CN206369546U - A kind of hybrid location system based on smart mobile phone - Google Patents
A kind of hybrid location system based on smart mobile phone Download PDFInfo
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- CN206369546U CN206369546U CN201621460324.4U CN201621460324U CN206369546U CN 206369546 U CN206369546 U CN 206369546U CN 201621460324 U CN201621460324 U CN 201621460324U CN 206369546 U CN206369546 U CN 206369546U
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Abstract
The utility model is related to a kind of hybrid location system based on smart mobile phone, including beacon equipment and mobile phone terminal；Beacon equipment includes sound wave module and WIFI module；Mobile phone terminal includes beacon detection module and the locating module based on inertia；The beacon detection module includes WIFI receiving modules and the microphone to receive acoustic signals, and the module calculates mobile phone to the distance of beacon equipment by measuring acoustic signals with the time difference of radiofrequency signal arrival.The locating module based on inertia is connected with the beacon detection module, and the locating module based on inertia includes directions calculation module, distance calculation module；The directions calculation module includes compass and gyroscope, the moving direction to judge user；The distance calculation module includes acceleration transducer and gyroscope.The utility model is simple in construction, and the wireless location technology based on TDOA is combined with inertial positioning technology, effectively solves contradictory problems of the indoor locating system between precision and cost.
Description
Technical field
The utility model is related to wireless positioning field, particularly a kind of hybrid location system based on smart mobile phone.
Background technology
With the popularization of wireless network and intelligent terminal, location Based service is received more and more attention, and is being handed over
The fields such as logical guiding, point of interest inquiry, vehicle tracking, emergency relief, network social intercourse show huge vigor.Wherein, position
Technology is to realize the prerequisite and key of location Based service.Gps system is location technology most widely used at present, is had
The technical advantages such as precision height, wide coverage.But because satellite-signal can not penetrate barrier, it is impossible to suitable for the interior of closing
In environment.In order to solve the orientation problem of interior, various indoor positioning technologies, including wireless location are based on there has been proposed many
And inertial positioning.
Wireless location is some physical attributes according to wireless beacon propagation to determine the spatial relationship between node.It is based on
RSSI fingerprint location is current most common indoor wireless positioning method.RSSI fingerprint positioning methods are former based on scene analysis
Reason, it collects the RSSI signal characteristics of positioning scene using the distribution situation of change in signal strength in beaconing nodes coverage
（Location fingerprint）Fingerprint base is built, then the position of target is estimated by matching on-line measurement with fingerprint base.Based on RSSI's
Fingerprint positioning method adapts to the Multipath Transmission characteristic of indoor complexity, has the advantages that cost is low, easily realize without ranging.But
Deposit defect both ways：（1）The foundation and renewal of fingerprint map need to consume substantial amounts of cost of labor；（2）Error is larger（Typically
More than 2 meters）；And positioning result is very unstable.Ultra wide band is positioned（UWB）It is a kind of emerging wireless location technology.UWB is extremely wide
Bandwidth cause the time that measurement data bag is reached to can be as accurate as nanosecond, therefore with very high range accuracy, Asia can be provided
The positioning precision of meter level.In addition, UWB alignment systems also have, penetration power is strong, anti-multipath effect is good, system complexity is low excellent
Point.But UWB equipment price is costly, this also limits its application popularization significantly.
Inertial positioning/navigation is that the fortune of carrier in itself is measured using inertance elements such as accelerometer, gyroscope, compass
Dynamic parameter, speed and the position of carrier is obtained by integral operation, so as to reach the purpose of positioning.It can be independent of any
External information, in real time, continuous, the total movement parameter information that independently measures and carrier is provided（Position, speed, acceleration, appearance
State etc.）For navigating and controlling, while not producing the information of any exposed property to external world.But its shortcoming is to be provided
The error of moving parameter information can be over time growth and have the trend gradually increased.
In summary, existing indoor positioning technologies can't be fine in terms of precision, stability, cost and portability
The need for ground meets application, which also limits the popularization in location Based service indoors environment.
The content of the invention
In view of this, the purpose of this utility model is to provide a kind of hybrid location system based on smart mobile phone, structure letter
It is single, the wireless location technology based on TDOA is combined with inertial positioning technology, effectively solve indoor locating system precision with
Contradictory problems between cost.
The utility model is realized using following scheme：A kind of hybrid location system based on smart mobile phone, including beacon are set
Standby and mobile phone terminal；The beacon equipment includes sound wave module and WIFI transmitter modules；The mobile phone terminal includes beacon detection module
With the locating module based on inertia；The beacon detection module includes WIFI receiving modules and the wheat to receive acoustic signals
Gram wind, the module calculates mobile phone to the distance of beacon equipment by measuring the time difference that acoustic signals and radiofrequency signal are reached.Institute
State the locating module based on inertia with the beacon detection module to be connected, the locating module based on inertia includes direction calculating
Module, distance calculation module；The directions calculation module includes compass and gyroscope, the moving direction to judge user；Institute
Stating distance calculation module includes acceleration transducer and gyroscope.
Further, the sound wave module includes the external loudspeaker to launch sound wave.
Further, the WIFI transmitter modules include radiofrequency launcher.
Compared with prior art, it is of the present utility model simple in construction, by inertial positioning technology and the wireless skill based on TDOA
Art is combined, and adapts to the indoor environment of complexity.The precision and stability of indoor positioning, Er Qie great can not only be effectively improved
Big reduction lower deployment cost, obtains more preferable economic benefit.The technology can be widely applied in various large-scale indoor positioning scenes.
Brief description of the drawings
Fig. 1 is theory diagram of the present utility model.
