CN103281135A - Optical wave remote wireless communication system - Google Patents
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- CN103281135A CN103281135A CN2013102390089A CN201310239008A CN103281135A CN 103281135 A CN103281135 A CN 103281135A CN 2013102390089 A CN2013102390089 A CN 2013102390089A CN 201310239008 A CN201310239008 A CN 201310239008A CN 103281135 A CN103281135 A CN 103281135A
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Abstract
The invention relates to an optical wave remote wireless communication system. An optical signal sending device is used for converting electrical signals to be optical wave signals, two monochromatic light sources are used for sending the optical wave signals outwards, an optical signal receiving device is used for receiving the optical wave signals and converting the optical wave signals into the electrical signals, then the electrical signals are demodulated, original numbers or analog signals are obtained, and therefore wireless and remote transmission of optical signals is achieved. According to the optical wave remote wireless communication system, light is used as a transmission medium, blocking performance is good, two different kinds of light are used for combining and forming the optical wave signals, the very large bandwidth is achieved, interference of sunlight can be avoided, anti-interference capacity is strong, and a transmission distance is long.
Description
Technical field
The present invention relates to wireless communication technology field, particularly a kind of light wave remote wireless communication system.Background technology
Traditional radio communication technology is owing to frequency limitation, and transmission effective bandwidth is restricted.Traditional wireless telecommunications cable is subjected to the earth " shielding " influence in subterranean tunnel, under water communication, and communication efficiency is subjected to very big influence, has limited application and the development of communication equipment greatly.
Summary of the invention
Main purpose of the present invention is, at 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, advantages such as long transmission distance.
The present invention solves the technical scheme that the prior art problem adopts:
The invention provides a kind of light wave remote wireless communication system, comprise optical signal launcher and light signal receiving, described optical signal launcher is used for the signal of telecommunication is converted to lightwave signal and outwards emission, described light signal receiving is used for receiving described lightwave signal and being converted to the signal of telecommunication, described optical signal launcher comprises signal of telecommunication processing module and light signal generation module, described signal of telecommunication processing module is modulated into carrier signal with the signal of telecommunication, described carrier signal is input in the described light signal generation module, described light signal generation module is controlled, made described light signal generation module produce the lightwave signal of two groups of different wave lengths; Described light signal receiving comprises optical signal receiving module and signal of telecommunication recovery module, described optical signal receiving module receives described lightwave signal, and described lightwave signal is converted to described carrier signal, described signal of telecommunication recovery module is handled described carrier signal, converts described carrier signal to the described signal of telecommunication.
Preferably, described light signal generation module comprises constant-current source circuit and two monochromatic sources that link to each other with described constant-current source circuit, and described two monochromatic sources are sent two groups of lightwave signals of different wave length.
Preferably, described signal of telecommunication processing module comprises electric signal input end, coding circuit, modulation circuit and driving amplifier, described coding circuit is to the processing of encoding from the signal of telecommunication of electric signal input end input, and export described modulation circuit to, described modulation circuit carries out modulation treatment to the signal of telecommunication after encoding, form described carrier signal, and export described driving amplifier to, described driving amplifier is connected with described two monochromatic sources, controls switching frequency and the switching time of described two monochromatic sources.
Preferably, between described modulation circuit and driving amplifier, also be provided with digital aberration split circuit, described digital aberration split circuit converts described carrier signal to according to pre-defined rule and comprises two composite signals that drive signal, and described two drive switching frequency and the switching time that signal is suitable for controlling respectively by driving amplifier two monochromatic sources.
Preferably, described optical signal receiving module comprises set of lenses and coloured light identification circuit, described set of lenses receives described two lightwave signals that monochromatic source is sent, and described coloured light identification circuit converts carrier signal to after described lightwave signal is identified and handled, and with described carrier signal output.
Preferably, described set of lenses comprises two convex lens, and described demixing scan circuit also comprises focus circuit, and described focus circuit is connected with one drive circuit, described drive circuit is connected with a stepping motor, and described stepping motor is adjusted the distance between described two convex lens.
Preferably, the array scanning switching circuit that described coloured light identification circuit comprises color sensitive sensor, be connected with color sensitive sensor and demixing scan circuit, the light intensity comparator and the dichroic filter that are connected with the array scanning switching circuit, described color sensitive sensor, light intensity comparator and dichroic filter are converted to an initialize signal with described lightwave signal, described initialize signal comprise described two monochromatic sources switching frequency and switching time information; Described demixing scan circuit is controlled described array scanning switching circuit according to the output result of described light intensity comparator.
