JPS54145040A - Microwave oven - Google Patents
Microwave ovenInfo
- Publication number
- JPS54145040A JPS54145040A JP5351778A JP5351778A JPS54145040A JP S54145040 A JPS54145040 A JP S54145040A JP 5351778 A JP5351778 A JP 5351778A JP 5351778 A JP5351778 A JP 5351778A JP S54145040 A JPS54145040 A JP S54145040A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- signal
- signal voltage
- voltage
- entered
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Radiation Pyrometers (AREA)
- Control Of High-Frequency Heating Circuits (AREA)
- Electric Ovens (AREA)
Abstract
PURPOSE: To dispense with the constant temperature compensation of a detector element by dry ice or the like, by providing a compensation circuit for a detection circuit for infrared rays emitted from a heated material.
CONSTITUTION: The signal voltage V2 of an infrared ray detector is represented as V2=V1(R0+ΔR)/R2 where R0 denotes a fundamental resistance and ΔR denotes a resistance component which fluctuates due to the of incidence the infrared rays. The DC component (V1/R2)R2 of the signal voltage V2 is blocked by a filter circuit 14 so that only the AC component (V1/R2)ΔR of the signal voltage is amplified to a detected amplified voltage V3 by a detection amplifier circuit 15. The voltage V3 is changed into a signal V4 by a logarithmic conversion circuit 16. The signal V4 is entered into an error compensation circuit 17. The signal voltage V2 is also entered into the error compensation circuit 17. The signal voltage V2 is also entered into the compensation circuit. The signal V4 is compensated by a calculation part 17a of the circuit 17 to prevent the error due to the temperature difference between the heated material and a room. A control circuit 18 controls a high-frequency oscillation circuit 19 by a compensated signal voltage V5.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5351778A JPS6026273B2 (en) | 1978-05-04 | 1978-05-04 | Infrared temperature detection device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5351778A JPS6026273B2 (en) | 1978-05-04 | 1978-05-04 | Infrared temperature detection device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54145040A true JPS54145040A (en) | 1979-11-12 |
JPS6026273B2 JPS6026273B2 (en) | 1985-06-22 |
Family
ID=12945007
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5351778A Expired JPS6026273B2 (en) | 1978-05-04 | 1978-05-04 | Infrared temperature detection device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6026273B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100424560B1 (en) * | 1996-12-23 | 2004-07-23 | 주식회사 엘지이아이 | Automatic cooking control method of heater-heating type microwave oven to enable minimization of noise caused by infrared rays and exact measurement of temperature of food by infrared sensor |
-
1978
- 1978-05-04 JP JP5351778A patent/JPS6026273B2/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100424560B1 (en) * | 1996-12-23 | 2004-07-23 | 주식회사 엘지이아이 | Automatic cooking control method of heater-heating type microwave oven to enable minimization of noise caused by infrared rays and exact measurement of temperature of food by infrared sensor |
Also Published As
Publication number | Publication date |
---|---|
JPS6026273B2 (en) | 1985-06-22 |
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