CN209731206U - A kind of multiplexing control circuit of key in conjunction with communication function - Google Patents
A kind of multiplexing control circuit of key in conjunction with communication function Download PDFInfo
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- CN209731206U CN209731206U CN201920412011.9U CN201920412011U CN209731206U CN 209731206 U CN209731206 U CN 209731206U CN 201920412011 U CN201920412011 U CN 201920412011U CN 209731206 U CN209731206 U CN 209731206U
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Abstract
The utility model discloses a kind of multiplexing control circuit of key in conjunction with communication function, including receiving unit, the microprocessor for handling the received data of receiving unit and the transmitting unit for emitting data for receiving data, the receiving unit connects microprocessor with transmitting unit；The first operating mode and the second operating mode are preset in the microprocessor, the transmitting unit emits detection light, detection light is received after being reflected by receiving unit, detection light after reflection is sent to microprocessor by receiving unit, microprocessor is according to the duration of the detection light received, judge that multiplexing control circuit should be at the first operating mode or the second operating mode, and controls multiplexing control circuit and be in the first operating mode or the second operating mode.The utility model can not only substitute mechanical key or while magnetic induction key plays keypress function, but also can satisfy the demand with extraneous communication, solve the problems such as traditional circuit occupied space is big, protective is poor.
Description
Technical field
The utility model relates to measuring instrument control circuit technical field, specially a kind of key is in conjunction with communication function
Multiplexing control circuit.
Background technique
It is also more and more prosperous to the demand of intellectual product in the market with the rapid development of scientific and technological progress and technology of Internet of things
It contains, while the product covered is also more and more.As the measurement product that standard metering uses, including intelligent gas meter, intelligent water
Table etc. is also towards intelligence, networking, the continuous development of Highgrade integration direction.Especially for intelligent gas meter, intelligent water
Table constantly towards electronics sampling metering method development, has new requirement to the volume size of meter.It is counted as electronic type samples
The intelligent gas meter of amount, intellectual water meter small product size are smaller and smaller, along with the radio communication mold group for including on intelligent meter, also
Consider the air interference of high-frequency signal etc., therefore the design space for leaving other functional circuits for is also fewer and fewer.
Currently, met using touch key circuit and two kinds of circuits of near infrared communication circuit intelligent meter by key control
Function and communication function.Both functional circuits occupy the I/O mouth of multiple MCU microprocessors, while touch key mostly uses machine
Tool touches.Mechanical key needs to reserve the independent position of key in product cover structure, is also required to reserve on printed circuit board
The placement space of touch key, and the occupancy volume of usually mechanical touch key on circuit boards is larger.And mechanical key protects
Property it is poor, security performance is low, and the mechanical clearance of mechanical key is especially for having the dust-proof of high requirement of shelter, waterproof experiment to have very
Big influence is generally difficult to meet IP68 grades of requirement of shelter.
If replacing mechanical key using magnetic induction key, magnetic induction key is also highly susceptible to extraneous factor interference, by force
Magnetic attack easily leads to malfunction.Simultaneously in normal need operation button, it is also necessary to the tools such as outer carry magnet trigger its work, with
The similar mechanical key convenience of operating function is too far compared to difference, while in view of the factors magnetic induction keys such as cost use more
Tongue tube, and tongue tube mostly uses glass tube to encapsulate, therefore its intensity is lower, is readily damaged, and is unfavorable for transporting for long-distance.
Utility model content
The purpose of this utility model is to provide for a kind of multiplexing control circuit of key in conjunction with communication function, both can be with
It while substitution mechanical key or magnetic induction key play keypress function, and can satisfy the demand with extraneous communication, solve
The problems such as traditional circuit occupied space is big, protective is poor.
