CN2715455Y - Touch control induction circuit for induction cooker - Google Patents
Touch control induction circuit for induction cooker Download PDFInfo
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- CN2715455Y CN2715455Y CN 200420047169 CN200420047169U CN2715455Y CN 2715455 Y CN2715455 Y CN 2715455Y CN 200420047169 CN200420047169 CN 200420047169 CN 200420047169 U CN200420047169 U CN 200420047169U CN 2715455 Y CN2715455 Y CN 2715455Y
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- 230000006698 induction Effects 0.000 title claims abstract description 23
- 239000003990 capacitor Substances 0.000 claims abstract description 17
- 230000010354 integration Effects 0.000 claims description 13
- 239000004020 conductor Substances 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 229910052755 nonmetal Inorganic materials 0.000 claims description 4
- 230000003750 conditioning effect Effects 0.000 abstract 4
- 238000010586 diagram Methods 0.000 description 7
- 230000003321 amplification Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000003199 nucleic acid amplification method Methods 0.000 description 6
- 239000000615 nonconductor Substances 0.000 description 3
- 239000011521 glass Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 102220298895 rs1025502215 Human genes 0.000 description 1
- 102220007331 rs111033633 Human genes 0.000 description 1
- 102220279556 rs1305090923 Human genes 0.000 description 1
- 102220029901 rs140332992 Human genes 0.000 description 1
- 102220017114 rs150867836 Human genes 0.000 description 1
- 102220279244 rs1555053901 Human genes 0.000 description 1
- 102220029346 rs34541442 Human genes 0.000 description 1
- 102220012869 rs35689081 Human genes 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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Abstract
The utility model relates to a touch-control induction circuit who uses in electromagnetism stove. The device comprises an input conditioning circuit (11), an induction circuit (12) and an integral output circuit (13), wherein the input end of the induction circuit (12) is connected with the output end of the input conditioning circuit (11), and the output end of the induction circuit (12) is connected with the input end of the integral output circuit (13). The input conditioning circuit (11) comprises a resistor R1, a capacitor C1, a diode D1 and a diode D2, the sensing circuit (12) comprises a resistor R2 and a sensing sheet K, the integrating output circuit (13) comprises a resistor R3 and a capacitor C2, the input end of the input conditioning circuit (11) is a square wave signal, and the duty ratio is not less than 50%. When a finger touches the induction area of the induction sheet, the capacitance formed between the induction sheet and the finger can change the voltage of the output end of the integral output circuit (13), the change is amplified by the amplifying circuit and then is sampled and processed by the MCU, so that the finger touch signal is induced and identified as key information, and the operation control of the induction cooker is realized.
Description
Technical field
The utility model relates to the touch control induction circuit that uses in a kind of electromagnetic oven, relates in particular to a kind of use is experienced human body (particularly finger) activation signal and is identified as key information under the situation that is insulated material such as glass, pottery or plastic cement isolation touch control induction circuit.
Background technology
In people's productive life, various electric equipments all need to carry out alternately with the people.Existing is normally mechanical botton of mutual device with button, consider attractive in appearance and safety, in some cases, the mechanical type button is because must be at material surface (as glass or pottery etc.) perforate or fluting, the mechanical strength and the outward appearance of some material can be destroyed, the needs of use can't be satisfied.
The induction screen that now also has some to utilize infrared array, ultrasonic wave or make by special material with resistance, capacitance characteristic, because of its manufactured materials costliness, complex manufacturing, specification requirement is very high, so be not suitable on the small household electrical appliance of the easy consumption of low value.
Summary of the invention
The purpose of this utility model is to consider that the problems referred to above provide a kind of contact information that can sense human finger, and be converted into the variation of voltage signal, can discern by microcontroller, and then electromagnetic oven be operated the touch control induction circuit that is used for electromagnetic oven of control.The utility model simplicity of design, convenient and practical, be easy to realize, safe and reliable, with low cost.
The technical scheme that its technical problem that solves the utility model adopts is: schematic block circuit diagram of the present utility model as shown in Figure 1, include input modulate circuit (11), sensor circuit (12), integration output circuit (13), the input of wherein importing modulate circuit (11) is connected with the wave mode signal input part, the input of sensor circuit (12) is connected with the output of input modulate circuit (11), the output of sensor circuit (12) is connected with the input of integration output circuit (13), and the output of integration output circuit (13) is connected with multiplex electronics.
Above-mentioned input modulate circuit (11) includes resistance R 1, capacitor C 1, diode D1, D2, sensor circuit (12) includes resistance R 2 and sensing chip K, integration output circuit (13) includes resistance R 3, capacitor C 2, wherein the series circuit formed of resistance R 1 and capacitor C 1 again and diode D1 be connected in parallel between the negative electrode of wave mode signal input part IN and diode D2, the plus earth of diode D2, resistance R 2, the end of R3 is connected with the negative electrode of diode D2, the other end of resistance R 2 is connected with sensing chip K, the other end of resistance R 3 is connected with an end of capacitor C 2, the other end ground connection of C2, resistance R 3 is the output OUT that is connected with multiplex electronics with the public connecting end of capacitor C 2.
