KR970062522A - Method and circuit for compensating food temperature in microwave oven - Google Patents

Method and circuit for compensating food temperature in microwave oven Download PDF

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Publication number
KR970062522A
KR970062522A KR1019960003595A KR19960003595A KR970062522A KR 970062522 A KR970062522 A KR 970062522A KR 1019960003595 A KR1019960003595 A KR 1019960003595A KR 19960003595 A KR19960003595 A KR 19960003595A KR 970062522 A KR970062522 A KR 970062522A
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KR
South Korea
Prior art keywords
temperature
food
output
compensation
compensating
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KR1019960003595A
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Korean (ko)
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KR100186402B1 (en
Inventor
김지원
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구자홍
Lg 전자주식회사
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Priority to KR1019960003595A priority Critical patent/KR100186402B1/en
Publication of KR970062522A publication Critical patent/KR970062522A/en
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Publication of KR100186402B1 publication Critical patent/KR100186402B1/en

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/6447—Method of operation or details of the microwave heating apparatus related to the use of detectors or sensors
    • H05B6/645—Method of operation or details of the microwave heating apparatus related to the use of detectors or sensors using temperature sensors
    • H05B6/6455—Method of operation or details of the microwave heating apparatus related to the use of detectors or sensors using temperature sensors the sensors being infrared detectors
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/66—Circuits
    • H05B6/68—Circuits for monitoring or control

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electric Ovens (AREA)
  • Radiation Pyrometers (AREA)

Abstract

본 발명은 전자 레인지의 음식물 온도 감지 보상 방법 및 회로에 관한 것으로, 종래에는 음식물의 온도를 감지하는 써모 파일형 적외선 센서의 주위 온도 변화를 보상할 때 한정된 범위로 제한됨으로 오차분 전압이 커서 실제 사용시에 측정 오차를 유발하는 문제점이 있었다. 이러한 종래의 문제점을 개선하기 위하여 본 발명은 한정되는 주위 온도 보상출력(Vth)의 범위에서 증폭율을 상수로 고정함이 없이 온도의 변화에 따라 가변되도록 하여 주위 온도 보상 오차 전압(dVT)을 최소화하고, 사용 온도 구간을 분할하여 각각의 온도대에 따라 오차분 전압(dVT)을 최소화함에 의해 센서의 성능을 향상시킬 수 있도록 창안한 것으로, 본 발명은 기존의 주위 온도 보상 회로에 의한 하드웨어적인 보상과 마이크로 컴퓨터내의 기저장되는 소프트웨어 프로그램에 의한 보상을 함께 행하여서 특정 사용 온도 구간에서 주위온도에 의한 오차분 전압(dVT)을 최소한하여 음식물의 온도를 정확히 감지함으로써 자동 요리를 정확하게 수행할 수 있다.The present invention relates to a method and a circuit for compensating food temperature of a microwave oven, and is limited to a limited range in compensating ambient temperature changes of a thermopile type infrared sensor for sensing the temperature of a food, Thereby causing a measurement error in the measurement. The present invention is around to ensure that varies according to changes in temperature without fixing the amplification factor in the range of ambient temperature compensation output (V th) is limited to a constant temperature compensation error voltage (dVT) in order to improve such conventional problems The present invention has been developed to minimize the error voltage (dVT) according to each temperature range and to improve the performance of the sensor by dividing the operating temperature range. Compensation is performed together with compensation by a stored software program in the microcomputer to minimize the error voltage (dVT) due to the ambient temperature in a specific use temperature range, so that the automatic cooking can be accurately performed by accurately detecting the temperature of the food .

Description

전자 레인지의 음식물 온도 감지 보상 방법 및 회로Method and circuit for compensating food temperature in microwave oven

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is a trivial issue, I did not include the contents of the text.

제9도는 본 발명의 음식물 온도 감지 보상 회로의 블럭도.FIG. 9 is a block diagram of a food temperature detection compensation circuit of the present invention; FIG.

제10도는 본 발명의 실시예를 보인 회로도.FIG. 10 is a circuit diagram showing an embodiment of the present invention. FIG.

Claims (4)

