基于FPGA的X射线平板探测器信号采集系统设计  

Design of signal acquisition system for industrial X-Ray flat panel detectors

作　　者：郑海东 汤斌 任忠国 谢琳 杨森 李富迪 孙文遂 赵明富 张良 ZHENG Haidong;TANG Bin;REN Zhongguo;XIE Lin;YANG Sen;LI Fudi;SUN Wensui;ZHAO Mingfu;ZHANG Liang(School of Electrical and Electronic Engineering,Chongqing University of Technology,Chongqing 400054,China;College of Intelligent Science and Technology,Tianfu College of Swufe,Mianyang Sichuan 621000,China;Institute of Applied Electronics,China Academy of Engineering Physics,Mianyang Sichuan 621900,China;Zhongchuangzhike(Mianyang)Technology Co.,Mianyang Sichuan 621000,China)

机构地区：[1]重庆理工大学电气与电子工程学院,重庆400054 [2]西南财经大学天府学院智能科技学院,四川绵阳621000 [3]中国工程物理研究院应用电子学研究所,四川绵阳621900 [4]中创智科(绵阳)科技有限公司,四川绵阳621000

出　　处：《激光杂志》2024年第8期46-52,共7页Laser Journal

基　　金：国家自然科学基金项目(No.12005211)。

摘　　要：针对传统工业X射线平板探测器噪声高和像素低的问题,利用非晶硅薄膜晶体管(TFT)平板、亚德诺半导体(ADI)成熟的模数转换(ADC)芯片、奇景光电(Himax)公司的驱动模块和现场可编程门阵列(FPGA)设计了一种3072×3072像素的X射线平板探测器信号采集系统。本项目以ZYNQ7020为核心处理器进行电路设计,并实现FPGA的综合布局布线、仿真和调试,该系统在FPGA的控制信号作用下,实现了驱动模块控制TFT的开关、模拟前端(AFE)同时并行采集3072个通道的电荷信号,经过去噪、放大以及AD转换后数据在一个低压差分信号(LVDS)接口串行输出,最终成功得到采集信号,验证了系统的功能,可以为研究X射线探测器提供一种设计思路。To solve the problems of high noise and low pixel of traditional industrial X-ray flat-panel detector,a 3072×3072-pixel X-ray flat-panel detector signal acquisition system has been designed by using an amorphous silicon thin-film transistor(TFT)flat-panel,a mature analog-to-digital converter(ADC)chip of ADI,a driver module of Himax,and a field-programmable gate array(FPGA).This project takes ZYNQ7020 as the core processor for circuit design,and realizes the comprehensive layout and wiring,simulation and debugging of FPGA.The system,under the action of the control signal of FPGA,implements the driver module to control the switch of the TFT,the analogue front-end(AFE)to collect the charge signal of 3072 channels in parallel at the same time,and then the data is converted into the signal by denoising,amplifying,and AD conversion in a Low Voltage Differential signal(LVDS)interface serial output,and finally successfully obtained the acquisition signal,verified the function of the system,which can provide a design idea for the study of X-ray detectors.

关 键 词：FPGA X射线探测器 信号采集 模拟前端 模数转换 

分 类 号：TN911[电子电信—通信与信息系统]