Measuring and testing – Volume or rate of flow – By measuring vibrations or acoustic energy
Patent
1990-04-30
1992-04-21
Ruehl, Charles A.
Measuring and testing
Volume or rate of flow
By measuring vibrations or acoustic energy
G01F 166
Patent
active
051056666
ABSTRACT:
An ultrasonic flowmeter includes first and second ultrasonic transducers which are mounted along a fluid measuring section opposite each other and whose connecting line makes an angle different from 90.degree. with the axis of the fluid measuring section. The transducers can be switched to transmit mode or receive mode by a switching arrangement having first and second switching paths per transducer, one conducting and the other simultaneously nonconducting, or vice versa. One end of the first and second switching paths is coupled to the associated first or second transducer. The first switching paths associated with the first and second transducers having their other ends coupled to the input of a measuring circuit, and the second switching paths associated with said first and second transducers having their other ends coupled to an oscillator. To reduce crosstalk, the switching arrangement includes two constantly nonconducting, parallel-connected switching paths coupled in series with an inverting amplifier between the oscillator output and the input of the measuring circuit or between the inputs of the two transducers.
REFERENCES:
patent: 3751979 (1973-08-01), Ims
patent: 4164865 (1979-08-01), Hall et al.
patent: 4633719 (1987-01-01), Vander Heyden
Kalmus, "Electronic Flowmeter System", The Review of Scientific Instruments, vol. 25, No. 3, pp. 201-206, Mar. 1954.
Endress+Hauser Flowtec AG
Ruehl Charles A.
LandOfFree
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 Ultrasonic flowmeter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ultrasonic flowmeter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1577635