CN209313839U - A kind of simple two-way signal input visible light communication system based on large power white light LED - Google Patents
A kind of simple two-way signal input visible light communication system based on large power white light LED Download PDFInfo
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- CN209313839U CN209313839U CN201921166663.5U CN201921166663U CN209313839U CN 209313839 U CN209313839 U CN 209313839U CN 201921166663 U CN201921166663 U CN 201921166663U CN 209313839 U CN209313839 U CN 209313839U
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Abstract
The utility model discloses a kind of, and the simple two-way signal based on large power white light LED inputs visible light communication system, including receiving end, transmitting terminal and line style D.C. regulated power supply, and line style D.C. regulated power supply connects receiving end and transmitting terminal, and transmitting terminal connects receiving end；The transmitting terminal includes the road A transmitting terminal circuit and the road B transmitting terminal circuit.Have the advantage that transmitting terminal inputs two-way analog signal, optical signal is converted to using analog signal of the two-way transmit circuit to input, and the analog signal wherein inputted all the way is modulated, the analog signal of input is modulated into the optical signals of the light carrier Strength Changes of LED through White LED Drive output optical signal, the analog signal in addition inputted all the way is amplified to directly drive white light LEDs output optical signal.
Description
Technical field
The utility model is a kind of simple two-way signal input visible light communication system based on large power white light LED, belongs to electricity
Sub- field of communication technology.
Background technique
Visible light communication technology is dodged using the high speed light and shade of the sendings such as fluorescent lamp or light emitting diode being invisible to the naked eye
Bright signal transmits information, and the wire device of high-speed Internet is connected on lighting device, and insertion attaching plug can make
With.The system being made into using this technology can cover the range that indoor light reaches, and computer does not need electric wire connection, thus has
There is extensive development prospect.
Compared with WLAN used at present (Wireless LAN), " visible light communication " system can be set using room lighting
Standby that Wireless LAN lan base station is replaced to emit signal, communication speed is up to per second tens of million to hundreds of million, future transmission speed
It is also possible to be more than fiber optic communication.Using computer and personal digital assistant device dedicated, that be capable of sending and receiving semiotic function, as long as in room
The place that interior light shines, so that it may download and upload for a long time the data such as high-resolution portrait and animation.The system also has peace
The feature of Quan Xinggao.Light is covered with curtain, information would not leak to outdoor, while will not influence to lead to using multiple computers
Believe speed.
The optical signal launch end of existing visible light communication system has the following problems:
1, transmitting terminal inputs single analog signal；
2, transmitting terminal is not modulated the analog signal of input, the analog signal of input cannot be modulated into LED's
The optical signal of light carrier Strength Changes.
Utility model content
The technical problems to be solved in the utility model is against the above deficiency, to provide a kind of based on large power white light LED
Simple two-way signal inputs visible light communication system, and transmitting terminal inputs two-way analog signal, using two-way transmit circuit to the mould of input
Quasi- signal is converted to optical signal, and is modulated to the analog signal wherein inputted all the way, and the analog signal of input is modulated into
The optical signal of the light carrier Strength Changes of LED is through White LED Drive output optical signal, the analog signal that in addition inputs all the way
It is amplified to directly drive white light LEDs output optical signal.
In order to solve the above technical problems, the utility model uses following technical scheme:
A kind of simple two-way signal based on large power white light LED inputs visible light communication system, including receiving end, transmitting terminal and
Line style D.C. regulated power supply, line style D.C. regulated power supply connect receiving end and transmitting terminal, and transmitting terminal connects receiving end；
The transmitting terminal include the road A transmitting terminal circuit and the road B transmitting terminal circuit, the road A transmitting terminal circuit include the road A audio or
Analog waveform signal, the road A audio or analog signal are connected with the road A signal amplification module, and the road A signal amplification module is connected with the road A
Signal modulation module, the road A signal modulation module are connected with LED driver circuit module, and LED driver circuit module is connected with white light
LED emits optical signal module；The road B transmitting terminal circuit includes the road B analog waveform signal, and the road B analog waveform signal is connected with the road B letter
Number amplification module, the road B signal amplification module are connected with LED driver circuit module, and LED driver circuit module is connected with white light LEDs
Emit optical signal.
