发明名称 |
Absolute position detection apparatus and error compensation methods therefor |
摘要 |
An absolute position detection apparatus which comprises sine and cosine wave generators for generating one or more sets of sine and cosine waves within a cycle, analog-to-digital converters for converting the incoming sine and cosine waves generated by the sine and cosine wave generators into digital values. An arithmetic unit is used for calculating a compensation for errors including offset, amplitude and phase errors on the basis of the digital values from the analog-to-digital converters. In the apparatus, the arithmetic unit operates on a phase angle from phase angles found by the arithmetic performed prior to or during said error compensations and the digital values from the analog-to-digital converters, whereby a low-priced, highly reliable absolute position detection apparatus can be achieved without the addition of compensation circuits to the hardware.
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申请公布号 |
US5677686(A) |
申请公布日期 |
1997.10.14 |
申请号 |
US19950379739 |
申请日期 |
1995.01.27 |
申请人 |
MITSUBISHI DENKI KABUSHIKI KAISHA |
发明人 |
KACHI, MITSUYASU;SAKUMA, HIROKAZU;KAZAMA, TSUTOMU;AOKI, YUKIO;MIZUTANI, TAKAO |
分类号 |
G01D5/244;G01D5/245;H03M1/64;(IPC1-7):H03M1/00 |
主分类号 |
G01D5/244 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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