CN107959925A - A kind of smart home device assisted location method - Google Patents
A kind of smart home device assisted location method Download PDFInfo
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- CN107959925A CN107959925A CN201711192402.6A CN201711192402A CN107959925A CN 107959925 A CN107959925 A CN 107959925A CN 201711192402 A CN201711192402 A CN 201711192402A CN 107959925 A CN107959925 A CN 107959925A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/2803—Home automation networks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention belongs to smart home field, discloses a kind of smart home device assisted location method, the positioning signal strength data sending sent of the indoor all households acquired to the location service elements；Calculate household position and client terminal is served data to by network service interface；Client terminal is connected by built Bluetooth module and provides position information data to client terminal；Bluetooth sensing unit filters out household bluetooth data packets, obtains household bluetooth signal intensity by the household around built-in low-power consumption bluetooth detection module scanning.The present invention is by using dimensional Modeling Technology, generate whole indoor furniture location drawing picture, the facility information of the furniture is marked in editor module, realize the unified combination of positional information and facility information, information after reunification is finally transferred to remote control module, intelligent management and control is realized, greatly improves the degree of automation.
Description
Technical field
The invention belongs to smart home field, more particularly to a kind of smart home device assisted location method.
Background technology
At present, the associated flow in smart home device mark position on picture includes step：1st, user uses cell phone application
The outdoor scene photo of a domestic environment is shot, which includes one or more smart home devices；2nd, user is on photo
Long-press on the position of smart home device, display device list；3rd, corresponding smart home is selected to set in the list of user's slave device
It is standby；4th, the position association of the smart home device is completed, generates corresponding mark and on the position Overlapping display.But use
When above-mentioned technical proposal associates smart home device position, user need to be clear from the specific location of smart home device in advance,
In addition, association process largely relies on manual operation, user's learning cost is high, and operation is slightly cumbersome.
In information, science and technology is all flourishing, epoch for developing rapidly, by technological applications in life, also allows life more and more just
Profit.Such as current institute can be positioned by global positioning system (Global Positioning System, GPS) outdoors
On ground, then corresponding service is provided, such as finding nearby information, navigation, vehicle management etc., and global positioning system is to pass through
Satellite combination principle of triangulation in space is positioned, so need to keep in communication and could be positioned with satellite, its essence
Accuracy is at a relatively high, but can not have the indoor environment of veil is interior to use on the top.Therefore there is dealer using other technologies in room
Interior home equipment positioning, such as infrared ray, ultrasonic, wireless network etc., but the positional accuracy of these technologies also needs to improve.
In conclusion problem existing in the prior art is：Furniture position positioning, association process largely rely on manual operation,
User's learning cost is high, cumbersome；The positional accuracy of the prior art needs to improve.
The content of the invention
In view of the problems of the existing technology, the present invention provides a kind of smart home device assisted location method.
The present invention is achieved in that a kind of smart home device assisted location method, the smart home device auxiliary
Localization method includes：
Bluetooth sensing unit is sent out the positioning signal strength data sent of the indoor all households acquired by network
It is sent to the location service elements；
Location service elements calculate household position and serve data to client terminal by network service interface；
The location service elements periodically send exploration carrier signal by built-in read module first, calculate every
The return signal intensity RSS and ambient signal strength RSSe of a detective period；
Secondly RSS is modified with RSSe, obtains the responder module built in the bluetooth module of detective period household and return
Valid signal strengths RSSr, calculate multiple detective periods valid signal strengths average RSSa as transponder return believe
Number intensity；
Obtained RSSa after finally being stablized according to the read module, by table look-up or be calculated the responder module with
The distance between read module, realizes the accurate positionin of responder module；
It is a bit of carrier signal that read module is periodically launched that responder module, which explores signal, Mei Ge little
The carrier cycle issue of section be N, between each segment can be definite by experiment at intervals of T, T and N：The value of N ensures response mould
Block antenna induction is to enough energy；The value of T will ensure the return signal of the previous detective period of responder module without interference with this
