CN109029462A - A kind of high accuracy positioning navigation system based on WI-FI hot spot - Google Patents
A kind of high accuracy positioning navigation system based on WI-FI hot spot Download PDFInfo
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- CN109029462A CN109029462A CN201810897504.6A CN201810897504A CN109029462A CN 109029462 A CN109029462 A CN 109029462A CN 201810897504 A CN201810897504 A CN 201810897504A CN 109029462 A CN109029462 A CN 109029462A
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- hot spot
- high accuracy
- navigation system
- positioning navigation
- power distributor
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- 230000005540 biological transmission Effects 0.000 claims abstract description 7
- 238000006243 chemical reaction Methods 0.000 claims abstract description 4
- 239000013307 optical fiber Substances 0.000 claims description 11
- 239000007787 solid Substances 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/20—Instruments for performing navigational calculations
- G01C21/206—Instruments for performing navigational calculations specially adapted for indoor navigation
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Automation & Control Theory (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
Abstract
The present invention discloses a kind of high accuracy positioning navigation system based on WI-FI hot spot, it is characterized in that, it include: reference clock module, encoder, oscillator, multi-path power divider and several WI-FI hot spots, the reference clock module is connect with encoder, the encoder, oscillator is connect with multi-path power divider, the reference clock module generates the clock signal with timestamp and unified benchmark, encoded device, oscillator modulates are at clock modulation signal, all WI-FI hot spots in scene are issued by multi-path power divider, multi-path power divider uses luminous-power distributor or electric power distributor, using needing electric light converter and photoelectric converter to carry out signal conversion when luminous-power distributor in signals transmission.Reference clock module uniformly issues clock signal in the present invention, more than precision nanosecond, so that the clock signal for reaching each WI-FI hot spot be made to be consistent in time, improves the accuracy of positioning.
Description
Technical field
The present invention relates to indoor positioning field, in particular to a kind of high accuracy positioning navigation system based on WI-FI hot spot.
Background technique
With the ever-increasing indoor environment of complexity environment, such as airport hall, exhibition room, warehouse, supermarket, library, ground
In the environment such as lower parking lot, mine, it is often necessary to determine the position of mobile terminal or other holders, facility and article indoors
Information.But limited by a variety of conditions such as positioning accuracy, positioning time and complex indoor environment, indoor positioning technologies are also at present
It is not applied well.
Currently, experts and scholars propose a variety of solutions applied to indoor positioning technologies, as A-GPS location technology,
Bluetooth technology, infrared technology, ultrasonic wave location technology, Radio Frequency Identification Technology, super-broadband tech, Wireless LAN, light with
Track location technology etc..
In addition, popularizing with WI-FI technology, WI-FI becomes ubiquitous now, as Wireless LAN series mark
A kind of location solution of the IEEE802.11 of standard, WI-FI location and navigation technology have many advantages, such as to be easily installed, are at low cost,
Gradually have been favored by people.
Current WI-FI location and navigation technology positioning accuracy is totally relatively low, and precision influences WI-FI within the scope of 1~20 meter
Positioning accuracy is concentrated mainly on the following aspects:
(1), it is positioned by each WI-FI hot spot in existing interior, each WI-FI hot spot identity information and position may
Frequently change, so that its exact position be made to be difficult to accurate determination；
(2), for each WI-FI hot spot due to the difference in alternate position spike and clock, the positioning signal time precision of broadcast can not
Guarantee, and the precision of WI-FI positioning is related to the precision of synchronised clock (distance that 1ns is equivalent to 30cm), therefore guarantees to synchronize
The precision of clock seems extremely important；
(3), due under indoor environment indoor arrangement, material structure, building scale difference lead to the path of signal
Loss is very big, and the immanent structure of building can cause the reflection, diffraction of signal, refraction, scattering, forms multipath transmi, makes
The amplitude, phase, arrival time that signal must be received change, or even cause the loss of signal, generate spurious signal, and it is fixed to increase
The difficulty of position.
