CN109547068A - A kind of visible light communication carrier equipment and working method based on low-voltage power line - Google Patents
A kind of visible light communication carrier equipment and working method based on low-voltage power line Download PDFInfo
- Publication number
- CN109547068A CN109547068A CN201811501340.7A CN201811501340A CN109547068A CN 109547068 A CN109547068 A CN 109547068A CN 201811501340 A CN201811501340 A CN 201811501340A CN 109547068 A CN109547068 A CN 109547068A
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- Prior art keywords
- power line
- low
- microprocessor
- voltage power
- signal
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
- H04B10/114—Indoor or close-range type systems
- H04B10/116—Visible light communication
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
Abstract
The present invention provides a kind of visible light communication carrier equipment and working method based on low-voltage power line, the device includes: the low-voltage power line carrier communication module for data forwarding, for controlling the LED drive circuit of LED light flicker frequency in visible light communication system and the microprocessor that is connected with low-voltage power line carrier communication module and driving circuit respectively, low-voltage power line carrier communication module demodulate to the signal transmitted via low-voltage power line and the signal after demodulation is transmitted to microprocessor, microprocessor is handled the signal after demodulation to control the output of the level of LED drive circuit, to control LED light flicker frequency.The present invention transmits control signal in visible light communication system using existing low-voltage power line, and the signal transmission of long range, and good confidentiality are just able to achieve in the case where not needing and in addition setting up channel, is had broad application prospects.
Description
Technical field
The present invention relates to low-voltage powerline carrier communication fields and visible light communication field, more particularly to one kind to be based on low pressure
The visible light communication carrier equipment and working method of power line.
Background technique
Power line carrier communication is to carry out a kind of special of high speed data transfer as information transmitting medium using power line
Communication mode.Its maximum feature is to carry out data transmission using existing power line, because without assuming network again.
And the rise of continuous development and household intelligent system topic recently as low voltage power line carrier chip, this communication technology
Just more and more paid attention to.
In recent years, light emitting semiconductor device LED has obtained quick development.This novel illumination mode has modulating performance
It is good, response sensitivity is high, without advantages such as electromagnetic interferences, can transmit signal with the unrecognized high frequency of human eye, can be low
Cost realizes the wireless communication of high bandwidth and high-speed, thus expedited the emergence of out visible light communication this collect illumination and communication function in
The completely new communication mode of the whole body.
Currently, how efficiently data to be transferred to the hair of visible light communication system in technical field of visible light communication
Sending end is to influence a problem of the technology large-scale application.In the prior art, generally by utilizing WiFi technology or bluetooth
Technology transfers data to the transmitting terminal of visible light communication system, these methods require to install additional hardware device additional, and
Transmission range is short, and penetration capacity is weak, and applicable environment is limited.
It would therefore be highly desirable to a kind of new communication carrier device and working method for visible light communication system be proposed, with reality
The long range high efficiency of transmission of existing data.
Summary of the invention
The purpose of the present invention is to solve drawbacks described above in the prior art, provide it is a kind of based on low-voltage power line can
Light-exposed communication carrier device and working method.
The first purpose of this invention is achieved through the following technical solutions:
A kind of visible light communication carrier equipment based on low-voltage power line, the visible light communication carrier equipment include:
For the low-voltage power line carrier communication module of data forwarding, for controlling LED light flicker frequency in visible light communication system
LED drive circuit and the microprocessor being connected respectively with low-voltage power line carrier communication module and driving circuit,
Wherein, the low-voltage power line carrier communication module demodulates simultaneously the signal transmitted via low-voltage power line
Signal after demodulation is transmitted to the microprocessor, the microprocessor handles to control the signal after demodulation
The level of the LED drive circuit exports, to drive LED light to dodge with different frequencies by the LED drive circuit
It is bright.
Further, the low-voltage power line carrier communication module includes electric power line carrier chip and power line interface electricity
Road；
The electric power line carrier chip uses SC1128 chip, which ground for power line communication carrier technology
System, there is band spectrum modulation/demodulator circuit, built-in spread spectrum/despreading, modulating/demodulating and with the function such as microcomputer series interface communication
Energy；
The power line interface circuit includes coupling circuit, bandpass filter and pre-amplifier, the coupling electricity
Signal on low-voltage power line is coupled on bandpass filter by road, and the bandpass filter is filtered signal, and leads to
It crosses the pre-amplifier to amplify filtered signal, is re-fed into the electric power line carrier chip and carries out at operation
Reason.
Further, the microprocessor uses technical grade microprocessor STM32F103, which is STMicw Electronics
(ST) company produces, and kernel is Cortex-M3；
The microprocessor is used to receive the demodulated signal of low-voltage power line carrier communication module transmission, then to having solved
LED drive circuit is controlled through output end of microprocessor after adjusting signal to be handled.