The calculating of periodic signal strength signal, i.e., the energy complete attenuation that a cycle receives on responder module；
Read module measuring environment signal strength RSSe first；Then the detection carrier signal in N number of cycle is launched,
Return signal intensity RSS is measured followed by, and measuring method is identical twice, and forms a detective period, is obtained according to RSSe and RSS
To the valid signal strengths RSSr of the detective period；
With the signal strength RSS obtained after emission detection carrier wave, have ready conditions and subtract ambient signal strength RSSe, such as formula：
The average value of the RSSr of M detective period is taken to form a signal strength update cycle, such as formula as RSSa：
All households connect client terminal by built Bluetooth module and provide position information data to client terminal；
Bluetooth sensing unit filters out household bluetooth by the household around built-in low-power consumption bluetooth detection module scanning
Data packet, obtains household bluetooth signal intensity；
The method that bluetooth sensing unit obtains the positioning signal strength data of indoor all households includes：
First assume that unknown node is randomly dispersed in a square region, and coordinate is established using square region central point as origin
System, draws helix using fixed intervals R and is divided into n sections as the mobile route of anchor node, a length of L in region, helix, mobile anchor section
Point equips bidirectional oriented antenna movement, is moved by fixed angular speed ω, and directional aerial central shaft is vertical with moving direction all the time,
Mobile route is fixed multi-layer helical line, and moving process is from inside to outside, to start timing movement on the left of coordinate origin at coordinate,
By 00:00 starts, periodic broadcast data packet, continues this process until anchor node is moved to right side (Rn/2,0) coordinate points
When terminate；
With the movement of anchor node, node to be positioned receives the data packet of anchor node broadcast by concentrating, and is connect when for the first time
When receiving data packet, value is labeled as T at the time of when will receive data packet for the first time1(1), and detect for the first time receive data
Signal strength values during bag, are denoted as RSSI1 (1)；When receiving data packet for the second time, when will receive data packet for the second time
Moment value is labeled as T2 (1), and signal strength values when receiving data packet for the second time are detected, it is denoted as RSSI2 (1)；Repeat above mistake
Journey, untill no longer detecting data packet；Finally detected moment value is Tn (1), signal strength values RSSIn (1)；
Unknown node is according to T1 (1), Tn (1)And angular velocity omega calculates residing arc section and angle at present, obtains virtual anchor node
The angle of intermediate pointAndWhen unknown node is distributed on the outside of helix, a wheel data packet is received only, and is worked as
When unknown node is distributed on the inside of helix, concentration receives two-wheeled data packet, respectively positioned at the equal angular side of different segmental arcs
To value and signal strength are respectively labeled as at the time of the second wheel receivesWith
Second wheel calculating process is identical with the first round, obtains intermediate point angleAndValue；
If each unknown node only detects a wheel data, the position of the outer lateral extent d1 of the unknown node circular arc is positioned at
Put, d1 is drawn by signal fadeout model conversation, then determines the unknown node coordinate according to angle value；If detect two-wheeled number
According to, then the unknown node coordinate being determined according to the less round information of RSSI value, RSSI is smaller, and respective distances are bigger, and then
Data received by node to be positioned are more；
The value of fixed intervals R is set according to directional antenna communications distance, is on the left of the coordinate origin：(-R/2,0)；Anchor
Coordinate points are on the right side of node：(Rn/2,0) coordinate points；
It will obtain household bluetooth signal intensity and the location service elements are sent to by mixed-media network modules mixed-media；
The UUID of household and the data pair of signal strength that location service elements send each bluetooth sensing unit, according to
UUID carries out data update as major key；When needing to carry out location Calculation to the household of some UUID, take out the UUID and correspond to respectively
The newest signal strength data sent of bluetooth sensing unit, carries out location Calculation；
Further, the location service elements are communicated by mixed-media network modules mixed-media and picture recognition module；Described image is known
Other module is by mixed-media network modules mixed-media and connection figure as editor module communication；Described image editor module is connected long-range by mixed-media network modules mixed-media
Control module；
Described image identification module is provided with digital analog converter.
Further, the image scaled of the 3-D scanning module generation is 1：1；
Described image editor module is provided with 3 d modeling software and wireless launcher；
The remote control module is provided with wireless receiving and emitter.
