CN113747357B - Bluetooth positioning method based on calibration parameters - Google Patents
Bluetooth positioning method based on calibration parameters Download PDFInfo
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- CN113747357B CN113747357B CN202111063348.1A CN202111063348A CN113747357B CN 113747357 B CN113747357 B CN 113747357B CN 202111063348 A CN202111063348 A CN 202111063348A CN 113747357 B CN113747357 B CN 113747357B
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000004891 communication Methods 0.000 claims description 16
- 238000001514 detection method Methods 0.000 claims description 6
- 230000000875 corresponding effect Effects 0.000 description 9
- 230000006870 function Effects 0.000 description 3
- 239000000470 constituent Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000002596 correlated effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Classifications
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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
- H04W4/02—Services making use of location information
- H04W4/023—Services making use of location information using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds
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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
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
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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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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
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Abstract
The invention discloses a Bluetooth positioning method based on calibration parameters, which comprises the following steps: the method comprises the steps that a Bluetooth connection is established between a first positioning module and mobile equipment; the first positioning module, the second Bluetooth module and the third Bluetooth module respectively detect RSSI values of the mobile equipment and correspondingly obtain the first RSSI value, the second RSSI value and the third RSSI value; the method comprises the steps that a first positioning module obtains calibration parameters of mobile equipment; the first positioning module carries out comprehensive operation on the first RSSI value, the second RSSI value and the third RSSI value to obtain actual parameters, and compares the actual parameters with calibration parameters to judge whether the mobile equipment is positioned in or out of the vehicle. Compared with the prior art, the embodiment of the invention provides the Bluetooth positioning method based on the calibration parameters, which can rapidly and simply judge whether the mobile equipment is positioned in the vehicle or outside the vehicle, thereby realizing rapid mobile equipment positioning and being used for reminding the forgetting of the key of the vehicle and starting the key.
Description
Technical Field
The invention relates to the technical field of mobile equipment positioning, in particular to a Bluetooth positioning method based on calibration parameters, which is used for judging whether mobile equipment is located in a parking space or outside a vehicle.
Background
At present, the Bluetooth positioning algorithm mostly adopts RSSI ranging positioning, obtains Bluetooth RSSI values of target objects through 3 to 4 Bluetooth modules, and calculates and determines the indoor positions of the target objects through a three-point ranging algorithm. However, in some situations, it is not necessary to locate a specific position of the target object, but it is required to quickly determine whether the target object is in a room (or in a car), and each time the target object may be a different device, if the three-point ranging algorithm is still adopted, the time and space requirements of the location cannot be met.
Disclosure of Invention
The embodiment of the invention provides a Bluetooth positioning method based on calibration parameters, which aims to solve the problem that the existing Bluetooth positioning method cannot meet the timeliness of simple judgment of mobile equipment.
In order to achieve the above purpose, the technical scheme provided by the invention is as follows:
the invention provides a Bluetooth positioning method based on calibration parameters, which is based on a system consisting of a vehicle, mobile equipment and a cloud server, wherein a first positioning module is configured in the vehicle, a second Bluetooth module and a third Bluetooth module are configured in the vehicle, and the mobile equipment is configured with the Bluetooth modules, and the method comprises the following steps:
the method comprises the steps that a Bluetooth connection is established between a first positioning module and mobile equipment;
the first positioning module, the second Bluetooth module and the third Bluetooth module respectively detect RSSI values of the mobile equipment and correspondingly obtain the first RSSI value, the second RSSI value and the third RSSI value;
the method comprises the steps that a first positioning module obtains calibration parameters of mobile equipment;
the first positioning module carries out comprehensive operation on the first RSSI value, the second RSSI value and the third RSSI value to obtain actual parameters, and compares the actual parameters with calibration parameters to judge whether the mobile equipment is positioned in or out of the vehicle.
The step of establishing bluetooth connection between the first positioning module and the mobile device comprises the following steps:
the first positioning module in the vehicle periodically transmits Bluetooth broadcasting signals outwards;
the mobile device scans for bluetooth broadcast signals and establishes a bluetooth connection with the first positioning module.
The step of detecting the RSSI value of the mobile device by the first positioning module, the second bluetooth module and the third bluetooth module respectively further includes:
the mobile device sends the device model of the mobile device to a cloud server;
and the cloud server inquires calibration parameters corresponding to the equipment model according to the received equipment model and sends the calibration parameters to a communication module of the vehicle.
The cloud server sends the calibration parameters to the communication module and then comprises the following steps: and the communication module sends the calibration parameters to the first positioning module.
