CN201238405Y - Touch control induction circuit of induction cooker - Google Patents
Touch control induction circuit of induction cooker Download PDFInfo
- Publication number
- CN201238405Y CN201238405Y CNU2008200473274U CN200820047327U CN201238405Y CN 201238405 Y CN201238405 Y CN 201238405Y CN U2008200473274 U CNU2008200473274 U CN U2008200473274U CN 200820047327 U CN200820047327 U CN 200820047327U CN 201238405 Y CN201238405 Y CN 201238405Y
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- mcu
- processing unit
- central processing
- touch
- resistance
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- 230000006698 induction Effects 0.000 title claims abstract description 44
- 239000004020 conductor Substances 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 229910052755 nonmetal Inorganic materials 0.000 claims description 2
- 230000003750 conditioning effect Effects 0.000 abstract description 5
- 230000035945 sensitivity Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 239000003990 capacitor Substances 0.000 description 17
- 238000010586 diagram Methods 0.000 description 3
- 230000010354 integration Effects 0.000 description 3
- 238000005070 sampling Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000000615 nonconductor Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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Abstract
The touch sensing circuit of the induction cooker is characterized by comprising a plurality of touch sensing circuit modules and a central processing unit (MCU) which are connected in parallel, wherein the input end of each touch sensing circuit module receives a square wave signal generated by the central processing unit (MCU), the output end of each touch sensing circuit module is connected with the central processing unit (MCU) or connected with the central processing unit (MCU) through a Multiplexer (MUX), each touch sensing circuit module comprises an input conditioning circuit and a touch sensing circuit, the input end of the input conditioning circuit receives the square wave signal generated by the central processing unit (MCU), the output end of the input conditioning circuit is connected with the input end of the touch sensing circuit, and the output end of the touch sensing circuit is connected with the central processing unit (MCU) or connected with the central processing unit. Compared with the prior art, the utility model has the advantages of simple circuit, low manufacturing cost, safety, reliability and high sensitivity; in addition, for different surface materials, only the parameters of the touch sensing circuit need to be adjusted.
Description
Technical field:
The utility model relates to a kind of touch control induction circuit of electromagnetic oven, the particularly a kind of touch control induction circuit that can experience human body (particularly finger) activation signal and be identified as key information under the situation that glass, pottery or plastic cement are isolated.
Background technology
A kind of touch control induction circuit of electromagnetic oven is disclosed in the Chinese patent 200420047169.4 of the applicant's application, include the input modulate circuit, sensor circuit, the integration output circuit, the input of wherein importing modulate circuit is connected with the wave mode signal input part, the input of sensor circuit is connected with the output of input modulate circuit, the output of sensor circuit is connected with the input of integration output circuit, the output of integration output circuit is connected with multiplex electronics, this circuit is more owing to relating to electronic devices and components, therefore, its sensitivity and poor stability, and cost height.
The utility model content
The purpose of this utility model is to overcome above-mentioned defective and provides a kind of cost low, safe and reliable, the touch control induction circuit of the electromagnetic oven that sensitivity is high.
The technical solution of the utility model is: a kind of touch control induction circuit of electromagnetic oven, the touch control induction circuit module and the central processor MCU that comprise some parallel connections, the input of each touch control induction circuit module receives the square-wave signal that is produced by central processor MCU, its output is connected with central processor MCU or is connected with central processor MCU by multiplexer MUX, wherein the touch control induction circuit module comprises input modulate circuit and touch induction circuit, the input of described input modulate circuit receives the square-wave signal that is produced by central processor MCU, output is connected with the input of touch induction circuit, and the output of touch induction circuit is connected with central processor MCU or is connected with central processor MCU by multiplexer MUX.
Above-mentioned input modulate circuit comprises resistance R 1 and capacitor C 1, the waveform signal output of one termination central processor MCU of resistance R 1, capacitor C 1 one ends of another termination, and the value of resistance R 1 can be infinitely small, and the input of sensor circuit is touched in the other end contact of capacitor C 1.
Above-mentioned touch induction circuit includes touch-control sensing sheet K, resistance R 2, resistance R 3, diode D1 and capacitor C 2, touch sensible sheet K is connected with an end of resistance R 2 and the negative electrode of diode D1, the plus earth of diode D1, the other end of resistance R 2 is connected with an end of capacitor C 2, the other end ground connection of capacitor C 2, resistance R 3 is connected in parallel on capacitor C 2 two ends, and the common port of resistance R 2, resistance R 3 and capacitor C 2 is connected with central processor MCU or is connected with central processor MCU by multiplexer MUX.
Above-mentioned touch-control sensing sheet K can be metal or nonmetal electric conductor.