In order to achieve the above-mentioned object of the invention, the utility model uses following technical scheme: a kind of key and communication function
In conjunction with multiplexing control circuit, including for receiving data receiving unit, for handling the micro- of the received data of receiving unit
Processor and transmitting unit for emitting data, the receiving unit connect microprocessor with transmitting unit；The micro process
Be preset with the first operating mode and the second operating mode in device, the transmitting unit emits detection light, detection light reflected after by
Receiving unit receives, and the detection light after reflection is sent to microprocessor by receiving unit, and microprocessor is according to the detection received
The duration of light judges that multiplexing control circuit should be at the first operating mode or the second operating mode, and controls multiplexing control circuit
In the first operating mode or the second operating mode.
Multiplexing control circuit is arranged in the shell of gas meter, flow meter, and gas meter housing is equipped with a transparent window, conveniently connects
It receives unit and transmitting unit and hull outside carries out the reception and transmitting of data.Receiving unit and transmitting unit are in state of activation
Under, staff blocks transparent window, and transmitting unit emits detection light, and detection light reflects on the transparent window blocked
It is received unit reception, receiving unit will be sent to microprocessor after the detection light received.Microprocessor is according to receiving
The duration of the detection light of transmitting unit transmitting, to judge that multiplexing control circuit is under corresponding operating mode at this time.Generally,
Operating mode includes communication pattern, touch key mode and low-power consumption mode.
Compared with prior art, the multiplexing control circuit using the key of above-mentioned technical proposal in conjunction with communication function,
It has the following beneficial effects:
One, the multiplexing control circuit using the key of the utility model in conjunction with communication function, by keypress function circuit and
Communication function is incorporated in same circuit, saves the space of circuit on-board circuitry arrangement, improves the utilization rate of printing plate suqare.
Two, traditional mechanical key or magnetic induction key are replaced using transmitting unit and receiving unit, reduces the life of product
Produce cost.
Three, transmitting unit and receiving unit are triggered using spectrum, tradition machinery key are substituted, without in the cover of product
Key slot is opened up, does not have mechanical clearance in cover, improves the grade of the waterproof and dustproof of product, further increases making for product
Use the service life.
Four, it is triggered using spectrum, comparing has stronger diamagnetic performance with magnetic induction key, and easy to damage there is no transporting
The problem of.
It preferably, further include power control unit and power supply unit, the power control unit connects microprocessor and confession
Electric unit, power control unit are controlled by microprocessor, and power control unit is separately connected transmitting unit and receiving unit, micro-
To transmitting unit and receiving unit power supply or power-off under the control of processor.Using power control unit to transmitting unit and reception
The power supply independent control of unit, and be that transmitting unit and receiving unit are powered by power supply unit, power supply unit can be improved compared with
High operating current, the operating current needed for meeting multiplexing control circuit under different working modes.
Preferably, the power control unit includes the first triode, and the base stage of first triode connects micro process
The power control pin of device, the emitter of the first triode connect high level, and the collector of the first triode connects receiving unit
And transmitting unit.
Preferably, the power control unit further includes first resistor and first capacitor, the base stage of first triode
The power control pin of microprocessor is connected by first resistor, the collector of the first triode is grounded by first capacitor.
Wherein, first resistor is the current-limiting resistance of the first transistor base, prevents the first triode from overcurrent damage occurs, mentions
The stability of high integrated circuit；First capacitor is used for the filtering of input current, further obtains the input electricity of more smooth steady
Pressure.
Preferably, the transmitting unit includes emitting diode, the second triode, and the emitter of second triode connects
The collector of the first triode is connect, the second transistor base connects the data output pins of microprocessor, the collection of the second triode
Electrode connects the anode of emitting diode, the cathode ground connection of the emitting diode.
Preferably, the transmitting unit further includes second resistance, 3rd resistor and the 4th resistance, second triode
Emitter connects the second transistor base by second resistance, and second transistor base is defeated by 3rd resistor connection data
Pin out, the second transistor collector connect the anode of emitting diode by the 4th resistance.
