CN203942506U - A kind of touch key-press induction installation and intelligent switch - Google Patents
A kind of touch key-press induction installation and intelligent switch Download PDFInfo
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- CN203942506U CN203942506U CN201420343608.XU CN201420343608U CN203942506U CN 203942506 U CN203942506 U CN 203942506U CN 201420343608 U CN201420343608 U CN 201420343608U CN 203942506 U CN203942506 U CN 203942506U
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Abstract
The utility model relates to a kind of touch key-press induction installation and intelligent switch, this touch key-press induction installation comprises touch pad and the touch induction circuit module being connected with described touch pad, described touch pad is metal decking, described touch induction circuit module comprises: Circuit Matching and anti-static circuit, while contacting described metal decking for human body, form resonant circuit with human body isoboles, human space induced signal is strengthened, the simple alternating current signal of telecommunication of output certain frequency, make sensitivity adjustment and signal control circuit action triggers pwm signal, and when human body does not contact with metal decking, can not make described sensitivity adjustment and signal control circuit action triggers pwm signal.The impact that the utility model touch key-press induction installation has avoided static electricity on human body to cause circuit, has guaranteed that switchgear is not subject to static electricity on human body's impact.
Description
Technical field
The utility model belongs to intelligent switch technology field, is specifically related to a kind of touch key-press induction installation and intelligent switch.
Background technology
Touch technology, as a kind of technology of maturation, has multiple way of realization, as the touch-control reverse circuit that adopts triode to realize, and reverse circuit that the reverse circuit that employing CD4067 not gate is realized or employing NE555 realize etc.Above circuit, is all to adopt the faint bioelectricity of human body, by utilize human body over the ground distributed capacitance change and form touching signals, act on circuit, realization is controlled.Yet when equipment is discharged due to static electricity on human body, static electricity on human body causes whole circuit working undesired, thereby all easily cause equipment cisco unity malfunction; And all cannot solving static electricity on human body, above circuit causes undesired this phenomenon of whole circuit working; Particularly, when adopting metal contact panel, this point is particularly important.
Utility model content
The purpose of this utility model is to solve the problems of the technologies described above and the intelligent switch that a kind of touch key-press induction installation is provided and adopts this touch key-press induction installation.
For achieving the above object, the utility model is by the following technical solutions:
A touch key-press induction installation, comprises touch pad and the touch induction circuit module being connected with described touch pad, and described touch pad is metal decking, and described touch induction circuit module comprises:
Circuit Matching and anti-static circuit, while contacting described metal decking for human body, form resonant circuit with human body isoboles, and human space induced signal is strengthened, and the simple alternating current signal of telecommunication of output certain frequency is to sensitivity adjustment and signal control circuit; Comprise capacitor C 23, capacitor C 27 and capacitor C 57; One end of described metal decking and described capacitor C 23, capacitor C 27 joins, another termination signal ground SGND of described capacitor C 27, one end ground connection of described capacitor C 57, another termination signal ground SGND;
Described sensitivity adjustment and signal control circuit, for according to described sinusoidal ac signalizing activity, overturn, and triggers PMW signal; Comprise capacitance touch induction IC, resistance R 31, capacitor C 31, capacitor C 34, RP31, RP32; The other end of capacitor C 23 described in one termination of described resistance R 31, the TP1 end of another termination capacitance touch induction IC of described resistance R 31, TP1 end, another termination signal ground SGND of capacitance touch induction IC described in a termination of described capacitor C 31; AHLB, the VDD of capacitance touch induction IC, LPMB, MOT1, MOT0 end described in one termination of described capacitor C 34, another termination signal ground SGND of described capacitor C 34, the OUT end of capacitance touch induction IC described in the input termination of described RP31, the input of RP32 described in the output termination of described RP31, the output termination signal ground SGND of described RP32.
