Method for controlling read-time of a humidity sensor in a micro

Details Method for controlling read-time of a humidity sensor in a micro Method for controlling read-time of a humidity sensor in a micro

1995-08-16

1997-05-27

Leung, Philip H.

Electric heating

Microwave heating

With control system

219702, 99325, H05B 680

Patent

active

056329202

ABSTRACT:
Disclosed is a method capable of controlling read-time of a humidity sensor of a microwave oven so as to void interference by other parts in the microwave oven or exterior apparatuses, and thereby sensing an accurate humidity value in the microwave oven. In the method, one period of a frequency of an electric power is divided into a first section and a second section according to an outer interrupt signal. The humidities are sensed by predetermined times respectively in the first section and the second section, and then a noise count is increased in a corresponding section when a difference between a maximum value and a minimum value in each section is larger than a predetermined reference value. The obtained noise counts are compared, and then one section having less noise count is determined as a humidity sensing read time section.

REFERENCES:
patent: 4518839 (1985-05-01), Taguchi et al.
patent: 5200589 (1993-04-01), Kim
patent: 5445009 (1995-08-01), Yang et al.

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