CN110133685B - OCC-based street lamp auxiliary mobile phone detailed positioning communication system - Google Patents
OCC-based street lamp auxiliary mobile phone detailed positioning communication system Download PDFInfo
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- CN110133685B CN110133685B CN201910431465.5A CN201910431465A CN110133685B CN 110133685 B CN110133685 B CN 110133685B CN 201910431465 A CN201910431465 A CN 201910431465A CN 110133685 B CN110133685 B CN 110133685B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/14—Receivers specially adapted for specific applications
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
- H04B10/114—Indoor or close-range type systems
- H04B10/116—Visible light communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/02—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/724—User interfaces specially adapted for cordless or mobile telephones
- H04M1/72403—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality
Abstract
The invention relates to a street lamp auxiliary mobile phone detailed positioning communication system based on OCC.A background operation center of the system uploads detailed positioning webpage information corresponding to the positions of all LED street lamps, registered and generated webpage URL addresses and webpage codes thereof to a server, and sends all the webpage URL addresses to the corresponding LED street lamps; the LED street lamp generates a modulation signal by encoding according to the webpage URL address, and drives the LED lamp to flicker at a high speed according to the modulation signal; and the browser App of the mobile phone terminal calls a mobile phone camera to acquire a section of video and solve a webpage URL address, and receives detailed positioning webpage information of the webpage URL address from the server through the 4G and 5G interfaces. The street lamp can be used for assisting the mobile phone to perform detailed positioning, and the browser App calls the mobile phone camera to receive the webpage URL address so as to display specific house number information near the street.
Description
Technical Field
The invention belongs to the technical field of visible light imaging communication, and relates to a street lamp auxiliary mobile phone detailed positioning communication system based on an OCC (optical communications center).
Background
With the rapid development of LED lamps and the popularization of mobile phone cameras, in recent years, the development of visible light imaging communication (Optical camera communication) technology has been rapid. The sending end utilizes the existing LED lamp, and the receiving end utilizes the cell-phone camera. Compared with the high price of Visible Light Communication (VLC) equipment and infrared equipment, the cost of the OCC technology is only a few of virtual software, the equipment cost is not high, only the development cost is high, and the OCC technology is easy to popularize. In addition, the OCC technology, as a branch of VLC technology, has the advantages of VLC technology: 1, the visible light band is not controlled by the radio tube manufacturing method, and the use of the band is not required. 2, the visible radiation as the lighting source can not cause harm to human body. 3, the characteristic that the modulation and demodulation does not need complex calculation is suitable for the Internet of Things (IoT) equipment.
With the continuous maturity of the mobile phone GPS positioning technology, specific street positioning can be realized. However, more accurate house number positioning is still not possible.
Disclosure of Invention
The invention aims to provide a street lamp auxiliary mobile phone detailed positioning communication system based on an OCC (optical communications center). The system utilizes the existing LED street lamp and a mobile phone terminal, gives full play to the advantages of the OCC technology, and can more accurately position house doorplates.
In order to solve the technical problem, the street lamp auxiliary mobile phone detailed positioning communication system based on the OCC comprises a background operation center, a plurality of LED street lamps, a mobile phone terminal with a camera shooting function and a server; the background operation center uploads detailed positioning webpage information corresponding to the positions of the LED street lamps, webpage URL addresses generated by registration and webpage codes thereof to a server, and sends the webpage URL addresses to the corresponding LED street lamps in a wireless communication mode; the LED street lamp comprises a street lamp side wireless communication module, a storage unit, a control unit, an LED driving module and an LED lamp; the webpage URL address sent by the background operation center is stored in a storage unit; the control unit encodes according to the webpage URL address in the storage unit to generate a modulation signal and controls the LED driving module to drive the LED lamp to flicker at a high speed according to the modulation signal; and calling a mobile phone camera by a browser App of the mobile phone terminal to acquire a section of video and solve a webpage URL address, and receiving detailed positioning webpage information of the webpage URL address from the server through a 4G or 5G interface.
The background operation center can also send simple text information corresponding to the LED street lamp position to the corresponding LED street lamp in a wireless communication mode.
And the mobile phone terminal decodes the simple text information corresponding to the position of the LED street lamp according to the acquired video.
The detailed positioning webpage information comprises specific house number information of buildings near the street.
The detailed positioning webpage information also comprises block culture information, nearby characteristic travel information and advertisement information of the positions of the LED street lamps.
