CN105933061A - Indoor wireless CCD controlled automatic curtain - Google Patents
Indoor wireless CCD controlled automatic curtain Download PDFInfo
- Publication number
- CN105933061A CN105933061A CN201610440692.0A CN201610440692A CN105933061A CN 105933061 A CN105933061 A CN 105933061A CN 201610440692 A CN201610440692 A CN 201610440692A CN 105933061 A CN105933061 A CN 105933061A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
- H04B10/114—Indoor or close-range type systems
- H04B10/116—Visible light communication
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47H—FURNISHINGS FOR WINDOWS OR DOORS
- A47H5/00—Devices for drawing draperies, curtains, or the like
- A47H5/02—Devices for opening and closing curtains
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C23/00—Non-electrical signal transmission systems, e.g. optical systems
- G08C23/04—Non-electrical signal transmission systems, e.g. optical systems using light waves, e.g. infrared
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- General Physics & Mathematics (AREA)
- Optical Communication System (AREA)
Abstract
The invention discloses an indoor wireless CCD controlled automatic curtain. The indoor wireless CCD controlled automatic curtain comprises a bridge circuit which is used for connecting a computer USB interface and an optical transmitting and receiving circuit, and receiving or transmitting signals which are converted from computer USB data signals; a central processing unit; a field programmable gate array circuit; a power supply circuit and an optical key module. The power supply circuit is connected with the central processing unit and the field programmable gate array circuit. A solar cell panel, a voltage stabilizing circuit, a power supply controller and a direct current power supply circuit are arranged in the power supply circuit. According to the system, a point-to-point communication mode is realized; transmitting and receiving are carried out by using relatively small transmitting and receiving angles; only manual rough alignment is needed when the automatic curtain is used. The automatic curtain is applied to indoor short distance wireless communication. A data communication speed of more than 10 Mbps can be realized. The transmission distance reaches about 5 meters. The data communication demands of indoor environments such as offices, laboratories and homes can be satisfied basically.
Description
Technical field
The present invention relates to technical field of visible light communication, especially a kind of indoor wireless CCD controls automatic curtain.
Background technology
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.
Visible light communication technology, is that the high speed light and shade being invisible to the naked eye utilizing fluorescent lamp or light emitting diode etc. to send is dodged
Bright signal transmits information, is connected on illuminator by the wire device of high-speed Internet, and inserting attaching plug can make
With.The system utilizing this technology to make can cover the scope that indoor light reaches, and computer need not electric wire and connects, thus tool
There is DEVELOPMENT PROSPECT widely.Compared to other radio communication system, it is seen that the major advantage of optic communication is:
(1) the linear directional circulation way of optic communication makes its narrow transmitting beam, good directionality, and the angle of divergence of light beam generally all exists
Milliradian, even microradian magnitude, therefore have the confidentiality of data transmission, unless its communication link is intercepted, otherwise data
It is difficult to leak.Owing to these wave beams very orient, it is in alignment with a certain receiver, as thought interposition, it is necessary to connect with another portion
Receipts machine is directed at transmitter in sighting distance, in addition it is also necessary to knowing how to receive signal, this is difficult to accomplish.If connect by sanction, then
Originally link is just interrupted, and user is it finds that information is by interposition.
(2) need not carry out the pipeline engineering construction of costliness, its construction cost is about 20 % of optical cable.Networking is convenient, rapid,
Optic communication networking speed is fast, need only carry out equipment installation in communication point, is suitable for interim use and the emergency group in complicated landform
Net, the most very convenient for again replacing deployment.
(3) due to optical wavelength short (several microns of the about zero point of visible ray), so in the case of completing said function, light
The size of sending and receiving end is more much smaller than the size of microwave, millimeter wave communication antenna, has the spies such as power consumption is little, volume is little, lightweight
Point, corresponding device cost is relatively low.
Although optic communication has plurality of advantages, but there is also some drawbacks, such as: light wave can not penetrate the obstacles such as wall
Thing, easily by the interference etc. of the background noises such as sunlight, electric filament lamp, fluorescent lamp.
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 point-to-point communication mode,
Sending and receiving all use relatively small reception, launch angle, only need manual coarse alignment during use, are applied to indoor short distance
Radio communication, can reach the data communication rates of more than 10Mbps, and transmission range reaches about 5 meters, substantially meet office,
The indoor LED visible light communication jack system of the data communication requirements of the indoor environment such as laboratory, family.
