Method of analyzing and evaluating the results of an ultrasonic examination
US4911014A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 22, 1988 |
| Grant date | Mar 27, 1990 |
| Priority date | — |
| Expiry date | Jul 22, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/044
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A prior art computerized ultrasonic examination is first performed by moving an ultrasonic probe over the surface of an object, emitting short pulses of ultrasonic energy into the material. Combined digital position and echo pulse signals are electronically stored, processed and used for the display of video images presenting accumulated echo amplitude data in circular patterns associated with selected sectional planes through the object. The results of the examination are then analyzed and evaluated by means of a mathematical model, able to produce imaginary digital data simulating the progression and reflection of sound pulses emitted by the ultrasonic probe. Imaginary echo signals from imaginary point reflection sources corresponding to selected individual flaw image pixels are then compared with the actual echo pulse signals electronically stored, and in cases of identical sound path lengths, the corresponding actual echo pulse signals are deleted from the memory. By such successive elimination of individual flaw echo signals from the totality of echo signals received, it becomes possible to analyze complex flaw combinations in successively revised sectional images, removing in…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.