Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Poclain SA
Original Assignee
Poclain SA
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Filing date
Publication date
Application filed by Poclain SAfiledCriticalPoclain SA
Priority to FR7435470ApriorityCriticalpatent/FR2259358A1/fr
Publication of FR2259358A1publicationCriticalpatent/FR2259358A1/fr
Application grantedgrantedCritical
Publication of FR2259358B1publicationCriticalpatent/FR2259358B1/fr
G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
G01H3/00—Measuring characteristics of vibrations by using a detector in a fluid
G01H3/04—Frequency
G01H3/06—Frequency by electric means
Landscapes
Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
Measurement Of Mechanical Vibrations Or Ultrasonic Waves
(AREA)
FR7435470A1974-10-221974-10-22Vibration frequency measuring method - uses microphone for sensing and circuit for discriminating and counting peaks
GrantedFR2259358A1
(en)