CN109788551A - A kind of three-dimensional indoor locating system and method - Google Patents
A kind of three-dimensional indoor locating system and method Download PDFInfo
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- CN109788551A CN109788551A CN201910140882.4A CN201910140882A CN109788551A CN 109788551 A CN109788551 A CN 109788551A CN 201910140882 A CN201910140882 A CN 201910140882A CN 109788551 A CN109788551 A CN 109788551A
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Abstract
The invention discloses a kind of three-dimensional indoor locating systems, it include: positioning terminal, first base station, the second base station, third base station, at least one is fixed on the positioning label in target to be positioned, first base station and positioning label respectively included barometer module for measure the first atmospheric pressure value and the second atmospheric pressure value, it is poor according to the first atmospheric pressure value and the second atmospheric pressure value computed altitude；First base station, the second base station, third base station and positioning label have respectively included UWB module, respectively the first distance between measurement first base station, the second base station, third base station and positioning label, second distance, third distance；Positioning terminal calculates the position coordinates for obtaining positioning label according to first distance, second distance, third distance and difference in height.The invention also discloses a kind of three-dimensional indoor orientation method for the positioning system, technical solution of the present invention can realize accurate three-dimensional indoor positioning under lower computation complexity expense.
Description
Technical field
The present invention relates to indoor positioning technologies field, in particular to a kind of three-dimensional indoor locating system and method.
Background technique
As Information and Communication Technology is maked rapid progress, people have reliable, stable location technology.Global positioning system
The appearance of (referred to as, GPS) technology, so that location technology leapfrogging growth, huge to change people's lives habit, user is only
GPS receiver need to be possessed i.e., the service can be used, present civilian GPS also can achieve ten meters or so of positioning accuracy.But it defends
Star signal can not send out positioning by serious influence indoors so as to cause GPS or Beidou.In order to which outdoor positioning technology is transported
Interior is used, there are many technologies for solving indoor positioning at present, such as: ultrasonic wave, infrared, bluetooth, WIFI, ZigBee and UWB
Indoor positioning mode.
Wherein, before UWB location technology is due to possessing higher application in location technology mode indoors the characteristics of its own
Scape.Firstly, UWB spectrum range is extremely wide, average emitted power is low；Secondly, UWB signal has high temporal resolution, have
Good ability of anti-multipath；UWB signal penetration power is strong, the indoor environment more suitable for barrier；The pulse width of UWB is very
It is narrow, nanosecond or subnanosecond grade can be reached, the theoretical precision of UWB positioning can achieve Centimeter Level even grade.
In existing three-dimensional indoor positioning technologies, the patent document of Publication No. CN207946517U proposes a kind of base
In the UWB 3 D positioning system of video auxiliary positioning.Disclosed in the document in technical solution, positioning subsystem includes at least four
A base station, camera are used to record the monitoring video information of corresponding region and are transmitted to central server, wherein at least three bases
Station is in same level and at least one base station is arranged other than the plane and close to ceiling region.The program uses video
Information auxiliary positioning improves positioning accuracy, but considerably increases algorithm complexity using video information auxiliary positioning, increases
The expense of communication, meanwhile, general housing story height is in three base stations and the 4th of same level in 3m (rice) left and right
Difference in height between a base station is not big enough, therefore the height error of the position coordinates of label to be positioned is big.
The patent document of Publication No. CN104902563A proposes a kind of more base networking UWB tri- for indoor positioning
Tie up positioning system and its localization method.Disclosed in the document in technical solution, positioning system includes tag system, base station, prison
Control terminal, the azimuth information that real-time locating module obtains four base stations to label carry out cross bearing processing, obtain accurate status
Confidence is ceased and is showed in the coordinate system of position.The position of label to be positioned can be calculated on the theoretical method that the patent proposes
Coordinate information is set, but orientation message intersects and may intersect at multiple points or not have crosspoint under practice situation.
In conclusion existing three-dimensional indoor positioning technologies have that computation complexity is high and height error is big.
Summary of the invention
In order to solve the above-mentioned problems in the prior art, the invention proposes a kind of three-dimensional indoor locating system and sides
Method realizes the technical solution of accurate three-dimensional indoor positioning to provide a kind of under lower computation complexity expense.
