A kind of special CCD optic communication air cleaner of basementTechnical field
The present invention relates to the basement communications field, the special CCD optic communication air cleaner of especially a kind of basement.
Background technology
Solar energy（solar energy）, refer to the infrared radiant energy of the sun（The three kinds of modes propagated referring to heat energy）, mainlyPerformance is exactly the sunray often said.The modern times be typically used as generate electricity or for water heater provide the energy.From life on earth birthSince life, the just main infrared radiant energy existence being provided with the sun, and also understand with sun dry part from ancient human, and as systemThe method making food, such as salt manufacturing and solarization cured fish etc..In the case that Fossil fuel reduces increasingly, solar energy has become the mankind and has usedThe important component part of the energy, and be constantly developed.Solar energy using having photothermal deformation and opto-electronic conversion two ways, tooIt is a kind of emerging regenerative resource that sun can generate electricity.Sensu lato solar energy also includes tellurian wind energy, chemical energy, water energyDeng.
Solar energy is occurred hydrogen helium fusion to discharge huge nuclear energy and produced by solar interior hydrogen atom, from the sunEmittance.
The overwhelming majority of necessary for human energy is all directly or indirectly from the sun.Plant discharges oxygen by photosynthesisGas, absorbing carbon dioxide, and solar energy is transformed into chemical energy stores in plant body.Coal, oil, natural gas etc. are changedStone fuel is also the primary energy being formed through very long geological epoch differentiation by the animals and plants that ancient times are embedded in underground.The earth itselfThe energy contained is often referred to the energy relevant with the heat energy of earth interior and the energy relevant with nuclear reaction.
Development with white light LEDs device is it is seen that optical communication technique has obtained increasing attention.Visible ray is wirelessCommunication system is mainly made up of optical signal launch end and optical signal receiving terminal.This Technology application is to structure basement wireless networkWhat road communicated has huge superiority, and basement wireless sensor network is by multiple low costs, low-power consumption, multi-functional collectionOne-tenthization microsensor node forms, and these sensor nodes constitute wireless network, have data acquisition, radio communication and informationThe ability processing, by multiple sensors with auxiliary electrode inserting knot in a specific region, can form wireless sensor network, itBy specific agreement, efficiently, stable, accurately carry out self-organizing, and surveyed in real time by each sensor node cooperationAmount, perception and the information gathering various ocean essentials, using wireless communication technology by observation information real-time Transmission.
Content of the invention
The goal of the invention of the present invention is to overcome the shortcomings of art methods, there is provided a kind of low-power consumption, small volume, lowCost, has the housed device based on visible light communication of computing capability and communication capacity.
For achieving the above object it is proposed that following technical scheme：
A kind of special CCD optic communication air cleaner of basement, including central processing unit, field programmable gate array,Processor module, reception antenna, photo-detector, signal processing circuit, power circuit, air cleaner, LED send/receiveModule, sensor assembly, serial communication modular, power module, power circuit, optical key module；Described central processing unit connectsOptical key module, reception antenna, photo-detector, signal processing circuit, power circuit, air cleaner；
Described air cleaner includes microcontroller, humidifier switch and Optical Receivers, and described Optical Receivers is from skyReceive LED communication signal in air purifying apparatus group, obtain control instruction to after described LED communication signal processing, and by described controlInstruction processed is transported to microcontroller, and described microcontroller generates the execute instruction of humidifier switch, institute according to described control instructionStating humidifier switch is electromagnetic relay, and described electromagnetic relay is connected with the damping device of humidifier；
Described air cleaner also include level sensor, temperature sensor, humidity collection sensor, audible-visual annunciator andDisplay circuit, when described Intelligent purifying device is started working according to control instruction, microcontroller is to described level sensor, temperatureSensor, humidity collection sensor send execute instruction, obtain water yield data signal in humidifier, room-temperature signal and interiorMoisture signal, microprocessor is amplified, measures to described water yield data signal, room-temperature signal and indoor humidity signal, A/DIncluding UV air depurator, using ultraviolet light, the antibacterial of in the air and harmful substance are killed, be air purifierExecution unit；Sensor data acquisition module, for being acquired to external signal and processing, including motion sensor and changeLearn sensor；Power circuit block, carries out blood pressure lowering to daily electric main, provides correspondingly work for air purifier all partsMake voltage；AC Motor Control module, single-chip microcomputer drives optocoupler motor by controllable silicon, controls the change of its conducting and rotating speedChange, signal that single-chip microcomputer provides according to sensor, manual