基于PXIe的EPS试验台多通道数据采集系统设计  

Design of Multi-channel Data Acquisition System for EPS Test Bench Based on PXIe

作　　者：卢俊杰 罗哉[1] 郑永军[1] 郭斌[1,2] 胡晓峰 LU Jun-jie;LUO Zai;ZHENG Yong-jun;GUO Bin;HU Xiao-feng(China Jiliang University,Hangzhou 310018,China;Hangzhou Wolei Intelligent Technology Co.,Ltd,Hangzhou 310018,China)

机构地区：[1]中国计量大学,浙江杭州310018 [2]杭州沃镭智能科技股份有限公司,浙江杭州310018

出　　处：《仪表技术与传感器》2022年第9期57-61,共5页Instrument Technique and Sensor

基　　金：国家自然科学基金(52075511);浙江省科技计划项目(2021C01136);浙江省公益性技术应用研究计划(LGG21E050019)。

摘　　要：针对汽车EPS试验台设计中对测试系统成本、通道数量和大容量高速传输的需求,设计了基于PXIe总线和FPGA控制的32通道数据采集系统。系统采用10 MSPS的模数转换器进行采样,FPGA进行控制和数据处理,利用DDR3进行512 MB容量缓存,最后通过PXIe总线传输至工控机。文中对系统硬件电路和FPGA逻辑设计作了阐述,对数据采集系统的性能进行测试,结果表明系统采样精度优于0.1%,带宽190 kHz,在带宽范围内信噪比约为55 dB,有效位接近9 bit,具有较高性价比。Aiming at the requirements of test system cost,number of channels and large-capacity high-speed transmission in the design of automotive EPS test bench,a 32-channel data acquisition system based on PXIe bus and FPGA control was designed.The system used 10 MSPS analog-to-digital converter for sampling,FPGA for control and data processing,DDR3 for 512 MB cache,and finally transmitted to the industrial computer through the PXIe bus.The paper expounded the hardware circuit design and FPGA logic design,and tested the performance of the system.The results show that the sampling accuracy of the system is better than 0.1%,the bandwidth is 190 kHz,the SNR is about 55 dB and the ENOB is close to 9 bit in the bandwidth,which has a relatively high cost performance.

关 键 词：EPS试验台 ADC 多通道数据采集 FPGA PXIe XDMA 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]