CN111953416B - Automatic indoor visible light communication alignment system based on photoresistor - Google Patents
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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
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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
- H04B10/1149—Arrangements for indoor wireless networking of information
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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
- H04B10/50—Transmitters
- H04B10/501—Structural aspects
- H04B10/502—LED transmitters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/695—Control of camera direction for changing a field of view, e.g. pan, tilt or based on tracking of objects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/22—Adaptations for optical transmission
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Abstract
The invention discloses an indoor visible light communication automatic alignment system based on a photoresistor, which comprises a transmitting end, a receiving end and a tracking unit of a white light LED (light-emitting diode) containing the photoresistor, wherein the transmitting end is connected with the receiving end; the transmitting end generates an original data signal and controls the white light LED to emit a light modulation signal to be transmitted to the receiving end; the receiving end receives the light modulation signal sent by the white light LED at the transmitting end and restores the original signal; the white light LED tracking unit is used for positioning and tracking the white light LED at the emitting end; the white light LED tracking unit comprises a photoresistor, an operational amplification circuit, an STM32 single chip microcomputer and a steering engine driving unit which are connected in sequence. The automatic alignment system solves the problem that the receiving direction of visible light cannot be automatically adjusted in the prior art.
Description
Technical Field
The invention belongs to the technical field of visible light communication, and particularly relates to an indoor visible light communication automatic alignment system based on a photoresistor.
Background
Due to the limitation of the current information technology level, the frequency spectrum resource developed and used by human beings is only 68% of the total resource, and the frequency spectrum of 10GHz is close to withering due to wide use, the development space is limited, the frequency contradiction is very prominent, and the competition is increasingly violent. The british government has explicitly proposed means such as spectrum pricing, spectrum auction, spectrum trade and the like in the white paper of spectrum resource management of 21 st century issued by the british government, and according to statistics of relevant data, in 1995 to 2011, countries such as the united states, english, germany, law, korea and the like are third-generation and fourth-generation mobile communication networks, and the value of the auctioned spectrum is up to 1300 billion dollars. Article 46 to article 52 of the 'property right law' of China stipulate that the electromagnetic spectrum has the nationally owned attributes of national defense assets and is listed as a scarce natural resource. In order to alleviate the problem of serious shortage of radio frequency spectrum resources, a visible light communication technology which uses a visible light spectrum which does not need authorization authentication and has a bandwidth ten thousand times higher than that of a wireless frequency spectrum and utilizes an environment-friendly and low-power-consumption white light LED to transmit signals is more and more favored and valued by scientific researchers. However, at present, most indoor visible light communication systems adopt a mode of fixing a receiving direction, mobility and flexibility are poor, and when the receiving direction is changed, a receiver cannot be automatically calibrated, so that communication quality of the system is affected. This communication method with fixed receiving direction has the following disadvantages:
(1) The receiving mode can only acquire optical signals within a specific angle range, the use scene is limited, the light source cannot be tracked, the active selection capability of a communication link is not provided, and the communication link of the system cannot be kept stable.
(2) Because the communication performance of the system is positively correlated with the effective receiving areas of the receiver and the light source, when the relative angle between the receiver and the light source changes, the light intensity signal received by the receiver becomes weak, the communication quality of the system is greatly influenced, and the receiving direction cannot be actively adjusted by the fixed receiving mode, so that the tracking and the alignment of the light source are realized.
But for the utility of indoor VLC, the communication rate should not be respected separately, and reception mobility and flexibility should also be considered.
Disclosure of Invention
The invention aims to provide an indoor visible light communication automatic alignment system based on a photoresistor, and solves the problem that the receiving direction of visible light cannot be automatically adjusted in the prior art.
