Enhancement of linear scan ultrasonics

Details Enhancement of linear scan ultrasonics Enhancement of linear scan ultrasonics

1985-01-15

1987-02-03

Birmiel, Howard A.

Measuring and testing

Vibration

By mechanical waves

73620, 73628, G01N 2904

Patent

active

046401326

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.

REFERENCES:
patent: 3651451 (1972-03-01), Ruehle
patent: 3794827 (1974-02-01), Widess
Reflection Seismology, Waters, 1981, John Wiley & Sons, pp. 285, 193, 194-196.

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