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| 一种光栅信号细分算法的FPGA实现 | |
| 引用本文： | 胡晓东,彭琅,雷明,雷宇生,熊梦飞,熊慕雪.一种光栅信号细分算法的FPGA实现[J].光子学报,2014,40(3):407-412. |
| 作者姓名： | 胡晓东 彭琅 雷明 雷宇生 熊梦飞 熊慕雪 |
| 作者单位： | （1 中国科学院西安光学精密机械研究所,西安 710119） (2 中国科学院研究生院,北京 100049） (3 湖北航天飞行器研究所,武汉 430023) （4 航天科工九院 国营江北机械厂,湖北 孝感 432000） （5 北京师范大学 翰林实验学校,广东 东莞 523063） （6 沙市中学,湖北 荆州 434000） |
| 摘 要： | 提出了一种基于FPGA的光栅位移传感器信号细分处理技术,采用CORDIC（坐标旋转数字计算机）解算相位,同时结合单准确度浮点运算,将辩向、粗码计数、相位解算、粗码精码浮点运算集成于单片FPGA实现,保证了细分的准确度、细分数据的有效计算准确度及信号处理的速度.设计中采用Altera公司的Cyclone II_EP2C20F484C8型芯片进行验证,对20 μm栅距的光栅尺信号进行细分处理,实验结果证实了该方法的正确性和可行性. |
| 关 键 词： | 光栅位移传感器 FPGA 细分 CORDIC 浮点运算 |
| 收稿时间： | 2010-11-25 |
Realization of a Subdividing Method for Grating Signal Based on FPGA |
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| HU Xiao-dong,PENG Lang,LEI Ming,LEI Yu-sheng|XIONG Meng-fei,XIONG Mu-xue.Realization of a Subdividing Method for Grating Signal Based on FPGA[J].Acta Photonica Sinica,2014,40(3):407-412. | |
| Authors: | HU Xiao-dong PENG Lang LEI Ming LEI Yu-sheng|XIONG Meng-fei XIONG Mu-xue |
| Institution: | (1 Xi′an Institute of Optics and Precision Mechanics,Chinese Academy of Sciences,Xi′an 710119,China)（2 Graduate University of Chinese Academy of Sciences,Beijing 100049,China)（3 Hubei Institute of Aerospacecraft,Wuhan 430023,China)（4 SANJIANG Aerspace Group Jiangbei Machine Plant,Xiaogan,Hubei 432000,China)（5 Beijing Normal University HanLin Experimental school,Dongguan,Guangdong 523063,China)（6 ShaShi Middle School,Jingzhou,Hubei 434000,China) |
| Abstract: | A subdividing method for grating signal based on FPGA was proposed.The method uses CORDIC algorithms and single-precision floating-point calculation,which can implement the function of direction-judgement,counting,phase decoding by CORDIC algorithm,floating-point calculation between the two codes on a single FPGA.It can assure the subdivision accuracy,guarantee the effective calculation accuracy of subdivision data,and ensure the computational speed.The simulation was based on chip CycloneII-EP2C20F484C8 of Altera company,by subdividing the signal of grating with 2 μm length period.The result proves the feasibility and validity of this method. |
| Keywords: | Grating FPGA Subdividing CORDIC Floating-point calculation |
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