Ultrasonic sensing
US4773267A · kind A · utility
12Cited by
21References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 22, 1982 |
| Grant date | Sep 27, 1988 |
| Priority date | — |
| Expiry date | Mar 22, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/02836
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An ultrasonic device in which a concave transducer, partially surrounded by and insulated from a pair of electrically-grounded shields, focuses a signal and directs it to a limited portion of a second lens which further focuses the signal and directs a highly concentrated signal into a fluid, whereby particles therein can be detected with increased sensitivity, and whereby the composition of a homogeneous fluid can be determined by measuring the amount of the attenuation or the sound velocity of ultrasonic pulses therethrough or by comparing the frequency spectrum of the pulse with known spectra.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.