Further, the road the A signal amplification module includes resistance R4, and the one end resistance R4 connects the road A audio or analog wave
Shape signal, the resistance R4 other end are connected with the one end capacitor C2, the capacitor C2 other end be connected with the one end resistance R2, the one end resistance R7 and
The collector access 12V power supply of the base stage of triode Q1, resistance R7 other end ground connection, the resistance R2 other end and triode Q1, three
The emitter of pole pipe Q1 is connected with the one end resistance R8 and the road A signal modulation module, resistance R8 other end ground connection.
Further, the road A signal modulation module includes chip U1, the model LM567 of chip U1, the 2 of chip U1
Foot is connected with the one end capacitor C3 and the one end capacitor C5, capacitor C5 other end ground connection, and the capacitor C3 other end is connected with triode Q1's
Emitter, 1 foot of chip U1 are connected with the one end capacitor C1 and the one end resistance R1, another termination 12V power supply of resistance R1, and capacitor C1 is another
One end ground connection.
Further, 5 feet of chip U1 are connected with the one end resistance R5 and the one end adjustable resistance R6, the adjustable resistance R6 other end
It is connected with 6 feet and the one end capacitor C4 of chip U1, capacitor C4 other end ground connection, the resistance R5 other end is connected with the base of triode Q2
Pole, the collector of triode Q2 are connected with the one end resistance R3, and the emitter of another termination 12V power supply of resistance R3, triode Q2 connects
Connect LED driver circuit module and, and be grounded.
Further, the road the B signal amplification module includes resistance R13, and the one end resistance R13 connects the road B analog waveform letter
Number, the resistance R13 other end is connected with the one end capacitor C8, the capacitor C8 other end be connected with the one end resistance R10, the one end resistance R14 and
The collector of the base stage of triode Q4, resistance R14 other end ground connection, the resistance R10 other end and triode Q4 access 12V power supply,
The emitter of triode Q4 is connected with the one end resistance R15, and connects LED driver circuit module, resistance R15 other end ground connection.
Further, the LED driver circuit module includes capacitor C7 and capacitor C6, and the one end capacitor C7 is connected with triode
The emitter of Q4, one end of capacitor C6 are connected with the emitter of triode Q2, and the capacitor C7 other end is connected with the capacitor C6 other end
There are base stage, the one end resistance R11 and the one end adjustable resistance R9 of triode Q3, the resistance R11 other end is grounded, and adjustable resistance R9 is another
Terminate 24V power supply.
Further, the collector of the triode Q3 is connected with the one end light emitting diode D1, and light emitting diode D1 is another
24C power supply is terminated, the emitter of triode Q3 is connected with the one end resistance R12, resistance R12 other end ground connection.
Further, the transmitting terminal converts analog signals into optical signal, through White LED Drive by electric signal tune
The optical signal of the light carrier Strength Changes of LED is made, is emitted in the form of light beam, then is turned optical signal by PIN photodiode
Change electric signal into, receiving terminal circuit handles signal, finally restores analog signal.
Further, the line style D.C. regulated power supply includes voltage changing module, rectification module, filter module, Voltage stabilizing module,
The alternating current of 220V becomes DC voltage after voltage changing module is depressured after rectified module, be then input to surely through filter module
Die block finally exports 24V in the output end of Voltage stabilizing module, is powered to each module.
The utility model is had the following technical effect that compared with prior art using above technical scheme
Visible light communication system described in the utility model based on large power white light LED, transmitting terminal input two-way simulation
Signal is converted to optical signal using analog signal of the two-way transmit circuit to input, and to the analog signal wherein inputted all the way
It is modulated, the optical signal that the analog signal of input is modulated into the light carrier Strength Changes of LED is defeated through White LED Drive
Optical signals, the analog signal in addition inputted all the way is amplified to directly drive white light LEDs output optical signal.
The utility model is described in detail with reference to the accompanying drawings and examples.
Detailed description of the invention
Fig. 1 is the structural block diagram of visible light communication system in the utility model embodiment；
Fig. 2 is the structural block diagram of transmitting terminal in the utility model embodiment；
Fig. 3 is the circuit diagram of transmitting terminal in the utility model embodiment；
Fig. 4 is the structural block diagram of receiving end in the utility model embodiment.
