Capacitive fluid-gauging probes and systems

Details Capacitive fluid-gauging probes and systems Capacitive fluid-gauging probes and systems

1982-09-27

1984-09-25

Yasich, Daniel M.

Measuring and testing

Liquid level or depth gauge

Immersible electrode type

324 61P, 324 61R, G01F 2326, G01R 2722

Patent

active

044729685

ABSTRACT:
A fuel-gauging system has a capacitive probe comprising an outer tubular electrode and a coaxial inner electrode. The outer electrode is supplied with an alternating signal from an oscillator, the inner electrode being connected to a detector unit via a resistor. The resistor is mounted between the electrodes about midway along the length of the probe, the resistor having a value that is selected to give a substantially linear output of the probe and is at least 0.1 of the reactance of the probe, preferably being about 0.3595 of the reactance. The resistor may be connected to a phase-sensitive circuit that is controlled by a phase-shift circuit which receives the input signals to the probe and shifts their phase by 90.degree., so as to produce an output that is in phase with the probe output. In this case the value of the resistor is preferably 0.2178 of the probe reactance.

REFERENCES:
patent: 2918818 (1959-12-01), Meyer
patent: 2941403 (1960-06-01), Steenfeld et al.
patent: 3083572 (1963-04-01), Pearson
patent: 3283577 (1966-11-01), Schuck
patent: 4212202 (1980-07-01), Schmidt
patent: 4347741 (1982-09-01), Geiger
patent: 4417473 (1983-11-01), Tward et al.

Affiliated with

Also associated with

Rating

Capacitive fluid-gauging probes and systems does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Capacitive fluid-gauging probes and systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Capacitive fluid-gauging probes and systems will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1765801