CN102164436A - Self-adaptive illumination system based on visible light communication receiver - Google Patents
Self-adaptive illumination system based on visible light communication receiver Download PDFInfo
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- CN102164436A CN102164436A CN2011100422584A CN201110042258A CN102164436A CN 102164436 A CN102164436 A CN 102164436A CN 2011100422584 A CN2011100422584 A CN 2011100422584A CN 201110042258 A CN201110042258 A CN 201110042258A CN 102164436 A CN102164436 A CN 102164436A
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Abstract
The invention provides a self-adaptive illumination system based on a visible light communication receiver. An optical receiver of a visible light communication system is used for receiving data and meanwhile used for detecting illumination effect, the detection data can be transmitted to an illumination lamp through an optical transmitter of the visible light communication system or other communication transmitters, and the illumination lamp adjusts the light source output power according to the detection data and enables the light source output power to achieve the standard set by a light using position, so that the illumination effect can be dynamically stabilized under the condition that the illumination conditions and the environmental temperature are changed. Meanwhile, the illumination lamp also can be taken as the optical transmitter of the visible light communication system, which is used for transmitting data.
Description
Technical field
The invention belongs to the intelligent lighting field, what be specifically related to is a kind of self adaptation illumination adjusting device that utilizes the optical receiver of visible light communication system as surround lighting and illumination light intensity detector.
Background technology
Illumination is that daily life, industrial production and scientific experiment etc. are necessary, and there is different requirements in brightness, spectrum, zone etc.; Electric consumption on lighting occupies sizable ratio in whole electric load.Along with convenience, the suitability of different occasions to illumination, the particularly requirement of strong day by day energy saving, and the maturation of LED on lighting technology and covering universal, various communication networks, the condition that real intelligent illuminating system has possessed further investigation and progressively implemented.The scope that intelligent illuminating system is contained and the degree of depth still do not have standard definition, can make a general reference any system that can carry out certain automation, sequencing, remote control to traditional lighting device (comprise complicated, a large amount of), its target is varied, the convenient and energy-conservation Just One Of Those Things that requires.
Though the general lighting light fixture refers to final complete illuminating product, such as having comprised lamp socket, lampshade etc., and light source refers to direct luminous component, and as bulb, LED, it is general to compare in this patent narration, does not add differentiation and does not have substantial effect.Lighting structurally has distributed and centralized, and distributed is to be made of the light source that comparatively disperses on a plurality of spaces of unified control, and centralized then is to be made of unified a plurality of light sources that concentrate in together of controlling.The type of light source comprises incandescent lamp, fluorescent lamp and LED etc.Have reason to believe that following more meetings of LED illumination meeting present with distributed.
The self adaptation illuminator can be thought a kind of in the intelligent lighting technology, and what emphasize is can be according to specific requirement existing dynamic auto adjustment of contrast obvious results fruit under the environment that changes of user, its main target be stablize, comfortable visual effect and energy-conservation.Typical case's application scenarios is office, workshop, household etc.It can survey the effect and the variation of natural lighting and artificial lighting, comparatively stable illuminating effect with this parameter and user's request compares then, its difference is delivered to the adjustment or the control unit of lighting by certain means of communication, adjustment unit is realized the isoparametric adjustment of illumination power output is met customer requirements up to illuminating effect.
The self adaptation illuminator is the closed control loop of a routine, but because in an illuminator compass of competency, office such as typical medium-sized area, the self-adjusting target of throwing light on not is to be to realize uniform illumination in the whole zone, but at being in the same area on the diverse location different user to the different requirements of illumination, and the illumination zone of the lighting of a plurality of distributed layings can mutually cover, so the model of self adaptation illuminator some complicated multi-input multi-output system often again.
Self adaptation illuminator basic comprising can be summed up as: one, can adjust the lighting of exporting illumination parameter, and the output illumination parameter may comprise power/luminous flux, direction of illumination, irradiation area, colour temperature etc.; Two, can survey photoelectric sensor with optical position (being the target location of illumination) lighting effect, can survey illuminance, spectral distribution etc. as required; Three, can contrast difference, and can form adjustment information according to difference with light demand and actual illumination effect; Four, can between photoelectric sensing unit and lighting, transmit the communication unit (also can directly be connected) of adjustment information with lead.
The self adaptation illuminator at lighting can be all types of light fixtures, related means of communication can be any suitable communication medium, and the photodetector used to the detection of lighting effect, it generally is conventional photoelectric sensor, as photo resistance, phototriode, perhaps photodetection module, instrument etc. also can directly utilize the array image sensor of camera etc.Photodetector can be converted to light energy the electric flux of being convenient to measure, and is converted to luminous power lumen (LUM) as electrical power watt (W).Since the metering condition of photometry, unit of measurement and each other concern more complicated, in this patent is described, generally use luminous intensity and come general term, this is not had special influence.The unit of general optical-electrical converter responsiveness is Acm
2W
-1(ampere. centimetre
2/ watt), perhaps A/Lux (ampere/lux), promptly illuminance is converted to output current.And generally characterize with voltage amplitude through final output behind the amplifying circuit: V/lux (volt/lux), promptly illuminance is converted to voltage, therefore can obtain the measured value of illumination by the voltage of measuring output.The luminous power that illumination is on the unit are to be accepted is the characterized by techniques of " brightness " of common general term.
