CN104539369A - Photoelectric receiving and transmitting device applicable to non-line-of-sight scattering communication - Google Patents
Photoelectric receiving and transmitting device applicable to non-line-of-sight scattering communication Download PDFInfo
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- CN104539369A CN104539369A CN201510023990.5A CN201510023990A CN104539369A CN 104539369 A CN104539369 A CN 104539369A CN 201510023990 A CN201510023990 A CN 201510023990A CN 104539369 A CN104539369 A CN 104539369A
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Abstract
The invention discloses a photoelectric receiving and transmitting device applicable to non-line-of-sight scattering communication. The photoelectric receiving and transmitting device comprises a plurality of light-emitting diodes, transmitting-end lenses, receiving-end lenses and an optical detector, wherein the transmitting-end lenses are arranged at the front ends of the plurality of light-emitting diodes; the photoelectric detector is arranged at the rear ends of the receiving-end lenses; the plurality of light-emitting diodes transmit ultraviolet light beams with oval cross sections outwards by the transmitting-end lenses; the cross sections of receiving view-field angles of the receiving-end lenses are oval and are matched with the sections of the ultraviolet light beams transmitted by the transmitting-end lenses, and the ultraviolet light beams with the oval cross sections enter the optical detector after passing through the receiving-end lenses. By adoption of the photoelectric receiving and transmitting device, the signal intensity is greatly improved.
Description
Technical field
The present invention relates to communication technical field, particularly relate to a kind of optoelectronic transceiver device being applicable to non line of sight scatter communication.
Background technology
Non line of sight scattered light communicates this concept after being suggested to, and causes the extensive attention of academia at once, and the interest that communication industry continues.It mainly utilizes the LED source of ultraviolet, the ultraviolet light sent out of light-emitting diode is as the carrier of information, by air Multiple Scattering communication channel, non line of sight wireless light communication can be realized, have access to its irreplaceable advantage compared to Wireless microwave or radio frequency.
At present, the scheme based on the scatter communication of ultraviolet light-emitting diode non line of sight mainly utilizes the light-emitting diode of taper luminous intensity distribution and the signal transceiver of photo-detector; But, the decline of non line of sight Multiple Scattering channel is 10 negative 10 times to 10 negative 13 times at the reception and transmission range of several meters-several kilometers, therefore, the decline being reduced Multiple Scattering channel by optical design is highly significant for the signal to noise ratio improving non line of sight scatter communication.
Summary of the invention
The object of this invention is to provide a kind of optoelectronic transceiver device being applicable to non line of sight scatter communication, substantially increase signal strength signal intensity.
The object of the invention is to be achieved through the following technical solutions:
Be applicable to an optoelectronic transceiver device for non line of sight scatter communication, comprise: a plural number light-emitting diode, the transmitting terminal lens being placed in a described plural number light-emitting diode front end, receiving terminal lens and be placed in the photo-detector of receiving terminal lens rear;
Wherein, a described plural number light-emitting diode outwards sends the ultraviolet light beam with oval cross section by transmitting terminal lens; The field of view of receiver angle cross section of described receiving terminal lens is the ellipse matched with described transmitting terminal lens emitting ultraviolet light area of beam, has the ultraviolet light beam of oval cross section by incident light detector after these receiving terminal lens.
Further, the ratio of semi-minor axis length of described oval cross section keeps fixing.
Further, the ratio of semi-minor axis length of described oval cross section is 2:1.
Further, described photo-detector comprises: photomultiplier or Avalanche Photo Diode.
Further, the wavelength of described light-emitting diode is between 260 nanometers to 280 nanometers.
Further, the dominant wavelength of described light-emitting diode is between 460 nanometers to 535 nanometers.
Further, a described plural number light-emitting diode adopts surface mount process to be arranged on the rectangular printed circuit board of ceramic material.
As seen from the above technical solution provided by the invention, there is oval cross section by adopting the luminous intensity distribution of transmitting terminal and the visual field of receiving terminal to distribute, improving signal strength signal intensity; Simulation analysis shows, in the situation of field stereo angle, identical sending and receiving end, the optical system of band non-circular cross-section can increase the signal strength signal intensity of 20-40% than other shape light distributing systems.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
The schematic diagram of the non line of sight scatter communication implementation that Fig. 1 provides for the embodiment of the present invention;
The light-emitting diode of the transmitting terminal that Fig. 2 provides for the embodiment of the present invention and light-distribution lens structural representation;
The light-distribution lens structure side view of the transmitting terminal that Fig. 3 provides for the embodiment of the present invention;
The light-distribution lens structural representation of the receiving terminal that Fig. 4 provides for the embodiment of the present invention;
The light-distribution lens end view of the receiving terminal that Fig. 5 provides for the embodiment of the present invention;
The number of photons that receive of luminous intensity distribution cross section under different deflection angle situations that the employing Monte Carlo simulation that Fig. 6 provides for the embodiment of the present invention three kinds of calculating are different;
The pulse stretching of the non line of sight scatter communication channel under the luminous intensity distribution cross section situation that the employing Monte Carlo simulation that Fig. 7 provides for the embodiment of the present invention three kinds of calculating are different.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on embodiments of the invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to protection scope of the present invention.
