CN106168095A - A kind of photovoltaic phonetic warning automatically controls window - Google Patents
A kind of photovoltaic phonetic warning automatically controls window Download PDFInfo
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- CN106168095A CN106168095A CN201610440949.2A CN201610440949A CN106168095A CN 106168095 A CN106168095 A CN 106168095A CN 201610440949 A CN201610440949 A CN 201610440949A CN 106168095 A CN106168095 A CN 106168095A
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Classifications
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F15/00—Power-operated mechanisms for wings
- E05F15/70—Power-operated mechanisms for wings with automatic actuation
- E05F15/77—Power-operated mechanisms for wings with automatic actuation using wireless control
- E05F15/78—Power-operated mechanisms for wings with automatic actuation using wireless control using light beams
-
- 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
Abstract
The invention discloses a kind of photovoltaic phonetic warning and automatically control window, including reception antenna, signal processing circuit, power circuit, white light LEDs；Described automatic window is single-chip microcomputer, carries out collection and the compressed encoding of speech data for controlling described audio coder-decoder, and by serial ports, collection data are sent to LED drive circuit, and described LED drive circuit sends make-and-break signal according to instruction；Photoelectric Detection module controls described PD photosensitive tube and receives optical signal and be transported to described automatic window, and the data of reception are sent to described audio coder-decoder and are decoded output by described automatic window.This system implementation complexity and low cost, communication distance far, can take into account illumination and real-time voice intercommunication, and simultaneity factor can also transmit other data in addition to voice.
Description
Technical field
The present invention relates to technical field of photo communication, especially a kind of photovoltaic phonetic warning automatically controls window.
Background technology
Solar energy (solar energy), refers to the infrared radiant energy (seeing three kinds of modes that heat energy is propagated) of the sun, mainly
Performance is exactly the sunray often said.It is typically used as generating in the modern times or provides the energy for water heater.From life on earth birth
Since life, the infrared radiant energy existence mainly provided with the sun, and also understand with sun dry part from ancient human, and as system
The method making food, such as salt manufacturing and solarization cured fish etc..In the case of Fossil fuel reduces increasingly, solar energy has become the mankind and has used
The important component part of the energy, and be constantly developed.The utilization of solar energy has photothermal deformation and opto-electronic conversion two ways, too
It is a kind of emerging regenerative resource that sun can generate electricity.Sensu lato solar energy also includes tellurian wind energy, chemical energy, water energy
Deng.
Solar energy is discharged huge nuclear energy by solar interior hydrogen atom generation hydrogen helium fusion and produces, from the sun
Emittance.
The overwhelming majority of necessary for human energy is all directly or indirectly from the sun.Plant discharges oxygen by photosynthesis
Gas, absorbing carbon dioxide, and solar energy is transformed into chemical energy stores in plant.Coal, oil, natural gas etc. are changed
Stone fuel is also to be developed, by the animals and plants being embedded in underground ancient times, the primary energy formed through very long geological epoch.The earth itself
The energy contained is often referred to the energy relevant with the heat energy of earth interior and the energy relevant with nuclear reaction.
In the middle of existing wireless technology, remove conventional radio frequency based on electromagnetic transmission information communication outside, also have based on
The radio communication of light, wherein, has communication technology based on iraser etc., also has wireless communication technology based on visible ray.Can
See optical communication technique, be that the naked eyes imperceptible high speed light and shade flash signal utilizing luminous diode to send is to transmit information
's.The data needing transmission are loaded on optical carrier, and are modulated, then utilize electrooptical device to receive light and carry
Ripple signal also demodulates to obtain information.Visible light communication system can cover the scope that light can reach, it is not necessary to electric wire is even
Connect.Optical communication technique has great development prospect, will provide a kind of brand-new high-speed data access way for optic communication.
Summary of the invention
The goal of the invention of the present invention is, overcomes the deficiency of art methods, it is provided that a kind of implementation complexity and cost
Low, communication distance is remote, can take into account the system of illumination and real-time voice intercommunication, and simultaneity factor can also be transmitted in addition to voice
Other data.