The visible light communication technology is a kind of of light wireless communication technology, it mainly is the high-speed switch characteristic of utilizing LED solid state light emitter (perhaps other can realize the light source of very fast control), with data it is modulated, in illumination, realize the short distance transfer of data of given pace, promptly throw light on communicate by letter can dual-purpose.The main composition of the optical sender of visible light communication system is LED and led drive circuit, modulation circuit, and the main composition of optical receiver is optical system, photoelectric sensor (detector) and signal processing circuit.
The self adaptation illuminator generally adopts photodetector independently to detect the effect of illumination, and needs in addition independently transmission medium feedback adjusting parameter.This patent proposes to utilize the optical receiver of visible light communication system to detect illumination light and ambient light intensity in communication, is obtained from the feedback adjusting signal of adaptating lighting, and feedback signal can be sent to lighting by optical sender.
Summary of the invention
Because the service band of optical receiver is a visible light, obviously the photoelectric sensor of visible light receiver not only can detect the light signal strength of optical sender emission, also can detect or the Evaluation Environment light intensity.In fact, when optical sender was not worked, the background signal of the photoelectric sensor of optical receiver output promptly was the result to the surround lighting response.The background signal here is meant that except the light signal of the optical sender emission that receives object all fall into the summation of the light signal response of optical receiver response wave band scope, comprises the light etc. of the optical sender emission of natural daylight, common illumination light, other non-reception object.
Basic composition of the present invention unit is: the visible light communication transceiver of lighting (can doublely make the visible light communication transmitter), lighting controller (can have the visible light communication receiver concurrently), usefulness optical position.Miscellaneous equipment or communication network that related unit has the miscellaneous equipment that is connected with visible light communication transceiver with optical position or communication network, is connected with the lighting controller, and the visible light communication transceiver of other position of the same space, other lighting etc.
The present invention can have multiple application scenarios, but the most representative is that self adaptation illuminator and visible light communication system are a unified integral body, lighting promptly is the optical sender of visible light communication system, promptly be the photodetector of self adaptation illuminator with the optical receiver of the visible light communication system of optical position, and between them when carrying out routine data communication, can transmit adaptive dim signal.The course of work following (is example with the LED lighting):
The controller of lighting is in PWM (pulse width modulation) mode, the driving LED lamp luminescence, usually the pulse frequency of PWM is constant, under the situation of driving current constant, luminous power and the pulse duration of PWM (duty ratio) are proportional, this is the dimming mode that generally adopts of present LED light fixture (can select to adopt other dimming mode to other light fixture, as voltage etc.).Because people's visual persistence, human eye can not felt the flicker of light of impulse form.The PWM dimming mode is mainly realized large-scale dimming function, and such as the variation at surround lighting: still be the situation such as whether open of other light fixture in night, the same lighting space daytime.Also can change the luminous power of output by regulating drive current, but change can exceed the best effort scope of LED on a large scale.Recommended current and the temperature of LED are closely related, therefore generally can be along with the change of working temperature is carried out suitable adjustment to drive current.LED when optical efficiency decays to some extent, also uses drive current regulated and keeps the constant of its luminous power and colour temperature as time passes in addition.Adaptive dim signal may comprise all the demand.
When the LED light fixture is used as optical sender simultaneously, data have multiple to radiative modulation system, one of them is simple pulse position modulation method, promptly under fixing clock pulse frequency, with transmitted pulse representative data 1, with no pulse representative data 0, and the width of pulse still can change according to the mode of PWM.Such mode is behind the data process scrambler of transmission, and 0,1 ratio that occurs is close, and lighting still can be adjusted brightness according to the PWM mode in communication.Though can not use LED with 100% time efficiency during communication, can come the compensation integral illuminating effect by the power of increase unit LEDs or the number of LED.Other modulation system comprises pulse amplitude modulation, and this modulation system is actual to be under the situation of illumination pulse frequency and constant width, adjusts the size of drive current.This can adopt in based on the illuminator of communication, but in the system based on illumination, might not be preferred version.