The wave mode signal of above-mentioned wave mode signal input part IN input is a square-wave signal.
The frequency of above-mentioned square-wave signal can be 10kHz～400kHz.
The duty ratio of above-mentioned square-wave signal is 50%～100%.
Above-mentioned touch-control sensing sheet K can be metal, nonmetal electric conductor.
When the Nonconductor surface that is contacted as touch-control sensing sheet K referred to that sense of touch answers the zone not point contact, the square wave of input input charged to C2 via R1, C1, R2; Also R2 and K branch road are charged simultaneously, the distributed capacitance of establishing the existence of touch-control sensing sheet K and Nonconductor surface is C
K1Because C
K1Minimum, very faint to the influence of circuit.
D1 carries out repid discharge when importing square wave for low level.D2 clamper A point voltage is not a negative pressure.
When the Nonconductor surface that is contacted as touch-control sensing sheet K refers to that sense of touch answers the zone that the finger contact is arranged, touch-control sensing sheet K with point between have a distributed capacitance C
K2, and C
K2＞＞C
K1Because C
K2Existence, R2, C
K2The voltage that A is ordered in the accompanying drawing 2 is descended, and correspondingly, the voltage of OUT end also can descend.
The voltage of OUT end descends and transfers to MCU after can amplifying by operational amplification circuit and carry out sampling processing, thereby can realize by the variation of voltage referring to the identification of the information of touching (comprise the contact of finger and leave).
The beneficial effects of the utility model are:
1, the utility model only is made up of some resistance, electric capacity and two diodes, the fairly simple practicality of circuit design, flexibility and reliability, with low cost, adaptability good.
2, to whether transparent no requirement (NR) of surfacing, to the different surfaces material, a parameter that only needs to adjust R2 gets final product.
3, touch-control sensing sheet K can be nonmetal electric conductors such as metal, conductive rubber, does not have other specific (special) requirements.
The utility model is a kind of simplicity of design, and is convenient and practical, is easy to realize, uses flexibly the touch control induction circuit that is used for electromagnetic oven safe and reliable, with low cost.
Description of drawings
Fig. 1 is a schematic block circuit diagram of the present utility model;
Fig. 2 is circuit theory diagrams of the present utility model;
Fig. 3 is the circuit theory diagrams that the utility model is used for electromagnetic oven.
Embodiment
Below in conjunction with drawings and Examples the utility model is further specified.
Schematic block circuit diagram of the present utility model as shown in Figure 1, include input modulate circuit (11), sensor circuit (12), integration output circuit (13), the input of wherein importing modulate circuit (11) is connected with the wave mode signal input part, the input of sensor circuit (12) is connected with the output of input modulate circuit (11), the output of sensor circuit (12) is connected with the input of integration output circuit (13), and the output of integration output circuit (13) is connected with multiplex electronics.
Circuit theory diagrams of the present utility model as shown in Figure 2, above-mentioned input modulate circuit (11) includes resistance R 1, capacitor C 1, diode D1, D2, sensor circuit (12) includes resistance R 2 and sensing chip K, integration output circuit (13) includes resistance R 3, capacitor C 2, wherein the series circuit formed of resistance R 1 and capacitor C 1 again and diode D1 be connected in parallel between the negative electrode of wave mode signal input part IN and diode D2, the plus earth of diode D2, resistance R 2, the end of R3 is connected with the negative electrode of diode D2, the other end of resistance R 2 is connected with sensing chip K, the other end of resistance R 3 is connected with an end of capacitor C 2, the other end ground connection of C2, resistance R 3 is the output OUT that is connected with multiplex electronics with the public connecting end of capacitor C 2.The wave mode signal of above-mentioned wave mode signal input part IN input is a square-wave signal, and the frequency of square-wave signal can be 10kHz～400kHz, and the duty ratio of square-wave signal is 50%～100%.
Above-mentioned touch-control sensing sheet K can be nonmetal electric conductors such as metal, conductive rubber.
The circuit theory diagrams that the utility model is used for electromagnetic oven as shown in Figure 3, each label is among the figure: square wave generation circuit 1, multiplex electronics 2, operational amplification circuit 3, MCU unit 4, input modulate circuit 11, sensor circuit 12, integration output circuit 13.