For achieving the above object, it is proposed that following technical scheme:
A kind of photovoltaic phonetic warning automatically controls window, including；Central processing unit, field programmable gate array, light electric-examination
Slowdown monitoring circuit, light-dependent control lock module, optical key module, reception antenna, signal processing circuit, power circuit, white light LEDs, visible ray pass
Transmission link, automatic window, audio coder-decoder, audio frequency input/output terminal, power circuit；
Described signal modulating equipment is responsible for modulation and is generated the original signal of telecommunication；Described LED lamp is monochromatic LED；Described light is visited
Surveying device is that visible light wave range responds preferable CCD electrooptical device；Described reception antenna is the optical lens of variable multiple；
Described signal processing circuit adapts with photo-detector, for the process of video electrical signal, and determine light spot received shape,
Size and average received power；Being atmospheric channel between described searchlight and described reception antenna, the light that light source sends passes through
Atmospheric channel is transmitted；
Described remote visible light communication system equipment mainly includes transmitting terminal and receiving terminal；Transmitting terminal can use OOK, PPM etc.
Modulation system, the optical signal modulated is launched with the rule of high speed, light and shade change, is used high-power low beam divergence angle by light source
Array LED is as light source, owing to modulation rate is in 100 bit magnitudes, single-chip microcomputer can be used to coordinate C++ software programming to enter
The design of hardware and software of row transmitting terminal, it is achieved the transmission of character string；Receiving terminal, uses CCD to make as photo-detector, hardware device
With high more than frame frequency 100fps, high sensitivity, high-responsivity CCD camera；Camera shoots with frame frequency identical with light source,
And design software carries out collection and the process of data to CCD camera, the rule of modulated signal is presented, obtain corresponding
Gray value, thus complete the transmittance process of information, it is achieved the reception of character string；Described charging socket is arranged at the side of door close
End；
Solar panel, mu balanced circuit, power-supply controller of electric and DC power-supply circuit it is provided with in stating power circuit；In described hands
Central processor connects optical key module；It is provided with intelligent mobile terminal in described optical key module, grasps based on intelligent mobile terminal
Make system, design key based on virtual serial port and send the software module of intelligent mobile terminal, soft by intelligent mobile terminal
Part module sends out key information, and key information is exported by the min-USB mouth of intelligent mobile terminal；The key letter exported
Breath, based on intelligent mobile terminal OTG function, in external drive module loading to LED, completes key by LED and believes
The transmission of breath；Described transmission of visible light link includes LED drive circuit, LED, lens, PD photosensitive tube and Photoelectric Detection module；
Described automatic window is single-chip microcomputer, carries out collection and the compressed encoding of speech data for controlling described audio coder-decoder,
And collection data are sent to LED drive circuit by serial ports, described LED drive circuit sends make-and-break signal according to instruction；
Photoelectric Detection module controls described PD photosensitive tube and receives optical signal and be transported to described automatic window, and described automatic window will receive
Data be sent to described audio coder-decoder be decoded output.
Alternatively, the uplink downlink of described gate inhibition's audio communication system based on optic communication all uses the common white light of 1W
LED, uses on-off keying-nonreturn to zero code (OOK-NRZ) modulation system.
Sent key is that TTL level signal, i.e.+5V represent high level " 1 ", and 0V represents low level " 0 "；Based on
TTL signal level feature, selects low cost, small size PNP type paster audion S8550 and related peripheral device, structure
Become LED drive circuit；Optical key is a kind of transmitting terminal based on single-chip microcomputer STC12C2052AD design；Optical key can be sent out
Sending different keys, described optical key module is not a simple man-to-man device, but the device of an one-to-many.
In described LED drive circuit, the voice data from single-chip microcomputer is amplified and converted to electricity by mutual conductance amplifying circuit
Stream signal, by being loaded in LED after Bias-T superposition direct current.The angle of divergence of LED is generally large, in LED front end
Add apart from adjustable collimating lens, the dispersion angle of light regulating, in order to for different distance illumination with communicate.
Described PD photosensitive tube be receiving area be 5mm × 5mm, PD photosensitive tube.The light of the biggest reception of PD photosensitive tube area
Power is the biggest, but responsive bandwidth can be the least.PD photosensitive tube front end adds the bigger aspheric collimation lens of area and increases reception light merit
Rate.PD photosensitive tube converts optical signals into current signal output, and current visible ray PD photosensitive tube response sensitivity peak value is most
At red spectral band, described PD photosensitive tube sensitivity at LED light spectrum peak 450nm less than 0.3A W.When communication distance farther out
Time, the luminous power that PD photosensitive tube receives is less, and the current signal therefore exported is the least, the most several × 10mA.
