Ultrasonic measuring apparatus for measuring a predetermined boundary surface inside an object
US4953405A · kind A · utility
17Cited by
3References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 28, 1989 |
| Grant date | Sep 4, 1990 |
| Priority date | — |
| Expiry date | Mar 28, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/044
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An ultrasonic measuring method and an ultrasonic measuring apparatus utilize the level of a reflected ultrasonic reception signal coming from an object to be examined as measurement data after the level has been provided with either a positive or a negative sign in accordance with the phase of the reception signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.