Application of pseudo-random code in miniature absolute encoder chip

YIN Jing-zhi; YU Zhi-shuai; PENG Can; MU Yu-song; CHANG Yu-chun

doi:10.3788/OPE.20162413.0169

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Application of pseudo-random code in miniature absolute encoder chip

更新时间：2020-08-13

- Application of pseudo-random code in miniature absolute encoder chip
- Optics and Precision Engineering Vol. 24, Issue 10s, Pages: 169-174(2016)
- 作者机构：
  
  吉林大学电子科学与工程学院集成光电子学国家重点联合实验室,吉林长春,130012
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20162413.0169
  CLC： TP762;TP212.1
- Received：28 May 2016，
  
  Revised：18 June 2016，
  
  Published：14 November 2016
- 稿件说明：
移动端阅览
殷景志, 余芝帅, 彭灿等. 小型伪随机绝对式光电编码器芯片[J]. 光学精密工程, 2016,24(10s): 169-174

YIN Jing-zhi, YU Zhi-shuai, PENG Can etc. Application of pseudo-random code in miniature absolute encoder chip[J]. Editorial Office of Optics and Precision Engineering, 2016,24(10s): 169-174
殷景志, 余芝帅, 彭灿等. 小型伪随机绝对式光电编码器芯片[J]. 光学精密工程, 2016,24(10s): 169-174 DOI： 10.3788/OPE.20162413.0169.

YIN Jing-zhi, YU Zhi-shuai, PENG Can etc. Application of pseudo-random code in miniature absolute encoder chip[J]. Editorial Office of Optics and Precision Engineering, 2016,24(10s): 169-174 DOI： 10.3788/OPE.20162413.0169.

摘要

为了解决传统绝对式编码器体积大和精度低的问题，设计了一种基于M码伪随机序列的绝对式编码器芯片。在综合考虑各种绝对式编码方式优缺点的前提下，提出采用单圈M码道的设计，避免了传统的多圈绝对式编码器码道数目较多、尺寸较大的缺点，有利于绝对式编码器的小型化。接着，采用M码道与增量式精码道相配合的方式，利用芯片内部ADC对精码进行细分，在尽量避免外部噪声的前提下，将编码器的分辨率提高到19 bit。最后，针对编码器的细分误差，采用基于径向基神经网络的误差补偿算法，可以将编码器的细分误差降低2至3倍，有效提高了编码器的系统精度。仿真结果表明校正后系统的标准偏差为8.4"。该绝对式编码器体积小、精度高、可靠性高，具有一定的工程应用价值。

Abstract

To solve the problem of large volume and low precision for traditional absolute encoder

an absolute encoder chip based on the M-code pseudo-random binary sequence was designed. With overall consideration of advantages and disadvantages of absolute encoding mode

the sing M-code track was designed for avoiding the multi-track and large size of the traditional multi-loop absolute encoder track

thus realizing the miniaturization of absolute encoders. Subjected to the interpolation of the internal ACD

the combination of the M-code channel with the incremental precise-code channel can highly improve the resolution of the absolute encoder to 19 bit with a rather low external noise. Finally

an error compensation algorithm based on the neural-network were adopted to reduce the subdivision error by twice or three times

thus the system precision of the encoder was greatly improved. After compensation

the standard deviation of the encoder system is 8.4''. The absolute encoder can basically meet the requirements for small volume

high precision and high reliability

with certain engineering application values.

关键词

Keywords

references

左洋,龙科慧,刘金国,等. 非均匀采样莫尔条纹信号的分析与处理[J]. 光学精密工程,2015,23(4):1146-1152. ZUO Y, LONG K H, LIU J G, et al.. Analysis and processing of Morié fringe signals based on non-uniform sampling[J]. Opt. Precision Eng., 2015, 23(4):1146-1152. (in Chinese)

YE G, FAN S, LIU H, et al.. Design of a precise and robust linearized converter for optical encoders using a ratiometric technique[J]. Measurement Science and Technology, 2014, 25(12):125003.

高旭, 万秋华, 赵长海, 等. 莫尔条纹光电信号正交性偏差的实时补偿[J]. 光学精密工程, 2014, 22(1):213-219. GAO X, WAN Q H, ZHAO CH H, et al.. Real-time compensation of orthogonality deviation for Moire fringe photoelectric signal[J]. Opt. Precision Eng., 2014, 22(1):213-219. (in Chinese)

WU J, ZHOU T, YUAN B, et al.. Absolute angular encoder based on optical diffraction[C]. International Conference on Optical Instruments and Technology, 2015, 2015:962304-962304.

于海,万秋华,杜颖财,等. 光电编码器动态检测转台的空间矢量力矩合成驱动系统[J]. 光学精密工程,2014,22(4):979-987. YU H, WAN Q H, DU Y C, et al.. Drive system of dynamic detection equipment for photoelectric encoders using space-vector torque combination[J]. Opt. Precision Eng., 2014, 22(4):979-987. (in Chinese)

WATANABE T, KON M, NABESHIMA N, et al.. An angle encoder for super-high resolution and super-high accuracy using SelfA[J]. Measurement Science and Technology, 2014, 25(6):065002.

LANGE S, RIEDMILLER M. Deep auto-encoder neural networks in reinforcement learning[C]. Neural Networks (IJCNN), The 2010 International Joint Conference on IEEE, 2010:1-8.

王显军. 大型望远镜测角系统误差的修正[J]. 光学精密工程,2015,23(9):2446-2451. WANG X J.Correction of angle measuring errors for large telescopes[J]. Opt. Precision Eng., 2015, 23(9):2446-2451. (in Chinese)

ANISIMOV A G, PANTYUSHIN A V, LASHMANOV O U, et al.. Absolute scale-based imaging position encoder with submicron accuracy[J]. SPIE, 2013, 8788:87882T-87882T-5.

WANG H, WANG J, CHEN B, et al.. Absolute optical imaging position encoder[J]. Measurement, 2015, 67:42-50.

IWAI H, MITSUI K. Development of a measuring method for motion accuracy of NC machine tools using links and rotary encoders[J]. International Journal of Machine Tools and Manufacture, 2009, 49(1):99-108.

王显军. 光电轴角编码器细分信号误差及精度分析[J]. 光学精密工程, 2012, 20(2):379-386. WANG X J. Errors and precision analysis of subdivision signals for photoelectric angle encoders[J].Opt. Precision Eng., 2012, 20(2):379-386. (in Chinese)

JOHNSON N, MOHAN K J, JANSON K E, et al.. Optimization of incremental optical encoder pulse processing[C]. Automation, Computing, Communication, Control and Compressed Sensing (iMac4s), 2013 International Multi-Conference on., IEEE, 2013:769-773.

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