Further, the read module by FPGA module, radiating circuit module, receiving circuit module, amplification filter module,
AD conversion module；Radiating circuit module and receive circuit module and be connected with antenna：
FPGA module, for input and output control, task scheduling, signal modulation, a/d converter control, digital filtering, ripple
Shape identifies and RSS is calculated；
Radiating circuit module, is connected with FPGA module, for modulated signal to be carried out power amplification, is sent out by antenna
It is shot out；
Receiving circuit module, is connected with radiating circuit module, is connected with antenna, and letter is returned for receiving transponder from antenna
Number；
Amplify filter module, be connected with receiving circuit module, the return signal received belongs to small-signal, to the signal
Sampling can be just digitized after being filtered amplification；
AD conversion module, is connected with amplification filter module, for periodic sampling to be fixed to amplifying filtered signal；
The FPGA module further comprises：
Input and output controller, for carrying out encoding and decoding to input through keyboard, generates user command；
Signal modulation module, for carrier signal generation and will need the order for being sent to transponder be modulated at carrier wave letter
On number；
Digital filtering module, the digital signal for being obtained to sampling carry out bandwidth filtering, remove interference；
Waveform recognition module, for calculating local maximum to filtered digital signal, identifies the ripple of a cycle
Shape；
RSS is calculated and decoder module, for calculating received signal strength from Wave data, according to transponder return signal
Coding rule, signal is decoded, extraction responder module return data.
Advantages of the present invention and good effect are：The smart home device assisted location method is by using three-dimensional modeling skill
Art, generates the household location drawing picture inside whole house, and the facility information of the household is marked in editor module, realizes that position is believed
The unified combination of breath and facility information, is finally transferred to remote control module by information after reunification, realizes intelligent management and control, makes certainly
Dynamicization degree greatly improves, and the associated speed in smart home device position, simple and convenient when accelerating operation first.
Bluetooth sensing unit of the present invention is by network by the positioning signal strength sent of the indoor all households acquired
Data sending is to the location service elements；Location service elements calculate household position and by network service interface by data
It is supplied to client terminal；All households connect client terminal and provide position to client terminal by built Bluetooth module to be believed
Cease data；Bluetooth sensing unit filters out household bluetooth by the household around built-in low-power consumption bluetooth detection module scanning
Data packet, obtains household bluetooth signal intensity；And then obtain high precision position information.
The present invention localization method need not perform responder module ID read operations, you can judge be in read module electromagnetic field
It is no to have responder module；
Accurate relative positioning can be carried out to the responder module in shelter.The variation tendency of foundation return signal intensity,
Mobile reading module, finds the maximum of signal strength, then can be worth to according to the maximum between read module and responder module
Distance, so as to accurately to responder module carry out relative positioning；
Responder module ID read operations are triggered using result of detection, reduce read module operating power consumption.
The read module of the present invention calculates received signal strength RSSe, RSSe as the interference signal of current environment first
Intensity；Then, one section of shorter carrier signal (usual few tens of cycles) is sent, then detects return signal intensity RSS, is used
RSS removals RSSe obtains signal strength RSSr, RSSr and is known as valid signal strengths.The above process is periodically carried out, and is calculated
Return signal intensity of the average (RSSa) of the valid signal strengths in multiple cycles as responder module.Answered when read module is close
When answering module, signal strength RSSa is big, and when read module is away from responder module, received signal strength RSSa is small, so as to
Determine the orientation of responder module, and according to the received signal strength RSSa in particular orientation, estimate responder module and read module
The distance between, responder module is accurately positioned.
The present invention uses core of the time value parameter as localization method, avoids the error that GPS information is brought, together
Shi Liyong directional aerial high gains, the remote feature of communication distance, is disposed applied to actual environment, and comprehensive positioning accuracy is higher, fits
Close indoor WSN positioning；
The present invention has higher positioning accuracy, and this method advantage has：
Time is a kind of one of highest environmental parameter of relative accuracy, and the present invention replaces passing using time parameter computational methods
The method for determining position in system localization method using GPS, the error brought by environmental variance is reduced from the source of localization method,
With inborn superiority；
Application value of the present invention is higher；The present invention can strengthen signal strength, increase antijamming capability, suitable for actual interior
The deployment of environment.
