Measuring and testing – Volumetric content measuring
Patent
1986-07-10
1987-11-10
Myracle, Jerry W.
Measuring and testing
Volumetric content measuring
73290V, G01F 1700
Patent
active
047049022
ABSTRACT:
The apparatus consists of a mechanical acoustical driver producing sound vibrations in a fluid, such as a liquid or gas, within an enclosed space. A pickup transducer positioned within the tank measures the sound vibrations of the gas within the tank and transmits the same to an amplifier and a low pass filter. Either the same or another transducer positioned in the tank measures static pressure P output of which is amplified. A divider circuit receives the dynamic pressure signal and static pressure signal and provides electrical signal E proportional to (.DELTA.P/P). A differential amplifier receives the reference signal Erf and the signal E and supplies the error signal (Erf-E) to a gain controlled amplifier. The gain controlled amplifier amplifies the AC signal proportional to (Erf-E). The driver generates .DELTA.P in the tank proportional to the output of the gain controlled amplifier.
REFERENCES:
patent: 3237451 (1966-03-01), Haeff
patent: 3596510 (1971-08-01), Paine
patent: 4383443 (1983-05-01), Langdon
Myracle Jerry W.
Schaap Robert J.
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