For achieving the above object, it is proposed that following technical scheme:
A kind of indoor wireless CCD controls automatic curtain, including:
Central processing unit, field programmable gate array, power circuit, optical key module, signal modulation control equipment, LED
Lamp, automatic curtain, photo-detector, signal processing circuit；
Described automatic curtain includes that core processor module, LED light receive circuit, memory module, key-press module, power protection
With level switch module, relay module；Described relay module includes relay circuit and travel switch, wherein said stroke
Switch is positioned on automatic curtain rail, is connected with the described relay circuit within controller by wire；Core processor leads to
The break-make crossing control relay realizes the selection of power supply wiring point, and described relay module includes 2 relays, passes through relay
Connect or disconnect and realize rotating and reverse of motor, thus realize the opening and closing of curtain；Described 2 relay circuits
Normally-closed contact with 2 travel switches is connected the most respectively；When curtain has fully opened or closes, system can automatically by
Power supply disconnects, the generation of pre-anticollision, and can send position signalling by the normally opened contact of travel switch to controller；Described
LED light receives circuit and receives the LED communication signal of LED illumination lamp group and be converted into control instruction and be transported to core processor；Institute
Stating power protection and include power protection part and level converting section with level switch module, described level converting section is to daily
220 V alternating voltages are converted to 5 V direct voltage outputs by electric main；Described power protection part is one and power supply
The electric fuse of input series connection；Described key-press module includes a free-standing button, is used for realizing system reboot and recovering initial
Arrange.
Described central processing unit connects optical key module, signal modulation control equipment, LED lamp, automatic curtain, optical detection
Device, signal processing circuit；Described signal modulating equipment is responsible for modulation and is generated the original signal of telecommunication；Described LED lamp is monochromatic
LED；Described photo-detector is that visible light wave range responds preferable CCD electrooptical device；Described automatic curtain is variable multiple
Optical lens；Described signal processing circuit adapts with photo-detector, for the process of video electrical signal, and determines reception
The shape of hot spot, size and average received power；Being atmospheric channel between described searchlight and described automatic curtain, light source is sent out
The light gone out is transmitted by atmospheric channel；Described power circuit connects central processing unit and field programmable gate array electricity respectively
Road；Solar panel, mu balanced circuit, power-supply controller of electric and DC power-supply circuit it is provided with in described power circuit；Described light
It is provided with intelligent mobile terminal in key module, based on intelligent mobile terminal operating system, designs key based on virtual serial port
Send the software module of intelligent mobile terminal, send out key information, key information by the software module of intelligent mobile terminal
Exported by the min-USB mouth of intelligent mobile terminal；The key information exported, based on intelligent mobile terminal OTG function, warp
Cross external drive module loading to LED, completed the transmission of key information by LED；
Being provided with intelligent mobile terminal in described optical key module, based on intelligent mobile terminal operating system, design is based on virtual
The key of serial ports sends the software module of intelligent mobile terminal, sends out key by the software module of intelligent mobile terminal and believes
Breath, 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 at a distance
Visible light communication system equipment mainly includes transmitting terminal and receiving terminal；Transmitting terminal can use the modulation systems such as OOK, PPM, light source
The optical signal modulated is launched with the rule of high speed, light and shade change, uses high-power low beam divergence angle array LED conduct
Light source, owing to modulation rate is in 100 bit magnitudes, can use single-chip microcomputer to coordinate C++ software programming to carry out the soft of transmitting terminal
Hardware designs, it is achieved the transmission of character string；Receiving terminal, uses CCD to use high frame frequency as photo-detector, hardware device
More than 100fps, high sensitivity, high-responsivity CCD camera；Camera shoots with frame frequency identical with light source, and designs
Software carries out collection and the process of data to CCD camera, the rule of modulated signal is presented, obtains 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；
Bridgt circuit: connect USB interface of computer and light transmission circuit, will carry out at conversion from computer usb data signal
Manage into the signal of applicable radiating circuit modulation, be changed being processed into usb data signal by the signal that reception circuit is sent here simultaneously
Give computer, it is achieved the wireless duplex communication of two-forty；It is provided with intelligent mobile terminal, based on intelligence in described optical key module
Energy mobile terminal operating system, designs key based on virtual serial port and sends the software module of intelligent mobile terminal, by intelligence
The software module of mobile terminal sends out key information, and key information is exported by the min-USB mouth of intelligent mobile terminal；Institute is defeated
The key information gone out, based on intelligent mobile terminal OTG function, in external drive module loading to LED, is come by LED
Complete the transmission of key information；
Optical sender: the signal processed through usb circuit is carried out coded modulation, modulated signal is again through putting
Modulated light source visible LED one by one is sent to so that it is send visible ray light pulse signal (this being encoded signal of telecommunication modulation after great
Process is referred to as electro-optic conversion, i.e. E/O changes), after in optical antenna is transmitted into atmospheric channel.
