| 摘要 |
An impact detector includes a first determination unit operable to determine whether or not an absolute value of an acceleration in a direction of Y axis exceeds 1 G, and an impact determination unit operable to output a predetermined impact detection signal which indicates detection of impact in a direction of Z axis in response to an absolute value of an acceleration in a direction of X axis exceeding 1 G within a predetermined time period T after the first determination unit determines that the absolute value of the acceleration in the direction of Y axis exceeds 1 G.
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