CN101192335A - Wireless emission accurate temperature measurement circuit for pot - Google Patents
Wireless emission accurate temperature measurement circuit for pot Download PDFInfo
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- CN101192335A CN101192335A CNA2006101548555A CN200610154855A CN101192335A CN 101192335 A CN101192335 A CN 101192335A CN A2006101548555 A CNA2006101548555 A CN A2006101548555A CN 200610154855 A CN200610154855 A CN 200610154855A CN 101192335 A CN101192335 A CN 101192335A
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- resistance
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Abstract
The invention relates to a wireless emission accurate temperature measurement circuit for a cooker which consists of a temperature acquisition resistor and a temperature acquisition circuit which is connected to the body of the cooker. The temperature acquisition resistor is connected to the temperature acquisition circuit and the temperature acquisition resistor and temperature acquisition circuit are installed on the cooker. The temperature acquisition circuit comprises a wave-form generator which outputs the wave signals which obtains the frequency corresponding to the resistor after different inputs of the resistor, a signal amplification circuit and a wireless emission circuit. The temperature acquisition resistor is connected to the input of the wave-form generator; the wave-form generator is connected to the signal amplification circuit and the signal amplification circuit is connected to the wireless emission circuit. The invention provides a wireless emission accurate temperature measurement circuit for a cooker, which can simplify the circuit and reduce the cost.
Description
Technical field
The present invention relates to the articles for daily use technical field, especially a kind of electromagnetic oven pan temperature measurement circuit.
Background technology
Electromagnetic oven is a kind of kitchen appliance commonly used, is widely used at present.Electromagnetic oven is along with the development of technology, requires to realize more intelligentization, has only more grasp pan in the temperature in each stage, could improve the accuracy of each intelligent function.The temperature sampling resistance of existing electromagnetic oven is placed on below the magnetic sheet of electromagnetic oven more, and the temperature that measures is that pan just passes to temperature sampling resistance through magnetic sheet.The different temperature that are difficult to measure accurately pan of material because of pan.The multiple intelligent function of electromagnetic oven is made a mistake.As automatic function to boil water,, require electromagnetic oven will stop heating automatically when the temperature of pot reaches 100 when spending.Traditional thermometric mode error is too many, do not shut down after causing water to open, or water is not just opened and shut down.Directly influence the use of electromagnetic oven automatic function.
As number of patent application is the Chinese invention patent application of CN200310121105.4, a kind of wireless temperature measurement pan is disclosed, comprise a pot body, temperature sensing circuit and temperature-control circuit, it is characterized in that: also comprise one group of wireless launcher and radio receiver, described temperature sensing circuit is located at pot surface and is electrically connected with wireless launcher, and described radio receiver is electrically connected with temperature-control circuit.Between temperature sensing circuit and wireless launcher, add A/D change-over circuit and scrambler, in wireless receiving circuit, add demoder.The shortcoming that exists is: 1, need the conversion with AD, coding and decoding causes circuit complexity, cost higher; 2, need add power supply in addition and power to complete machine, can cause thermometric inaccurate in use because of the electric weight deficiency, radiating circuit does not have problems such as emission, makes troubles to use.
Summary of the invention
In order to overcome the higher deficiency of circuit complexity, cost of existing electromagnetic oven temperature measurement circuit, the invention provides a kind of wireless emission accurate temperature measurement circuit for pot of simplifying circuit, saving cost.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of wireless emission accurate temperature measurement circuit for pot, comprise temperature acquisition resistance, the temperature collection circuit that is connected with the main frame of pan, described temperature acquisition resistance is electrically connected with temperature collection circuit, described temperature acquisition resistance and temperature collection circuit are installed on the pan, described temperature collection circuit comprises the waveform generator of the waveform signal output of the frequency that obtains becoming with resistance corresponding relation after being used for different resistance imports, signal amplification circuit and radio transmitter, described temperature acquisition resistance connects the input end of waveform generator, described waveform generator connects signal amplification circuit, and described signal amplification circuit connects radio transmitter.
