B型超声射频信号高速数据采集系统设计

Design of a High-speed Data Acquisition System for Sampling the B-mode Ultrasound RF Signal

为了取得B型超声系统的射频超声波信号,设计了基于PCI局部总线的高速数据采集系统。系统采用PLX公司的总线加速器PCI9054作为PCI的接口芯片;ADC采用AD9283,峰值采样可以达100 MB/S;用两片FIFO作为数据缓冲器。采用DMA方式读取FIFO里的数据。读取的数据以一定的格式保存,是进行各种超声射频信号处理的原始数据源。

A high-speed data acquisition system based PCI local bus is designed in order to obtaining the B-mode ultrasound RF signal. The system uses the PCI9054 I/O accelerator as the PCI interface chip and uses two FIFO chips as data buffers. ADC is the AD9283, which is an 8-bit monolithic sampling analog-to-digital converter, 100MSPS conversion rate, The data is transmitted from the FIFOs to PC by DMA mode. The data is stored by some format,which is used as the original data for processing the B-mode ultrasound RF signal.