CN201166795Y - Temperature recognition device - Google Patents
Temperature recognition device Download PDFInfo
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- CN201166795Y CN201166795Y CNU2008200442736U CN200820044273U CN201166795Y CN 201166795 Y CN201166795 Y CN 201166795Y CN U2008200442736 U CNU2008200442736 U CN U2008200442736U CN 200820044273 U CN200820044273 U CN 200820044273U CN 201166795 Y CN201166795 Y CN 201166795Y
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 16
- 238000001514 detection method Methods 0.000 abstract description 3
- 230000006698 induction Effects 0.000 abstract 1
- 239000003990 capacitor Substances 0.000 description 13
- 238000001914 filtration Methods 0.000 description 6
- 239000000919 ceramic Substances 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 3
- 238000010411 cooking Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
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Abstract
The utility model relates to a temperature identification device which is specially used for the temperature detection and control of an induction cooker on heated cookware. The device comprises a sound-sensitive sensor (1), a sound processing circuit (2), a central processing unit (4) and a power regulator (5), wherein the output end of the sound-sensitive sensor (1) is connected with the input end of the sound processing circuit (2), the output end of the sound processing circuit (2) is connected with the input end of the central processing unit, and the output end of the central processing unit (4) is connected with the input end of the power regulator (5). The central processing unit (4) is also connected with a program memory (3). The utility model discloses owing to adopt the sound through detecting the water in the pressure cooker, judge the structure of the temperature of water according to the change of the water sound that detects, then come the power control ware to adjust the power output of electromagnetism stove according to the temperature. The utility model discloses can the accurate temperature of judging the pressure cooker water-logging, can the energy saving and can realize automatic shutdown, effectual protection pan and electromagnetism stove.
Description
Technical field:
The utility model is a kind of electromagnetic oven carries out temperature detection and control to the pan that is heated temperature recognition device that is exclusively used in, be particularly related to a kind of electromagnetic oven that is exclusively used in to the temperature recognition device that the pressure cooker that is heated carries out temperature detection and control, belong to the renovation technique of electromagnetic oven with the temperature recognition device.
Background technology:
Along with the maturation day by day of electromagentic furnace technology, quick, the clean free of contamination cooking electric appliance of this heating is liked selecting by increasing family.The home-use electromagnetism stove of part heated pressure pot is also arranged at present, but the existing electromagnetic oven thermometric mode cooking bottom temperature that is pan passes to the temperature sensor that is positioned at below the ceramic wafer by ceramic wafer.Reason owing to the heat transmission, the temperature in the bottom of a pan and sensor sensing to temperature can not form stable, a quantifiable funtcional relationship, and may there be the space between the bottom of a pan and ceramic wafer and ceramic wafer and the sensor, sensor sensing to temperature with the pot in a temperature differ bigger, with electromagnetic oven heated pressure pot, be difficult to accurately judge the temperature of pressure cooker.Because detected temperatures is inaccurate, cause being difficult to guarantee to make delicious food with electromagnetic oven heated pressure pot, if heat time heating time weak point, then pot inner pressure little or just do not have pressure at all, do not have the effect of pressure cooking; If continuous heated pressure pot of long period can cause pot inner pressure excessive, the waste electric energy, even the pressure cooker explosion accident may take place.
The utility model content:
The purpose of this utility model is to consider the problems referred to above and a kind of simple in structure, reliable, economic temperature recognition device is provided.The utility model is judged the temperature of water by the sound of water in the detected pressures pot according to the variation of detected underwater sound sound.
The technical solution of the utility model is: include acoustic sensor, sound treatment circuit, central processing unit and power governor, wherein the output terminal of acoustic sensor is connected with the input end of sound treatment circuit, the output terminal of sound treatment circuit is connected with the input end of central processing unit, and the output terminal of central processing unit is connected with the input end of power governor.
Above-mentioned central processing unit also is connected with program storage.
