CN102916749A - Light communication transmitting and receiving system - Google Patents
Light communication transmitting and receiving system Download PDFInfo
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- CN102916749A CN102916749A CN2012103977103A CN201210397710A CN102916749A CN 102916749 A CN102916749 A CN 102916749A CN 2012103977103 A CN2012103977103 A CN 2012103977103A CN 201210397710 A CN201210397710 A CN 201210397710A CN 102916749 A CN102916749 A CN 102916749A
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Abstract
The invention relates to a light communication transmitting and receiving system which comprises a light modulation transmitter and a light receiving demodulator, wherein the light modulation transmitter modules an electric signal into a light signal and transmits the light signal to the outside through a carrier light source; and the light receiving demodulator receives and demodulates the light signal and converts the light signal into the electric signal. By adopting the light communication transmitting and receiving system, a communication process is relatively convenient and quick; and the light communication transmitting and receiving system has the characteristics of good stopping performance, high interference resistance, long transmission distance and the like.
Description
Technical field
The present invention relates to the communication equipment technical field, particularly a kind of optical communication receive-transmit system.
Background technology
Traditional radio communication technology is because frequency limitation, and bandwidth is seriously limited, causes communication efficiency to be greatly affected, exist bandwidth little, easily disturb and uneasy congruent factor, greatly limited the application and development of communication equipment.
Summary of the invention
Main purpose of the present invention is, for above-mentioned deficiency of the prior art, provides a kind of optical communication receive-transmit system, and it is good that it has blocking-up property, and antijamming capability is strong, the advantages such as long transmission distance.
For achieving the above object, the present invention by the following technical solutions.
The invention provides a kind of optical communication receive-transmit system, comprise light modulation reflector and light-receiving demodulator, described light modulation reflector is modulated into light signal with the signal of telecommunication, by the carrier light source described light signal is outwards launched; Described light-receiving demodulator receives and the described light signal of demodulation, and described light signal is converted to the described signal of telecommunication.
Preferably, described light modulation reflector comprises signal input circuit, the compressed encoding circuit, the radio-frequency generator circuit, modulation circuit, constant-current source circuit and described carrier light source, the described signal of telecommunication is inputted from described signal input circuit, behind described compressed encoding circuit compression and coding, the fundamental signal that produces with described radio-frequency generator circuit mixes, by described modulation circuit the described signal of telecommunication and fundamental signal are modulated into carrier signal, and export described constant-current source circuit to, described constant-current source circuit is connected with described carrier light source, control the flicker frequency of described carrier light source, form described light signal and outwards emission.
Preferably, described light-receiving demodulator comprises photosensitive device, matrix-scanning/identification circuit, the phase-locked loop frequency synchronous circuit, signal amplification circuit, signal demodulating circuit and signal output apparatus, described photosensitive device receives described light signal, described matrix-scanning/identification circuit scans and identifying processing described light signal, described phase-locked loop frequency synchronous circuit is after described matrix-scanning/identification circuit recognizes described light signal, receive and described light signal is input in the described signal amplification circuit and amplify processing, described signal demodulating circuit carries out demodulation process to the described light signal after amplifying, and converts described signal of telecommunication output to behind described signal output apparatus decoding and decompress(ion).
Preferably, described matrix-scanning/identification circuit comprises be used to the receiving circuit that receives described light signal.
Preferably, described phase-locked loop frequency synchronous circuit comprises the voltage controlled frequency oscillator, when described matrix-scanning/identification circuit recognized described light signal, described voltage controlled frequency oscillator was adjusted to the natural frequency of described receiving circuit identical with the flicker frequency of described light signal.
Preferably, described phase-locked loop frequency synchronous circuit also comprises synchronous circuit, when described matrix-scanning/identification circuit recognizes described light signal, described synchronous circuit carries out the phase place adjustment with the light signal that described receiving circuit receives, and makes the phase place of described receiving circuit and the Phase synchronization of described light signal.