Can receive light signal in any visual field, in the response wave band with the visible light receiver of optical position, ambient light signal is actually background noise when communication, when there not being the communication data transmission, when perhaps only selecting the illumination work pattern, the light signal that is received with the visible light receiver of optical position is the illumination pulse that superposes on the basis of more constant ambient light intensity, to its amplify, after synchronous acquisition etc. handles, can calculate the mean intensity in one-period of environment light intensity and illumination pulse respectively, and total average luminous intensity.The overall average luminous intensity is the illuminating effect that arrives of visual response just.Processor with the visible light receiver of optical position compares with these data and a reference value, then according to its difference, with certain algorithm, PI (proportional integral) control algolithm such as routine, obtain the numerical value of an adjustment, and with this numerical value by the optical receiver that sends to the lighting controller with the visible light communication transmitter of optical position.The contrast reference value generally have two kinds optional, the one, according to the fixed value that the visual demand of routine is determined, another is according to using up the value that the user of place manually sets.
After the controller of lighting receives the dim signal of using the light position feedback, the width of PWM is dynamically adjusted, just can under the situation that ambient lighting changes, realize stable illuminating effect adaptively.
When illuminating lamp has communication data when transmission, no matter adopt any modulation system, can both detect average lighting effect with the optical receiver of optical position, and the data that will need to adjust feed back to the lighting controller, carry out adjustment by the lighting controller.And to the obtaining of data, according to the modulation system of taking.As above-mentioned pulse position modulation mode, can't substantial influence be arranged the demodulation method to data because adjustment brightness has changed pulse duration.
With the feedback information of optical position to the illumination adjustment, also can adopt other media to be delivered to the lighting controller, promptly can adopt any other communication mode easily to the uplink communication of lighting with optical position, such as the wireless or cable LAN that adopts extensive covering, and rely on power line etc.
With the feedback information of optical position to the illumination adjustment, if may be subjected to the reflections affect of lighting institute led pulse when adopting the VISIBLE LIGHT EMISSION machine to send to the lighting controller, can solve by communication protocol, such as the working method that adopts timesharing, i.e. the intermittence in short-term of regulation one-period in the middle of continuous illumination pulse, specialize in the optical sender of using up the place and send feedback information.As long as this time is enough short, just can not influence the effect of illumination, also can not influence the transmission of communication data.
Description of drawings
Fig. 1: the self adaptation illuminator based on the visible light communication receiver is formed and the operation principle schematic diagram, and the top is the part related with lighting unit, and bottom is the part that the light Data Receiving is associated with light intensity detection unit.Decide on application requirements the position of some functional module, also can correspondingly adjust to the top such as 1-6 and 1-8 module, is integrated in the lighting.
Fig. 2: tunable optical, can be used as the basic comprising of the lighting of optical sender, controller has data transmit-receive/propagation function concurrently.The entity structure of VISIBLE LIGHT EMISSION machine is difference to some extent, but similar functional structure is all arranged: control, modulation, driving.
Fig. 3: the general work of visible light receiver constitutes, and has light intensity detector, and signal processor has data transmit-receive/propagation function concurrently.
Fig. 4: based on one of the operative scenario schematic diagram of the self adaptation illuminator of visible light communication (surround lighting has comprised the natural daylight from window), the integrated communication modules such as WLAN of routine in the similar computer have been supposed to integrate among the figure with the visible light communication transceiver and the computer of optical position.Its transceive data and dim signal can such as Ethernet interface, WLAN mouth, ZigBee etc., also can transmit by the VISIBLE LIGHT EMISSION machine by the various interface transmission of computer.
Fig. 5: data transmission, reception, light modulation, luminous intensity detect the sequential relationship diagram of sampling point, and waveform only is signal usefulness among the figure, and not exclusively represents real signal shape.
Fig. 6: the TDD mode of lighting (VISIBLE LIGHT EMISSION machine), the short gap of mourning in silence provides comparatively pure uplink communication opportunity, and optical receiver can utilize this gap to upload information to lighting after synchronously.
Embodiment
The present invention describes specific implementation process with application scenarios shown in Figure 4.Its top part is based on lighting (4-3), virtual on ceiling, its following part is the light area, and is virtual preceding at a desk (4-2), based on an integrated notebook computer (4-1) of visible light communication transceiver, the next door has a fan window (4-5) to introduce natural lighting.Though this figure can not describe various actual scenes fully, but the representativeness that has had enough descriptions core technology of the present invention, and can thoroughly do not destroyed because of the intervention of other factors, such as, when if there is other lighting in periphery, its influence can be used as surround lighting to be considered, and when having other visible light communication transceiver, and the duplex of similar conventional wireless communication, multiple access multiplexing mode can guarantee that it still can work.
The visible light transceiver that computer (4-1) is integrated, as the integrated Ethernet of various notebook computers (Ethernet) card, WLAN (WLAN (wireless local area network)), IrDA (infrared data host-host protocol), Bluetooth (bluetooth) module etc., and have similar management function and data exchange capability.
Lighting (4-3) itself promptly is the transmitter of visible light communication, in its controller same integrated the optical receiver of visible communication (4-4), suppose the communication capacity that it can have plurality of optional and select (must) simultaneously, can be connected to Ethernet by twisted-pair feeder such as it, be connected to local area network (LAN) by WLAN, be connected to particular network by bluetooth or ZigBee (sensing and control communication network protocol), and these communication networks can and computer (4-1) link together.
