CN103763030A - Unidirectional transmission device based on LIFI lamplight - Google Patents
Unidirectional transmission device based on LIFI lamplight Download PDFInfo
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- CN103763030A CN103763030A CN201410012937.0A CN201410012937A CN103763030A CN 103763030 A CN103763030 A CN 103763030A CN 201410012937 A CN201410012937 A CN 201410012937A CN 103763030 A CN103763030 A CN 103763030A
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Abstract
The invention discloses a unidirectional transmission device based on LIFI lamplight, and belongs to the technical field of communication. The unidirectional transmission device based on LIFI lamplight comprises a sending end communicated with a sending module, and a receiving end communicated with a receiving module, and the sending module and the receiving module are physically separated; the sending module comprises an LED which is used for sending light signals; the receiving module comprises a photomultiplier which is used for receiving the light signals sent by the LED and performing counting detection; the LED and the photomultiplier are arranged oppositely. Data are transmitted in one way through the light signals with the LIFI technology, data transmission is safe and reliable, the transmission efficiency reaches 1000Mbps, and the device is simple in structure and convenient to set and use. In order to guarantee stable and reliable transmission and receiving of the light signals, the LED and a bandpass optical filter should be arranged on the same line. The LED and the bandpass optical filter are arranged in the same sealed and light-shielding box body, and interference of stray light in the signal transmission process can be reduced.
Description
Technical field
The present invention relates to a kind of one-way transmission apparatus, is specifically a kind of one-way transmission apparatus based on LIFI light, belongs to communication technical field.
Background technology
Network service has become the basic tool of information interchange between world's all trades and professions, but existing communication network and communications equipment is to be all mostly that communication protocol based on traditional completes, and be all based upon on the basis of traditional physical link, communication security can not get effective assurance, cannot meet the communication requirement of the secret units such as army, state security department.
On January 11st, 2013, Chinese invention patent application CN103067405A discloses a kind of inter-network safe transmission method and device thereof, it becomes Quick Response Code figure to output to display screen the data transaction of needs transmission after by data processor disposal data information, by probe every sky scanning Quick Response Code figure reading character string, be transferred to another separate network after data processor conversion.But the information capacity by Quick Response Code single transmission is limited, and transmission speed is relatively slow, cannot realize data inter-network fast transport; In addition this apparatus structure is complicated,
In August, 2011, the famous physicist HeraldHaas of Britain researched and developed a kind of brand-new wireless data transmission technology, this technology is called as Light Fidelity, be called for short Li-fi, it is a kind of technology of utilizing the light transmission data that light source sends, its fast open by LED light source, light switch, or strong, weak switching, realizes the binary coding of information and transmission, and the present invention will utilize Li-fi technology to realize unidirectional, quick, safety-oriented data transfer.
Summary of the invention
Technical problem to be solved by this invention is to overcome above-mentioned defect, and the one-way transmission apparatus based on LIFI light that a kind of transmission capacity is large, transmission rate is fast, transmitting procedure is safe is provided.
In order to solve the problems of the technologies described above, the one-way transmission apparatus based on LIFI light provided by the invention, comprises the transmitting terminal being communicated with sending module and the receiving terminal being communicated with receiver module, it is characterized in that: physical isolation between described sending module and receiver module; Described sending module comprises LED, for sending light signal; Described receiver module comprises photomultiplier, for receiving described LED, sends light signal count detection; Described LED and photomultiplier arrange in opposite directions.
In order to guarantee reliable and stable transmission and the reception of light signal, described LED and photomultiplier are arranged on same straight line.
For reducing the interference of veiling glare in signals transmission, described LED and photomultiplier are arranged in the casing of same sealing shading.
In the present invention, described sending module also comprises: data-interface, for accepting transmitting terminal data; Signal is processed code modulation module, for low frequency signal, is modulated into high-frequency signal; Light drive circuit, for to high-frequency signal collection, conversion, amplification and filtering.
In the present invention, described receiver module also comprises: bandpass optical filter, the light of other wavelength of light signal that receive for filtering; The main amplification module of filtering, disturbs with preventing for noise suppressed; Signal is processed synchronous demodulation module, for demodulation restoring signal waveform, by modulation waveform out; Data-interface, for sending data to receiving terminal;
In the present invention, described data-interface is network interface card.