Specific embodiment
Embodiment 1, as shown in Figure 1, a kind of simple two-way signal based on large power white light LED inputs visible light communication system,
Including receiving end, transmitting terminal and line style D.C. regulated power supply, line style D.C. regulated power supply connects receiving end and transmitting terminal, transmitting terminal
Connect receiving end.
The transmitting terminal converts analog signals into optical signal, and electric signal is modulated into LED's through White LED Drive
The optical signal of light carrier Strength Changes is emitted in the form of light beam, then converts optical signals into telecommunications by PIN photodiode
Number, receiving terminal circuit handles signal, finally restores analog signal.
The line style D.C. regulated power supply includes voltage changing module, rectification module, filter module, Voltage stabilizing module, the friendship of 220V
Galvanic electricity becomes DC voltage after the transformer pressure-reducing of voltage changing module after the rectifier bridge stack of rectified module, then through filtering mould
The filter capacitor of block is input to the three terminal integrated voltage stabilizer LM317 of Voltage stabilizing module, finally exports 24V in the output end of LM317, right
Each module is powered.
As shown in Fig. 2, the transmitting terminal includes the road A transmitting terminal circuit and the road B transmitting terminal circuit, the road A emits terminal circuit packet
The road A audio or analog waveform signal are included, the road A audio or analog signal are connected with the road A signal amplification module, and the road A signal amplifies mould
Block is connected with the road A signal modulation module, and the road A signal modulation module is connected with LED driver circuit module, LED driver circuit module
It is connected with white light LEDs transmitting optical signal module；It includes the road B analog waveform signal, the road B analog waveform signal that the road B, which emits terminal circuit,
It is connected with the road B signal amplification module, the road B signal amplification module is connected with LED driver circuit module, and LED driver circuit module connects
It is connected to white light LEDs transmitting optical signal.
As shown in figure 3, the road the A signal amplification module includes resistance R4, the one end resistance R4 connects the road A audio or analog wave
Shape signal, the resistance R4 other end are connected with the one end capacitor C2, the capacitor C2 other end be connected with the one end resistance R2, the one end resistance R7 and
The collector access 12V power supply of the base stage of triode Q1, resistance R7 other end ground connection, the resistance R2 other end and triode Q1, three
The emitter of pole pipe Q1 is connected with the one end resistance R8 and the road A signal modulation module, resistance R8 other end ground connection.
The road A signal modulation module includes chip U1, and 2 feet of the model LM567 of chip U1, chip U1 are connected with electricity
Hold the one end C3 and the one end capacitor C5, capacitor C5 other end ground connection, the capacitor C3 other end is connected with the emitter of triode Q1, chip
1 foot of U1 is connected with the one end capacitor C1 and the one end resistance R1, another termination 12V power supply of resistance R1, capacitor C1 other end ground connection, core
5 feet of piece U1 are connected with the one end resistance R5 and the one end adjustable resistance R6, the adjustable resistance R6 other end be connected with chip U1 6 feet and
The one end capacitor C4, capacitor C4 other end ground connection, the resistance R5 other end are connected with the base stage of triode Q2, the collector of triode Q2
Be connected with the one end resistance R3, another termination 12V power supply of resistance R3, the emitter connection LED driver circuit module of triode Q2 and,
And it is grounded.
The road the B signal amplification module includes resistance R13, and the one end resistance R13 connects the road B analog waveform signal, resistance R13
The other end is connected with the one end capacitor C8, and the capacitor C8 other end is connected with the one end resistance R10, the one end resistance R14 and triode Q4
The collector of base stage, resistance R14 other end ground connection, the resistance R10 other end and triode Q4 access 12V power supply, triode Q4's
Emitter is connected with the one end resistance R15, and connects LED driver circuit module, resistance R15 other end ground connection.
The LED driver circuit module includes capacitor C7 and capacitor C6, and the one end capacitor C7 is connected with the transmitting of triode Q4
Pole, one end of capacitor C6 are connected with the emitter of triode Q2, and the capacitor C7 other end and the capacitor C6 other end are connected with triode
Base stage, the one end resistance R11 and one end adjustable resistance R9 of Q3, resistance R11 other end ground connection, another termination 24V of adjustable resistance R9
Power supply, the collector of triode Q3 are connected with the one end light emitting diode D1, another termination 24C power supply of light emitting diode D1, three poles
The emitter of pipe Q3 is connected with the one end resistance R12, resistance R12 other end ground connection.