The technical scheme adopted by the invention is that the indoor visible light communication automatic alignment system based on the photoresistor comprises a transmitting end, a receiving end and a tracking unit of a white light LED containing the photoresistor;
the transmitting end generates an original data signal and controls the white light LED to emit a light modulation signal to be transmitted to the receiving end;
the receiving end receives the light modulation signal sent by the white light LED at the transmitting end and restores the original signal;
the white light LED tracking unit is used for positioning and tracking the white light LED at the emitting end;
the white light LED tracking unit comprises a photoresistor, an operational amplification circuit, an STM32 single chip microcomputer and a steering engine driving unit which are connected in sequence;
the photoresistor is used for receiving the illumination intensity of the white light LED generated by the transmitting end, outputting an electric signal and outputting the electric signal to the STM32 singlechip through the operational amplification circuit; the STM32 single chip microcomputer receives the analog electric signals output by the operational amplification circuit and converts the analog electric signals into digital signals, and the steering engine driving unit is controlled to rotate by calculating the digital signals of each pair of channels in the STM32 single chip microcomputer after analog-to-digital conversion through a PID control algorithm, so that the white light LED light source is tracked.
The present invention is also characterized in that,
the transmitting end comprises an analog camera, a video encoder, a first Ethernet card, a first FPGA, a DAC circuit, an LED drive circuit and a white light LED which are connected in sequence;
the analog camera acquires an original video image, transmits the original video image to the video encoder to convert the original video image data into a digital signal in an H.264 format, transmits the converted digital signal in the H.264 format to the first Ethernet card through a network cable, packages the digital in the H.264 format into a data frame format through the first Ethernet card, and transmits the packaged data frame to the first FPGA; the first FPGA receives the packed data frame from the first Ethernet card and carries out quaternary differential phase shift keying modulation on the data frame; the DAC circuit receives the digital modulation signal modulated by the first FPGA, converts the digital modulation signal into an analog modulation signal and transmits the analog modulation signal to the LED drive circuit; the LED driving circuit converts the analog modulation signal output by the DAC circuit into a current signal and is used for driving the white LED to emit light to generate a modulated light wave signal; the light modulation signal sent by the white light LED is transmitted to a receiving end, the illumination intensity generated by the white light LED is received by the photoresistor, the white light LED sends high-speed bright and dark flashing data information in a mode of turning on and off the light, and the flashing phenomenon cannot be detected by naked eyes because the flashing frequency is higher than the resolution of human eyes, when the data is transmitted, the light is on to represent binary data '1', and the light is off to represent binary data '0'; the first FPGA realizes downlink signal modulation and driving of the first Ethernet card and the DAC circuit.
The receiving end comprises a PIN photoelectric detector, a photoelectric receiving circuit, an ADC circuit, a second FPGA, a second Ethernet card and an information sink which are connected in sequence;
the photoelectric receiving circuit drives the PIN photoelectric detector to receive the light modulation signal sent by the white light LED, the light modulation signal is converted into a current signal, the current signal is converted into a recognizable voltage signal after filtering and amplifying processing of the photoelectric receiving circuit, the ADC circuit receives the voltage signal generated by the photoelectric receiving circuit, the voltage signal is converted into a digital signal by setting a sampling period, and the digital signal is sent to the second FPGA; the second FPGA carries out polarity Costas loop demodulation on the received digital signal to recover an original data signal, and the original data signal is sent to a signal sink through a network cable by a second Ethernet card, so that wireless data transmission of an electric signal-an optical signal-an electric signal is finally realized; and the second FPGA realizes downlink signal demodulation and drive of a second Ethernet card and an ADC circuit.
The video encoder is a hundred million dimensional keen network video encoder with the model number of YW6001D.
The models of the first Ethernet card and the second Ethernet card are DM9000.
The invention has the beneficial effects that: the method actively acquires the light source information without being limited by the receiving direction, and when the relative angle between the signal light source and the receiver changes, the receiving direction can be adjusted to align the light source, so that a new communication link can be established in time, and mobile directional receiving is realized.
Drawings
FIG. 1 is a schematic structural diagram of an indoor visible light communication automatic alignment system based on a photoresistor according to the present invention;
FIG. 2 is a schematic view of a PIN photodetector and photoresistor fixture used in the automatic alignment system of the present invention.
