Implementation of Fixed Sampling Period M/T Method Based on VHDL

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Abstract:

Take insufficiency of classical velocity measurement methods into consideration, this paper introduces a method which has a good test accuracy in a wide range, fixed sampling period M/T method, to determine velocity and position information of the encoder. Firstly, its measurement principle is analyzed in detail through logic and timing relationship. Then realization of every module is achieved with VHDL. Finally, ModelSim is used to simulation and test to verify the correctness of the method. In the future, it can be widely used in practical applications.

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1180-1183

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November 2012

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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[1] Y. Zhao. Research of encoder velocity measurement (MS., Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, China 2002).

Google Scholar

[2] Y. He, Y.K. Fan, T. Wang and R.J. Wang. Counting Circuit Design of Incremental Optical Encoder Based on FPGA: Electronic Instrumentation Users, Vols. 90-92(2008) 15(3).

Google Scholar

[3] Z.D. Shi, P.Z. Chen, D.J. Chen, X.K. Wang and C.Y. Liu. High Resolution Digital Velocity Detection and Dynamic Position Detection Methods: Tsinghua Univ (Sci &Tech), Vol. 44(2004) No. 8, pp.1021-1024.

Google Scholar

[4] X.A. Li and X.J. Li. A high Accuracy Tachometer Card Based on FPGA and PCI Lacal Bus: Modern Electronics Technique, Vols. 131-134(2010) 33(21).

Google Scholar

[5] Richard C. Kavanagh. An Enhanced Constant Sample-time Digital Tachometer Through Oversampling: Transactions of the Institute of Measurement and Control, Vols. 83-98(2004) 26(2).

DOI: 10.1191/0142331204tm114oa

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