key signal carry out tune automatically and manually to the working condition of motorWhole so that when air purifier operates under different mode of operations, motor is in the rotating speed of corresponding shelves；Uviol lamp management and controlMolding block, optocoupler is driven by controllable silicon by single-chip microcomputer, drives ultraviolet lamp tube, and the working condition feedback letter according to fluorescent tubeNumber, judge fluorescent tube whether normal work；Infrared remote control module includes infrared transmitter and receiving circuit, arranges each button and sends outThe infrared waveform penetrated and sequential；Described display control module and key control module are used for air purifier mode of operationOperation and display；Described Optical Receivers, for receiving the LED communication signal of LED light group transmitting, and is converted to control instruction；Including UV air depurator, using ultraviolet light, the antibacterial of in the air and harmful substance are killed, be air purifierExecution unit；Sensor data acquisition module, for being acquired to external signal and processing, including motion sensor and changeLearn sensor；Power circuit block, carries out blood pressure lowering to daily electric main, provides correspondingly work for air purifier all partsMake voltage；AC Motor Control module, single-chip microcomputer drives optocoupler motor by controllable silicon, controls the change of its conducting and rotating speedChange, signal that single-chip microcomputer provides according to sensor, manual key signal carry out tune automatically and manually to the working condition of motorWhole so that when air purifier operates under different mode of operations, motor is in the rotating speed of corresponding shelves；Uviol lamp management and controlMolding block, optocoupler is driven by controllable silicon by single-chip microcomputer, drives ultraviolet lamp tube, and the working condition feedback letter according to fluorescent tubeNumber, judge fluorescent tube whether normal work；Infrared remote control module includes infrared transmitter and receiving circuit, arranges each button and sends outThe infrared waveform penetrated and sequential；Described display control module and key control module are used for air purifier mode of operationOperation and display；Described Optical Receivers, for receiving the LED communication signal of LED light group transmitting, and is converted to control instruction.
Described remote visible light communication system equipment mainly includes transmitting terminal and receiving terminal；Transmitting terminal can using OOK,The modulation systems such as PPM, the optical signal modulating is launched by light source with the rule of high speed, light and shade change, using high-power lowBeam divergence angle array LED, as light source, because modulation rate is in 100 bit magnitudes, can coordinate C++ software using single-chip microcomputerProgramming carries out the design of hardware and software of transmitting terminal, realizes the transmission of character string；Receiving terminal, using CCD as photo-detector, hardwareEquipment uses high more than frame frequency 100fps, high sensitivity, high-responsivity CCD camera；Camera is carried out with frame frequency identical with light sourceShoot, and design software carries out collection and the process of data to CCD camera, the rule of modulated signal is presented, obtainsCorresponding gray value, thus completing the transmittance process of information, realizes the reception of character string；Described charging socket is arranged at door closeSide；
Described central processing unit connects optical key module, signal modulation control device, LED, reception antenna, photo-detector, letterNumber process circuit；Described signal modulation equipment is responsible for modulating the original signal of telecommunication of generation；Described LED lamp is monochromatic LED；InstituteStating photo-detector is that visible light wave range responds preferable CCD electrooptical device；Described reception antenna is the optics of variable multipleCamera lens；Described signal processing circuit is adapted with photo-detector, for the process of video electrical signal, and determines light spot receivedShape, size and average received power；It is atmospheric channel between described searchlight and described reception antenna, the light that light source sendsIt is transmitted by atmospheric channel；
It is provided with intelligent mobile terminal, based on intelligent mobile terminal operating system, design is based on virtual in described optical key moduleThe key of serial ports sends the software module of intelligent mobile terminal, sends out key letter by the software module of intelligent mobile terminalBreath, key information is exported by the min-USB mouth of intelligent mobile terminal；The key information being exported, based on intelligent mobile terminalOTG function, in external drive module loading to air cleaner, completes the transmission of key information by LED；InstituteState power circuit and connect central processing unit and field programmable gate array respectively；It is provided with solar energy in described power circuitCell panel, mu balanced circuit, power-supply controller of electric and DC power-supply circuit；Described processor module controls LED light source to send and receiveInformation, and coordinate each peripheral unit work；Communication between described LED transmission/reception module responsible node；Described sensor dieBlock is responsible for the collection of target area information；Described serial communication modular is connected with computer, realizes the transmitting-receiving of data；Described power supplyThe energy supply of module responsible node.