Preferably, described color sensitive sensor is provided with the focusing reference level, when described demixing scan electric circuit inspection is lower than described focusing reference level to the output level of described color sensitive sensor, described focus circuit is adjusted the distance between described two convex lens, and described lightwave signal is focused at described color sensitive sensor.
Preferably, described signal of telecommunication recovery module comprises waveform shaping phase-shift circuit, synchronous circuit, demodulator circuit and electrical signal, described waveform shaping phase-shift circuit links to each other with described optical signal receiving module, described carrier signal is shaped to square-wave signal and exports described demodulator circuit to, after described demodulator circuit carries out demodulation to described carrier signal, form the described signal of telecommunication, by described electrical signal output; Described synchronous circuit is adjusted into frequency and the phase place identical with described carrier signal with described waveform shaping phase-shift circuit and demodulator circuit.
Preferably, also be provided with also primary circuit of digital aberration between described waveform shaping phase-shift circuit and demodulator circuit, described digital aberration also primary circuit converts initialize signal to described carrier signal according to pre-defined rule.
The invention has the beneficial effects as follows: adopt optical signal launcher that the signal of telecommunication is converted to lightwave signal, two monochromatic sources of recycling are outwards launched lightwave signal, receive above-mentioned lightwave signal by light signal receiving, and this lightwave signal is converted to the signal of telecommunication, the signal of telecommunication is carried out demodulation process, obtain original figure or analog signal, thereby realize the signal transmission.The present invention utilizes light as transmission medium, and blocking-up property is good, and utilizes two kinds of different light to be combined to form lightwave signal, not only have very large bandwidth, and can avoid the interference of sunlight, thereby antijamming capability is strong, long transmission distance.
Description of drawings
Fig. 1 is the block diagram of light wave remote wireless communication system in the embodiment of the invention one;
Fig. 2 is the block diagram of optical signal launcher in the embodiment of the invention two;
Fig. 3 is the block diagram of light signal receiving in the embodiment of the invention three.
The realization of the object of the invention, functional characteristics and advantage will be in conjunction with the embodiments, are described further with reference to accompanying drawing.
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.
Embodiment one:
With reference to shown in Figure 1, present embodiment provides a kind of light wave remote wireless communication system 100, this light wave remote wireless communication system 100 comprises optical signal launcher 1 and light signal receiving 2 two large divisions, optical signal launcher 1 is used for the signal of telecommunication is converted to lightwave signal (as visible light, infrared ray, ultraviolet ray etc.), and launch to the external world, light signal receiving 2 is used for the lightwave signal that receiving optical signals emitter 1 sends and is converted into the signal of telecommunication, thereby realizes radio communication.
Particularly, optical signal launcher 1 comprises signal of telecommunication processing module 11 and light signal generation module 12, wherein, signal of telecommunication processing module 11 is modulated into carrier signal with the signal of telecommunication, carrier signal is input in the light signal generation module 12, and light signal generation module 12 is controlled, and makes light signal generation module 12 produce two groups of monochromatic light that wavelength is different, and outwards launch in certain specific mode, form lightwave signal.
In the present embodiment, optical signal launcher 1 has the method that the common signal of telecommunication converts carrier signal to multiple, as adopting frequency generator to generate a fundamental signal, again with control signal or data-signal and the modulation of this first-harmonic, form a carrier signal, launch to the external world with the form of visible light or invisible light by light signal generation module 12 then.After the light signal receiving 2 that is positioned at far-end receives above-mentioned lightwave signal, this lightwave signal is converted to carrier signal, devices such as recycling demodulator circuit are handled carrier signal, obtain the original signal of telecommunication, thereby realize wireless transmission and the telecommunication of this signal of telecommunication.Because lightwave signal comprises the monochromatic light of two kinds of different wave lengths, changes these two kinds of monochromatic flicker frequencies and namely can change the content that lightwave signal comprises switching time, thereby can carry more information.
Embodiment two:
With reference to shown in Figure 2, present embodiment provides a kind of optical signal launcher 1 for the light wave remote wireless communication system, it comprises signal of telecommunication processing module 11 and light signal generation module 12, wherein, light signal generation module 12 comprises constant-current source circuit 121, two monochromatic sources 122 that are connected with this constant-current source circuit 121 and the power switch circuit 123 of controlling above-mentioned monochromatic source light on and off.These two monochromatic sources 122 are led light source or other light source, can send two groups of monochromatic light of different wave length.Constant-current source circuit 121 is for above-mentioned two monochromatic sources provide stable electric current, makes brightness and the intensity of the light that they send constant.