The basic comprising of lighting/optical sender (4-3) as shown in Figure 2, controller (2-1) can be selected to receive data by the visible light receiver and still receive data by other transport communication module, the data that send are by modulator (2-2) modulation back (such as carrying out pulse modulation), deliver to driver (2-3) and data-signal are become power signal to drive light fixture (2-4) luminous.
For the LED light fixture, driving output is electric current.The size of electric current is relevant with the Output optical power of LED, but a best effort scope is arranged.Led light source can be subjected to the influence of working temperature and time and decay, and therefore can carry out suitable compensation by regulating drive current.Can adopt constant current drives LED luminous, just can't realize dimming function like this.Usually all adopt the PWM mode to carry out light modulation to the LED light fixture, the electric current that is about to driving LED becomes the electric current of pulsed, and pulse duty factor has just determined the average power of led light source output.Therefore, the adjustment to the led light source Output optical power can be summed up as: the thicker adjustment on a large scale of PWM mode and the meticulous adjustment of moment of drive current mode.Controller (2-1) is if received illumination power adjustment information and required enforcement adjustment, and one of method promptly is direct controlling and driving device (2-3), by the duty ratio of adjusting drive current the output average light power of light fixture is changed.And if because long-term use or ambient temperature increase the weak of the luminous power output that causes, so just compensate at its output current of increase by driver (2-3).Ambient temperature can be measured by the temperature sensor that is arranged in the light fixture, and the output attenuatoin of luminous power can be measured the illumination peak value of pulse by the visible light receiver and change and pass judgment on.
The integrated VISIBLE LIGHT EMISSION machine structure of computer (4-1) is similar to Fig. 2, but because it might not require to have illumination functions, its power output and spectrum can be selected with lighting different, can normally receive as long as guarantee the visible light receiver (4-4) that is integrated in the lighting.
The basic comprising of the visible light receiver that computer (4-1) is integrated as shown in Figure 3, optical system (3-1) can converge to the light in the visual field on the photodetector (3-2), after photoelectric detector is converted to the signal of telecommunication and process amplifier (3-3) amplification with light signal, one the road delivers to demodulator (3-4) carries out demodulation to the modulation signal that receives, and through after the signal processing (3-5), the data that obtain receiving.Power-sensing circuit (3-6) is delivered on another road, mainly is received signal and background light intensity are measured, and the value of measurement is delivered to signal processing unit, obtains final assessed value.Wherein, photoelectric detector is operated in visible light wave range, can be the photodetector or the photodetector polynary, the face battle array of unit.
It is identical that the basic comprising of the visible light receiver (4-4) in the lighting and Fig. 3 describe, but its parameter select and will be complementary with the integrated VISIBLE LIGHT EMISSION machine of computer (4-1), such as emission spectrum will with the Spectral matching of photodetector.
At application scenarios shown in Figure 4, concrete operation principle of the present invention can be by Fig. 1 and Fig. 5 explanation.In Fig. 1, the lighting VISIBLE LIGHT EMISSION machine (1-1) of holding concurrently is integrated with a visible light receiver (1-2), and wherein (1-3) is its photodetector.Optical sender (1-1) is according to the clock frequency shown in (5-1) among Fig. 5, i.e. the tranmitting frequency of light pulse is luminous, and this frequency is hundreds of KHz when illumination is used generally, and can be designed to the MHz magnitude double doing as required when communication is used, even higher.Selecting one of data-modulated mode be pulse position modulation, and during setting data position 0, the no pulse transmission during data bit 1, has pulsing, as among Fig. 5 shown in (5-2).Selecting intensification modulation is the PWM modulation, changes average output power by the duty ratio of regulating output optical pulse.When brightness of illumination need not to regulate, the width of pulse was a steady state value.What (5-2) illustrated among Fig. 5 is two kinds of pulse durations, and the illumination power output will change during the explanation.