The utility model object is also to provide a kind of Intelligent touch switch, comprise AC DC insulating power supply, single-chip microcomputer and the touch key-press induction module being connected with described single-chip microcomputer, wireless module, LED light driver module, isolated form load output circuit, described touch key-press induction module adopts described touch key-press induction installation.
The utility model is by when human body contacts described metal decking, human body isoboles by Circuit Matching and antistatic and metal decking front end forms resonant circuit, human space induced signal is strengthened, and the simple alternating current signal of telecommunication of output certain frequency is to sensitivity adjustment and signal control circuit; By sensitivity adjustment and signal control circuit, according to described sinusoidal ac signalizing activity, overturn, trigger PMW signal and realize touch-control, the impact of having avoided static electricity on human body to cause circuit, has guaranteed that switchgear is not subject to static electricity on human body's impact.
Accompanying drawing explanation
Figure 1 shows that the circuit diagram of a kind of touch key-press induction installation that the utility model embodiment provides;
The circuit theory diagrams of the closed circuit forming during the metal decking of finger touches shown in Fig. 2;
Figure 3 shows that a kind of square frame principle structure chart of intelligent switch.
Embodiment
Below, in conjunction with example, substantive distinguishing features of the present utility model and advantage are further described, but the utility model is not limited to listed embodiment.
Refer to Fig. 1～2, a kind of touch key-press induction installation, comprises touch pad and the touch induction circuit module being connected with described touch pad, and described touch pad is metal decking, and described touch induction circuit module comprises:
Circuit Matching and anti-static circuit, while contacting described metal decking for human body, form resonant circuit with the human body isoboles (comprising 5K resistance R 1 and 500P capacitor C 1) of metal decking front end, human space induced signal is strengthened, and the simple alternating current signal of telecommunication of output certain frequency is to sensitivity adjustment and the signal control circuit of rear end; This Circuit Matching and anti-static circuit comprise the balancing capacitance C57 between capacitance C23, capacitor C 27 and signal ground and the earth; One end of described metal decking and described capacitor C 23, capacitor C 27 joins, another termination signal ground SGND of described capacitor C 27, one end ground connection of described capacitor C 57, another termination signal ground SGND;
Described sensitivity adjustment and signal control circuit, for according to described sinusoidal ac signalizing activity, overturn, and triggers PMW signal; Described sensitivity adjustment and signal control circuit comprise capacitance touch induction IC, resistance R 31, capacitor C 31, capacitor C 34, potentiometer RP31, potentiometer RP32; The other end of capacitor C 23 described in one termination of described resistance R 31, the TP1 end of another termination capacitance touch induction IC (U31) of described resistance R 31, TP1 end, another termination signal ground SGND of capacitance touch induction IC described in a termination of described capacitor C 31; AHLB, the VDD of capacitance touch induction IC, LPMB, MOT1, MOT0 end described in one termination of described capacitor C 34, another termination signal ground SGND of described capacitor C 34, the OUT end of capacitance touch induction IC described in the input termination of described potentiometer RP31, the input of potentiometer RP32 described in the output termination of described potentiometer RP31, the output termination signal ground SGND of described potentiometer RP32, the output PAD-IN1,2,3 of described potentiometer RP31 receives single-chip microcomputer corresponding end.
Wherein, the frequency of the described simple alternating current signal of telecommunication is 50Hz.
Further, the touch face of described metal decking is connected by spring with described touch induction circuit intermodule.
In order further to strengthen electrostatic isolation effect, between described metal decking and described touch induction circuit module, be provided with ABS separator, by being provided with ABS separator, stopped the impact of static electricity on human body on equipment, be also the protection to user simultaneously.
What described induced key circuit can adopt is the AR401 chip of Shenzhen A Da electronics, AR401 is a capacitance touch induction IC designing for small size, low-power consumption, wide voltage, high performance-price ratio specially, can directly replace traditional mechanical touch key.