Signal of telecommunication processing module 11 comprises electric signal input end 111, coding circuit 112, modulation circuit 113 and driving amplifier 114; electric signal input end 111 is used for input electrical signal; coding circuit 112 is for processing that the signal of telecommunication is encoded; make the signal of telecommunication behind the coding obtain encipherment protection, perhaps meet specific transmitting-receiving rule.Modulation circuit 113 is used for the signal of telecommunication behind the coding is carried out modulation treatment, as mentioned above, the purpose of modulation is, the signal of telecommunication is mixed stack with the fundamental signal that a frequency generator 115 produces, form a carrier signal, both comprise data-signal in this carrier signal so that make, comprised control signal again, can effectively expand transfer bandwidth.Above-mentioned carrier signal is after modulation circuit 113 outputs, enter driving amplifier 114, by exporting above-mentioned power switch circuit 123 to after driving amplifier 114 amplifications, and then control these two monochromatic sources 122 and carry out Push And Release according to the control signal in the carrier signal, make the monochromatic light that sends have certain flicker frequency and alternating sequence.
In addition, present embodiment also is provided with digital aberration split circuit 116 between modulation circuit 113 and driving amplifier 114, this numeral aberration split circuit 116 converts carrier signal to according to pre-defined rule and comprises two composite signals that drive signal, these two drive signal and belong to a kind of unique control signal, can be used for controlling respectively by driving amplifier 114 switching frequency and the switching time of above-mentioned two monochromatic sources 122, thereby launch one group of diverse light signal of group content, represent different data-signals or control signal respectively, realize the emission of lightwave signal.
Embodiment three:
With reference to shown in Figure 3, present embodiment provides a kind of light signal receiving 2 for the light wave remote wireless communication system, it comprises optical signal receiving module 21 and signal of telecommunication recovery module 22, optical signal receiving module 21 comprises set of lenses 211 and coloured light identification module 212, wherein, set of lenses 211 is used for receiving two lightwave signals that monochromatic source is sent, and 212 pairs of lightwave signals of coloured light identification circuit are identified and handled, and convert carrier signal to and export this carrier signal.22 of signal of telecommunication recovery module are used for above-mentioned carrier signal is reduced into the required signal of telecommunication, and this signal of telecommunication includes but not limited to data-signal and control signal.
Particularly, the above-mentioned coloured light identification circuit 212 array scanning switching circuit 2122 and demixing scan circuit 2123, the light intensity comparator 2124 that is connected with array scanning switching circuit 2122 and the dichroic filter 2125 that comprise color sensitive sensor 2121, be connected with color sensitive sensor 2121.Wherein, color sensitive sensor 2121, light intensity comparator 2124 and dichroic filter 2125 are converted to an initialize signal with lightwave signal, this initialize signal comprises information such as the switching frequency of two monochromatic sources and switching time, demixing scan circuit 2123 is controlled array scanning switching circuit 2122 according to the output result of light intensity comparator 2124.After set of lenses 211 receives lightwave signal, lightwave signal is projected on the color sensitive sensor 2121, and form bright spot at color sensitive sensor 2121, the ground floor switching circuit of array scanning switching circuit 2122 is opened, the induced voltage that this bright spot is produced at color sensitive sensor 2121 be input to light intensity comparator 2124, the induced voltage that produces with sunlight compares, thereby judges that whether this bright spot is than sun light.If then light intensity comparator 2124 is exported high level, otherwise, light intensity comparator 2124 output low levels.If light intensity comparator 2124 output low levels, then demixing scan circuit 2123 continues color sensitive sensor 2121 is scanned, up to light intensity comparator 2124 output high level; If light intensity comparator 2124 output high level, then demixing scan circuit 2123 is opened the second layer switching circuit of array scanning switching circuit 2122, and 2123 pairs of bright spot regions of demixing scan circuit are further scanned, and dwindle sweep limits.The induced voltage that this bright spot is produced is exported by dichroic filter at last, exports signal of telecommunication recovery module 22 after the amplification to and carries out subsequent treatment.
Signal of telecommunication recovery module 22 comprises waveform shaping phase-shift circuit 221, synchronous circuit 222, demodulator circuit 223 and electrical signal 224.Waveform shaping phase-shift circuit 221 links to each other with above-mentioned coloured light identification circuit 212, carrier signal is shaped to square-wave signal exports demodulator circuit 223 to, after 223 pairs of carrier signals of demodulator circuit are carried out demodulation, forms the signal of telecommunication, by electrical signal 224 outputs.Synchronous circuit 222 is used for waveform shaping phase-shift circuit 221, demodulator circuit 223 are adjusted into the frequency identical with carrier signal and phase place, in order to receive complete lightwave signal.