Photodetector (1-4) with the visible light receiver (1-5) of optical position is surveyed the light that optical sender sent.At the signal that sent of figure (5-2), the receiver actual reception to class signal be similar to waveform shown in (5-4) solid line, this waveform is that the illumination pulse signal that receives is superimposed upon on metastable environment (background) light signal shown in (5-4) dotted line.This signal can obtain two paths of signals behind receiver, the one tunnel is the communication data after the demodulation, and another road is detected luminous intensity.It is similar that obtain and the conventional signal of communication of communication data handled means, simply can shown in (5-5), the bias light signal be considered as noise by setting certain threshold value, to the signal that receives adjudicate, after synchronous etc. the processing, the data that obtain estimating.And to overall light intensity signal P
A(t) detection is to draw according to the mean value of received signal intensity in the certain hour section, and this, short wanting can comprise several pulse periods in time interval, and is long then the pace of change of looking human eye vision inertia and bias light might not require very strictness to this.But, then need to set the short relatively time interval if be used for the illumination of special installation and higher stability requirement is arranged.In this process because optical receiver has the ability of resolutions, synchronizable optical pulse, so can be easily with the power P of light pulse
0(t) with the power A of surround lighting
0(t) distinguish the calculating of coming relatively, one of simple way is in the position that captures each light pulse and obtains instantaneous power P
p(t) sampling to background signal within the pulse spacing in back (stack of instantaneous radiation pulses power and bias light power), can be by the average power A that on average obtains surround lighting of a plurality of such sampled values
0(t).Illustrate a kind of sampling mode in Fig. 5 (5-8), on the T1 between the signal pulse, T2, T3 point, gathered background signal respectively.So just can roughly obtain P
0(t)=P
P(t)-A
0(t).P
0(t) can be as feeding back to one of signal of lighting, regulate drive current instantaneous value.
In communication process, there is dual mode to adjust the brightness of illumination, the one, manual adjustments, by manually setting as required with optical position, the 2nd, automatic adjusting is according to the variation of the detected light of optical receiver.This dual mode can be realized by the setup unit (1-7) that is integrated on the optical receiver, such as manual adjustments is to set by potentiometer, set point is delivered to optical receiver by the ADC conversion, perhaps by a knob and a simple application program virtual on the computer setting data is delivered to optical receiver.Automatically adjusting then is according to a reference data R who sets in advance
NReceiver is exported detected illumination power P
A(t) and R
NCompare, the difference e of contrast (t) is the foundation of regulating illumination.Have multiple algorithm that this difference is converted to and adjust parameters u (t), wherein one of simple algorithm is positive and negative according to difference the most, with fixing step-length illumination is increased or subtract adjusting accordingly, and algorithm is as follows:
This is a kind of nonlinear control method of simple relay system.Adjust the speed of the setting decision adjustment of step-length, if the variation of ambient lighting and unhappy, so little adjustment step-length can meet the demands and have stablizing effect preferably.
Another is complicated a little, but can make regulate than faster, level and smooth algorithm be control system PI commonly used (proportional integral, 1-8) algorithm:
K wherein
PBe proportionality coefficient, T
IBe integration time constant, u (0) is an initial value.Choosing of these parameters has the bigger degree of freedom, is dependent on practical application effect and experience.
Adjust parameters u (t) and P
0(t), P
A(t), A
0(t) all can send to the controller of lighting by communication transmitter (1-9).Communication transmitter is not limited to the visible light communication transmitter in the reality, therefore two kinds of delivering paths in Fig. 1, have been drawn, article one, be to pass the signal to illumination light transmitter (1-1) by (1-11), other one (1-10) passes the signal to the visible light receiver (1-2) that is integrated in the lighting controller by the visible light communication transmitter, and then passes to the controller of lighting.The controller of lighting is adjusted the illumination power output according to u (t) value.Like this, just formed the closed control loop that communication is held concurrently in a kind of self adaptation illumination.(5-2) in Fig. 5 promptly shows the irradiates light pulse change when lighting power is adjusted, and the width of former illumination pulse is shown in (5-6), received in the supposition of moment of t=4 and adjusted instruction, and the width adjustment of pulse has been arrived the width shown in (5-7).So, the average light power of output is with corresponding minimizing.The corresponding bias light with optical position does not have anything to change behind t＞4 in the diagram, illustrates that this adjusting is not according to the reference value adjustments of setting, but according to manual adjusting.If because the automatic adjusting of making has taken place to strengthen in surround lighting, so among Fig. 5 the output effect correspondence of (5-4) solid line will to be (5-4) dotted line in the moment of t=4 detect to raise changes, the u of feedback calculation (t) is worth then, force the average power of illumination pulse to reduce, i.e. pulse narrowing in (5-2).
In fact, can look lighting fully is optical communication base station, and is an optical communication terminal with the visible light transceiver of optical position.In order to guarantee not to be subjected to the light of lighting emission in the interference that causes with the optical position reflex time with the signal that the visible light communication transmitter of optical position sends, adopting the method for time division duplex will be a kind of valid approach, promptly throw light on or during descending transmission data when lighting, visible light communication transmitter with optical position is not worked, and with the visible light communication transmitter uplink data sending of optical position the time, lighting do not work (perhaps weakening the illumination power output).For the stability that guarantees to throw light on, up call duration time can be provided with short, does not make and causes illumination flicker to get final product.Fig. 6 shows this time-division working method, and in (6-1) time section, promptly T1 is between the T2, lighting work, and in (6-2) time section, and promptly T2 is between the T3, sends data with the visible light communication transmitter of optical position.T2 gets the 10ms magnitude to the time interval of T3 just can not cause illumination flicker, as for the cycle of inserting, depends on up data volume, and iff shining adjustment information for feedback light, this can obtain littler at interval, and the insertion cycle also can be obtained longer, as 100ms.When do not need to throw light on too much daytime (lighting send light pulse can be very narrow), this time allocative decision can be looked up-downgoing transmission demand data and corresponding change fully, only otherwise making light visually show flicker gets final product.The another one use of this scheme is when sending uplink information, if lighting is not luminous, the visible light communication receiver of using optical position so just can be in this time interval the intensity A of complete measure ambient light
0(t).
