发明名称 |
Encoder signal analysis system for high-resolution position measurement |
摘要 |
An apparatus and method for identifying the position of a magnetic shaft are provided. N field sensors are adjacently positioned at fixed locations relative to the shaft's periodic field, corresponding to 180/N relative phase shifts. A table provides N>2 predetermined signal models and a pre-identified position associated with each. An interpolator compares a representation of the N measured sensor signals to at least two predetermined models to generate a correction signal that provides another pre-identified position. The correction signal depends on N sensors for every position of the shaft. The correction signal is used to incrementally choose said another pre-identified position from the table as an approximate position of the shaft in an iterative process to find the minimum correction signal and identify the position.
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申请公布号 |
US2007205736(A1) |
申请公布日期 |
2007.09.06 |
申请号 |
US20070702783 |
申请日期 |
2007.02.05 |
申请人 |
CALIFORNIA LINEAR DEVICES, INC. |
发明人 |
LINDBERG PAUL M.;SCHULTZE GARY;HOLLINGSWORTH PHILLIP |
分类号 |
H02P5/00 |
主分类号 |
H02P5/00 |
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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