Above-mentioned acoustic sensor is a piezoceramic transducer.
Above-mentioned central processing unit is one chip microcomputer or digital signal processor or integrated circuit controller.
Above-mentioned central processing unit is the one chip microcomputer of TMP86F 08, and program storage is integrated in one chip microcomputer inside.
The tut treatment circuit includes resistance (R1, R2, R3, R4, R5, R6, R7), electric capacity (C1, C2, C3, C4), transistor (VT1, VT2), it is in parallel after wherein resistance (R1) is connected with electric capacity (C1) with resistance (R2), and resistance (R1) is connected with power supply with the common port of resistance (R2), electric capacity (C1) is connected with the output terminal of acoustic sensor (1) with the link of resistance (R1), the other end of electric capacity (C1) connects the base stage of transistor (VT1), resistance (R3) is connected in parallel between the base stage and collector of transistor (VT1), resistance (R4) is connected between the collector and ground of transistor (VT1), between the base stage of electric capacity (C2) and collector that is connected on transistor (VT1) after resistance (R6) is connected and transistor (VT2), the emitter of transistor (VT1) is connected with power supply, the collector of one end of resistance (R5) and transistor (VT2) connects, the other end of resistance (R5) is connected with power supply, the grounded emitter of transistor (VT2), electric capacity (C 3) is connected in parallel between the collector and emitting stage of transistor (VT2), the series circuit that resistance (R7) and electric capacity (C4) are formed is connected in parallel between the collector and emitting stage of transistor (VT2), and the common port of resistance (R7) and electric capacity (C4) is connected with the sample port of central processing unit (4).
Above-mentioned power governor includes resistance (R8, R9), electric capacity (C5), transistor (VT3, VT4), the output interface of central processing unit is connected with the base stage of transistor (VT3, VT4), resistance (R8) is connected in parallel between the collector and base stage of transistor (VT3), electric capacity (C5) is connected in parallel between the collector and base stage of transistor (VT4), resistance (R9) is connected between the emitter of the emitter of transistor (VT3) and transistor (VT4), the collector of transistor (VT3) is connected with power supply, the grounded collector of transistor (VT4).
The utility model is owing to adopt the sound that passes through water in the detected pressures pot, judge the structure of the temperature of water according to the variation of detected underwater sound sound, in the electromagnetic oven heating pressure cooker, the voice signal that acoustic sensor is gathered water in the pressure cooker changes into the sound wave electric signal, passes to sound treatment circuit and carries out signal amplification and filtering; Sound treatment circuit to the sound wave electric signal amplify with filtering after, by the data sampling interface of central processing unit it is sampled, the data message of central processing unit after to sampling is through a series of computings, relatively obtain the water temperature data.Come the power controlling regulator that the power output of electromagnetic oven is regulated according to water temperature then.The utility model detects by the underwater sound in the pressure cooker, accurately judges the temperature of water in the pressure cooker, can energy savings and can realize automatic the shutdown, effectively protect pan and electromagnetic oven.The utility model is that a kind of design is ingenious, function admirable, convenient and practical temperature recognition device.
Description of drawings:
Fig. 1 is a theory diagram of the present utility model.
Fig. 2 is the circuit diagram of the utility model embodiment.
Embodiment:
Embodiment:
Theory diagram of the present utility model as shown in Figure 1, include acoustic sensor 1, sound treatment circuit 2, central processing unit 4 and power governor 5, wherein the output terminal of acoustic sensor 1 is connected with the input end of sound treatment circuit 2, the output terminal of sound treatment circuit 2 is connected with the input end of central processing unit 4, and the output terminal of central processing unit 4 is connected with the input end of power governor 5.
In the present embodiment, above-mentioned acoustic sensor 1 is piezoceramic transducer S1.