Embodiment
The embodiment of the present invention provides a kind of optoelectronic transceiver device being applicable to non line of sight scatter communication; It mainly comprises: a plural number light-emitting diode, the transmitting terminal lens being placed in a described plural number light-emitting diode front end, receiving terminal lens and be placed in the photo-detector of receiving terminal lens rear;
Wherein, a described plural number light-emitting diode outwards sends the ultraviolet light beam with oval cross section by transmitting terminal lens; The field of view of receiver angle cross section of described receiving terminal lens is the ellipse matched with described transmitting terminal lens emitting ultraviolet light area of beam, has the ultraviolet light beam of oval cross section by incident light detector after these receiving terminal lens.
Further, the ratio of semi-minor axis length of described oval cross section keeps fixing.
Further, the ratio of semi-minor axis length of described oval cross section is 2:1.
Further, described photo-detector comprises: photomultiplier or Avalanche Photo Diode.
Further, the wavelength of described light-emitting diode is between 260 nanometers to 280 nanometers.
Further, the dominant wavelength of described light-emitting diode is between 460 nanometers to 535 nanometers.
Further, a described plural number light-emitting diode adopts surface mount process to be arranged on the rectangular printed circuit board of ceramic material.
For the ease of understanding the present invention, below in conjunction with accompanying drawing 1-7, the present invention is described further.
The schematic diagram of the non line of sight scatter communication implementation provided for the embodiment of the present invention as shown in fig. 1; Wherein transmitting terminal lens send and have the ultraviolet light beam of non-circular cross-section, and transmit direction and horizontal plane form an angle (θ
1); Received by scattering process receiving end, and the field of view of receiver angle cross section of these receiving terminal lens is the ellipse matched with described transmitting terminal lens emitting ultraviolet light area of beam, meanwhile, the field of view of receiver of this receiving terminal and horizontal plane form an angle (θ
2), (θ
1with θ
2can unrestricted choice) as can be seen from Figure 1, the visual field of the luminous intensity distribution and receiving terminal that have employed transmitting terminal distributes oval cross section, and the major axis of oval cross section is all perpendicular to transmitting-receiving face.Simulation analysis shows, in the situation of field stereo angle, identical sending and receiving end, the optical system of band non-circular cross-section can increase the signal strength signal intensity of 20-40% than taper light distributing system.
Be illustrated in figure 2 light-emitting diode and the light-distribution lens structural representation of the transmitting terminal that the embodiment of the present invention provides; Every light-emitting diode 3 all adopts surface mount process to be arranged on the rectangular printed circuit board 2 of ceramic material, and the paving layers of copper on printed circuit board (PCB) 2 and line width, spacing meet the general design rule of communication printed circuit board (PCB).Wherein, the outer surface of light-emitting diode light-distribution lens 1 is special surface, light-emitting diode 3 is equidistantly placed in the cavity of lens interior, the edge of cavity is plane, the ultraviolet light that such lens devices can make light-emitting diode send emergent light after the refraction of lens is that solid angle is even, and cross section is oval light beam.Fig. 3 is the end view of this transmitting terminal light-distribution lens, and 14 is the profile of transmitting terminal lens side-looking.
Be illustrated in figure 4 the light-distribution lens structural representation of the receiving terminal that the embodiment of the present invention provides, 11 is receiving terminal lens; 12 is receiving terminal lens base profile.The angle of visual field cross section of the reception of these lens 11 is the ellipse matched with transmitted beam cross section, and these lens except making the cross section, visual field of receiving terminal similar to transmitting terminal beam cross section, and can provide the gain of detector more than 100 times.The receipts light region of avalanche photodide or photon multiplier tube (photo-detector) is positioned at this lens paraxial focus place.Fig. 5 is the end view of these receiving terminal lens, and 13 is receiving terminal lens side outlines.
Effect of the present invention can as seen from Figure 6, adopt oval cross section transmitted beam with accept visual field than common circular cross-section to accept energy high by 50%; Wherein, oval major and minor axis ratio can be fixed, and such as, can be 2:1, the now impulse response of channel have too large change (as shown in Figure 7) compared with before; The curve being summit with circular "○" in Fig. 6 represents the energy that circular cross-section receives, the curve being summit with rectangle " " represents the energy that square-section receives, and the curve being summit with triangle " ▽ " represents the energy that elliptic cross-section provided by the present invention receives.Rectangle and circular cross section are just used as an example of simulation analysis herein, and it also illustrate that the evolution of technology involved in the present invention on the one hand.