The method for acquiring the webpage URL address by the mobile phone terminal according to the shot LED street lamp video information comprises the following steps:
firstly, calling a mobile phone camera by a browser App to acquire a section of video; then, dividing the video into a frame of image and converting each frame of image into a gray scale image; comparing the average gray value of each frame of image light source area with a set threshold value, and judging the bright-dark state of the light source as 01 sequence codes; determining the position of the LED lamp in the image by utilizing the existence of a section of pilot frequency in the video; judging whether the LED lamp is successfully positioned, if not, acquiring the video again, and if so, continuing processing; solving a 01 sequence code according to the brightness state of the pilot frequency subsequent LED lamp; and decoding the URL address of the webpage according to the 01 sequence code.
The invention has the beneficial effects that:
when an individual searches for a specified destination, the mobile phone GPS map positioning can only be used for positioning to a specified street. The street lamp can be used for assisting the mobile phone to perform detailed positioning, the mobile phone camera is called through the browser App to receive the webpage URL address so as to display the specific house number information near the street, the scenery around the LED street lamp is compared, the detailed positioning is realized, the destination is found, and the trouble that the specific destination cannot be found and the time is wasted when the street lamp walks around is avoided. In addition, the webpage is not limited to the detailed positioning information, and can also contain block culture information, nearby characteristic travel information and advertisement information, and more characteristic information nearby the blocks can be issued while the detailed positioning is realized.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a block diagram of a street lamp auxiliary mobile phone detailed positioning communication system based on an OCC of the present invention.
The reference numerals in fig. 1 include:
1-background operation center 2-LED street lamp 3-mobile phone terminal 4-server.
Fig. 2 is a flow chart of the mobile phone terminal program.
Detailed Description
The preferred embodiments of the invention are detailed below:
as shown in fig. 1, the mobile phone positioning communication system assisted by the street lamp based on the OCC of the present invention includes a background operation center 1, an LED street lamp 2, a mobile phone terminal 3 with a camera function, and a server 4.
The background operation center 1 comprises a webpage content storage module and a background side wireless communication module; webpage contents corresponding to the positions of the LED street lamps 2, which are compiled by operators, comprise detailed positioning webpage information, registered generated webpage URL addresses and webpage codes thereof, and are stored in a webpage content storage module; the detailed positioning webpage information comprises specific number information of buildings near the street where the LED street lamp 2 is located, block culture information, near characteristic travel information, advertisement information and the like; and uploading the detailed positioning webpage corresponding to each LED street lamp 2, the webpage URL address generated by registration and the webpage code thereof to the server 4. And the webpage URL address stored in the webpage content storage module is sent to the corresponding LED street lamp 2 through the background side wireless communication module.
The information sent to the LED street lamp 2 through the background side wireless communication module is not limited to the URL address of the web page, but may also include simple text information (for example, information such as a house number and a text description of a street location where the LED street lamp 2 is located).
The LED street lamp 2 comprises a street lamp side wireless communication module, a storage unit, a control unit, an LED driving module and an LED lamp. The street lamp side wireless communication module receives the webpage URL address sent from the background operation center 1 and stores the webpage URL address into the storage unit; the control unit encodes according to the webpage URL address in the storage unit to generate a modulation signal, and controls the LED driving module to drive the LED lamp to flicker at a high speed according to the modulation signal without generating stroboflash.
The LED lamp flashes at a high speed to transmit the carried webpage URL address to the mobile phone terminal 3 through an optical channel, an OCC technology is utilized, information is transmitted by controlling the LED lamp to flash at a high speed, and the bright and dark state of the flash at a high speed can be captured by a mobile phone camera. The mobile phone analyzes the webpage URL address transmitted by the LED lamp through the browser App. Compared with the high price of visible light communication equipment and infrared equipment, the OCC technology only has the cost of some virtual software, no equipment cost and only development cost, and is easier to popularize.
The mobile phone terminal 3 needs to include a camera function, the OCC function expansion is carried out on the browser App, the mobile phone camera function is called, a webpage URL address from the LED street lamp is received, the webpage URL address is returned to the browser App to display a detailed positioning page, the mobile phone terminal 3 receives webpage content of the detailed positioning webpage from the server through a 4G or 5G interface according to the webpage URL address, and specific number information, street culture information, nearby characteristic tourism information, advertisement information and the like of a building near a street where the LED street lamp 2 is located.
Smartphones have gained widespread popularity and users only spend the brief time required to download an App process software. Therefore, the invention is easy to be popularized and applied at the user side by the characteristics of low cost, convenience, rapidness and the like.
The mobile phone terminal 3 receives complex webpage content information of a detailed positioning webpage from the server by using the webpage URL address in combination with the 4G or 5G interface. The webpage content is not limited to the detailed positioning information, but also can be block culture information, nearby characteristic travel information and advertisement information, and more characteristic information nearby blocks is issued while the detailed positioning is realized. At present, the propaganda mode of nearby characteristic information is limited to the modes of issuing a leaflet, posting paper advertisements and the like, so that the market appearance is influenced, and wood resources are wasted. The invention utilizes the existing LED street lamp 2 and the mobile phone terminal 3 to give full play to the advantages of OCC technology, sends some extra information of the position to mobile phone users, virtualizes the propaganda mode, can promote the economic development of nearby characteristic industries, beautify the market appearance and avoid wasting entity propaganda.