Summary of the invention
In view of the problems of the existing technology, the present invention provides a kind of high accuracy positioning navigation system based on WI-FI hot spot
System.
To achieve the above object, concrete scheme of the invention is as follows:
A kind of high accuracy positioning navigation system based on WI-FI hot spot, comprising: reference clock module, encoder, oscillation
Device, multi-path power divider and several WI-FI hot spots, the reference clock module are connect with encoder, and the encoder, oscillator are equal
It is connect with multi-path power divider, clock signal of the reference clock module generation with timestamp and unified benchmark, encoded device,
Oscillator modulates issue all WI-FI hot spots in scene at clock modulation signal, by multi-path power divider.
Preferably, the WI-FI hot spot increases optical fiber interface and internal processing modules newly, and avoids legacy data processing system
System, the optical fiber interface demodulated after receiving clock modulation signal, is decoded and time bias, by clock signal and WI-FI heat
Clock encoded information, is then broadcasted by point identity information coding by WI-FI radio frequency processing.
Preferably, the optical fiber interface can also be multiple twin line interface.
Preferably, the multi-path power divider uses luminous-power distributor or electric power distributor, the luminous-power distributor
It is passive or solid state power distributor with electric power distributor, is needed in signals transmission using when luminous-power distributor
Electric light converter and photoelectric converter carry out signal conversion.
Preferably, WI-FI hot spot or calibration basic point can be added in the more complicated place of environment.
Preferably, by the electronic equipment of all sideband location informations, if pointing device or movement are with three-dimensional step counting function
The accurate location information of the equipment of energy is as calibration reference point.
Using technical solution of the present invention, have the advantages that
(1), the WI-FI hot spot identity information of unified layout is all fixed and invariable, location information Accurate Determining, to mention
The high accuracy of WI-FI hot spot positioning；
(2), reference clock module uniformly issues clock signal, more than precision nanosecond, to make to reach each WI-FI heat
The clock signal of point is consistent in time；
It (3), is not in electronics by passive or solid-state multi-path power divider by all WI-FI hot spot physical connection networkings
Component is non-linear or uncertain delay, makes one fixed value of Delay Guarantee of the clock signal sent every time, in each WI-
After the delay compensation of FI hot spot, the location information clock accuracy of whole WI-FI broadcast reaches nanosecond or more；
(4), WI-FI hot spot is added in the more complicated place of environment indoors or calibration basic point passes to reduce or eliminate signal
Defeated multipath effect bring location precision；
(5), by the electronic equipment of all sideband location informations, such as pointing device or movement with three-dimensional step function
The accurate location information of equipment is as calibration reference point, to improve the accuracy of positioning, reduces error.
Detailed description of the invention
Fig. 1 is functional block diagram of the present invention；
Fig. 2 is WI-FI hot spot process chart of the present invention.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further described.
Referring to figs. 1 to Fig. 2, the present invention provides a kind of high accuracy positioning navigation system based on WI-FI hot spot, comprising: base
Quasi- clock module 1, encoder 2, oscillator 3, multi-path power divider 4 and several WI-FI hot spots 5, the reference clock module 1 and volume
Code device 2 connects, and the encoder 2, oscillator 3 are connect with multi-path power divider 4, and the reference clock module 1 generates band sometimes
Between stab and the clock signal of unified benchmark, encoded device 2, oscillator 3 are modulated into clock modulation signal, are sent out by multi-path power divider 4
To WI-FI hot spots 5 all in scene.
The WI-FI hot spot 5 increases optical fiber interface and internal processing modules newly, and avoids legacy data processing system, described
Optical fiber interface carries out demodulation 7, decoding 8 and time bias 9 after receiving clock modulation signal 6, by clock signal and WI-FI hot spot body
Then part information 11 coding 10 is gone out clock encoded information by WI-FI radio frequency processing broadcast 12.
The optical fiber interface can also be multiple twin line interface.
The multi-path power divider 4 uses luminous-power distributor or electric power distributor, the luminous-power distributor and electric work
Rate distributor is passive or solid state power distributor, using needed in signals transmission when luminous-power distributor electric light turn
Parallel operation and photoelectric converter carry out signal conversion.
