CN113490271A - Positioning searching method based on Bluetooth and GPS linkage - Google Patents
Positioning searching method based on Bluetooth and GPS linkage Download PDFInfo
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- CN113490271A CN113490271A CN202110769118.0A CN202110769118A CN113490271A CN 113490271 A CN113490271 A CN 113490271A CN 202110769118 A CN202110769118 A CN 202110769118A CN 113490271 A CN113490271 A CN 113490271A
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000004891 communication Methods 0.000 claims description 11
- 230000007613 environmental effect Effects 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 2
- 230000003068 static effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
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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
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
- G01S5/0252—Radio frequency fingerprinting
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
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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
- H04W64/006—Locating users or terminals or network equipment for network management purposes, e.g. mobility management with additional information processing, e.g. for direction or speed determination
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
- Navigation (AREA)
Abstract
The invention discloses a positioning and searching method based on Bluetooth and GPS linkage, which is characterized in that when the distance is short, Bluetooth positioning is adopted, a GPS module and an LTE module on equipment to be searched are closed, the distance d between a mobile terminal and the equipment to be searched is calculated through a Bluetooth signal RSSI value, the position information coordinates of the equipment to be searched and the mobile terminal are determined, and a built-in map is started on the mobile terminal to guide a user to search target Bluetooth equipment. When the distance is long, the GPS is adopted for positioning, the Bluetooth module on the equipment to be searched is closed, the position coordinate of the equipment to be searched is recorded through the GPS module and is sent to the mobile terminal through the LTE module, and the built-in map is opened on the mobile terminal to guide a user to search the target Bluetooth equipment. And when the mobile terminal and the equipment to be searched get close to each other again, GPS positioning is converted into Bluetooth positioning, different precision requirements of long-distance and short-distance positioning are met, and the overall power consumption of the equipment to be searched can be effectively reduced.
Description
Technical Field
The invention relates to the technical field of positioning and searching, in particular to a positioning and searching method based on Bluetooth and GPS linkage.
Background
At present, short-distance wireless communication technology is widely applied to a plurality of electronic devices, such as smart phones, bracelets, wearable devices, sensors and the like. These electronic devices support positioning technologies. The positioning refers to the realization of position positioning in an indoor environment, and mainly adopts a set of indoor position positioning system formed by integrating various technologies such as wireless communication, base station positioning, inertial navigation positioning and the like. Bluetooth is widely used in short-range wireless communication, and how to find and locate some specific objects, such as a wallet, a vehicle or a child, an old person, etc., locator is used.
Most of the current common positioning devices adopt a single positioning mode, such as bluetooth, WiFi, GPS, etc. A single long range location has the disadvantage of having an excessively large target range, and a single short range location has the disadvantage of being too short of range to be effective once out of range. Therefore, the current situations of low positioning accuracy, low searching success rate and low efficiency are caused. How to improve the positioning and searching precision and reduce the power consumption of the anti-lost device becomes a problem to be solved.
Disclosure of Invention
In order to overcome the above disadvantages, the present invention provides a positioning and searching method based on bluetooth and GPS linkage, which can automatically switch between bluetooth and GPS positioning according to distance, thereby improving positioning accuracy and effectively reducing the overall power consumption of the device to be searched, so as to achieve longer service life.
In order to achieve the above purposes, the invention adopts the technical scheme that: a positioning searching method based on Bluetooth and GPS linkage is characterized in that: the method comprises the following steps:
step 1, the mobile terminal and the device to be searched start Bluetooth and establish connection, and the mobile terminal searches the RSSI value of the Bluetooth signal of the device to be searched;
step 2, the mobile terminal judges whether the RSSI value of the Bluetooth signal is found, if so, the step 3 is executed, and if not, the step 4 is executed;
step 3, closing a GPS module and an LTE module on the equipment to be searched, calculating the distance d between the mobile terminal and the equipment to be searched through the RSSI value of the Bluetooth signal, determining the position information coordinates of the equipment to be searched and the mobile terminal, and starting a built-in map on the mobile terminal to guide a user to search for target Bluetooth equipment;
step 4, closing the Bluetooth module on the equipment to be searched, starting the GPS module and the LTE module on the equipment to be searched, recording the position coordinates of the equipment to be searched through the GPS module, sending the position coordinates to the mobile terminal through the LTE module, and starting a built-in map on the mobile terminal to guide a user to search for target Bluetooth equipment;
step 5, the mobile terminal calculates the distance L between the mobile terminal and the equipment to be searched through the position coordinates of the equipment to be searched1And determining the distance L1Whether the value is less than the first threshold value or not, if so, returning to the step 1; if not, returning to the step 4.
