Method for pulse triggering of a piezo-electric sound-transmitting transducer
US4376255A · kind A · utility
13Cited by
6References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 18, 1981 |
| Grant date | Mar 8, 1983 |
| Priority date | — |
| Expiry date | Feb 18, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/524
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A piezoelectric ultrasonic transducer is triggered by a predeflection of the transducer in a first direction with a square-wave pulse or a saw-tooth pulse which has a rapidly dropping trailing edge to effect deflection in the opposite direction, with an overshoot. At the maximum point of overshoot, an alternating triggering voltage, preferably in the form of a pulse sequence, is applied to energize and maintain the transducer in resonance oscillation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.