In the figure, 1 is an analog camera, 2 is a video encoder, 3 is a first Ethernet card, 4 is a first FPGA,5 is a DAC circuit, 6 is an LED drive circuit, 7 is a white LED,8 is a photoelectric receiving circuit, 9 is an ADC circuit, 10 is a second FPGA,11 is a second Ethernet card, 12 is a signal sink, 13 is a PIN photoelectric detector, 14 is a photoresistor, 15 is an operational amplification circuit, 16 is an STM32 single chip microcomputer, and 17 is a steering engine drive unit.
Detailed Description
The invention is described in detail below with reference to the drawings and the detailed description.
The invention provides an indoor visible light communication automatic alignment system based on a photoresistor, which comprises a transmitting end, a receiving end and a tracking unit of a white light LED (light-emitting diode) containing the photoresistor, as shown in figure 1;
the transmitting end generates an original data signal and controls the white light LED to emit a light modulation signal to be transmitted to the receiving end;
the receiving end receives the light modulation signal sent by the white light LED at the transmitting end and restores the original signal;
the white light LED tracking unit is used for positioning and tracking the white light LED at the emitting end;
the white light LED tracking unit comprises a photoresistor 14, an operational amplification circuit 15, an STM32 singlechip 16 and a steering engine driving unit 17 which are connected in sequence;
the photoresistor 14 is used for receiving the illumination intensity of the white light LED generated by the transmitting end, outputting an electric signal, and outputting the electric signal to the STM32 singlechip 16 through the operational amplification circuit 15; the STM32 single chip microcomputer 16 receives the analog electric signals output by the operational amplification circuit 15 and converts the analog electric signals into digital signals, and the steering engine driving unit 17 is controlled to rotate by calculating the digital signals of each pair of channels in the STM32 single chip microcomputer 16 after analog-to-digital conversion through a PID control algorithm, so that the white light LED light source is tracked. A PID control algorithm is written by using C language, and the control of a steering engine driving unit is realized on an STM32S singlechip.
The transmitting end comprises an analog camera 1, a video encoder 2, a first Ethernet card 3, a first FPGA4, a DAC circuit 5, an LED drive circuit 6 and a white light LED7 which are connected in sequence;
the analog camera 1 acquires an original video image, transmits the original video image to the video encoder 2 to convert the original video image data into a digital signal in an H.264 format, transmits the converted digital signal in the H.264 format to the first Ethernet card 3 through a network cable, packages the digital in the H.264 format into a data frame format through the first Ethernet card 3, and transmits the packaged data frame to the first FPGA4; the first FPGA4 receives the packed data frame from the first Ethernet card 3 and carries out quaternary differential phase shift keying modulation on the data frame; the DAC circuit 5 receives the digital modulation signal modulated by the first FPGA4, converts the digital modulation signal into an analog modulation signal and transmits the analog modulation signal to the LED drive circuit 6; the LED drive circuit 6 is used for converting the analog modulation signal output by the DAC circuit 5 into a current signal and driving the white LED7 to emit light so as to generate a modulated light wave signal; the light modulation signal sent by the white light LED7 is transmitted to a receiving end, the illumination intensity generated by the white light LED7 is received by the photoresistor 14, the white light LED7 sends high-speed bright and dark flashing data information in a mode of turning on and off the light, the flashing phenomenon cannot be perceived by naked eyes because the flashing frequency is higher than the resolution of human eyes, the turning on of the light represents binary data '1' when data is transmitted, and the turning off of the light represents binary data '0'; the first FPGA4 modulates the downlink signal and drives the first ethernet card 3 and the DAC circuit 5.
The receiving end comprises a PIN photoelectric detector 19, a photoelectric receiving circuit 8, an ADC circuit 9, a second FPGA10, a second Ethernet card 11 and a signal sink 12 which are connected in sequence;
the photoelectric receiving circuit 8 drives the PIN photoelectric detector 19 to receive the light modulation signal sent by the white light LED7, converts the light modulation signal into a current signal, converts the current signal into a recognizable voltage signal after filtering and amplifying processing of the photoelectric receiving circuit 8, and the ADC circuit 9 receives the voltage signal generated by the photoelectric receiving circuit 8, converts the voltage signal into a digital signal by setting a sampling period and sends the digital signal to the second FPGA10; the second FPGA10 performs polarity Costas loop demodulation on the received digital signal to recover the original data signal, and the original data signal is sent to the signal sink through the network cable by the second ethernet card 11, so as to finally realize wireless data transmission of the electrical signal-optical signal-electrical signal; the second FPGA10 demodulates the downlink signal and drives the second ethernet card 11 and the ADC circuit 9.
