Measuring and testing – Volume or rate of flow – By measuring vibrations or acoustic energy
Patent
1979-02-28
1980-12-23
Ruehl, Charles A.
Measuring and testing
Volume or rate of flow
By measuring vibrations or acoustic energy
73579, G01F 166
Patent
active
042402921
ABSTRACT:
A method for triggering an ultrasonic flow meter comprising a synchronized ring circuit, consists of periodically turning the ring circuit on and off by trigger pulses whose repetition period is varied within the range of possible changes of the repetition period of autocirculation pulses of the synchronized ring circuit until an autocirculation pulse is matched with a trigger pulse. At such point, the application of trigger pulses to the synchronized ring circuit is discontinued by matching the frequency of the trigger pulses with that of the autocirculation pulses via continuous automatic phase control of the trigger pulse frequency. With no autocirculation pulses in the synchronized ring circuit, the application of trigger pulses is resumed.
REFERENCES:
patent: 3715709 (1973-02-01), Zacharias, Jr. et al.
patent: 4095457 (1978-06-01), Koda et al.
patent: 4144753 (1979-03-01), Larsen
Smyshlyaev Vladimir V.
Zalessky Eduard A.
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