When there is no human body when contact, metallic bond adds that Circuit Matching antistatic does not form oscillating circuit, therefore, and sensitivity adjustment and the signal control circuit generation touching signals that can not overturn; When human body contacts with metallic bond, the human body isoboles of 473 electric capacity and front end forms 50Hz resonant circuit, human space induced signal is strengthened, reaction has stronger (for signal control circuit) 50Hz simple alternating current signal of telecommunication on 82P electric capacity, impels sensitivity adjustment and signal control circuit action.Meanwhile, due to 82P electric capacity every straight effect, can effectively prevent that static electricity on human body is to the interference of equipment and damage.
Below the operation principle of described touch key-press induction installation is described as follows:
1, there is no human body touching signals
Because the TP1 pin of AR401-20 chip has two functions: (1) produces the VPP=1V signal of 25Hz, in the circuit forming at electric capacity 473,82P, 20K Ω etc., be weak resonance.(2) average to the pulse of 25Hz in TP1 pin inside, (peak value of this waveform is about 1V to waveform according to the linking springs of reality test and digitally, frequency is 25Hz), can estimate mean value U0=1V * 1/10+0V * 9/10 (in figure, duty ratio is 1/10), be about 0.1V; Lower than chip internal comparison circuit threshold voltage, do not cause the OUT1 pin upset output of AR401-20 chip.
2, when finger contacting metal panel
From Fig. 1 circuit, can find out, when finger touching metal decking, by C27, C57 etc., understand the closed circuit shown in composition diagram 2: wherein, C57 is the balancing capacitance between signal ground and the earth; The weak resonance of this closed-loop path meeting, in the AC signal of 50Hz distortion, due to original signal intensity VPP=20V, therefore forms the peak-to-peak value that is not less than 4V on C27 electric capacity; Get back to Fig. 1 circuit, this signal metal panel is superimposed upon on the signal of the 25Hz VPP=1V being produced by TP1 pin, because two signals are two times of relations, thereby not only can not suppress 25Hz VPP=1V signal, can strengthen on the contrary; Even if do not consider covibration, calculate separately the average voltage on TP1 pin now, can be Ux=0.1V+4V * 1/5+0V * 4/5=0.9V, this voltage U x is owing to being greater than inner comparison circuit threshold voltage and causing the OUT1 pin upset output of AR401-20 chip.
It should be noted that, described 50Hz signal, conservative its duty ratio of getting is 1/5. in fact large than this value; Or also can according to approximate alternating current calculating mean value; Here, consider convenience of calculation, according to duty ratio 1/5, calculate.Comprehensive 1,2 two states, combine by circuit and metal decking, and the equipment of can realizing is completely controlled.
Based on above analysis, this circuit can possess following advantage:
If A touches metal decking with nonmagnetic substance, can not cause circuit operation;
B, can not cause because of variation of ambient temperature, humidity variation, noise etc. circuit operation;
C, circuit have certain examination (referring to organism).
The utility model object is also to provide a kind of Intelligent touch switch, shown in Figure 3, comprise AC DC insulating power supply, single-chip microcomputer and the touch key-press induction module being connected with described single-chip microcomputer, wireless module, LED light driver module, isolated form load output circuit, described touch key-press induction module adopts described touch key-press induction installation.
Wherein, described wireless module comprise RF433 wireless data transmission module and or RS485 communication module.
When human body contacting metal button touch pad, special-purpose touch induction circuit can obtain the induced signal of corresponding button, this signal is delivered to single-chip microcomputer and process; Single-chip microcomputer is switching manipulation or light modulation operation according to the length judgement of the time of touch, and this control is required to become the pwm signal that needs triggering, deliver in corresponding isolated form load output circuit, realize control operation, meanwhile, can be according to configuration requirement, this operation is sent to operating result from RS485 communication module or RF433 wireless data transmission module, give the management equipment of this switch, as intelligent gateway, by intelligent gateway, deliver to PAD or PC, mobile phone).Certainly, if operation requirements is to send from management equipment, can pass on switch by RS485 communication module or RF433 wireless data transmission module, switch utilizes pwm signal to deliver to load operation according to data demand, to realize far-end, controls.