Process to carry out follow-up data, need the electric current of PD photosensitive tube output is amplified.
In described Photoelectric Detection module, current signal is converted into voltage signal by the low noise trans-impedance amplifier of the 1st grade, then
After the 2nd step voltage amplifier, voltage amplitude can reach 2～3V, exports the TTL signal of 3.3V after voltage comparator,
It is input to single-chip microcomputer process.
Described audio coder-decoder is the WM8960 audio codec that a low-power consumption, high-fidelity and volume are little, its collection
Become mike, earphone interface and amplifier, therefore greatly reduce quantity and the circuit volume of external circuit components and parts.Mike
The analog audio data of wind input carries out audio coding after the ADC of 24bit samples, and decoded data are through the DAC of 24bit
Rear output is to earphone or speaker.In system, codec transmits voice data by digital interface, by controlling interface
Control data.The sample rate of this encoder could be arranged to 8～48kHz, and the data of left and right sound channels are 16bit, therefore language
The speed of tone signal is 256～1536kbit/s, when traffic rate more than 1536kbit/s time it is ensured that clearly voice pass
Defeated.
Described gate inhibition's audio communication system based on optic communication uses intensity modulated and direct detection (IM/DD), i.e. LED to send out
Penetrate luminous power with transmission signal intensity, the photoelectric detector of receiving terminal, such as photodiode (PD), avalanche diode (APD)
First-class with camera lens, receive the light intensity of power change and change into current signal.Owing to there is direct projection link between sending and receiving end
Time, direct projection link power accounts for the 97.6% of total received power, time after the PD of communication terminal is positioned at LED light source, the most permissible
Ignore the transmitting terminal light interference effect to self receiving terminal.Therefore, uplink downlink all uses white light LEDs to communicate.
This beneficial effect of the invention:
Method and the technology such as application artificial taste intelligent system, knowledge engineering, pattern recognition, artificial neural network, carry out intelligence
Change, integrated, concert rationality, the computer management system of a new generation that designs and realize.Described automatic window includes core processing
Device module, LED light receive circuit, memory module, key-press module, power protection and level switch module, relay module；
Described relay module includes that relay circuit and travel switch, wherein said travel switch are positioned on automatic window track, logical
Cross wire to be connected with the described relay circuit within controller；Core processor realizes power supply by the break-make controlling relay
The selection of wiring point, described relay module includes 2 relays, is just realizing motor by connecting or disconnecting of relay
Turn and reversion, thus realize the opening and closing of window；Described 2 relay circuits normally closed with 2 travel switches the most respectively
Contact series；When window has fully opened or closes, power supply can be disconnected by system automatically, the generation of pre-anticollision, and
Position signalling can be sent to controller by the normally opened contact of travel switch；Described LED light receives circuit and receives LED illumination lamp group
LED communication signal and be converted into control instruction and be transported to core processor；Described power protection includes with level switch module
Power protection part and level converting section, 220 V alternating voltages are turned by described level converting section by daily electric main
It is changed to 5 V direct voltage outputs；Described power protection part is an electric fuse connected with power input；Described button
Module includes a free-standing button, is used for realizing system reboot and recovering initial setting up.WIFI, easily by electromagnetic interference, passes
Defeated direction is uncontrollable, and password is easily trapped.But visible light communication is a kind of point-to-point transmission mode, has confidentiality
Good advantage.Remote visible light communication system, have employed OOK modulation system at transmitting terminal, and OOK bandwidth demand is low, and firmly
Part realizes the simplest, has only to the method by directly detection, determined by the presence or absence judging light and receive when decoding
Information time 0 or 1；Make transmitting terminal cost reasonable；At receiving terminal, CCD is used to use as photo-detector, hardware device
High frame frequency (more than 100fps), high sensitivity, high-responsivity CCD camera；Camera shoots with frame frequency identical with light source,
And design software carries out collection and the process of data to CCD camera, the rule of modulated signal is presented, obtain corresponding
Gray value, thus complete the transmittance process of information, it is achieved the reception of character string.Selecting CCD as photo-detector, it is sensitive
Degree and responsiveness are more much higher than traditional PIN photodiode.Ining contrast to conventional photodiode, employing CCD camera can
So 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 can
To use multiple light sources, within the ability to accept of receiving terminal, increase exponentially transfer rate.And CCD is as optical detection
Device can also be simultaneously used in the middle of APT communication system.