Embodiment
Below in conjunction with the accompanying drawings and embodiment is described further to the utility model.
As shown in figure 1, present embodiments provide a kind of hybrid location system based on smart mobile phone, including beacon equipment with
Mobile phone terminal；The beacon equipment includes sound wave module and WIFI transmitter modules；The mobile phone terminal includes beacon detection module and base
In the locating module of inertia；The beacon detection module includes WIFI receiving modules and the Mike to receive acoustic signals
Wind, the module calculates mobile phone to the distance of beacon equipment by measuring the time difference that acoustic signals and radiofrequency signal are reached.It is described
Locating module based on inertia is connected with the beacon detection module, and the locating module based on inertia includes direction calculating mould
Block, distance calculation module；The directions calculation module includes compass and gyroscope, the moving direction to judge user；It is described
Distance calculation module includes acceleration transducer and gyroscope.
In the present embodiment, the sound wave module includes the external loudspeaker to launch sound wave.
In the present embodiment, the WIFI transmitter modules include radiofrequency launcher.
Preferably, in the present embodiment, when initial, beacon equipment is previously deployed to the open place in positioning scene,
So that each localization region can be covered by the signal of wireless beacon.The beacon equipment passes through sound wave module and wifi module
Periodically send acoustic signals and wireless beacon.Its transmission frequency should try one's best it is consistent with the walking frequency of people, i.e., according to people's
The speed of travel formulates corresponding scan frequency.The sound wave module produces sound wave, frequency of sound wave by an external loudspeaker
It may be configured as 18kHz-21kHz, the i.e. earshot higher than people.
In positioning stage, user realizes self poisoning by handheld mobile phone end.The mobile phone terminal receives sound by microphone
Ripple signal, and wireless beacon signal is searched for by wifi receiving modules, whether then judge the wireless beacon is line-of-sight propagation.Such as
Fruit is line-of-sight propagation, then enables and realize positioning using the localization method based on ranging, otherwise pass through the locating module based on inertia
Realize positioning.The beacon detection module calculates mobile phone to beacon equipment by measuring the reaching time-difference of radio frequency and acoustic signals
Distance, then using multilateration realize positioning.The locating module of the inertia is by directions calculation module and distance
Computing module, calculates the direction of motion and distance of user respectively, and then calculates the relative displacement of user, so as to realize positioning.
The directions calculation module is the moving direction that user is inferred by compass and gyroscope.The distance calculation module passes through meter
Module and step size computation module are walked, the mobile step number and step-length of user are calculated respectively, and calculates displacement according to this.The meter step
Module carrys out the mobile step number of counting user according to acceleration transducer.Pedometer module is only when the threshold value of gyro sensor exceedes
0.3 just starts to measure acceleration transducer data, to reduce positioning power consumption.
It is noted that the utility model protection is hardware configuration, do not required with computational methods as control method
Protection.It these are only in the utility model embodiment a preferably embodiment.But, the utility model is not limited to above-mentioned
Embodiment, all any equivalent changes done by the utility model scheme and modification, produced function is without departing from this
During the scope of scheme, protection domain of the present utility model is belonged to.
Claims (3)
1. a kind of hybrid location system based on smart mobile phone, it is characterised in that：Including beacon equipment and mobile phone terminal；The beacon
Equipment includes sound wave module and WIFI transmitter modules；The mobile phone terminal includes beacon detection module and the positioning mould based on inertia
Block；The beacon detection module includes WIFI receiving modules and the microphone to receive acoustic signals, and the module is by surveying
The time difference that amount acoustic signals are reached with radiofrequency signal calculates mobile phone to the distance of beacon equipment；The positioning based on inertia
Module is connected with the beacon detection module, and the locating module based on inertia includes directions calculation module, distance and calculates mould
Block；The directions calculation module includes compass and gyroscope, the moving direction to judge user；The distance calculation module bag
Include acceleration transducer and gyroscope.
2. a kind of hybrid location system based on smart mobile phone according to claim 1, it is characterised in that：The sound wave mould
Block includes the external loudspeaker to launch sound wave.
3. a kind of hybrid location system based on smart mobile phone according to claim 1, it is characterised in that：The WIFI hairs
Penetrating module includes radiofrequency launcher.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621460324.4U CN206369546U (en) | 2016-12-29 | 2016-12-29 | A kind of hybrid location system based on smart mobile phone |
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| CN201621460324.4U CN206369546U (en) | 2016-12-29 | 2016-12-29 | A kind of hybrid location system based on smart mobile phone |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108151747A (en) * | 2017-12-27 | 2018-06-12 | 浙江大学 | A kind of indoor locating system and localization method merged using acoustical signal with inertial navigation |
| CN113055889A (en) * | 2021-02-01 | 2021-06-29 | 浙江大学 | Mobile phone pasture detection and calibration method based on resonance characteristics of inertial measurement unit |
-
2016
- 2016-12-29 CN CN201621460324.4U patent/CN206369546U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108151747A (en) * | 2017-12-27 | 2018-06-12 | 浙江大学 | A kind of indoor locating system and localization method merged using acoustical signal with inertial navigation |
| CN108151747B (en) * | 2017-12-27 | 2021-05-04 | 浙江大学 | Indoor positioning system and positioning method using fusion of acoustic signals and inertial navigation |
| CN113055889A (en) * | 2021-02-01 | 2021-06-29 | 浙江大学 | Mobile phone pasture detection and calibration method based on resonance characteristics of inertial measurement unit |
| CN113055889B (en) * | 2021-02-01 | 2022-06-14 | 浙江大学 | Mobile phone pasture detection and calibration method based on resonance characteristics of inertial measurement unit |
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