Preferably, described signal output apparatus comprises decoder circuit and decompression circuit, described decoder circuit is for processing that digital electric signal is decoded, and described decompression circuit is used for analog electrical signal is carried out decompression, is respectively applied to the described signal of telecommunication is carried out dynamic restoration disposal.
Preferably, described photosensitive device is CCD or COMS camera.
Than above-mentioned prior art, the present invention has following beneficial effect.
Optical communication receive-transmit system of the present invention adopts the light modulation reflector that the signal of telecommunication is converted to light signal, recycling led light source or fluorescence light source etc. are outwards launched light signal as the carrier light source, and receive above-mentioned light signal by the light-receiving demodulator, and this light signal is converted to the signal of telecommunication, again the signal of telecommunication is carried out demodulation and press processing, obtain original figure or analog signal, thereby realize the signal transmission.The invention enables communication process to become convenient and quick, and its to have blocking-up property good, antijamming capability is strong, the characteristics such as long transmission distance.
Description of drawings
Fig. 1 is the block diagram of optical communication receive-transmit system in the embodiment of the invention.
Fig. 2 is the block diagram of light modulation reflector in the embodiment of the invention.
Fig. 3 is the block diagram of light-receiving demodulator in the embodiment of the invention.
The realization of the object of the invention, functional characteristics and advantage are described further with reference to accompanying drawing in connection with embodiment.
Embodiment
Describe technical scheme of the present invention in detail below with reference to drawings and the specific embodiments, so as clearer, understand invention essence of the present invention intuitively.
Optical communication is a kind of emerging wireless communication technology, can be widely used in interior of aircraft, subterranean tunnel and some security level required is higher and occasion that must radio communication, have extraordinary application prospect, therefore, the invention provides a kind of optical communication receive-transmit system, to satisfy following market demand.
Fig. 1 is the block diagram of optical communication receive-transmit system in the embodiment of the invention; Fig. 2 is the block diagram of light modulation reflector in the embodiment of the invention; Fig. 3 is the block diagram of light-receiving demodulator in the embodiment of the invention.
With reference to shown in Figure 1, the optical communication receive-transmit system 100 that present embodiment provides comprises light modulation reflector 1 and light-receiving demodulator 2, and light modulation reflector 1 is used for converting the electrical signal to light signal, by carrier light source 11 light signal is outwards launched.The carrier light source 11 of present embodiment can adopt ordinary fluorescent light source or led light source.Light-receiving demodulator 2 is used for receiving and the above-mentioned light signal of demodulation, and light signal is converted to the signal of telecommunication, then the signal of telecommunication is outputed in the equipment or element of any needs, so that the signal of telecommunication is further processed or utilizes.
Particularly, with reference to Fig. 2 and shown in Figure 3, the light modulation reflector 1 of present embodiment comprises signal input circuit 12, compressed encoding circuit 13, radio-frequency generator circuit 14, modulation circuit 15, constant-current source circuit 16 and carrier light source 11, wherein, the signal of telecommunication is input in the light modulation reflector 100 from signal input circuit 12, through behind 13 compressions of compressed encoding circuit or the coding (usually, to the digital electric signal processing of encoding, analog electrical signal is compressed processing), be input in the modulation circuit 15.Above-mentioned radio-frequency generator circuit 14 is for generation of the fundamental signal of high frequency, this fundamental signal also is input in the modulation circuit 15, mix stack with above-said current signal and be modulated into carrier signal, this carrier signal is input in the above-mentioned constant-current source circuit 16, and constant-current source circuit 16 is controlled.Specifically can be, this carrier signal is controlled above-mentioned constant-current source circuit 16 and is opened the through and off pass with certain frequency, make constant-current source circuit 16 produce the switch electric impulse signal of high frequency, and the carrier light source 11 of present embodiment is connected with this constant-current source circuit 16, by constant-current source circuit 16 power supplies, therefore, the voltage that carrier light source 11 loads or the electric current that flows through are high frequency and change situation, make at a high speed flicker of carrier light source 11, the carrier signal that modulates according to modulation circuit 15 is different, the frequency of carrier light source 11 flickers is not identical with variation tendency yet, thereby form one group with the light signal of coding and outwards emission, this light signal can be used for carrying wireless signal and data, can be applicable to wireless telecommunications.