Beneficial effect of the present invention is: (1), the present invention adopt LIFI technology by optical signal transmission data, and its efficiency of transmission reaches 1000Mbps; (2), sending module and receiver module adopt corresponding setting, and data are carried out to one-way transmission, guaranteed data security; (3), the present invention is simple in structure, setup and use is convenient.
Accompanying drawing explanation
Fig. 1 is the one-way transmission apparatus overall structure figure based on LIFI light of the present invention;
Fig. 2 is sending module theory diagram in the present invention;
Fig. 3 is receiver module theory diagram in the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is elaborated.
As shown in Figure 1, one-way transmission apparatus based on LIFI light of the present invention, comprise sending module 1, receiver module 2, transmitting terminal 3, receiving terminal 4, wherein transmitting terminal 3 is communicated with sending module 1, receiving terminal 4 is communicated with receiver module 2, physical isolation between sending module 1 and receiver module 2, sending module 1 arranges in opposite directions with receiver module 2.
As shown in Figure 2, sending module 1 is processed code modulation module, light drive circuit and LED and is connected to form successively by data-interface, signal, and wherein, data-interface is for the transmission data of receiving end/sending end 3; Signal is processed code modulation module and is transmitted data to change carrier parameter by the Changing Pattern of baseband signal to data-interface, and low frequency signal is modulated into high-frequency signal; Light drive circuit is converted to light signal by the high-frequency signal collecting, and amplify, filtering and removal noise; LED transmits processing through light drive circuit the light signal amplifying by fast blink.
As shown in Figure 3, receiver module 2 is connected to form successively by photomultiplier (PMT), bandpass optical filter (agc circuit), the main amplification module of filtering, signal processing synchronous demodulation module and data-interface.Wherein, the light signal that photomultiplier sends for receiving the LED of sending module 1, carries out count detection to light signal; The light of other wavelength of light signal that bandpass optical filter receives for filtering photomultiplier only, through the light of required wave-length coverage, carries out opto-electronic conversion by light signal simultaneously; The main amplification module of filtering is for producing noise and suppress and prevent from disturbing changing rear signals transmission; Signal is processed synchronous demodulation circuit and is used for the signal restoring signal waveform the demodulation that receive; Data-interface is for being sent to receiving terminal by data.
Data-interface in above-mentioned sending module 1, receiver module 2 is network interface card.
The bandpass optical filter of the LED of sending module 1 and receiver module 2 arranges in opposite directions, and in order to guarantee reliable and stable transmission and the reception of light signal, LED and bandpass optical filter should arrange on same straight line.
The bandpass optical filter of the LED of sending module 1 and receiver module 2 is arranged in the casing of same sealing shading, to reduce the interference of veiling glare in signals transmission.
During transmission, transmitting terminal 3 by data to be sent add head portion, afterbody, verification etc. rule encoding, then by data, the data-interface by sending module 1 is transferred to signal and processes code modulation module, signal is processed code modulation module and is come data to change carrier parameter by the Changing Pattern of modulation signal (baseband signal) to transmission, is transferred to light drive circuit after low frequency signal is modulated into high-frequency signal; Light drive circuit carries out electric light conversion, amplification and filtering processing to collecting high-frequency signal, and pin down the means such as amplification and suppress the external interference such as electromagnetic induction and electrostatic induction by taking to lock amplification, signal averaging, adaptive noise cancellation, low noise, reduce thermal noise, Johnson noise, low-frequency noise, put the noises such as atmospheric noise, improve Signal-to-Noise; The light signal of processing through light drive circuit is transferred on receiver module 2 by LED and via airspace again.The light signal that photomultiplier on receiver module 2 sends LED receives and count detection, and its counting intensity is directly proportional to the instantaneous power of receiving; The light of other wavelength in the composite optical signal that bandpass optical filter filtering photomultiplier receives, sees through the light of required wave-length coverage, light signal is carried out to be transferred to the main amplification module of filtering after opto-electronic conversion simultaneously and carries out noise suppressed friendship and eliminate other interference; Signal is processed synchronous demodulation circuit to the signal restoring signal waveform that the main amplification module of the filtering receiving was processed, carry out demodulation and be transferred to receiving terminal by sending module 1 data-interface, receiving terminal is received to decode after signal and is removed the head, afterbody, verification etc. of signal, extracts and obtain valid data.
