CN201294510Y - Touch key device - Google Patents
Touch key device Download PDFInfo
- Publication number
- CN201294510Y CN201294510Y CNU2008203023594U CN200820302359U CN201294510Y CN 201294510 Y CN201294510 Y CN 201294510Y CN U2008203023594 U CNU2008203023594 U CN U2008203023594U CN 200820302359 U CN200820302359 U CN 200820302359U CN 201294510 Y CN201294510 Y CN 201294510Y
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- mcu
- sensitivity
- press
- electric capacity
- touch key
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Abstract
The utility model relates to a device of touching key-presses relating to a touching key-press, in particular to a device of touching key-presses, which is capable of automatically adjusting the sensitivity. The utility model provides the device of touching key-presses aiming at the problem that the adjustment of the sensitivity of the touching key-presses needs to turn off the power of a system and dismount a circuit board, which is inconvenient. The device comprises an MCU, a touching key-press control chip and a touching key-press inductive surface, wherein the MCU is connected with the touching key-press inductive surface through the touching key-press control chip, and the device further comprises a sensitivity adjusting signal unit and a sensitivity adjusting device, wherein the sensitivity adjusting signal unit is connected with the MCU, and the MCU is connected with the touching key-press control chip through the sensitivity adjusting device. The device has the beneficial effects that the sensitivity of the key-presses can be automatically adjusted in a wide range by the touching key-presses under the condition that the power supply of the system is uninterrupted, and simultaneously the inconvenience of turning off the power supply of the system and dismounting the circuit board to replace a sensitivity capacitance is avoided.
Description
Technical field
The utility model relates to touch key-press, the particularly a kind of touch button device that can regulate sensitivity automatically.
Background technology
At present, capacitance type touch key does not have mechanical contact and very easily has been widely used in all kinds of high-grade electronic products with advantages such as structural member cooperate owing to it.Touch button device, generally comprise MCU, touch key-press control chip, touch key-press sensitive surface, the touch key-press sensitive surface is transferred to MCU with user's touch information by the touch key-press control chip, and MCU converts the function corresponding operational order to according to user's touch information.The button sensitivity of touch key-press is very important performance parameter.Usually under certain environment, select a suitable sensitivity control capacittance capacity, utilize touch key-press control chip self calibration and the software mode such as before powering on, regulate that powers on to realize.But a lot of experiments show in the touch button device of adjusting the sensitivity capacitance, when character of temperature, humidity, touch key-press sensitive surface etc. changes, current capacitance just can not provide suitable sensitivity, this just need readjust the sensitivity capacitance of touch key-press, at this moment need re-power and dismantle down circuit board to system usually and change suitable sensitivity electric capacity, to reach suitable sensitivity.
The utility model content
Technical problem to be solved in the utility model is, a kind of touch button device is provided, can be under the situation of not cutting off system power supply, finish adjusting by MCU to the sensitivity of touch key-press.
The technical scheme that the utility model solve the technical problem employing is, a kind of touch button device comprises MCU, the touch key-press control chip, and the touch key-press sensitive surface, MCU links to each other with the touch key-press sensitive surface by the touch key-press control chip; It is characterized in that, also comprise the sensitivity-adjusted signal unit, switch-operated response control, described sensitivity-adjusted signal unit links to each other with MCU, and described MCU links to each other with the touch key-press control chip by switch-operated response control.
The beneficial effects of the utility model are, touch key-press can be adjusted button sensitivity on a large scale automatically under the situation that system does not cut off the power supply, avoided simultaneously system is cut off the power supply and dismantles the inconvenience that circuit board is changed sensitivity electric capacity, also improved the applicable scope of same circuit board, avoided producing the situation of different printed boards for varying environment.
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail.
Description of drawings
Fig. 1 is a connection block diagram of the present utility model.
Fig. 2 is the circuit diagram of embodiment 1.
Fig. 3 is the control flow chart of embodiment 1.