To achieve the goals above, the invention adopts the following technical scheme:
A kind of three-dimensional indoor locating system, comprising:
First base station, the second base station, third base station, positioning terminal and at least one positioning label；
The first base station includes the first UWB module, is used for and the positioning label, second base station, the third
Base station carries out UWB wireless communication；First barometer module, for obtaining the current gas pressure value of first base station；First communication module,
For being communicated with the positioning terminal；First main control chip, for measuring the positioning label to the first base station
First wireless signal flight time calculated the first distance of the first base station and the positioning label；According to first base
The current gas pressure value stood obtains the first atmospheric pressure value, according to first atmospheric pressure value and the second atmospheric pressure value obtain the first base station and
The difference in height of the positioning label；
Second base station includes the 2nd UWB module, for and the positioning label, the first base station progress UWB without
Line communication；Second main control chip, the second wireless singal flight time for measuring the positioning label to second base station,
The second distance for calculating second base station and the positioning label sends second distance to institute by the 2nd UWB module
State first base station；
The third base station includes the 3rd UWB module, for and the positioning label, the first base station progress UWB without
Line communication；Third main control chip, the third wireless signal flight time for measuring the positioning label to the third base station,
The third distance for calculating the third base station and the positioning label sends third distance by the 3rd UWB module and arrives institute
State first base station；
The positioning label is fixed in target to be positioned, comprising: the 4th UWB module, for and the first base station, the
Two base stations, third base station carry out UWB wireless communication；Second barometer module, for obtaining the current gas pressure value of positioning label；The
Four main control chips pass through the 4th UWB module for obtaining the second atmospheric pressure value according to the current gas pressure value of the positioning label
The second atmospheric pressure value is sent to the first base station；
The positioning terminal includes: second communication module, for being communicated with the first base station；Host, based on
Calculate the position coordinates of the positioning label.
Further, described to include: according to the current gas pressure value of the first base station the first atmospheric pressure value of acquisition
First main control chip carries out clipping sliding-window filtering to the current gas pressure value of the first base station, obtains institute
State the first atmospheric pressure value.
Further, described to include: according to current gas pressure value the second atmospheric pressure value of acquisition of the positioning label
4th main control chip carries out clipping sliding-window filtering to the current gas pressure value of the positioning label, obtains institute
State the second atmospheric pressure value.
Further, the first wireless signal flight time of the measurement positioning label to the first base station wraps
It includes, the first base station and the positioning label obtain the positioning label to described first by bilateral bidirectional ranging method
The first wireless signal flight time of base station；
The second wireless singal flight time of measurement positioning label to second base station includes described second
Base station and the positioning label pass through bilateral bidirectional ranging method, the second nothing of the acquisition positioning label to second base station
The line signal flight time；
The third wireless signal flight time of measurement positioning label to the third base station includes the third
Base station and the positioning label by bilateral bidirectional ranging method, acquisition is described position label to the third base station third without
The line signal flight time.
Further, the first base station and the first distance of the positioning label of calculating includes first master
Chip is controlled according to the first wireless signal flight time and electromagnetic transmission rate, calculates the first base station and the positioning
The current distance of label, first main control chip carry out clipping sliding-window filtering to the distance, obtain the first distance.
It is described to calculate second base station and the second distance for positioning label includes, second main control chip according to
The second wireless singal flight time and electromagnetic transmission rate calculate second base station with described and position the current of label
Distance, second main control chip carry out clipping sliding-window filtering to the distance, obtain the second distance；
It is described to calculate the third base station and the third distance for positioning label includes, the third main control chip according to
The third wireless signal flight time and electromagnetic transmission rate calculate the third base station with described and position the current of label
Distance, the third main control chip carry out clipping sliding-window filtering to the distance, obtain the third distance.
A kind of three-dimensional indoor orientation method, comprising:
First base station measures the current gas pressure value of first base station, obtains the first atmospheric pressure value according to the atmospheric pressure value；
The current gas pressure value for positioning label measurement and positioning label obtains the second atmospheric pressure value according to the atmospheric pressure value, described in transmission
Second atmospheric pressure value is to the first base station；
First base station according to the draught head of first atmospheric pressure value and second atmospheric pressure value obtain the first base station and
The difference in height of the positioning label；
First base station measures the positioning label to the first wireless signal flight time of the first base station；
First base station calculates the positioning label to the first distance of the first base station；
Second wireless singal flight time of the positioning label to second base station described in second base station measurement；
Second base station calculates the positioning label to the second distance of second base station；The second distance is sent to institute
State first base station；
Third wireless signal flight time of the positioning label to the third base station described in third base station measurement；
Third base station calculates the positioning label to the third distance of the third base station；The third distance is sent to institute
State first base station；
First base station send the positioning tag number of label, the first distance, the second distance, the third away from
From with the difference in height to positioning terminal；
The positioning terminal is according to the first distance, the second distance, the third distance and the difference in height meter
The position coordinates for calculating the positioning label, obtain the three dimensional local information of target to be positioned；
Wherein, the positioning label is fixed in the corresponding target to be positioned of the positioning label.