The frequency of the square-wave signal waveform that above-mentioned central processor MCU produces is 200KHZ～1MHZ, and duty ratio is 30%～90%, and this signal can be interrupted output.
The utility model is owing to adopt the touch control induction circuit module to include only input modulate circuit and touch induction circuit, the input of input modulate circuit receives the square-wave signal that is produced by central processor MCU, output is connected with the input of touch induction circuit, the circuit that the output of touch induction circuit is connected with central processor MCU, therefore, it is compared with prior art, not only circuit is simple, cost of manufacture is low, and safe and reliable, the sensitivity height; In addition, for the different surfaces material, the parameter that only needs to adjust touch induction circuit gets final product.
Description of drawings:
Fig. 1 is a circuit diagram of the present utility model;
Fig. 2 is the circuit block diagram of input conditioning circuit module of the present utility model;
Fig. 3 is the circuit diagram of input conditioning circuit module of the present utility model.
Embodiment:
Below in conjunction with drawings and Examples the utility model is further described.
Circuit of the present utility model as shown in Figure 1, the touch control induction circuit module 1 and the central processor MCU that comprise 3 parallel connections, the input of each touch control induction circuit module 1 receives the square-wave signal that is produced by central processor MCU, its output is connected with central processor MCU by multiplexer MUX, wherein touch control induction circuit module 1 comprises input modulate circuit 11 and touch induction circuit 12, the input of described input modulate circuit 11 receives the square-wave signal that is produced by central processor MCU, output is connected with the input of touch induction circuit 12, and the output of touch induction circuit 12 is connected with central processor MCU by multiplexer MUX.
11 pairs of square-wave signal adjustment of above-mentioned input modulate circuit are to adapt to the central processor MCU sampling request.The input of touch induction circuit 12 is a pulse signal, when finger touches the sensing chip K of touch induction circuit 12, the electric capacity that forms between sensing chip and finger can make the change in voltage of output, this variation is sent to central processor MCU through multiplexer MUX again and samples, realization is identified as key information with the finger touch induction of signal, and to electromagnetic oven operation control.Multiplexer MUX is actually and utilizes electronic switch that the timesharing of multichannel touch control unit signal is switched to central processor MCU to carry out signal processing, and switching is to be subjected to the control of central processor MCU unit.
As shown in Figure 2, above-mentioned touch induction circuit 12 includes touch-control sensing sheet K, resistance R 2, resistance R 3, diode D1 and capacitor C 2, touch sensible sheet K is connected with an end of resistance R 2 and the negative electrode of diode D1, the plus earth of diode D1, the other end of resistance R 2 is connected with an end of capacitor C 2, the other end ground connection of capacitor C 2, resistance R 3 are connected in parallel on capacitor C 2 two ends, and the common port of resistance R 2, resistance R 3 and capacitor C 2 is connected with central processor MCU by multiplexer MUX.In the present embodiment, above-mentioned touch-control sensing sheet K adopts conductive rubber.
Above-mentioned modulate circuit 1 comprises resistance R 1 and capacitor C 1, one termination of resistance R 1 is received the square-wave signal of the 500KHZ that is produced by central processing unit, the square-wave signal duty ratio is 50%, it can be interrupted output, for example in the time of 100MS, preceding 50MS has signal output, back 50MS no signal output, signal output is perhaps all arranged always, the other end of resistance R 1 is connected with capacitor C 1 one ends, and the value of resistance R 1 can be infinitely small, and the input of sensor circuit is touched in the other end contact of capacitor C 1, i.e. the common port of contact control sensing chip K, resistance R 2 and diode D1.
When the utility model uses, when the touch-surface induction region of touch-control sensing sheet K indication is not pointed contact, the signal of input input charges via capacitor C 1, C2 and 1 pair of resistance R 2 of resistance R, also touch-control sensing sheet K branch road is charged simultaneously, diode D1 plays rectification, resistance R 3 can play the effect of the slope of regulating the output voltage variation, and the distributed capacitance that setting touch sensing chip K and Nonconductor surface exist is C
K1, because C
K1Minimum, very faint to the influence of circuit;
When the touch-surface induction region that is contacted as touch-control sensing sheet K has the finger contact, touch-control sensing sheet K with point between have distributed capacitance C
K2, and C is arranged
K2C
K1Because C
K2Existence, the voltage of output is descended.The voltage of output descends and is sent to central processing unit through multiplexer and carries out sampling processing, thereby can realize by the variation of voltage referring to the identification of the information of touching (contact that comprises finger with leave).
