CN106657419B - A kind of 3-D wireless signal measurement method in Internet of Things room - Google Patents
A kind of 3-D wireless signal measurement method in Internet of Things room Download PDFInfo
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- CN106657419B CN106657419B CN201710138962.7A CN201710138962A CN106657419B CN 106657419 B CN106657419 B CN 106657419B CN 201710138962 A CN201710138962 A CN 201710138962A CN 106657419 B CN106657419 B CN 106657419B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/06—Protocols specially adapted for file transfer, e.g. file transfer protocol [FTP]
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S11/00—Systems for determining distance or velocity not using reflection or reradiation
- G01S11/02—Systems for determining distance or velocity not using reflection or reradiation using radio waves
- G01S11/06—Systems for determining distance or velocity not using reflection or reradiation using radio waves using intensity measurements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
- G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/42—Determining position
- G01S19/45—Determining position by combining measurements of signals from the satellite radio beacon positioning system with a supplementary measurement
- G01S19/47—Determining position by combining measurements of signals from the satellite radio beacon positioning system with a supplementary measurement the supplementary measurement being an inertial measurement, e.g. tightly coupled inertial
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1095—Replication or mirroring of data, e.g. scheduling or transport for data synchronisation between network nodes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/18—Network planning tools
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
- Electric Clocks (AREA)
Abstract
The invention discloses a kind of 3-D wireless signal measurement methods in Internet of Things room, and initial time and coordinate, the time of the temperature compensation TCXO real time calibrations GPS of CPU are read using GPS；GPS is generated into initial coordinate and the relative coordinate of the inertial navigation unit generation of handheld device (Internet of Things) is calibrated, generates indoor absolute-coordinate three-dimensional；Radio receiving unit reads current demand signal RSSI (receiver signal strength instruction), and file storage unit stores coordinate；Store above-mentioned file and server sync, server by multiple Piece file mergences with merge after, and generate three-dimensional grid, gained signal strength data be subjected to linear three-dimensional interpolation, the complete signal strength in production one's respective area covers data.3-D wireless signal measurement method designs simple science in Internet of Things room provided by the invention, at low cost, measures simply, and can produce indoor three dimensional signal covering, convenient for assessment networking and jamming performance.
Description
Technical field
The present invention relates to Internet of Things wireless networking arts, the property of 3-D wireless signal covering in especially a kind of Internet of Things room
It can measurement method.
Background technology
Internet of Things develops rapidly, and needs wireless intensive networking, good networking signal covering (especially room in many fields
Interior networking covering) be system performance basic guarantee.The wireless signal covering of Internet of Things is a common base problem, is being covered
In the case of undesirable, it may appear that communication is interrupted or interrupts, and influences the normal operation of Internet of things system.
In wireless system portion net implementation process, Internet of Things wireless system often has group reticular density height, single node cost
Low rigors, and indoor radio propagation factor is numerous, propagation law is complicated, it is hardly possible indoors to use analytic method
It calculates, can not indiscriminately imitate the network planning and the network optimization grade height cost approach using 2/3/4G mobile communication system, such as
Signal covers software modeling and prediction, high cost instruments drive test etc..In sector application, there is an urgent need to a kind of portable high sexual valences
The wireless signal of ratio covers measuring system, quickly and efficiently to be measured the signal covering performance of wireless networking.
Note：NEO-8M is the module in dipper system；TCXO is compensation crystal oscillator；UTC time is Greenwich mean time
Between；RSSI is received signal strength.
Invention content
3-D wireless signal measurement method in the purpose of the present invention is to provide a kind of Internet of Things room based on handheld device.
In order to overcome the above-mentioned defect present invention in the prior art to adopt the following technical scheme that：
A kind of 3-D wireless signal measurement method in Internet of Things room, it is characterised in that：
A. GPS is utilized to read initial time and coordinate, the time of the temperature compensation TCXO real time calibrations GPS of CPU；
B., the relative coordinate that GPS is generated to the inertial navigation unit generation of initial coordinate and Internet of Things is calibrated, and is generated indoor
Absolute-coordinate three-dimensional；
C. radio receiving unit reads current demand signal RSSI, and file storage unit stores the three-dimensional in signal RSSI and B absolutely
To coordinate；
D. store above-mentioned file and server sync, server by multiple Piece file mergences with merge after, and generate three dimensional network
Gained signal strength data is carried out linear three-dimensional interpolation by lattice, is generated the complete signal strength in one's respective area and is covered data.
