Apparatus for examining an object by ultrasonic echography
US4680966A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 10, 1985 |
| Grant date | Jul 21, 1987 |
| Priority date | — |
| Expiry date | Jun 10, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S15/8915
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for examining objects by ultrasonic echography comprising an ultrasonic transmitting transducer (10) and an ultrasonic receiving transducer (20), with which are associated a transmitter stage (30), a receiver stage (40) constituted by a channel (100) for processing the echo signals reflected to the receiving transducer by the obstacles they meet in the said region and a storage and/or visualization stage (60), characterized in that the transmitting transducer (10) is at the same time a receiver and in that the receiver stage (40) also comprises a channel (200) for processing the output signals of the said transmitting/receiving transducer (10) thus formed and a subtraction device (500), whose output is connected to a first input (560) of the storage and/or visualization stage and whose two inputs receive the output signals of the said channels (100) and (200) representative of the real and theoretical travelling times, respectively, between the transducers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.