CN207560383U - A kind of lighting device based on LED visible light communication - Google Patents

Abstract

The utility model is a kind of lighting device based on LED visible light communication, which includes：LED illumination lamp (1), driving power (2), optical communication transmission end (3), optic communication receiving terminal (4) and intelligent controller (5)；The power output end of wherein driving power (2) connects LED illumination lamp (1) driving LED illumination lamp (1), intelligent controller (5) is with RS485 interfaces and WIFI interface, pass through the transmission of signal between RS485 realizations optical communication transmission end (3), optic communication receiving terminal (4) and intelligent controller (5), mutual connection is realized by WIFI, forms an entirety.It is designed by system, the design philosophy of global control, realizes centralization intelligent control and the management of lighting system.The intelligence control system of digital network can using electricity wisely to the maximum extent, reduce maintaining expense, the LED illumination optical communication system can make building electric consumption on lighting save more than 50%, reach domestically leading level.

Description

A kind of lighting device based on LED visible light communication

Technical field

The utility model is related to electronic technology field more particularly to a kind of lighting system necks based on LED visible light communication Domain.

Background technology

In recent years, the semi-conductor LED illuminating technology development for being known as " green illumination " is swift and violent.LED belongs to typical green Color lighting source, compared with conventional illumination device, LED has the advantages that use voltage is low, low in energy consumption, the service life is low etc..LED is other Outstanding advantages are in response to that high sensitivity, modulating performance are good, transmission power is big, are suitable as short-distance and medium-distance high-speed radio optic communication system The light source of system.Using the luminescence response characteristic of semiconductor LED device high speed point off, modulate the signal in LED visible light and carry out Transmission, makes visible light communication be combined with LED illumination, builds LED illumination optical communication system.

LED visible light communication lighting system is by LED lighting technology, LED Drive Control Techniques, photoinduction technology, intelligence A set of scheme that intelligent control is carried out to lighting system of the compositions such as control technology, mechanics of communication, is completely realized bright to light source The factors such as degree, colour temperature, scene, switch, time are combined control, not only embody the functionality of illumination, can more reach energy saving Environmental protection, intelligent easily purpose.LED visible light communication lighting system can be divided into hardware components and software section in terms of big, Hardware components include LED illumination device, LED drive power, sensor, control circuit, central controller (intelligent controller) etc., Software section is related to system control program.

LED visible light communication lighting system can change self brightness according to the power of ambient lighting, energy saving so as to generate Effect.Pulsewidth modulation (modulating pulse width) is by adjusting the duty ratio of pulse, to adjust voltage, electric current, power.PWM is dimmed The white light of high quality can be provided, it is efficient using simple, it implements and is easier, can apply in LED illumination optic communication In system.

Invention content

Technical problem：The utility model is mainly solving the technical problems that propose a kind of photograph based on LED visible light communication Bright device, which can not only provide area illumination, and can realize intellectual monitoring, intelligent control by singlechip technology, It can voluntarily adjust the brightness of lamps and lanterns according to the brightness of ambient enviroment, can also artificially control the brightness of lamps and lanterns.

Technical solution：The utility model is a kind of lighting device based on LED visible light communication, the illuminating apparatus packet It includes：LED illumination lamp, driving power, optical communication transmission end, optic communication receiving terminal and intelligent controller；Wherein driving power Power output end connects LED illumination lamp driving LED illumination lamp, and intelligent controller carries RS485 interfaces and WIFI interface, passes through The transmission of signal, is realized mutual by WIFI between RS485 realization optical communication transmissions end, optic communication receiving terminal and intelligent controller Connection, form an entirety.

Wherein,

The driving power band PWM dimming functions, the EMI filter circuit including sequential series connection, have rectification circuit Active power factor correction APFC circuits, isolating transformer, output driving circuit, PWM light adjusting circuits drive LED illumination lamp.

The optical communication transmission end includes USB interface, USB-UART bridge circuits, the C8051 control of sequential series connection Circuit, low-pass filter circuit.

The optic communication receiving terminal includes signal conditioning circuit, C8051 control circuits, the USB- of sequential series connection UART bridge circuits, USB interface.

The intelligent controller, signal input module realize respective sensor signals input single-chip data channel, In Control System Software, respectively by the signal of the signal of pyroscan and sound transducer after over commutation enhanced processing Switch data is processed into, is then input in processor and carries out operation；The environment light-supplementing amplified through over commutation, the big detection system of light intensity The signal that system generates divides two-way, is all the way Boolean, and the output with being generated after the processing of preceding two paths of signals carries out operation, thus produces The raw switching signal for determining lamp switch；In addition environmental data A/D is converted all the way, then the control as system adjustment brightness Signal coding is output to the output module of system, and intelligent lighting is realized by controlling LED light emission luminance.

Advantageous effect：Compared with prior art, the utility model has the advantages that：

1. being designed by system, the design philosophy of global control, centralization intelligent control and the management of lighting system are realized. The intelligence control system of digital network can using electricity wisely to the maximum extent, reduce maintaining expense, which leads to Letter system can make the electric consumption on lighting of building save more than 50%, reach domestically leading level.