Further, the current gas pressure value of the first base station measurement first base station, obtains the first gas according to the atmospheric pressure value
Pressure value includes that the first base station measures the current gas pressure value of the first base station, carries out clipping sliding window to the atmospheric pressure value
Filtering obtains first atmospheric pressure value；
The current gas pressure value of the positioning label measurement and positioning label, obtaining the second atmospheric pressure value according to the atmospheric pressure value includes,
The positioning label measures the current gas pressure value of the positioning label, carries out clipping sliding-window filtering to the atmospheric pressure value, obtains
Second atmospheric pressure value.
Further, the first wireless signal that the first base station measures the positioning label to the first base station flies
Time includes that the first base station and the positioning label obtain the positioning label to institute by bilateral bidirectional ranging method
State the first wireless signal flight time of first base station；
Described in second base station measurement position label to second base station the second wireless singal flight time include,
Second base station and the positioning label obtain the positioning label to second base station by bilateral bidirectional ranging method
The second wireless singal flight time；
Described in the third base station measurement position label to the third base station the third wireless signal flight time include,
The third base station and the positioning label obtain the positioning label to the third base station by bilateral bidirectional ranging method
The third wireless signal flight time.
Further, the first distance that the first base station calculates positioning label to the first base station includes institute
The first main control chip is stated according to the first wireless signal flight time and electromagnetic transmission rate, calculate the first base station with
The current distance of the positioning label, first main control chip is to distance progress clipping sliding-window filtering, described in acquisition
First distance；
It includes second master control that second base station, which calculates second base station and the second distance of the positioning label,
Chip calculates second base station and the positioning is marked according to the second wireless singal flight time and electromagnetic transmission rate
The current distance of label, second main control chip carry out clipping sliding-window filtering to the distance, obtain the second distance；
It includes the third master control that the third base station, which calculates the third base station and the third distance of the positioning label,
Chip calculates the third base station and the positioning is marked according to the third wireless signal flight time and electromagnetic transmission rate
The current distance of label, the third main control chip carry out clipping sliding-window filtering to the distance, obtain the third distance.
Further, the method also includes calibrating the barometer module of the positioning label:
Positioning label setting is arrived and the first base station same level；
First base station measurement obtains I base station atmospheric pressure value PAi,
It positions label measurement and obtains J label atmospheric pressure value PTj；
It calculates first base station and positions the barometric error △ P of labelerror；
With the △ PerrorThe measurement data of the barometer module of the positioning label is modified；
Wherein, PAiAnd PTjIt respectively represents collected i-th of base station atmospheric pressure value of first base station and positioning label is collected
J-th of label atmospheric pressure value.
In technical solution of the present invention, pass through the first wireless signal flight time, second wireless singal flight time, third
The wireless signal flight time obtains target to be positioned to first base station, the distance of the second base station, third base station respectively；According to first
The difference of the atmospheric pressure value of the atmospheric pressure value of base station and positioning label obtains the difference in height of positioning label and first base station, positioning terminal according to
The height of first base station obtains the elevation information of target to be positioned, utilizes the elevation information of target to be positioned, first distance, second
Distance and third distance can calculate the three dimensional local information of target to be positioned；Compared with prior art, computation complexity is low,
The position of target to be positioned can be calculated using the elevation information of target to be positioned and two range informations；Positioning accuracy is high,
Using barometric surveying atmospheric pressure value computed altitude information, resolution ratio can reach 5 centimetres.
Detailed description of the invention
Fig. 1 is 1 system topology figure of specific embodiments of the present invention.
Fig. 2 is 1 first base station structural schematic diagram of specific embodiments of the present invention.
Fig. 3 is 1 second architecture of base station schematic diagram of specific embodiments of the present invention.
Fig. 4 is 1 third architecture of base station schematic diagram of specific embodiments of the present invention.
Fig. 5 is that the specific embodiment of the invention 1 positions label construction schematic diagram.
Fig. 6 is 2 method flow diagram of the specific embodiment of the invention.
Specific embodiment
Technical solution in order to better illustrate the present invention with reference to the accompanying drawing carries out a specific embodiment of the invention
Detailed description.
Specific embodiment 1
The present embodiment is a kind of preferred embodiment of the three-dimensional indoor locating system of the present invention.
Referring to Fig. 1, the positioning system topological structure of the present embodiment is as shown in Figure 1, comprising:
First base station, the second base station, third base station, positioning terminal and at least one positioning label；The positioning label is solid
It is scheduled in target to be positioned.