Photoreceiver: by optical antenna, transmitting terminal is sent the light pulse signal come and converge to photoelectric detector PIN,
The optical signal of reception is converted into the signal of telecommunication (this process is referred to as opto-electronic conversion, i.e. O/E changes), the faint electricity that conversion comes
Signal gives usb circuit after amplifying demodulation.
Described optical sender includes light source and driver and auxiliary circuit.Described auxiliary circuit includes light detection device, nothing
Optical alarm circuit, automatic power control circuit (APC) and automatic temp. controlling circuit (ATC)；During use, the signal of telecommunication is input to drive
Dynamic device, described driver is connected with light source, and automatic temp. controlling circuit regulation and control light-source temperature, described light detection device is arranged on light source
In range of exposures, and it is connected with without optical alarm circuit, with driving after described light detection device and automatic power control circuit connection
Device constitutes feedback circuit.
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, it is possible to meet illuminance make solar energy carry out generating electricity not or when night still
Meet and whole system is powered；
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.
Key to be sent is that TTL level signal, i.e.+5V represent high level " 1 ", and 0V represents low level " 0 "；Described
LED drive module includes PNP type paster audion S8550 and related peripheral device thereof, is used for realizing the signal of telecommunication to optical signal
Conversion；The device of described one one-to-many of optical key module；Optical key designs based on single-chip microcomputer STC12C2052AD
A kind of transmitting terminal.
Described light source works wave band is HONGGUANG 650nm, compared with green glow and blue light, when HONGGUANG is transmitted in atmospheric channel,
There is in resistivity to the fluorescence in background noise and ultraviolet certain advantage.
Described transmitter circuitry uses the red light-emitting diode (LED) light source as transmitter of 650nm.For room
Interior portable radiotelephone optical transmission device, light source must is fulfilled for following basic requirement: meet eye-safe requirement；Modulation speed
Rate meets design and requires (>=10Mb/s)；Service life is long；Price is low, reduces cost.Described LED drive circuit uses differential electrical
Road.
Described optical receiver circuit includes photodetector, amplifying circuit and signal processing circuit, for intensity modulated
Digital optical signal, when receiving terminal uses direct detection mode, mainly by photoelectric detector, low noise preamplifier, main amplification
Device, agc circuit etc. constitute the linear passageway of photoreceiver, to complete optical electrical conversion, needed for signal is amplified to decision circuit
Signal level.
In optical communication system, the effect of receiver is to be changed into the signal of telecommunication receiving optical signal.First by light electrical resistivity survey
Survey the channel transmission that optical sender is sent by device (can be PIN photodiode, it is also possible to be PAD avalanche photodide)
After faint optical signal be changed into the signal of telecommunication.The output signal electric current of photodetector is the least, it is necessary to by low noise, broadband
Preamplifier be amplified.Photodetector and preamplifier constitute photoreceiver front-end, and its noiseproof feature will be certainly
Determine the main because of family of receiving sensitivity.Main amplifier, equalizer and agc circuit carry out the amplification of high-gain and to signal to signal
Compensate, shaping, with improve signal to noise ratio, reduce the bit error rate, make the pulse of output be suitable for judgement requirement.
Described low noise preamplifier is broadband, low-noise amplifier, because circuit operating rate is higher, is preferably,
LNA uses trans-impedance amplifier.
