Phase difference measuring apparatus for measuring phase differe

Details Phase difference measuring apparatus for measuring phase differe Phase difference measuring apparatus for measuring phase differe

1997-02-25

1998-12-01

Brock, Michael

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324 7655, 73861356, G01R 2500

Patent

active

058444084

ABSTRACT:
A phase difference measuring apparatus for precisely measuring a phase difference between two input signals having the same frequency sent from, for example, a Coriolis type mass flowmeter. A differential amplifier in the apparatus provides the sum or difference of the two input signals and a multiplexor sequentially selects and outputs to an A/D converter the two input signals and the output of the differential amplifier. The A/D converter converts the output of the multiplexor into digital data and a digital signal processor or a microcomputer calculates the phase difference between the two input signals based on the converted digital data. The apparatus may further comprise a function that an error caused by the difference of the transfer characteristics of a filter and the A/D converter is compensated using a reference signal which is selected from the two input signals.

REFERENCES:
patent: 3513385 (1970-05-01), Pascoe
patent: 3895294 (1975-07-01), Vinding
patent: 4321602 (1982-03-01), Kipp
patent: 5024104 (1991-06-01), Dames
patent: 5050439 (1991-09-01), Thompson
patent: 5052231 (1991-10-01), Christ et al.
patent: 5069074 (1991-12-01), Young et al.
patent: 5469748 (1995-11-01), Kalotay

Affiliated with

Also associated with

Rating

Phase difference measuring apparatus for measuring phase differe does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Phase difference measuring apparatus for measuring phase differe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phase difference measuring apparatus for measuring phase differe will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2398437