Optical key and intelligent mobile terminal combine, and android system can well be used to develop mobile phone A AP light key
Software, android system is the operating system increased income based on Linux, be mainly used in mobile terminal (mobile phone and
Flat board) in.Android system is compared with other system platform, has the biggest advantage.Its advantage is topmost is embodied in it
Opening.Android system is the system increased income completely, and all of fan and manufacturer can participate in Android
The exploitation of system, this just development for Android system laid fine basis.Android system has become as
The system that whole world installation amount first is big.Another big advantage of Android system is namely based on the platform of Google, and Google is public
The service products such as the map of department, search, mailbox, it is possible to seamless is applied in Andriod system.
The described field programmable gate array of the present invention, inside includes configurable logic blocks CLB, input and output
Module I OB and three parts of interconnector；FPGA utilizes small-sized look-up table (16 × 1RAM) to realize combination logic, each lookup
Table is connected to the input of a d type flip flop, and trigger drives other logic circuits again or drives I/O, both thus constitutes
Can realize combination logic function and can realize again the basic logic unit module of sequential logic function, these intermodules utilize metal even
Line interconnects or is connected to I/O module；The logic of FPGA is to load programming data in fact by internally static storage cell
Existing, storage value in a memory cell determines between logic function and each module of logical block or module and I/O
Between connecting mode, and finally determine the function achieved by FPGA, FPGA allows unlimited number of programming；For preferably realizing
The present invention, it is possible to meet and make solar energy carry out generating electricity not or still meet when night whole system is supplied in illuminance
Electricity
In use, unnecessary electric energy will be stored in accumulator battery, and occur solar illuminating not or rainy weather or
During 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, centering
Central processor and field programmable gate array are powered, and reach 24 hours round-the-clock to make whole system work.
In order to realize the requirement of low cost and low-power consumption, with single-chip microcomputer as main control, control audio coder-decoder,
And carry out the transmission of data.Native system can realize the highest 2.5Mbit the traffic rate of s, farthest communication distance is up to 40m, system
Complexity is low, realization is simple, equipment volume is little, low in energy consumption, low cost and stable performance, has preferable practicality.
Accompanying drawing explanation
Fig. 1 is the system structure schematic diagram of the present invention；
Fig. 2 is LED drive circuit structure schematic diagram；
Fig. 3 is Photoelectric Detection modular structure schematic diagram.
Detailed description of the invention
Below in conjunction with the accompanying drawings a kind of based on optic communication gate inhibition's voice system of the present invention is further described in detail:
1 as it is shown in figure 1, a kind of photovoltaic phonetic warning automatically controls window, including: central processing unit, field programmable gate array
Circuit, photoelectric detective circuit, light-dependent control lock module, optical key module, reception antenna, signal processing circuit, power circuit, white light
LED, transmission of visible light link, automatic window, audio coder-decoder, audio frequency input/output terminal, power circuit；
Described signal modulating equipment is responsible for modulation and is generated the original signal of telecommunication；Described LED lamp is monochromatic LED；Described light is visited
Surveying device is that visible light wave range responds preferable CCD electrooptical device；Described reception antenna is the optical lens of variable multiple；
Described signal processing circuit adapts with photo-detector, for the process of video electrical signal, and determine light spot received shape,
Size and average received power；Being atmospheric channel between described searchlight and described reception antenna, the light that light source sends passes through
Atmospheric channel is transmitted；
Described remote visible light communication system equipment mainly includes transmitting terminal and receiving terminal；Transmitting terminal can use OOK, PPM etc.