As shown in fig. 2, the flow chart of the mobile phone terminal program is as follows:
firstly, calling a mobile phone camera by a browser App to acquire a section of video; then, dividing the video into a frame of image; then, converting each frame of image into a gray scale image, wherein the brightness value level of each pixel point is 0-255; a pilot frequency exists in the video, and the position of the LED lamp in the image is determined by the pilot frequency; judging whether the LED lamp is successfully positioned, if not, acquiring the video again, and if so, continuing processing; comparing the average gray value of each frame of image light source area with a set threshold value, and judging the bright-dark state of the light source as 01 sequence codes; solving a 01 sequence code according to the light and shade state of the subsequent LED lamp of the pilot frequency; and finally, decoding the URL address of the webpage according to the 01 sequence code.
The problem of light source positioning: the invention takes an image difference method as an example, two pilot symbol signals are used for positioning, the two pilot symbol signals are respectively 1 and 0, one symbol signal is transmitted by one frame picture, and then the two symbol signals are displayed in the two pictures, one light source is bright and the other light source is dark. Furthermore, the difference between the two pictures can find the different positions of the two pictures, namely the positions of the light sources, so that the positioning is realized.
Problem of light source stroboscopic: stroboscopic effects can occur if the frequency of light and dark flashes of the light source is slow. Therefore, to solve this problem, many under-sampling schemes have been proposed, such as under-sampling frequency shift keying, under-sampling phase shift keying, under-sampling amplitude modulation, and the like.
The invention uses undersampling phase shift keying to explain, in order to avoid the problem of stroboscopic, we make the light source at the sending end flash at high speed, that is, send a section of high-frequency square wave. Each code element occupies a plurality of square wave signals, the initial waveform of the code word 1 is 1, and the initial waveform of the code word 0 is 0. The mobile phone camera performs sampling at equal intervals in a global exposure mode, and different sampling results of 0 and 1 can be obtained. The stroboscopic problem can be solved, and data can be transmitted correctly.
There are two main directions of research in visible light imaging communication. One is an OCC communication system based on global exposure, the communication distance can reach more than 10 meters, but the communication speed is slow. The other is a rolling shutter exposure based OCC communication system, the communication distance is within 2 meters, but the communication speed is faster. At present, the height of the street lamp is generally between 4 meters and 10 meters, so the invention can be realized by adopting a global exposure mode.
At present, LED street lamps, building lamps and architectural decorative lighting are distributed in large corners of a city, and existing LED lamps can be completely utilized to realize the detailed positioning of an LED lamp auxiliary mobile phone. In addition, the LED lamp and the mobile phone are communicated by using OCC technology, and the user only spends a short time required for downloading App processing software. Therefore, the street lamp auxiliary mobile phone detailed positioning communication system is easy to popularize and apply at a user side due to the characteristics of low cost, convenience, rapidness and the like. Furthermore, the radio frequency communication mobile phone GPS positioning can acquire the street information near the destination in a large range, however, the OCC technology can only communicate in the illumination range, and only under the LED lamp can the specific number information of the house near the LED lamp be acquired, and the scene around the LED lamp is compared, so that more specific positioning is realized. Greater benefits can be achieved by combining LED lamps with OCC technology, however, such OCC communication systems have not been reported. The invention is suitable for covering all large streets and has lower cost. The detailed implementation process of the invention is explained above with reference to the drawings, but the invention is not only used for assisting the detailed positioning of the mobile phone. The street culture, the tourism information with the characteristics nearby and the advertisement information can be displayed according to the URL address of the webpage, and the LED street lamp can be used for sending information to a mobile phone according to the idea of sending information to the mobile phone without departing from the principle of a visible light imaging street lamp communication system, so that the LED street lamp and the mobile phone are within the protection scope of the invention.