Described field programmable gate array, internal inclusion configurable logic blocks CLB, input/output module IOBWith three parts of interconnector；FPGA utilizes small-sized look-up table（16×1RAM）To realize combination logic, each look-up table connectsTo the input of a d type flip flop, trigger to drive other logic circuits again or to drive I/O, thus constitutes and both can achieveCombination logic function can achieve the basic logic unit module of sequential logic function again, and these intermodules utilize metal connecting line mutualIt is coupled or attached to I/O module；The logic of FPGA loads programming data by internally static storage cell and realizes, and depositsStorage value in a memory cell determines coupling between the logic function of logical block and each module or between module and I/OMode, and finally determine the function achieved by FPGA, FPGA allows unlimited number of programming.
Described processor module adopts the master as communication node for the STM32F405RGT6 embedded microprocessor of low-power consumptionControl chip, this chip volume is little, light weight, and computing capability can meet system requirements, and internal resource enriches simultaneously, is integrated withThe functions such as USART, GPIO and ADC, so processor module only needs to chip piece and simple peripheral circuit thus realizingThe requirement of small volume, light weight and computing capability.
Key to be sent is TTL level signal, and that is,+5V represents high level " 1 ", and 0V represents low level " 0 "；DescribedLED drive module includes PNP type paster audion S8550 and its related peripheral device, is used for realizing the signal of telecommunication to optical signalConversion；The device of described one one-to-many of optical key module；Optical key is based on single-chip microcomputer STC12C2052AD designA kind of transmitting terminal.
In described LED transmission/reception module, the light source of selection is the high-power blue light source of Luxeon III Enutter(3W).The feature of this light source is mainly：Luminous flux is high；Service life is up to 5*104h；Small volume；Rated operational current is very big,It is about 350 ~ 700mA；Lighting time is less than 100s.In addition, light source and aluminium base are applied in combination to radiate by this module,Realize optically focused using Fresnel Lenses.From ULN2803A as LED driving chip, ULN2803A is that high-voltage great-current reachesIslington transistor array circuit, this circuit is reverse output type, i.e. input low level voltage, and outfan turns on.This chip is permissibleSimultaneously drive 8 groups of loaded work pieces, have current gain height, temperature range width, carrying load ability strong the features such as, be highly suitable asThe driving of LED light source.The optical signal of acceptance is converted into the signal of telecommunication by described visible Optical Receivers, and gathered data is provided to placeReason device.Consider miniaturization principle, so using blue light enhancement photodiode PIN-10DP/SB as receiving element, this yuanPart has 100m2Above photosensitive area, for the wavelength of 400 ~ 600m（Blue green light wavelength band）More sensitive, under domesticThe receptor of water node.
Described serial communication modular be directed to Sink node, using the serial communication port USART-Tx on main control chip,USART-Rx, output Transistor-Transistor Logic level realizes the transmitting-receiving of data.The energy supply of power module responsible node, Sink node is passed throughSerial ports is connected with computer terminal, and it is unlimited that energy may be considered, and ordinary node then needs to power by battery.
It is power supply that described power module adopts the STM32F405RGT6 that voltage range is 1.8V ~ 3.6V, saves No. five using 2Battery is powering, and is voltage stabilizing chip using the LT1963EST-3.3 of low noise, fast transient response.LT1963EST-3.3 is steadyThe output current of pressure chip is 3.3V in 1.5V, output voltage, has the features such as low noise, fast transient response.