Further, GPS uses NEO-8M high-precision modules；Internet of Things in open ground or window side by capturing GPS letters
Number, obtain three-dimensional coordinate, UTC time and pulse per second (PPS).
Further, initial pulse per second (PPS) and UTC time are generated using GPS, then high-precision TCXO clocks is set into trip temperature
It is further compensate for, clock by relay is carried out in no GPS clock so that when system maintains high-precision unified within the testing time
Clock.
Further, it is set on TCXO there are one temperature sensors of high precision, measures the corresponding offset of its temperature change and miss
Difference, curve matching after carrying out averagely, the data after fitting are recorded in the flash of CPU, call data in the compensation, through surveying
Amount can maintain ms order of magnitude precision in 4 hours.
Preferably, under long-time measuring condition, need to calibrate indoor coordinate, the absolute-coordinate three-dimensional in B with
After laser ranging calibrating coordinates sing1e unit calibration measures, more accurate three-dimensional absolute coordinate is generated.
Preferably, line displacement coordinate ranging, system production after ranging are clicked through to known mark in A and B using laser ranging
Absolute coordinate after calibration, while being stored in spare in file system.
Further, the wireless signal strength receiving unit in C receives chip using the corresponding frequency band Internet of Things of frequency locking,
Current RSSI, which is read, according to 10Hz or higher frequencies merges into one five yuan in conjunction with current time spacetime coordinate (x, y, z, t)
Group, be written handheld device file system in store it is spare.
Further, after being measured for one group, all data are synchronized to server by WiFi units.
Further, N number of equipment is carried out at the same time measurement, and is synchronized to server, and server merges data, school
Accurate, fusion, server generate a three-dimensional grid, carry out linear interpolation to measuring three-dimensional data, obtain a full signal
Cover database.
Preferably, three dimensional signal measuring device in a kind of Internet of Things room, including handheld device and data fusion server,
It is characterized as：Handheld device includes central processor CPU, and Internet of Things receiver, the GPS being connect respectively with central processor CPU connect
Receive mechanism, laser range finder, WiFi lazy-tongs, reservoir, TCXO and temperature measurement, inertial navigation unit；Wherein Internet of Things receives
Machine, GPS receiver mechanism and WiFi lazy-tongs are designed with antenna；Antenna is synchronized by WiFi to connect with data fusion server.
3-D wireless signal measurement method designs simple science in Internet of Things room provided by the invention, is passed through by handheld device
Each space coordinate for crossing with when punctuate signal strength measurement, and can be completed in server end by multiple equipment parallel measurement
Data are synchronized and are merged, and carry out the three dimensional signal covering data that linear interpolation generates entire overlay area.It is at low cost, measure letter
It is single, and indoor three dimensional signal covering can be produced, convenient for assessment networking and jamming performance.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without having to pay creative labor, may be used also for those of ordinary skill in the art
With obtain other attached drawings according to these attached drawings：
Fig. 1 is 3-D wireless signal measurement embodiment of the method schematic diagram in a kind of Internet of Things room of the present invention；
Fig. 2 is the flow chart that markers is generated and maintained；
Fig. 3 is the schematic diagram that inertial navigation coordinate generates；
Fig. 4 is that flow diagram is calibrated in laser ranging；
Fig. 5 is that RSSI is received and recorded flow diagram；
Fig. 6 is operating diagram when multiple equipment measures；
Fig. 7 is 3-D wireless signal measurement apparatus schematic diagram in a kind of Internet of Things room.
Specific implementation mode
Below in conjunction with attached drawing and specific embodiment, the present invention will be described in detail, herein with the schematic implementation of the present invention
Example and explanation are used for explaining the present invention, but not as a limitation of the invention.
As shown in Figures 1 to 7, a kind of 3-D wireless signal measurement method in Internet of Things room, GPS unit use NEO-8M high
Precision module；By capturing GPS signal in open ground or window side, three-dimensional coordinate, UTC time and pulse per second (PPS) are obtained.CPU according to
Pulse per second (PPS), in conjunction with TCXO and temperature measurement circuit, after being calibrated to clock, CPU maintain error be 10us magnitudes it is accurate when
Clock provides locking instruction.Measurement can be got in, it, can be with trotting since the renewal rate of coordinate can arrive 10Hz or higher
Tachometric survey, one reduce time of measuring, and two reduce the accumulated error of inertial navigation unit.
