CN104467961A - Communication device - Google Patents
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- CN104467961A CN104467961A CN201310422631.8A CN201310422631A CN104467961A CN 104467961 A CN104467961 A CN 104467961A CN 201310422631 A CN201310422631 A CN 201310422631A CN 104467961 A CN104467961 A CN 104467961A
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Abstract
The invention relates to a communication device based on a luminescent source and a spectrum sensor. The communication device comprises a luminescent module, a light source modulation module, a spectrum sensing module, an electronic signal processing module, and a signal demodulation module, wherein the luminescent module is fixed at a position in the space and is in electrical signal connection with a light source regulator, the spectrum sensing module is electrically connected with the electronic signal processing module, and the electrical signal processing module is electrically connected with the signal demodulation module. In the device, light waves given out by a lighting device replace conventional communication media, so that the device can transmit large capacity of data timely at low cost with high signal-noise ratio; and the device can be added in conventional communication equipment or information processing equipment, receives waves with electromagnetism and replaces wireless data transmission in some electromagnetic sensitive places, and is particularly suitable for special places not being covered by radio wave or limiting use of the radio wave, like interior of a building or a medical monitoring room.
Description
Technical field
The present invention relates to communication and photoelectric technology, be specifically related to the visible ray mechanics of communication based on spectrum sensing, particularly utilize technology and the device of lighting device transmission information.Glow frequency and the light emission continuation time of lighting device is controlled by high frequency, on the visible ray that modulates information can be sent at lighting device, the characteristic spectrum of having modulated data message by spectrum sensor illumination apparatus again detects, the signal of telecommunication that demodulation obtains, namely can realize data transmission.The present invention can be used as supplementing of existing wireless and wire communication technology, for realizing low cost, Large Copacity, data communication in time by existing lighting apparatus, can not can cover or limit the Code in Hazardous Special Locations that radio wave uses by employing wireless electric wave, as in building, the information transmission of aircraft, steamer or medical monitoring indoor.
Background technology
Communication information service and data transmission more and more receive the concern of people, also form the market that one surpasses trillion.The current communication technology realizes mainly through wired or wireless mode: cable technology can transmit data in a large number, but needs cabling etc. to transform building; Wireless technology is just relatively convenient a lot, and after a segment base station establishes, the wide area that just can cover for wireless signal provides communication easily.RFDC to become in daily life the communication modes that more and more people rely on for counsel.But wireless signal can not effective covering building place that is inner or that intercepted by thick object, picture interior of building large-scale public place is as airport, exhibition center, warehouse, supermarket, library, underground environment is as underground parking, mine, as places such as train, aircraft, steamers in MOVING STRUCTURE, the application of these wireless systems is just extremely restricted, and many times just needs the mode of wired and wireless combination to realize reliably Large Copacity communication.The a large amount of universal worry also bringing people day by day to increase Contamination of Electromagnetic Wave ubiquitous in space of wireless telecommunications, and at some special occasions, as hospital monitor, inflammable and explosive environment etc. use also restricted to radio wave.Therefore, novel does not start by means of the mechanics of communication of radio wave the attention attracting more people, and wherein LED-based communication causes the concern of people more and more.LED along with the decline of cost and the perfect of industrial chain as the semiconductor illuminating light source of energy-conserving and environment-protective, start acceleration and enters in daily use.If illuminating LED just can be saved large number quipments and mounting cost as the carrier of communication and illumination, reduce energy resource consumption, simultaneously also safe especially, unnecessary electromagnetic wave can not be produced, avoid the injury to humans and animals.The Bytelight company of the U.S., the Samsung of Korea S, the Enterprises Universities Researches Union body of a lot of major company of Japan and university's composition all drops into a large amount of financial resource and material resource for researching and developing the communication technology based on LED illumination.These technology are based on white light for illumination LED light source, by additional equipment modulation LED glow frequency, light signal is accepted by means of Universal photoelectric transducer or cmos image sensing technology, realize signal receiving system by computing and eliminate the noise jamming such as bias light, having had application product at present.But it is complicated that these technology and product common drawback are computings, and signal affects larger by bias light; And adopting LED to add fluorescent material as another underlying factor of white light source is that LED sends gold-tinted of the generation that blue light and fluorescent material are stimulated etc. in time and asynchronous, which increase the difficulty of Mathematical treatment, and likely limit the transmission speed based on these class methods.