As preferred a kind of scheme: described waveform generator is a square wave generation circuit, described square wave generation circuit comprises 555 modules and capacitor C 1, described temperature acquisition resistance R 1 forms the RC charging and discharging circuit with capacitor C 1 and is connected with the input end of 555 modules, and the output terminal of 555 modules is connected with driving triode Q1 through resistance R 3.
As preferred another kind of scheme: described temperature measurement circuit for pot also comprises the automatic induced voltage loop that is used for inductive electromagnetic stove leakage field, and described automatic induced voltage loop is electrically connected with waveform generator, radio transmitter.
Further, described automatic induced voltage loop comprises automatic inductive sensor L, current rectifying and wave filtering circuit, and the output of described current rectifying and wave filtering circuit connects the power end of waveform generator, radio transmitter.
Further again, described automatic induced voltage loop also comprises mu balanced circuit, and the output of described current rectifying and wave filtering circuit connects mu balanced circuit, and the output of described mu balanced circuit connects the power end of waveform generator, radio transmitter.
Described radio transmitter comprises infrared emission circuit, emission driving circuit, and the output terminal of described waveform generator is connected with the infrared emission circuit through the emission driving circuit.
Technical conceive of the present invention is: the radiation pattern of having abandoned available technology adopting A/D change-over circuit and scrambler, the Promethean conversion that utilizes the resistance value and the frequency of temperature sampling resistance, temperature sampling resistance and electric capacity are engaged in and produce waveform signal in the waveform generator, temperature sampling resistance with the change resistance of temperature also along with change, resistance has changed the RC duration of charging of waveform generator when changing, the frequency of output waveform that makes waveform generator is also along with change.Then the output frequency of Waveform generating circuit just can be judged the temperature that temperature sampling resistance is measured.Radio transmitter is the communicating circuit between pan and the electromagnetic oven, and the temperature value of temperature sampling resistance converts the frequency of certain waveform to, is transmitted to the electromagnetic oven main frame by radio transmitter.The infrared receiving circuit of electromagnetic oven main frame is according to the waveform that receives, and according to the corresponding relation of temperature, resistance value and the frequency of sampling resistor, is provided with the corresponding relation with frequency and temperature in the main frame, and the frequency of foundation reception is made the judgement to the pan temperature.
The present invention utilizes ultrared directivity because of with the actual communication of infrared ray, has avoided the problem of two pan phase mutual interference of working simultaneously, need not the Code And Decode circuit between pan and the main frame electromagnetic oven, and pan and main frame can be realized function one to one.No AD sample circuit directly becomes available waveform with the voltage transitions on the thermistor, and circuit is simple, saves cost.
Adopt inductance self-inducting power supply, as long as electromagnetic oven is being worked, this power supply energy is continuing always, has guaranteed the work that radiating circuit is safe and reliable; Need not to add in addition power supply, avoid causing the problem that whole temperature measurement circuit can't operate as normal because of the power supply deficiency.
Beneficial effect of the present invention mainly shows: 1, simplify circuit, save cost; 2, two pan phase mutual interference of working have simultaneously been avoided; 3, utilize the magnetic field of electromagnetic oven main frame to convert electric energy to and come to need not to add in addition power supply, avoid the variety of issue that causes because of electricity shortage because of radiating circuit to the radiating circuit power supply.
Description of drawings
Fig. 1 is the theory diagram of temperature measurement circuit for pot.
The circuit diagram of Fig. 2 temperature measurement circuit for pot of the present invention.
Fig. 3 is the synoptic diagram of infrared receiving circuit of the main frame of electromagnetic oven.
Embodiment
Below in conjunction with accompanying drawing the present invention is further described.
With reference to Fig. 1, Fig. 2 and Fig. 3, a kind of wireless emission accurate temperature measurement circuit for pot, comprise temperature acquisition resistance R 1, the temperature collection circuit 1 that is connected with the main frame of pan, described temperature acquisition resistance R 1 is electrically connected with temperature collection circuit 1, described temperature acquisition resistance R 1 and temperature collection circuit 1 are installed on the pan, described temperature collection circuit 1 comprises the waveform generator 2 of the waveform signal output of the frequency that obtains becoming with resistance corresponding relation after being used for different resistance imports, signal amplification circuit 3 and radio transmitter 4, described temperature acquisition resistance R 1 connects the input end of waveform generator 2, described waveform generator 2 connects signal amplification circuit 3, and described signal amplification circuit 3 connects radio transmitter 4.