Accordingly, the light-receiving demodulator 2 of present embodiment comprises induction installation 21, matrix-scanning/identification circuit 22, phase-locked loop frequency synchronous circuit 23, signal amplification circuit 24, signal demodulating circuit 25 and signal output apparatus 26, wherein, photosensitive device 21 is CCD or the COMS first-class device of making a video recording.Induction installation 21 is used for specific picture is carried out sensitization, form an induction region, 22 pairs of above-mentioned induction regions of matrix-scanning/identification circuit carry out subarea-scanning and identifying processing, phase-locked loop frequency synchronous circuit 23 is after matrix-scanning/identification circuit 22 recognizes above-mentioned light signal, receive and above-mentioned light signal is input in the signal amplification circuit 24 and amplify processing, 25 of signal demodulating circuits carry out demodulation process to the above-mentioned light signal after amplifying, and behind signal output apparatus 26 decodings or decompress(ion), convert signal of telecommunication output to, realize the dynamic recovery of signal.
Specifically, matrix-scanning/identification circuit 22 comprises receiving circuit 221, be used for receiving above-mentioned light signal, phase-locked loop frequency synchronous circuit 23 comprises voltage controlled frequency oscillator 231, when matrix-scanning/identification circuit 22 recognizes light signal, voltage controlled frequency oscillator 231 is adjusted to the natural frequency of this receiving circuit 221 identical with the flicker frequency of light signal, makes more efficiently receiving optical signals of receiving circuit 221.
Simultaneously, phase-locked loop frequency synchronous circuit 23 also comprises synchronous circuit 232, when matrix-scanning/identification circuit 22 recognized above-mentioned light signal, synchronous circuit 232 carried out the phase place adjustment with the light signal that receiving circuit 221 receives, and made the phase place of receiving circuit 221 and the Phase synchronization of above-mentioned light signal.Voltage controlled frequency oscillator 231 and synchronous circuit 232 actings in conjunction make the light signal that receives stronger, truer.
When the bright spot frequency of occurrences of above-mentioned induction region is glimmered, matrix-scanning/identification circuit 22 stops scanning, and flash signal is sent to phase-locked loop frequency synchronous circuit 23 compares, if the natural frequency of the flicker frequency of this flash signal and above-mentioned receiving circuit 221 differs larger, then phase-locked loop frequency synchronous circuit 23 sends a feedback signal, makes matrix-scanning/identification circuit 22 continue scanning; If the natural frequency of the flicker frequency of flash signal and receiving circuit 221 approaches, then this flash signal is regarded as the light signal that carrier light source 11 sends, above-mentioned voltage controlled frequency oscillator 231 is adjusted to the frequency of receiving circuit 221 identical with the flicker frequency of flash signal, by synchronous circuit 232 phase place of receiving circuit 221 is adjusted again, made the Phase synchronization of itself and flash signal.Then, receiving circuit 221 begins to receive above-mentioned flash signal, and sends into and carry out signal separation process in the signal demodulating circuit 25, and the signal of telecommunication after the separation is by signal output apparatus 26 outputs.
The signal output apparatus 26 of present embodiment further comprises decoder circuit 261 and decompression circuit 262, decoder circuit 261 is mainly used in the digital electric signal processing of decoding, namely to the digital electric signal that after the light signal demodulation, the obtains processing of decoding, obtain original digital electric signal; Decompression circuit 262 is mainly used in analog electrical signal is carried out decompression, namely the analog electrical signal that obtains is carried out decompression after above-mentioned light signal demodulation, obtain original analog electrical signal, make from the raw electrical signal of signal input circuit 12 inputs and restored, therefore realize the transmission of the signal of telecommunication, reach the purpose of radio communication.