Modulation system, the optical signal modulated is launched with the rule of high speed, light and shade change, is used high-power low beam divergence angle by light source
Array LED is as light source, owing to modulation rate is in 100 bit magnitudes, single-chip microcomputer can be used to coordinate C++ software programming to enter
The design of hardware and software of row transmitting terminal, it is achieved the transmission of character string；Receiving terminal, uses CCD to make as photo-detector, hardware device
With high more than frame frequency 100fps, high sensitivity, high-responsivity CCD camera；Camera shoots with frame frequency identical with light source,
And design software carries out collection and the process of data to CCD camera, the rule of modulated signal is presented, obtain corresponding
Gray value, thus complete the transmittance process of information, it is achieved the reception of character string；Described charging socket is arranged at the side of door close
End；Being provided with intelligent mobile terminal in described optical key module, based on intelligent mobile terminal operating system, design is based on virtual string
The key of mouth sends the software module of intelligent mobile terminal, sends out key information by the software module of intelligent mobile terminal,
Key information is exported by the min-USB mouth of intelligent mobile terminal；The key information exported, based on intelligent mobile terminal OTG
Function, in external drive module loading to LED, completes the transmission of key information by LED；Described transmission of visible light
Link includes LED drive circuit, LED, lens, PD photosensitive tube and Photoelectric Detection module；Described automatic window is single-chip microcomputer, uses
Carry out collection and the compressed encoding of speech data in the described audio coder-decoder of control, and collection data are sent by serial ports
To LED drive circuit, described LED drive circuit sends make-and-break signal according to instruction；Photoelectric Detection module controls described PD light
Quick pipe receives optical signal and is transported to described automatic window, and the data of reception are sent to described audio coding by described automatic window
Decoder is decoded output.
Described field programmable gate array, inside includes configurable logic blocks CLB, input/output module IOB
With three parts of interconnector；FPGA utilizes small-sized look-up table (16 × 1RAM) to realize combination logic, and each look-up table connects
To the input of a d type flip flop, trigger drives other logic circuits again or drives I/O, thus constitutes and both can realize
Combination logic function can realize again the basic logic unit module of sequential logic function, and these intermodules utilize metal connecting line mutual
It is coupled or attached to I/O module；The logic of FPGA loads programming data by internally static storage cell and realizes, and deposits
Storage value in a memory cell determines coupling between logic function and each module of logical block or between module with I/O
Mode, and finally determine the function achieved by FPGA, FPGA allows unlimited number of programming；To better implement the present invention,
Disclosure satisfy that and make solar energy carry out generating electricity not or still meet when night whole system is powered in illuminance.
In use, unnecessary electric energy will be stored in accumulator battery, and occur that solar illuminating is inadequate or overcast and rainy
When 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 to make whole system work.
Preferably, the uplink downlink of described gate inhibition's audio communication system based on optic communication all uses the common white light of 1W
LED, uses on-off keying-nonreturn to zero code (OOK-NRZ) modulation system.
Described humidity collection sensor is SHT21 sensor, the most not in needs temperature sensor；This sensor can be right
The temperature and humidity of environment is monitored, humidity precision ± 2% (relative humidity 20%～80%), temperature accuracy ± 0.3 DEG C (environment
Temperature 25～42 DEG C).Sensor, through demarcating, had both been provided that I2C digital interface, was also provided that PWM simulates output mode.Because
Digital communication can be substantially reduced power consumption, and in normal operation, power consumption can be within 3 μ W, in the situation extending measurement interval
Under, power consumption also can reduce further.During using 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, it is simple to detection state of charge, simultaneously
Output verification and, be favorably improved the reliability of communication.
Described microcontroller is to use single-chip microcomputer, and its CPU was made up of controller and arithmetical unit, is substantially carried out computing and refers to
Order identifies.Memorizer is the erasable flash memory of 8K, and working power is+5V.The inverting amplifier of agitator, stone is had inside it
English crystal and ceramic resonator collectively form self-excited oscillator.Pin is simple and reliable, powerful, easy to use, and has
Low power idle and power-down mode.
Described temperature sensor is DS18B20 sensor, and DS18B20 sensor has a line interface, uses simple side
Just, in actual use without outer member, directly utilize data/address bus and power, measure temperature range bigger.Therefore, make
Relatively wide by scope, purposes is bigger.
Described remote visible light communication system specifically includes:
Manipulator, needs modulates baseband signals to light carrier for visible light communication transmitting terminal, and the effect of manipulator is exactly
Such as OOK modulation, PPM modulation etc., information is first modulated into the signal of telecommunication according to different modulation systems.On manipulator hardware
51 conventional single-chip microcomputer series can be used, in order to reach the requirement of higher speed and precision, it is also possible to select FPGA
Deng.