This beneficial effect of the invention：
The methods and techniques such as application artificial taste intelligent system, knowledge engineering, pattern recognition, artificial neural network, carry out intelligenceChange, the computer management system of integrated, concert rationality, design and realization a new generation.Using ultraviolet, room air is carried outSterilization and the product sterilized, using the Integrated design of motion sensor and two sensor data acquisition modules of chemical sensor,This air purifier is made to have the function of automatic data collection and adjust automatically working condition it is achieved that the intellectuality of product, energy-conservationProperty with the feature of environmental protection.In addition the combination of remote control technology and visible light communication technology is it is achieved that remote to air purifierJourney setting and open and close so that air purifier achieves long-distance intelligent control, and is combined with illuminator it is achieved that nothingLine communicates, and obtains attractive in appearance, succinct Consumer's Experience.
In addition, air cleaner can achieve remotely control by gsm communication module, user can be before going homeStart air cleaner, improve indoor air humidity, close after being away from home, even if it is net to close air before forgetting to go outGasifying device, it is also possible to send control instruction by mobile phone, closes air cleaner, and air cleaning of so can making rational planning for fillsThe use time put, postpones service life and energy saving., easily by electromagnetic interference, the direction of transmission is uncontrollable, close for WIFICode is easily trapped.But visible light communication is a kind of point-to-point transmission mode, has the advantages that good confidentiality.Described humidityCollection sensor is SHT21 sensor, is not now needing temperature sensor；This sensor can be to the temperature and humidity of environmentIt is monitored, humidity precision ± 2% (relative humidity 20%～80%), temperature accuracy ± 0.3 DEG C (25～42 DEG C of ambient temperature).PassSensor, through demarcating, had both been provided that I2C digital interface, had also been provided that PWM simulation output pattern.Because digital communication can be dropped significantlyLow-power consumption, in normal operation, power consumption can be within 3 μ W, and in the case of extending measurement interval, power consumption also can be furtherReduce.During SHT21, A/D circuit is digitized signal conversion.In addition, the resolution of SHT21 also may be usedTo carry out the change of 8/12bit to 12/14bit by instruction, be easy to detect state of charge, simultaneously output verification with contribute toImprove the reliability of communication.
Described microcontroller is to adopt single-chip microcomputer, and its CPU was made up of controller and arithmetical unit, is substantially carried out computing and refers toOrder identification.Memorizer is the erasable flash memory of 8K, and working power is+5V.There are the inverting amplifier of agitator, stone inside itEnglish crystal and ceramic resonator collectively form self-excited oscillator.Pin is simple and reliable, powerful, easy to use, and hasLow power idle and power-down mode.
Described temperature sensor is DS18B20 sensor, and DS18B20 sensor has a line interface, using simple sideJust, in actual use without outer member, directly powered using data/address bus, measurement temperature scope is larger.Therefore, makeWider with scope, purposes is larger.
Optical key and intelligent mobile terminal combine, and can be very good to develop mobile phone A AP light key with android systemSoftware, android system is the operating system increased income based on Linux, is mainly used in mobile terminal（Mobile phone andFlat board）In.Android system is compared with other system platforms, has very big advantage.Its advantage is topmost to be embodied in itOpening.Android system is the system increased income completely, and all of fan and manufacturer can participate in AndroidThe exploitation of system, this has just laid fine basis for the development of Android system.Android system has become asThe big system of global installation amount first.Another big advantage of Android system is namely based on the platform of Google, and Google is publicThe map of department, search, the service product such as mailbox, can be seamless be applied in Andriod system.
