DEVICE FOR MEASURING ACOUSTIC RESONANCE FREQUENCIES OF SPECIMENS UNDER TEST IN AUTO-OSCILLATION MODE Russian patent published in 1996 - IPC

Abstract RU 2054667 C1

FIELD: measurement technology. SUBSTANCE: device has frequency measuring unit, oscillation amplitude indication unit and oscillation circuit having emitting and receiving oscillation transformers acoustically bound with the specimen under test, amplifier and phase rotation unit. The amplifier has transfer function of the form , where U_out and U_in are signal amplitudes on the output and input, respectively, n is the odd integer number being greater than 1. EFFECT: enhanced accuracy of measurements. 2 dwg

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RU 2 054 667 C1

Authors

Barkhatov Vladimir Al'Bertovich

Dates

1996-02-20—Published

1992-12-21—Filed