CN207263919U - Indoor locating system based on visible light communication - Google Patents
Indoor locating system based on visible light communication Download PDFInfo
- Publication number
- CN207263919U CN207263919U CN201720642442.5U CN201720642442U CN207263919U CN 207263919 U CN207263919 U CN 207263919U CN 201720642442 U CN201720642442 U CN 201720642442U CN 207263919 U CN207263919 U CN 207263919U
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- China
- Prior art keywords
- receiving terminal
- visible light
- locating system
- light communication
- indoor locating
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Abstract
The utility model discloses a kind of indoor locating system based on visible light communication, transmitting terminal control light source realizes the light and shade alternating of light source with required rule and frequency power on/off, so as to send the optical information comprising certain synchronization code character and intensity signal to receiving terminal；After receiving terminal is properly received synchronous code group information, by measuring each intensity signal and carrying out computing, the elements of a fix are drawn；Transmitting terminal includes sequentially connected development platform, transmitting terminal development board, voltage amplifier circuit, light source, regulated power supply；Receiving terminal includes sequentially connected illuminance sensor, receiving terminal development board.The utility model has wide coverage rate, energy-saving, healthy and safe, directed radiation, lays outstanding advantages of simple, of low cost, Electro Magnetic Compatibility is good, with illumination and it can position dual-purpose, power consumption is low, condition readily satisfies, with good generalization, since optical signal cannot pass through wall, so with higher confidentiality, and strong antijamming capability, concealment are high.
Description
Technical field
It the utility model is related to technical field of visible light communication, and in particular to a kind of indoor positioning based on visible light communication
System.
Background technology
With the development of the times, indoor positioning is increasingly becoming the problem of hot topic, but both at home and abroad for indoor positioning
Research it is still at an early stage, existing indoor positioning technologies, in use cost, application range and portability etc. also not
Can meet the needs of popular.Traditional localization method mainly realizes positioning using GPS.GPS has been widely used in outdoor at present
In location navigation, and there is good positioning accuracy.However, the decay due to intensity when multipath effect and signal pass through wall
Etc. the influence of factor, the precision and stability during GPS is positioned indoors is very undesirable.The past 10 years, based on radio wave skill
Art proposes many indoor positioning schemes, mainly has：RFID, UWB, WI-FI, ultrasonic system, Bluetooth technology, infrared technique etc..
But the limitation of radio wave is also due to, these technologies also have the shortcomings that many inevitable.
Utility model content
In view of this, in order to solve the above problem of the prior art, led to the utility model proposes one kind based on visible ray
The indoor locating system of letter.
The utility model is solved the above problems by following technological means：
A kind of indoor locating system based on visible light communication, including transmitting terminal and receiving terminal；
Transmitting terminal control light source realizes the light and shade alternating of light source with required rule and frequency power on/off, so as to send
Optical information comprising certain synchronization code character and intensity signal is to receiving terminal；After receiving terminal is properly received synchronous code group information, pass through
Measure each intensity signal and carry out computing, draw the elements of a fix；
The transmitting terminal includes sequentially connected development platform, transmitting terminal development board, voltage amplifier circuit, light source, voltage stabilizing
Power supply；
The receiving terminal includes sequentially connected illuminance sensor, receiving terminal development board.
Further, the development platform is PC IAR development platforms.
Further, the transmitting terminal development board is MSP430F149 chips.
Further, the voltage amplifier circuit use voltage amplification factor for 5 negative feedback amplifier circuit.
Further, the light source is 4, using low pressure 12VLED lamp plates.
Further, the illuminance sensor uses TEMT6000 illuminance sensors.
Further, the receiving terminal development board includes ADC analog-digital converters.
Compared with prior art, the beneficial effects of the utility model are as follows：
Indoor positioning technologies of the utility model based on LED visible light communication, it is unexistent huge excellent with above technology
Gesture.With coverage rate is wide, energy-saving, healthy and safe, directed radiation, lays simple, of low cost, Electro Magnetic Compatibility is good etc.
Outstanding advantages.This technology uses LED as light source, with illumination and can position dual-purpose, power consumption is low, and condition readily satisfies, tool
There is good generalization.And extra ancillary equipment need not be in addition laid with substantially, as long as terminal is equipped with photelectric receiver just
The visible optical information that transmitting terminal is sent can be received；Due also to optical signal cannot pass through wall, so with higher confidentiality；
And its strong antijamming capability, concealment are high, from Electromagnetic Interference, it can be used for that indoor, densely populated and some to forbid radio frequency
Occasion.
Brief description of the drawings
It is required in being described below to embodiment in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing to be used is briefly described, it should be apparent that, drawings in the following description are only some realities of the utility model
Example is applied, for those of ordinary skill in the art, without creative efforts, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the structure diagram of indoor locating system of the utility model based on visible light communication；
Fig. 2 is the digital quantity and receiving terminal to lamp distance for the magnitude of voltage that the light intensity that the utility model receiving terminal receives produces
Functional relation schematic diagram；
Fig. 3 is schematic diagram of the utility model measurement receiving terminal relative to origin；
Fig. 4 is that the utility model has divided the schematic diagram that 44 points carry out coordinate points measurement in region；
Fig. 5 is the Error Graph that the utility model is drawn according to matlab.
