CN113490271B - 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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- CN113490271B CN113490271B CN202110769118.0A CN202110769118A CN113490271B CN 113490271 B CN113490271 B CN 113490271B CN 202110769118 A CN202110769118 A CN 202110769118A CN 113490271 B CN113490271 B CN 113490271B
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000004891 communication Methods 0.000 claims description 9
- 238000012937 correction Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 230000007613 environmental effect Effects 0.000 claims description 3
- 238000012360 testing method Methods 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
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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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
-
- 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
Abstract
The invention discloses a positioning searching method based on Bluetooth and GPS linkage, which adopts Bluetooth positioning, closes a GPS module and an LTE module on equipment to be searched when the positioning searching method is close, calculates the distance d between a mobile terminal and the equipment to be searched through a Bluetooth signal RSSI value, determines the position information coordinates of the equipment to be searched and the mobile terminal, and opens a built-in map on the mobile terminal to guide a user to search a target Bluetooth equipment. And when the mobile terminal is in a long distance, GPS positioning is adopted, a Bluetooth module on the equipment to be searched is closed, the position coordinates of the equipment to be searched are recorded through the GPS module and are sent to the mobile terminal through the LTE module, and a built-in map is opened on the mobile terminal to guide a user to search the target Bluetooth equipment. When the mobile terminal and the equipment to be searched are close again, the GPS positioning is converted into the Bluetooth positioning, so that different precision requirements of long-distance positioning 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
Currently, short-range 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 technology. The positioning is to realize the position positioning in the indoor environment, and is mainly a set of indoor position positioning system formed by integrating a plurality of technologies such as wireless communication, base station positioning, inertial navigation positioning and the like. Bluetooth is widely used in short-range wireless communications, and is a function of locating and locating specific objects, such as wallets, vehicles or young children, elderly people, etc., and locating devices.
Most of the current common positioning devices adopt a single positioning mode, such as Bluetooth, wiFi, GPS and the like. Single remote positioning has the disadvantage of having too large a target range, and single short-range positioning has the disadvantage of having too short a distance to fail once out of range. Therefore, the current situation that the positioning accuracy is low, the searching success rate is low and the efficiency is low is 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 defects, the invention aims to provide the positioning searching method based on the Bluetooth and GPS linkage, which can automatically switch the Bluetooth and GPS positioning according to the distance, improve the positioning precision, and effectively reduce the overall power consumption of the equipment to be searched at the same time, thereby achieving longer service time.
In order to achieve the above purpose, the invention adopts the following technical scheme: a positioning and searching method based on Bluetooth and GPS linkage is characterized in that: the method comprises the following steps:
step 1, starting Bluetooth and establishing connection for both a mobile terminal and equipment to be searched, and searching a Bluetooth signal RSSI value of the equipment to be searched by the mobile terminal;
step 2, the mobile terminal judges whether to find the RSSI value of the Bluetooth signal, 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 a Bluetooth signal RSSI value, 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 a target Bluetooth device;
step 4, closing a Bluetooth module on the equipment to be searched, starting a GPS module and an 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 a target Bluetooth device;
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 searched 1 And determine the distance L 1 If the threshold value is smaller than the threshold value I, 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 positioning is adopted, when the mobile terminal is far away, the GPS positioning is adopted, and when the mobile terminal is close to the equipment to be searched again, the remote GPS positioning is converted into the close Bluetooth positioning, so that different precision requirements of the remote positioning and the close positioning are met, and the whole power consumption of the equipment to be searched can be effectively reduced, so that the longer service time is achieved.
Further toThe calculating of the distance d between the mobile terminal and the device to be searched in the 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 collecting the set number of Bluetooth signal RSSI values, three groups of signal values with highest Bluetooth signal RSSI values are taken from the background and the median RSSI value is calculated mid The method comprises the steps of carrying out a first treatment on the surface of the Through median RSSI mid The distance d, d=10++abs (RSSI) is calculated using the signal distance formula mid ) -a)/(10 x n)), where a is the absolute value of the RSSI value at 1m from the detection device, abs is an absolute function, and n is the environmental attenuation factor, requiring test correction. And after the completion, clearing the signal group data of the background, and carrying out the next distance d calculation.
Further, the determining the position information coordinates of the mobile terminal in the 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 obtained position information in the 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, wherein the position information coordinates of the mobile terminal are ((x1+x2+x3)/3, (y1+y2+y3)/3), X1, X2 and X3 are the X coordinates of three groups of position information, and Y1, Y2 and Y3 are the Y coordinates of three groups of position information.