The present invention research light source characteristic particularly light emitting semiconductor device as on LED luminosity spectral characteristic basis, adopt the characteristic spectrum intensity of the spectrum sensor detection luminescent device with narrowband response, invent the communication device of a kind of feature based spectrum and spectrum sensor.
Summary of the invention
The object of this invention is to provide a kind of communication device realizing data transmission based on spectrum sensing and illuminant characterization spectrum, receive at low cost so that user is safe and reliable and transmits data.
For achieving the above object, the present invention has following technical scheme:
A kind of communication device of the present invention, comprises light emitting module, modulation of source module, spectrum sensing module, electronic signal processing module and signal receiving module.Light emitting module sends the light signal with characteristic spectrum, the characteristic spectrum signal that spectrum sensor detection light emitting module sends also is attached to by localizing objects, electronic signal processing module carries out electricity process to the signal of telecommunication that spectrum sensor obtains, light modulator regulates light source luminescent change, and by communications protocol, light emitting module positional information is modulated at light source and sends spectrally.Demodulator of PM signal PM is according to field data form regulation in communication protocol, and the signal of telecommunication through electric signal processing unit process spectrum sensing module obtained, by being carried in communication information demodulation contained on the signal of telecommunication of change, obtains the positional information of light emitting module.
Light emitting module has the spectrum of specific wavelength intensity distributions for sending, namely have characteristic spectrum;
Spectrum sensing module is used for the characteristic spectrum that probing semiconductor photophore sends, and spectral signal is converted to the signal of telecommunication;
Electronic signal processing module for the treatment of the signal of telecommunication transmitted by spectrum sensor, and sends follow-up signal demodulation module to.
Described light emitting module is fixed in a position in space, and spectrum sensing module just receives the light signal from light emitting module, and electronic signal processing module is electrically connected with spectrum sensing module.
Wherein, light emitting module is the device that can send light after powering up, and includes but not limited to light emitting semiconductor device.
Wherein, the luminous intensity of light emitting module light source or wavelength can by regulating electric current, voltage and changing, and this change is regular and controlled, can be used for transmission of information, and usual light source adopts LED, OLED but is not limited to semiconductor light sources.
Wherein, the light that light emitting module sends has characteristic spectrum, namely the light that this light emitting module sends has the characteristic strength distribution that can identify within the scope of optical wavelength, include but not limited to single features spectral line or multiple characteristic spectral line intensity, or the intensity relation of determination intensity between multiple characteristic spectral line.
Wherein, the characteristic spectral line intensity that light emitting module sends has along with the distance leaving light emitting module the spatial distribution determined, which constitutes the working range of communication device.
Wherein, spectrum sensing module is the photoelectric sensor with narrowband response, and its response curve is based on illuminant characterization line wavelength scope and intensity distributions thereof.
Wherein, the discrete device that spectrum sensing module is made up of the optical band pass filter of spectral wavelength selection function or photonic crystal and photoelectric sensor combines or integrated device, optical wavelength scope by filter or photonic crystal should match with the characteristic spectrum wave-length coverage of light source, and have higher transmissivity to spectrum in these wave-length coverages, the spectrum exceeded beyond these wave-length coverages f hardlyes pass through.
Wherein, photoelectric sensor comprises the photoelectric sensor photodiode of element semiconductor, compound semiconductor, organic semiconductor, semiconducting polymer's formation, phototriode, photo resistance, photoelectric multiplier, photocell, CMOS, CCD or charge injection transducer.