This beneficial effect of the invention:
The indoor LED visible light communication system of the present invention mainly includes USB bridgt circuit, optical sender and photoreceiver, hardware
Circuit is small and exquisite, easy to use, and service behaviour is good, described automatic curtain include core processor module, LED light receive circuit,
Memory module, key-press module, power protection and level switch module, relay module；Described relay module includes relay
Device circuit and travel switch, wherein said travel switch is positioned on automatic curtain rail, by wire and the institute within controller
State relay circuit to be connected；Core processor realizes the selection of power supply wiring point, described relay by the break-make controlling relay
Device module includes 2 relays, realizes rotating and reverse of motor by connecting or disconnecting of relay, thus realizes curtain
Opening and closing；Described 2 relay circuits normally-closed contact with 2 travel switches the most respectively is connected；When curtain is the completeest
When entirely opening or closing, power supply can be disconnected by system automatically, the generation of pre-anticollision, and can be touched by the normally opened of travel switch
Point sends position signalling to controller；Described LED light receives circuit and receives the LED communication signal of LED illumination lamp group and be converted into
Control instruction is transported to core processor；Described power protection and level switch module include power protection part and level conversion
Part, 220 V alternating voltages are converted to 5 V direct voltage outputs to daily electric main by described level converting section；
Described power protection part is an electric fuse connected with power input；Described key-press module include a stand alone type by
Key, is used for realizing system reboot and recovering initial setting up.
Method and the technology such as application artificial taste intelligent system, knowledge engineering, pattern recognition, artificial neural network, carried out
Intelligent, integrated, concert rationality, the computer management system of a new generation designing and realizing.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.
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.
To better implement the present invention, it is possible to meet and make solar energy carry out generating electricity not in illuminance or still meet when night
Whole system is powered；
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.Long distance
From visible light communication system, have employed OOK modulation system at transmitting terminal, OOK bandwidth demand is low, and hardware realizes letter the most
Single, have only to the method by directly detection when decoding, when determining, by the presence or absence judging light, the information received 0 or
1；Make transmitting terminal cost reasonable；At receiving terminal, CCD is used to use high frame frequency (100fps as photo-detector, hardware device
Above), high sensitivity, high-responsivity CCD camera；Camera shoots with frame frequency identical with light source, and design software pair
CCD camera carries out collection and the process of data, the rule of modulated signal is presented, and obtains corresponding gray value, thus complete
The transmittance process of one-tenth information, it is achieved the reception of character string.Selecting CCD as photo-detector, its sensitivity and responsiveness ratio pass
The PIN photodiode of system is much higher.It in contrast to conventional photodiode, use CCD camera can make the position of light source
Can clearly indicating out in the picture, so, as long as can interpolate that out the position of signal, multiple light can be used in the future
Source, within the ability to accept of receiving terminal, increases exponentially transfer rate.And CCD can also be as photo-detector simultaneously
In the middle of APT communication system.
Support hot plug on computers, fully demonstrated USB interface device and used feature quickly and easily.Driving
Under the support of program, realizing point-to-point double-direction radio optic communication between computer, traffic rate can reach 11Mbps, it is achieved that
USB interface-based visible ray (HONGGUANG) wireless points point to-point communication between computer.This system is mainly applied to indoor short distance
From horizon range in, use 650nm as operation wavelength, the visible light wave range in short wavelength can be with mesh in installation and debugging
Depending on alignment, eliminate infrared band and be worth expensive telescope to Barebone；And the optical device price of visible light wave range is only
The tens of 850/1550nm device even more than one percent, greatly reduces system cost.LED light source drive circuit uses
Difference channel；Difference channel is due to the effect of constant-current source, even if there is big electric current drift, this kind of circuit is it is also ensured that the most steady
Fixed supply current, thus ensure the job stability of circuit；Even if during high voltage output, voltage drift phenomenon occurs, as long as letter
Number remaining in that balance, the cross interference that this circuit causes is the most relatively small；For there is the prime of easy generation parasitism
In the case of circuit, in view of this circuit common-mode gain is relatively low, so the probability that it introduces unwanted oscillation to prime is the least.
Accompanying drawing explanation
Fig. 1 is system architecture diagram；
Fig. 2 is optical transmitter circuit block diagram；
Fig. 3 is LED light source drive circuit；
Fig. 4 is that light receives machine circuit block diagram；
Fig. 5 is trans-impedance amplifier circuit diagram.
