| 摘要 |
An object detecting apparatus includes a piezoelectric sensor provided at an edge portion of an opening/closing body for emitting an output voltage which changes corresponding to an external force applied to the edge portion and a detection circuit for receiving the output voltage of the piezoelectric sensor and for judging an entrapment. The detection circuit includes a voltage-measuring circuit for measuring the output voltage of the piezoelectric sensor, a time-measuring circuit for measuring time, and a judging circuit configured to judge the entrapment. The judging circuit judges the entrapment corresponding to the output voltage of the piezoelectric sensor. The judging circuit calculates a changing value of the output voltage after the output voltage of the piezoelectric sensor reaches a predetermined first level. The judging circuit judges that the entrapment has not occurred in a situation where the changing value of the output voltage is larger than a predetermined value.
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