Utility model sensor circuit module is connected between square wave generation circuit (1) and the multiplex electronics (2).Wherein square wave generation circuit (1) utilizes the NE555 time-base circuit to produce the square wave that duty ratio is 80% 160kHz.Multiplex electronics (2) is actually and utilizes electronic switch that the touch-control sensing signal timesharing of N road is switched to operational amplification circuit (3), switches to be controlled by MCU unit (4).The output signal of operational amplification circuit (3) then is sent to MCU unit (4) and carries out analog-to-digital conversion, the supervision that MCU unit (4) changes by the output level to operational amplification circuit (3), whether whether can identify in the touch-control sensing of N road a certain induction region has the finger contact or discharges, and further be treated to and have " button " to press or unclamp.
Among the embodiment: R1=22k, R2=20k, R3=1M, C1=30pF, C2=0.1uF.U11 is NE555 or HA17555, R11=1k, R12=4.7k, C11=1000pF, C12=10000pF in the square wave generation circuit (1), and IN end incoming frequency is 160kHz, and duty ratio is 80%.The chip of selecting for use in the multiplex electronics (2) is 74HC4051,74HC4066 or CD4051, CD4066 etc.R31=1k, R32=1k, R33=4.7k, C31=1000pF, U31 are LM358 or LM324 etc. in the operational amplification circuit (3).MCU unit (4) is selected MC68HC908JL8 for use.
MCU unit (4) is also realized irony pan electromagnetic induction heating by monitor voltage, electric current, temperature, state-feedback circuit and temperature-sensitive heating arrangement simultaneously.
Claims (6)
1, a kind of touch control induction circuit that is used for electromagnetic oven, it is characterized in that including input modulate circuit (11), sensor circuit (12), integration output circuit (13), the input of wherein importing modulate circuit (11) is connected with the wave mode signal input part, the input of sensor circuit (12) is connected with the output of input modulate circuit (11), the output of sensor circuit (12) is connected with the input of integration output circuit (13), and the output of integration output circuit (13) is connected with multiplex electronics.
2, the touch control induction circuit that is used for electromagnetic oven according to claim 1, it is characterized in that above-mentioned input modulate circuit (11) includes resistance R 1, capacitor C 1, diode D1, D2, sensor circuit (12) includes resistance R 2 and sensing chip K, integration output circuit (13) includes resistance R 3, capacitor C 2, wherein the series circuit formed of resistance R 1 and capacitor C 1 again and diode D1 be connected in parallel between the negative electrode of wave mode signal input part IN and diode D2, the plus earth of diode D2, resistance R 2, the end of R3 is connected with the negative electrode of diode D2, the other end of resistance R 2 is connected with sensing chip K, the other end of resistance R 3 is connected with an end of capacitor C 2, the other end ground connection of C2, resistance R 3 is the output OUT that is connected with multiplex electronics with the public connecting end of capacitor C 2.
3, the touch control induction circuit that is used for electromagnetic oven according to claim 2 is characterized in that the wave mode signal of above-mentioned wave mode signal input part IN input is a square-wave signal.
4, the touch control induction circuit that is used for electromagnetic oven according to claim 3 is characterized in that the frequency of above-mentioned square-wave signal can be 10kHz～400kHz.
5, the touch control induction circuit that is used for electromagnetic oven according to claim 4, the duty ratio that it is characterized in that above-mentioned square-wave signal is 50%～100%.
6, the touch control induction circuit that is used for electromagnetic oven according to claim 4 is characterized in that above-mentioned touch-control sensing sheet K can be metal, nonmetal electric conductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420047169 CN2715455Y (en) | 2004-06-18 | 2004-06-18 | Touch control induction circuit for induction cooker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420047169 CN2715455Y (en) | 2004-06-18 | 2004-06-18 | Touch control induction circuit for induction cooker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2715455Y true CN2715455Y (en) | 2005-08-03 |
Family
ID=34872337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420047169 Expired - Fee Related CN2715455Y (en) | 2004-06-18 | 2004-06-18 | Touch control induction circuit for induction cooker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2715455Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100539768C (en) * | 2007-10-30 | 2009-09-09 | 深圳和而泰智能控制股份有限公司 | A kind of electromagnetic oven synchronisation control means and circuit thereof |
| CN102122222B (en) * | 2010-01-12 | 2013-06-19 | 速博思股份有限公司 | Capacitance type touch control panel device |
-
2004
- 2004-06-18 CN CN 200420047169 patent/CN2715455Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100539768C (en) * | 2007-10-30 | 2009-09-09 | 深圳和而泰智能控制股份有限公司 | A kind of electromagnetic oven synchronisation control means and circuit thereof |
| CN102122222B (en) * | 2010-01-12 | 2013-06-19 | 速博思股份有限公司 | Capacitance type touch control panel device |
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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 Penglai Road, Beijiao Town, Foshan District, Guangdong, China, Patentee before: Midea Group |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050803 Termination date: 20130618 |