Fig. 4 is the control flow chart of embodiment 2.
Embodiment
Touch button device of the present utility model comprises the sensitivity-adjusted signal unit, MCU, and the touch key-press control chip, switch-operated response control, electronic switch is regulated indicator light, the touch key-press sensitive surface; The sensitivity-adjusted signal unit links to each other with MCU, MCU links to each other with the touch key-press control chip by switch-operated response control, MCU links to each other with the touch key-press control chip by electronic switch, regulates indicator light and links to each other with MCU, and MCU links to each other with the touch key-press sensitive surface by the touch key-press control chip.Wherein the output signal of sensitivity-adjusted signal unit can be the output signal of control of remote controller signal or humidity sensor.Switch-operated response control is made of simulation MUX and electric capacity, the simulation MUX connects the electric capacity of different capabilities, at different environmental conditions, the electric capacity of each different capabilities that the simulation MUX connects is in order to guarantee the suitable sensitivity of touch key-press under different environmental conditions.For example simulate the electric capacity of 4 gears of MUX connection, to adapt under the varying environment condition, touch key-press is to the demand of suitable sensitivity.MCU sends the selection instruction of selecting the electric capacity gear according to sensitivity-adjusted signal to the simulation MUX, and the simulation MUX is connected selected electric capacity according to the selection instruction of MCU.More accurate if desired sensitivity is regulated, and then sets the electric capacity of more a plurality of gears, the electric capacity difference of each gear set smaller getting final product.When MCU sends instruction to switch-operated response control, MCU sends instruction to electronic switch simultaneously, electronic switch blocks the power supply of touch key-press control chip, and the simulation MUX is sent corresponding instruction select the suitable capacitance gear, after treating that adjusting is finished, the power supply of MCU control electronic switch conducting touch key-press control chip makes the touch button device operate as normal.In addition, when carrying out touch key-press sensitivity adjusting, MCU lights the adjusting indicator light, finishes after the sensitivity adjusting, and MCU extinguishes the adjusting indicator light.
Carry out the sensitivity adjusting according to the sensitivity-adjusted signal that remote controller provides, circuit diagram is referring to Fig. 2, and the model of touch key-press control chip is selected WIC8-BCD for use, and electronic switch is triode Q, and the model of simulation MUX chip is selected 74HC4051 for use.MCU is provided with the remote controller signal receiving port, is used to receive the sensitivity-adjusted signal that remote controller sends.The pin 16,17,18,19 (promptly distinguishing corresponding DATA0, DATA1, DATA2, DATA3) of touch key-press control chip connects the corresponding data transmit port of MCU.The pin 21,22 of touch key-press control chip (software setting sensitivity interface: SETUP, OUT_FLAG) connects the corresponding port of MCU.The pin 5,6,7,8,9,10,11,12 of touch key-press control chip is connected with the touch key-press sensitive surface.(sensitivity electric capacity is provided with the pin 24 of touch key-press control chip: CSEL) be connected with simulation MUX pin of chip 3.Simulation MUX pin of chip 16 connects+power supply of 5V.Simulation MUX pin of chip 13,14,15,12 is passed through the electric capacity of 4 different gears respectively: C1, C2, C3, C4 ground connection.In the present embodiment, the capacity of the electric capacity of C1～C4 is followed successively by: 0.01 μ F, 0.02 μ F, 0.03 μ F, 0.04 μ F; Simulation MUX pin of chip 11,10,9 is corresponding S respectively
0, S
1, S
2, connect with the corresponding port of MCU.MCU is by the different S of input
2S
1S
0Level value, choose the electric capacity of different gears, S
2S
1S
0The electric capacity gear such as the following table of level value correspondence:
| S 2S 1S 0 | 000 | 001 | 010 | 011 |
| The electric capacity gear | C1 | C2 | C3 | C4 |
The base stage of triode Q meets MCU, and emitter connects+power supply of 5V, the pin 15 of button control chip is touched in the collector electrode contact, and simultaneously, collector electrode is by resistance R 1 ground connection.MCU also is provided with the adjusting indicator light.