The invention has the beneficial effects that: when the mobile terminal is close to the equipment to be searched, the Bluetooth is used for positioning, and when the mobile terminal is far away, the GPS is used for positioning, and when the mobile terminal is close to the equipment to be searched again, the remote GPS positioning is converted into the short-distance Bluetooth positioning, so that different precision requirements of the long-distance positioning and the short-distance positioning are met, the whole power consumption of the equipment to be searched can be effectively reduced, and the longer service time is achieved.
Further, the calculating the distance d between the mobile terminal and the device to be searched in step 3 includes the following steps: the mobile terminal acquires a plurality of groups of Bluetooth signal RSSI values every second; storing a plurality of groups of Bluetooth signal RSSI values in a background of the mobile terminal; after the set number of the Bluetooth signal RSSI values are collected, three groups of signal values with the highest Bluetooth signal RSSI values are taken from the background, and the median RSSI value of the three groups of signal values is calculatedmid(ii) a By median RSSImidCalculating the distance d by using a signal distance formula, wherein d is 10^ ((ABS (RSSI)mid) -a)/(10 x n)), where a is the absolute value of the RSSI value at 1m from the probing device, abs is a function of the absolute value, and n is the environmental attenuation factor, requiring test rectification. And after the completion, clearing the signal group data of the background, and calculating the distance d for the next time.
Further, the determining the location information coordinates of the mobile terminal in step 3 includes the following steps: and acquiring the position information of the mobile terminal in real time through a GPS module of the mobile terminal. And storing the plurality of groups of acquired position information in a background of the mobile terminal and continuously updating. The position information coordinates of the mobile terminal are determined by adopting a three-point center coordinate formula, wherein the position information coordinates of the mobile terminal are ((X1+ X2+ X3)/3, (Y1+ Y2+ Y3)/3), X1, X2 and X3 are X coordinates of three groups of position information, and Y1, Y2 and Y3 are Y coordinates of three groups of position information.
Further, when the position information of the mobile terminal is obtained in real time, the speed information of the mobile terminal is monitored, and when the current speed is lower than a set threshold value two, the position information is filtered. The second threshold may be set to 0, i.e. the mobile terminal position is not moved, and the coordinates are filtered.
Further, the location information coordinate of the device to be searched in step 3 is the location information coordinate of the last mobile terminal.
Further, the position coordinates of the device to be searched in step 4 are collected by a GPS module of the device to be searched, and when it is monitored that the unmoving time of the device to be searched exceeds a threshold value three, the LTE module enters a standby state and stops sending the position coordinates of the device to be searched toward the mobile device. The third threshold may be 3 minutes, and when the device to be searched does not move for more than three minutes, the device enters a static state, and at this time, the LTE module is in a standby state and can display a static state on the map.
Further, the priority of the position information coordinate of the device to be searched calculated through the RSSI value of the Bluetooth signal is higher than the position coordinate of the device to be searched recorded by the GPS module. And when the positioning mode is switched from GPS positioning to Bluetooth positioning, the mobile terminal is in Bluetooth connection with the equipment to be searched, the distance d between the mobile terminal and the equipment to be searched is calculated through the RSSI value of the Bluetooth signal, and the distance d is smaller than the distance L between the mobile terminal and the equipment to be searched, which is recorded by the GPS module1And recording the position coordinates of the equipment to be searched again through the RSSI value of the Bluetooth signal.
Further, the map built in the mobile terminal includes a general map or a satellite map, and a compass is displayed on the map.