Wherein, second resistance is the pull-up resistor of the second transistor base, guarantees that data output pins are believed in no data
Number when, keep high level signal；3rd resistor is the current-limiting resistance of the second transistor base, and the 4th resistance is emitting diode
Current-limiting resistance, 3rd resistor and the 4th resistance prevent the second triode or emitting diode from overcurrent damage occurs respectively, improve whole
The stability of body circuit.
Preferably, the receiving unit includes reception pipe and third transistor, the anode connection the two or three of the reception pipe
The collector of pole pipe, the base stage of the cathode connection third transistor of reception pipe, third transistor collector and reception pipe anode connect
The letter data that microprocessor is connected after connecing receives pin, is grounded after the emitter of the emitter connection reception pipe of third transistor.
Preferably, the receiving unit further includes the 5th resistance, the 6th resistance and the 7th resistance, the third transistor base
Pole connects reception pipe cathode by the 5th resistance；The third transistor collector connects reception pipe anode by the 6th resistance,
The data receiver pin is connected between the 6th resistance and third transistor collector；The third transistor emitter passes through
7th resistance connects the cathode of reception pipe, the connecting node ground connection of the 7th resistance and third transistor.
Wherein, the 5th resistance is the current-limiting resistance of third transistor base stage, prevents third transistor from overcurrent damage occurs, mentions
The stability of high integrated circuit；6th resistance is the pull-up resistor of third transistor base stage, guarantees that data receiver pin is not having
When data-signal, high level signal is kept；7th resistance is the clamped resistance of base voltage.
Preferably, the transmitting unit includes emitting diode and the 8th resistance, and the anode of the emitting diode passes through
8th resistance connects the power control pin of microprocessor, the cathode ground connection of emitting diode；The receiving unit includes receiving
Pipe, the 9th resistance and the second capacitor, the reception pipe anode are connected the first pulse pin of microprocessor by the 9th resistance, connect
Closed tube cathode ground connection, second capacitor is in parallel with reception pipe, and the reception pipe anode is connect with the node of the second capacitance connection
Second pulse pin of microprocessor.
Preferably, the transmitting unit includes emitting diode, and the emitting diode uses infrared light-emitting diode；Institute
Stating receiving unit includes reception pipe, and the reception pipe uses infrared receiving diode or infrared receiver triode.
Detailed description of the invention
Fig. 1 is the unit connection figure of multiplexing control circuit embodiment of the utility model key in conjunction with communication function；
Fig. 2 is circuit connection diagram in the present embodiment 1；
Fig. 3 is the unit connection figure of multiplexing control circuit embodiment 2 of the utility model key in conjunction with communication function；
Fig. 4 is circuit connection diagram in the present embodiment 2.
Specific embodiment
Below with reference to the accompanying drawings embodiments of the present invention are described more fully.
Embodiment 1:
It is as shown in Figure 1 the unit connection figure of multiplexing control circuit of the key in conjunction with communication function in the present embodiment, this
Multiplexing control circuit include receiving unit for receiving data, the microprocessor for handling the received data of receiving unit and
For emitting the transmitting unit of data, receiving unit connects microprocessor with transmitting unit；The first work is preset in microprocessor
Operation mode and the second operating mode, transmitting unit emit detection light, and detection light is received after being reflected by receiving unit, receiving unit
Detection light after reflection is sent to microprocessor, microprocessor judges to be multiplexed control according to the duration of the detection light received
Circuit should be at the first operating mode or the second operating mode, and controls multiplexing control circuit and be in the first operating mode or second
In operating mode.It wherein, further include power control unit and power supply unit, power control unit connects microprocessor and power supply is single
Member, power control unit are controlled by microprocessor, and power control unit is separately connected transmitting unit and receiving unit, in micro process
To transmitting unit and receiving unit power supply or power-off under the control of device.