Brief description of the drawings
Fig. 1 is the flow chart of smart home device assisted location method provided in an embodiment of the present invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that specific embodiment described herein is not used to limit only to explain the present invention
The fixed present invention.
The structure of the present invention is explained in detail below in conjunction with the accompanying drawings.
As shown in Figure 1, smart home device assisted location method provided in an embodiment of the present invention includes：
S101：Bluetooth sensing unit is by network by the positioning signal strength number sent of the indoor all households acquired
According to being sent to the location service elements；
S102：Location service elements calculate household position and serve data to client's end by network service interface
End；
S103：All households connect client terminal by built Bluetooth module and provide position information to client terminal
Data；
S104：Bluetooth sensing unit is become a Buddhist monk or nun by the household around built-in low-power consumption bluetooth detection module scanning, filtering
Bluetooth data packets are occupied, obtain household bluetooth signal intensity；
S105：It will obtain household bluetooth signal intensity and the location service elements are sent to by mixed-media network modules mixed-media；
S106：The UUID of household and the data pair of signal strength that location service elements send each bluetooth sensing unit,
According to UUID data update is carried out as major key；When needing to carry out location Calculation to the household of some UUID, this UUID pairs is taken out
The newest signal strength data sent of each bluetooth sensing unit is answered, carries out location Calculation.
The location service elements are communicated by mixed-media network modules mixed-media and picture recognition module；Described image identification module leads to
Mixed-media network modules mixed-media is crossed with connection figure as editor module communicates；Described image editor module connects remote control mould by mixed-media network modules mixed-media
Block；
Described image identification module is provided with digital analog converter.
The image scaled of the 3-D scanning module generation is 1：1；
Described image editor module is provided with 3 d modeling software and wireless launcher；
The remote control module is provided with wireless receiving and emitter.
The location service elements periodically send exploration carrier signal by built-in read module first, calculate every
The return signal intensity RSS and ambient signal strength RSSe of a detective period；
Secondly RSS is modified with RSSe, obtains the responder module built in the bluetooth module of detective period household and return
Valid signal strengths RSSr, calculate multiple detective periods valid signal strengths average RSSa as transponder return believe
Number intensity；
Obtained RSSa after finally being stablized according to the read module, by table look-up or be calculated the responder module with
The distance between read module, realizes the accurate positionin of responder module；
It is a bit of carrier signal that read module is periodically launched that responder module, which explores signal, Mei Ge little
The carrier cycle issue of section be N, between each segment can be definite by experiment at intervals of T, T and N：The value of N ensures response mould
Block antenna induction is to enough energy；The value of T will ensure the return signal of the previous detective period of responder module without interference with this
The calculating of periodic signal strength signal, i.e., the energy complete attenuation that a cycle receives on responder module；
Read module measuring environment signal strength RSSe first；Then the detection carrier signal in N number of cycle is launched,
Return signal intensity RSS is measured followed by, and measuring method is identical twice, and forms a detective period, is obtained according to RSSe and RSS
To the valid signal strengths RSSr of the detective period；
With the signal strength RSS obtained after emission detection carrier wave, have ready conditions and subtract ambient signal strength RSSe, such as formula：
The average value of the RSSr of M detective period is taken to form a signal strength update cycle, such as formula as RSSa：
The read module is by FPGA module, radiating circuit module, receiving circuit module, amplification filter module, AD conversion
Module；Radiating circuit module and receive circuit module and be connected with antenna：
FPGA module, for input and output control, task scheduling, signal modulation, a/d converter control, digital filtering, ripple
Shape identifies and RSS is calculated；
Radiating circuit module, is connected with FPGA module, for modulated signal to be carried out power amplification, is sent out by antenna
It is shot out；
Receiving circuit module, is connected with radiating circuit module, is connected with antenna, and letter is returned for receiving transponder from antenna
Number；
Amplify filter module, be connected with receiving circuit module, the return signal received belongs to small-signal, to the signal
Sampling can be just digitized after being filtered amplification；
AD conversion module, is connected with amplification filter module, for periodic sampling to be fixed to amplifying filtered signal；
The FPGA module further comprises：
Input and output controller, for carrying out encoding and decoding to input through keyboard, generates user command；
Signal modulation module, for carrier signal generation and will need the order for being sent to transponder be modulated at carrier wave letter
On number；
Digital filtering module, the digital signal for being obtained to sampling carry out bandwidth filtering, remove interference；
Waveform recognition module, for calculating local maximum to filtered digital signal, identifies the ripple of a cycle
Shape；
RSS is calculated and decoder module, for calculating received signal strength from Wave data, according to transponder return signal
Coding rule, signal is decoded, extraction responder module return data.
