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Hitachi Ltd
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Hitachi Ltd
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Application filed by Hitachi LtdfiledCriticalHitachi Ltd
Priority to JP4138077ApriorityCriticalpatent/JPS53126962A/en
Publication of JPS53126962ApublicationCriticalpatent/JPS53126962A/en
Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves
(AREA)
Abstract
PURPOSE: To provide gate signals of an optimum range irrespective of pipe diameters and eliminate noise by providing an initial setting circuit, an up-down counter, a control circuit and digital comparators to an acoustic signal supplying means.