Multiplexing control circuit is arranged in the shell of gas meter, flow meter, and gas meter housing is equipped with a transparent window, conveniently connects
It receives unit and transmitting unit and the external communication device of hull outside carries out the reception and transmitting of data.Receiving unit and transmitting are single
In active state, staff blocks transparent window to member, and transmitting unit emits detection light, and detection light is saturating what is blocked
Reflection is received unit reception on photopic vision window, and the detection light received is sent to microprocessor by receiving unit.Microprocessor root
According to the duration of the detection light of the transmitting unit transmitting received, to judge that multiplexing control circuit is in corresponding operating mode at this time
Under.In the present embodiment, the detection light of transmitting unit transmitting selects infrared light.
Photosensitive key and communication function hardware components are combined into one by the present embodiment, with original machine tool touch key circuit and close
Infrared communication circuit compares the I/O mouth resource for occupying less micro process, while having saved mechanical touch key in product cover
The placement space on position and printed circuit board in structure, so that the higher utilization rate of printed circuit board is effectively increased, it can
Realize the design of more multifunctional circuit.While saving component reduces product cost, improves life of product and reliability, this
Multiplexing control circuit is all located at enclosure interior, does not have mechanical clearance in cover, effectively increases the IP degree of protection of product, meets
The requirement of shelter of high IP.
It is illustrated in figure 2 the circuit connection diagram of multiplexing control circuit in the present embodiment, power control unit control transmitting is single
The power supply of member and receiving unit, power control unit include triode Q1, the power supply of the base stage connection microprocessor of triode Q1
Pin is controlled, the emitter of triode Q1 connects high level, the collector connection receiving unit and transmitting unit of triode Q1.Electricity
Source control unit further includes resistance R1 and capacitor C1, and the base stage of triode Q1 is controlled by the power supply of resistance R1 connection microprocessor
The collector of pin, triode Q1 is grounded by capacitor C1.Wherein, resistance R1 is the current-limiting resistance of triode Q1 base stage, is prevented
Overcurrent damage occurs for triode Q1, improves the stability of integrated circuit；Capacitor C1 is used for the filtering of input current, further obtains
The more input voltage of smooth steady.
Receiving unit includes resistance R5, resistance R6, resistance R7, reception pipe D1 and triode Q3, and the anode of reception pipe D1 is even
The collector of triode Q2 is connect, triode Q3 base stage is passed through by resistance R5 connection reception pipe D1 cathode, triode Q3 collector
Resistance R6 connection reception pipe D1 anode, triode Q3 collector are connect by the letter data of network label IR-RXD connection microprocessor
Spasm foot, triode Q3 emitter pass through the cathode of resistance R7 connection reception pipe D1, the connecting node of resistance R7 and triode Q3
Ground connection.Wherein, resistance R5 is the current-limiting resistance of triode Q3 base stage, prevents triode Q3 from overcurrent damage occurs, and improves whole electricity
The stability on road；Resistance R6 is the pull-up resistor of triode Q3 base stage, guarantees that data receiver pin when not having data-signal, is protected
Hold high level signal；Resistance R7 is the clamped resistance of base voltage.
Transmitting unit includes diode D2, triode Q2, resistance R2, resistance R3 and resistance R4, the emitter of triode Q2
The emitter of the collector of connecting triode Q1, triode Q2 passes through resistance R2 connecting triode Q2 base stage, triode Q2 base stage
By resistance R3, i.e. network label IR-TXD, data output pins are connected, triode Q2 collector passes through two pole of resistance R4 connection
The anode of pipe D2, the cathode ground connection of diode D2.Wherein, resistance R2 is the pull-up resistor of triode Q2 base stage, guarantees that data are defeated
Pin keeps high level signal when not having data-signal out；Resistance R3 is the current-limiting resistance of triode Q2 base stage, resistance R4
For the current-limiting resistance of diode D2, resistance R3 and resistance R4 prevent triode Q2 or diode D2 from overcurrent damage occurs respectively, mention
The stability of high integrated circuit.
In the connection circuit of power control unit, network label POWER-CTRL connection power control pin, microprocessor
Power control pin export low level, low level through current-limiting resistance R1 access triode Q1 base stage.Due to the hair of triode
Emitter-base bandgap grading is connected to power supply unit and obtains voltage VCC, thus triode Q1 be connected, thus make voltage VCC be linked into lower section transmitting
It is seen in circuit and reception circuit, is transmit circuit and reception circuit power supply.