The video encoder 2 is a hundred million dimensional creative network video encoder with the model number of YW6001D.
The first ethernet card 3 and the second ethernet card 11 are both of DM9000.
The working principle of the indoor visible light communication automatic alignment system based on the photoresistor is as follows:
in the indoor visible light communication automatic alignment system based on the photoresistor, as shown in fig. 2, the white light LED7 of the emitting end can be placed on the ceiling, and data transmission is performed while lighting is provided for the indoor. The receiving end and the tracking part of the white light LED7 are positioned on various information terminals, a light source can be captured to actively select a communication link, the receiving direction of the receiving end is flexibly adjusted to receive downlink information, and high-quality visible light communication is realized. The position of the light source is identified by using the photoresistor 14, the PIN photoelectric detector is used for communication, a communication receiving and direction distinguishing separation mode is adopted, four photoresistors (named as a No. 1 photoresistor, a No. 2 photoresistor, a No. 3 photoresistor and a No. 4 photoresistor respectively) are used in the white light LED tracking unit, and each pair of photoresistors are completely symmetrically arranged on two sides of an illumination receiving surface. The light source position change is detected through the photoresistor 14, and the light source is tracked in time by controlling the steering engine driving unit.
The tracking method of the white light LED adopts closed-loop control, errors can be eliminated through feedback, four photoresistors are used in a white light LED tracking unit, the photoresistors can be completely located in an illumination area only when light irradiated by the white light LED at the transmitting end vertically irradiates on a receiving surface, two electric signals with the same size can be output at the moment, an operational amplification circuit receives the two electric signals and has a modulus conversion function in an STM32 single chip microcomputer 16, a signal difference of zero can be output in a symmetrical channel, and a tracking device cannot be started. When light irradiated by the white light LED is not vertically irradiated on the receiving surface, the light intensity of the white light LED received by the photoresistors 14 on two sides of the receiving surface is different, at the moment, the operational amplification circuit can output two electric signals with different sizes, and then the two electric signals are input into the STM32 singlechip 16 to be subjected to analog-to-digital conversion, so that signal difference can be output in the symmetrical channels. When the signal difference reaches a certain threshold value, the PID controller starts the steering engine driving unit to track the light source, the steering engine driving unit is stopped until the signal difference is reduced within a certain threshold value range, the tracking of the light source is finished, the light intensity signal received by the PIN photoelectric detector 13 is the best at the moment, the communication quality of the system is the best, and the PIN photoelectric detector 13 is always in the best receiving direction of the LED signal by tracking the white light LED. The method has simple structure, can automatically track the white light LED without manual operation, and realizes high-quality visible light communication. The light intensity signals received by the white light LED at the transmitting end are converted into electric signals by the No. 1 light-sensitive resistor and the No. 4 light-sensitive resistor, the electric signals are output by the operational amplification circuit, and the signal difference converted into digital signals by the STM32 single chip microcomputer 16 is used for controlling the steering engine driving unit 17 in the y-axis direction through a PID control algorithm. The light intensity signals received by the white light LED at the transmitting end are converted into electric signals by the photoresistors No. 2 and No. 3, the electric signals are output by the operational amplification circuit, and the signal difference converted into digital signals by the STM32 single chip microcomputer 16 is used for controlling the steering engine driving unit 17 in the x-axis direction through a PID control algorithm. The PIN photoelectric detector 13 of the receiving end is placed in the middle and fixed in parallel, the PIN photoelectric receiver 13 and the photosensitive resistor 14 move synchronously, and therefore the PIN photoelectric receiver 13 and the photosensitive sensor are relatively static, and the receiving end can simultaneously realize photoelectric receiving and target light source identification tracking. The functions of illumination, downlink communication and identification and tracking of the light source are realized.
