Object detecting switch device
US5008862A · kind A · utility
4Cited by
8References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 18, 1990 |
| Grant date | Apr 16, 1991 |
| Priority date | — |
| Expiry date | Jan 18, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S367/903
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A switch device is disclosed for detecting an object which comprises a transducer for emitting and receiving ultrasonic signals to and from an object, a transmitter for driving the transducer, a receiver for receiving a signal from the transducer, a gate for detecting a short-distant object, a gate for detecting a long-distant object, and a circuit for setting the timings of the gates in accordance with the detecting ranges of the object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.