Claims (5)
1. A street lamp auxiliary mobile phone detailed positioning communication system based on an OCC (optical communications center) is characterized by comprising a background operation center (1), a plurality of LED street lamps (2), a mobile phone terminal (3) with a camera shooting function and a server (4); the background operation center (1) uploads detailed positioning webpage information corresponding to the positions of the LED street lamps (2), webpage URL addresses generated by registration and webpage codes thereof to the server (4), and sends the webpage URL addresses to the corresponding LED street lamps (2) in a wireless communication mode; the LED street lamp (2) comprises a street lamp side wireless communication module, a storage unit, a control unit, an LED driving module and an LED lamp; the webpage URL address sent by the background operation center (1) is stored in a storage unit; the control unit encodes according to the webpage URL address in the storage unit to generate a modulation signal and controls the LED driving module to drive the LED lamp to flicker at a high speed according to the modulation signal; a browser App of the mobile phone terminal (3) calls a mobile phone camera to acquire a section of video and solve a webpage URL address, and receives detailed positioning webpage information of the webpage URL address from the server (4) through a 4G or 5G interface; the method for obtaining the webpage URL address by the mobile phone terminal (3) according to the shot LED street lamp video information comprises the following steps:
firstly, calling a mobile phone camera by a browser App to acquire a section of video; then, dividing the video into a frame of image and converting each frame of image into a gray scale image; comparing the average gray value of each frame of image light source area with a set threshold value, and judging the bright-dark state of the light source as 01 sequence codes; determining the position of the LED lamp in the image by using a section of pilot frequency existing in the video; judging whether the LED lamp is successfully positioned, if not, acquiring the video again, and if so, continuing to process; solving a 01 sequence code according to the brightness state of the pilot frequency subsequent LED lamp; and decoding the URL address of the webpage according to the 01 sequence code.
2. The OCC-based street lamp assistant mobile phone detailed positioning communication system as claimed in claim 1, wherein the background operation center (1) is further capable of sending simple text information corresponding to the position of the LED street lamp (2) to the corresponding LED street lamp (2) in a wireless communication manner.
3. The OCC-based street lamp assistant mobile phone detailed positioning communication system as claimed in claim 2, wherein the mobile phone terminal (3) is configured to decode the simple text information corresponding to the position of the LED street lamp (2) according to the obtained video.
4. The OCC-based street lamp assistant handset detailed location communication system as claimed in claim 1, wherein the detailed location web page information comprises specific number information of buildings near the street.
5. The OCC-based street lamp assistant handset detailed positioning communication system as claimed in claim 4, wherein the detailed positioning webpage information further comprises street culture information, nearby characteristic travel information and advertisement information of the location of each LED street lamp (2).
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| FR2718874B1 (en) * | 1994-04-15 | 1996-05-15 | Thomson Csf | Traffic monitoring method for automatic detection of vehicle incidents. |
| US7455590B2 (en) * | 2003-05-09 | 2008-11-25 | Microsoft Corporation | Sending messages in response to events occurring on a gaming service |
| JP2009036571A (en) * | 2007-07-31 | 2009-02-19 | Toshiba Corp | Position measuring system utilizing visible light communication system, position measuring device, and position measuring method |
| CN101593436B (en) * | 2009-06-26 | 2011-05-04 | 江苏大学 | LED traffic lamp visible light communication-based blind traffic warning system |
| CN102904639A (en) * | 2012-11-05 | 2013-01-30 | 北京半导体照明科技促进中心 | Visible light communication system, and transmitting device and receiving device thereof |
| CN203574655U (en) * | 2013-04-09 | 2014-04-30 | 北京半导体照明科技促进中心 | Device and system for transmitting information through visible light and light source |
| CN103220760A (en) * | 2013-04-24 | 2013-07-24 | 吉林大学 | OW-RF fusion system and cross-domain communication method based on same |
| CN104331034A (en) * | 2014-09-28 | 2015-02-04 | 东莞勤上光电股份有限公司 | LED street lamp positioning system based on visible light communication |
| CN104681692A (en) * | 2014-12-31 | 2015-06-03 | 深圳市晶台股份有限公司 | LED photo-communication and driving integration packaging optical engine technology and application |
| CN105355047B (en) * | 2015-11-03 | 2017-06-06 | 吉林大学 | The Data Fusion method of many Vehicle Detection source dynamic time granularities |
| CN105783914A (en) * | 2016-03-20 | 2016-07-20 | 文成县刀锋科技有限公司 | Visible light communication-based indoor navigation system |
| US20180098215A1 (en) * | 2016-09-30 | 2018-04-05 | Richard D. Roberts | Data processing and authentication of light communication sources |
| CN107238831A (en) * | 2017-07-20 | 2017-10-10 | 中航联创科技有限公司上海分公司 | The shop orientation navigation system communicated based on Visible Light Camera |
| CN107219517A (en) * | 2017-07-25 | 2017-09-29 | 中航联创科技有限公司上海分公司 | Mobile phone Android camera alignment system and its method based on LED visible light communication |
| CN107991649A (en) * | 2017-10-31 | 2018-05-04 | 吉林大学 | Visible ray indoor positioning device |
| CN108092718A (en) * | 2017-12-27 | 2018-05-29 | 河南中云创光电科技股份有限公司 | Visible soft exchange network communication system based on high-power illumination LED light |
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