Also be provided with also primary circuit 225 of digital aberration between above-mentioned waveform shaping phase-shift circuit 221 and the demodulator circuit 223, and between demodulator circuit 223 and electrical signal 224, be provided with decoding and error correction circuit 226, this numeral aberration also primary circuit 225 converts above-mentioned initialize signal to carrier signal according to pre-defined rule, be demodulated to control signal and data-signal by demodulator circuit 223 then, control signal is directly exported by electrical signal 224, after data-signal is decoded and is corrected by decoding and error correction circuit 226, by electrical signal 224 outputs.
In addition, the set of lenses 211 of present embodiment comprises two convex lens, above-mentioned demixing scan circuit 2123 also comprises focus circuit 2126, this focus circuit 2126 is connected with one drive circuit 2127, drive circuit 2127 is connected with a stepping motor 2128, stepping motor 2128 can be adjusted two distances between the convex lens, make lightwave signal scioptics group 211 after, focus at color sensitive sensor 2121.
Simultaneously, color sensitive sensor 2121 is provided with the focusing reference level, when 2123 pairs of color sensitive sensors 2121 of above-mentioned demixing scan circuit scan, focus circuit 2126 is adjusted the distance between two convex lens in real time, lightwave signal is focused at color sensitive sensor 2121, thereby make lightwave signal keep maximum luminous intensity.
Describe function and the principle of present embodiment below in detail with a concrete example.
Suppose that lightwave signal is a red-light LED light source and an alternately flicker formation of blue-ray LED light source, changes the content that scintillation time and flicker frequency can change data-signal or control signal representative.When this lightwave signal projects on the color sensitive sensor 2121, might also can project on this color sensitive sensor 2121 by sunlight, at this moment, 2123 pairs of color sensitive sensors of demixing scan circuit 2121 carry out subregion scanning, up to obtain brightness greater than sunray brightness bright spot, again this bright spot is passed through red and blue dichroic filter 2125, judge whether this bright spot is effective lightwave signal.If bright spot obtains continuing the output voltage of variation by after the dichroic filter 2125, show that then this bright spot is that ruddiness and blue light form, be effective lightwave signal, otherwise this bright spot is interference signal.
If detecting the output level of color sensitive sensor 2121, demixing scan circuit 2123 is lower than the focusing reference level, show that then the light luminance on the color sensitive sensor 2121 is not enough, light does not focus on, at this moment, focus circuit 2126 control step motors, adjust the distance between two convex lens, lightwave signal can be focused at color sensitive sensor 2121.
After effectively the bright spot of lightwave signal formation is passed through light intensity comparator 2124 and dichroic filter 2125 respectively, export a level signal, and trigger a signal comparison amplifier 2129, above-mentioned level signal is amplified, form above-mentioned initialize signal.Then, this initialize signal also forms above-mentioned carrier signal behind the primary circuit 225 through waveform shaping phase-shift circuit 221 and digital aberration, carry out demodulation by 223 pairs of these carrier signals of demodulator circuit again, obtain original data-signal and control signal, data-signal is again after decoding and error correction circuit 226 decoding, error correction, by electrical signal 224 outputs.Control signal then directly by electrical signal 224 outputs, can be used as follow-up control signal source.
In sum, the present invention adopts optical signal launcher that the signal of telecommunication is converted to lightwave signal, two monochromatic sources of recycling are outwards launched lightwave signal, receive above-mentioned lightwave signal by light signal receiving again, and this lightwave signal is converted to the signal of telecommunication, again the signal of telecommunication is carried out demodulation process, obtain original figure or analog signal, thereby realize the signal transmission.The present invention utilizes light as transmission medium, and blocking-up property is good, and utilizes two kinds of different light to be combined to form lightwave signal, not only have very large bandwidth, and can avoid the interference of sunlight, thereby antijamming capability is strong, long transmission distance.
The above only is the preferred embodiments of the present invention; be not so limit its claim; every equivalent structure or equivalent flow process conversion that utilizes specification of the present invention and accompanying drawing content to do; directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.
Claims (10)
1. light wave remote wireless communication system, comprise optical signal launcher and light signal receiving, described optical signal launcher is used for the signal of telecommunication is converted to lightwave signal and outwards emission, described light signal receiving is used for receiving described lightwave signal and being converted to the signal of telecommunication, it is characterized in that: described optical signal launcher comprises signal of telecommunication processing module and light signal generation module, described signal of telecommunication processing module is modulated into carrier signal with the signal of telecommunication, described carrier signal is input in the described light signal generation module, described light signal generation module is controlled, made described light signal generation module produce the lightwave signal of two groups of different wave lengths; Described light signal receiving comprises optical signal receiving module and signal of telecommunication recovery module, described optical signal receiving module receives described lightwave signal, and described lightwave signal is converted to described carrier signal, described signal of telecommunication recovery module is handled described carrier signal, converts described carrier signal to the described signal of telecommunication.