Detailed description of the invention
Below in conjunction with the accompanying drawings the 11 of the present invention are further described in detail:
1 as it is shown in figure 1, include:
Central processing unit, field programmable gate array, power circuit, optical key module, signal modulation control equipment, LED
Lamp, automatic curtain, photo-detector, signal processing circuit；Described automatic curtain includes microcontroller, socket switch and light-receiving
Module, described Optical Receivers receives LED communication signal from LED group, controls obtaining after described LED communication signal processing
Instruction, and described control instruction is transported to microcontroller, described microcontroller generates socket switch according to described control instruction
Perform instruction, described socket switch is electromagnetic relay, and described electromagnetic relay is connected with the damping device of socket；
Described automatic curtain includes that core processor module, LED light receive circuit, memory module, key-press module, power protection
With level switch module, relay module；Described relay module includes relay circuit and travel switch, wherein said stroke
Switch is positioned on automatic curtain rail, is connected with the described relay circuit within controller by wire；Core processor leads to
The break-make crossing control relay realizes the selection of power supply wiring point, and described relay module includes 2 relays, passes through relay
Connect or disconnect and realize rotating and reverse of motor, thus realize the opening and closing of curtain；Described 2 relay circuits
Normally-closed contact with 2 travel switches is connected the most respectively；When curtain has fully opened or closes, system can automatically by
Power supply disconnects, the generation of pre-anticollision, and can send position signalling by the normally opened contact of travel switch to controller；Described
LED light receives circuit and receives the LED communication signal of LED illumination lamp group and be converted into control instruction and be transported to core processor；Institute
Stating power protection and include power protection part and level converting section with level switch module, described level converting section is to daily
220 V alternating voltages are converted to 5 V direct voltage outputs by electric main；Described power protection part is one and power supply
The electric fuse of input series connection；Described key-press module includes a free-standing button, is used for realizing system reboot and recovering initial
Arrange.
Described central processing unit connects optical key module, signal modulation control equipment, LED, automatic curtain, optical detection
Device, signal processing circuit；Described signal modulating equipment is responsible for modulation and is generated the original signal of telecommunication；Described LED lamp is monochromatic
LED；Described photo-detector is that visible light wave range responds preferable CCD electrooptical device；Described automatic curtain is variable multiple
Optical lens；Described signal processing circuit adapts with photo-detector, for the process of video electrical signal, and determines reception
The shape of hot spot, size and average received power；Being atmospheric channel between described searchlight and described automatic curtain, light source is sent out
The light gone out is transmitted by atmospheric channel；Described power circuit connects central processing unit and field programmable gate array electricity respectively
Road；Solar panel, mu balanced circuit, power-supply controller of electric and DC power-supply circuit it is provided with in described power circuit；Described light
It is provided with intelligent mobile terminal in key module, based on intelligent mobile terminal operating system, designs key based on virtual serial port
Send the software module of intelligent mobile terminal, send out key information, key information by the software module of intelligent mobile terminal
Exported by the min-USB mouth of intelligent mobile terminal；The key information exported, based on intelligent mobile terminal OTG function, warp
Cross external drive module loading to LED, completed the transmission of key information by LED；
Sending out key information by the software module of intelligent mobile terminal, key information is by the min-USB of intelligent mobile terminal
Mouth output；The key information exported, based on intelligent mobile terminal OTG function, through external drive module loading to LED
On, the transmission of key information is completed by LED；Described remote visible light communication system equipment mainly includes transmitting terminal and connects
Receiving end；Transmitting terminal can use the modulation systems such as OOK, PPM, the rule that the optical signal modulated is changed by light source with high speed, light and shade
Launch, use high-power low beam divergence angle array LED as light source, owing to modulation rate is in 100 bit magnitudes, permissible
Single-chip microcomputer is used to coordinate C++ software programming to carry out the design of hardware and software of transmitting terminal, it is achieved the transmission of character string；Receiving terminal, uses
CCD uses high more than frame frequency 100fps, high sensitivity, high-responsivity CCD camera as photo-detector, hardware device；Phase
Machine shoots with frame frequency identical with light source, and design software carries out collection and the process of data to CCD camera, will modulation
The rule of signal presents, and obtains corresponding gray value, thus completes the transmittance process of information, it is achieved the reception of character string；
Described charging socket is arranged at the side of door close；
Bridgt circuit: connect USB interface of computer and light transmission circuit, will carry out at conversion from computer usb data signal
Manage into the signal of applicable radiating circuit modulation, be changed being processed into usb data signal by the signal that reception circuit is sent here simultaneously
Give computer, it is achieved the wireless duplex communication of two-forty.
Optical sender: the signal processed through usb circuit is carried out coded modulation, modulated signal warp again
Modulated light source visible LED one by one is sent to so that it is send the visible ray light pulse signal being encoded signal of telecommunication modulation after crossing amplification
(this process is referred to as electro-optic conversion, i.e. E/O change), after in optical antenna is transmitted into atmospheric channel.