Above-mentioned central processing unit 4 also is connected with program storage 3.Above-mentioned central processing unit 4 is one chip microcomputer (MCU) or digital signal processor (DSP) or integrated circuit controller (IC).In the present embodiment, it is the one chip microcomputer of TMP86F08 that above-mentioned central processing unit 4 adopts model, and program storage 3 is integrated in one chip microcomputer inside.The sample port of single-chip microcomputer TMP86F08 is AIN0.The PWM end is connected with power governor as the output interface of single-chip microcomputer.Its inner program storage 3 has increased through collection and the handling procedure of amplification with filtering sound wave electric signal afterwards.
In the present embodiment, tut treatment circuit 2 includes resistance R 1, R2, R3, R4, R5, R6, R7, capacitor C 1, C2, C3, C4, transistor VT1, VT2, it is in parallel after wherein resistance R 1 is connected with capacitor C 1 with resistance R 2, and resistance R 1 is connected with power supply with the common port of resistance R 2, capacitor C 1 is connected with the output terminal of acoustic sensor 1 with the link of resistance R 1, the other end of capacitor C 1 connects the base stage of transistor VT1, resistance R 3 is connected in parallel between the base stage and collector of transistor VT1, resistance R 4 is connected between the collector and ground of transistor VT1, between the base stage of capacitor C 2 and collector that is connected on transistor VT1 after resistance R 6 is connected and transistor VT2, the emitter of transistor VT1 is connected with power supply, one end of resistance R 5 and the collector of transistor VT2 connect, the other end of resistance R 5 is connected with power supply, the grounded emitter of transistor VT2, capacitor C 3 is connected in parallel between the collector and emitting stage of transistor VT2, the series circuit that resistance R 7 and capacitor C 4 are formed is connected in parallel between the collector and emitting stage of transistor VT2, and the common port of resistance R 7 and capacitor C 4 is connected with the sample port of central processing unit 4.
In the present embodiment, above-mentioned power governor 5 includes resistance R 8, R9, capacitor C 5, transistor VT3, VT4, the output interface of central processing unit 4 is connected with the base stage of transistor VT3, VT4, and resistance R 8 is connected in parallel between the collector and base stage of transistor VT3, capacitor C 5 is connected in parallel between the collector and base stage of transistor VT4, resistance R 9 is connected between the emitter of the emitter of transistor VT3 and transistor VT4, and the collector of transistor VT3 is connected with power supply, the grounded collector of transistor VT4.
The utility model temperature recognition device is installed on the electromagnetic oven, above-mentioned acoustic sensor 1 places below the electromagentic furnace ceramic plate, sound treatment circuit 2 can be contained on electromagnetic oven display board or the master control borad, central processing unit 4 can be judged water temperature in the pressure cooker by relevant sound characteristic, as: the sound that water sends between 20～60 degree is very little, the sound that sends between 60～90 degree increases successively, and sound is almost constant after boiling.Central processing unit 4 is rationally adjusted output power according to these features in conjunction with the difference in functionality that the user selects for use, makes the food delicious food of culinary art, also guarantees the safety of pressure cooker simultaneously.
Concrete principle of work of the present utility model is as follows: under the state of electromagnetic oven heating pressure cooker, the boiled signal of sounding of water in pressure cooker, acoustic sensor S1 gathers this signal and is converted into weak electric signal, filter wherein direct current signal through capacitor C 1, remaining AC signal part is amplified through VT1, wherein, enlargement factor is by resistance R 1, R2, R 3, the R4 decision, carrying out cascode through capacitor C 2 couplings to VT2 again after the amplification amplifies, its enlargement factor is by resistance R 5, R6, and the decision of the enlargement factor of transistor itself, the electric signal that the process two-stage is amplified is again by R7, C3, the II type filtering circuit that C4 forms carries out filtering.Electric signal after the filtering enters single-chip microcomputer inside via the sampling of Chip Microcomputer A IN0 port, then according to collection and handling procedure in the program storage 3 of single-chip microcomputer inside, analyze the feature of electric signal, thereby obtain water temperature value in the pressure cooker as amplitude, frequency etc.At the PWM square-wave signal of exporting corresponding dutycycle according to water temperature value.