Further, the LED drive circuit include voltage-stabiliser tube, current-limiting resistance, the N-channel MOS pipe as switch,
LED light, current-limiting resistance, protection diode, power supply and two filter capacitors,
Wherein, the current-limiting resistance, the N-channel MOS pipe as switch, successively sequential series are connected to pressure stabilizing to LED light
Between the OUT terminal and the end GND of pipe, it is also parallel with a filter capacitor between the OUT terminal and the end GND of the voltage-stabiliser tube,
The protection diode, successively sequential series are connected between the end IN of voltage-stabiliser tube and the end GND power supply, described
Another filter capacitor is also parallel between the end IN and the end GND of voltage-stabiliser tube.
Further, N-channel MOS pipe turns on and off in the output control LED drive circuit of the microprocessor,
When the output of microprocessor is high level, N-channel MOS pipe is open-minded, and LED light is in the state of " bright "；When output is low level
When, N-channel MOS pipe shutdown, LED light is in the state of " going out ", i.e. output of the flicker frequency of LED light depending on microprocessor.
Second object of the present invention is achieved through the following technical solutions:
A kind of working method of the visible light communication carrier equipment based on low-voltage power line, the working method include with
Lower step:
The signal transmitted on low-voltage power line is coupled on bandpass filter by coupling circuit, by bandpass filter to signal
It is filtered, and filtered signal is amplified by pre-amplifier, be re-fed into electric power line carrier chip and carry out operation
Processing；
Electric power line carrier chip demodulates the filtered signal, and the signal after demodulation is sent to micro process
Device carries out operation；
Microprocessor the signal after the demodulation received is handled after through output end of microprocessor to LED drive circuit
Middle turning on and off for N-channel MOS pipe is controlled, and when the output of microprocessor is high level, N-channel MOS pipe is open-minded,
LED light is in the state of " bright "；When microprocessor output is low level, N-channel MOS pipe shutdown, LED light is in the shape of " going out "
State, the i.e. flicker frequency of LED light depend on the output of microprocessor.
The present invention has the following advantages and effects with respect to the prior art:
1), present invention efficiently solves existing transmission range when transmitting signal to visible light communication system transmitting terminal is short
The problem of.
2), the present invention is carried out data transmission using existing power line, does not need additionally to build transmission network, has been saved hard
Part cost.
Detailed description of the invention
Fig. 1 is the visible light communication carrier equipment logic diagram the present invention is based on low-voltage power line；
Fig. 2 is the power line interface logic diagram of mesolow Power Line Carrier Communication Module of the present invention；
Fig. 3 is LED drive circuit schematic diagram in the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Embodiment
As shown in Fig. 1, present embodiment discloses a kind of visible light communication carrier equipment based on low-voltage power line, signal
It is transferred to low-voltage power line carrier communication module via low-voltage power line, low-voltage power line carrier communication module carries out the signal
After demodulation, the signal after demodulation is sent to microprocessor and carries out operation.Microprocessor controls LED driving electricity according to operation result
Road, so that LED light be made to be flashed with different frequencies.
Such as interface circuit of the Fig. 2 between low-voltage power line carrier communication module and power line.Coupling circuit are by low-voltage power
The signal transmitted on line is coupled on bandpass filter, and bandpass filter is by the waveform of the non-communicating frequency range in the signal received
After elimination, transfers signals to pre-amplifier and amplify.Amplified signal is sent electric power by last pre-amplifier
Line carrier chip carries out calculation process.
Such as the schematic diagram that Fig. 3 is LED drive circuit, power supply provides stable driving voltage after voltage-stabiliser tube for LED light.It is micro-
N-channel MOS pipe turns on and off in the output control LED drive circuit of processor.When the output of microprocessor is high level
When, N-channel MOS pipe is open-minded, and LED light is in the state of " bright "；When output is low level, N-channel MOS pipe is turned off, at LED light
In the state of " going out ", i.e. output of the flicker frequency of LED light depending on microprocessor.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, other any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present invention,
It should be equivalent substitute mode, be included within the scope of the present invention.
Claims (6)
1. a kind of visible light communication carrier equipment based on low-voltage power line, which is characterized in that the visible light communication carrier wave
Device includes: to dodge for the low-voltage power line carrier communication module of data forwarding, for controlling LED light in visible light communication system
The LED drive circuit of bright frequency and the microprocessor being connected respectively with low-voltage power line carrier communication module and driving circuit,
Wherein, the low-voltage power line carrier communication module carries out demodulation to the signal transmitted via low-voltage power line and will solution
Signal after tune is transmitted to the microprocessor, and the microprocessor handles described in control the signal after demodulation
LED drive circuit level output, thus by the described LED drive circuit driving LED light with different frequency scintillations.