The positioning label, second base station, by UWB communicates nothing between the third base station at the first base station
Line connection；
The first base station is with the positioning terminal by wirelessly or non-wirelessly communicating to connect；
In the present embodiment, the connection type between the first base station and the positioning terminal can be finite element network,
Any one communication connection patterns such as WIFI, mobile communications network, the present invention are not limited in this respect；
The positioning terminal can be the application terminals such as computer, server, tablet computer, mobile phone, and the present invention does not have this
Limitation；
As shown in Fig. 2, the first base station in the present embodiment includes:
First UWB module, for carrying out UWB wireless communication with the positioning label, second base station；
First barometer module, for obtaining the current gas pressure value of first base station；
As a kind of preferred implementation scheme of the present embodiment, high-resolution digital air pressure is can be used in the barometer module
Sensor, to improve elevation carrection accuracy.
First communication module, for being communicated with the positioning terminal；
As a kind of preferred implementation scheme of the present embodiment, the first communication module is that WIFI can be used to communicate mould
Block.
First main control chip, when for measuring first wireless signal flight of the positioning label to the first base station
Between, calculate the first distance of the first base station and the positioning label；It is obtained according to the current gas pressure value of the first base station
First atmospheric pressure value obtains the height of the first base station and the positioning label according to first atmospheric pressure value and the second atmospheric pressure value
Difference:
Wherein, the PAFor the first atmospheric pressure value, the PTFor the second atmospheric pressure value, the Temp is current temperature value, Ke Yiyou
First barometer module or the measurement of the second barometer module obtain, and the △ H is difference in height；
As a kind of preferred implementation scheme of the present embodiment, first main control chip surveys the first barometer module
The current gas pressure value of the first base station of amount carries out clipping sliding-window filtering, obtains first atmospheric pressure value；
Wherein, the clipping sliding-window filtering method particularly includes:
The first in, first out air pressure storage unit that a length is M is provided in first main control chip, it is M times nearest for storing
The atmospheric pressure value of the first base station of measurement；
The current gas pressure value PA of the first main control chip first base stationNOWIt is stored with the first in, first out air pressure single
The atmospheric pressure value PA of the first base station for the last measurement being finally stored in memberM；
If | PANOW-PAM|≤THPA, then, the first main control chip is by the PANOWThe first in, first out air pressure is stored in deposit
Storage unit updates the first in, first out air pressure memory cell data；Otherwise the first main control chip directly abandons the PANOW；
First main control chip makees the average value of each atmospheric pressure value saved in the first in, first out air pressure storage unit
For first atmospheric pressure value:
Wherein, m is the number of the atmospheric pressure value stored in the first in, first out air pressure storage unit；PAmFirst enter elder generation to be described
The m atmospheric pressure value stored in air pressure storage unit out；M=1,2 ..., M.
The calculation of the first distance are as follows:
First main control chip obtains the first wireless signal flight time between the first base station and the positioning label
Tprop1；
In the present embodiment, the first wireless signal flight time can be using bilateral bidirectional ranging method, unilateral two-way
The measurement of the methods of distance measuring method；One directly can also be sent by positioning label send a message to the first base with sending time
It stands, first base station is using the difference of the sending time in receiving time and message as the first wireless signal flight time；The present invention couple
There is no limit for this；
As a kind of preferred implementation scheme of the present embodiment, the first wireless signal flight time uses bilateral two-way survey
It is measured away from method；
Wherein, the specific method of the bilateral bidirectional ranging method may is that
Label is positioned first in T1Moment sends polling message to the first base station, and first base station is in T2Reception arrives
Polling message, first base station send a response message to the positioning label at the T3 moment；Label is positioned in T4 reception to sound
Message is answered, label is positioned at the T5 moment and sends final message to the first base station；First base station is in T6 reception to finally
Message.After the first base station receives final message, according to the sending instant of above-mentioned each message and time of reception calculating
First wireless signal flight time:
According to the first wireless signal flight time and electromagnetic transmission rate c, first base station and the positioning are calculated
The first distance DIS of label1；
As a kind of implementation of the present embodiment, the DIS1The T can directly be passed throughprop1It calculates and obtains: DIS1
=Tprop1×c。
As a kind of preferred implementation scheme of the present embodiment, the first chip calculates the first base station and the positioning label
Current distance DISNOW, clipping sliding-window filtering is carried out to the distance, obtains the first distance；
DISNOW=Tprop1×c
It is provided with the first in, first out storage unit that a length is N in first main control chip, is obtained for storing nearest n times
First base station at a distance from the positioning label；
The judgement of first main control chip | DISNOW-DISN| whether it is not more than THDIS；
Wherein, the DISNThe last first base station and positioning obtained stored in the first in, first out storage unit
The distance of label；The THDISFor preset first distance clipping threshold value；
If it does, the first main control chip is by the DISNOWThe first in, first out is stored in apart from storage unit, updates the elder generation
Enter and first goes out apart from memory cell data；Otherwise the first main control chip directly abandons institute DISNOW；
The average value for each distance that first main control chip saves the first in, first out in storage unit as
The first distance:
Wherein, n is the number for the distance that the first in, first out stores in storage unit；DISnFor the first in, first out
The n distance stored in storage unit；N=1,2 ..., N.