When PWM port output high level, transistor VT3 conducting, VT4 ends.The emission of VT4 is high level very, at this moment, can make the IGBT conducting of electromagnetic oven, electromagnetic oven output corresponding power.
When PWM port output low level, transistor VT 3 ends, the VT4 conducting, and the emission of VT4 is low level very, at this moment, the IGBT of electromagnetic oven is turn-offed, and electromagnetic oven stops power output.
Resistance R 9 is a current-limiting resistance, can effectively prevent transistor VT3 and VT4 conducting simultaneously and is burnt.Resistance R 8 is a pull-up resistor, prevents that the high level amplitude of PWM end output from causing making transistor VT3 conducting inadequately.Capacitor C 5 provides a negative pressure to make the reliable conducting of transistor VT4 when holding output low level for PWM.
Claims (7)
1, a kind of temperature recognition device, it is characterized in that including acoustic sensor (1), sound treatment circuit (2), central processing unit (4) and power governor (5), wherein the output terminal of acoustic sensor (1) is connected with the input end of sound treatment circuit (2), the output terminal of sound treatment circuit (2) is connected with the input end of central processing unit (4), and the output terminal of central processing unit (4) is connected with the input end of power governor (5).
2, temperature recognition device according to claim 1 is characterized in that above-mentioned central processing unit (4) also is connected with program storage (3).
3, temperature recognition device according to claim 1 is characterized in that above-mentioned acoustic sensor (1) is a piezoceramic transducer (S1).
4, temperature recognition device according to claim 1 is characterized in that above-mentioned central processing unit (4) is one chip microcomputer or digital signal processor or integrated circuit controller.
5, temperature recognition device according to claim 4 is characterized in that above-mentioned central processing unit (4) is the one chip microcomputer of TMP86F08, and program storage (3) is integrated in one chip microcomputer inside.
6, according to each described temperature recognition device of claim 1 to 5, it is characterized in that tut treatment circuit (2) includes resistance (R1, R2, R 3, R4, R5, R6, R7), electric capacity (C1, C2, C3, C4), transistor (VT1, VT2), it is in parallel after wherein resistance (R1) is connected with electric capacity (C1) with resistance (R2), and resistance (R1) is connected with power supply with the common port of resistance (R2), electric capacity (C1) is connected with the output terminal of acoustic sensor (1) with the link of resistance (R1), the other end of electric capacity (C1) connects the base stage of transistor (VT1), resistance (R3) is connected in parallel between the base stage and collector of transistor (VT1), resistance (R4) is connected between the collector and ground of transistor (VT1), between the base stage of electric capacity (C2) and collector that is connected on transistor (VT1) after resistance (R6) is connected and transistor (VT2), the emitter of transistor (VT1) is connected with power supply, the collector of one end of resistance (R5) and transistor (VT2) connects, the other end of resistance (R5) is connected with power supply, the grounded emitter of transistor (VT2), electric capacity (C3) is connected in parallel between the collector and emitting stage of transistor (VT2), the series circuit that resistance (R7) and electric capacity (C4) are formed is connected in parallel between the collector and emitting stage of transistor (VT2), and the common port of resistance (R7) and electric capacity (C4) is connected with the sample port of central processing unit (4).
