Ultrasonic ranging system
US4701893A · kind A · utility
23Cited by
8References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 16, 1986 |
| Grant date | Oct 20, 1987 |
| Priority date | — |
| Expiry date | May 16, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S367/903
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An ultrasonic ranging system includes transformer means with a transformer which is selectively energized to produce a transducer drive signal. An ultrasonic transducer transmits an ultrasonic pulse in response to the drive signal and develops an echo signal upon receipt of an echo pulse derived from the ultrasonic pulse; a shunt switch is connected across a winding of the transformer and is selectively closed to quickly damp the ringing following the transmission of an ultrasonic pulse to a level substantially below the level of the echo signal to permit close ranging.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.