Embodiment
To enable the above-mentioned purpose of the utility model, feature and advantage more obvious understandable, below in conjunction with attached drawing and
The technical solution of the utility model is described in detail in specific embodiment.It is pointed out that described embodiment is only
Only it is the utility model part of the embodiment, instead of all the embodiments, based on the embodiment in the utility model, this area
Those of ordinary skill's all other embodiments obtained without making creative work, belong to the utility model
The scope of protection.
As shown in Figure 1, the utility model provides a kind of indoor locating system based on visible light communication, including transmitting terminal
And receiving terminal；
Transmitting terminal control light source realizes the light and shade alternating of light source with required rule and frequency power on/off, so as to send
Optical information comprising certain synchronization code character and intensity signal is to receiving terminal；After receiving terminal is properly received synchronous code group information, pass through
Measure each intensity signal and carry out computing, draw the elements of a fix；
The transmitting terminal includes sequentially connected development platform, transmitting terminal development board, voltage amplifier circuit, light source, voltage stabilizing
Power supply；Light source is 4；
The receiving terminal includes sequentially connected illuminance sensor, receiving terminal development board.
1st, system principle is discussed
In transmitting terminal development board, transmitting signal is directly generated and after ovennodulation by msp430f149 microcontrollers, by a high speed
I/O mouthfuls of outputs.By power amplification and LED drive circuit, send 4 LED light sources and light and shade change is carried out according to modulated signal
The optical signal of change.In receiving terminal, analog voltage signal is converted optical signals to by TEMT6000 illuminance sensors, then by
ADC converters are converted to digital signal inside msp430f149, transfer to microcontroller to carry out calculation process, draw elements of a fix value.
2nd, system design
2.1 VLC transmitting terminals design：
2.1.1 PC IAR development platforms：IAR Embedded Workbench are that IAR Systems companies of Sweden are micro-
An Integrated Development Environment (hereinafter referred to as IAR EW) for processor exploitation, supports ARM, the chip core such as AVR, MSP430 is put down
Platform.Use it as the main development platforms of MSP430.
2.1.2 development board：It is that one kind is based on MSP430F149 as core to use glad wound electronics technology genuine product DM430-L
The minimum system plate of control chip, it is mainly characterized by taking pinboard form and is integrated with stable USB type BSL downloaders,
Can a direct line download, avoid the great number cost brought using emulator, while all I/O ports are arranged in the form of contact pin, are connect
Mouth aboundresources, chip are controlled using separable design using the data message that stabilization, PC machine etc. are sent in 430 microcontrollers
Lower stable output specific coding signal.
2.1.3 voltage amplifier circuit：Use voltage amplification factor for 5 negative feedback amplifier circuit, by I/O port output voltage
It is amplified, goes out for controlling large-power lamp to dodge.
2.1.4 light source：Using low pressure 12VLED lamp plates, add aluminum substrate well-designed using 5730 chip of import high brightness
Form, single plate totally 90 5730, general power 45W, there is high-brightness energy saving, service life length, excellent heat dissipation performance, efficient
The features such as.In design, we are greatly improved visible optical receiving end using single lamp plate as a light source, round panel design
Range of receiving and distance.
2.2 VLC receiving terminals design：
2.2.1 illuminance sensor：Visible ray is received, converts optical signal into electric signal, transfer linearity degree is good, response speed
Degree is fast, price is low, operating voltage is low (3.3V).The maximum sensitivity of TEMT6000 inductors is 570nm, it is with ± 60 °
Wider half sensitivity angle.Although the device is very sensitive to ambient light, it can inhibit infrared ray (IR) spectrum, so as to carry
For the higher visible spectrum responses of similar " human eye ", it is adapted to this requirement of system design.
2.2.2 receiving terminal development board：It is onboard to carry ADC analog-digital converters, magnitude of voltage can be accurately converted into digital quantity, it is first
The first docking collection of letters number is sampled judgement, correctly detects after examining head, receives four groups of lamps successively and produces voltage digital amounts, uses
RSSI ranging schemes, calculate four corresponding distances and incoming designed, designed coordinate computation function by plug-in, draw
Coordinate amount, and be output to 1602 display screens and show, show present coordinate values.
3rd, experimental data and error analysis
3.1 experimental data
Experimental site is to be filled with LED light at the space of a 175cm*175cm*250cm, four angles, be connected to transmitting terminal,
Receiving terminal fixes height (50cm) in space and receives signal.