Described field programmable gate array, internal inclusion configurable logic blocks CLB, input/output module IOBWith three parts of interconnector；FPGA utilizes small-sized look-up table（16×1RAM）To realize combination logic, each look-up table connectsTo the input of a d type flip flop, trigger to drive other logic circuits again or to drive I/O, thus constitutes and both can achieveCombination logic function can achieve the basic logic unit module of sequential logic function again, and these intermodules utilize metal connecting line mutualIt is coupled or attached to I/O module；The logic of FPGA loads programming data by internally static storage cell and realizes, and depositsStorage value in a memory cell determines coupling between the logic function of logical block and each module or between module and I/OMode, and finally determine the function achieved by FPGA, FPGA allows unlimited number of programming；To better implement the present invention,Disclosure satisfy that and not make solar energy be generated electricity or still meet when night whole system is powered in illuminance
When using, unnecessary electric energy will be stored in accumulator battery, and occur solar illuminating not or rainy weather orDuring night, accumulator battery will carry out releasing electricity, and is delivered in DC power-supply circuit by the output circuit of power-supply controller of electric, centeringCentral processor and field programmable gate array are powered, reach 24 hours round-the-clock make whole system work.ThisDescribed in bright, STM32F405RGT6 embedded microprocessor is adopted as communication section based on water node under the domestic of visible light communicationThe main control chip of point, this chip volume is little, light weight, and computing capability can meet system requirements, and internal resource enriches simultaneously, integratedUSART, the function such as GPIO and ADC, so processor module only needs to chip piece and simple peripheral circuit thus realityThe requirement of existing small volume, light weight and computing capability.Compare it is seen that water under the domestic of optic communication with traditional water sound communication techniqueNode possesses low-power consumption, small volume, low cost, has computing capability and communication capacity, and practicality is extensive, and economic benefitHeight, has huge market prospect.
Remote visible light communication system, employs OOK modulation system in transmitting terminal, OOK bandwidth demand is low, and firmlyPart is realized the most simply, only needing to the method by direct detection, receive by judging that the presence or absence of light to determine when decodingInformation when 0 or 1；Make transmitting terminal cost reasonable；In receiving terminal, using CCD as photo-detector, hardware device usesHigh frame frequency（More than 100fps）, high sensitivity, high-responsivity CCD camera；Camera is shot with frame frequency identical with light source,And design software carries out collection and the process of data to CCD camera, and the rule of modulated signal is presented, obtain correspondingGray value, thus completing the transmittance process of information, realize the reception of character string.Select CCD as photo-detector, it is sensitiveDegree and responsiveness are more much higher than traditional PIN photodiode.In contrast to conventional photodiode, can using CCD cameraSo that the position of light source can clearly indicate out in the picture, so, as long as can interpolate that out the position of signal, in the future may be usedTo use multiple light sources, within the ability to accept of receiving terminal, increase exponentially transfer rate.And CCD is as optical detectionDevice can also be simultaneously used in the middle of APT communication system.
Using under the domestic based on visible light communication water node constitute wireless network, have data acquisition, radio communication andThe ability of information processing, by multiple such inserting knot in a specific region, can form wireless network, and they pass through spyFixed agreement, efficiently, stablizes, accurately carries out self-organizing, and is measured, perceives and gathered each in real time by each node cooperationThe information of kind of ocean essential, using wireless communication technology by observation information real-time Transmission.
Brief description
Fig. 1 is based on water node structure figure under the domestic of visible light communication；
Fig. 2 is processor module circuit diagram；
Fig. 3 is LED driver circuit figure；
Fig. 4 is visible Optical Receivers circuit diagram；
Fig. 5 is power module circuitry figure.
Specific embodiment
Below in conjunction with the accompanying drawings a kind of basement special CCD optic communication air cleaner of the present invention is made detailed furtherDescribe to the greatest extent：
1, as shown in figure 1, a kind of basement special CCD optic communication air cleaner, can compile including central processing unit, sceneJourney gate-array circuit, processor module, reception antenna, photo-detector, signal processing circuit, power circuit, air cleaner,LED transmission/reception module, sensor assembly, serial communication modular, power module, power circuit, optical key module；In describedCentral processor connects optical key module, reception antenna, photo-detector, signal processing circuit, power circuit, air cleaner；
Described air cleaner includes microcontroller, humidifier switch and Optical Receivers, and described Optical Receivers is from skyReceive LED communication signal in air purifying apparatus group, obtain control instruction to after described LED communication signal processing, and by described controlInstruction processed is transported to microcontroller, and described microcontroller generates the execute instruction of humidifier switch, institute according to described control instructionStating humidifier switch is electromagnetic relay, and described electromagnetic relay is connected with the damping device of humidifier；