The method that bluetooth sensing unit obtains the positioning signal strength data of indoor all households includes：
First assume that unknown node is randomly dispersed in a square region, and coordinate is established using square region central point as origin
System, draws helix using fixed intervals R and is divided into n sections as the mobile route of anchor node, a length of L in region, helix, mobile anchor section
Point equips bidirectional oriented antenna movement, is moved by fixed angular speed ω, and directional aerial central shaft is vertical with moving direction all the time,
Mobile route is fixed multi-layer helical line, and moving process is from inside to outside, to start timing movement on the left of coordinate origin at coordinate,
By 00:00 starts, periodic broadcast data packet, continues this process until anchor node is moved to right side (Rn/2,0) coordinate points
When terminate；
With the movement of anchor node, node to be positioned receives the data packet of anchor node broadcast by concentrating, and is connect when for the first time
When receiving data packet, value is labeled as T at the time of when will receive data packet for the first time1 (1), and detect and receive data for the first time
Signal strength values during bag, are denoted as RSSI1 (1)；When receiving data packet for the second time, when will receive data packet for the second time
Moment value is labeled as T2 (1), and signal strength values when receiving data packet for the second time are detected, it is denoted as RSSI2 (1)；Repeat above mistake
Journey, untill no longer detecting data packet；Finally detected moment value is Tn (1), signal strength values RSSIn (1)；
Unknown node is according to T1 (1), Tn (1)And angular velocity omega calculates residing arc section and angle at present, obtains virtual anchor node
The angle of intermediate pointAndWhen unknown node is distributed on the outside of helix, a wheel data packet is received only, and is worked as
When unknown node is distributed on the inside of helix, concentration receives two-wheeled data packet, respectively positioned at the equal angular side of different segmental arcs
To value and signal strength are respectively labeled as at the time of the second wheel receivesWith
Second wheel calculating process is identical with the first round, obtains intermediate point angleAndValue；
If each unknown node only detects a wheel data, the position of the outer lateral extent d1 of the unknown node circular arc is positioned at
Put, d1 is drawn by signal fadeout model conversation, then determines the unknown node coordinate according to angle value；If detect two-wheeled number
According to, then the unknown node coordinate being determined according to the less round information of RSSI value, RSSI is smaller, and respective distances are bigger, and then
Data received by node to be positioned are more；
The value of fixed intervals R is set according to directional antenna communications distance, is on the left of the coordinate origin：(-R/2,0)；Anchor
Coordinate points are on the right side of node：(Rn/2,0) coordinate points.
The present invention utilizes dimensional Modeling Technology, and the furniture appliance position inside whole house is generated by 3-D scanning module 1
Put image and picture recognition module 2 is transferred in a manner of digital signal, digital signal is changed into simulation by picture recognition module 2
Signal, and by image transmitting to picture editting's module 3, by marking the facility information of the furniture appliance in editor module 3,
Realize the unified combination of positional information and facility information, information after reunification is finally transferred to remote control module 4, realizes intelligence
Can management and control.
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
All any modification, equivalent and improvement made within refreshing and principle etc., should all be included in the protection scope of the present invention.