In sum, optical communication receive-transmit system of the present invention adopts the light modulation reflector that the signal of telecommunication is converted to light signal, recycling led light source or fluorescence light source etc. are outwards launched light signal as the carrier light source, and receive above-mentioned light signal by the light-receiving demodulator, and this light signal is converted to the signal of telecommunication, again the signal of telecommunication is carried out demodulation and press processing, obtain original figure or analog signal, thereby realize the signal transmission.The invention enables communication process to become convenient and quick, and its to have blocking-up property good, antijamming capability is strong, the characteristics such as long transmission distance.
The above only is the preferred embodiments of the present invention; be not so limit its claim; every equivalent structure transformation that utilizes specification of the present invention and accompanying drawing content to do directly or indirectly is used in other relevant technical fields, all in like manner is included in the scope of patent protection of the present invention.
Claims (8)
1. optical communication receive-transmit system, it is characterized in that: comprise light modulation reflector and light-receiving demodulator, described light modulation reflector is modulated into light signal with the signal of telecommunication, by the carrier light source described light signal is outwards launched; Described light-receiving demodulator receives and the described light signal of demodulation, and described light signal is converted to the described signal of telecommunication.
2. optical communication receive-transmit system as claimed in claim 1, it is characterized in that: described light modulation reflector comprises signal input circuit, the compressed encoding circuit, the radio-frequency generator circuit, modulation circuit, constant-current source circuit and described carrier light source, the described signal of telecommunication is inputted from described signal input circuit, behind described compressed encoding circuit compression and coding, the fundamental signal that produces with described radio-frequency generator circuit mixes, by described modulation circuit the described signal of telecommunication and fundamental signal are modulated into carrier signal, and export described constant-current source circuit to, described constant-current source circuit is connected with described carrier light source, control the flicker frequency of described carrier light source, form described light signal and outwards emission.
3. optical communication receive-transmit system as claimed in claim 1, it is characterized in that: described light-receiving demodulator comprises photosensitive device, matrix-scanning/identification circuit, the phase-locked loop frequency synchronous circuit, signal amplification circuit, signal demodulating circuit and signal output apparatus, described photosensitive device receives described light signal, described matrix-scanning/identification circuit scans and identifying processing described light signal, described phase-locked loop frequency synchronous circuit is after described matrix-scanning/identification circuit recognizes described light signal, receive and described light signal is input in the described signal amplification circuit and amplify processing, described signal demodulating circuit carries out demodulation process to the described light signal after amplifying, and converts described signal of telecommunication output to behind described signal output apparatus decoding and decompress(ion).
4. optical communication receive-transmit system as claimed in claim 3, it is characterized in that: described matrix-scanning/identification circuit comprises be used to the receiving circuit that receives described light signal.
5. optical communication receive-transmit system as claimed in claim 4, it is characterized in that: described phase-locked loop frequency synchronous circuit comprises the voltage controlled frequency oscillator, when described matrix-scanning/identification circuit recognized described light signal, described voltage controlled frequency oscillator was adjusted to the natural frequency of described receiving circuit identical with the flicker frequency of described light signal.
6. optical communication receive-transmit system as claimed in claim 4, it is characterized in that: described phase-locked loop frequency synchronous circuit also comprises synchronous circuit, when described matrix-scanning/identification circuit recognizes described light signal, described synchronous circuit carries out the phase place adjustment with the light signal that described receiving circuit receives, and makes the phase place of described receiving circuit and the Phase synchronization of described light signal.
7. optical communication receive-transmit system as claimed in claim 1, it is characterized in that: described signal output apparatus comprises decoder circuit and decompression circuit, described decoder circuit is for processing that digital electric signal is decoded, described decompression circuit is used for analog electrical signal is carried out decompression, is respectively applied to the described signal of telecommunication is carried out dynamic restoration disposal.
8. such as each described optical communication receive-transmit system in the claim 1～7, it is characterized in that: described photosensitive device is CCD or COMS camera.