The road A input analog signal is amplified, then the centre frequency of LM567 is modulated: at analog signal
When the ascent stage, modulating frequency is controlled by the 2 foot voltage controlled oscillator control terminals of chip U1, is increased on the basis of f0；Work as simulation
It when signal is in descending branch, is reduced on the basis of f0, to realize frequency modulation(PFM).Modulated signal is defeated through 5 feet of LM567
Out, amplified driving white light LEDs output optical signal；For transmitting module, after inputting two-way analog signal, in order to enable receiving end
Two paths of signals can be distinguished, analog signal is amplified to directly drive white light LEDs output optical signal so the road B inputs.
As shown in figure 4, the receiving end includes PIN photodiode, PIN photodiode is connected with the road A receiving end electricity
Road and the road B receiving terminal circuit, the road A receiving terminal circuit include high-pass filtering module, and high-pass filtering module is connected with the road A amplification mould
Block, the road A amplification module are connected with clipping module, and clipping module is connected with signal demodulation module, and signal demodulation module is connected with the road A
Pre-amplifying module, the road A pre-amplifying module are connected with the road A power amplifier module, and the road A power amplifier module is connected with audio output module；B
Road receiving terminal circuit includes low-pass filtering module, and low-pass filtering module is connected with the road B pre-amplifying module, the preposition amplification mould in the road B
Block is connected with the road B power amplifier module, and the road B power amplifier module is connected with audio output module.
Main task is recovered after visible channel transmits with the smallest additional noise and distortion on the receiving end
Information entrained by light carrier.PIN photodiode handles the signal received through two-way circuit.The road A receives circuit
Including high-pass filtering module, clipping module, signal demodulation module, pre-amplifying module, power amplification not enough, audio output module
Deng.It includes low-pass filtering module, pre-amplifying module, power amplifier module, audio output module that the road B, which receives circuit,.PIN photoelectricity
Diode will the signal that received filtering after carry out voltage amplification, be then input to power amplification circuit carry out power amplification to
Driving loudspeaker release audio signal.Signal demodulation module solves the electric signal after conversion by being amplified into LM567
It adjusts, then inputs the road A pre-amplifying module, the centre frequency of adjustment receiving end LM567 makes the LM567 of receiving end and transmitting terminal
Centre frequency can unanimously be correctly obtained output signal.
PIN photodiode detects incident light and is converted into the form of electric current, but photoelectric current is very faint, so just needing
Amplify by amplifier, in order to obtain certain amplitude and smooth output, two-stage amplification should be designed, preamplifier is main
Electric current-voltage transformation function is played, converts photoelectric current to the voltage being easily processed, due to the structure in multistage amplification
In, the noise of prime can be amplified with useful signal by rear stage, by fries formula it is found that the noise coefficient of casacade multi-amplifier
F approximation depends on the noise coefficient F1 of the first order, and therefore, preamplifier should have the characteristics that low noise, high-gain.
Description of the utility model is given for the purpose of illustration and description, and is not that exhaustively or incite somebody to action this
Utility model is limited to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.
Selection and description embodiment are and to make the common of this field to better illustrate the principles of the present invention and practical application
Technical staff it will be appreciated that the utility model to designing various embodiments suitable for specific applications with various modifications.