Claims (5)
- A kind of 1. smart home device assisted location method, it is characterised in that the smart home device assisted location method bag Include：Bluetooth sensing unit is arrived the positioning signal strength data sending sent of the indoor all households acquired by network The location service elements；The method that bluetooth sensing unit obtains the positioning signal strength data of indoor all households includes：First assume that unknown node is randomly dispersed in a square region, and coordinate system is established using square region central point as origin, with Fixed intervals R draws mobile route of the helix as anchor node, a length of L in region, and helix is divided into n sections, mobile anchor node dress Standby bidirectional oriented antenna moves, and is moved by fixed angular speed ω, and directional aerial central shaft is vertical with moving direction all the time, mobile Path is fixed multi-layer helical line, and moving process is from inside to outside, to start timing movement on the left of coordinate origin at coordinate, by 00:00 starts, periodic broadcast data packet, continues this process when anchor node is moved to right side (Rn/2,0) coordinate points Terminate；With the movement of anchor node, node to be positioned receives the data packet of anchor node broadcast by concentrating, and is received when for the first time During data packet, value is labeled as T at the time of when will receive data packet for the first time1 (1), and detect for the first time when receiving data packet Signal strength values, be denoted as RSSI1 (1)；When receiving data packet for the second time, at the time of when will receive data packet for the second time Value is labeled as T2 (1), and signal strength values when receiving data packet for the second time are detected, it is denoted as RSSI2 (1)；Repeat above procedure, Untill no longer detecting data packet；Finally detected moment value is Tn (1), signal strength values RSSIn (1)；Unknown node is according to T1 (1), Tn (1)And angular velocity omega calculates residing arc section and angle at present, obtains among virtual anchor node The angle of pointAndWhen unknown node is distributed on the outside of helix, a wheel data packet is received only, and when unknown When Node distribution is on the inside of helix, concentration receives two-wheeled data packet, respectively positioned at the equal angular direction of different segmental arcs, the Value and signal strength are respectively labeled as at the time of two wheels receiveWith Second wheel calculating process is identical with the first round, obtains intermediate point angleAndValue；If each unknown node only detects a wheel data, the position of the outer lateral extent d1 of the unknown node circular arc, d1 are positioned at Drawn by signal fadeout model conversation, the unknown node coordinate is then determined according to angle value；If detect two-wheeled data, root The unknown node coordinate is determined according to the less round information of RSSI value, and RSSI is smaller, and respective distances are bigger, and then section to be positioned The received data of point are more；The value of fixed intervals R is set according to directional antenna communications distance, is on the left of the coordinate origin：(-R/2,0)；Anchor node Right side coordinate points are：(Rn/2,0) coordinate points；Location service elements calculate household position and serve data to client terminal by network service interface；The location service elements periodically send exploration carrier signal by built-in read module first, calculate each visit The return signal intensity RSS and ambient signal strength RSSe in rope cycle；Secondly RSS is modified with RSSe, obtains having for the return of the responder module built in the bluetooth module of detective period household Signal strength RSSr is imitated, the average RSSa for calculating the valid signal strengths of multiple detective periods is strong as the return signal of transponder Degree；The RSSa obtained after finally being stablized according to the read module, by tabling look-up or being calculated the responder module with reading The distance between module, realizes the accurate positionin of responder module；It is a bit of carrier signal that read module is periodically launched that responder module, which explores signal, each segment Carrier cycle issue is N, can be determined between each segment at intervals of T, T and N by testing：The value of N ensures responder module day Line senses enough energy；The value of T will ensure the return signal of the previous detective period of responder module without interference with this cycle The calculating of signal strength signal, i.e., the energy complete attenuation that a cycle receives on responder module；Read module measuring environment signal strength RSSe first；Then the detection carrier signal in N number of cycle is launched, in addition Return signal intensity RSS is measured afterwards, and measuring