Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1975-09-22
1977-06-07
Corcoran, Robert J.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
333 30M, G01R 3312
Patent
active
040286193
ABSTRACT:
Apparatus for gauging location of a movable element in relation to an end of an elongated impulse wave energy propagative member employing a sensing transducer adjacent one end of the member to sense first the direct impulse and thereafter the indirect impulse that is reflected from the opposite end. Processing of the sensing transducer responses and sequentially programmed digital measurement of time intervals associated with the duration and time relationship of such responses according to logic equations affords the desired location indication with automatic compensation for ambiently caused variations in shock wave propagation velocity in the member on repeating cycles of operation and with measurement accuracy independent of undue precision requirements in location of the sensing transducer in relation to the adjacent end of the member.
REFERENCES:
patent: 2656714 (1953-10-01), Cartier
patent: 3423673 (1969-01-01), Bailey et al.
patent: 3898555 (1975-08-01), Tellerman
Bradburd, E. M.; Magnetostructive Delay Line; Elec. Comm.; Mar. 1951; pp. 46-53.
Corcoran Robert J.
CX Corporation
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