发明名称 |
Method or generating a rotating elliptical sensing pattern |
摘要 |
A method of increasing the spatial resolution of polar coordinates sensor devices by phase-amplitude modulating the sine-cosine excitation signals to the hollow toroid driving core. A rotating elliptical sensing pattern is generated by digital synthesis means. Values of the elliptical sensing pattern and its complete revolution are stored in digital "look-up" tables and sequentially read at a high rate into two digital-to-analog converters to produce two "staircase" approximations of the sine-cosine waveforms. The ellipse generation has a first angular frequency and the ellipse precession has a second sub-multiple frequency.
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申请公布号 |
US5793204(A) |
申请公布日期 |
1998.08.11 |
申请号 |
US19960599775 |
申请日期 |
1996.02.12 |
申请人 |
LOGUE, DELMAR L. |
发明人 |
LOGUE, DELMAR L. |
分类号 |
G01B7/00;G01N27/72;G06F1/02;H03B28/00;(IPC1-7):G01N27/72 |
主分类号 |
G01B7/00 |
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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