LED drives, and is used for converting electrical signals to optical signal.LED drives module to be used for driving LED light source
Dynamic function, is converted into optical signal by the signal of telecommunication being adjusted to simultaneously and is loaded on LED light source.Such as 51 single-chip microcomputers, it triggers
Mode is that TTL triggers, and completes to drive LED light source.
LED, is the discharger of visible light communication system, in order to meet the demand of communication system, should select merit as far as possible
Rate is big, beam divergence angle is little, white light LEDs light source.Additionally, select array format LED light source can increase luminous power, and to beam spreading
Angle commonly reaches 4 degree.
LED controller, is used for controlling the equipment of light source and camera, completes miscellaneous function.
Atmospheric channel, the flashlight being adjusted to is launched, is transmitted by atmospheric channel by light source, will be subject in transmitting procedure
Impact to atmospheric channel.
Camera lens, camera lens is i.e. reception antenna, mainly completes the seizure receive capabilities of optical signal, and camera lens can enter
Row zoom, changes field of view of receiver angle, and can zoom in or out target.For the ease of cooperating with CCD camera, it is configured with
Motorized zoom lens 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 through
Gigabit Ethernet is connected on computer, and is completed collection and the process of view data by program.
Imaging process, for the modulated optical signal received is received imaging, analyzes its gray-level light intensity, solves
Recalling raw information, the information that completes receives.
As in figure 2 it is shown, in described LED drive circuit, the voice data from single-chip microcomputer is amplified by mutual conductance amplifying circuit
And it is converted into current signal, by being loaded in LED after Bias-T superposition direct current.The angle of divergence of LED is generally large,
LED front end adds apart from adjustable collimating lens, the dispersion angle of light regulating, in order to for the illumination of different distance and logical
Letter.
Preferably, described PD photosensitive tube be receiving area be 5mm × 5mm, PD photosensitive tube.PD photosensitive tube area connects the most greatly
The luminous power received is the biggest, but responsive bandwidth can be the least.The aspheric collimation lens increase that PD photosensitive tube front end adds area bigger connects
Receive luminous power.PD photosensitive tube converts optical signals into current signal output, current visible ray PD photosensitive tube response sensitivity peak
Value mostly at red spectral band, described PD photosensitive tube sensitivity at LED light spectrum peak 450nm less than 0.3A W.When communication away from
From farther out time, the luminous power that PD photosensitive tube receives is less, and the current signal therefore exported is the least, the most several × 10mA.
Process to carry out follow-up data, need the electric current of PD photosensitive tube output is amplified.
As it is shown on figure 3, in described Photoelectric Detection module, current signal is converted into electricity by the low noise trans-impedance amplifier of the 1st grade
Pressure signal, then after the 2nd step voltage amplifier, voltage amplitude can reach 2～3V, exports 3.3V after voltage comparator
TTL signal, be input to single-chip microcomputer and process.
Described audio coder-decoder is the WM8960 audio codec that a low-power consumption, high-fidelity and volume are little,
It is integrated with mike, earphone interface and amplifier, therefore greatly reduces quantity and the circuit volume of external circuit components and parts.
The analog audio data of mike input carries out audio coding after the ADC of 24bit samples, and decoded data are through 24bit
DAC after output to earphone or speaker.In system, codec transmits voice data by digital interface, is connect by control
Mouth receives and controls data.The sample rate of this encoder could be arranged to 8～48kHz, and the data of left and right sound channels are 16bit,
Therefore the speed of voice signal is 256～1536kbit/s, when traffic rate is more than 1536kbit/s it is ensured that clearly
Voice transfer.