Described air cleaner also include level sensor, temperature sensor, humidity collection sensor, audible-visual annunciator andDisplay circuit, when described Intelligent purifying device is started working according to control instruction, microcontroller is to described level sensor, temperatureSensor, humidity collection sensor send execute instruction, obtain water yield data signal in humidifier, room-temperature signal and interiorMoisture signal, microprocessor is amplified, measures to described water yield data signal, room-temperature signal and indoor humidity signal, A/DIncluding UV air depurator, using ultraviolet light, the antibacterial of in the air and harmful substance are killed, be air purifierExecution unit；Sensor data acquisition module, for being acquired to external signal and processing, including motion sensor and changeLearn sensor；Power circuit block, carries out blood pressure lowering to daily electric main, provides correspondingly work for air purifier all partsMake voltage；AC Motor Control module, single-chip microcomputer drives optocoupler motor by controllable silicon, controls the change of its conducting and rotating speedChange, signal that single-chip microcomputer provides according to sensor, manual key signal carry out tune automatically and manually to the working condition of motorWhole so that when air purifier operates under different mode of operations, motor is in the rotating speed of corresponding shelves；Uviol lamp management and controlMolding block, optocoupler is driven by controllable silicon by single-chip microcomputer, drives ultraviolet lamp tube, and the working condition feedback letter according to fluorescent tubeNumber, judge fluorescent tube whether normal work；Infrared remote control module includes infrared transmitter and receiving circuit, arranges each button and sends outThe infrared waveform penetrated and sequential；Described display control module and key control module are used for air purifier mode of operationOperation and display；Described Optical Receivers, for receiving the LED communication signal of LED light group transmitting, and is converted to control instruction；Including UV air depurator, using ultraviolet light, the antibacterial of in the air and harmful substance are killed, be air purifierExecution unit；Sensor data acquisition module, for being acquired to external signal and processing, including motion sensor and changeLearn sensor；Power circuit block, carries out blood pressure lowering to daily electric main, provides correspondingly work for air purifier all partsMake voltage；AC Motor Control module, single-chip microcomputer drives optocoupler motor by controllable silicon, controls the change of its conducting and rotating speedChange, signal that single-chip microcomputer provides according to sensor, manual key signal carry out tune automatically and manually to the working condition of motorWhole so that when air purifier operates under different mode of operations, motor is in the rotating speed of corresponding shelves；Uviol lamp management and controlMolding block, optocoupler is driven by controllable silicon by single-chip microcomputer, drives ultraviolet lamp tube, and the working condition feedback letter according to fluorescent tubeNumber, judge fluorescent tube whether normal work；Infrared remote control module includes infrared transmitter and receiving circuit, arranges each button and sends outThe infrared waveform penetrated and sequential；Described display control module and key control module are used for air purifier mode of operationOperation and display；Described Optical Receivers, for receiving the LED communication signal of LED light group transmitting, and is converted to control instruction.
Described remote visible light communication system equipment mainly includes transmitting terminal and receiving terminal；Transmitting terminal can using OOK,The modulation systems such as PPM, the optical signal modulating is launched by light source with the rule of high speed, light and shade change, using high-power lowBeam divergence angle array LED, as light source, because modulation rate is in 100 bit magnitudes, can coordinate C++ software using single-chip microcomputerProgramming carries out the design of hardware and software of transmitting terminal, realizes the transmission of character string；Receiving terminal, using CCD as photo-detector, hardwareEquipment uses high more than frame frequency 100fps, high sensitivity, high-responsivity CCD camera；Camera is carried out with frame frequency identical with light sourceShoot, and design software carries out collection and the process of data to CCD camera, the rule of modulated signal is presented, obtainsCorresponding gray value, thus completing the transmittance process of information, realizes the reception of character string；Described charging socket is arranged at door closeSide；
Described central processing unit connects optical key module, signal modulation control device, LED, reception antenna, photo-detector, letterNumber process circuit；Described signal modulation equipment is responsible for modulating the original signal of telecommunication of generation；Described LED lamp is monochromatic LED；InstituteStating photo-detector is that visible light wave range responds preferable CCD electrooptical device；Described reception antenna is the optics of variable multipleCamera lens；Described signal processing circuit is adapted with photo-detector, for the process of video electrical signal, and determines light spot receivedShape, size and average received power；It is atmospheric channel between described searchlight and described reception antenna, the light that light source sendsIt is transmitted by atmospheric channel；
It is provided with intelligent mobile terminal, based on intelligent mobile terminal operating system, design is based on virtual in described optical key moduleThe key of serial ports sends the software module of intelligent mobile terminal, sends out key letter by the software module of intelligent mobile terminalBreath, key information is exported by the min-USB mouth of intelligent mobile terminal；The key information being exported, based on intelligent mobile terminalOTG function, in external drive module loading to air cleaner, completes the transmission of key information by LED；InstituteState power circuit and connect central processing unit and field programmable gate array respectively；It is provided with solar energy in described power circuitCell panel, mu balanced circuit, power-supply controller of electric and DC power-supply circuit；Described processor module controls LED light source to send and receiveInformation, and coordinate each peripheral unit work；Communication between described LED transmission/reception module responsible node；Described sensor dieBlock is responsible for the collection of target area information；Described serial communication modular is connected with computer, realizes the transmitting-receiving of data；Described power supplyThe energy supply of module responsible node.