As shown in figure 3, second base station in the present embodiment includes:
2nd UWB module, for carrying out UWB wireless communication with the positioning label, the first base station；
Second main control chip, when for measuring second wireless singal flight of the positioning label to second base station
Between, calculate the second distance of second base station and the positioning label, by the 2nd UWB module send described second away from
From information to the first base station；
Wherein, the calculation of the second distance are as follows:
Second main control chip obtains the second wireless singal flight time between second base station and the positioning label；
The specific measurement method of the second wireless singal flight time and the first wireless signal flight time measuring method
It is similar, it may refer to the specific measurement method of the first wireless signal flight time, details are not described herein；
Second chip calculates the second base station and institute according to the second wireless singal flight time and electromagnetic transmission rate
State the second distance of positioning label.The specific calculation of the second distance is similar to the calculation of first distance, can be with
Referring to the circular of first distance, details are not described herein.
As shown in figure 4, the third base station in the present embodiment includes:
3rd UWB module, for carrying out UWB wireless communication with the positioning label, the first base station；
Third main control chip, when for measuring third wireless signal flight of the positioning label to the third base station
Between, calculate the third distance of the third base station and the positioning label, by the 3rd UWB module send the third away from
From information to the first base station；
Wherein, the calculation of the third distance are as follows:
Third main control chip obtains the third wireless signal flight time between the third base station and the positioning label；
The specific measurement method of the third wireless signal flight time and the first wireless signal flight time measuring method
It is similar, it may refer to the specific measurement method of the first wireless signal flight time, details are not described herein；
Third chip calculates third base station and institute according to the third wireless signal flight time and electromagnetic transmission rate
State the third distance of positioning label.The specific calculation of the third distance is similar to the calculation of first distance, can be with
Referring to the circular of first distance, details are not described herein.
As shown in figure 5, the positioning label of the present embodiment includes:
4th UWB module, for carrying out UWB channel radio with the first base station, second base station, the third base station
Letter；
Second barometer module, for obtaining the current gas pressure value of positioning label；
4th main control chip, for obtaining the second atmospheric pressure value according to the current gas pressure value of the positioning label, by described
4th UWB module sends second atmospheric pressure value to the first base station；
As a kind of preferred implementation scheme of the present embodiment, the 4th main control chip surveys the second barometer module
The current gas pressure value of the positioning label of amount carries out clipping sliding-window filtering, obtains second atmospheric pressure value；Wherein, described
The specific method of clipping sliding-window filtering is similar to the clipping sliding-window filtering method of the first atmospheric pressure value, no longer superfluous herein
It states.
The positioning terminal includes second communication module, for being communicated with the first base station；Host, based on
The position coordinates for calculating the positioning label, obtain the three dimensional local information of target to be positioned.
In the present embodiment, the host by the second communication module receive from the first base station first away from
From, with a distance from second distance, third, difference in height, sat in conjunction with the position coordinates of the first base station, the position of second base station
It marks, the position coordinates of the third base station calculate the position coordinates for positioning label, the three-dimensional of the acquisition target to be positioned
Location information.:
Wherein, (x, y, z) is the x-axis positioned label in positioning coordinate system, the location information of y-axis, z-axis, (x1,y1,
z1) be x-axis of the first base station in positioning coordinate system, y-axis, z-axis location information, (x2,y2,z2) it is to exist with the second base station
The location information of x-axis, y-axis, z-axis in positioning coordinate system, (x3,y3,z3) be and third base station in positioning coordinate system
The location information of x-axis, y-axis, z-axis；r1For first distance, r2For second distance, r3For third distance；△ H is first base station and determines
The difference in height of position label.
Specific embodiment 2
The present embodiment is a kind of preferred embodiment of the three-dimensional indoor orientation method of the present invention.
The system of the present embodiment localization method application is positioning system described in specific embodiment 1, system structure ginseng
See specific embodiment 1.
Referring to Fig. 6, the localization method process of the present embodiment is as shown in Figure 2, comprising:
The current gas pressure value of S101, first base station measurement first base station, obtain the first atmospheric pressure value according to the atmospheric pressure value；
In this step, first base station can be directly using the current atmospheric pressure value as the first atmospheric pressure value；As the present embodiment
A kind of preferred implementation scheme, this step can further include:
S1011, first base station measurement obtain the current gas pressure value of first base station；
S1012, clipping sliding-window filtering is carried out to the atmospheric pressure value, obtains the first atmospheric pressure value；
The clipping sliding window of first atmospheric pressure value in the specific method and specific embodiment 1 of the clipping sliding-window filtering
Filter identical, details are not described herein.
