基于ZYNQ的双ADC数据采集系统的设计与实现

Design and implementation of double ADC data acquisition system based on ZYNQ

目前使用的毫米波雷达主要采用线性调频连续波的方式,该调制方式短时间内会产生海量数据,对采集系统的实时传输要求严格。另外,市场上没有合适的24 GHz毫米波雷达采集系统的采集板卡。针对上述问题,文中提出一种基于ZYNQ的8通道毫米波雷达高速数据采集系统。整个采集系统将ZYNQ芯片作为主控,通过串行外设接口控制24 GHz毫米波射频前端;内部通过状态机控制2颗AD9228芯片构成4组正交采集通道;上位机通过串行接口控制该采集系统,实现千兆网口完成ADC采集之后的数据传输,同时上位机采用多进程方式对数据进行接收处理,并将目标信息实时显示。实际测试结果表明:文中系统能够完成实地数据采集及传输,网络传输平均速率为150 Mb/s,丢包率为0;相比于其他现成采集系统,能够有效降低二次开发的难度,可为后期算法处理提供一套小体积、低功耗的数据采集系统。

At present,the millimeter wave radar mainly adopts the mode of linear frequency modulation continuous wave,which will produce a large amount of data in a short time,and has strict requirements on the real⁃time transmission of the acquisition system.However,there is no suitable acquisition boards for the 24 GHz millimeter wave radar acquisition system in the market.On this basis,an 8⁃channel millimeter⁃wave radar high⁃speed data acquisition system based on ZYNQ is proposed.In the entire acquisition system,the ZYNQ chip is taken as the main control one to control the 24 GHz millimeter⁃wave ratio frequency front⁃end by means of the serial peripheral interface.In the internal of the system,the state machine is used to control two AD9228 chips to form four sets of orthogonal acquisition channels.An upper computer is used to control the acquisition system through a serial interface to realize the data transmission of Gigabit Ethernet port after ADC acquisition,receive and process the data in the multi⁃process mode,and display the target information in real time.The actual testing results show that the system can complete collection and transmission of field data,the average transmission rate of the network can reach 150 Mb/s,and the packet loss rate is 0.In comparison with other ready⁃made collection systems,this system can effectively reduce the difficulty of secondary development and provide a small volume and low power consumption data acquisition system for later algorithm processing.