WI-FI hot spot 5 or calibration basic point can be added in the more complicated place of environment.
By the electronic equipment of all sideband location informations, such as pointing device or the equipment with three-dimensional step function of movement
Accurate location information as calibration reference point.
Working principle of the present invention:
(1), WI-FI hot spot 5 is unified in scene is laid with, and the identity information and location information of each WI-FI hot spot 5 can
Accurately to determine, location information can be accurate to Centimeter Level or even grade, and the unified WI-FI hot spot 5 being laid with can be used in user,
It is transmitted for data；
(2), reference clock module 1 generates the clock signal 6 with timestamp and unified benchmark, and clock accuracy, which will reach, to be received
More than second grade, encoded device 2, oscillator 3 are modulated into clock modulation signal, pass through optical fiber or twisted pair point by multi-path power divider 4
All WI-FI hot spots 5 in scene are issued, optical fiber interface or multiple twin line interface is increased newly in WI-FI hot spot 5 and internal module is avoided
Legacy data processing system, this optical fiber interface or multiple twin line interface are used to receive the clock signal of the transmission of reference clock module 1；
(3), 5 special optic fibre interface of WI-FI hot spot or twisted pair interface have the clock signal 6 of timestamp, pass through
Special inside processing module carries out the following processing: demodulation 7, decoding 8, time bias 9, by (the reference clock+time of clock signal 6
Delay compensation) and 5 identity information 11 of WI-FI hot spot coding, clock is then encoded into 10 information and is broadcasted by WI-FI radio frequency processing
12 go out, and the clock accuracy for each positioning signal being broadcasted can reach nanosecond or more；
(4), time bias: since 5 position of WI-FI hot spot each in scene is different, reference clock module 1 reaches each WI-FI
The transmission time of hot spot 5 is different, therefore after the laying of WI-FI hot spot 5, measurement is transferred to each WI-FI by reference clock module 1
The time delay t1, t2 ..., tn of hot spot 5, these time delays compensate inside WI-FI hot spot 5；
(5), WI-FI hot spot 5 or calibration basic point are added at the building place of blocking, i.e., it is fixed to improve by increasing location data
Position precision, due to calibration basic point position can with Accurate Determining, by GPS bench mark correction method, reduce or eliminate due to
Multipath Transmission bring position error, to improve positioning accuracy；
(6), receiver can such as be pinpointed when parsing WI-FI positioning signal by the electronic equipment of all sideband location informations
Equipment or the equipment with three-dimensional step function of movement, accurate location information can be used as calibration reference point.
In the present invention, location algorithm uses the prior art, and this will not be repeated here.
The above description is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all at this
Under the inventive concept of invention, using equivalent structure transformation made by description of the invention and accompanying drawing content, or directly/use indirectly
It is included in other related technical areas in scope of patent protection of the invention.
Claims (6)
1. a kind of high accuracy positioning navigation system based on WI-FI hot spot characterized by comprising reference clock module, coding
Device, oscillator, multi-path power divider and several WI-FI hot spots, the reference clock module are connect with encoder, the encoder,
Oscillator is connect with multi-path power divider, and the reference clock module generates the clock signal with timestamp and unified benchmark,
Encoded device, oscillator modulates issue all WI-FI hot spots in scene by multi-path power divider at clock modulation signal.
2. the high accuracy positioning navigation system according to claim 1 based on WI-FI hot spot, which is characterized in that the WI-
FI hot spot increases optical fiber interface and internal processing modules newly, and avoids legacy data processing system, and the optical fiber interface receives clock
Demodulated, decoded and time bias after modulated signal, clock signal and WI-FI hot spot identity information are encoded, then by when
Clock encoded information is broadcasted by WI-FI radio frequency processing.
3. the high accuracy positioning navigation system according to claim 2 based on WI-FI hot spot, which is characterized in that the light
Fine interface can also be multiple twin line interface.