7, temperature recognition device according to claim 6, it is characterized in that above-mentioned power governor (5) includes resistance (R8, R9), electric capacity (C5), transistor (VT3, VT4), the output interface of central processing unit (4) and transistor (VT3, VT4) base stage connects, resistance (R8) is connected in parallel between the collector and base stage of transistor (VT3), electric capacity (C5) is connected in parallel between the collector and base stage of transistor (VT4), resistance (R9) is connected between the emitter of the emitter of transistor (VT3) and transistor (VT4), the collector of transistor (VT3) is connected with power supply, the grounded collector of transistor (VT4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200442736U CN201166795Y (en) | 2008-02-26 | 2008-02-26 | Temperature recognition device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200442736U CN201166795Y (en) | 2008-02-26 | 2008-02-26 | Temperature recognition device |
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| CN201166795Y true CN201166795Y (en) | 2008-12-17 |
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| CNU2008200442736U Expired - Lifetime CN201166795Y (en) | 2008-02-26 | 2008-02-26 | Temperature recognition device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102813460A (en) * | 2012-08-30 | 2012-12-12 | 厦门越一电子科技有限公司 | Boiling water identification circuit and tea tray of induction cooker |
| CN102999060A (en) * | 2012-05-13 | 2013-03-27 | 李祥龙 | Method and circuit for controlling automatic heating stop of water boiling induction cooker after boiling |
| CN103096550A (en) * | 2013-01-21 | 2013-05-08 | 董晓波 | Method and device of cooker heating control |
| CN110907059A (en) * | 2019-11-27 | 2020-03-24 | 广东美的厨房电器制造有限公司 | Temperature control method and device for electric appliance, electric appliance and computer readable storage medium |
| CN111093300A (en) * | 2019-12-28 | 2020-05-01 | 华南理工大学 | Microwave heating device based on music modulation |
| CN111157135A (en) * | 2020-01-20 | 2020-05-15 | 扬州大学 | Indirect measurement method for surface temperature of quenched part |
-
2008
- 2008-02-26 CN CNU2008200442736U patent/CN201166795Y/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102999060A (en) * | 2012-05-13 | 2013-03-27 | 李祥龙 | Method and circuit for controlling automatic heating stop of water boiling induction cooker after boiling |
| CN102813460A (en) * | 2012-08-30 | 2012-12-12 | 厦门越一电子科技有限公司 | Boiling water identification circuit and tea tray of induction cooker |
| CN103096550A (en) * | 2013-01-21 | 2013-05-08 | 董晓波 | Method and device of cooker heating control |
| CN110907059A (en) * | 2019-11-27 | 2020-03-24 | 广东美的厨房电器制造有限公司 | Temperature control method and device for electric appliance, electric appliance and computer readable storage medium |
| CN111093300A (en) * | 2019-12-28 | 2020-05-01 | 华南理工大学 | Microwave heating device based on music modulation |
| CN111093300B (en) * | 2019-12-28 | 2022-03-25 | 华南理工大学 | Microwave heating device based on music modulation |
| CN111157135A (en) * | 2020-01-20 | 2020-05-15 | 扬州大学 | Indirect measurement method for surface temperature of quenched part |
| CN111157135B (en) * | 2020-01-20 | 2021-06-04 | 扬州大学 | Indirect measurement method for surface temperature of quenched part |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: FOSHAN SHUNDE MIDEA ELECTRICAL HEATING APPLIANCES MANUFACTURING Co.,Ltd. Assignor: Midea Group Contract fulfillment period: 2008.12.27 to 2013.12.26 Contract record no.: 2009440000807 Denomination of utility model: Temperature recognition device Granted publication date: 20081217 License type: Exclusive license Record date: 20090724 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.12.27 TO 2013.12.26; CHANGE OF CONTRACT Name of requester: FOSHAN CITY SHUNDE DISTRICT MEDIA ELECTRIC HEATING Effective date: 20090724 |
|
| C56 | Change in the name or address of the patentee |
Owner name: MIDEA GROUP CO., LTD. Free format text: FORMER NAME: MEIDI GROUP CO. LTD. |
|
| CP03 | Change of name, title or address |
Address after: 528311 Guangdong, Foshan, Beijiao, the United States, the United States and the United States on the avenue of the United States, the headquarters of the United States building B floor, District, 26-28 Patentee after: MIDEA GROUP Co.,Ltd. Address before: 528311 Penglai Road, Beijiao Town, Foshan District, Guangdong, China, Patentee before: Midea Group |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20081217 |