KR940015388A - Method and device for weighing the heating object of microwave oven - Google Patents

Method and device for weighing the heating object of microwave oven Download PDF

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Publication number
KR940015388A
KR940015388A KR1019920025667A KR920025667A KR940015388A KR 940015388 A KR940015388 A KR 940015388A KR 1019920025667 A KR1019920025667 A KR 1019920025667A KR 920025667 A KR920025667 A KR 920025667A KR 940015388 A KR940015388 A KR 940015388A
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South Korea
Prior art keywords
weight
oscillation frequency
change
microwave oven
heated
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KR1019920025667A
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Korean (ko)
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전효식
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이헌조
주식회사 금성사
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Priority to KR1019920025667A priority Critical patent/KR940015388A/en
Publication of KR940015388A publication Critical patent/KR940015388A/en

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  • Control Of High-Frequency Heating Circuits (AREA)

Abstract

본 발명은 정전용량형 무게센서를 적용한 전자 레인지에 관한 것으로, 일반적인 전자 레인지는 피가열물의 중량을 측정하는 센서의 단품별 특성이 동일하여야만 정확하게 중량을 측정할 수 있으며 센서를 구성하고 있는 구성품들이 오차를 가지고 있어 지지물의 두께가 두꺼울 경우에는 초기 정전용량값이 작고 반대로 얇은 경우 정전용량 값은 표준에 비해 크게된다.The present invention relates to a microwave oven to which a capacitive weight sensor is applied. In general, a microwave oven can accurately measure the weight only when the characteristics of the sensor measuring the weight of the heated object are the same, and the components constituting the sensor are in error. If the thickness of the support is thick, the initial capacitance value is small, and if it is thin, the capacitance value is larger than the standard.

또한 판 스프링의 탄성오차등에 의해 중랑별 주파수 변화량이 가지각색이 되어 종래의 표준 주파수를 기준으로 중량을 환산할 경우 많은 오차가 발생하는 문제가 있게된다.In addition, due to the elastic error of the leaf spring, the frequency change for each mid-range becomes different, there is a problem that a lot of errors occur when converting the weight based on the conventional standard frequency.

이에 따라 본 발명의 목적은 상기와 같은 종래의 전자 레인지의 피가열물 중량측정회로에 따르는 결함을 해결하기 위하여, 피가열물의 중량변화에 따른 발진 주파수의 변화를 표준 변화율에 근접하도록 제어할 수 있는 전자레인지의 피가열물 측정방법 및 장치를 제공하는데 있다.Accordingly, an object of the present invention is to control the change in the oscillation frequency according to the weight change of the heated object close to the standard change rate in order to solve the defects according to the conventional heating object weighing circuit of the microwave oven as described above. The present invention provides a method and apparatus for measuring a heated object of a microwave oven.

Description

전자 레인지의 피가열물 중량 측정방법 및 장치Method and device for weighing the heating object of microwave oven

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제2도는 무게센서의 구성도, 제7도는 일반적인 전자 레인지의 시스템 블록 구성도, 제8도는 본 발명 전자 레인지의 중량 측정장치도.2 is a block diagram of a weight sensor, FIG. 7 is a block diagram of a system of a general microwave oven, and FIG. 8 is a weight measuring device of the microwave oven of the present invention.

Claims (4)