Wherein, the URAT serial ports of IR-TXD, IR-RXD and microprocessor connects.
In the present embodiment, multiplexing control circuit has multiple-working mode: where the first operating mode is communication mould
Formula, the second operating mode be touch key mode, and multiplexing control circuit is also preset in microprocessor not in operating mode
Low-power consumption mode.Multiplexing control circuit is adjusted to corresponding by the duration that microprocessor is blocked by the transparent window in cover
Mode under.The relevant work principle of each mode is illustrated below, in following operating mode, transmitting unit and is connect
Receive the state of activation that unit is in energization.
Communication pattern: the specific duration that microprocessor is blocked by transparent window, decision circuit work in communication mode
When, it can be communicated with external communication device.At this point, external communication device sends spectrum director data to receiving unit, connect
After receiving unit reception spectrum director data, spectrum director data is sent to microprocessor, microprocessor is to the spectrum received
Director data obtains feedback data after being handled, and feedback data is sent to external communication device by transmitting unit, complete
At the date interworkmg of gas meter, flow meter and external communication device.
The communication mode of gas meter, flow meter is generally divided into two kinds, and one kind is near-infrared communication mode, and another kind is telecommunication mould
Formula.In two kinds of communication modes, the working principle of receiving unit, microprocessor and transmitting unit is essentially identical.
Below with reference to circuit connection specific in Fig. 2, the working principle of entire circuit is analyzed:
In a communication mode, external communication device sends spectrum director data to reception pipe D1, and reception pipe D1 receives spectrum
It being connected after director data, the base stage of the node and Q3 triode of resistance R5 and resistance R7 is high level, while triode Q3
Collector is since the access of power control unit is also with the presence of voltage VCC, the transmitting of Q3 triode extremely low level, thus three poles
Pipe Q3 conducting IR-RXD network level is that low level is input to microprocessor.When reception pipe D1 is not received by spectrum director data
When, when triode Q3 is not turned on, IR-RXD network is pulled to high level by resistance R3.
After the complete received spectrum director data of microprocessor processes, feedback data is exported through IR-TXD network, in data
Low level triode Q2 is connected, so that the feedback data of micro process is emitted optical signals by diode D2.
Touch key mode: under this operating mode, power control unit is similarly transmitting unit and receiving unit power supply.
When the spectroscopic data of transmitting unit transmitting is emitted on cover transparent window, transparent window, which is blocked, causes spectroscopic data to emit
And receive receiving unit, receiving unit receive reflection after spectroscopic data after by spectroscopic data be sent to microprocessor carry out
Processing.Under touch key mode, the circuit theory and circuit of receiving unit and transmitting unit work logical multiplexing control circuit
It is identical when under news mode.But microprocessor judges the specific key function of photosensitive key according to the duration of the detection light received
Energy.
Low-power consumption mode:
After cover transparent window is blocked for a long time, receiving unit does not receive photosignal, settable power supply control
Circuit is low-power consumption mode, makes transmit circuit and receive power input intermittent time of circuit to lengthen, and reduces this multiplexing with this
The overall power of control circuit makes circuit be in low power consumpting state.It specifically, can be by the arteries and veins of POWER-CTRL and microprocessor
Width modulation (PWM) pin connection, controls the power consumption for reducing circuit to realize.Power supply control is drawn after power control unit activation
Foot is set as PWM function, and the pulse width time of this pin is arranged, and makes the corresponding duration of the open and close of power control unit interval.Low function
Consumption mode can effectively reduce the power consumption of circuit, to improve the service life of the power supplys such as lithium battery or alkaline battery；
In the present embodiment, transmitting unit includes diode D2, and diode D2 uses infrared light-emitting diode；Receiving unit
Infrared receiving diode or infrared receiver triode are used including reception pipe D1, reception pipe D1.In Fig. 2 and Fig. 4, reception pipe D1
It is connected using infrared receiver triode into circuit, infrared receiving diode is not drawn into.