In this patent, do not limit lighting (hold concurrently visible light communication transmitter) and set up the visible light communication receiver in communication link, the lighting controller and set up communication link with the visible light communication transmitter of optical position with the visible light communication receiver of optical position.They can set up communication link with the visible light communication transceiver of other position, other function respectively, the illumination of lighting is measured and can form the closed-loop path with the adjustment of lighting with the visible light communication receiver as long as guarantee.
Core of the present invention is the power of coming the measuring light photograph with the receiver of visible light communication.If the transceiver of visible light communication is born the transmission and the receiving function of illumination and illumination detection and feedback signal simultaneously, be equivalent to two kinds of effects of a kind of system so, made full use of the function of lighting.
Because this type systematic can be associated with PERCOM peripheral communication and other embedded device, so the function selecting of each module has the property of collocation, is not limited to relation described above.
Though the light-dimming method during above-mentioned patent is described only is example with PWM, data modulation method only is example with the pulse position modulation, and other light modulation, modulator approach are used for not existing substantial obstacle herein.
Though above-mentioned patent is described the adjusting that only only limits to contrast bright power output, but under the situation of conditions being possessed, have the ability of regulating range of exposures, direction of illumination, colour temperature such as lighting, still can easily realize the dynamic intelligent illuminating system of controlling of various dimensions parameter according to above-mentioned technology so.
Claims (6)
1. self adaptation illuminator based on the visible light communication receiver:
A) lighting is subjected to the control of lighting controller, realizes the adjusting of illumination power output;
B) integrated visible light communication receiver or other communication transceiver (as WLAN, ZigBee etc.) in the lighting controller, and can carry out exchanges data with it;
C) the visible light communication receiver with optical position receives the light signal that the visible light communication transmitter is launched, and measures intensity of illumination simultaneously;
D) the visible light communication receiver with optical position compares the illumination intensity value of measurement and the level of setting, form illumination according to specific control algolithm (as the PI algorithm) and adjust signal, and with this signal by with the visible light communication transmitter of optical position or with the lighting controller in can set up communication link communication transceiver (as WLAN, ZigBee etc.) send to the lighting controller;
E) the lighting controller is adjusted signal according to the illumination that is received, and adjusts the luminous power of lighting.
2. according to claim 1 based on lighting and controller thereof in the self adaptation illuminator of visible light communication receiver:
A) structure of lighting can be distributed or centralized, can be made of one or more light source;
B) communication transceiver in the controller can be connected to the communication network swap data;
C) when the light source of lighting had the ability that realizes data-modulated, the controller data available was modulated the light that lighting sent, and realized that visible data sends.
3. according to claim 1ly by optical system light signal in the visual field is converged to photodetector based on the visible light communication receiver in the self adaptation illuminator of visible light communication receiver, photodetector is converted to the signal of telecommunication with light signal and reaches signal processor.
4. according to claim 1 based on the visible light communication receiver in the self adaptation illuminator of visible light communication receiver with optical position:
A) can embed or be connected to that (in computer) carries out exchanges data on the miscellaneous equipment with the visible light communication transmitter;
B) when not having the illumination of lighting or in the intermittence in short-term of illumination, the power of ambient light;
C) if the only impulse form that lighting is launched detects a little less than the instantaneous light intensity during launching light pulse so, and in the intermittent time of emission light pulse, the ambient light power; From instantaneous light intensity, deduct the light intensity that environmental light intensity obtains the irradiates light pulse;
D) by the average intensity total in the certain hour to the average acquisition of environmental light intensity and instantaneous light intensity;
E) light intensity of irradiates light pulse and environmental light intensity send to the lighting controller by the communication transceiver with optical position together;
Employed setting level comes from determined value or the manual input value of inserting in advance when f) level of the average luminous intensity value measured and setting being compared.
5. according to claim 2 based on lighting and controller thereof in the self adaptation illuminator of visible light communication receiver:
A) the average output of the duty ratio control luminous power by regulating output optical pulse;
B) control the instantaneous output of luminous power by the mode of regulating drive current;
C) realize that with pulse modulated mode posting of communication data carry simultaneously.
6. according to claim 1 based on lighting and controller thereof in the self adaptation illuminator of visible light communication receiver, between continuous irradiates light pulse, insert pause interval in short-term periodically, signal is adjusted for light signal, the particularly illumination of launching with the VISIBLE LIGHT EMISSION machine of optical position that its visible light receiver receives other visible light communication transmitter emission in this gap.
