国产FPGA增量式光栅尺信号采集系统的设计  被引量:3

Design of Domestic Incremental Grating Ruler Signal Acquisition System Based on FPGA

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作  者:张晰 姜元 姜润强[1] 韩庆阳[1] ZHANG Xi;JIANG Yuan;JIANG Runqiang;HAN Qingyang(Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Science,Changchun 130033,China)

机构地区:[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033

出  处:《仪表技术与传感器》2023年第8期75-78,87,共5页Instrument Technique and Sensor

基  金:国家自然科学基金(62075216)。

摘  要:针对光学调焦平台的增量式光栅尺信号采集系统,提出了基于国产FPGA芯片AG10K的设计,实现增量式光栅尺的倍频鉴向、脉冲计数、串口数据传输等功能,通过串口通信实现上位机的通信交互,完成对光学调焦平台的精确位置采集显示。设计了滤波算法对假零位信号进行滤波处理,并对分频计数逻辑进行正反双脉冲处理,有效降低噪声对零位和计数模块的干扰,保证了采集算法的准确性。实验表明:该系统能够实现高精度、高灵敏度的位移量检测和调节功能。该系统具有响应速度快、精度高、稳定可靠等优点,采用国产化芯片使该采集系统具有广泛适用性。Aiming at the incremental grating ruler signal acquisition system of optical focusing platform,a design based on the domestic FPGA chip AG10K was proposed to realize the functions of frequency doubling directional discrimination,pulse counting,serial data transmission and so on.The communication interaction of host computer was realized through serial communication,and the accurate position acquisition and display of optical focusing platform was completed.The filter algorithm was designed to filter the false zero signal,and the positive and negative double pulse processing was carried out on the frequency division counting logic,which can effectively reduce the interference of noise to the zero and counting module,and ensure the accuracy of the acquisition algorithm.Experiments show that the system can detect and adjust the displacement with high precision and sensitivity.The system has the advantages of fast response speed,high precision,stability and reliability.The adoption of domestic chip makes the acquisition system have wide applicability.

关 键 词:国产化 FPGA 增量式光栅尺 数据采集 

分 类 号:TN929.5[电子电信—通信与信息系统]

 

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