Goldstar, Co., Ltd.

Ki T Oh

Jin Seong Hwang

Apparatus and method for determining the condition of the floor to be cleaned by a cleaning robot. The apparatus comprises an ultrasonic wave signal transmitting circuit for transmitting an ultrasonic wave signal to an ultrasonic wave signal transmitter under the control of a microcomputer, a receiving amplifying unit for amplifying the ultrasonic wave signal transmitted from the ultrasonic wave signal transmitter and received in a ultrasonic wave signal receiver, a receiving demodulating unit for smoothing the output signal from the receiving amplifying unit to demodulate it and then apply it to the microcomputer. According to the control of the microcomputer, the ultrasonic wave signal is transmitted for a predetermined period. The period from the time when the ultrasonic wave signal is transmitted to the time when the ultrasonic wave signal is received in the ultrasonic wave signal receiver is measured. Then, the distance between the position of the ultrasonic wave signal receiver and the floor to be cleaned is calculated from the measured period. Accordingly, it can be determined whether the floor to be cleaned is a normal floor, a floor covered with a carpet, or stairs, thereby enabling correct recognition of the condition of the floor to be cleaned, without being adversely affected from environment.

Apparatus and method for recognizing carpets and stairs by cleaning robot

An automatic cooking control system for a microwave oven having a turntable utilizes an initial operation process which makes the air temperature of a heating chamber by uniformed only operating a fan. The automatic cooking control system further utilizes first stage heating operation process which actuates a magnetron after the initial operation process. The first stage process detects, an outflow air temperature, stores it as a present temperature, and obtains an arithmetical mean of the present temperature and a previous temperature detected prior to a half rotational period of the turntable. The first stage heating operation process is carried out until the arithmetical mean is raised as much as a predetermined value established according to the kind of food being cooked. The system also utilizes a second stage heating operation process which is carried out for a time period that is obtained by multiplying the first stage heating time by a predetermined value established by the kind of food being cooked. This system can automatically cook food with the correct heating time even though the outflow air temperature detected by a temperature sensor oscillates due to the rotation of the turntable.

Automatic cooking control system for a microwave oven

An automatic cooking control system for a microwave oven which utilizes an initial operation process that shifts a temperature of inflow air stored in memories to other memories and repeatedly stores a present inflow air temperature in another memory until the present detected inflow air temperature is equal to the temperature stored in the memory. This initial process also determines a temperature variation in the inflow air and a temperature difference between the air flowing in and out. A temperature compensating portion is obtained from the temperature variation and difference, which is used to establish a temperature increment by dividing the temperature compensating portion into a predetermined temperature increment. The microwave oven then utilizes a first stage heating process until the temprature of the air flowing from a heating chamber is raised as much as the compensated temperature increment. When this condition is realized, a second stage heating process is carried out for the time of the first stage heating time multiplied by a predetermined value according to the kind of food being cooked.

An automatic cooking control system for a microwave oven utilizes an initial operation process which determines an initial operation process which determines a temperature increment compensating portion from a temperature variation and a temperature difference. The system also utilizes a first stage heating process which executes heating operations until the air temperature of the air flowing out of a heating chamber is raised as much as the compensated temperature increment. A second stage heating process is also utilized to execute a heating operation for a period of time that is equal to the first stage heating period of time multiplied by a predetermined value. The predetermined value is set according to the kind of food being cooked. Even if one is cooking a new food immediately after another food has been cooked, the food can be automatically cooked correctly and optimally.

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Kyungsangnam, South Korea

Ki T Oh