| 摘要 |
PROBLEM TO BE SOLVED: To provide an acceleration history recording device at the time of falling for certificating a fact of the falling thereafter by detecting the falling of a device itself and providing a function for recording the history of an acceleration until it falls and collides. SOLUTION: The acceleration history recording device comprises a three-axes acceleration sensor for outputting high sensitivity detection output and low sensitivity detection output, a falling determining means for determining the falling on the basis of the high sensitivity detection output of the acceleration sensor, and a non-volatile semiconductor memory. When the falling determining means determines that it is during falling, data concerning the low sensitivity detection output of the acceleration sensor are recorded to the non-volatile semiconductor memory for a short time. COPYRIGHT: (C)2005,JPO&NCIPI
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