2. innovatively design LED digitlizations are with an automatic light meter, illumination brightness not only can be artificially set, it can also basis Ambient conditions voluntarily adjusts illumination brightness, and the digitlization to light adjusting system is realized by information technology, realizes the intelligence control of light modulation System.

Automatic control light, effect is enriched, powerful.Lighting system based on LED visible light communication have to LED light source into The function of row control light, light efficiency, colour temperature, colour rendering index can be controlled intelligently, reach optimum efficiency, can be according to the unmanned shape of someone Condition, weather conditions automatically control lighting environment.

Lighting control is automated, centralized management is energy saving.Lighting system based on LED visible light communication has programming Function can set time, brightness, illumination control parameter, managed concentratedly and controlled by computer system.Due to the use of automatic Change Lighting control, LED visible light communication lighting system only needs a computer that can realize rational energy to entire illumination region Source control not only reduces unnecessary power consumption spending, while also reduces the operation and maintenance cost of user, in energy saving fermentation ratio More than 30% traditional lighting control economize on electricity.

It manages and easy to maintain, saves money.With intelligent detecting and intelligent control function, timing sends signal detection and shines The failure of bright system and the position for analyzing accident generation, the variation of illumination region light is controlled by mobile phone app freely.Control Device timing detection illuminating line, when some lamps and lanterns is unable to normal illumination, controller alarms and shows the position of failure lamps and lanterns. LED illumination optical communication system is by artificial switch conversion into intelligent management, and not only enabling illumination supervision, person is high-quality by its Management awareness applies in system, while greatly reduces lighting system operation and maintenance cost.

There is intelligent clock.It can be compiled by Timer/Counter module, real-time clock module and enabling dog module The time control program of lighting apparatus is write, the lighting apparatus in illumination region is divided into several groups, passes through time zone program Menu is set, sets the start-stop program of these lighting apparatus.Daily lighting system presses computer good time-program(me) prepared in advance, Automatically control the illumination of each illumination region.

Device intelligence controls, and reduces and destroys, and extends the service life.In LED illumination optical communication system, since system can be passed through Reasonably setting voltage limits, and can avoid or reduce the impact of network voltage and surge voltage to lamps and lanterns, so as to play protection The effect of lamps and lanterns, prolonging service lives of lamps.

PWM light adjusting circuits in driving power can control pwm signal, output current be made to change to control LED light The brightness of tool.

Description of the drawings

Fig. 1：Band PWM dimming function driving power hardware structure diagrams；

Fig. 2：Driving power EMI filter circuit；

Fig. 3：Driving power current rectifying and wave filtering circuit；

Fig. 4：Driving power APFC circuit diagrams；

Fig. 5：Driving power PWM light adjusting circuit schematic diagrams；

Fig. 6：Optical communication transmitter structure chart；

Fig. 7：Optical communication receiver structure chart；

Fig. 8：The general structure schematic diagram of the utility model, wherein having：LED illumination lamp 1, driving power 2, optic communication hair Penetrate end 3, optic communication receiving terminal 4, intelligent controller 5.

Specific embodiment

The utility model discloses a kind of lighting device based on LED visible light communication, including：LED illumination lamp, driving electricity Source, optical communication transmitter, optical communication receiver and intelligent controller.

The driving power band PWM dimming functions, mainly comprising EMI filter circuit, rectification circuit, active power factor school Just (APFC) circuit, isolating transformer, output driving circuit, LED light group, PWM light adjusting circuits etc..

Further：In the EMI filter circuit, C1 and C2 are using thin film capacitor, and capacity is set as 0.1uF, mainly For inhibiting series mode interference.In order to reduce leakage current, the capacitance of C3 and C4 are not greater than 0.1uF, are set as 2.2nF herein, The neutral earthing of C3 and C4 is connected to output terminal, suppression common mode can interfere well in this way.The pressure voltage of capacitance is not less than 250VAC.Inductance L3 does not work to string mould signal, very big induction reactance is only shown to common-mode signal, it is difficult to pass through to make common-mode signal It crosses, therefore L3 is referred to as common mode choke.In addition, such as think the characteristic of improvement low frequency signals decay, it should appropriately increase inductance value.

Further：The current rectifying and wave filtering circuit uses bridge rectifier filter circuit, and four diodes form rectifier bridge.Electricity Hold C5 and C6 and form filter circuit, the C5 filter low frequencies of 22uF, the C6 filter high frequencies of 0.1uF.The AC ripple of output is related with capacitance, Capacitance increases, and the AC ripple of output is reduced.