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| CN2012103977103A CN102916749A (en) | 2012-10-18 | 2012-10-18 | Light communication transmitting and receiving system |
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| CN2012103977103A CN102916749A (en) | 2012-10-18 | 2012-10-18 | Light communication transmitting and receiving system |
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| CN103281135A (en) * | 2013-06-09 | 2013-09-04 | 陈思源 | Optical wave remote wireless communication system |
| CN103399650A (en) * | 2013-08-14 | 2013-11-20 | 广州视睿电子科技有限公司 | Remote pointing device and communication method between remote pointing device and target device |
| CN103888732A (en) * | 2014-03-25 | 2014-06-25 | 中国矿业大学(北京) | Simplex communication and recognition method based on mine lamp |
| CN104080233A (en) * | 2013-03-29 | 2014-10-01 | 国民技术股份有限公司 | Information broadcasting method and system, lighting equipment of information broadcasting system and connection control device for lighting equipment |
| CN104104441A (en) * | 2014-08-12 | 2014-10-15 | 陈思源 | Near field communication method and near field communication system for intelligent terminals |
| CN106027149A (en) * | 2016-07-21 | 2016-10-12 | 长春光客科技有限公司 | Multi-user visible light communication device and method adopting a plurality of rotatable top ends |
| CN106157690A (en) * | 2015-03-24 | 2016-11-23 | 重庆长安汽车股份有限公司 | A kind of rear-end collision early warning system based on visible light communication and method |
| CN103873832B (en) * | 2014-03-25 | 2017-12-26 | 中国矿业大学(北京) | A kind of simplex and recognition methods based on light-emitting device |
| CN109661500A (en) * | 2016-07-05 | 2019-04-19 | 萨兰达有限公司 | Sensor for fingerboard latch assembly |
| CN110342208A (en) * | 2019-07-10 | 2019-10-18 | 广州市建筑集团混凝土有限公司 | A kind of automatic batching system |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104080233B (en) * | 2013-03-29 | 2017-04-05 | 国民技术股份有限公司 | Information broadcast method, system and its luminaire and connection control device |
| CN104080233A (en) * | 2013-03-29 | 2014-10-01 | 国民技术股份有限公司 | Information broadcasting method and system, lighting equipment of information broadcasting system and connection control device for lighting equipment |
| CN103281135A (en) * | 2013-06-09 | 2013-09-04 | 陈思源 | Optical wave remote wireless communication system |
| CN103399650A (en) * | 2013-08-14 | 2013-11-20 | 广州视睿电子科技有限公司 | Remote pointing device and communication method between remote pointing device and target device |
| CN103888732A (en) * | 2014-03-25 | 2014-06-25 | 中国矿业大学(北京) | Simplex communication and recognition method based on mine lamp |
| CN103873832B (en) * | 2014-03-25 | 2017-12-26 | 中国矿业大学(北京) | A kind of simplex and recognition methods based on light-emitting device |
| CN104104441A (en) * | 2014-08-12 | 2014-10-15 | 陈思源 | Near field communication method and near field communication system for intelligent terminals |
| CN106157690A (en) * | 2015-03-24 | 2016-11-23 | 重庆长安汽车股份有限公司 | A kind of rear-end collision early warning system based on visible light communication and method |
| CN106157690B (en) * | 2015-03-24 | 2018-10-19 | 重庆长安汽车股份有限公司 | A kind of rear-end collision early warning system and method based on visible light communication |
| CN109661500A (en) * | 2016-07-05 | 2019-04-19 | 萨兰达有限公司 | Sensor for fingerboard latch assembly |
| US11015403B2 (en) | 2016-07-05 | 2021-05-25 | Salunda Limited | Sensor for a fingerboard latch assembly |
| CN106027149A (en) * | 2016-07-21 | 2016-10-12 | 长春光客科技有限公司 | Multi-user visible light communication device and method adopting a plurality of rotatable top ends |
| CN106027149B (en) * | 2016-07-21 | 2018-09-18 | 长春光客科技有限公司 | Using multi-user's visible light communication device and method at multiple rotatable top set ends |
| CN110342208A (en) * | 2019-07-10 | 2019-10-18 | 广州市建筑集团混凝土有限公司 | A kind of automatic batching system |
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Application publication date: 20130206 |