The step of detecting the RSSI value of the mobile device by the first positioning module, the second Bluetooth module and the third Bluetooth module respectively comprises the following steps:
the first positioning module sends instructions to the second Bluetooth module and the third Bluetooth module in a CAN bus mode, so that the second Bluetooth module and the third Bluetooth module are respectively connected with the mobile device in a Bluetooth mode.
The calibration parameters in the step of acquiring the calibration parameters of the mobile equipment by the first positioning module are acquired through the following steps:
selecting a plurality of mobile devices with different models, and placing the selected mobile devices at different detection positions in the vehicle one by one;
detecting RSSI values of the mobile equipment by a first positioning module, a second Bluetooth module and a third Bluetooth module respectively;
respectively calculating RSSI average values of different detection positions of the first positioning module, the second Bluetooth module and the third Bluetooth module in the vehicle aiming at the mobile equipment of the same model; and
and coding the RSSI average value, and adding an algorithm identifier and a CRC check bit on the code to generate a calibration parameter.
The first positioning module is arranged at the central position in the vehicle, the second Bluetooth module and the third Bluetooth module are symmetrically arranged at the left side and the right side of the vehicle body, and the first positioning module, the second Bluetooth module and the third Bluetooth module are positioned on the same straight line.
Wherein the mobile device comprises: smart phone, intelligent flat board, intelligent wrist-watch.
Compared with the prior art, the embodiment of the invention provides a Bluetooth positioning method based on calibration parameters, which establishes Bluetooth connection with a first positioning module positioned in a vehicle, a second Bluetooth module positioned in the vehicle body and a third Bluetooth module through mobile equipment, inquires the calibration parameters corresponding to the model of the mobile equipment through a cloud server, and compares the calibration parameters with actual additional measurement parameters, so that whether the mobile equipment is positioned in the vehicle or outside the vehicle is judged, quick mobile equipment positioning is realized, and the method can be used for reminding forgetting of a key of the vehicle and one-key starting.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of an application scenario of a bluetooth positioning method based on calibration parameters according to an embodiment of the present invention;
fig. 2 is a main flow chart of a bluetooth positioning method based on calibration parameters according to an embodiment of the present invention.
Fig. 3 is a sub-flowchart of a bluetooth positioning method based on calibration parameters according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be understood that the terms "comprises" and "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
Referring to fig. 1 and 2, fig. 1 is a schematic diagram of an application scenario of a bluetooth positioning method based on calibration parameters according to an embodiment of the present invention, where the bluetooth positioning method based on calibration parameters is based on a system composed of a vehicle, a mobile device and a cloud server, a first positioning module is configured in the vehicle, a second bluetooth module and a third bluetooth module are configured in the vehicle, and the mobile device is configured with a bluetooth module, and includes the following steps:
step S100, a first positioning module establishes Bluetooth connection with mobile equipment; the first positioning module is provided with a Bluetooth module, can establish Bluetooth communication connection with the mobile equipment, has a data processing function, can receive external data and operate the data, and can also establish communication connection with the vehicle-mounted T-BOX and establish network communication with the vehicle-mounted computer.
Step S200, a first positioning module, a second Bluetooth module and a third Bluetooth module respectively detect RSSI values of mobile equipment and correspondingly obtain a first RSSI value, a second RSSI value and a third RSSI value; RSSI value, namely bluetooth signal intensity, and the distance between bluetooth connection's the equipment is correlated to, RSSI value can reflect the distance information between first orientation module, second bluetooth module, third bluetooth module and the mobile device. The second bluetooth module and the third bluetooth module may start to detect the RSSI value of the mobile device based on the instruction of the first certain module, or may be program instructions based on the vehicle-mounted T-BOX. After the first positioning module establishes Bluetooth connection with the mobile equipment, the Bluetooth address of the mobile equipment can be obtained, and at the moment, the Bluetooth address of the mobile equipment can be directly or indirectly sent to the second Bluetooth module and the third Bluetooth module, and the second Bluetooth module and the third Bluetooth module can establish Bluetooth connection with the mobile equipment, so that the RSSI value between the second Bluetooth module and the third Bluetooth module can be rapidly detected.
Step S300, a first positioning module acquires calibration parameters of the mobile equipment; the calibration parameters are RSSI average values of mobile equipment with different models in or out of the vehicle, or set range values, and the calibration parameters are obtained and generated by the mobile equipment and stored in a memory or a server.