Furthermore, 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 second set threshold value, the position information is filtered. The second threshold may be set to 0, i.e., the mobile terminal position is not moving, and the coordinates are filtered.
Further, the location information coordinates of the device to be searched in the step 3 are the location information coordinates of the last mobile terminal.
Further, the position coordinates of the device to be searched in the step 4 are collected by the GPS module of the device to be searched, and when the fact that the non-moving time of the device to be searched exceeds the threshold value three is monitored, the LTE module enters a standby state, and the sending of the position coordinates of the device to be searched towards the mobile device is stopped. The threshold three can be 3 minutes, and when the equipment to be searched is not moved for more than three minutes, the equipment enters a static state, and the LTE module stands by and can display static on a map.
Further, the priority of the position information coordinates of the device to be searched calculated through the RSSI value of the Bluetooth signal is higher than that of the position coordinates of the device to be searched recorded by the GPS module. When the positioning mode is switched from GPS positioning to Bluetooth positioning, the mobile terminal is connected with the equipment to be searched in Bluetooth, and the distance d between the mobile terminal and the equipment to be searched is calculated through the RSSI value of Bluetooth signals and is smaller than the distance L between the mobile terminal and the equipment to be searched, which is recorded by the GPS module 1 And when the device is in the process, the position coordinates of the device to be searched are recorded again through the RSSI value of the Bluetooth signal.
Further, the map built in the mobile terminal comprises a general map or a satellite map, and a compass is displayed on the map.
Furthermore, the mobile terminal is a mobile phone or a tablet with Bluetooth and GPS functions and system software, the mobile terminal is also provided with a map, the equipment to be searched is arranged on an object to be positioned, 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 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 Bluetooth unit 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 an embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making clear and defining the scope of the present invention.
Examples
Referring to fig. 1, the positioning searching method based on Bluetooth and GPS linkage of the invention comprises the following steps:
and step 1, starting Bluetooth and establishing connection of the mobile terminal and the equipment to be searched, and searching the Bluetooth signal RSSI value of the equipment to be searched by the mobile terminal.
And 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.
And 3, closing a GPS module and an 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 collecting the set number of Bluetooth signal RSSI values, three groups of signal values with highest Bluetooth signal RSSI values are taken from the background and the median RSSI value is calculated mid . Through median RSSI mid The distance d, d=10++abs (RSSI) is calculated using the signal distance formula mid ) -a)/(10 x n)), where a is the absolute value of the RSSI value at 1m from the detection device, abs is an absolute function, and n is the environmental attenuation factor, requiring test correction. And after the completion, clearing the signal group data of the background, and carrying out the next distance d calculation.
And determining the position information coordinates of the equipment to be searched and the mobile terminal.
The position information coordinate determining step 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 obtained position information in the 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, wherein the position information coordinates of the mobile terminal are ((x1+x2+x3)/3, (y1+y2+y3)/3), X1, X2 and X3 are the X coordinates of three groups of position information, and Y1, Y2 and Y3 are the 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 moving, and the coordinates are filtered. When the GPS module signal of the mobile terminal is too weak, the acquired coordinates are filtered as well. The position information coordinate of the equipment to be searched is the position information coordinate of the last mobile terminal.
And opening a built-in map on the mobile terminal to guide a user to search for the target Bluetooth device. And calling a map on the mobile terminal, displaying the position information coordinates of the equipment to be searched on the map as a destination, displaying the routes of the mobile terminal and the equipment to be searched on the map, and displaying the distance between the mobile terminal and the route of the equipment to be searched on the map.
And 4, closing a Bluetooth module on the equipment to be searched, starting a GPS module and an 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 the target Bluetooth equipment.
At this time, the position coordinates of the equipment to be searched are collected by the GPS module of the equipment to be searched, and when the fact that the non-moving time of the equipment to be searched exceeds the threshold value III is monitored, the LTE module enters a standby state, and the position coordinates of the equipment to be searched are stopped from being sent towards the mobile device. The threshold three can be 3 minutes, and when the equipment to be searched is not moved for more than three minutes, the equipment enters a static state, and the LTE module stands by and can display static on a map. And the position information coordinate determining 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 searched 1 And determine the distance L 1 If the threshold value is smaller than the threshold value I, 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, which is calculated through the RSSI value of the Bluetooth signal, is larger 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 connected with the Bluetooth of the equipment to be searched, and 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 L between the mobile terminal and the equipment to be searched, which is recorded by the GPS module 1 When the device is in use, the position of the device to be searched is recorded again through the RSSI value of the Bluetooth signalAnd (5) setting coordinates.