피가열물을 로딩하는 턴테이블(14)과, 상기 턴테이블(14)의 하부에 형성된 롤러(17)와, 상기 롤러(17)의 회전 궤적상에 위치하여 피가열물의 중량에 따라 그 정전용량이 변화하는 무게센서(8)와, 상기 무게센서(8)의 정전용량 변화에 따른 발진 주파수의 변화로 피가열물의 중량을 측정하는 센서신호 처리수단(7)을 구비한 전자레인지에 있어서, 비하중시 상기 롤러(17)가 무게센서(8)위를 통과할 때의 발진 주파수 변화량과 정하중시 롤러(17)가 무게센서(8)위를 통과할때의 발진 주파수 변화량으로부터 피가열물의 중량에 따른 발진 주파수 변화의 기울기를 구하고 이 기울기를 표준 기울기와 비교하여 발진 주파수 오차를 보정하는 것을 특징으로 하는 전자레인지의 피가열물 중량 측정방법.The capacitance of the turntable 14 for loading the object to be heated, the roller 17 formed below the turntable 14 and the rotational trajectory of the roller 17, and the weight of the object to be heated change. In a microwave oven having a weight sensor (8) and a sensor signal processing means (7) for measuring the weight of the object to be heated by a change in the oscillation frequency according to the capacitance change of the weight sensor (8), Oscillation frequency according to the weight of the object to be heated from variation in oscillation frequency when the roller 17 passes over the weight sensor 8 and oscillation frequency change when the roller 17 passes over the weight sensor 8 at the static load A method for measuring the weight of a heated object of a microwave oven, comprising: calculating a slope of a change and comparing the slope with a standard slope to correct an oscillation frequency error. 제1항에 있어서, 발진 주파수 변화의 기울기가 표준 기울기보다 크면 초기 발진 주파수를 작게 하고, 표준 기울기보다 작으면 초기 발진 주파수를 크게 하는 것을 특징으로 하는 전자 레인지의 피가열물 중량 측정방법.The method of claim 1, wherein the initial oscillation frequency is decreased when the slope of the oscillation frequency change is larger than the standard slope, and the initial oscillation frequency is increased when the slope of the oscillation frequency change is larger than the standard slope. 피가열물로 로딩하는 턴테이블(14)과, 상기 턴테이블(14)의 하부에 형성된 롤러(17)와, 상기 롤러(17)의 회전 궤적상에 위치하여 피가열물의 중량에 따라 그 정전용량이 변화하는 무게센서(8)와, 상기 무게센서(8)에 의해 측정된 정전용량의 변화량에 의해 발진 주파수를 가변하여 피가열물의 중량을 측정하는 그 초기 발진주파수를 임의로 가변할 수 있도록 구성된 센서신호 처리수단(7)을 포함하여 구성된 것을 특징으로 하는 전자 레인지의 피가열물 중량 측정장치.The capacitance of the turntable 14 loaded with the heated object, the roller 17 formed on the lower portion of the turntable 14, and the rotational path of the roller 17 is changed depending on the weight of the heated object. Sensor signal processing configured to arbitrarily vary the initial oscillation frequency for measuring the weight of the heated object by varying the oscillation frequency according to the weight sensor 8 and the amount of change in capacitance measured by the weight sensor 8. Heating device weight measuring apparatus of the microwave oven, characterized in that it comprises a means (7). 제1항에 있어서, 상기 센서신호 처리수단(7)은 다수의 반전기(I1 ~ I3)가 직렬로 접속되고 상기 반전기(I1 ~ I3)의 최종 출력단이 저항(R1, R2, VR)에 의해 선두 입력단에 접속되며 상기 저항(R1, R2)의 공통 접속점(a')이 상기 반전기(I2, I3)의 공통 접속점(a)에 무게센서(8)에 의해 접속되며, 상기 저항(VR)은 가변저항으로 구성된 것을 특징으로 하는 전자레인지의 피가열물 중량 측정장치.2. The sensor signal processing means (7) according to claim 1, wherein a plurality of inverters (I1 to I3) are connected in series and the final output terminals of the inverters (I1 to I3) are connected to the resistors (R1, R2, VR). Connected to the head input terminal, and the common connection point a 'of the resistors R1 and R2 is connected to the common connection point a of the inverters I2 and I3 by the weight sensor 8, and the resistance VR ) Is a heated object weighing apparatus of a microwave oven, characterized in that consisting of a variable resistor. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019920025667A 1992-12-26 1992-12-26 Method and device for weighing the heating object of microwave oven KR940015388A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019920025667A KR940015388A (en) 1992-12-26 1992-12-26 Method and device for weighing the heating object of microwave oven

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019920025667A KR940015388A (en) 1992-12-26 1992-12-26 Method and device for weighing the heating object of microwave oven

Publications (1)

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KR940015388A true KR940015388A (en) 1994-07-20

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KR1019920025667A KR940015388A (en) 1992-12-26 1992-12-26 Method and device for weighing the heating object of microwave oven

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