Further, the mobile terminal is a mobile phone or a tablet with Bluetooth and GPS functions and system software, the mobile terminal is further provided with a map, the equipment to be searched is installed on the object to be located and comprises a GPS locating unit, a Bluetooth unit and an LTE communication unit, the microprocessor can be communicated with the LTE communication unit, the GPS locating unit is used for obtaining the position information of the equipment to be searched and sending the obtained position information to the mobile terminal through the LTE communication unit, and the Bluetooth unit is used for receiving and sending Bluetooth signals between the mobile terminal and the mobile terminal.
Drawings
FIG. 1 is a flow chart of an embodiment of the present invention;
fig. 2 is a block diagram of a device to be searched in the embodiment of the present invention.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.
Examples
Referring to the attached figure 1, the positioning and searching method based on the linkage of the Bluetooth and the GPS comprises the following steps:
step 1, the mobile terminal and the device to be searched start Bluetooth and establish connection, and the mobile terminal searches the RSSI value of the Bluetooth signal of the device to be searched.
And 2, the mobile terminal judges whether the RSSI value of the Bluetooth signal is searched, if so, the step 3 is executed, and if not, the step 4 is executed.
And 3, closing the GPS module and the LTE module on the equipment to be searched, and calculating the distance d between the mobile terminal and the equipment to be searched through the RSSI value of the Bluetooth signal.
The calculation of the distance d between the mobile terminal and the device to be searched comprises the following steps: the mobile terminal acquires a plurality of groups of Bluetooth signal RSSI values every second; storing a plurality of groups of Bluetooth signal RSSI values in a background of the mobile terminal; after the set number of the Bluetooth signal RSSI values are collected, three groups of signal values with the highest Bluetooth signal RSSI values are taken from the background, and the median RSSI value of the three groups of signal values is calculatedmid. By median RSSImidCalculating the distance d by using a signal distance formula, wherein d is 10^ ((ABS (RSSI)mid) -a)/(10 x n)), where a is the absolute value of the RSSI value at 1m from the probing device, abs is a function of the absolute value, and n is the environmental attenuation factor, requiring test rectification. And after the completion, clearing the signal group data of the background, and calculating the distance d for the next time.
And determining the position information coordinates of the equipment to be searched and the mobile terminal.
The method for determining the position information coordinates of the mobile terminal comprises the following steps: and acquiring the position information of the mobile terminal in real time through a GPS module of the mobile terminal. And storing the plurality of groups of acquired position information in a background of the mobile terminal and continuously updating. The position information coordinates of the mobile terminal are determined by adopting a three-point center coordinate formula, wherein the position information coordinates of the mobile terminal are ((X1+ X2+ X3)/3, (Y1+ Y2+ Y3)/3), X1, X2 and X3 are X coordinates of three groups of position information, and Y1, Y2 and Y3 are Y coordinates of three groups of position information. And when the current speed is lower than a second set threshold value, filtering the position information. The second threshold may be set to 0, i.e. the mobile terminal position is not moved, and the coordinates are filtered. When the signal of the GPS module of the mobile terminal is too weak, the collected coordinates are also filtered. And the position information coordinate of the equipment to be searched is the position information coordinate of the last mobile terminal.
And starting a built-in map on the mobile terminal to guide the user to search the target Bluetooth device. And calling a map on the mobile terminal, displaying the position information coordinates of the equipment to be searched as a destination on the map, displaying the routes of the mobile terminal and the equipment to be searched on the map by using the mobile terminal as an origin, and displaying the distance between the mobile terminal and the equipment to be searched.
And 4, closing the Bluetooth module on the equipment to be searched, starting the GPS module and the LTE module on the equipment to be searched, recording the position coordinates of the equipment to be searched through the GPS module, sending the position coordinates to the mobile terminal through the LTE module, and starting a built-in map on the mobile terminal to guide a user to search for the target Bluetooth equipment.