2. light wave remote wireless communication system as claimed in claim 1, it is characterized in that: described light signal generation module comprises constant-current source circuit and two monochromatic sources that link to each other with described constant-current source circuit, and described two monochromatic sources are sent two groups of lightwave signals of different wave length.
3. light wave remote wireless communication system as claimed in claim 2, it is characterized in that: described signal of telecommunication processing module comprises electric signal input end, coding circuit, modulation circuit and driving amplifier, described coding circuit is to the processing of encoding from the signal of telecommunication of electric signal input end input, and export described modulation circuit to, described modulation circuit carries out modulation treatment to the signal of telecommunication after encoding, form described carrier signal, and export described driving amplifier to, described driving amplifier is connected with described two monochromatic sources, controls switching frequency and the switching time of described two monochromatic sources.
4. light wave remote wireless communication system as claimed in claim 3, it is characterized in that: between described modulation circuit and driving amplifier, also be provided with digital aberration split circuit, described digital aberration split circuit converts described carrier signal to according to pre-defined rule and comprises two composite signals that drive signal, and described two drive switching frequency and the switching time that signal is suitable for controlling respectively by driving amplifier two monochromatic sources.
5. light wave remote wireless communication system as claimed in claim 2, it is characterized in that: described optical signal receiving module comprises set of lenses and coloured light identification circuit, described set of lenses receives described two lightwave signals that monochromatic source is sent, described coloured light identification circuit converts carrier signal to after described lightwave signal is identified and handled, and with described carrier signal output.
6. light wave remote wireless communication system as claimed in claim 5, it is characterized in that: described set of lenses comprises two convex lens, described demixing scan circuit also comprises focus circuit, described focus circuit is connected with one drive circuit, described drive circuit is connected with a stepping motor, and described stepping motor is adjusted the distance between described two convex lens.
7. light wave remote wireless communication system as claimed in claim 6, it is characterized in that: the array scanning switching circuit that described coloured light identification circuit comprises color sensitive sensor, be connected with color sensitive sensor and demixing scan circuit, the light intensity comparator and the dichroic filter that are connected with the array scanning switching circuit, described color sensitive sensor, light intensity comparator and dichroic filter are converted to an initialize signal with described lightwave signal, described initialize signal comprise described two monochromatic sources switching frequency and switching time information; Described demixing scan circuit is controlled described array scanning switching circuit according to the output result of described light intensity comparator.
8. light wave remote wireless communication system as claimed in claim 7, it is characterized in that: described color sensitive sensor is provided with the focusing reference level, when described demixing scan electric circuit inspection is lower than described focusing reference level to the output level of described color sensitive sensor, described focus circuit is adjusted the distance between described two convex lens, and described lightwave signal is focused at described color sensitive sensor.
9. light wave remote wireless communication system as claimed in claim 7, it is characterized in that: described signal of telecommunication recovery module comprises waveform shaping phase-shift circuit, synchronous circuit, demodulator circuit and electrical signal, described waveform shaping phase-shift circuit links to each other with described optical signal receiving module, described carrier signal is shaped to square-wave signal and exports described demodulator circuit to, after described demodulator circuit carries out demodulation to described carrier signal, form the described signal of telecommunication, by described electrical signal output; Described synchronous circuit is adjusted into frequency and the phase place identical with described carrier signal with described waveform shaping phase-shift circuit and demodulator circuit.
10. light wave remote wireless communication system as claimed in claim 9, it is characterized in that: also be provided with also primary circuit of digital aberration between described waveform shaping phase-shift circuit and demodulator circuit, described digital aberration also primary circuit converts initialize signal to described carrier signal according to pre-defined rule.
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| CN103954834A (en) * | 2014-05-13 | 2014-07-30 | 江苏理工学院 | LED flicker frequency and waveform testing system and method |
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| CN104467961A (en) * | 2013-09-16 | 2015-03-25 | 刘红超 | Communication device |
| CN104683033A (en) * | 2013-11-28 | 2015-06-03 | 哈尔滨市三和佳美科技发展有限公司 | Bidirectional remote laser communication apparatus |
| CN106153010A (en) * | 2016-07-25 | 2016-11-23 | 上海交通大学 | Anti-sunshine vision detection system and method based on LED and reflex reflection |
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