实时信号采集系统的设计

Design of 256-channle High-precision Real Time Signal Acquisition System

针对在大型计算机测量领域中对几十个,上百个节点信号进行高精度的实时采集测量的需要,提出一种基于DSP和AD7767的256路信号采集系统设计方案,解决现存的采集系统通道数不够、精度低、成本高等问题;系统运用TMS320C6747为微处理器,24位高分辨率、高精度的AD7767为数据采集A/D转换器,以ADG706为多路信号采集选择器,通过硬件电路设计和软件编程实现了高精度256路信号实时采集;系统在实际工程应用中采集精度高、功耗低、稳定性好,具有一定的实用价值。

Aiming at the need of high-precision real-time acquire and test signals among dozens of and over a hundreds of points in large computer measurement field,256-channel signal acquisition system based on DSP and AD7767 is designed to solve the issues,such as no enough acquisition channels,low precision and high costs,etc.By using TMS320C6747 as MCU,24 bits of high resolution and high-precision AD7767 as data acquisition A/D converter,and ADG706 as multi-signal acquisition chooser,realizing high-accuracy 256-channel signal real-time data acquisition by designing the hardware circuit and programming the software.The system in practical engineering application have characteristics of high-precision,low power consumption and good stability,and has some practical value.