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| CN102625509A (en) * | 2012-03-09 | 2012-08-01 | 郭丰亮 | Intelligent lighting system based on LED (Light Emitting Diode) visible light communication |
| CN102752930A (en) * | 2012-06-28 | 2012-10-24 | 无锡莱吉特信息科技有限公司 | Intelligent LED (light-emitting diode) illumination system |
| CN103052217A (en) * | 2012-12-14 | 2013-04-17 | 重庆恒又源科技发展有限公司 | LED (light emitting diode) control method and system based on ambient light detection technology |
| CN103052218A (en) * | 2012-12-14 | 2013-04-17 | 重庆恒又源科技发展有限公司 | Control method and system of multiple LED (Light Emitting Diode) lamps |
| CN103312412A (en) * | 2012-03-06 | 2013-09-18 | 财团法人工业技术研究院 | Visible light communication transceiver and system |
| CN103368648A (en) * | 2012-04-01 | 2013-10-23 | 深圳光启创新技术有限公司 | Visible light communication system based on time division multiple access |
| CN103369773A (en) * | 2012-03-29 | 2013-10-23 | 中国计量学院 | Wireless communication intelligent household system based on LED illuminating lamps |
| CN103491667A (en) * | 2013-01-31 | 2014-01-01 | 吴嘉懿 | Illumination lamp |
| CN104348545A (en) * | 2013-07-26 | 2015-02-11 | 中兴通讯股份有限公司 | Multiple-input multiple-output visible light emitting device, method thereof, receiving device, and method thereof |
| CN104467966A (en) * | 2014-12-31 | 2015-03-25 | 中国人民解放军信息工程大学 | LED modulating method and system based on visible light communication |
| CN104767566A (en) * | 2014-01-07 | 2015-07-08 | 中兴通讯股份有限公司 | Dimming method and device for alleviating inter-frame flicker |
| CN104980217A (en) * | 2015-06-19 | 2015-10-14 | 邹骁 | Visible light communication system and method, and associated device |
| CN105179959A (en) * | 2015-06-10 | 2015-12-23 | 金陵科技学院 | Adjustable illumination communication device and system |
| CN106027161A (en) * | 2016-05-24 | 2016-10-12 | 中国人民解放军信息工程大学 | Visible light communication control method, device and system |
| CN106357331A (en) * | 2015-07-16 | 2017-01-25 | 北京全电智领科技有限公司 | Visible-light communication method and visible-light communication system on basis of light intensity perception |
| US9648701B1 (en) | 2015-12-31 | 2017-05-09 | General Electric Company | Multi-functional optical sensor for indoor lighting systems |
| CN106888056A (en) * | 2017-03-29 | 2017-06-23 | 西安易朴通讯技术有限公司 | The power regulating method and device of visible light communication |
| CN107635100A (en) * | 2012-12-27 | 2018-01-26 | 松下电器（美国）知识产权公司 | Information communicating method |
| CN109981170A (en) * | 2019-04-12 | 2019-07-05 | 清华-伯克利深圳学院筹备办公室 | A kind of radio optical communication system and method |
| CN110138457A (en) * | 2019-04-10 | 2019-08-16 | 南京南邮信息产业技术研究院有限公司 | Has the underwater visible light communication system of condition monitoring and operating condition adaptively |
| CN110312290A (en) * | 2019-08-09 | 2019-10-08 | Oppo（重庆）智能科技有限公司 | Communication network switching method, device and computer readable storage medium |
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| CN112272434A (en) * | 2020-10-30 | 2021-01-26 | 福州大学 | Instantaneous power feedback LED illumination visible light communication modulation method |
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| CN103312412A (en) * | 2012-03-06 | 2013-09-18 | 财团法人工业技术研究院 | Visible light communication transceiver and system |
| CN103312412B (en) * | 2012-03-06 | 2016-11-09 | 财团法人工业技术研究院 | Visible light communication transceiver |
| CN102625509A (en) * | 2012-03-09 | 2012-08-01 | 郭丰亮 | Intelligent lighting system based on LED (Light Emitting Diode) visible light communication |
| CN103369773A (en) * | 2012-03-29 | 2013-10-23 | 中国计量学院 | Wireless communication intelligent household system based on LED illuminating lamps |
| CN103368648A (en) * | 2012-04-01 | 2013-10-23 | 深圳光启创新技术有限公司 | Visible light communication system based on time division multiple access |
| CN103368648B (en) * | 2012-04-01 | 2017-05-03 | 深圳光启智能光子技术有限公司 | Visible light communication system based on time division multiple access |
| CN102752930A (en) * | 2012-06-28 | 2012-10-24 | 无锡莱吉特信息科技有限公司 | Intelligent LED (light-emitting diode) illumination system |