Embodiment 2:
Unlike embodiment 1, not including in the present embodiment has power control unit, and transmitting unit and reception are single
The circuit connection that member uses is also different.Be illustrated in figure 3 the unit connection figure of the present embodiment multiplexing control circuit, transmitting unit with
Receiving unit connects microprocessor, and passes through microprocessor power supply.
Fig. 4 is the physical circuit connection figure of the present embodiment, and transmitting unit includes diode D2 and resistance R8, diode D2
Anode by the power control pin of resistance R8 connection microprocessor, the cathode of diode D2 is grounded；Receiving circuit includes connecing
Closed tube D1, resistance R9 and capacitor C2, reception pipe D1 anode pass through the first pulse pin of resistance R9 connection microprocessor, reception pipe
D1 cathode ground connection, capacitor C2 is in parallel with reception pipe D1, the node connection microprocessor that reception pipe D1 anode is connect with capacitor C2
Second pulse pin.Wherein, network label POWER-CTRL, network label MCU-PULSE- PA, network label MCU-PULSE-
PB is connect with the I/O of microprocessor.The network label POWER- CTRL of transmit circuit is directly exported by I/O mouthfuls of microprocessor
High level makes diode D2 emit light pulse signal, and blocks the principle of reflection with light by outside, receives reception pipe D1
The pulse signal of diode D2 transmitting.When wherein POWER-CTRL exports high level, MCU-PULSE-PA also exports high electricity simultaneously
It is flat.After the pulse signal for receiving diode D2 transmitting, reception pipe D1 conducting, it is defeated that MCU-PULSE-PB exports low level signal
Enter to microprocessor and carry out data processing, judges the key function of the operating mode of multiplexing control circuit and photosensitive key at this time
Energy.Component used in the present embodiment is smaller, and the space used on circuit board is less, can relatively reduce circuit cost.
It is preferred embodiments of the present invention above, does not depart from this reality for those of ordinary skill in the art
Under the premise of with new principle, several variations and modifications can also be made, these also should be regarded as the protection scope of the utility model.
Claims (10)
1. a kind of multiplexing control circuit of key in conjunction with communication function, it is characterised in that: including reception for receiving data
Unit, the microprocessor for handling the received data of receiving unit and the transmitting unit for emitting data, the reception are single
Member connects microprocessor with transmitting unit；The first operating mode and the second operating mode are preset in the microprocessor, it is described
Transmitting unit emits detection light, and detection light is received after being reflected by receiving unit, and receiving unit sends the detection light after reflection
To microprocessor, microprocessor judges that multiplexing control circuit should be at the first Working mould according to the duration of the detection light received
Formula or the second operating mode, and control multiplexing control circuit and be in the first operating mode or the second operating mode.
2. multiplexing control circuit of the key according to claim 1 in conjunction with communication function, it is characterised in that: further include electricity
Source control unit and power supply unit, the power control unit connection microprocessor and power supply unit, power control unit is by micro-
Processor control, power control unit are separately connected transmitting unit and receiving unit, single to transmitting under control of the microprocessor
Member and receiving unit power supply power off.
3. multiplexing control circuit of the key according to claim 2 in conjunction with communication function, it is characterised in that: the power supply
Control unit include the first triode, first triode base stage connection microprocessor power control pin, the one or three
The emitter of pole pipe connects power supply unit, the collector connection receiving unit and transmitting unit of the first triode.
4. multiplexing control circuit of the key according to claim 3 in conjunction with communication function, it is characterised in that: the power supply
Control unit further includes first resistor and first capacitor, and the base stage of first triode connects microprocessor by first resistor
Power control pin, the collector of the first triode passes through first capacitor and is grounded.