The control flow of embodiment 1 as shown in Figure 3, when artificial judgement sensitivity is low, send the increase sensitivity-adjusted signal by remote controller, after MCU receives and increases sensitivity-adjusted signal, MCU puts height with the base stage of triode, turn-off the power supply of touch key-press control chip, and light the adjusting indicator light, control simulation MUX is selected the electric capacity gear capacious than current electric capacity: with S
2S
1S
0Level become 001 by 000, send to the simulation MUX, the simulation MUX according to S
2S
1S
0Corresponding electric capacity gear is C2, connects capacitor C 2.Finish from capacitor C 1 to capacitor C 2 switch operating.The base stage of triode is put lowly again, connect the power supply of touch key-press control chip, and extinguish the adjusting indicator light, touch key-press recovers operate as normal.
In addition, when being minimum grade of capacitor C 1 as if current electric capacity gear, remote controller sends and reduces sensitivity-adjusted signal, and MCU does not send action command; If when current electric capacity gear had been maximum capacitor C 4, remote controller sent the increase sensitivity-adjusted signal, MCU does not send action command yet.
The current relative humidity scope of measuring according to humidity sensor is as sensitivity-adjusted signal.Circuit connects with circuit diagram shown in Figure 2 roughly the same, just " remote controller " among Fig. 2 being changed into " humidity sensor " is connected with MCU, MCU obtains current rh value by humidity sensor, the capacity of each electric capacity gear is then by recording by experiment under each damp condition, under the damp condition of present embodiment, the capacity of choosing the electric capacity of C1～C4 by experiment is followed successively by: 0.01 μ F, 0.02 μ F, 0.03 μ F, 0.04 μ F.The current relative humidity control simulation MUX control capacittance gear that MCU measures by humidity sensor, pairing electric capacity gear of relative humidity scope and S
2S
1S
0Level value such as following table:
| Rh value | ≤40％RH | 30％～60％RH | 50％～80％RH | ≥70％RH |
| The electric capacity gear | C1 | C2 | C3 | C4 |
| S 2S 1S 0 | 000 | 001 | 010 | 011 |
The control flow of embodiment 2 as shown in Figure 4.For example, what the electric capacity of current touch key-press connected is capacitor C 3, the current rh value that humidity sensor will record inputs to MCU, and after MCU obtained rh value, MCU put height with the base stage of triode, turn-off the power supply of touch key-press control chip, and lighting the adjusting indicator light, MCU simulates MUX switch-capacitor gear according to current rh value control: if current rh value is 50%～80%RH, then keep current electric capacity gear, MCU does not send action command, S
2S
1S
0Level value keep currency (010) constant; If current rh value is less than 50%, then MCU control simulation MUX switches to the little electric capacity gear of more current electric capacity gear, promptly switches to capacitor C 2 from capacitor C 3, and MCU is with S
2S
1S
0Level become 001 by 010, send to the simulation MUX, the simulation MUX according to S
2S
1S
0Corresponding electric capacity gear is C1, connects capacitor C 1.Humidity sensor continues to detect simultaneously, and MCU judges whether current rh value is 30%～60%RH, if then MCU does not send action command; If not, then MCU selects the hand-off process of the big electric capacity gear of the little electric capacity gear of more current electric capacity gear or more current electric capacity gear again according to current rh value; If current rh value is greater than 60%, then MCU control simulation MUX switches to the big electric capacity gear of more current electric capacity gear, promptly switches to capacitor C 4 from capacitor C 3, and MCU is with S
2S
1S
0Level become 011 by 010, send to the simulation MUX, the simulation MUX according to S
2S
1S
0Corresponding electric capacity gear is C4, connects capacitor C 4.Humidity sensor continues to detect simultaneously, and MCU judges whether current rh value is 30%～60%RH, if then MCU does not send action command; If not, then MCU selects the hand-off process of the big electric capacity gear of the little electric capacity gear of more current electric capacity gear or more current electric capacity gear again according to current rh value.After MCU control simulation MUX is finished the switch-capacitor gear engaged, the base stage of triode is put lowly again, connect the power supply of touch key-press control chip, and extinguish the adjusting indicator light, touch key-press recovers operate as normal.