Wherein, the signal of telecommunication that electronic signal processing module will be obtained by spectrum sensing module, through computings such as amplification, digital-to-analogue conversions, and by the signal of telecommunication after computing, sends to follow-up locating module by wireless or wired mode.
Wherein, signal receiving module is made up of processor, completes the functions such as background elimination, signal data extraction, positioning analysis.
Wherein, light modulator regulates light source luminescent change, and by communications protocol, light emitting module positional information is modulated at light source and sends spectrally.
Wherein, the luminescence of light emitting module is under the effect of light source adjuster, its intensity or frequency or pulse duration change, and the mode that a kind of ratio is easier to realize is the pulse duration of modulated light source luminescence, namely modulates fluorescent lifetime interval and lighting time interval in the unit interval.
Wherein, light modulator by the geographical location information at light source place by person's intensity of modulated light source luminescence or frequency or pulse duration and transmission of encoding.
Wherein, demodulator of PM signal PM is according to field data form regulation in communication protocol, the signal of telecommunication through electric signal processing unit process spectrum sensing module obtained, by being carried in communication information demodulation contained on the signal of telecommunication of change, obtains the positional information of light emitting module.And the target that is decided to be these information and described locating module obtained combines relative to the positional information of light emitting module, obtains the absolute position being decided to be object.
Light modulator is changed by the luminescence feature of modulated luminescence module, as characteristic parameters such as luminous intensity, glow frequency, LED pulse duration and pulse durations, as shown in Figure 2, load the positional information of light emitting module, spectrum sensor receives these optical informations through ovennodulation, and be translated into the signal of telecommunication, obtained the positional information of these light emitting modules through the signal of telecommunication of electronic signal processing module by demodulator of PM signal PM demodulation, and information is passed to locating module.
Be realize one-way data transmission method described in upper, if two-way or communication will be realized, only need two covers or more said apparatus.As realized both-way communication, only need two groups of said apparatus, wherein one group of light emitting module, modulation of source module, spectrum sensing module, electronic signal processing module and signal receiving module are used for master data reception and send, its special light spectrum wavelength is positioned at visible wavelength range, and its light emitting module can be illumination luminescence component; Another group optical module, modulation of source module, spectrum sensing module, electronic signal processing module and signal receiving module are used for from digital received and sent, and its special light spectrum wavelength can adopt the non-visible such as infrared, to prevent the visual stimulus to user.
Owing to taking above technical scheme, the present invention has the following advantages:
1) the present invention adopts light signal as localized medium, can eliminate wireless signal electromagnetic interference, expands the scope of application of communication apparatus.
2) the present invention adopts the light emitting module with characteristic spectrum, and the light difference natural daylight of continuous distribution or other by its characteristic spectrum without this feature is come, and reduces the interference of other light source light spectrum.
3) the present invention adopts spectrum sensing module to measure the intensity that can obtain light emitting module characteristic spectrum simply, and beyond reducing characteristic spectrum, light is to the interference of surveyed intensity, reduces the noise of measured signal.
4) the present invention adopts miniaturized spectrum sensing module can be as integrated in the existing equipment such as mobile phone, removable computer with existing mobile device easily as the device of detecting light spectrum intensity.
5) communication device of the present invention can realize unidirectional or multidirectional communication easily.
6) communication device structure of the present invention is simple, flexible configuration, wide accommodation.This device both may be used for supplementing of communication system, also can independent construction system and network, for the communication of Code in Hazardous Special Locations.
Accompanying drawing explanation
Fig. 1: the spectral intensity distribution map of white light LEDs
Fig. 2: modulation intelligence schematic diagram
Fig. 3: the schematic diagram of block diagram of the present invention and embodiment one
Fig. 4: the schematic diagram of embodiments of the invention two
In figure: 1 light modulator; 2 light emitting modules; 3 spectrum sensing modules; 4 electronic signal processing module; 5 demodulator of PM signal PMs; 12 light modulator; 22 light emitting modules; 32 spectrum sensing modules; 42 electronic signal processing module; 52 demodulator of PM signal PMs.