S102, positioning label measure the current gas pressure value of its corresponding positioning label, obtain the second gas according to the atmospheric pressure value
Pressure value；
In this step, first base station can be directly using the current atmospheric pressure value as the second atmospheric pressure value；As the present embodiment
A kind of preferred implementation scheme, this step can further include:
S1021, positioning label measurement obtain the current gas pressure value of positioning label；
S1022, clipping sliding-window filtering is carried out to the atmospheric pressure value, obtains the second atmospheric pressure value；
The clipping sliding window of second atmospheric pressure value in the specific method and specific embodiment 1 of the clipping sliding-window filtering
Filter identical, details are not described herein.
S103, positioning label send second atmospheric pressure value to the first base station；
S104, first base station calculate the difference in height of the first base station and the positioning label；
Wherein, the PAFor the first atmospheric pressure value, the PTFor the second atmospheric pressure value, the Temp is current temperature value, Ke Yiyou
First barometer module or the measurement of the second barometer module obtain, and the △ H is difference in height；
S105, first base station calculate the positioning label to the first distance of the first base station；
S1051, first base station obtain first base station and position the first wireless signal flight time between label；
The specific acquisition methods of the first wireless signal flight time are identical as specific embodiment 1, and details are not described herein.
S1052, according to the first wireless signal flight time and electromagnetic transmission rate, calculate first base station and positioning
The first distance of label.
The circular of the first distance is identical as specific embodiment 1, and details are not described herein.
S106, the second base station calculate it is described positioning label arrive second base station second distance, transmission described second away from
From arrive the first base station；
S1061, the second base station obtain the second base station and position the second wireless singal flight time between label；
The specific acquisition methods of the second wireless singal flight time are identical as specific embodiment 1, and details are not described herein.
S1062, according to the second wireless singal flight time and electromagnetic transmission rate, obtain the second base station and positioning
The second distance of label.
The circular of the second distance is identical as specific embodiment 1, and details are not described herein.
S1063, the second base station send the second distance to the first base station；
S107, third base station calculate it is described positioning label to the third base station third distance, send the third away from
From arrive the first base station；
S1071, third base station obtain third base station and position the third wireless signal flight time between label；
The specific acquisition methods of the third wireless signal flight time are identical as specific embodiment 1, and details are not described herein.
S1072, according to the third wireless signal flight time and electromagnetic transmission rate, obtain third base station and positioning
The third distance of label.
The circular of the third distance is identical as specific embodiment 1, and details are not described herein.
S1073, third base station send the third distance and arrive the first base station；,
S108, first base station send the positioning tag number of the label, first distance, the second distance, described
Third distance and the difference in height are to positioning terminal；
S109, the positioning terminal are according to the first distance, the second distance, the third distance and the height
Difference calculates the position coordinates of the positioning label, obtains target three dimensional local information to be positioned；
Positioning terminal receives first distance, second distance, difference in height from the first base station, in conjunction with first base
It stands and the position coordinates of second base station calculates the position coordinates for positioning label:
Wherein, (x, y, z) is the x-axis positioned label in positioning coordinate system, the location information of y-axis, z-axis, (x1,y1,
z1) be x-axis of the first base station in positioning coordinate system, y-axis, z-axis location information, (x2,y2,z2) it is to exist with the second base station
The location information of x-axis, y-axis, z-axis in positioning coordinate system, (x3,y3,z3) be and third base station in positioning coordinate system
The location information of x-axis, y-axis, z-axis；r1For first distance, r2For second distance, r3For third distance；△ H is first base station and determines
The difference in height of position label.
As a kind of preferred implementation scheme of the present embodiment, the method for the present embodiment may be used also before the step S101
To include step S100, be calibrated to the barometer module of the positioning label；
In the present embodiment, the step S100 further comprises:
S1001, positioning label setting is arrived and the first base station same level；
S1002, first base station measurement obtain I base station atmospheric pressure value PAi,
S1003, positioning label measurement obtain J label atmospheric pressure value PTj；
S1004, it calculates first base station and positions the barometric error △ P of labelerror；
With the △ PerrorThe measurement data of the barometer module of the positioning label is modified: the second barometer mould
After block measures air pressure every time, the atmospheric pressure value that measurement obtains is added into △ PerrorCurrent gas pressure value as positioning label.The PAiWith
The PTjRespectively represent collected i-th of base station atmospheric pressure value of first base station and positioning collected j-th of label air pressure of label
Value.
