Ultrasonic instrument with time and amplitude gate bar display
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United States of America Patent
Stats
-
Feb 21, 1984
Grant Date -
N/A
app pub date -
Jul 26, 1982
filing date -
Oct 5, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An ultrasonic test instrument includes a pulse generator, a receiver, a cathode ray tube screen display and a time gate means providing a gated time interval for viewing only echo signals which arise from a predetermined workpiece region under test. The time gated interval is shown as a horizontal gate bar display on the screen and the length of the bar being indicative of the gated time interval. Circuitry provided generates a reference signal to cause the gate bar to appear at a height commensurate with the echo signal received in the gated intervals having the highest peak amplitude. Unless reset, the amplitude of the gate bar remains at this peak value although subsequent echo signals may have a lower amplitude.
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