Described field programmable gate array, internal includes configurable logic blocks CLB, input/output module IOB and interiorThree parts of portion's line；FPGA utilizes small-sized look-up table（16×1RAM）To realize combination logic, each look-up table is connected to oneThe input of individual d type flip flop, trigger to drive other logic circuits again or to drive I/O, thus constitutes and both can achieve combinationLogic function can achieve the basic logic unit module of sequential logic function again, and these intermodules utilize metal connecting line to interconnectOr it is connected to I/O module；The logic of FPGA loads programming data by internally static storage cell and realizes, and is stored inValue in memory cell determines the side of connection between the logic function of logical block and each module or between module and I/OFormula, and finally determine the function achieved by FPGA, FPGA allows unlimited number of programming；To better implement the present invention, energyEnough meet not make solar energy be generated electricity or still meet when night whole system is powered in illuminance.
Key to be sent is TTL level signal, and that is,+5V represents high level " 1 ", and 0V represents low level " 0 "；DescribedLED drive module includes PNP type paster audion S8550 and its related peripheral device, is used for realizing the signal of telecommunication to optical signalConversion；The device of described one one-to-many of optical key module；Optical key is based on single-chip microcomputer STC12C2052AD designA kind of transmitting terminal.
When using, unnecessary electric energy will be stored in accumulator battery, and it is inadequate or overcast and rainy solar illuminatingWhen gas or night, accumulator battery will carry out releasing electricity, and is delivered in DC power-supply circuit by the output circuit of power-supply controller of electric,Central processing unit and field programmable gate array are powered, reach 24 hours round-the-clock make whole system work.
Described humidity collection sensor is SHT21 sensor, is not now needing temperature sensor；This sensor can be rightThe temperature and humidity of environment is monitored, humidity precision ± 2% (relative humidity 20%～80%), temperature accuracy ± 0.3 DEG C (environment25～42 DEG C of temperature).Sensor, through demarcating, had both been provided that I2C digital interface, had also been provided that PWM simulation output pattern.BecauseDigital communication can substantially reduce power consumption, and in normal operation, power consumption can be within 3 μ W, in the situation extending measurement intervalUnder, power consumption also can reduce further.During SHT21, A/D circuit is digitized signal conversion.In addition,The resolution of SHT21 can also carry out the change of 8/12bit to 12/14bit by instruction, is easy to detect state of charge, simultaneouslyOutput verification and, be favorably improved the reliability of communication.
Described microcontroller is to adopt single-chip microcomputer, and its CPU was made up of controller and arithmetical unit, is substantially carried out computing and refers toOrder identification.Memorizer is the erasable flash memory of 8K, and working power is+5V.There are the inverting amplifier of agitator, stone inside itEnglish crystal and ceramic resonator collectively form self-excited oscillator.Pin is simple and reliable, powerful, easy to use, and hasLow power idle and power-down mode.
Described temperature sensor is DS18B20 sensor, and DS18B20 sensor has a line interface, using simple sideJust, in actual use without outer member, directly powered using data/address bus, measurement temperature scope is larger.Therefore, makeWider with scope, purposes is larger.
Described remote visible light communication system specifically includes：
Manipulator, needs modulates baseband signals to light carrier for visible light communication transmitting terminal, the effect of manipulator is exactlyWill be according to different modulation systems, such as OOK modulation, PPM modulation etc., information is first modulated into the signal of telecommunication.On manipulator hardwareIn order to reach the requirement of higher speed and precision, can also select FPGA using 51 conventional single-chip microcomputer seriesDeng.
