Apparatus and method for perceiving or absence of a cover for a

Details Apparatus and method for perceiving or absence of a cover for a Apparatus and method for perceiving or absence of a cover for a

1996-12-12

1998-06-30

Leung, Philip H.

Electric heating

Microwave heating

With control system

219704, 219719, 99325, H05B 668

Patent

active

057738009

ABSTRACT:
An apparatus and method for detecting the presence or absence of a container cover and for determining how much food is present in a microwave oven. The apparatus includes a sensor for sensing the state of an exhaust from the heating chamber in the microwave oven, and a sensor output processor for processing a signal from the sensor, calculating cooking information according to the signal, and identifying the presence or absence of a container cover and determining how much food is present by utilizing the cooking information and inputted cooking time information to provide a control signal for controlling a heating time of said heating chamber. In particular, the apparatus includes a sensor output processing section for converting the signal from the sensor into a digital signal, a perception processing section for receiving the sensor output signal outputted from the sensor corresponding to a cooking progress, for calculating an area ratio utilizing the sensed signal, and for perceiving the presence or absence of the container cover and determining how much food is present, and a controller for controlling a driving section by calculating a heating time based on the perceived information perceived by the perception processing section.

REFERENCES:
patent: 4350862 (1982-09-01), Ueda
patent: 4484065 (1984-11-01), Ueda
patent: 4864088 (1989-09-01), Hiejima et al.
patent: 4874928 (1989-10-01), Kasai

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