现代科学仪器Issue(1)：56-60,5.
电磁探伤系统中FPGA同步采样系统设计
The Design of Synchronized FPGA Sampling System in Electromagnetic Defect Inspection System
摘要
Abstract
In online rail flaw detection, we need the synchronal detection of electromagnetic projection incentives and weak magnetic signal in high speed condition. Due to the limitations of the current multi-channel synchronal data acquisition system, we chosed Virtex-5 family of FPGA as the core control module, used the AD7760 ∑-△analog to digital converter chip to achieve the accuracy with 24 bit, the maximum sampling rate was up to 20M synchronous acquisition system. This paper presented a multi-channel high-speed synchronous acquisition system architecture and control theory, analyzed the status of the data acquisition system in the current. Aiming at the unreasonable problems of acquisition and transmission speed, resource utilization, and the high cost in high-speed data acquisition system, we proposed a synchronal acquisition method. The realization results showed that the method realizes multi-channel, high-resolution, parallel A/D synchronal acquisition, meets the demand of the synchronal detection of electromagnetic projection incentives and weak magnetic signal in high-speed case.关键词
FPGA/高速采集/同步Key words
FPGA/High-speed acquisition/Synchronous分类
信息技术与安全科学引用本文复制引用
谢景磊,程轶平,朱雳雄,余浩,刘泽..电磁探伤系统中FPGA同步采样系统设计[J].现代科学仪器,2013,(1):56-60,5.基金项目
国家自然基金资助项目(NSFC No.61050001) （NSFC No.61050001）