Claims (1)
1. The indoor visible light communication automatic alignment system based on the photoresistor is characterized by comprising a transmitting end, a receiving end and a tracking unit of a white light LED containing the photoresistor;
the transmitting end generates an original data signal and controls the white light LED to emit a light modulation signal to be transmitted to the receiving end;
the receiving end receives the light modulation signal sent by the white light LED of the transmitting end and recovers the original signal;
the white light LED tracking unit is used for positioning and tracking the white light LED at the emitting end;
the white light LED tracking unit comprises a photoresistor (14), an operational amplifier circuit (15), an STM32 singlechip (16) and a steering engine driving unit (17) which are connected in sequence;
the photoresistor (14) is used for receiving the illumination intensity of the white light LED generated by the transmitting end, outputting an electric signal and outputting the electric signal to the STM32 singlechip (16) through the operational amplification circuit (15); the STM32 single chip microcomputer (16) receives the analog electric signal output by the operational amplification circuit (15), converts the analog electric signal into a digital signal, and controls a steering engine driving unit (17) to rotate through calculating the digital signal of each pair of channels in the STM32 single chip microcomputer (16) after analog-to-digital conversion by a PID control algorithm so as to realize the tracking of the white light LED light source;
the transmitting end comprises an analog camera (1), a video encoder (2), a first Ethernet card (3), a first FPGA (4), a DAC circuit (5), an LED drive circuit (6) and a white light LED (7) which are connected in sequence;
the method comprises the steps that an analog camera (1) acquires an original video image, then transmits the original video image to a video encoder (2) to convert original video image data into digital signals in an H.264 format, the converted digital signals in the H.264 format are transmitted to a first Ethernet card (3) through a network cable, the digits in the H.264 format are packaged into a data frame format through the first Ethernet card (3), and then the packaged data frame is transmitted to a first FPGA (4); the first FPGA (4) receives the packed data frame from the first Ethernet card (3) and carries out quaternary differential phase shift keying modulation on the data frame; the DAC circuit (5) receives the digital modulation signal modulated by the first FPGA (4), converts the digital modulation signal into an analog modulation signal and transmits the analog modulation signal to the LED drive circuit (6); the LED driving circuit (6) is used for converting the analog modulation signal output by the DAC circuit (5) into a current signal and driving the white light LED (7) to emit light to generate a modulated light wave signal;
the light modulation signal sent by the white light LED (7) is transmitted to a receiving end, the illumination intensity generated by the white light LED (7) is received by the photoresistor (14), the white light LED (7) sends high-speed bright and dark flashing data information in a mode of turning on and off the light, and the flashing phenomenon cannot be perceived by naked eyes because the flashing frequency is higher than the resolution of human eyes, when data is transmitted, the light is on to represent binary data '1', and the light is off to represent binary data '0'; the first FPGA (4) realizes downlink signal modulation and drive of the first Ethernet card (3) and the DAC circuit (5);
the receiving end comprises a PIN photoelectric detector (13), a photoelectric receiving circuit (8), an ADC circuit (9), a second FPGA (10), a second Ethernet card (11) and a sink (12) which are connected in sequence;
the position of a light source is identified by using a photoresistor (14), a PIN photoelectric detector (13) is used for communication, a mode of separating communication receiving from direction distinguishing is adopted, four photoresistors are used in a white light LED tracking unit, each pair of photoresistors are completely and symmetrically arranged on two sides of a light irradiation receiving surface, the position change of the light source is detected through the photoresistors (14), and the light source is tracked in time by controlling a steering engine driving unit;