Photoreceiver: by optical antenna, transmitting terminal is sent the light pulse signal come and converge to photoelectric detector PIN,
The optical signal of reception is converted into the signal of telecommunication (this process is referred to as opto-electronic conversion, i.e. O/E changes), the faint electricity that conversion comes
Signal gives usb circuit after amplifying demodulation.
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, it is possible to meet illuminance make solar energy carry out generating electricity not or when night still
Meet and whole system is powered.
Key to be sent is that TTL level signal, i.e.+5V represent high level " 1 ", and 0V represents low level " 0 "；Described
LED drive module includes PNP type paster audion S8550 and related peripheral device thereof, is used for realizing the signal of telecommunication to optical signal
Conversion；The device of described one one-to-many of optical key module；Optical key designs based on single-chip microcomputer STC12C2052AD
A kind of transmitting terminal.
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.
When the various kinds of sensors (Smoke Sensor, temperature sensor) being connected in VISIBLE LIGHT EMISSION module finds that disaster goes out
Now, alarm signal can be sent to the core control circuit of this module immediately.Core control circuit sends alarm signal immediately and arrives
In ethernet communication module, issued the user with warning information by the Internet simultaneously.This automatic curtain should be able to by cut-offfing power supply,
Control the power supply of electrical equipment on socket, or frame control that the port of electrical equipment is said the word, the household electrical appliances of control include air-conditioning, electricity
Rice cooker, automatic curtain etc..Automatic curtain communicates with core control circuit, transfers data to master controller or response is main
The order of controller, it is ensured that the normal work of intelligent domestic system.Automatic curtain constitutes effective communication network with master controller
Network, fast and stable is answered in communication.
It addition, Intelligent socket can achieve remotely control by gsm communication module, user can start before going home
Intelligent socket, improves indoor air humidity, closing, closing Intelligent socket before even if forgetting to go out after being away from home, it is possible to
To send control instruction by mobile phone, close Intelligent socket, the use time of Intelligent socket of so can making rational planning for, postpone to make
With life-span and the saving energy.
As in figure 2 it is shown, described optical sender includes light source and driver and auxiliary circuit.Described auxiliary circuit includes light
Monitor, without optical alarm circuit, automatic power control circuit (APC) and automatic temp. controlling circuit (ATC)；During use, telecommunications
Number being input to driver, described driver is connected with light source, automatic temp. controlling circuit regulation and control light-source temperature, described light detection device
Being arranged in light source range of exposures, and be connected with without optical alarm circuit, described light detection device and an automatic power control circuit are even
Connect rear and driver composition feedback circuit.
Preferably, described light source works wave band is HONGGUANG 650nm, and compared with green glow and blue light, HONGGUANG is at atmospheric channel
During middle transmission, the resistivity to the fluorescence in background noise and ultraviolet has certain advantage.
Preferably, described transmitter circuitry uses the red light-emitting diode (LED) light as transmitter of 650nm
Source.For indoor portable radiotelephone optical transmission device, light source must is fulfilled for following basic requirement: meets eye-safe and wants
Ask；Modulation rate meets design and requires (>=10Mb/s)；Service life is long；Price is low, reduces cost.As it is shown on figure 3, it is described
LED drive circuit uses difference channel.
As shown in Figure 4, described optical receiver circuit includes photodetector, amplifying circuit and signal processing circuit, for
The digital optical signal of intensity modulated, when receiving terminal uses direct detection mode, is mainly put by before photoelectric detector, low noise
Big device, main amplifier, agc circuit etc. constitute the linear passageway of photoreceiver, to complete optical electrical conversion, signal are amplified to sentence
The certainly signal level needed for circuit.
In optical communication system, the effect of receiver is to be changed into the signal of telecommunication receiving optical signal.First by light electrical resistivity survey
Survey the channel transmission that optical sender is sent by device (can be PIN photodiode, it is also possible to be PAD avalanche photodide)
After faint optical signal be changed into the signal of telecommunication.The output signal electric current of photodetector is the least, it is necessary to by low noise, broadband
Preamplifier be amplified.Photodetector and preamplifier constitute photoreceiver front-end, and its noiseproof feature will be certainly
Determine the main because of family of receiving sensitivity.Main amplifier, equalizer and agc circuit carry out the amplification of high-gain and to signal to signal
Compensate, shaping, with improve signal to noise ratio, reduce the bit error rate, make the pulse of output be suitable for judgement requirement.
