基于PCI的超声采集卡设计  

Design of Data Acquisition Card for Ultrasonic Signal with PCI Bus

作　　者：杨泽宇[1] 张艳花[1] 杨录[1] 李文强[1] 

机构地区：[1]中北大学信息与通信工程学院,山西太原030051

出　　处：《山西电子技术》2012年第6期12-14,共3页Shanxi Electronic Technology

摘　　要：设计了一种采用PCI数据总线作为接口的超声数据采集卡。对回波信号采用了时间和幅值双特征提取处理,有效提高了缺陷的识别和定位。在数据存储方面,利用双RAM进行乒乓操作,实现了数据传输和数据采集同时处理,有效提高了超声数据处理的实时性。PCI总线传输采用DMA+中断的方式进行工作,稳定有效并满足了系统对超声数据传输的需求。A data acquisition card for ultrasonic signal based on PCI bus is designed. Time feature and amplitude characteristics of the echo signal with double feature is made by extraction process, it improves the identification and location of the defect effectively. In the respect of data storage, ping pong operation is used with dual ram, the data transmission and data acquisition are processed at the same time and effectively improves the real-time ultrasound data processing. PCI bus runs with the using of DMA ＋ interrupt, and it can stably and effectively meet the demand for ultrasound data transmission.

关 键 词：特征提取 PCI总线 超声检测 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]