5. multiplexing control circuit of the key according to claim 4 in conjunction with communication function, it is characterised in that: the transmitting
Unit includes emitting diode, the second triode, and the emitter of second triode connects the collector of the first triode, the
Two transistor bases connect the data output pins of microprocessor, and the collector connection emitting diode of the second triode is just
Pole, the cathode ground connection of the emitting diode.
6. multiplexing control circuit of the key according to claim 5 in conjunction with communication function, it is characterised in that: the transmitting
Unit further includes second resistance, 3rd resistor and the 4th resistance, and the emitter of second triode is connected by second resistance
Second transistor base, second transistor base connect data output pins, the second triode current collection by 3rd resistor
Pole connects the anode of emitting diode by the 4th resistance.
7. multiplexing control circuit of the key according to claim 4 in conjunction with communication function, it is characterised in that: the reception
Unit includes reception pipe and third transistor, and the anode of the reception pipe connects the collector of the second triode, and reception pipe is born
Pole connects the base stage of third transistor, and third transistor collector connects the letter data of microprocessor after connecting with reception pipe anode
Pin is received, is grounded after the emitter of the emitter connection reception pipe of third transistor.
8. multiplexing control circuit of the key according to claim 7 in conjunction with communication function, it is characterised in that: the reception
Unit further includes the 5th resistance, the 6th resistance and the 7th resistance, and the third transistor base stage is received by the connection of the 5th resistance
Pipe cathode；The third transistor collector connects reception pipe anode by the 6th resistance, and the data receiver pin is connected to
Between 6th resistance and third transistor collector；The third transistor emitter connects the negative of reception pipe by the 7th resistance
The connecting node of pole, the 7th resistance and third transistor is grounded.
9. multiplexing control circuit of the key according to claim 1 in conjunction with communication function, it is characterised in that: the transmitting
Unit includes emitting diode and the 8th resistance, and the anode of the emitting diode connects the electricity of microprocessor by the 8th resistance
Source controls pin, the cathode ground connection of emitting diode；The receiving unit includes reception pipe, the 9th resistance and the second capacitor, institute
State the first pulse pin that reception pipe anode connects microprocessor by the 9th resistance, reception pipe cathode ground connection, second electricity
Appearance is in parallel with reception pipe, and the reception pipe anode connect the second pulse pin of microprocessor with the node of the second capacitance connection.
10. multiplexing control circuit of the key as claimed in any of claims 1 to 9 in conjunction with communication function, special
Sign is: the transmitting unit includes emitting diode, and the emitting diode uses infrared light-emitting diode；The reception is single
Member includes reception pipe, and the reception pipe uses infrared receiving diode or infrared receiver triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920412011.9U CN209731206U (en) | 2019-03-28 | 2019-03-28 | A kind of multiplexing control circuit of key in conjunction with communication function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920412011.9U CN209731206U (en) | 2019-03-28 | 2019-03-28 | A kind of multiplexing control circuit of key in conjunction with communication function |
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| Publication Number | Publication Date |
|---|---|
| CN209731206U true CN209731206U (en) | 2019-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920412011.9U Active CN209731206U (en) | 2019-03-28 | 2019-03-28 | A kind of multiplexing control circuit of key in conjunction with communication function |
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| CN (1) | CN209731206U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111091701A (en) * | 2019-12-19 | 2020-05-01 | 浙江金卡智能水表有限公司 | Key triggering method and system based on infrared communication |
| CN114614809A (en) * | 2022-05-09 | 2022-06-10 | 杭州炬华科技股份有限公司 | Near-infrared light key circuit |
-
2019
- 2019-03-28 CN CN201920412011.9U patent/CN209731206U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111091701A (en) * | 2019-12-19 | 2020-05-01 | 浙江金卡智能水表有限公司 | Key triggering method and system based on infrared communication |
| CN114614809A (en) * | 2022-05-09 | 2022-06-10 | 杭州炬华科技股份有限公司 | Near-infrared light key circuit |
| CN114614809B (en) * | 2022-05-09 | 2022-08-16 | 杭州炬华科技股份有限公司 | Near-infrared light key circuit |
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