基于FPGA的千通道压电陶瓷控制系统  

Thousand-channel Piezoelectric Ceramic Control System based on FPGA

作　　者：吕才玉 李学华[1] 王俊 邱国星 许洋 LV Caiyu;LI Xuehua;WANG Jun;QIU Guoxing;XU Yang(College of Electronic Engineering,Chengdu University of Information Technology,Chengdu 610225,China;Chengdu Yuanwang Technology Co.,Ltd,Chengdu 610101,China)

机构地区：[1]成都信息工程大学电子工程学院,四川成都610225 [2]成都远望科技有限责任公司,四川成都610101

出　　处：《成都信息工程大学学报》2024年第3期268-274,共7页Journal of Chengdu University of Information Technology

基　　金：四川省自然科学基金资助项目(2022NSFSC0214)。

摘　　要：针对微位移压电陶瓷驱动器并行控制系统电路结构复杂、成本高、通道数少等缺点,设计一种采用少量D/A转换芯片和高压模拟开关进行循环通道切换的千通道压电陶瓷控制系统。考虑硬件设计和结构安装等系统性问题,采用12个驱动板和1个主控板的设计架构,每个驱动板以4片、16位AD766模数转换芯片和12片MAX14802高压模拟开关芯片为核心,实现192个通道模拟电压输出,12个驱动板组合成2304个通道的输出;主控板作为通信和控制核心,以Artix7系列FPGA芯片为主控芯片,接收上位机发送的数据和命令,并行控制数模转换以及千通道的切换。通过设计与验证,整个系统工作稳定,每个通道的模拟电压绝对误差均小于0.1 V,相对误差百分比优于1.2%。目前系统已成功应用于某光学系统的压电陶瓷位移控制中,该系统通过驱动板的扩展,也可实现上万通道的控制输出。Aiming at the disadvantages of the micro-displacement piezoelectric ceramic driver parallel control system,such as complex circuit structure,high cost,and small number of channels,A thousand-channel piezoelectric ceramic control system using a few D/A converter chips and high voltage analog switch for cyclic channel switching is designed.Considering the systematic problems such as hardware design and structural installation,the system adopts the design architecture of 12 driver boards and 1 main control board.Each driver board takes 4,16-bit AD766 analog-to-digital conversion chips and 12 MAX14802 high-voltage analog switch chips as the core to achieve 192 channels of analog voltage output.12 drive boards combined to produce 2304 channel outputs;The main control board as the communication and control core,Artix7 series FPGA chip as the main control chip,receiving data and commands sent by the host computer,parallel control of digital-to-analog conversion and thousand channel switching.Through design and verification,the whole system works stably.The absolute error of analog voltage in each channel is less than 0.1V,and the relative error percentage is better than 1.2%.At present,the system has been successfully applied to the piezoelectric ceramic displacement control of an optical system.The system can also realize the control output of tens of thousands of channels through the expansion of the drive plate.

关 键 词：FPGA 千通道 压电陶瓷 循环切换 

分 类 号：TN492[电子电信—微电子学与固体电子学]