发明授权
- 专利标题： Beat frequency motor position detection scheme for tuning fork gyroscope and other sensors
- 专利标题（中）： 音叉电机位置检测方案用于音叉陀螺仪等传感器
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申请号： US541079申请日： 1995-10-11
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公开(公告)号： US5747961A公开(公告)日： 1998-05-05
- 发明人: Paul A. Ward , Anthony S. Kourepenis
- 申请人： Paul A. Ward , Anthony S. Kourepenis
- 申请人地址： MA Cambridge
- 专利权人： The Charles Stark Draper Laboratory, Inc.
- 当前专利权人： The Charles Stark Draper Laboratory, Inc.
- 当前专利权人地址： MA Cambridge
- 主分类号： G01C19/5719
- IPC分类号： G01C19/5719 ; G01P15/14
摘要：
A tuning fork gyroscope has an in-plane position sensitive pick-off to which an AC or AC+DC bias is applied. Intermodulation is exploited to produce beat-notes between the applied frequency and the motor frequency at amplitudes proportional to motor amplitude, but unaffected by error sources such as spurious substrate charge accumulation. The beat-notes are used to control motor amplitude without the effects of charge accumulation.