By Internet of Things receiver real-time update RSSI, which can be used the reception of the general low cost of frequency range
Machine receives RSSI；The indoor coordinate (x, y, z) for generating each moment by inertial navigation unit simultaneously is generated in conjunction with markers
The three dimensional signal intensity samples values at each moment form five-tuple (x, y, z, t, RSSI).
CPU carries out real-time storage to each three dimensional signal intensity samples values, is recorded in SD card file.
Laser ranging unit is that (a unit ranging vertically downward, measures and leave ground three orthogonal distance measuring units
The height in face, other two unit are measured at a distance from wall), measure the grid deviation with a known coordinate point；It sets manually
The calibration absolute coordinate point of target one (x_c, y_c, z_c, t) when generating band is set, in synchronous recording to SD card.
After being measured for one group, all data are synchronized to server by WiFi.
N number of equipment can be carried out at the same time measurement, can be multiple zonule synchro measures by one big region segmentation；And it is synchronized to
Data are merged, calibrated, merged by server, server, and data server generates a three-dimensional grid, such as precision 0.1m
Spacing carries out linear interpolation to measuring three-dimensional data, high-order interpolation can also be selected to improve precision, a full signal is obtained and cover
Lid database.
Markers generates unit：The precision clock that one dynamic three dimensional signal data needs an overall situation unified, GPS clock
It cannot use, be initialized using GPS clock indoors, the method for then utilizing CPU to connect calibration maintains precision clock.GPS exists
UTC time and pulse per second (PPS) are obtained after open place positioning, relay timing is carried out with CPU using the initial time；CPU is used
The TCXO of 1ppm or so devises a temperature sensors of high precision on TCXO, measures the corresponding offset of its temperature change and misses
Difference, curve matching after carrying out averagely, the data after fitting are recorded in the flash of CPU, call data in the compensation, through surveying
Amount can maintain ms order of magnitude precision in 4 hours.Meet the requirement of more device data synchro measures, 10 signals of measurement per second are strong
Degree, each 100ms times, error very little.
Inertial navigation unit：This unit obtains three-dimensional coordinate according to high-precision GPS unit in open ground or edge of window：Longitude and latitude
Degree and height, longitude and latitude degree of being cellular, height unit is m, after being then aligned with inertial navigation chip, inertial navigation core
9 axis of piece：3-axis acceleration, three-axis gyroscope, three axle magnetometer, the output of inertial navigation chip are generated by calculating relative coordinate
The absolute coordinate at current time.
Laser ranging alignment unit：Indoors for a long time, surpass after an hour or when big region measures, inertial navigation unit meeting
Larger accumulated error is generated, the coordinate can be calibrated indoors；A selected indoor known coordinate point, for example some is marked on wall
Label are recorded in as calibration value joint markers in SD card by the relative coordinate deviation of laser ranging unit measurement and label.
Signal strength receives and recording unit：As described above, after system gets out spacetime coordinate (x, y, z, t), wirelessly
Receiver unit uses the general Internet of Things chip with frequency locking function, and in general, such chip has -100~-30dBm
RSSI automatic measurement ranges, in real time measure current time interested in frequency range RSSI value, merge spacetime coordinate form five-tuple
Then the data are stored in SD card file by (x, y, z, t, RSSI), even if with 100 speed measurements per second, SD card number
Dose rate is also no more than the writing speed of 50kbps.
Data synchronisation unit：It is after the measurement that multiple handheld devices complete certain area, data are same by wifi units
Data server is walked, server is tentatively merged first, merges redundant data by spacetime coordinate, data server generates equal
Even coordinate three-dimensional grid, the consecutive variations principle based on field strength；It carries out linear interpolation and obtains the signal covering number of all standing
According to.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.
Claims (9)
1. a kind of 3-D wireless signal measurement method in Internet of Things room, it is characterised in that：
A. GPS is utilized to read initial time and coordinate, the time of the temperature compensation TCXO real time calibrations GPS of CPU；
B., the relative coordinate that GPS is generated to the inertial navigation unit generation of initial coordinate and handheld device is calibrated, and is generated indoor
Absolute-coordinate three-dimensional；
C. radio receiving unit reads current demand signal RSSI, and file storage unit stores the three-dimensional in signal RSSI and step B absolutely
To coordinate；
D. store above-mentioned file and server sync, server by multiple Piece file mergences with merge after, and generate three-dimensional grid, will
Gained signal strength data carries out linear three-dimensional interpolation, generates the complete signal strength in one's respective area and covers data.