The above is only the preferred embodiment of the present invention, it should be pointed out that for those skilled in the art, can also make some improvement under the premise without departing from the principles of the invention, and these improvement also should be considered as protection scope of the present invention.
Claims (6)
1. the one-way transmission apparatus based on LIFI light, comprises the transmitting terminal being communicated with sending module and the receiving terminal being communicated with receiver module, it is characterized in that: physical isolation between described sending module and receiver module; Described sending module comprises LED, for sending light signal; Described receiver module comprises photomultiplier, for receiving described LED, sends light signal count detection; Described LED and photomultiplier arrange in opposite directions.
2. the one-way transmission apparatus based on LIFI light according to claim 1, is characterized in that: described LED and photomultiplier are arranged on same straight line.
3. the one-way transmission apparatus based on LIFI light according to claim 2, is characterized in that: described LED and photomultiplier are arranged in the casing of same sealing shading.
4. the one-way transmission apparatus based on LIFI light according to claim 1, is characterized in that described sending module also comprises:
Data-interface, for accepting transmitting terminal data;
Signal is processed code modulation module, for low frequency signal, is modulated into high-frequency signal;
Light drive circuit, for to high-frequency signal collection, conversion, amplification and filtering.
5. the one-way transmission apparatus based on LIFI light according to claim 1, is characterized in that described receiver module also comprises:
Bandpass optical filter, the light of other wavelength of light signal that receive for filtering;
The main amplification module of filtering, disturbs with preventing for noise suppressed;
Signal is processed synchronous demodulation module, for demodulation restoring signal waveform, by modulation waveform out;
Data-interface, for sending data to receiving terminal.
6. according to the one-way transmission apparatus based on LIFI light described in claim 4 or 5, it is characterized in that: described data-interface is network interface card.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410012937.0A CN103763030A (en) | 2014-01-13 | 2014-01-13 | Unidirectional transmission device based on LIFI lamplight |
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| CN201410012937.0A CN103763030A (en) | 2014-01-13 | 2014-01-13 | Unidirectional transmission device based on LIFI lamplight |
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|---|---|---|---|---|
| CN104485995A (en) * | 2014-12-15 | 2015-04-01 | 昆山国显光电有限公司 | Light fidelity access device |
| CN105679005A (en) * | 2016-01-18 | 2016-06-15 | 南京航空航天大学 | Rotating apparatus non-contact signal transmission apparatus based on LIFI and infrared light |
| CN105999605A (en) * | 2016-05-23 | 2016-10-12 | 苏州迈奇杰智能技术有限公司 | Intelligent prewarning device based on indoor LED visible light communication lifi technology |
| CN109425841A (en) * | 2017-08-30 | 2019-03-05 | 西门子(深圳)磁共振有限公司 | Magnetic resonance wireless local coil block, wireless local coil and transmission module |
| CN113797515A (en) * | 2021-08-31 | 2021-12-17 | 海南翔睿德科技有限公司 | Table tennis service robot capable of automatically counting |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104485995A (en) * | 2014-12-15 | 2015-04-01 | 昆山国显光电有限公司 | Light fidelity access device |
| CN105679005A (en) * | 2016-01-18 | 2016-06-15 | 南京航空航天大学 | Rotating apparatus non-contact signal transmission apparatus based on LIFI and infrared light |
| CN105999605A (en) * | 2016-05-23 | 2016-10-12 | 苏州迈奇杰智能技术有限公司 | Intelligent prewarning device based on indoor LED visible light communication lifi technology |
| CN109425841A (en) * | 2017-08-30 | 2019-03-05 | 西门子(深圳)磁共振有限公司 | Magnetic resonance wireless local coil block, wireless local coil and transmission module |
| CN113797515A (en) * | 2021-08-31 | 2021-12-17 | 海南翔睿德科技有限公司 | Table tennis service robot capable of automatically counting |
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Application publication date: 20140430 |