Further：In the APFC circuits, using the chip of the L6562A circuit of power factor correction of ST companies, APFC Circuit is as shown below.The APFC circuits, the direct current that rectifier bridge exports is by resistance R3 to the electricity of the VCC pin of L6562A Capacitor charging is solved, when the voltage on electrolytic capacitor is more than the startup voltage of L6562A, L6562A starts；In L6562A chips It needs to add in current-limiting resistance between ZCD pins and transformer winding；L6562A is operated in critical conduction mode, is turned off in power switch pipe When, switching loss occurs；

Further：The PWM light adjusting circuits can control pwm signal, output current be made to change to control LED light The brightness of tool.PT4205 forms PWM light adjusting circuits, and circuit is mainly by chip PT4205, current sampling resistor R15 and filter inductance L4 is formed.After the power is turned on, the output voltage of driving power is loaded on pin VIN, provides power supply for PT4205, PT4205 leads to The size conversion for crossing detection current sampling resistor R15 obtains voltage, and constant output current, filter inductance are obtained through internal comparator L4 filters the output current, and reduces the ripple of output current.Pwm signal addition can realize light modulation in 3 feet (DIM) of PT4205 Function, when 3 feet (DIM) voltage is less than 0.3V, LED current 0；When voltage is more than 2.5V, electric current is maximum.

The optical communication transmission end includes USB interface, USB-UART bridge circuits, C8051 control circuits, low-pass filtering electricity Road.

Further：The data transmitting equipments such as the USB interface, transmitter access PC provide the supply voltage of system 5V, And outgoing data is sent to transmitter.

Further：The USB-UART bridge circuits realize that USB and UART leads to using the CP2104 of Silicon Lab companies Believe protocol conversion, the data that PC machine is sent are sent into single chip machine controlling circuit, realize data transmitting equipments and the transmitters such as PC machine Communication.

Further：The core devices of the C8051 control circuits for high speed, low-power consumption, built-in 10 D/A Intel The C8051 microcontrollers of company.The data information that data receiver is sent exports 4 system arteries and veins under the control of C8051 microcontrollers Rush position modulation signal.

Further：The low-pass filter that the low-pass filter circuit is about 30KHz using passband, for eliminating parasitic letter Number interference.

The optic communication receiving terminal includes signal conditioning circuit, C8051 control circuits, USB-UART bridge circuits, USB and connects Mouthful.

Further：The signal conditioning circuit is amplified by signal conversion with amplitude limiter circuit, bandwidth-limited circuit and signal Circuit forms.After the optical signals light emitting diode of variation detected, first pass around first order operational amplifier circuit and realize electric current electricity The conversion of signal is pressed, and amplitude limiter circuit is added in first order operational amplifier circuit, so as to fulfill the detection to strong optical signal.It converts After the voltage signal arrived is by bandpass filter filtering interference signals, the amplifying circuit of input about 15dB gains is amplified, and is put Signal after big is output to single chip machine controlling circuit and carries out signal demodulation.

Further：10 A/D docking collections of letters number are sampled judgement in the C8051 microcontrollers, so as to fulfill 4PPM The demodulation of modulated signal.

Further：The USB-UART bridge circuits realize USB and UART communication Protocol Conversions using CP2104, and realization connects The communication of the data receivers such as receipts machine and PC machine.

Receiver is connected by the data receivers such as USB interface and PC machine, provides 5V supply voltages, and will receive data The data receivers such as PC machine are sent to show.

The LED illumination optical communication system Software for Design uses modular design method, and work(is set by core of main program Energy modular subroutine is with simplified design structure.In operational process, each function module subprogram, therefore lamps and lanterns are called by main program Control requirement of real time is not high, and loop control can be met the requirements.

LED illumination optical communication system working software mainly completes following functions：Signal input module realizes respective sensor Signal inputs single-chip data channel, in Control System Software, respectively by the signal of pyroscan and sound transducer Signal through over commutation enhanced processing post-process into switch data, be then input in processor and carry out operation；It is put through over commutation Big environment light-supplementing, the signal that the big detection system of light intensity generates divide two-way, are all the way Boolean, and with after the processing of preceding two paths of signals The output of generation carries out operation, thus generates the switching signal for determining lamp switch；In addition environmental data A/D is converted all the way, Then the output module of system is output to as the control Signal coding of system adjustment brightness, reaches control LED light emission luminance Purpose realizes intelligent lighting.

Claims (4)

1. a kind of lighting device based on LED visible light communication, it is characterised in that the lighting device includes：LED illumination lamp (1), driving power (2), optical communication transmission end (3), optic communication receiving terminal (4) and intelligent controller (5)；Wherein driving power (2) power output end connects LED illumination lamp (1) driving LED illumination lamp (1), and intelligent controller (5) is with RS485 interfaces And WIFI interface, pass through signal between RS485 realizations optical communication transmission end (3), optic communication receiving terminal (4) and intelligent controller (5) Transmission, realize mutual connection by WIFI, form an entirety.

2. the lighting device according to claim 1 based on LED visible light communication, it is characterised in that the driving power (2) band PWM dimming functions, EMI filter circuit, rectification circuit including sequential series connection, active power factor correction APFC Circuit, isolating transformer, output driving circuit, PWM light adjusting circuits, driving LED illumination lamp (1).

3. the lighting device according to claim 1 based on LED visible light communication, it is characterised in that the optic communication hair Penetrate USB interface, USB-UART bridge circuits, C8051 control circuits, low-pass filter circuit that end (3) is connected including sequential series.

4. the lighting device according to claim 1 based on LED visible light communication, it is characterised in that the optic communication connects Signal conditioning circuit that receiving end (4) is connected comprising sequential series, C8051 control circuits, USB-UART bridge circuits, USB interface.