Embodiment
The present invention just uses white light LEDs, as the communication device of light source, embodiments of the present invention are described.
Based on blue-ray LED, common adds that the synthesize white light LED luminescent spectrum of yellow fluorescent powder enters as shown in figure, obvious characteristic is exactly be in 430-500nm to have a stronger peak.The luminous intensity detection of general LED-based communication is all adopt Universal photoelectric transducer, detection be 400-800nm range of light intensity, this scope is according to the difference of photoelectric sensor response curve.General visible ray comprises the natural daylight deriving from the sun and is all within this scope.Therefore, if detect the light intensity of such wide region, therefrom take out the luminous signal of LED, be just easily subject to coming from the impact that other light source comprises natural daylight.This just proposes very high requirement to signal transacting.The Technology Ways that the present invention adopts detection to be positioned at 430-500nm wavelength band characteristic peak intensity just can reduce the impact of surround lighting on flashlight greatly, the accuracy that raising signal detects and reliability.Can notice, be equivalent to wave-length coverage corresponding to the place of 50% maximum intensity and peak width at half height (FWHM, Full-Width-Half-Maxium) wave-length coverage corresponding to is about 450-475nm, and the detection of spectrum sensing module of the present invention is just set in this section of wave-length coverage.Equally, to the LED of single chromatogram, determine that characteristic spectrum is convenient, the common common centre wavelength of single chromatogram LED as ultraviolet 380nm, blue 460nm, green 540nm, red 600nm, infrared 850 and 1350nm.Adopt corresponding spectrum sensing module just can measure these LED intensity in space, select half suitable peak money, intensity detection just can be made substantially not disturb by the luminescence of other wavelength LED.
Data message can pass to spectrum sensor by the method changing glow frequency and luminous interval duration, only needs to add light modulator in said device and demodulator of PM signal PM can realize.Light emitting module adds light modulator, changes frequency and the pulse duration of each LED pulse of light emitting module, as shown in the figure, the data message of light emitting module can be loaded on sent pulsed light.Spectrum sensor receives these optical informations through ovennodulation, and is translated into the signal of telecommunication of pulse, through the signal of telecommunication of electronic signal processing module by demodulator of PM signal PM demodulation, according to the communications protocol coded system set, obtains the information transmitted.
Fig. 3 for according to the electrooptical device designed by said method, comprises light emitting module, modulation of source module, the spectrum sensing module corresponding to light emitting module characteristic spectrum, electronic signal processing module, signal receiving module.Described spectrum sensing module is positioned at the side of light emitting module emergent light, and electronic signal processing module is electrically connected with spectrum sensing module;
The core light-emitting component of light emitting module adopts LED, and through the design of suitable luminous intensity distribution, the luminous energy that all light emitting modules or its combination are sent covers institute of institute locating area.Wherein, according to localizing objects thing and institute's overlay area difference, LED can adopt the light emitting semiconductor device from ultraviolet, visible ray, infrared all wavelengths scope, or the combination of different-waveband LED.
