发明名称 |
ACTIVITY DETECTION IN MEMS ACCELEROMETERS |
摘要 |
<p>A method of detecting activity in a MEMS accelerometer captures an acceleration bias, measures acceleration at a predetermined time, calculates a change in acceleration using the measured acceleration and the acceleration bias, and compares the change in acceleration to a threshold to detect activity. A method of detecting inactivity uses a similar technique along with a timer. The method of detecting inactivity in a MEMS accelerometer captures an acceleration bias, measures acceleration at a predetermined time, calculates a change in acceleration using the measured acceleration and the acceleration bias, and compares the change in acceleration to a threshold to detect inactivity. The method further determines if the change in acceleration is less than the threshold and, if so, determines if a predetermined period of time has elapsed to detect inactivity.</p> |
申请公布号 |
WO2009117703(A1) |
申请公布日期 |
2009.09.24 |
申请号 |
WO2009US37879 |
申请日期 |
2009.03.20 |
申请人 |
ANALOG DEVICES, INC.;LEE, JAMES, M.;MEMISHIAN, JOHN |
发明人 |
LEE, JAMES, M.;MEMISHIAN, JOHN |
分类号 |
G01P15/08;G01P15/18;G11B19/04 |
主分类号 |
G01P15/08 |
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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