Claims (8)
1. touch button device comprises MCU, the touch key-press control chip, and the touch key-press sensitive surface, MCU links to each other with the touch key-press sensitive surface by the touch key-press control chip; It is characterized in that, also comprise the sensitivity-adjusted signal unit, switch-operated response control, described sensitivity-adjusted signal unit links to each other with MCU, and described MCU links to each other with the touch key-press control chip by switch-operated response control.
2. touch button device as claimed in claim 1 is characterized in that, described sensitivity-adjusted signal unit is a remote controller.
3. touch button device as claimed in claim 1 is characterized in that, described sensitivity-adjusted signal unit is a humidity sensor.
4. touch button device as claimed in claim 1 is characterized in that, also comprises electronic switch, and MCU links to each other with the button control chip by described electronic switch.
5. touch button device as claimed in claim 4 is characterized in that, described electronic switch is a triode, and the base stage of described triode is connected with MCU, and collector electrode links to each other with the button control chip, and emitter connects power supply.
6. touch button device as claimed in claim 1 is characterized in that, also comprises the adjusting indicator light, and described adjusting indicator light links to each other with MCU.
7. as the described touch button device of above arbitrary claim, it is characterized in that described switch-operated response control is made of simulation MUX and electric capacity, the simulation MUX connects the electric capacity of different capabilities.
8. touch button device as claimed in claim 7 is characterized in that, described analog circuit selector connects the electric capacity of 4 gears, and the capacity of the electric capacity of 4 gears is respectively: 0.01 μ F, 0.02 μ F, 0.03 μ F, 0.04 μ F.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008203023594U CN201294510Y (en) | 2008-10-08 | 2008-10-08 | Touch key device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008203023594U CN201294510Y (en) | 2008-10-08 | 2008-10-08 | Touch key device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201294510Y true CN201294510Y (en) | 2009-08-19 |
Family
ID=41007991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008203023594U Expired - Fee Related CN201294510Y (en) | 2008-10-08 | 2008-10-08 | Touch key device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201294510Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103105979A (en) * | 2011-07-19 | 2013-05-15 | 佳能株式会社 | Electronic apparatus and control method therefor |
| CN103138730A (en) * | 2013-01-28 | 2013-06-05 | 四川畅洋泰鼎科技有限公司 | Wireless touch switch |
| CN106777685A (en) * | 2016-12-15 | 2017-05-31 | 深圳市博巨兴实业发展有限公司 | A kind of touch key-press chip based on MCU |
| CN109984616A (en) * | 2017-12-29 | 2019-07-09 | 浙江绍兴苏泊尔生活电器有限公司 | The processing method of touch key-press, cooking apparatus |
-
2008
- 2008-10-08 CN CNU2008203023594U patent/CN201294510Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103105979A (en) * | 2011-07-19 | 2013-05-15 | 佳能株式会社 | Electronic apparatus and control method therefor |
| CN103105979B (en) * | 2011-07-19 | 2016-03-02 | 佳能株式会社 | Electronic equipment and control method thereof |
| CN103138730A (en) * | 2013-01-28 | 2013-06-05 | 四川畅洋泰鼎科技有限公司 | Wireless touch switch |
| CN106777685A (en) * | 2016-12-15 | 2017-05-31 | 深圳市博巨兴实业发展有限公司 | A kind of touch key-press chip based on MCU |
| CN109984616A (en) * | 2017-12-29 | 2019-07-09 | 浙江绍兴苏泊尔生活电器有限公司 | The processing method of touch key-press, cooking apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090819 Termination date: 20111008 |