Claims (4)
1, a kind of touch control induction circuit of electromagnetic oven, it is characterized in that comprising the touch control induction circuit module (1) and the central processing unit (MCU) of some parallel connections, the input of each touch control induction circuit module (1) receives the square-wave signal that is produced by central processing unit (MCU), its output is connected with central processing unit (MCU) or is connected with central processing unit (MCU) by multiplexer (MUX), wherein touch control induction circuit module (1) comprises input modulate circuit (11) and touch induction circuit (12), the input of described input modulate circuit (11) receives the square-wave signal that is produced by central processing unit (MCU), output is connected with the input of touch induction circuit (12), and the output of touch induction circuit (12) is connected with central processing unit (MCU) or is connected with central processing unit (MCU) by multiplexer (MUX).
2, the touch control induction circuit of electromagnetic oven according to claim 1, it is characterized in that above-mentioned input modulate circuit (1) comprises resistance (R1) and electric capacity (C1), the waveform signal output of one termination central processing unit (MCU) of resistance (R1), the other end is connected with electric capacity (C1) end, and the value of resistance (R1) can be infinitely small, and the input of sensor circuit (12) is touched in the other end contact of electric capacity (C1).
3, the touch control induction circuit of electromagnetic oven according to claim 1, it is characterized in that above-mentioned touch induction circuit (12) includes touch-control sensing sheet (K), resistance (R2), resistance (R3), diode (D1) and electric capacity (C2), touch sensible sheet (K) is connected with an end of resistance (R2) and the negative electrode of diode (D1), the plus earth of diode (D1), the other end of resistance (R2) is connected with an end of electric capacity (C2), the other end ground connection of electric capacity (C2), resistance (R3) is connected in parallel on electric capacity (C2) two ends, resistance (R2), the common port of resistance (R3) and electric capacity (C2) is connected with central processing unit (MCU) or is connected with central processing unit (MCU) by multiplexer (MUX).
4, the touch control induction circuit of electromagnetic oven according to claim 3 is characterized in that above-mentioned touch-control sensing sheet (K) can be metal or nonmetal electric conductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200473274U CN201238405Y (en) | 2008-05-01 | 2008-05-01 | Touch control induction circuit of induction cooker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200473274U CN201238405Y (en) | 2008-05-01 | 2008-05-01 | Touch control induction circuit of induction cooker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201238405Y true CN201238405Y (en) | 2009-05-13 |
Family
ID=40651137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200473274U Expired - Lifetime CN201238405Y (en) | 2008-05-01 | 2008-05-01 | Touch control induction circuit of induction cooker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201238405Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101977048A (en) * | 2010-11-03 | 2011-02-16 | 苏州合欣美电子科技有限公司 | Induction touch switch circuit having crash resistant function |
| CN102385451A (en) * | 2010-12-29 | 2012-03-21 | 深圳市鑫汇科电子有限公司 | Luminous band display type sliding touch bar and display method of touch luminous band |
| CN102394622A (en) * | 2011-09-16 | 2012-03-28 | 东莞康特尔电子有限公司 | Capacitive touch key and key judging method thereof |
| CN105306038A (en) * | 2015-11-02 | 2016-02-03 | 浙江漫思网络科技有限公司 | Capacitive sensing touch control key and key judging method thereof |
| CN107228392A (en) * | 2017-05-04 | 2017-10-03 | 安徽庆恒信息科技有限公司 | Intelligent electromagnetic oven |
-
2008
- 2008-05-01 CN CNU2008200473274U patent/CN201238405Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101977048A (en) * | 2010-11-03 | 2011-02-16 | 苏州合欣美电子科技有限公司 | Induction touch switch circuit having crash resistant function |
| CN102385451A (en) * | 2010-12-29 | 2012-03-21 | 深圳市鑫汇科电子有限公司 | Luminous band display type sliding touch bar and display method of touch luminous band |
| CN102385451B (en) * | 2010-12-29 | 2013-12-18 | 深圳市鑫汇科电子有限公司 | Luminous band display type sliding touch bar and display method of touch luminous band |
| CN102394622A (en) * | 2011-09-16 | 2012-03-28 | 东莞康特尔电子有限公司 | Capacitive touch key and key judging method thereof |
| CN102394622B (en) * | 2011-09-16 | 2014-03-19 | 东莞康特尔电子有限公司 | Capacitive touch key and key judging method thereof |
| CN105306038A (en) * | 2015-11-02 | 2016-02-03 | 浙江漫思网络科技有限公司 | Capacitive sensing touch control key and key judging method thereof |
| CN107228392A (en) * | 2017-05-04 | 2017-10-03 | 安徽庆恒信息科技有限公司 | Intelligent electromagnetic oven |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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 Foshan, Shunde District, Beijiao Town, Penglai Road, the United States Industrial City Patentee before: Midea Group |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090513 |