when light irradiated by the white light LED at the transmitting end vertically irradiates on the receiving surface, the tracking device is not started; when light irradiated by the white light LED is not vertically irradiated on a receiving surface, the light intensity of the white light LED received by the photoresistors (14) on two sides of the receiving surface is different, at the moment, the operational amplification circuit can output two electric signals with different sizes, and then the two electric signals are input into an STM32 singlechip (16) to be subjected to analog-digital conversion, and signal difference can be output in a symmetrical channel; when the signal difference reaches a threshold value, the PID controller starts the steering engine driving unit to track the light source, and the steering engine driving unit is stopped until the signal difference is reduced within the threshold value range, namely the tracking of the light source is completed; a PIN photoelectric detector (13) of a receiving end is placed in the middle of a plane where 4 photoresistors (14) are located and fixed together in parallel, so that the receiving end can simultaneously realize photoelectric receiving and target light source identification tracking;
the photoelectric receiving circuit (8) drives the PIN photoelectric detector (13) to receive the light modulation signal sent by the white light LED (7), the light modulation signal is converted into a current signal, the current signal is converted into a recognizable voltage signal after filtering and amplifying processing of the photoelectric receiving circuit (8), the ADC circuit (9) receives the voltage signal generated by the photoelectric receiving circuit (8), the voltage signal is converted into a digital signal by setting a sampling period, and the digital signal is sent to the second FPGA (10); the second FPGA (10) performs polarity Costas loop demodulation on the received digital signal to recover an original data signal, and the original data signal is sent to a signal sink through a network cable by a second Ethernet card (11) to finally realize wireless data transmission of an electric signal, an optical signal and an electric signal; the second FPGA (10) realizes downlink signal demodulation and driving of the second Ethernet card (11) and the ADC circuit (9).
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| CN113162688B (en) * | 2021-04-13 | 2023-03-28 | 中山大学 | Visible light two-way communication and positioning system |
| WO2023039827A1 (en) * | 2021-09-17 | 2023-03-23 | 深圳大学 | Optimization method based on fusion of visible light communication and visible light positioning |
| CN114465666A (en) * | 2022-03-22 | 2022-05-10 | 中山市中创光电产业技术研究院 | Multi-color visible light array high-speed communication system based on OFDM |
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Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR101321704B1 (en) * | 2009-08-04 | 2013-10-25 | 한국전자통신연구원 | Apparatus for visible light communication providing intuitive information and method using the same |
| CN202268883U (en) * | 2011-10-28 | 2012-06-06 | 桂林电子科技大学 | White light led building visible light digital transmission system |
| CN102664679B (en) * | 2012-04-10 | 2015-03-18 | 长春理工大学 | Arrayed photoelectric detector in wireless laser communication device |
| CN103915025A (en) * | 2014-03-21 | 2014-07-09 | 中国石油大学(华东) | Intelligent optical tracking demonstration instrument |
| CN105162517B (en) * | 2015-08-20 | 2017-12-01 | 华南理工大学 | Visible light communication method and its visible light communication system based on pulse amplitude regulation and control |
| CN105094156A (en) * | 2015-09-01 | 2015-11-25 | 西安文理学院 | Cup-type distribution photovoltaic power generation self-tracking system and control method |
| CN105827309A (en) * | 2016-03-10 | 2016-08-03 | 文成县刀锋科技有限公司 | Indoor LED visible light communication system |
| CN106500836B (en) * | 2016-12-08 | 2018-01-02 | 苏州聚晟太阳能科技股份有限公司 | A kind of optical sensor suitable for photovoltaic tracking |
| CN206274159U (en) * | 2016-12-19 | 2017-06-23 | 重庆汉岳科技发展有限公司 | Interior illumination control system based on natural lighting |
| GB201708643D0 (en) * | 2017-05-31 | 2017-07-12 | Univ Edinburgh | Optical wireless communications system |
| CN107883333A (en) * | 2017-11-22 | 2018-04-06 | 田涵 | A kind of double focusing luminous energy tracking superconduction lighting device and method |
| CN109063212A (en) * | 2018-09-28 | 2018-12-21 | 西北工业大学 | A kind of intelligence auxiliary purchase guiding system and method based on visible light communication |
| CN111103579A (en) * | 2020-01-15 | 2020-05-05 | 长安大学 | Visible light indoor positioning system and method based on mobile phone camera |
| CN111383269A (en) * | 2020-03-23 | 2020-07-07 | 卓尔智联(武汉)研究院有限公司 | Light sensing equipment applied to visible light communication system |
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