On the other hand, in the embodiment of the present invention, light-emitting diode is ultraviolet light-emitting diode, also can change the blue green LED that wavelength is 470 nanometers or 533 nanometers into; The light of material demand fulfillment to 470-535 nanometer of light-distribution lens has higher penetrance, current most optical glass material can meet this requirement, and the curved surface of light-distribution lens makes corresponding minor modifications, multiple such illuminating module can be combined, the underwater visible light communication environment of convenient application.Major part under water visible light communication still based on horizon communication, but in some specific application environment, be conducive to as a supplement increasing the position freedom of communication link sending and receiving end with the channel of non line of sight scatter communication under water.At present, on document, the luminous intensity distribution design under water on visible light communication device still can only see conical luminous intensity distribution, and therefore, case of the present invention also has significant innovation for non line of sight Multiple Scattering communication under water.
The above; be only the present invention's preferably embodiment, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claims.
Claims (7)
1. one kind is applicable to the optoelectronic transceiver device of non line of sight scatter communication, it is characterized in that, comprising: a plural number light-emitting diode, the transmitting terminal lens being placed in a described plural number light-emitting diode front end, receiving terminal lens and be placed in the photo-detector of receiving terminal lens rear;
Wherein, a described plural number light-emitting diode outwards sends the ultraviolet light beam with oval cross section by transmitting terminal lens; The field of view of receiver angle cross section of described receiving terminal lens is the ellipse matched with described transmitting terminal lens emitting ultraviolet light area of beam, has the ultraviolet light beam of oval cross section by incident light detector after these receiving terminal lens.
2. sending and receiving end as claimed in claim 1 lens, is characterized in that, the ratio of semi-minor axis length of described oval cross section keeps fixing.
3. sending and receiving end as claimed in claim 1 or 2 lens, it is characterized in that, the ratio of semi-minor axis length of described oval cross section is 2:1.
4. photo-detector as claimed in claim 1, it is characterized in that, described photo-detector comprises: photomultiplier or Avalanche Photo Diode.
5. light-emitting diode as claimed in claim 1, it is characterized in that, the wavelength of described light-emitting diode is between 260 nanometers to 280 nanometers.
6. light-emitting diode as claimed in claim 1, it is characterized in that, the dominant wavelength of described light-emitting diode is between 460 nanometers to 535 nanometers.
7. printed circuit board (PCB) as claimed in claim 1, is characterized in that, a described plural number light-emitting diode adopts surface mount process to be arranged on the rectangular printed circuit board of ceramic material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510023990.5A CN104539369B (en) | 2015-01-16 | 2015-01-16 | Photoelectric receiving and transmitting device applicable to non-line-of-sight scattering communication |
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| CN201510023990.5A CN104539369B (en) | 2015-01-16 | 2015-01-16 | Photoelectric receiving and transmitting device applicable to non-line-of-sight scattering communication |
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| CN104539369A true CN104539369A (en) | 2015-04-22 |
| CN104539369B CN104539369B (en) | 2017-05-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112187357A (en) * | 2020-09-15 | 2021-01-05 | 清华大学深圳国际研究生院 | Deep ultraviolet omnidirectional communication channel modeling method and system based on Monte Carlo method |
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| US20020154879A1 (en) * | 2001-04-23 | 2002-10-24 | Naru Yasuda | Optical device, and optical transceiver and other optical apparatuses using the optical device |
| WO2005055436A2 (en) * | 2003-12-03 | 2005-06-16 | Rad-Op Ltd. | Transceiver for optical transmission |
| CN1933372A (en) * | 2006-10-16 | 2007-03-21 | 中国科学院上海光学精密机械研究所 | Method and apparatus for infrared laser atmospheric scattering communication |
| CN103209024A (en) * | 2013-02-04 | 2013-07-17 | 中国人民解放军理工大学 | Device and method for wireless light scattering communication on basis of Mie scattering |
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2015
- 2015-01-16 CN CN201510023990.5A patent/CN104539369B/en active Active
Patent Citations (4)
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|---|---|---|---|---|
| US20020154879A1 (en) * | 2001-04-23 | 2002-10-24 | Naru Yasuda | Optical device, and optical transceiver and other optical apparatuses using the optical device |
| WO2005055436A2 (en) * | 2003-12-03 | 2005-06-16 | Rad-Op Ltd. | Transceiver for optical transmission |
| CN1933372A (en) * | 2006-10-16 | 2007-03-21 | 中国科学院上海光学精密机械研究所 | Method and apparatus for infrared laser atmospheric scattering communication |
| CN103209024A (en) * | 2013-02-04 | 2013-07-17 | 中国人民解放军理工大学 | Device and method for wireless light scattering communication on basis of Mie scattering |
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| 徐正元: "可见光及紫外无线光通信技术研究进展", 《第十届全国光电技术学术交流会论文集 》 * |
Cited By (1)
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| CN112187357A (en) * | 2020-09-15 | 2021-01-05 | 清华大学深圳国际研究生院 | Deep ultraviolet omnidirectional communication channel modeling method and system based on Monte Carlo method |
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