Spectrum sensing module adopts the spectrum sensor of band selector and photoelectric sensor integration packaging or integrated independent light spectrum sensor.Wherein band selector is the optics will the target wave band detected being needed to choose from incident light; The common wavelength band of such as blue light is at about 450nm, and this unit effect is exactly by the optical electivity of 450nm wavelength band out, and projection is to subsequent cell.Band selector adopts optical band pass filter (band-pass filter) herein.Photoelectric sensor utilizes photoelectric effect that light signal is converted to signal of telecommunication electronic device, alternative photoelectric sensing unit has following but is not limited to following several: photodiode, phototriode, photo resistance, photoelectric multiplier, photocell, CMOS, CCD or charge injection transducer CID(Charge Injection Device).The response curve of photoelectric sensor should match with the wavelength selected by wavelength selection unit, namely in the wave-length coverage selected by waveband selection unit, has response large as far as possible; As Ge base should be selected in short wavelength range, GaN base photoelectric sensor, and answer choice for use Si base photoelectric sensor at long wavelength range; The response curve of photoelectric sensing unit should with will by more homogeneous response in surveyed wave-length coverage.Described simple substance base photoelectric sensor, compound base photoelectric sensor, the material as PN adopts simple substance Ge, Si, the photoelectric diode of compound GaN, GaAs, CdS.
Modulation of source module can adopt PWM controller (pulse-width-modulator), is used for regulating light period and interval time.
The signal of telecommunication obtained by spectrum sensing module is converted to by after the signal of telecommunication of follow up device process or use, and can be sent to follow up device by wired or wireless mode by circuit by electronic signal processing module further; Electronic signal processing module usually realizes but is not limited to following functions: anti-phase, analog-to-digital conversion, comparator, interface, signal madulation and wireless transmission;
Signal receiving module adopts the processors such as MCU or CPU as hardware, in conjunction with software, strength signal and duration intervals are processed, the signal of telecommunication of the luminescent spectrum of corresponding light emitting module is obtained by computings such as background deduction, deconvolution, iteration, recurrence, again according to communications protocol and determine data format, mention the information being converted to and transmitting in the light signal of the signal of telecommunication.
Each module number in the present invention carries out flexible configuration as required.This device can also by part of devices cross-over configuration, as by spectrum sensing module loading on light emitting module, accept from being carried in the light signal of spectrum sensing module side, adding the storage of Internet protocol controller and read-write content, form the communication tool with bidirectional communication function and content transfer capability.Spectrum sensing module, electronic signal processing module, demodulator of PM signal PM can be integrated in mobile terminal as on smart mobile phone, panel computer, strengthen the communication function of these instruments.
Embodiment one
Fig. 4 a kind of white LED illumination device of the present invention realizes the electrooptical device of data communication as light emitting module and corresponding spectrum sensing module.White LED has two kinds, i.e. the recombined white light module of blue light+yellow fluorescent powder and RGB primitive colours LED formation.Here select and detect the spectrum sensing module of about 450nm blue spectrum transducer as correspondence.Client data sends and adopts infrared diode as light emitting module, and its wavelength, at about 850nm, is selected with 850nm spectrum sensor as spectrum sensing module.Light emitting module designs through geometric optics, main covering communication target area.Light modulator receives by setting said shank information, regulates three groups of light emitting module light periods and interval time by PWM controller.The light making light emitting module send in this way has been loaded information.The effect of demodulator of PM signal PM is according to communications protocol and determines data format, mentions the information being converted to and transmitting in the light signal of the signal of telecommunication.Spectrum sensing module receives these light signals comprising information, and is converted to the signal of telecommunication.Here the signal of telecommunication is equally also along with change in optical signal, and the data message of modulation has been contained in this change.These signals of telecommunication, after electronic signal processing module process, are received by demodulator of PM signal PM.Demodulator of PM signal PM, according to field data form regulation in communication protocol, will be carried in the signal of telecommunication demodulation of change, and obtain the information in the signal of telecommunication, thus obtain the data message loaded of light emitting module.
Embodiment two
Fig. 5 is the execution mode adopting communication device of the present invention to realize bidirectional communication function.Wherein one group of light emitting module, modulation of source module, spectrum sensing module, electronic signal processing module and signal receiving module adopt the configuration identical with embodiment one.This group equipment is used for realizing master data transmitting function, realizes the function of host computer.Other one group of light emitting module, modulation of source module, spectrum sensing module, electronic signal processing module and signal receiving module are mainly used for sending user and hold the required information sent, as address, request, data upload etc., realize transmitting slave computer function in other words from data.Cause unnecessary interference for reducing to user's visible light environment, light emitting module 22 adopts the infrarede emitting diode of 850nm wavelength, and spectrum sensor 23 also adopts response curve centre wavelength to be positioned at the infrared band spectrum sensor of 850nm.