It is ATmega88 that described single-chip microcomputer can adopt host CPU, and ATmega88 is 8 the CMOS microcontrollers of low-power consumption based on AVR enhancement mode risc architecture.Due to its advanced instruction set and single clock cycle time for each instruction, the data throughput of ATmega48/88/168 is up to 1MIPS/MHz, thereby can extenuate the contradiction of system between power consumption and processing speed.
The CC1100 of the wireless telecommunications chip ShiTI company that described RF433 wireless data transmission module adopts, CC1100 is the UHF transceiver of the real monolithic of a kind of low cost, for low-consumption wireless application designs.Main circuit will be set as 315,433,868 and the ISM of 915MHz (industry, science and medical science) and SRD (short-range device) frequency band.Meanwhile, CC1100 provides hardware supports widely for processing data packets, data buffering, burst transfers of data, clear channel estimating, quality of connection indication and electromagnetic wave excites.
Described RS485 communication module is as adopted SP3485 chip.SP3485 is+3.3V low-power consumption duplex transceiver, meets the requirement of RS-485 and RS-422 serial protocol completely, simultaneously compatible industry standard specifications.SP3485 meets the electrical code of RS-485 and RS-422 serial protocol, and message transmission rate can be up to 10Mbps (bringing onto load).The RO of SP3485 chip, DI are connected with RXD, the TXD pin of MCU respectively, and A, B two pins are connected with twisted-pair feeder by filter circuit, and MCU can be connected to network by UART like this.
For distinguishing off status, described intelligent switch is also provided with button light indicating module, for the lamplight pointing of the state of opening the light, as adopted R, G, B three-basic-colour lamp pearl, can pass through software adjustment light color
Described AC DC insulating power supply can adopt MC33063 chip.This device itself has comprised the monolithic control circuit of the needed major function of DC/DC converter, by the controlled oscillator of pedestal generator, comparator, duty ratio with temperature self-compensation function, the compositions such as R-S trigger and High-current output switching circuit.
The utility model is by when human body contacts described metal decking, human body isoboles by Circuit Matching and antistatic and metal decking front end forms resonant circuit, human space induced signal is strengthened, and the simple alternating current signal of telecommunication of output certain frequency is to sensitivity adjustment and signal control circuit; By sensitivity adjustment and signal control circuit, according to described sinusoidal ac signalizing activity, overturn, trigger PMW signal and realize touch-control, the impact of having avoided static electricity on human body to cause circuit, has guaranteed that switchgear is not subject to static electricity on human body's impact.
The utility model hardware designs meets industrial design standard, adopts full suspension isolation design mode, has improved greatly the stability of system, is embodied in:
1, human body touch operation, by ABS separator, has been stopped the impact of static electricity on human body on equipment, is also the protection to user simultaneously.
2, output pwm signal is delivered to isolated form load output circuit, this process adopts optoelectronic controlled silicon as isolating device, with optoelectronic controlled silicon, go again to control the power device (controllable silicon or relay etc.) driving, accomplished outside forceful electric power circuit and the isolation of system light current circuit, improved stability.
3, adopt AC/DC insulating power supply, both accomplished, to weak electricity system power supply, to have played again the protective effect to system.
4, components and parts all adopt the above components and parts of technical grade, are applied to commercialization, and itself is with regard to a high grade (commercial 0-70 ℃, industrial-40-85 ℃), so design margin is well-to-do.
