Self-zeroing pressure signal generator

Details Self-zeroing pressure signal generator Self-zeroing pressure signal generator

1988-11-03

1990-05-22

Noland, Tom

Measuring and testing

Instrument proving or calibrating

Volume of flow, speed of flow, volume rate of flow, or mass...

G01L 2700

Patent

active

049266748

ABSTRACT:
A self-zeroing differential pressure signal generator. A strain gauge separates two areas of potentially differing fluid pressure and generates an electrical signal which varies as the fluid pressure difference varies. The strain gauge electrical signal is applied to the noninverting input terminal of noninverting amplifier, which develops a zeroed output signal. The noninverting amplifier includes a feedback loop which sums a feedback signal from the noninverting amplifier output with a zeroing compensation signal at the inverting input terminal of the amplifier. The zeroing compensation signal is developed by periodically eliminating the zeroing compensation signal and simultaneously exposing the strain gauge to a zero pressure difference. The output signal of the noninverting amplifier is compared to a reference output and a zeroing compensation signal is generated which, when summed with the feedback signal, brings the value of the output terminal to the value of the reference output.

REFERENCES:
patent: 3924612 (1975-12-01), Dempster et al.
patent: 4146875 (1979-03-01), Beatson et al.
patent: 4325382 (1982-04-01), Miodownik
patent: 4537065 (1985-08-01), Ootsuka et al.
patent: 4747296 (1988-05-01), Feldon et al.

Affiliated with

Also associated with

Rating

Self-zeroing pressure signal generator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Self-zeroing pressure signal generator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Self-zeroing pressure signal generator will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2125226