2. a kind of visible light communication carrier equipment based on low-voltage power line according to claim 1, which is characterized in that
The low-voltage power line carrier communication module includes electric power line carrier chip and power line interface circuit；
The electric power line carrier chip use SC1128 chip, have band spectrum modulation/demodulator circuit, built-in spread spectrum/despreading,
Modulating/demodulating and with microcomputer series interface communication function；
The power line interface circuit includes coupling circuit, bandpass filter and pre-amplifier, and the coupling circuit will
Signal on low-voltage power line is coupled on bandpass filter, and the bandpass filter is filtered signal, and passes through institute
The pre-amplifier stated amplifies filtered signal, is re-fed into the electric power line carrier chip and carries out calculation process.
3. a kind of visible light communication carrier equipment based on low-voltage power line according to claim 1, which is characterized in that
The microprocessor uses technical grade microprocessor STM32F103, and kernel is Cortex-M3；
The microprocessor is used to receive the demodulated signal of low-voltage power line carrier communication module transmission, then to having demodulated letter
LED drive circuit is controlled through output end of microprocessor after number being handled.
4. a kind of visible light communication carrier equipment based on low-voltage power line according to claim 1, which is characterized in that institute
The LED drive circuit stated includes voltage-stabiliser tube, current-limiting resistance, the N-channel MOS pipe as switch, LED light, current-limiting resistance, protection two
Pole pipe, power supply and two filter capacitors,
Wherein, the current-limiting resistance, the N-channel MOS pipe as switch, successively sequential series are connected to voltage-stabiliser tube to LED light
Between OUT terminal and the end GND, it is also parallel with a filter capacitor between the OUT terminal and the end GND of the voltage-stabiliser tube,
The protection diode, successively sequential series are connected between the end IN of voltage-stabiliser tube and the end GND power supply, the pressure stabilizing
Another filter capacitor is also parallel between the end IN and the end GND of pipe.
5. a kind of visible light communication carrier equipment based on low-voltage power line according to claim 1, which is characterized in that institute
N-channel MOS pipe turns on and off in the output control LED drive circuit for the microprocessor stated, when the output of microprocessor is
When high level, N-channel MOS pipe is open-minded, and LED light is in the state of " bright "；When output is low level, the shutdown of N-channel MOS pipe,
LED light is in the state of " going out ", i.e. output of the flicker frequency of LED light depending on microprocessor.
6. a kind of working method of the visible light communication carrier equipment based on low-voltage power line, which is characterized in that the work
Method the following steps are included:
The signal transmitted on low-voltage power line is coupled on bandpass filter by coupling circuit, is carried out by bandpass filter to signal
Filtering, and filtered signal is amplified by pre-amplifier, it is re-fed into electric power line carrier chip and carries out calculation process；
Electric power line carrier chip demodulates the filtered signal, by the signal after demodulation be sent to microprocessor into
Row operation；
Microprocessor the signal after the demodulation received is handled after through output end of microprocessor to N in LED drive circuit
Turning on and off for channel MOS tube is controlled, and when the output of microprocessor is high level, N-channel MOS pipe is open-minded, LED light
State in " bright "；When microprocessor output is low level, N-channel MOS pipe shutdown, LED light is in the state of " going out ", i.e.,
The flicker frequency of LED light depends on the output of microprocessor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811501340.7A CN109547068A (en) | 2018-12-10 | 2018-12-10 | A kind of visible light communication carrier equipment and working method based on low-voltage power line |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811501340.7A CN109547068A (en) | 2018-12-10 | 2018-12-10 | A kind of visible light communication carrier equipment and working method based on low-voltage power line |
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| CN109547068A true CN109547068A (en) | 2019-03-29 |
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| CN201811501340.7A Pending CN109547068A (en) | 2018-12-10 | 2018-12-10 | A kind of visible light communication carrier equipment and working method based on low-voltage power line |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102752025A (en) * | 2012-07-20 | 2012-10-24 | 天津工大瑞工光电技术有限公司 | Communication system based on power line and visible lights |
| CN102769978A (en) * | 2012-07-20 | 2012-11-07 | 天津工大瑞工光电技术有限公司 | Stage lighting control system based on electric carrier communication |
| CN103313473A (en) * | 2013-05-29 | 2013-09-18 | 杭州电子科技大学 | Power line carrier communication-based light-emitting diode (LED) dimming circuit |
| CN108736969A (en) * | 2017-04-20 | 2018-11-02 | 桂林电子科技大学 | A kind of power line carrier communication coordinate under visible light beacon system |
-
2018
- 2018-12-10 CN CN201811501340.7A patent/CN109547068A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102752025A (en) * | 2012-07-20 | 2012-10-24 | 天津工大瑞工光电技术有限公司 | Communication system based on power line and visible lights |
| CN102769978A (en) * | 2012-07-20 | 2012-11-07 | 天津工大瑞工光电技术有限公司 | Stage lighting control system based on electric carrier communication |
| CN103313473A (en) * | 2013-05-29 | 2013-09-18 | 杭州电子科技大学 | Power line carrier communication-based light-emitting diode (LED) dimming circuit |
| CN108736969A (en) * | 2017-04-20 | 2018-11-02 | 桂林电子科技大学 | A kind of power line carrier communication coordinate under visible light beacon system |
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