LED drives, and is used for converting electrical signals to optical signal.LED drive module is used for completing the drive to LED light sourceThe signal of telecommunication being adjusted to is converted into optical signal simultaneously and is loaded on LED light source by dynamic function.As 51 single-chip microcomputers, its triggeringMode is TTL triggering, completes LED light source is driven.
LED, is the discharger of visible light communication system, in order to meet the demand of communication system, should select work(as far as possibleRate is big, beam divergence angle is little, white light LEDs light source.Additionally, selecting array format LED light source can increase luminous power, and to beam spreadingAngle commonly reaches 4 degree.
LED controller, for controlling the equipment of light source and camera, completes miscellaneous function.
Atmospheric channel, the flashlight being adjusted to is launched by light source, is transmitted by atmospheric channel, will be subject in transmitting procedureImpact to atmospheric channel.
Camera lens, camera lens are reception antenna, mainly complete the seizure receive capabilities of optical signal, and camera lens can enterRow zoom, changes field of view of receiver angle, can zoom in or out target.For the ease of cooperating with CCD camera, it is configured withMotorized zoom lenses and encoder, it is possible to achieve computer controls autozoom.
CCD camera, CCD is sensitive component, mainly converts optical signal into signal of telecommunication reimaging.
CCD camera needs to mate the speed of light source, and CCD camera can complete high frame frequency collection.CCD camera passes throughGigabit Ethernet is connected on computer, and completes collection and the process of view data by program.
Imaging process, for carrying out receiving imaging the modulated optical signal receiving, analyzes its gray scale light intensity, solutionRecall raw information, the information that completes receives.
As shown in Fig. 2 described processor module adopts the STM32F405RGT6 embedded microprocessor of low-power consumption as logicalThe main control chip of letter node, this chip volume is little, light weight, and computing capability can meet system requirements, and internal resource enriches simultaneously,Be integrated with USART, the function such as GPIO and ADC, so processor module only need to chip piece and simple peripheral circuit fromAnd realize the requirement of small volume, light weight and computing capability.
As shown in figure 3, in described LED transmission/reception module, the light source of selection is that Luxeon III Enutter is high-powerBlue light source (3W).The feature of this light source is mainly：Luminous flux is high；Service life is up to 5*104h；Small volume；Nominal operation electricityStream is very big, about 350 ~ 700mA；Lighting time is less than 100s.In addition, light source and aluminium base are applied in combination use by this moduleTo radiate, realize optically focused using Fresnel Lenses.From ULN2803A as LED driving chip, ULN2803A is high pressureHigh current darlington transistor array circuit, this circuit is reverse output type, i.e. input low level voltage, and outfan turns on.ShouldChip can simultaneously drive 8 groups of loaded work pieces, have current gain height, temperature range width, carrying load ability strong the features such as, veryIt is suitable as the driving of LED light source.
As shown in figure 4, the optical signal of acceptance is converted into the signal of telecommunication by described visible Optical Receivers, gathered data is carriedIt is supplied to processor.Consider miniaturization principle, thus first as receiving using blue light enhancement photodiode PIN-10DP/SBPart, this element has 100m2Above photosensitive area, for the wavelength of 400 ~ 600m（Blue green light wavelength band）More sensitive, useThe receptor of water node under domestic.
As shown in figure 5, it is power supply that described power module adopts the STM32F405RGT6 that voltage range is 1.8V ~ 3.6V, adoptPowered with 2 section No.5 cells, and be voltage stabilizing chip using the LT1963EST-3.3 of low noise, fast transient response.The output current of LT1963EST-3.3 voltage stabilizing chip is 3.3V in 1.5V, output voltage, has low noise, fast transient responseThe features such as.
Above in conjunction with accompanying drawing, embodiments of the invention are described, but the invention is not limited in above-mentioned concreteEmbodiment, above-mentioned specific embodiment is only schematically, rather than restricted, those of ordinary skill in the artUnder the enlightenment of the present invention, in the case of without departing from present inventive concept and scope of the claimed protection, also can make a lotForm, these belong within the protection of the present invention.