Described gate inhibition's audio communication system based on optic communication uses intensity modulated and direct detection (IM/DD), i.e. LED to send out
Penetrate luminous power with transmission signal intensity, the photoelectric detector of receiving terminal, such as photodiode (PD), avalanche diode (APD)
First-class with camera lens, receive the light intensity of power change and change into current signal.Owing to there is direct projection link between sending and receiving end
Time, direct projection link power accounts for the 97.6% of total received power, time after the PD of communication terminal is positioned at LED light source, the most permissible
Ignore the transmitting terminal light interference effect to self receiving terminal.Therefore, uplink downlink all uses white light LEDs to communicate.Institute
State remote visible light communication system to specifically include:
Manipulator, needs modulates baseband signals to light carrier for visible light communication transmitting terminal, and the effect of manipulator is exactly
Such as OOK modulation, PPM modulation etc., information is first modulated into the signal of telecommunication according to different modulation systems.On manipulator hardware
51 conventional single-chip microcomputer series can be used, in order to reach the requirement of higher speed and precision, it is also possible to select FPGA
Deng.
LED drives, and is used for converting electrical signals to optical signal.LED drives module to be used for driving LED light source
Dynamic function, is converted into optical signal by the signal of telecommunication being adjusted to simultaneously and is loaded on LED light source.Such as 51 single-chip microcomputers, it triggers
Mode is that TTL triggers, and completes to drive LED light source.
LED, is the discharger of visible light communication system, in order to meet the demand of communication system, should select merit as far as possible
Rate is big, beam divergence angle is little, white light LEDs light source.Additionally, select array format LED light source can increase luminous power, and to beam spreading
Angle commonly reaches 4 degree.
LED controller, is used for controlling the equipment of light source and camera, completes miscellaneous function.
Atmospheric channel, the flashlight being adjusted to is launched, is transmitted by atmospheric channel by light source, will be subject in transmitting procedure
Impact to atmospheric channel.
Camera lens, camera lens is i.e. reception antenna, mainly completes the seizure receive capabilities of optical signal, and camera lens can enter
Row zoom, changes field of view of receiver angle, and can zoom in or out target.For the ease of cooperating with CCD camera, it is configured with
Motorized zoom lens 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 through
Gigabit Ethernet is connected on computer, and is completed collection and the process of view data by program.
Imaging process, for the modulated optical signal received is received imaging, analyzes its gray-level light intensity, solves
Recalling raw information, the information that completes receives.
Above in conjunction with accompanying drawing, embodiments of the invention are described, but the invention is not limited in above-mentioned concrete
Embodiment, above-mentioned detailed description of the invention is only schematic rather than restrictive, those of ordinary skill in the art
Under the enlightenment of the present invention, in the case of without departing from present inventive concept and scope of the claimed protection, it may also be made that a lot
Form, within these belong to the protection of the present invention.
Claims (6)
1. a photovoltaic phonetic warning automatically controls window, it is characterised in that include；Automatic window, central processing unit, scene can
Programming gate-array circuit, photoelectric detective circuit, light-dependent control lock module, optical key module, reception antenna, signal processing circuit, power supply
Circuit, white light LEDs, transmission of visible light link, audio coder-decoder, audio frequency input/output terminal, power circuit；
Described signal modulating equipment is responsible for modulation and is generated the original signal of telecommunication；Described LED lamp is monochromatic LED；Described light is visited
Surveying device is that visible light wave range responds preferable CCD electrooptical device；Described reception antenna is the optical lens of variable multiple；
Described signal processing circuit adapts with photo-detector, for the process of video electrical signal, and determine light spot received shape,
Size and average received power；Being atmospheric channel between described searchlight and described reception antenna, the light that light source sends passes through
Atmospheric channel is transmitted；Described automatic window includes microcontroller, socket switch and Optical Receivers, described light-receiving mould
Block receives LED communication signal from LED group, to obtaining control instruction after described LED communication signal processing, and by described control
Instruction is transported to microcontroller, and described microcontroller generates the instruction that performs of socket switch according to described control instruction, described slotting
Seat switch is electromagnetic relay, and described electromagnetic relay is connected with the damping device of socket；
Described automatic window includes microprocessor, power control circuit, circuitry for signal measurement, power-switching circuit, light-receiving mould
Block, described microprocessor receives the control instruction that described Optical Receivers obtains, and according to described control instruction, control circuit realizes
The energising of automatic window and power-off；Described power control circuit includes that relay, described microprocessor send control signal, controls
The folding of relay changes the power supply of load, and the capacity of described relay is higher than the peak power of load, described relay
Loop also includes diode and capacitor element, for absorbing reverse current and the high pressure of folding moment；Described circuitry for signal measurement
It is connected with power control circuit, it is thus achieved that the voltage of automatic window, electric current forceful electric power signal first pass through divider resistance, copper-manganese sheet is converted to
Weak electric signal, then input to special computation chip, complete plurality of voltages current effective value, power etc. and calculate, the data of generation
It is transported to microprocessor；The alternating voltage of 220V is carried out AC-DC conversion by described power-switching circuit, in output circuit system
The DC voltage needed；
Described remote visible light communication system equipment mainly includes transmitting terminal and receiving terminal；Transmitting terminal can use OOK, PPM etc.
