Method and apparatus for measuring time interval between two pul

Details Method and apparatus for measuring time interval between two pul Method and apparatus for measuring time interval between two pul

1976-10-26

1978-03-14

Tokar, M.

Electricity: measuring and testing

Electrical speed measuring

Including 'event' sensing means

324187, 328129, 235 92T, G04F 800

Patent

active

040793150

ABSTRACT:
The time interval between two consecutive pulse signals, as occurring for instance in nondestructive ultrasonic pulse-echo testing, is measured by measuring with a counting frequency the width of the interval start pulse signal and the width of the interval stop pulse signal at respective base lines, and the time interval between both stated signals. Using either two different counting frequencies having a ratio of two to one, or utilizing summing and dividing means the time interval between the start and the stop pulse signals is determined with negligible error.

REFERENCES:
patent: 3713136 (1973-01-01), Nagy, Jr.
patent: 3728626 (1973-04-01), Douglas et al.
patent: 3731194 (1973-05-01), Favin
patent: 3983481 (1976-09-01), Nutt et al.

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