Oxygen concentration measurement and control

Chemistry: electrical and wave energy – Processes and products – Vacuum arc discharge coating

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

324 65R, 324441, 324442, G01N 2758

Patent

active

043760260

ABSTRACT:
Method and apparatus are disclosed for measuring and controlling the concentration of oxygen in a gas. A sensor (10) is provided having a zirconium dioxide wall (12). One side of the wall is exposed to a reference gas having a known oxygen concentration while the other side is exposed to a gas having the unknown oxygen concentration. An electrical potential is developed at the sensor output, where the magnitude of the potential is dependent upon the relative oxygen concentrations on either side of the sensor wall and the temperature of the wall. The reference gas is selected such that variations in the electrical potential due to temperature changes are minimized over the expected range of temperatures to which the sensor will be subjected during the oxygen concentration measurements and over the range of oxygen concentrations which must be measured.
The sensor temperature is measured by measuring the resistance of the sensor, which varies directly with temperature. An oscillator (28) provides an AC signal which is applied to the sensor (10) such that the AC signal is superimposed on the DC sensor output and has a magnitude dependent upon the resistance and therefore the temperature of the sensor. The AC and DC components are isolated from one another by two filters (32, 34) and separately utilized as temperature and oxygen concentration indications.

REFERENCES:
patent: 3056919 (1962-10-01), Kuipers
patent: 3521159 (1970-07-01), Morrow
patent: 3765841 (1973-10-01), Paulson et al.
patent: 3915135 (1975-10-01), Kushida et al.
patent: 4071817 (1978-07-01), Bahl
patent: 4138639 (1979-02-01), Hutchins

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Oxygen concentration measurement and control does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Oxygen concentration measurement and control, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Oxygen concentration measurement and control will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1733795

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.