Described low noise preamplifier is broadband, low-noise amplifier, because circuit operating rate is higher, is preferably,
LNA uses trans-impedance amplifier.
As it is shown in figure 5, wherein, Iin is the photogenerated current of photodetector, and Ay is ideal amplifier.Negative feedback therein
Network Rf detects output end voltage and feeds back to input in the form of electric current.On the one hand the amplifier of this form ensures
It has a less input impedance, such that it is able to the photoelectric current that picked-up photodetector in amplitude peak ground produces；On the other hand,
There is good load-carrying ability.It is that a kind of feedback resistance Rf of passing through provides degenerative high increasing to amplifier in
Benefit high-impedance amplifier, substantially one current-voltage converter, noise is low, bandwidth and dynamic range big.
Claims (8)
1. an indoor wireless CCD controls automatic curtain, it is characterised in that including:
Automatic curtain, central processing unit, field programmable gate array, power circuit, optical key module, signal modulation control
Equipment, LED lamp, photo-detector, signal processing circuit；Described automatic curtain includes microcontroller, socket switch and light-receiving
Module, described Optical Receivers receives LED communication signal from LED group, controls obtaining after described LED communication signal processing
Instruction, and described control instruction is transported to microcontroller, described microcontroller generates socket switch according to described control instruction
Perform instruction, described socket switch is electromagnetic relay, and described electromagnetic relay is connected with the damping device of socket；
Described automatic curtain includes that core processor module, LED light receive circuit, memory module, key-press module, power protection
With level switch module, relay module；Described relay module includes relay circuit and travel switch, wherein said stroke
Switch is positioned on automatic curtain rail, is connected with the described relay circuit within controller by wire；Core processor leads to
The break-make crossing control relay realizes the selection of power supply wiring point, and described relay module includes 2 relays, passes through relay
Connect or disconnect and realize rotating and reverse of motor, thus realize the opening and closing of curtain；Described 2 relay circuits
Normally-closed contact with 2 travel switches is connected the most respectively；When curtain has fully opened or closes, system can automatically by
Power supply disconnects, the generation of pre-anticollision, and can send position signalling by the normally opened contact of travel switch to controller；Described
LED light receives circuit and receives the LED communication signal of LED illumination lamp group and be converted into control instruction and be transported to core processor；Institute
Stating power protection and include power protection part and level converting section with level switch module, described level converting section is to daily
220 V alternating voltages are converted to 5 V direct voltage outputs by electric main；Described power protection part is one and power supply
The electric fuse of input series connection；Described key-press module includes a free-standing button, is used for realizing system reboot and recovering initial
Arrange.
2. described in central processing unit connect optical key module, signal modulation control equipment, LED, automatic curtain, photo-detector,
Signal processing circuit；Described signal modulating equipment is responsible for modulation and is generated the original signal of telecommunication；Described LED lamp is monochromatic LED；
Described photo-detector is that visible light wave range responds preferable CCD electrooptical device；Described automatic curtain is the light of variable multiple
Learn camera lens；Described signal processing circuit adapts with photo-detector, for the process of video electrical signal, and determines light spot received
Shape, size and average received power；Being atmospheric channel between described searchlight and described automatic curtain, light source sends
Light is transmitted by atmospheric channel；Described power circuit connects central processing unit and field programmable gate array respectively；
Solar panel, mu balanced circuit, power-supply controller of electric and DC power-supply circuit it is provided with in described power circuit；Described optical key
It is provided with intelligent mobile terminal in module, based on intelligent mobile terminal operating system, designs key based on virtual serial port and send
The software module of intelligent mobile terminal, sends out key information by the software module of intelligent mobile terminal, and key information is by intelligence
The min-USB mouth output of energy mobile terminal；The key information exported, based on intelligent mobile terminal OTG function, through outward
Portion drives module loading to LED, is completed the transmission of key information by LED；
Bridgt circuit, is used for connecting USB interface of computer and light transmission circuit, will become from computer usb data signal
Change the signal being processed into the modulation of applicable radiating circuit, be changed being processed into usb data by the signal that reception circuit is sent here simultaneously
Signal gives computer；
