Enhancement of linear scan ultrasonics
US4640132A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 15, 1985 |
| Grant date | Feb 3, 1987 |
| Priority date | — |
| Expiry date | Jan 15, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/044
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An ultrasonic testing method and apparatus stores the reflected ultrasonic signals from each of a plurality of locations along a scan path over a piece of material to be tested. For each individual location, the reflected signal at that location is added to contributing signals from each other location to produce a composite signal which has a good signal-to-noise ratio. The contributing signals from each other location is formed by multiplying the signal of those other locations by a corrective phase shift factor which is a characteristic of a time delay for a reflected signal from the other locations to the individual location of interest. The contributing signal from each other location thus represents a rotated reflected signal from the other locations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.