Claims (1)
1. a kind of simple two-way signal based on large power white light LED inputs visible light communication system, it is characterised in that: including receiving
End, transmitting terminal and line style D.C. regulated power supply, line style D.C. regulated power supply connect receiving end and transmitting terminal, and transmitting terminal connection receives
End；
The transmitting terminal includes the road A transmitting terminal circuit and the road B transmitting terminal circuit, and it includes the road A audio or simulation that the road A, which emits terminal circuit,
Waveform signal, the road A audio or analog signal are connected with the road A signal amplification module, and the road A signal amplification module is connected with the road A signal
Modulation module, the road A signal modulation module are connected with LED driver circuit module, and LED driver circuit module is connected with white light LEDs hair
Penetrate optical signal module；It includes the road B analog waveform signal that the road B, which emits terminal circuit, and the road B analog waveform signal is connected with the road B signal and puts
Big module, the road B signal amplification module are connected with LED driver circuit module, and LED driver circuit module is connected with white light LEDs transmitting
Optical signal；
The road the A signal amplification module includes resistance R4, and the one end resistance R4 connects the road A audio or analog waveform signal, resistance R4
The other end is connected with the one end capacitor C2, and the capacitor C2 other end is connected with the base of the one end resistance R2, the one end resistance R7 and triode Q1
The collector of pole, resistance R7 other end ground connection, the resistance R2 other end and triode Q1 access 12V power supply, the transmitting of triode Q1
Pole is connected with the one end resistance R8 and the road A signal modulation module, resistance R8 other end ground connection；
The road A signal modulation module includes chip U1, the model LM567 of chip U1；
2 feet of the chip U1 are connected with the one end capacitor C3 and the one end capacitor C5, capacitor C5 other end ground connection, the capacitor C3 other end
It is connected with the emitter of triode Q1,1 foot of chip U1 is connected with the one end capacitor C1 and the one end resistance R1, another termination of resistance R1
12V power supply, capacitor C1 other end ground connection；
5 feet of the chip U1 are connected with the one end resistance R5 and the one end adjustable resistance R6, and the adjustable resistance R6 other end is connected with core
6 feet of piece U1 and the one end capacitor C4, capacitor C4 other end ground connection, the resistance R5 other end are connected with the base stage of triode Q2, three poles
The collector of pipe Q2 is connected with the one end resistance R3, and the emitter connection LED of another termination 12V power supply of resistance R3, triode Q2 drives
Dynamic circuit module and, and be grounded；
The road the B signal amplification module includes resistance R13, and the one end resistance R13 connects the road B analog waveform signal, and resistance R13 is another
End is connected with the one end capacitor C8, and the capacitor C8 other end is connected with the base stage of the one end resistance R10, the one end resistance R14 and triode Q4,
The collector of resistance R14 other end ground connection, the resistance R10 other end and triode Q4 access 12V power supply, the emitter of triode Q4
It is connected with the one end resistance R15, and connects LED driver circuit module, resistance R15 other end ground connection；
The LED driver circuit module includes capacitor C7 and capacitor C6, and the one end capacitor C7 is connected with the emitter of triode Q4, electricity
The one end for holding C6 is connected with the emitter of triode Q2, and the capacitor C7 other end and the capacitor C6 other end are connected with the base of triode Q3
Pole, the one end resistance R11 and the one end adjustable resistance R9, resistance R11 other end ground connection, another termination 24V power supply of adjustable resistance R9；
The collector of the triode Q3 is connected with the one end light emitting diode D1, another termination 24C power supply of light emitting diode D1, and three
The emitter of pole pipe Q3 is connected with the one end resistance R12, resistance R12 other end ground connection；
The line style D.C. regulated power supply includes voltage changing module, rectification module, filter module, Voltage stabilizing module, the alternating current of 220V
After voltage changing module is depressured, become DC voltage after rectified module, is then input to Voltage stabilizing module through filter module, finally exists
The output end of Voltage stabilizing module exports 24V, is powered to each module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921166663.5U CN209313839U (en) | 2019-07-24 | 2019-07-24 | A kind of simple two-way signal input visible light communication system based on large power white light LED |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921166663.5U CN209313839U (en) | 2019-07-24 | 2019-07-24 | A kind of simple two-way signal input visible light communication system based on large power white light LED |
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| Publication Number | Publication Date |
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| CN209313839U true CN209313839U (en) | 2019-08-27 |
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| CN201921166663.5U Active CN209313839U (en) | 2019-07-24 | 2019-07-24 | A kind of simple two-way signal input visible light communication system based on large power white light LED |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112019273A (en) * | 2020-08-31 | 2020-12-01 | 尉氏县职业技术教育中心 | Two-way wireless audio transmission system based on white light LED |
| CN114126139A (en) * | 2021-11-30 | 2022-03-01 | 华南理工大学 | LED drive module with visible light communication function |
-
2019
- 2019-07-24 CN CN201921166663.5U patent/CN209313839U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112019273A (en) * | 2020-08-31 | 2020-12-01 | 尉氏县职业技术教育中心 | Two-way wireless audio transmission system based on white light LED |
| CN114126139A (en) * | 2021-11-30 | 2022-03-01 | 华南理工大学 | LED drive module with visible light communication function |
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