주위 온도 보상 전압(Vth)과 음식물 온도 감지에 따른 전압(Vout)을 온도(Tth)(Tout)로 변환하고 상기 주위 온도(Tth)가 속하는 구간을 판단하는 제1단계와, 상기에서 온도(Tth)가 속하는 구간에 따라 계수(K)를 결정하여 음식물 온도(Tout)에 합산하여 현재의 음식물 온도(T)를 산출하는 제2단계와, 상기에서 현재의 음식물 온도(T)가 목표 온도(TT)에 도달하였는지 판단하는 제3단계와, 상기에서 현재의 음식물 온도(T)가 목표 온도(TT)에 도달하지 않은 경우 상기 과정을 반복하여 현재의 음식물 온도(T)를 갱신하고, 도달한 경우 요리를 종료하는 제4단계로 이루어진 것을 특징으로 하는 전자 레인지의 음식물 온도 감지 보상 방법.A first step of converting an ambient temperature compensation voltage V th and a voltage Vout according to a food temperature detection into a temperature T th and determining an interval to which the ambient temperature T th belongs; A second step of determining a coefficient K according to an interval to which the temperature T th belongs and adding the calculated coefficient K to the food temperature T out to calculate a current food temperature T; A third step of determining whether the target food temperature T has reached the target temperature TT or not; and if the current food temperature T does not reach the target temperature TT, the process is repeated to update the current food temperature T And terminating the cooking when the temperature of the food is reached. 제1항에 있어서, 계수(K)는 특정 온도 사용 구간을 분할하여 각 구간마다 다른 값으로 부여한 것을 특징으로 하는 전자 레인지의 음식물 온도 감지 보상 방법.2. The method of claim 1, wherein the coefficient K is divided into a specific temperature usage period and different values for each interval. 음식물 온도와 자신의 주위 온도를 감지하는 센싱 수단과, 이 센싱 수단의 출력중 음식물 온도에 따른 감지 신호를 일정 레벨 증폭하는 신호 증폭 수단과, 상기 센싱 수단의 출력중 주위 온도에 따른 감지 신호를 보상하는 온도 보상 수단과, 상기 신호 증폭 수단의 출력(Vs)과 상기 온도 보상 수단의 출력(Vth)을 합산하는 신호 합성 수단과, 상기 온도 보상 수단의 출력(Vth)에 해당하는 온도(Tth)로부터 보상 계수(K)를 결정하고 상기 신호 합성 수단의 출력(Vout)에 해당하는 온도(Tout)에 상기 계수(K)를 합산함에 의해 현재의 음식물온도(T)를 산출하여 요리 동작을 제어하는 제어 수단으로 구성한 것을 특징으로 하는 전자 레인지의 음식물 온도 감지 보상 회로.A signal amplifying means for amplifying a sensed signal according to the temperature of the food in the output of the sensing means to a predetermined level; temperature compensation means, the temperature at which the signal synthesizing means for adding the output (Vs) and the output (V th) of the temperature compensating unit of the signal amplifying means, the output (V th) of the temperature compensating means for (T th and determines the current food temperature T by summing the coefficient K to the temperature Tout corresponding to the output Vout of the signal synthesizing means to determine the cooking operation And a controller for controlling the temperature of the microwave oven. 제3항에 있어서, 온도 보상 수단은 증폭율은 온도에 따라 가변되는 저항값(Rth)을 포함하여 아래 식과 같이 임의의 기준 전압(Vref)과 상기의 임의의 기준 전압(Vref)에 증폭율이 곱해진 값과의 합으로 온도 보상 출력 전압(Vth)을 출력하도록 구성한 것을 특징으로 하는 전자 레인지의 음식물 온도 감지 보상 회로.The temperature compensation circuit according to claim 3, wherein the amplification factor includes a resistance value (R th ) that varies depending on the temperature, so that the amplification factor can be obtained by multiplying the reference voltage V ref and the reference voltage V ref And a temperature-compensated output voltage (V th ) is outputted as a sum of the temperature-compensated output voltage (V th ) multiplied by the amplification factor. 여기서, Ri는 입력단의 저항이고, Rp는 입력단과 출력단 사이에 접속된 저항이다.Here, Ri is the resistance of the input terminal, and Rp is the resistance connected between the input terminal and the output terminal. ※ 참고사항 최초출원 내용에 의하여 공개하는 것임.※ Reference is disclosed by the contents of the first application.
KR1019960003595A 1996-02-14 1996-02-14 Circuit and method of sensing and compensating food temperature in a microwave oven KR100186402B1 (en)

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KR1019960003595A KR100186402B1 (en) 1996-02-14 1996-02-14 Circuit and method of sensing and compensating food temperature in a microwave oven

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KR1019960003595A KR100186402B1 (en) 1996-02-14 1996-02-14 Circuit and method of sensing and compensating food temperature in a microwave oven

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KR970062522A true KR970062522A (en) 1997-09-12
KR100186402B1 KR100186402B1 (en) 1999-03-20

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100942572B1 (en) * 2002-12-31 2010-02-16 엘지전자 주식회사 A temperature compensation method of microwave oven

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KR102378764B1 (en) 2020-04-08 2022-03-28 주식회사 이천 Circuit breaker connection structure
KR102378763B1 (en) 2020-04-09 2022-03-28 주식회사 이천 Connection structure of the bus-bar of the distribution panel
KR20220007764A (en) 2020-07-09 2022-01-19 삼성디스플레이 주식회사 Organic light emitting diode display device performing a sensing operation, and method of sensing degradation of an organic light emitting diode display device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100942572B1 (en) * 2002-12-31 2010-02-16 엘지전자 주식회사 A temperature compensation method of microwave oven

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