2. 3-D wireless signal measurement method in Internet of Things room according to claim 1, it is characterised in that：
GPS uses NEO-8M high-precision modules；Handheld device obtains three-dimensional by capturing GPS signal in open ground or window side
Coordinate, UTC time and pulse per second (PPS).
3. 3-D wireless signal measurement method in Internet of Things room according to claim 1, it is characterised in that：
Initial pulse per second (PPS) and UTC time are generated using GPS, then high-precision TCXO clocks are set and are further compensate for into trip temperature,
Clock by relay is carried out in the case of no GPS clock so that system maintains high-precision unified clock within the testing time.
4. 3-D wireless signal measurement method in Internet of Things room according to claim 3, it is characterised in that：
Temperature sensors of high precision there are one being set on TCXO, measures the corresponding offset error of its temperature change, after carrying out averagely
Data after fitting are recorded in the flash of CPU, call data in the compensation by curve matching, can be in 4 hours through measuring
Maintain ms order of magnitude precision.
5. 3-D wireless signal measurement method in Internet of Things room according to claim 1, it is characterised in that：
Under long-time measuring condition, need to calibrate indoor coordinate, the absolute-coordinate three-dimensional in step B and laser ranging
After calibrating coordinates sing1e unit calibration measures, more accurate three-dimensional absolute coordinate is generated.
6. 3-D wireless signal measurement method in Internet of Things room according to claim 5, it is characterised in that：
Line displacement coordinate ranging is clicked through to known mark in step A and step B using laser ranging, system production is calibrated after ranging
Absolute coordinate afterwards, while being stored in spare in file system.
7. 3-D wireless signal measurement method in Internet of Things room according to claim 1, it is characterised in that：
Radio receiving unit in step C receives chip, according to 10Hz or higher frequencies using the corresponding frequency band Internet of Things of frequency locking
Rate reads current RSSI, in conjunction with current time spacetime coordinate (x, y, z, t), merges into a five-tuple, write-in handheld device text
It is stored in part system spare.
8. 3-D wireless signal measurement method in Internet of Things room according to claim 1, it is characterised in that：
After being measured for one group, all data are synchronized to server by WiFi units.
9. 3-D wireless signal measurement method in Internet of Things room according to claim 1, it is characterised in that：
N number of equipment is carried out at the same time measurement, and is synchronized to server, and data are merged, calibrated, merged by server, server
A three-dimensional grid is generated, linear interpolation is carried out to measuring three-dimensional data, obtains a full signal covering database.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103369549A (en) * | 2013-06-19 | 2013-10-23 | 山东润谱通信工程有限公司 | Ray tracing transmission model-based indoor three dimensional space wireless signal predicting method |
| CN103702338A (en) * | 2013-12-24 | 2014-04-02 | 山东润谱通信工程有限公司 | Method for rapidly establishing indoor wireless signal fingerprint database |
| CN106200486A (en) * | 2016-08-17 | 2016-12-07 | 成都东创精英科技有限公司 | Wireless signal processing system based on Internet of things |
| CN107222876A (en) * | 2017-06-21 | 2017-09-29 | 深圳市盛路物联通讯技术有限公司 | A kind of Internet of Things wireless signal method of adjustment and system |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103369549A (en) * | 2013-06-19 | 2013-10-23 | 山东润谱通信工程有限公司 | Ray tracing transmission model-based indoor three dimensional space wireless signal predicting method |
| CN103702338A (en) * | 2013-12-24 | 2014-04-02 | 山东润谱通信工程有限公司 | Method for rapidly establishing indoor wireless signal fingerprint database |
| CN106200486A (en) * | 2016-08-17 | 2016-12-07 | 成都东创精英科技有限公司 | Wireless signal processing system based on Internet of things |
| CN107222876A (en) * | 2017-06-21 | 2017-09-29 | 深圳市盛路物联通讯技术有限公司 | A kind of Internet of Things wireless signal method of adjustment and system |
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