Method to improve accuracy in delay lines

Details Method to improve accuracy in delay lines Method to improve accuracy in delay lines

1986-03-07

1987-10-20

Levy, Stewart J.

Measuring and testing

Vibration

By mechanical waves

73 1DV, G01N 2900, G01L 2500

Patent

active

047005734

ABSTRACT:
The errors in phase produced by differences in the locations of taps on a delay line are compensated by determining the error by transmitting oscillations from a test oscillator through each tap and storing the difference between the actual phase and the ideal phase that would result if the taps were perfectly located. When an ideal delay is called for, the tap having the closest actual delay to the ideal delay is selected and the proper phase correction is made.

REFERENCES:
patent: 4140022 (1979-02-01), Maslak
patent: 4334432 (1982-06-01), Gill
patent: 4446740 (1984-05-01), Wilson et al.
Rumbold, "A New Approach to Calibrating for Distance Amplitude Correction and Ultrasonic Inspection", Technical Paper, 1979.

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