| CN103052218A (en) * | 2012-12-14 | 2013-04-17 | 重庆恒又源科技发展有限公司 | Control method and system of multiple LED (Light Emitting Diode) lamps |
| CN103052217A (en) * | 2012-12-14 | 2013-04-17 | 重庆恒又源科技发展有限公司 | LED (light emitting diode) control method and system based on ambient light detection technology |
| CN107635100A (en) * | 2012-12-27 | 2018-01-26 | 松下电器（美国）知识产权公司 | Information communicating method |
| CN107635100B (en) * | 2012-12-27 | 2020-05-19 | 松下电器（美国）知识产权公司 | Information communication method |
| CN103491667A (en) * | 2013-01-31 | 2014-01-01 | 吴嘉懿 | Illumination lamp |
| CN103491667B (en) * | 2013-01-31 | 2015-11-25 | 吴嘉懿 | Lighting |
| CN104348545A (en) * | 2013-07-26 | 2015-02-11 | 中兴通讯股份有限公司 | Multiple-input multiple-output visible light emitting device, method thereof, receiving device, and method thereof |
| CN104767566B (en) * | 2014-01-07 | 2018-11-30 | 中兴通讯股份有限公司 | A kind of light-dimming method and device for alleviating interframe flashing |
| CN104767566A (en) * | 2014-01-07 | 2015-07-08 | 中兴通讯股份有限公司 | Dimming method and device for alleviating inter-frame flicker |
| CN104467966A (en) * | 2014-12-31 | 2015-03-25 | 中国人民解放军信息工程大学 | LED modulating method and system based on visible light communication |
| CN104467966B (en) * | 2014-12-31 | 2017-10-24 | 中国人民解放军信息工程大学 | A kind of LED modulator approaches and system based on visible light communication |
| CN105179959A (en) * | 2015-06-10 | 2015-12-23 | 金陵科技学院 | Adjustable illumination communication device and system |
| CN104980217B (en) * | 2015-06-19 | 2017-12-19 | 邹骁 | A kind of visible light communication system, method and relevant device |
| CN104980217A (en) * | 2015-06-19 | 2015-10-14 | 邹骁 | Visible light communication system and method, and associated device |
| CN106357331A (en) * | 2015-07-16 | 2017-01-25 | 北京全电智领科技有限公司 | Visible-light communication method and visible-light communication system on basis of light intensity perception |
| CN106357331B (en) * | 2015-07-16 | 2019-04-23 | 北京全电智领科技有限公司 | A kind of visible light communication method and system based on light intensity perception |
| US9648701B1 (en) | 2015-12-31 | 2017-05-09 | General Electric Company | Multi-functional optical sensor for indoor lighting systems |
| CN106027161B (en) * | 2016-05-24 | 2018-10-16 | 中国人民解放军信息工程大学 | Control method, the device and system of visible light communication |
| CN106027161A (en) * | 2016-05-24 | 2016-10-12 | 中国人民解放军信息工程大学 | Visible light communication control method, device and system |
| CN106888056A (en) * | 2017-03-29 | 2017-06-23 | 西安易朴通讯技术有限公司 | The power regulating method and device of visible light communication |
| CN111492598B (en) * | 2018-01-08 | 2021-07-09 | 华为技术有限公司 | Camera communication method and device |
| US11025342B2 (en) | 2018-01-08 | 2021-06-01 | Huawei Technologies Co., Ltd. | Camera communication method and apparatus |
| CN111492598A (en) * | 2018-01-08 | 2020-08-04 | 华为技术有限公司 | Camera communication method and device |
| CN110940987A (en) * | 2018-09-20 | 2020-03-31 | 欧姆龙(上海)有限公司 | Control device and method for photoelectric detection system and photoelectric detection system |
| CN112840745A (en) * | 2018-10-18 | 2021-05-25 | 昕诺飞控股有限公司 | Determining light settings and/or daylight blocker settings based on data signal quality |
| WO2020200247A1 (en) * | 2019-04-03 | 2020-10-08 | 深圳迈睿智能科技有限公司 | Light-sensing control device, flicker-free light-sensing lamp, and light-sensing method |
| CN110138457A (en) * | 2019-04-10 | 2019-08-16 | 南京南邮信息产业技术研究院有限公司 | Has the underwater visible light communication system of condition monitoring and operating condition adaptively |
| CN109981170A (en) * | 2019-04-12 | 2019-07-05 | 清华-伯克利深圳学院筹备办公室 | A kind of radio optical communication system and method |
| CN110312290A (en) * | 2019-08-09 | 2019-10-08 | Oppo（重庆）智能科技有限公司 | Communication network switching method, device and computer readable storage medium |
| CN112272434A (en) * | 2020-10-30 | 2021-01-26 | 福州大学 | Instantaneous power feedback LED illumination visible light communication modulation method |
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Application publication date: 20110824 |