Described waveform generator 2 is a square wave generation circuit, described square wave generation circuit comprises 555 modules and capacitor C 1, described temperature acquisition resistance R 1 forms the RC charging and discharging circuit with capacitor C 1 and is connected with the input end of 555 modules, and the output terminal of 555 modules is connected with driving triode Q1 through resistance R 3.
Described temperature measurement circuit for pot also comprises the automatic induced voltage loop that is used for inductive electromagnetic stove leakage field, described automatic induced voltage loop comprises automatic inductive sensor L, current rectifying and wave filtering circuit 5, mu balanced circuit 6, described automatic inductive sensor L connects the input end of current rectifying and wave filtering circuit 5, the output of described current rectifying and wave filtering circuit 5 connects mu balanced circuit 6, and the output of described mu balanced circuit 6 connects the power end of waveform generator 2, radio transmitter 4.
Described radio transmitter 4 comprises infrared emission circuit, emission driving circuit, and the output terminal of described waveform generator 2 is connected with the infrared emission circuit through the emission driving circuit.
In the present embodiment, automatically inductive sensor L1 can sense voltage when electromagnetic oven heating, after the voltage commutation filtering of current rectifying and wave filtering circuit with automatic inductive sensor two ends, obtain a more level and smooth direct current, this DC voltage obtains a galvanic current and presses to 555 module for power supply again through three-terminal voltage-stabilizing IC voltage stabilizing after the voltage stabilizing.Temperature sampling resistance R 1, with resistance R 2, capacitor C 1, form the RC charging and discharging circuit, the resistance of temperature sampling resistance R 1 is along with temperature variation, when temperature rises, resistance diminishes, and the variation of resistance changes the constant that RC discharges and recharges, and the frequency of 555 module pin output is also along with change.555 modules link to each other through resistance R 3 with the driving triode Q1 of infrared transmitter, when the square wave output of 3 pin of 555 modules through resistance R 3, pass to after triode Q1 amplifies square-wave signal triode Q2 thus triode promote infrared emission tube with square-wave signal, be transmitted to the electromagnetic oven main frame and receive head.Electromagnetic oven main frame receiving circuit 7 is judged the temperature of pan after main frame IC8 analyzes according to the square wave frequency of being received.
Claims (6)
1. wireless emission accurate temperature measurement circuit for pot, comprise temperature acquisition resistance, the temperature collection circuit that is connected with the main frame of pan, described temperature acquisition resistance is electrically connected with temperature collection circuit, it is characterized in that: described temperature acquisition resistance and temperature collection circuit are installed on the pan, described temperature collection circuit comprises the waveform generator of the waveform signal output of the frequency that obtains becoming with resistance corresponding relation after being used for different resistance imports, signal amplification circuit and radio transmitter, described temperature acquisition resistance connects the input end of waveform generator, described waveform generator connects signal amplification circuit, and described signal amplification circuit connects radio transmitter.
2. wireless emission accurate temperature measurement circuit for pot as claimed in claim 1, it is characterized in that: described waveform generator is a square wave generation circuit, described square wave generation circuit comprises 555 modules and capacitor C 1, described temperature acquisition resistance R 1 forms the RC charging and discharging circuit with capacitor C 1 and is connected with the input end of 555 modules, and the output terminal of 555 modules is connected with driving triode Q1 through resistance R 3.
3. wireless emission accurate temperature measurement circuit for pot as claimed in claim 1, it is characterized in that: described temperature measurement circuit for pot also comprises the automatic induced voltage loop that is used for inductive electromagnetic stove leakage field, and described automatic induced voltage loop is electrically connected with waveform generator, radio transmitter.