And at the moment, the position coordinate of the equipment to be searched is acquired by a GPS module of the equipment to be searched, and when the unmoving time of the equipment to be searched is monitored to exceed a threshold value III, the LTE module enters a standby state and stops sending the position coordinate of the equipment to be searched towards the mobile device. The third threshold may be 3 minutes, and when the device to be searched does not move for more than three minutes, the device enters a static state, and at this time, the LTE module is in a standby state and can display a static state on the map. And the position information coordinate determination method of the mobile terminal is the same as that in step 3.
Step 5, the mobile terminal calculates the distance L between the mobile terminal and the equipment to be searched through the position coordinates of the equipment to be searched1And determining the distance L1Whether the value is less than the first threshold value or not, if so, returning to the step 1; if not, returning to the step 4.
When the mobile terminal is connected with the equipment to be searched again, the priority of the position information coordinate of the equipment to be searched calculated through the RSSI value of the Bluetooth signal is higher than the position coordinate of the equipment to be searched recorded by the GPS module. When the positioning mode is switched from GPS positioning to Bluetooth positioning, the mobile terminal is in Bluetooth connection with the equipment to be searched, the distance d between the mobile terminal and the equipment to be searched is calculated through the RSSI value of the Bluetooth signal, and the distance d is smaller than the distance L between the mobile terminal and the equipment to be searched, which is recorded by the GPS module1And recording the position coordinates of the equipment to be searched again through the RSSI value of the Bluetooth signal.
When the mobile terminal is close to the equipment to be searched, the Bluetooth is used for positioning, and when the mobile terminal is far away, the GPS is used for positioning, and when the mobile terminal is close to the equipment to be searched again, the remote GPS positioning is converted into the short-distance Bluetooth positioning, so that different precision requirements of the long-distance positioning and the short-distance positioning are met, the whole power consumption of the equipment to be searched can be effectively reduced, and the longer service time is achieved.
The map built in the mobile terminal comprises a general map or a satellite map, and a compass is displayed on the map.
Referring to fig. 2, the mobile terminal is a mobile phone or tablet having bluetooth and GPS functions and installed with system software, the mobile terminal is further installed with a map, the device to be searched is installed on an object to be located, and includes a GPS positioning unit, a bluetooth unit and an LTE communication unit, where the microprocessor can be communicated with the microprocessor, the GPS positioning unit is used to acquire position information of the device to be searched, and send the acquired position information to the mobile terminal through the LTE communication unit, and the bluetooth unit is used to receive and send bluetooth signals with the mobile terminal.
The above embodiments are merely illustrative of the technical concept and features of the present invention, and the present invention is not limited thereto, and any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.
Claims (10)
1. A positioning searching method based on Bluetooth and GPS linkage is characterized in that: the method comprises the following steps:
step 1, the mobile terminal and the device to be searched start Bluetooth and establish connection, and the mobile terminal searches the RSSI value of the Bluetooth signal of the device to be searched;
step 2, the mobile terminal judges whether the RSSI value of the Bluetooth signal is found, if so, the step 3 is executed, and if not, the step 4 is executed;
step 3, closing a GPS module and an LTE module on the equipment to be searched, calculating the distance d between the mobile terminal and the equipment to be searched through the RSSI value of the Bluetooth signal, determining the position information coordinates of the equipment to be searched and the mobile terminal, and starting a built-in map on the mobile terminal to guide a user to search for target Bluetooth equipment;
step 4, closing the Bluetooth module on the equipment to be searched, starting the GPS module and the LTE module on the equipment to be searched, recording the position coordinates of the equipment to be searched through the GPS module, sending the position coordinates to the mobile terminal through the LTE module, and starting a built-in map on the mobile terminal to guide a user to search for target Bluetooth equipment;
step 5, the mobile terminal calculates the distance L between the mobile terminal and the equipment to be searched through the position coordinates of the equipment to be searched1And determining the distance L1Whether the value is less than the first threshold value or not, if so, returning to the step 1; if not, returning to the step 4.