And step 400, the first positioning module carries out comprehensive operation on the first RSSI value, the second RSSI value and the third RSSI value to obtain actual parameters, and compares the actual parameters with calibration parameters to judge whether the mobile equipment is positioned in or outside the vehicle. The first positioning module performs comprehensive operation, such as average value and the like, according to the actually detected first RSSI value, second RSSI value and third RSSI value, compares the calculated actual measured value with calibration parameters of corresponding mobile equipment obtained from a server or a memory, and indicates that the mobile equipment is currently located in the vehicle if the calculated actual measured value is within a set error range, or the mobile equipment is located outside the vehicle.
The step S100 of establishing bluetooth connection between the first positioning module and the mobile device includes:
step S101, a first positioning module in a vehicle periodically transmits Bluetooth broadcasting signals outwards; the broadcast signal is an open Bluetooth connection signal, and can establish communication connection with any mobile device with a Bluetooth function module.
Step S102, the mobile device scans Bluetooth broadcast signals and establishes Bluetooth connection with the first positioning module. When the current position relation between the mobile device and the vehicle needs to be determined, a user opens the Bluetooth function of the mobile device, scans surrounding Bluetooth signals, and establishes Bluetooth connection with the first positioning module.
The step of detecting the RSSI value of the mobile device by the first positioning module, the second bluetooth module and the third bluetooth module respectively further includes:
step S201, the mobile device sends the device model of the mobile device to a cloud server; for example, when the mobile device is a mobile phone, a corresponding APP is configured on the mobile phone, and when a bluetooth connection with the first positioning module is established, the APP automatically transmits the mobile phone model to the cloud server.
Step S202, the cloud server inquires calibration parameters corresponding to the equipment model according to the received equipment model, and sends the calibration parameters to a communication module of the vehicle. The cloud server stores calibration parameter lists of various types of equipment, calibration parameters of the mobile equipment are collected according to actual demands, when the model of specific mobile equipment is received, the stored calibration parameter list is automatically inquired, the corresponding calibration parameters are sent to a communication module of the vehicle, identification codes are arranged between the communication module of the vehicle and the first positioning module, after the mobile equipment is connected with the first positioning module and the equipment model is sent, system connection is automatically established among the mobile equipment, the cloud server, the first positioning module and the communication module, namely, system constituent units of which all constituent parts are positioned at one time are confirmed.
The cloud server sends the calibration parameters to the communication module and then comprises the following steps: the communication module sends the calibration parameters to the first positioning module in step S203.
In this embodiment, before the steps of detecting the RSSI values of the mobile device by the first positioning module, the second bluetooth module, and the third bluetooth module, the method further includes the following steps:
step S204, the first positioning module sends instructions to the second Bluetooth module and the third Bluetooth module through a CAN bus mode, so that the second Bluetooth module and the third Bluetooth module respectively establish Bluetooth connection with the mobile device. The definition positioning module sends the Bluetooth address of the mobile device to the second Bluetooth module and the third Bluetooth module so that the second Bluetooth module and the third Bluetooth module can establish Bluetooth communication connection with the mobile device.
Referring to fig. 3 again, the calibration parameters in the step S300 of the first positioning module obtaining the calibration parameters of the mobile device are obtained by the following steps:
step 301, selecting a plurality of mobile devices with different models, and placing the selected mobile devices at different detection positions in a vehicle one by one;
step S302, detecting RSSI values of the mobile equipment by a first positioning module, a second Bluetooth module and a third Bluetooth module respectively;
step S303, RSSI average values of different detection positions of the mobile equipment of the same model in the vehicle are calculated by the first positioning module, the second Bluetooth module and the third Bluetooth module respectively; and
and step S304, coding the RSSI average value, and adding an algorithm identifier and a CRC check bit on the code to generate a calibration parameter.
For example:
selecting a batch of mobile equipment (determined according to project requirements), under the condition that door handle states are different (for example, a telescopic door handle exists), sequentially placing the mobile equipment at appointed positions in a vehicle, acquiring the RSSI values of the mobile equipment, which are acquired by a left door handle positioning module, a right door handle positioning module and a door handle positioning module in the vehicle, by using an acquisition tool, acquiring 30 seconds at each position, filtering data after all appointed position data are acquired (removing unavailable values such as 0 value), calculating the RSSI average value of the left door handle positioning module, the RSSI average value of the right door handle positioning module, the RSSI value of the door positioning module in the vehicle, the RSSI threshold of the left door handle positioning module at an appointed point, the RSSI threshold of the right door handle positioning module at an appointed point, adding a positioning algorithm identifier and a CRC check position of the mobile equipment, and generating calibration parameters of the mobile equipment. When data is acquired, environment variables (such as the position of a tester, the working conditions inside and outside a vehicle, the placement position of acquisition equipment and the like) are ensured to be consistent as much as possible. And each mobile device generates calibration parameters according to the method. And finally uploading a calibration parameter table (containing a calibration vehicle type, a mobile phone model, calibration parameters, calibration time and a positioning algorithm) to the cloud server.