4. the high accuracy positioning navigation system according to claim 1 based on WI-FI hot spot, which is characterized in that described more
Road power splitter uses luminous-power distributor or electric power distributor, and the luminous-power distributor and electric power distributor are passive
Or solid state power distributor, electric light converter and photoelectric converter are needed in signals transmission when using luminous-power distributor
Carry out signal conversion.
5. the high accuracy positioning navigation system according to claim 1 based on WI-FI hot spot, which is characterized in that in environment
More complicated place can add WI-FI hot spot or calibration basic point.
6. the high accuracy positioning navigation system according to claim 1 based on WI-FI hot spot, which is characterized in that by week
The electronic equipment of sideband location information, such as pointing device or the accurate location information of the equipment with three-dimensional step function of movement
As calibration reference point.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810897504.6A CN109029462A (en) | 2018-08-08 | 2018-08-08 | A kind of high accuracy positioning navigation system based on WI-FI hot spot |
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| CN201810897504.6A CN109029462A (en) | 2018-08-08 | 2018-08-08 | A kind of high accuracy positioning navigation system based on WI-FI hot spot |
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Citations (8)
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|---|---|---|---|---|
| CN102419180A (en) * | 2011-09-02 | 2012-04-18 | 无锡智感星际科技有限公司 | Indoor positioning method based on inertial navigation system and WIFI (wireless fidelity) |
| CN102638761A (en) * | 2012-04-24 | 2012-08-15 | 北京信息科技大学 | WIFI (Wireless Fidelity) positioning method and positioning system thereof |
| JP2013207650A (en) * | 2012-03-29 | 2013-10-07 | Jvc Kenwood Corp | Encoder and control method |
| CN104185274A (en) * | 2014-09-11 | 2014-12-03 | 周俊杰 | High-precision WLAN positioning scheme based on precision clock synchronization and time difference of arrival (TDOA) principle |
| CN105100225A (en) * | 2015-07-03 | 2015-11-25 | 常熟理工学院 | Indoor equipment location management method based on mobile terminal and WI-FI (Wireless Fidelity) |
| CN106455051A (en) * | 2016-09-23 | 2017-02-22 | 上海图聚智能科技股份有限公司 | WiFi positioning precision increasing method using distance calibration device |
| CN107071899A (en) * | 2017-04-27 | 2017-08-18 | 贵州大学 | Real-time positioning system in a kind of quick high accuracy room |
| CN108076445A (en) * | 2016-11-18 | 2018-05-25 | 法国国家太空研究中心 | Use the GNSS signal transmissions of cordless communication network |
-
2018
- 2018-08-08 CN CN201810897504.6A patent/CN109029462A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102419180A (en) * | 2011-09-02 | 2012-04-18 | 无锡智感星际科技有限公司 | Indoor positioning method based on inertial navigation system and WIFI (wireless fidelity) |
| JP2013207650A (en) * | 2012-03-29 | 2013-10-07 | Jvc Kenwood Corp | Encoder and control method |
| CN102638761A (en) * | 2012-04-24 | 2012-08-15 | 北京信息科技大学 | WIFI (Wireless Fidelity) positioning method and positioning system thereof |
| CN104185274A (en) * | 2014-09-11 | 2014-12-03 | 周俊杰 | High-precision WLAN positioning scheme based on precision clock synchronization and time difference of arrival (TDOA) principle |
| CN105100225A (en) * | 2015-07-03 | 2015-11-25 | 常熟理工学院 | Indoor equipment location management method based on mobile terminal and WI-FI (Wireless Fidelity) |
| CN106455051A (en) * | 2016-09-23 | 2017-02-22 | 上海图聚智能科技股份有限公司 | WiFi positioning precision increasing method using distance calibration device |
| CN108076445A (en) * | 2016-11-18 | 2018-05-25 | 法国国家太空研究中心 | Use the GNSS signal transmissions of cordless communication network |
| CN107071899A (en) * | 2017-04-27 | 2017-08-18 | 贵州大学 | Real-time positioning system in a kind of quick high accuracy room |
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