In technical solution of the present invention, pass through the first wireless signal flight time, second wireless singal flight time, third
The wireless signal flight time obtains target to be positioned to first base station, the distance of the second base station, third base station respectively；According to first
The difference of the atmospheric pressure value of the atmospheric pressure value of base station and positioning label obtains the difference in height of positioning label and first base station, positioning terminal according to
The height of first base station obtains the elevation information of target to be positioned, utilizes the elevation information of target to be positioned, first distance, second
Distance and third distance can calculate the three dimensional local information of target to be positioned；Compared with prior art, computation complexity is low,
The position of target to be positioned can be calculated using the elevation information of target to be positioned and two range informations；Positioning accuracy is high,
Using barometric surveying atmospheric pressure value computed altitude information, resolution ratio can reach 5 centimetres.
In some preferred implementation schemes of the invention, the first atmospheric pressure value, the second atmospheric pressure value, first distance, the are being calculated
Two distance, third apart from when, can be eliminated by clipping sliding-window filtering and be adopted due to caused by the impulse disturbances accidentally occurred
Sample value deviation, further increases positioning accuracy；In other preferred implementation schemes of the invention, by two-way bilateral ranging,
Can to avoid positioning label and base station between need time synchronization the problem of, can also eliminate positioning label and base station between when
Between deviation；Improve the measurement accuracy of wireless signal flight time.
It should be noted that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with
Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this
In the scope of the claims of invention.
Claims (10)
1. a kind of three-dimensional indoor locating system, which is characterized in that the system comprises:
First base station, the second base station, third base station, positioning terminal and at least one positioning label；
The first base station includes the first UWB module, is used for and the positioning label, second base station, the third base station
Carry out UWB wireless communication；First barometer module, for obtaining the current gas pressure value of first base station；First communication module is used for
It is communicated with the positioning terminal；First main control chip, for measuring the positioning label to the first of the first base station
The wireless signal flight time calculates the first distance of the first base station and the positioning label；According to the first base station
Current gas pressure value obtains the first atmospheric pressure value, according to first atmospheric pressure value and the second atmospheric pressure value acquisition first base station with it is described
Position the difference in height of label；
Second base station includes the 2nd UWB module, for carrying out UWB channel radio with the positioning label, the first base station
Letter；Second main control chip, calculates the second wireless singal flight time for measuring the positioning label to second base station
The second distance of second base station and the positioning label sends second distance to described the by the 2nd UWB module
One base station；
The third base station includes the 3rd UWB module, for carrying out UWB channel radio with the positioning label, the first base station
Letter；Third main control chip, calculates the third wireless signal flight time for measuring the positioning label to the third base station
The third distance of the third base station and the positioning label sends third distance to described the by the 3rd UWB module
One base station；
The positioning label is fixed in target to be positioned, comprising: the 4th UWB module is used for and the first base station, the second base
It stands, third base station carries out UWB wireless communication；Second barometer module, for obtaining the current gas pressure value of positioning label；4th is main
Chip is controlled, for obtaining the second atmospheric pressure value according to the current gas pressure value of the positioning label, is sent by the 4th UWB module
Second atmospheric pressure value is to the first base station；
The positioning terminal includes: second communication module, for being communicated with the first base station；Host, for calculating
State the position coordinates of positioning label.
2. system according to claim 1, which is characterized in that described to be obtained according to the current gas pressure value of the first base station
First atmospheric pressure value includes:
First main control chip carries out clipping sliding-window filtering to the current gas pressure value of the first base station, obtains described the
One atmospheric pressure value.
3. system according to claim 1, which is characterized in that the current gas pressure value according to the positioning label obtains
Second atmospheric pressure value includes:
4th main control chip carries out clipping sliding-window filtering to the current gas pressure value of the positioning label, obtains described the
Two atmospheric pressure values.
4. system according to claim 1, it is characterised in that:
The first wireless signal flight time of measurement positioning label to the first base station includes the first base station
Pass through bilateral bidirectional ranging method, the first wireless communication of the acquisition positioning label to the first base station with the positioning label
Number flight time；
The second wireless singal flight time of measurement positioning label to second base station includes second base station
Pass through bilateral bidirectional ranging method, the second wireless communication of the acquisition positioning label to second base station with the positioning label
Number flight time；
The third wireless signal flight time of measurement positioning label to the third base station includes the third base station
Pass through bilateral bidirectional ranging method, the third wireless communication of the acquisition positioning label to the third base station with the positioning label
Number flight time.