As can be seen from the explanation of device of the present invention and example, the invention provides and realize data communication apparatus based on illumination and spectrum sensing technology, this method and device have simply, flexibly, and the features such as applied range.But more than illustrate and can not limit the enforceable scope of the present invention, the obvious or unconspicuous change that every professional person does on basis of the present invention, modify or improvement, all should be considered as not departing from Spirit Essence of the present invention.
Claims (9)
1. a communication device, is characterized in that: comprise light emitting module, modulation of source module, spectrum sensing module, electronic signal processing module and signal receiving module;
Light emitting module has the spectrum of specific wavelength intensity distributions for sending;
The characteristic spectrum signal that spectrum sensing module sends for detecting light emitting module, and spectral signal is converted to the signal of telecommunication;
Electronic signal processing module is used for the signal of telecommunication that spectrum sensing module transmits to process, and sends signal receiving module to;
Light modulator regulates light source luminescent change, and by communications protocol, light emitting module positional information is modulated at light source and sends spectrally;
Signal receiving module is according to field data form regulation in communication protocol, and the signal of telecommunication through electronic signal processing module process spectrum sensing module obtained, by being carried in communication information demodulation contained on the signal of telecommunication of change, obtains the positional information of light emitting module;
Described light emitting module is fixed in a position in space and is connected with the light source adjuster signal of telecommunication, and spectrum sensing module is electrically connected with electronic signal processing module, and electronic signal processing module is electrically connected with signal receiving module.
2. the communication device as described in right 1, is characterized in that: the light that this light emitting module sends has the characteristic strength distribution that can identify within the scope of optical wavelength.
3. the communication device as described in right 1, is characterized in that: the light source of light emitting module is semiconductor light sources.
4. the communication device as described in right 1, is characterized in that: the light source luminescent of light emitting module is under the effect of light source adjustment module, and luminous intensity or frequency or pulse duration can change.
5. the communication device as described in right 1, is characterized in that: modulation of source module by information by modulated light source luminous intensity or frequency or pulse duration and transmission of encoding.
6. the communication device as described in right 1, is characterized in that: spectrum sensing module is the photoelectric sensor with narrowband response, and its response curve is based on illuminant characterization line wavelength intensity distributions.
7. the communication device as described in right 1, is characterized in that: the discrete device that spectrum sensing module is made up of the optical band pass filter of spectral wavelength selection function or photonic crystal and photoelectric sensor or integrated device.
8. communication device as described in right 1, is characterized in that: the communication device realizing bi-directional communication function that described communication device is made up of two groups or more light emitting module, modulation of source module, spectrum sensing module, electronic signal processing module, signal receiving module.
9., as the communication device as described in arbitrary in right 1-8, it is characterized in that: wherein one group of light emitting module, modulation of source module, spectrum sensing module, electronic signal processing module, signal receiving spectrum that module uses are positioned at invisible light wave band.
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| CN201310422631.8A CN104467961A (en) | 2013-09-16 | 2013-09-16 | Communication device |
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| CN201310422631.8A CN104467961A (en) | 2013-09-16 | 2013-09-16 | Communication device |
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| CN109951230A (en) * | 2019-04-08 | 2019-06-28 | 格利尔数码科技股份有限公司 | Medical health system based on visible light communication |
| CN110868254A (en) * | 2018-08-28 | 2020-03-06 | 杭州萤石软件有限公司 | Monitoring equipment control method and system |
| CN111213329A (en) * | 2017-10-12 | 2020-05-29 | 黑拉有限责任两合公司 | Communication system for a motor vehicle |
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