4. wireless emission accurate temperature measurement circuit for pot as claimed in claim 3, it is characterized in that: described automatic induced voltage loop comprises automatic inductive sensor L, current rectifying and wave filtering circuit, described automatic inductive sensor L connects the input end of current rectifying and wave filtering circuit, and the output of described current rectifying and wave filtering circuit connects the power end of waveform generator, radio transmitter.
5. wireless emission accurate temperature measurement circuit for pot as claimed in claim 4, it is characterized in that: described automatic induced voltage loop also comprises mu balanced circuit, the output of described current rectifying and wave filtering circuit connects mu balanced circuit, and the output of described mu balanced circuit connects the power end of waveform generator, radio transmitter.
6. as the described wireless emission accurate temperature measurement circuit for pot of one of claim 1-5, it is characterized in that: described radio transmitter comprises infrared emission circuit, emission driving circuit, and the output terminal of described waveform generator is connected with the infrared emission circuit through the emission driving circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101548555A CN101192335A (en) | 2006-11-25 | 2006-11-25 | Wireless emission accurate temperature measurement circuit for pot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101548555A CN101192335A (en) | 2006-11-25 | 2006-11-25 | Wireless emission accurate temperature measurement circuit for pot |
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| Publication Number | Publication Date |
|---|---|
| CN101192335A true CN101192335A (en) | 2008-06-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006101548555A Pending CN101192335A (en) | 2006-11-25 | 2006-11-25 | Wireless emission accurate temperature measurement circuit for pot |
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| CN (1) | CN101192335A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101936554A (en) * | 2010-08-31 | 2011-01-05 | 浙江苏泊尔家电制造有限公司 | Wireless temperature measuring device for induction cooker |
| CN103728044A (en) * | 2014-01-17 | 2014-04-16 | 厦门大学 | Contact type high-voltage electrical equipment temperature detection system |
| CN104536491A (en) * | 2014-12-19 | 2015-04-22 | 湖南水口山有色金属集团有限公司 | Temperature control circuit |
| CN105606256A (en) * | 2016-02-16 | 2016-05-25 | 浙江绍兴苏泊尔生活电器有限公司 | Wireless temperature measurement method and cooker |
| CN107212751A (en) * | 2017-07-28 | 2017-09-29 | 成都华津时代科技股份有限公司 | A kind of intelligence drinking-water terminal |
| CN108225579A (en) * | 2016-12-21 | 2018-06-29 | 佛山市顺德区美的电热电器制造有限公司 | Household electrical appliance, wireless temperature measurement system and its temperature checking method |
-
2006
- 2006-11-25 CN CNA2006101548555A patent/CN101192335A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101936554A (en) * | 2010-08-31 | 2011-01-05 | 浙江苏泊尔家电制造有限公司 | Wireless temperature measuring device for induction cooker |
| CN101936554B (en) * | 2010-08-31 | 2015-09-09 | 浙江苏泊尔家电制造有限公司 | A kind of wireless temperature measuring device for induction cooker |
| CN103728044A (en) * | 2014-01-17 | 2014-04-16 | 厦门大学 | Contact type high-voltage electrical equipment temperature detection system |
| CN104536491A (en) * | 2014-12-19 | 2015-04-22 | 湖南水口山有色金属集团有限公司 | Temperature control circuit |
| CN105606256A (en) * | 2016-02-16 | 2016-05-25 | 浙江绍兴苏泊尔生活电器有限公司 | Wireless temperature measurement method and cooker |
| CN105606256B (en) * | 2016-02-16 | 2018-07-31 | 浙江绍兴苏泊尔生活电器有限公司 | Wireless temperature measurement method and cooker |
| CN108225579A (en) * | 2016-12-21 | 2018-06-29 | 佛山市顺德区美的电热电器制造有限公司 | Household electrical appliance, wireless temperature measurement system and its temperature checking method |
| CN107212751A (en) * | 2017-07-28 | 2017-09-29 | 成都华津时代科技股份有限公司 | A kind of intelligence drinking-water terminal |
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Open date: 20080604 |