5. system according to claim 4, it is characterised in that:
The first base station and the first distance of the positioning label of calculating includes that first main control chip is according to
First wireless signal flight time and electromagnetic transmission rate, calculate the first base station and it is described positioning label it is current away from
From first main control chip carries out clipping sliding-window filtering to the distance, obtains the first distance；
Second base station and the second distance of the positioning label of calculating includes that second main control chip is according to
Second wireless singal flight time and electromagnetic transmission rate, calculate second base station and the positioning label it is current away from
From second main control chip carries out clipping sliding-window filtering to the distance, obtains the second distance；
The third base station and the third distance of the positioning label of calculating includes that the third main control chip is according to
Third wireless signal flight time and electromagnetic transmission rate, calculate the third base station and it is described positioning label it is current away from
From the third main control chip carries out clipping sliding-window filtering to the distance, obtains the third distance.
6. a kind of three-dimensional indoor orientation method characterized by comprising
First base station measures the current gas pressure value of first base station, obtains the first atmospheric pressure value according to the atmospheric pressure value；
The current gas pressure value for positioning label measurement and positioning label obtains the second atmospheric pressure value according to the atmospheric pressure value, sends described second
Atmospheric pressure value is to the first base station；
First base station obtains the first base station and described according to the draught head of first atmospheric pressure value and second atmospheric pressure value
Position the difference in height of label；
First base station measures the positioning label to the first wireless signal flight time of the first base station；
First base station calculates the positioning label to the first distance of the first base station；
Second wireless singal flight time of the positioning label to second base station described in second base station measurement；
Second base station calculates the positioning label to the second distance of second base station；The second distance is sent to described
One base station；
Third wireless signal flight time of the positioning label to the third base station described in third base station measurement；
Third base station calculates the positioning label to the third distance of the third base station；Third distance is sent to described the
One base station；
First base station send the positioning tag number of label, the first distance, the second distance, the third distance and
The difference in height is to positioning terminal；
The positioning terminal calculates institute according to the first distance, the second distance, the third distance and the difference in height
The position coordinates for stating positioning label, obtain the three dimensional local information of target to be positioned；
Wherein, the positioning label is fixed in the corresponding target to be positioned of the positioning label.
7. according to the method described in claim 6, it is characterized by:
The current gas pressure value of the first base station measurement first base station, obtaining the first atmospheric pressure value according to the atmospheric pressure value includes, described
First base station measures the current gas pressure value of the first base station, clipping sliding-window filtering is carried out to the atmospheric pressure value, described in acquisition
First atmospheric pressure value；
The current gas pressure value of the positioning label measurement and positioning label, obtaining the second atmospheric pressure value according to the atmospheric pressure value includes, described
Positioning label measures the current gas pressure value of the positioning label, clipping sliding-window filtering is carried out to the atmospheric pressure value, described in acquisition
Second atmospheric pressure value.
8. according to the method described in claim 6, it is characterized by:
The first wireless signal flight time that the first base station measures positioning label to the first base station includes, described
By bilateral bidirectional ranging method, acquisition is described to position label to the of the first base station for first base station and the positioning label
One wireless signal flight time；
The second wireless singal flight time that label to second base station are positioned described in second base station measurement includes, described
By bilateral bidirectional ranging method, acquisition is described to position label to the of second base station for second base station and the positioning label
Two wireless signal flight time；
The third wireless signal flight time that label to the third base station are positioned described in the third base station measurement includes, described
By bilateral bidirectional ranging method, acquisition is described to position label to the of the third base station for third base station and the positioning label
Three wireless signal flight time.
9. according to the method described in claim 8, it is characterized by:
The first distance that the first base station calculates positioning label to the first base station includes first main control chip
According to the first wireless signal flight time and electromagnetic transmission rate, the first base station and the positioning label are calculated
Current distance, first main control chip carry out clipping sliding-window filtering to the distance, obtain the first distance；
It includes second main control chip that second base station, which calculates second base station and the second distance of the positioning label,
According to the second wireless singal flight time and electromagnetic transmission rate, second base station and the positioning label are calculated
Current distance, second main control chip carry out clipping sliding-window filtering to the distance, obtain the second distance；
It includes the third main control chip that the third base station, which calculates the third base station and the third distance of the positioning label,
According to the third wireless signal flight time and electromagnetic transmission rate, the third base station and the positioning label are calculated
Current distance, the third main control chip carry out clipping sliding-window filtering to the distance, obtain the third distance.
10. the method according to any one of claim 6~9, which is characterized in that the method also includes to described fixed
The barometer module of position label is calibrated:
Positioning label setting is arrived and the first base station same level；
First base station measurement obtains I base station atmospheric pressure value PAi,
It positions label measurement and obtains J label atmospheric pressure value PTj；
It calculates first base station and positions the barometric error Δ P of labelerror；
With the Δ PerrorThe measurement data of the barometer module of the positioning label is modified；
Wherein, PAiAnd PTjRespectively represent collected i-th of base station atmospheric pressure value of first base station and collected j-th of label of positioning
Label atmospheric pressure value.
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