method is identical twice, and forms a detective period, is somebody's turn to do according to RSSe and RSS The valid signal strengths RSSr of detective period；With the signal strength RSS obtained after emission detection carrier wave, have ready conditions and subtract ambient signal strength RSSe, such as formula：<mrow> <mi>R</mi> <mi>S</mi> <mi>S</mi> <mi>r</mi> <mo>=</mo> <mfenced open = "{" close = ""> <mtable> <mtr> <mtd> <mrow> <mn>0</mn> <mo>,</mo> </mrow> </mtd> <mtd> <mrow> <mi>i</mi> <mi>f</mi> <mi> </mi> <mi>R</mi> <mi>S</mi> <mi>S</mi> <mo><</mo> <mi>R</mi> <mi>S</mi> <mi>S</mi> <mi>e</mi> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <mi>R</mi> <mi>S</mi> <mi>S</mi> <mo>-</mo> <mi>R</mi> <mi>S</mi> <mi>S</mi> <mi>e</mi> <mo>,</mo> </mrow> </mtd> <mtd> <mrow> <mi>e</mi> <mi>l</mi> <mi>s</mi> <mi>e</mi> </mrow> </mtd> </mtr> </mtable> </mfenced> <mo>;</mo> </mrow>The average value of the RSSr of M detective period is taken to form a signal strength update cycle, such as formula as RSSa：<mrow> <mi>R</mi> <mi>S</mi> <mi>S</mi> <mi>a</mi> <mo>=</mo> <mfrac> <mn>1</mn> <mi>M</mi> </mfrac> <munderover> <mo>&Sigma;</mo> <mrow> <mi>i</mi> <mo>=</mo> <mn>1</mn> </mrow> <mi>M</mi> </munderover> <msub> <mi>RSSr</mi> <mi>i</mi> </msub> <mo>;</mo> </mrow>All households connect client terminal by built Bluetooth module and provide position information data to client terminal；Bluetooth sensing unit filters out household blue-teeth data by the household around built-in low-power consumption bluetooth detection module scanning Bag, obtains household bluetooth signal intensity；It will obtain household bluetooth signal intensity and the location service elements are sent to by mixed-media network modules mixed-media；The UUID of household and the data pair of signal strength that location service elements send each bluetooth sensing unit, make according to UUID Data update is carried out for major key；When needing to carry out location Calculation to the household of some UUID, take out the UUID and correspond to each bluetooth sense The newest signal strength data sent of unit is answered, carries out location Calculation.
- 2. smart home device assisted location method as claimed in claim 1, it is characterised in that the read module is by FPGA moulds Block, radiating circuit module, receiving circuit module, amplification filter module, AD conversion module；Radiating circuit module and receive circuit mould Block is connected with antenna：FPGA module, knows for input and output control, task scheduling, signal modulation, a/d converter control, digital filtering, waveform Do not calculated with RSS；Radiating circuit module, is connected with FPGA module, for modulated signal to be carried out power amplification, is launched by antenna Go；Receiving circuit module, is connected with radiating circuit module, is connected with antenna, for receiving transponder return signal from antenna；Amplify filter module, be connected with receiving circuit module, the return signal received belongs to small-signal, which is carried out Sampling can be just digitized after filter and amplification；AD conversion module, is connected with amplification filter module, for periodic sampling to be fixed to amplifying filtered signal；The FPGA module further comprises：Input and output controller, for carrying out encoding and decoding to input through keyboard, generates user command；Signal modulation module, for carrier signal generation and the order for being sent to transponder will be needed to be modulated at carrier signal On；Digital filtering module, the digital signal for being obtained to sampling carry out bandwidth filtering, remove interference；Waveform recognition module, for calculating local maximum to filtered digital signal, identifies the waveform of a cycle；RSS is calculated and decoder module, for calculating received signal strength from Wave data, the volume according to transponder return signal Code rule, decodes signal, the data that extraction responder module returns.
- 3. smart home device assisted location method as claimed in claim 1, it is characterised in that the location service elements pass through Mixed-media network modules mixed-media is communicated with picture recognition module；Described image identification module is by mixed-media network modules mixed-media and connection figure as editor module Communication；Described image editor module connects remote control module by mixed-media network modules mixed-media；Described image identification module is provided with digital analog converter.
- 4. smart home device assisted location method as claimed in claim 3, it is characterised in that the 3-D scanning module generation Image scaled be 1：1.
- 5. smart home device assisted location method as claimed in claim 3, it is characterised in that described image editor module is set There are 3 d modeling software and wireless launcher；The remote control module is provided with wireless receiving and emitter.
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