Apparatus for ultrasonic scanning
US4458533A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 21, 1981 |
| Grant date | Jul 10, 1984 |
| Priority date | — |
| Expiry date | May 21, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/5206
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In an exemplary embodiment, a transducer element row W.sub.1 through W.sub.m has a signal delay device for the delay of arriving echo signals in such a manner that phase balance of the individual signals result at the output. It is the objective of the disclosure to construct such an apparatus with which, given a specified number of transducers, the grating lobes in the directional response of the antenna are eliminated, and nevertheless the electronic outlay can be kept within boundaries. This objective is achieved in that the signals are transmitted, in groups, respectively, by the delay device to individual adders whose output signals are linked in a unit for quasi-multiplicative processing. In the case of digital technique, through binary signal processing, a considerable simplification results accompanied by the elimination of the interfering directional response of the resolution capability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.