Dual element-single oscillator-ratio type digital transducer

Details Dual element-single oscillator-ratio type digital transducer Dual element-single oscillator-ratio type digital transducer

1981-05-26

1983-02-01

Gill, James J.

Measuring and testing

Volume or rate of flow

With indirect temperature or density compensation

73497, 73708, 364571, 364703, G01L 1904

Patent

active

043708919

ABSTRACT:
A compensated measurement system utilizing dual sensing elements (10, 12) and a single variable frequency oscillator (14). A common operative association between the sensing elements (10, 12) and the oscillator (14) is achieved by multiplexing. Temperature and supply voltage variations are compensated by generating an output (f.sub.0) which is proportional to the ratio of the two generated frequencies (f.sub.1, F.sub.2).

REFERENCES:
patent: 2641706 (1953-06-01), Dickinson
patent: 3355949 (1967-12-01), Elwood et al.
patent: 3943341 (1976-03-01), Corsi et al.
patent: 4208918 (1980-06-01), Miyamae
patent: 4321832 (1982-03-01), Runyan

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