Object detecting apparatus
US7330007B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 25, 2006 |
| Grant date | Feb 12, 2008 |
| Priority date | — |
| Expiry date | Jul 25, 2026 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2900/531
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.