Optical sender, for the signal processed through usb circuit is carried out coded modulation, modulated signal passes through again
Send to modulated light source after amplification so that it is send the visible ray light pulse signal being encoded signal of telecommunication modulation, after through optical antenna
It is transmitted in atmospheric channel；
Photoreceiver, sends, transmitting terminal, the light pulse signal come by optical antenna and converges to photoelectric detector PIN, will connect
The optical signal received is converted into the signal of telecommunication, and the ultra-weak electronic signal that conversion comes gives usb circuit after amplifying demodulation；
Described optical sender includes light source and driver and auxiliary circuit；Described auxiliary circuit includes light detection device, unglazed report
Alert circuit, automatic power control circuit and automatic temp. controlling circuit；During use, the signal of telecommunication is input to driver, described driving
Device is connected with light source, automatic temp. controlling circuit regulation and control light-source temperature, and described light detection device is arranged in light source range of exposures, and
Being connected with without optical alarm circuit, described light detection device and an automatic power control circuit constitute feedback electricity with driver after connecting
Road；
Described optical receiver circuit includes photodetector, amplifying circuit and signal processing circuit, described signal processing circuit bag
Include low noise preamplifier, main amplifier, equalizer, agc circuit；During use, the described digital optical signal through intensity modulated, light
Photodetector uses direct detection mode to receive optical signal at receiving terminal, and low noise preamplifier, main amplifier, equalizer are constituted
The linear passageway of photoreceiver, agc circuit connects between main amplifier and equalizer, completes optical electrical conversion, optical signal amplification
Signal level needed for judgement regenerative circuit.
A kind of indoor wireless CCD the most according to claim 1 controls automatic curtain, it is characterised in that described at a distance may be used
See that optical communication system equipment mainly includes transmitting terminal and receiving terminal；Transmitting terminal can use the modulation systems such as OOK, PPM, and light source will
The optical signal modulated is launched with the rule of high speed, light and shade change, uses high-power low beam divergence angle array LED as light
Source, owing to modulation rate is in 100 bit magnitudes, can use single-chip microcomputer to coordinate C++ software programming to carry out the soft or hard of transmitting terminal
Part designs, it is achieved the transmission of character string；Receiving terminal, uses CCD to use high frame frequency 100fps as photo-detector, hardware device
Above, high sensitivity, high-responsivity CCD camera；Camera shoots with frame frequency identical with light source, and design software pair
CCD camera carries out collection and the process of data, the rule of modulated signal is presented, and obtains corresponding gray value, thus complete
The transmittance process of one-tenth information, it is achieved the reception of character string；Described charging socket is arranged at the side of door close；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 indoor wireless CCD the most according to claim 1 controls automatic curtain, it is characterised in that described light source works
Wave band is HONGGUANG 650nm；Key to be sent is that TTL level signal, i.e.+5V represent high level " 1 ", and 0V represents low level
“0”；Described LED drive module includes PNP type paster audion S8550 and related peripheral device thereof, is used for realizing the signal of telecommunication
Conversion to optical signal；The device of described one one-to-many of optical key module；Optical key is based on single-chip microcomputer STC12C2052AD
A kind of transmitting terminal of design.
A kind of indoor wireless CCD the most according to claim 3 controls automatic curtain, it is characterised in that described transmitting is dynamo-electric
Road uses the red light-emitting diode (LED) light source as transmitter of 650nm.
A kind of indoor wireless CCD the most according to claim 4 controls automatic curtain, it is characterised in that described LED drives electricity
Road uses difference channel.
A kind of indoor wireless CCD the most according to claim 1 controls automatic curtain, it is characterised in that described low noise is preposition
Amplifier is broadband, low-noise amplifier.
A kind of indoor wireless CCD the most according to claim 6 controls automatic curtain, it is characterised in that
Described low noise preamplifier is trans-impedance amplifier.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610440692.0A CN105933061A (en) | 2016-06-20 | 2016-06-20 | Indoor wireless CCD controlled automatic curtain |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610440692.0A CN105933061A (en) | 2016-06-20 | 2016-06-20 | Indoor wireless CCD controlled automatic curtain |
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| EP1011083A2 (en) * | 1995-02-08 | 2000-06-21 | Peter A. Hochstein | Traffic information system using light emitting diodes |
| CN201094523Y (en) * | 2007-06-14 | 2008-08-06 | 李峰 | Electric curtain |
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