Ultrasound flow sensor with a modulo-2Pi for a remaining...

Details Ultrasound flow sensor with a modulo-2Pi for a remaining... Ultrasound flow sensor with a modulo-2Pi for a remaining...

2005-12-06

2009-11-10

Thompson, Jewel (Department: 2855)

Measuring and testing

Volume or rate of flow

By measuring vibrations or acoustic energy

Reexamination Certificate

active

07614310

ABSTRACT:
For determining the transit time of an ultrasonic signal from an ultrasonic sensor that was launched into a measurement path by an ultrasonic converter, the phase shift of the ultrasonic signal is determined relative to a reference timing signal, and a remainder is determined as a measure of the transit time of the ultrasonic signal so that the phase shift is determined using a quadrature demodulation scheme, with which the received ultrasonic signal is inverted, in a segmented manner, using a timing signal and a phase-shifted timing signal, and the remainder is determined based on a characteristic quantity of the ultrasonic signal.

REFERENCES:
patent: 5046500 (1991-09-01), Fehr
patent: 6062091 (2000-05-01), Baumoel
patent: 198 18 053 (1998-10-01), None
patent: 0 338 593 (1989-10-01), None
patent: 0 362 631 (1990-04-01), None
patent: 00/43736 (2000-07-01), None
U.S. Appl. No. 12/042,369, filed Mar. 5, 2008, Zang et al.

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