When the mobile terminal is close to the equipment to be searched, the Bluetooth positioning is adopted, when the mobile terminal is far away, the GPS positioning is adopted, and when the mobile terminal is close to the equipment to be searched again, the remote GPS positioning is converted into the close Bluetooth positioning, so that different precision requirements of the remote positioning and the close positioning are met, and the whole power consumption of the equipment to be searched can be effectively reduced, so that 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 with 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 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 GPS positioning unit is used for acquiring position information of the device to be searched, and sending the acquired 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 bluetooth unit and the mobile terminal.
The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and to implement the same, but are not intended to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.
Claims (7)
1. A positioning and searching method based on Bluetooth and GPS linkage is characterized in that: the method comprises the following steps:
step 1, starting Bluetooth and establishing connection for both a mobile terminal and equipment to be searched, and searching a Bluetooth signal RSSI value of the equipment to be searched by the mobile terminal;
step 2, the mobile terminal judges whether to find the RSSI value of the Bluetooth signal, 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 a Bluetooth signal RSSI value, 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 a target Bluetooth device;
wherein the position information coordinate determination of the mobile terminal includes the steps of: 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 obtained position information in a background of the mobile terminal and continuously updating; determining the position information coordinates of the mobile terminal by adopting a three-point center coordinate formula;
the position information coordinate of the equipment to be searched is the position information coordinate of the last mobile terminal;
step 4, closing a Bluetooth module on the equipment to be searched, starting a GPS module and an 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 a target Bluetooth device;
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 searched 1 And determine the distance L 1 If the threshold value is smaller than the threshold value I, returning to the step 1; if not, returning to the step 4;
the priority of the position information coordinates of the equipment to be searched, which is calculated through the RSSI value of the Bluetooth signal, is larger than that of the position coordinates of the equipment to be searched recorded by the GPS module, when the mobile terminal is connected with the Bluetooth of 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 is smaller than that between the mobile terminal recorded by the GPS module and the position coordinates of the equipment to be searched are recorded again through the RSSI value of the Bluetooth signal.
2. The positioning searching method based on Bluetooth and GPS linkage as claimed in claim 1, wherein: the calculating of the distance d between the mobile terminal and the equipment to be searched in the step 3 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; collectingAfter the set number of the RSSI values of the Bluetooth signals is reached, the signal value with the highest RSSI value of the three groups of Bluetooth signals is taken from the background and the median RSSI value is calculated mid The method comprises the steps of carrying out a first treatment on the surface of the Through median RSSI mid Calculating a distance d by using a signal distance formula; and clearing the signal group data of the background after completion.
3. The positioning searching method based on Bluetooth and GPS linkage as claimed in claim 2, wherein: the distance d is d=10 ((ABS (RSSI) mid ) -a)/(10 x n)), where a is the absolute value of the RSSI value at 1m from the detection device, abs is an absolute function, and n is the environmental attenuation factor, requiring test correction.
4. The positioning searching method based on Bluetooth and GPS linkage as claimed in claim 1, wherein: and when the current speed is lower than a second set threshold value, filtering the position information.
5. The positioning searching method based on Bluetooth and GPS linkage as claimed in claim 1, wherein: and 4, acquiring the position coordinates of the equipment to be searched by a GPS module of the equipment to be searched, and when the condition that the non-moving time of the equipment to be searched exceeds a threshold value III is monitored, enabling the LTE module to enter a standby state, and stopping sending the position coordinates of the equipment to be searched towards the mobile device.
6. The positioning searching method based on Bluetooth and GPS linkage as claimed in claim 1, wherein: the map built in the mobile terminal comprises a general map or a satellite map, and a compass is displayed on the map.
7. The positioning searching method based on the Bluetooth and GPS linkage according to any one of claims 1-6, wherein the positioning searching method is characterized in that: the mobile terminal is a mobile phone or a tablet with Bluetooth and GPS functions and system software, the mobile terminal is also provided with a map, the equipment to be searched is arranged on an object to be positioned and comprises a GPS positioning unit, a Bluetooth unit and an 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 Bluetooth unit and the mobile terminal.
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| CN114419840A (en) * | 2022-01-06 | 2022-04-29 | 圣东尼（上海）针织机器有限公司 | Positioning anti-lost device |
| 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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