摘要
设计了一种基于FPGA的高速多通道数据采集系统,该系统通过FPGA进行数字信号处理,使用AD9257作为多通道模数转换器,具有低功耗,低成本,数据实时采集,上位机交互控制等特点。测试结果表明,该系统可以用于微剂量探测器的输出信号的处理,分析引起探测器输出信号失真的物理机理,可以校正因脉冲堆积、系统噪声、ADC采样频率和精度、信号串扰及通道间参数差异等因素引起的频谱数据不确定度等。此系统对于微剂量探测器输出信号的处理具有应用价值。
A high-speed multi-channel data acquisition system is designed based on FPGA. The system completes digital signal processing through FPGA, AD9257 is used as multi-channel AD converter, it is with low power consumption, low cost, can do data real-time acquisition, and PC interactive control. The system hardware circuit of each function module is introduced in detail. Test results show that the system can be used in small doses of the detector output signal processing, analyze the physical mechanism of the detector output signal distortion. Noise yielded by pulse accumulation, system, ADC sampling frequency and parameter difference can be eliminated. This system has application value for micro dose detector output signal processing.
出处
《实验室研究与探索》
CAS
北大核心
2016年第12期54-56,共3页
Research and Exploration In Laboratory
基金
国家自然科学基金资助项目(61473237)
关键词
模数转换
多通道
微剂量探测器
FPGA
analog to digital conversion
multi-channel
mierodosing detector
FPGA