2. The positioning and searching method based on the linkage of the Bluetooth and the GPS according to claim 1, characterized in that: the step 3 of calculating the distance d between the mobile terminal and the device to be searched includes the following steps: the mobile terminal acquires a plurality of groups of Bluetooth signal RSSI values every second; storing a plurality of groups of Bluetooth signal RSSI values in a background of the mobile terminal; after collecting the set number of the RSSI values of the Bluetooth signals, three groups of the RSSI values are taken from the backgroundCalculating the signal value with the highest RSSI value of the Bluetooth signals and calculating the value RSSI of the signal valuemid(ii) a By median RSSImidCalculating the distance d by using a signal distance formula; and clearing the signal group data of the background after the completion.
3. The positioning and searching method based on the linkage of the Bluetooth and the GPS according to claim 2, characterized in that: the distance d is determined by the method of d ^ 10 ((RSSI) ^ ABS (RSSI)mid) -a)/(10 x n)), where a is the absolute value of the RSSI value at 1m from the probing device, abs is a function of the absolute value, and n is the environmental attenuation factor, requiring test rectification.
4. The positioning and searching method based on the linkage of the Bluetooth and the GPS according to claim 1, characterized in that: the step 3 of determining the position information coordinate of the mobile terminal includes the following steps: acquiring the position information of the mobile terminal in real time through a GPS module of the mobile terminal; storing a plurality of groups of acquired position information in a background of the mobile terminal and continuously updating; and determining the position information coordinates of the mobile terminal by adopting a three-point center coordinate formula.
5. The positioning and searching method based on the linkage of the Bluetooth and the GPS according to claim 2, characterized in that: and when the current speed is lower than a second set threshold value, filtering the position information.
6. The bluetooth and GPS linkage-based location finding method according to claim 4, wherein: and the position information coordinate of the equipment to be searched in the step 3 is the position information coordinate of the last mobile terminal.
7. The positioning and searching method based on the linkage of the Bluetooth and the GPS according to claim 1, characterized in that: and 4, the position coordinates of the equipment to be searched are acquired by a GPS module of the equipment to be searched, and when the unmoving time of the equipment to be searched is monitored to exceed a threshold value III, the LTE module enters a standby state and stops sending the position coordinates of the equipment to be searched towards the mobile device.
8. The positioning and searching method based on the linkage of the Bluetooth and the GPS according to claim 1, characterized in that: when the mobile terminal is connected with the equipment to be searched in a Bluetooth mode, the distance d between the mobile terminal and the equipment to be searched is calculated through the RSSI value of the Bluetooth signal and is smaller than the distance between the mobile terminal and the equipment to be searched, which is recorded by the GPS module, the position coordinate of the equipment to be searched is recorded again through the RSSI value of the Bluetooth signal.
9. The positioning and searching method based on the linkage of the Bluetooth and the GPS according to claim 1, characterized in that: the map built in the mobile terminal comprises a general map or a satellite map, and a compass is displayed on the map.
10. The method of any one of claims 1-9 for location finding based on bluetooth and GPS linkage, wherein: the mobile terminal is a mobile phone or a tablet with Bluetooth and GPS functions and system software, a map is further installed on the mobile terminal, the equipment to be searched is installed on an object to be located, the mobile terminal comprises a GPS positioning unit, a Bluetooth unit and an LTE communication unit, the microprocessor can be communicated with the GPS positioning unit, the Bluetooth unit and the LTE communication unit, the GPS positioning unit is used for acquiring the position information of the equipment to be searched, the acquired position information is sent to the mobile terminal through the LTE communication unit, and the Bluetooth unit is used for receiving and sending Bluetooth signals between the mobile terminal and the mobile terminal.
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| CN116782123A (en) * | 2022-03-11 | 2023-09-19 | 广州星际悦动股份有限公司 | Positioning method, positioning device, electronic equipment, terminal and storage medium |
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| CN113490271B (en) | 2024-03-26 |
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Address after: Room 409, building 2, CHENLEI Science Park, 1 Qunxing 1st Road, Suzhou Industrial Park, 215000, Jiangsu Province Applicant after: Suzhou Tongchuang Information Technology Co.,Ltd. Address before: Room 409, building 2, CHENLEI Science Park, 1 Qunxing 1st Road, Suzhou Industrial Park, 215000, Jiangsu Province Applicant before: Suzhou Tongchuang Trading Co.,Ltd. |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |