Measuring and testing – Gas analysis – Moisture content or vapor pressure
Patent
1993-11-29
1995-08-29
Gutierrez, Diego F. F.
Measuring and testing
Gas analysis
Moisture content or vapor pressure
219707, 7333505, G01W 100, G01N 2704
Patent
active
054450098
ABSTRACT:
Apparatus and method for removing the influence of microwave noise, without any shielding parts, thus increasing the reliability of detected humidity information. According to the invention, the cumulative difference of humidity values sensed by a humidity sensor is calculated for each half period of a commercial alternating current frequency, oscillating and non-oscillating terms of a magnetron are determined by comparing the calculated cumulative differences with each other, and the humidity-sensed values obtained during the determined non-oscillating terms of the magnetron are used as humidity information for automatic cooking control. In order to even further remove the influence of the microwave noise, the humidity sensor may include capacitors for bypassing the microwave noise introduced into the sensor.
REFERENCES:
patent: 4270085 (1981-05-01), Terada et al.
patent: 4336433 (1982-06-01), Yokozeki
patent: 4672180 (1987-06-01), Kusonoki et al.
patent: 4734554 (1988-03-01), Tateda et al.
patent: 4768378 (1988-09-01), Ando et al.
patent: 4857685 (1989-08-01), Vigano et al.
Han Sung J.
Lim Hyoung T.
Yang Woo J.
Goldstar Co. Ltd.
Gutierrez Diego F. F.
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