Method and apparatus for generating monopulse ultrasonic signals
US4507762A · kind A · utility
7Cited by
4References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 24, 1982 |
| Grant date | Mar 26, 1985 |
| Priority date | — |
| Expiry date | Sep 24, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K15/00
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A method of transmitting half-sinewave ultrasonic monopulses utilizes a flip-flop (22) to reverse the states of a bridge circuit (Q.sub.1 -Q.sub.4) with each output pulse from a timing pulse generator (20). This reverses the polarity of a dc voltage which stresses a piezoelectric transducer (24) to substantially its limit. Each pulse from the timing generator thus causes one mechanical transition of the transducer and clamps it in its reversed stress condition, thereby producing a half-sinewave ultrasonic output for each timing pulse.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.