The above is only preferred implementation of the present utility model; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (4)
1. a touch key-press induction installation, comprises touch pad and the touch induction circuit module being connected with described touch pad, it is characterized in that, described touch pad is metal decking, and described touch induction circuit module comprises:
Circuit Matching and anti-static circuit, while contacting described metal decking for human body, form resonant circuit with human body isoboles, and human space induced signal is strengthened, and the simple alternating current signal of telecommunication of output certain frequency is to sensitivity adjustment and signal control circuit; Comprise capacitor C 23, capacitor C 27 and capacitor C 57; One end of described metal decking and described capacitor C 23, capacitor C 27 joins, another termination signal ground SGND of described capacitor C 27, one end ground connection of described capacitor C 57, another termination signal ground SGND;
Described sensitivity adjustment and signal control circuit, for according to described sinusoidal ac signalizing activity, overturn, and triggers PMW signal; Comprise capacitance touch induction IC, resistance R 31, capacitor C 31, capacitor C 34, RP31, RP32; The other end of capacitor C 23 described in one termination of described resistance R 31, the TP1 end of another termination capacitance touch induction IC of described resistance R 31, TP1 end, another termination signal ground SGND of capacitance touch induction IC described in a termination of described capacitor C 31; AHLB, the VDD of capacitance touch induction IC, LPMB, MOT1, MOT0 end described in one termination of described capacitor C 34, another termination signal ground SGND of described capacitor C 34, the OUT end of capacitance touch induction IC described in the input termination of described RP31, the input of RP32 described in the output termination of described RP31, the output termination signal ground SGND of described RP32.
2. touch key-press induction installation according to claim 1, is characterized in that, the frequency of the described simple alternating current signal of telecommunication is 50Hz.
3. an Intelligent touch switch, comprise AC DC insulating power supply, single-chip microcomputer and the touch key-press induction module being connected with described single-chip microcomputer, wireless module, LED light driver module, isolated form load output circuit, it is characterized in that, described touch key-press induction module adopts touch key-press induction installation described in claim 1 or 2.
4. Intelligent touch switch according to claim 3, is characterized in that, described wireless module comprise wireless data transmission module and or RS485 communication module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201420343608.XU CN203942506U (en) | 2014-06-25 | 2014-06-25 | A kind of touch key-press induction installation and intelligent switch |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420343608.XU CN203942506U (en) | 2014-06-25 | 2014-06-25 | A kind of touch key-press induction installation and intelligent switch |
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| CN203942506U true CN203942506U (en) | 2014-11-12 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107196635A (en) * | 2017-06-12 | 2017-09-22 | 苏州贝艾尔净化科技有限公司 | The touch key-press circuit of new trend controller |
| CN109039319A (en) * | 2018-08-13 | 2018-12-18 | 中科芯集成电路股份有限公司 | A kind of anti-interference capacitor formula touch key-press controller and implementation method |
| CN111106820A (en) * | 2018-10-26 | 2020-05-05 | 珠海格力电器股份有限公司 | Touch key control system and control method thereof |
| TWI780222B (en) * | 2018-09-07 | 2022-10-11 | 日商東普雷股份有限公司 | Electrostatic capacitive keyboard device |
-
2014
- 2014-06-25 CN CN201420343608.XU patent/CN203942506U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107196635A (en) * | 2017-06-12 | 2017-09-22 | 苏州贝艾尔净化科技有限公司 | The touch key-press circuit of new trend controller |
| CN109039319A (en) * | 2018-08-13 | 2018-12-18 | 中科芯集成电路股份有限公司 | A kind of anti-interference capacitor formula touch key-press controller and implementation method |
| CN109039319B (en) * | 2018-08-13 | 2022-05-31 | 中科芯集成电路有限公司 | Anti-interference capacitive touch key controller and implementation method |
| TWI780222B (en) * | 2018-09-07 | 2022-10-11 | 日商東普雷股份有限公司 | Electrostatic capacitive keyboard device |
| CN111106820A (en) * | 2018-10-26 | 2020-05-05 | 珠海格力电器股份有限公司 | Touch key control system and control method thereof |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141112 Termination date: 20160625 |
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| CF01 | Termination of patent right due to non-payment of annual fee |