3.1.1 distance calculation formula
As shown in Fig. 2, the digital quantity for the magnitude of voltage that the light intensity received by recording receiving terminal produces is arrived with measurement receiving terminal
The distance of lamp produces one group of data, and digital quantity (x)-distance (y) function is drawn after fitting：Y=0.0042x2-2.0584x+
456.65。
3.1.2 coordinate calculation formula：
As shown in figure 3, by the air line distance and height of receiving terminal and four lamps, the water of receiving terminal and lamp can be calculated
Flat distance, recycles cosine law d2 2=d1 2+a2-2d1Acos α, and trigonometric functionX1, x2, y1, y2 can be obtained, it is finally average once to can be received end (point
O) the opposite coordinate with origin (point C).
3.2 measurement data
As shown in figure 4, the measurement that 44 points carry out coordinate points is divided in region.
Table 1 below is the data (part) of measurement, and Fig. 5 is the Error Graph drawn according to matlab.
Table 1：
4.3 error analysis：
Because place is arranged in beside wall, the light intensity that the reflected light of wall can cause receiver to receive is inaccurate, with
And LED light control line suspention in the air to light it is a little block cause the error amount of subregion higher and error distribution it is not right
Claim.
Normal error then comes from digital quantity-range formula, due to can not accurately know the lamps and lanterns of each type
Light intensity attenuation and receiving terminal produce relation between the digital quantity of voltage, the formula of the utility model belongs to the warp voluntarily measured
Formula is tested, the fitted trend that can only be tried one's best, generates error.The system is successfully by LED visible light communication Technology application in interior
Positioning, the error of reality has been measured by experiment, this is feeling free to try from theory into action, is also achieved ideal
Achievement.
Indoor positioning technologies of the utility model based on LED visible light communication, it is unexistent huge excellent with above technology
Gesture.With coverage rate is wide, energy-saving, healthy and safe, directed radiation, lays simple, of low cost, Electro Magnetic Compatibility is good etc.
Outstanding advantages.This technology uses LED as light source, with illumination and can position dual-purpose, power consumption is low, and condition readily satisfies, tool
There is good generalization.And extra ancillary equipment need not be in addition laid with substantially, as long as terminal is equipped with photelectric receiver just
The visible optical information that transmitting terminal is sent can be received；Due also to optical signal cannot pass through wall, so with higher confidentiality；
And its strong antijamming capability, concealment are high, from Electromagnetic Interference, it can be used for that indoor, densely populated and some to forbid radio frequency
Occasion.
Embodiment described above only expresses the several embodiments of the utility model, its description is more specific and detailed,
But it should not be interpreted as limiting the scope of the present invention.It should be pointed out that for the common of this area
For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these all belong to
In the scope of protection of the utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (7)
1. a kind of indoor locating system based on visible light communication, it is characterised in that including transmitting terminal and receiving terminal；
Transmitting terminal control light source realizes the light and shade alternating of light source with required rule and frequency power on/off, is included so as to send
The optical information of certain synchronization code character and intensity signal is to receiving terminal；After receiving terminal is properly received synchronous code group information, pass through measurement
Each intensity signal simultaneously carries out computing, draws the elements of a fix；
The transmitting terminal includes sequentially connected development platform, transmitting terminal development board, voltage amplifier circuit, light source, regulated power supply；
The receiving terminal includes sequentially connected illuminance sensor, receiving terminal development board.
2. the indoor locating system according to claim 1 based on visible light communication, it is characterised in that the development platform
For PC IAR development platforms.
3. the indoor locating system according to claim 1 based on visible light communication, it is characterised in that the transmitting terminal is opened
Hair plate is MSP430F149 chips.
4. the indoor locating system according to claim 1 based on visible light communication, it is characterised in that the voltage amplification
Circuit use voltage amplification factor for 5 negative feedback amplifier circuit.
5. the indoor locating system according to claim 1 based on visible light communication, it is characterised in that the light source is 4
It is a, using low pressure 12VLED lamp plates.
6. the indoor locating system according to claim 1 based on visible light communication, it is characterised in that the illuminance passes
Sensor uses TEMT6000 illuminance sensors.
7. the indoor locating system according to claim 1 based on visible light communication, it is characterised in that the receiving terminal is opened
Hair plate includes ADC analog-digital converters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720642442.5U CN207263919U (en) | 2017-06-05 | 2017-06-05 | Indoor locating system based on visible light communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720642442.5U CN207263919U (en) | 2017-06-05 | 2017-06-05 | Indoor locating system based on visible light communication |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207263919U true CN207263919U (en) | 2018-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720642442.5U Expired - Fee Related CN207263919U (en) | 2017-06-05 | 2017-06-05 | Indoor locating system based on visible light communication |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113959429A (en) * | 2021-10-08 | 2022-01-21 | 中南民族大学 | Indoor visible light positioning system and method based on image sensing technology |
-
2017
- 2017-06-05 CN CN201720642442.5U patent/CN207263919U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113959429A (en) * | 2021-10-08 | 2022-01-21 | 中南民族大学 | Indoor visible light positioning system and method based on image sensing technology |
| CN113959429B (en) * | 2021-10-08 | 2024-03-26 | 中南民族大学 | Indoor visible light positioning system and method based on image sensing technology |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180420 Termination date: 20190605 |
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| CF01 | Termination of patent right due to non-payment of annual fee |