Modulation system, the optical signal modulated is launched with the rule of high speed, light and shade change, is used high-power low beam divergence angle by light source
Array LED is as light source, owing to modulation rate is in 100 bit magnitudes, single-chip microcomputer can be used to coordinate C++ software programming to enter
The design of hardware and software of row transmitting terminal, it is achieved the transmission of character string；Receiving terminal, uses CCD to make as photo-detector, hardware device
With high more than frame frequency 100fps, high sensitivity, high-responsivity CCD camera；Camera shoots with frame frequency identical with light source,
And design software carries out collection and the process of data to CCD camera, the rule of modulated signal is presented, obtain corresponding
Gray value, thus complete the transmittance process of information, it is achieved the reception of character string；Described charging socket is arranged at the side of door close
End；
Described power circuit connects central processing unit and field programmable gate array respectively；It is provided with in described power circuit
Solar panel, mu balanced circuit, power-supply controller of electric and DC power-supply circuit；Described transmission of visible light link includes that LED drives
Circuit, LED, lens, PD photosensitive tube and Photoelectric Detection module；Described automatic window is single-chip microcomputer, is used for controlling described audio frequency
Coding decoder carries out collection and the compressed encoding of speech data, and by serial ports, collection data are sent to LED driving electricity
Road, described LED drive circuit sends make-and-break signal according to instruction；Photoelectric Detection module controls described PD photosensitive tube and receives optical signal
And it being transported to described automatic window, the data of reception are sent to described audio coder-decoder and are decoded by described automatic window
Output.
A kind of gate inhibition's voice system based on optic communication the most according to claim 1, it is characterised in that described scene can
Programming gate-array circuit, inside includes configurable logic blocks CLB, input/output module IOB and three parts of interconnector；
FPGA utilizes small-sized look-up table (16 × 1RAM) to realize combination logic, and each look-up table is connected to the input of a d type flip flop
End, trigger drives other logic circuits again or drives I/O, thus constituting and not only can realize combination logic function but also can realize
The basic logic unit module of sequential logic function, these intermodules utilize metal connecting line interconnect or be connected to I/O module；
The logic of FPGA loads programming data by internally static storage cell and realizes, storage value in a memory cell
Determine the connecting mode between logic function and each module of logical block or between module and I/O, and finally determine
Function achieved by FPGA, FPGA allows unlimited number of programming.
A kind of gate inhibition's voice system based on optic communication the most according to claim 2, it is characterised in that described LED drives
In circuit, the voice data from single-chip microcomputer is amplified and converted to current signal by mutual conductance amplifying circuit, passes through Bias-T
It is loaded in LED after superposition direct current.
A kind of gate inhibition's voice system based on optic communication the most according to claim 1, it is characterised in that
Gate inhibition's audio communication system based on optic communication uses intensity modulated and directly detects (IM/DD), i.e. LED emission luminous power
With transmission signal intensity, the photoelectric detector of receiving terminal, such as photodiode (PD), avalanche diode (APD) and camera lens
First-class, receive the light intensity of power change and change into current signal.
5., time owing to there is direct projection link between sending and receiving end, direct projection link power accounts for the 97.6% of total received power, works as communication
When the PD of terminal is positioned at after LED light source, almost can ignore the transmitting terminal light interference effect to self receiving terminal.
A kind of gate inhibition's voice system based on optic communication the most according to claim 4, it is characterised in that described Photoelectric Detection
In module, current signal is converted into voltage signal by the low noise trans-impedance amplifier of the 1st grade, then after the 2nd step voltage amplifier
Voltage amplitude can reach 2～3V, exports the TTL signal of 3.3V after voltage comparator, is input to single-chip microcomputer and processes.
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