Measuring and testing – Volume or rate of flow – System
Patent
1974-05-14
1976-12-07
Gill, James J.
Measuring and testing
Volume or rate of flow
System
G01F 132
Patent
active
039954820
ABSTRACT:
A vortex swirl flowmeter sensor circuit electrically connected to an electro-thermal sensor generates a voltage signal output from a flowmeter probe with the signal having a large signal to noise ratio. The sensor is electrically connected in a bridge network in the input to an operational amplifier. The output of the amplifier is fed back through a signal enhancement circuit for maintaining the instantaneous temperature of the sensor, and therefore its resistance constant.
REFERENCES:
patent: 2726546 (1955-12-01), King
patent: 3370463 (1968-02-01), Chanaud
patent: 3429178 (1969-02-01), Durbin
patent: 3438253 (1969-04-01), Kuether et al.
patent: 3564915 (1971-02-01), Tomota et al.
"Journal of Society of Instrument Control Engineering," (Japan) vol. 10, No. 3, March 1971 pp. 173-188, by Yamasaki et al.
A Book, "Instrument Technology" by Jones, Butterworth & Co. Publishers, pp. 162, 163 copyrighted 1974.
Chrysler Corporation
Gill James J.
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