Specifically, in this embodiment, the first positioning module is disposed at a central position in the vehicle, the second bluetooth module and the third bluetooth module are symmetrically disposed at left and right sides of the vehicle body, and the first positioning module, the second bluetooth module and the third bluetooth module are located on the same straight line. That is, the first positioning module is located at the middle armrest position of the front seat of the vehicle, and the corresponding second bluetooth module and third bluetooth module are respectively arranged on the handles of the left front door and the right front door.
Wherein the mobile device comprises: intelligent terminal equipment such as smart mobile phone, intelligent flat board, intelligent wrist-watch.
Compared with the prior art, the embodiment of the invention provides a Bluetooth positioning method based on calibration parameters, which establishes Bluetooth connection with a first positioning module positioned in a vehicle, a second Bluetooth module positioned in the vehicle body and a third Bluetooth module through mobile equipment, inquires the calibration parameters corresponding to the model of the mobile equipment through a cloud server, and compares the calibration parameters with actual additional measurement parameters, so that whether the mobile equipment is positioned in the vehicle or outside the vehicle is judged, quick mobile equipment positioning is realized, and the method can be used for reminding forgetting of a key of the vehicle and one-key starting.
The foregoing is merely illustrative of the preferred embodiments of the present invention and is not intended to limit the embodiments of the present invention, and those skilled in the art can easily make corresponding variations or modifications according to the main concept and spirit of the present invention, so the protection scope of the present invention shall be defined by the claims.
Claims (2)
1. The utility model provides a bluetooth positioning method based on calibration parameter, its system based on vehicle, mobile device and high in the clouds server are constituteed, the car of vehicle is configured with first positioning module, and the automobile body is configured with second bluetooth module and third bluetooth module, mobile device is configured with bluetooth module, characterized by, include the following steps:
the mobile device sends the device model of the mobile device to a cloud server;
the cloud server inquires calibration parameters corresponding to the equipment model according to the received equipment model, and sends the calibration parameters to a communication module of the vehicle;
the communication module sends the calibration parameters to the first positioning module;
the method comprises the steps that a Bluetooth connection is established between a first positioning module and mobile equipment;
the first positioning module, the second Bluetooth module and the third Bluetooth module respectively detect RSSI values of the mobile equipment and correspondingly obtain the first RSSI value, the second RSSI value and the third RSSI value;
the method comprises the steps that a first positioning module obtains calibration parameters of mobile equipment;
the first positioning module carries out comprehensive operation on the first RSSI value, the second RSSI value and the third RSSI value to obtain actual parameters, and compares the actual parameters with calibration parameters to judge whether the mobile equipment is positioned in or out of the vehicle;
the step of establishing bluetooth connection between the first positioning module and the mobile device comprises the following steps:
the first positioning module in the vehicle periodically transmits Bluetooth broadcasting signals outwards;
the mobile device scans Bluetooth broadcast signals and establishes Bluetooth connection with the first positioning module;
the steps of detecting the RSSI value of the mobile device by the first positioning module, the second Bluetooth module and the third Bluetooth module respectively further comprise the following steps:
the first positioning module sends instructions to the second Bluetooth module and the third Bluetooth module in a CAN bus mode so that the second Bluetooth module and the third Bluetooth module respectively establish Bluetooth connection with the mobile equipment;
the calibration parameters in the step of acquiring the calibration parameters of the mobile equipment by the first positioning module are acquired through the following steps:
selecting a plurality of mobile devices with different models, and placing the selected mobile devices at different detection positions in the vehicle one by one;
detecting RSSI values of the mobile equipment by a first positioning module, a second Bluetooth module and a third Bluetooth module respectively;
respectively calculating RSSI average values of different detection positions of the first positioning module, the second Bluetooth module and the third Bluetooth module in the vehicle aiming at the mobile equipment of the same model; and
coding the RSSI average value, and adding an algorithm identifier and a CRC check bit on the code to generate a calibration parameter;
the first positioning module is arranged at the central position in the vehicle, the second Bluetooth module and the third Bluetooth module are symmetrically arranged at the left side and the right side of the vehicle body, and the first positioning module, the second Bluetooth module and the third Bluetooth module are positioned on the same straight line.
2. The calibration parameter-based bluetooth positioning method according to claim 1, wherein the mobile device comprises: smart phone, intelligent flat board, intelligent wrist-watch.
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