A Study of Improving the Position Accuracy of Magnetic Scale

• Main Authors: Hui-chun Lai, 賴惠君
• Other Authors: Der-Yuh Lin
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/73405339238503574160

碩士 === 國立彰化師範大學 === 電子工程學系 === 102 === Due to output of the analog sinusoidal signal is usually a non-ideal from magnetic encoder sensing。There generally exist variations of amplitude, phase .and DC level for the sinusoidal waveforms detected from the magnetic encoder 。 Therefore this study will regarding to sinusoidal signals for signal processing and compensation。When the magnetic encoder to sense the magnetic field to generate SIN and COS wave，signal after the amplifier and filter circuit to avoid noise is amplified along with instability caused by signal。 After the amplifier and filter The orthogonal sinusoidal signals are converted into digital signal output by using A / D converters of the DSP chip。When signal passes through the DSP at the same time can reach to stable state by adding the soft ware to adjust the compensation mechanism。 The stable signal is then processed by the fine segmentation to enhance the accuracy of the signal，and make the magnetic position feedback system meet the demand for high accuracy Finally also can replace the low-level optic encoder , So that magnetic position feedback system will be beneficial and more widely accepted for industrial applications。