Measuring and testing – Volume or rate of flow – By measuring vibrations or acoustic energy
Patent
1981-01-22
1983-05-24
Ruehl, Charles A.
Measuring and testing
Volume or rate of flow
By measuring vibrations or acoustic energy
G01F 166
Patent
active
043844910
ABSTRACT:
A meter for measuring the velocity of a fluid by ascertaining propagation periods of acoustic wave packets transmitted therein, the meter including a pair of transducers for disposition in the fluid, a transmitter for transmitting a packet between the transducers in an upstream or downstream direction designated by an up/down signal at each time designated by a transmit signal and a receiver for developing a received signal marking the time of receipt by a transducer of each packet, the times being marked so as to avoid amplitude and half-cycle ambiguity errors. The meter also includes a phase detector for comparing the received times with those marked by a reference signal to develop early and late pulses, a decoder and a pair of integrators for developing from the pulses a pair of integrated signals representing changes in the upstream and downstream propagation periods, another integrator for combining the integrated signals to develop a signal representing the acoustic velocity of the fluid and an amplifier for combining the integrated signals to develop a signal representing the velocity of the fluid. Further, the meter includes a ramp generator for developing the up/down signal, a ramp signal and the transmit signal from the acoustic velocity signal and the combination of a multiplexer, a multiplier and a comparator for developing the reference signal, the multiplier for developing a signal inversely proportional to the acoustic velocity signal and multiplying it by a signal developed by multiplexing the integrated signals.
REFERENCES:
patent: 4022058 (1977-05-01), Brown
Brown Alvin E.
Johnson Rodney C.
Bestobell Sparling Ltd.
Ruehl Charles A.
Schatzel Thomas E.
LandOfFree
Analog ultrasonic flowmeter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Analog ultrasonic flowmeter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Analog ultrasonic flowmeter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2141197