CN111768528A - Bluetooth digital key positioning system based on calibration and calibration signal sharing and distribution - Google Patents
Bluetooth digital key positioning system based on calibration and calibration signal sharing and distribution Download PDFInfo
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- CN111768528A CN111768528A CN202010612058.7A CN202010612058A CN111768528A CN 111768528 A CN111768528 A CN 111768528A CN 202010612058 A CN202010612058 A CN 202010612058A CN 111768528 A CN111768528 A CN 111768528A
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C9/00309—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C9/00896—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys specially adapted for particular uses
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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
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
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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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Abstract
According to the Bluetooth digital key positioning system based on the calibration and calibration signal sharing and distribution, the Bluetooth digital key is in Bluetooth communication with the vehicle-mounted Bluetooth module; the digital key management platform stores calibration and calibration signals uploaded by the vehicle-mounted Bluetooth module; at least one vehicle-mounted Bluetooth module installed in the vehicle: the system comprises a digital key management platform, a Bluetooth module and a Bluetooth module, wherein the digital key management platform is used for storing and uploading acquired calibration and calibration signals of the Bluetooth digital key to the digital key management platform; when the information to be positioned of the Bluetooth digital key is received, when a calibration and calibration signal matched with the Bluetooth digital key exists locally, reading the local calibration and calibration signal to position the information to be positioned; and when the calibration and calibration signal matched with the Bluetooth digital key does not exist locally, reading the calibration and calibration signal matched with the Bluetooth digital key from the digital key management platform to position the information to be positioned. The system overcomes the defect that the traditional method needs to calibrate the mainstream Bluetooth digital key in the market in advance in the research and development stage.
Description
Technical Field
The invention belongs to the technical field of car networking, and particularly relates to a Bluetooth digital key positioning system based on calibration and calibration signal sharing and distribution.
Background
The Bluetooth digital key positioning system of the Internet of vehicles mainly comprises a T-Box (telematics BOX) with a low power consumption Bluetooth (BLE) function and a Bluetooth digital key with a BLE function. The Bluetooth digital key positioning system of the Internet of vehicles is mature day by day, and the popularization and utilization rate is gradually improved, so that the technology of replacing the conventional radio frequency key with the Bluetooth digital key in the future is a development trend of the digital key technology in the Internet of vehicles.
In the Bluetooth digital key positioning system of the Internet of vehicles, the position judgment of the Bluetooth digital key is important. For example, when the bluetooth digital key is determined to be located in the vehicle, the user is allowed to start the engine. When the Bluetooth digital key is judged to be positioned outside the automobile, only the user is allowed to open or close the automobile door, and the user is forbidden to start the engine. When the existing bluetooth digital key positioning system judges that the bluetooth digital key is located inside or outside the vehicle, the existing bluetooth digital key positioning system mainly uses a bluetooth signal Strength RSSI (received signal Strength indication) value sent by the bluetooth digital key and detected in real time by a bluetooth master module installed inside the vehicle and a plurality of bluetooth slave modules installed inside the vehicle, and performs complex calculation with a bluetooth RSSI threshold value (namely a calibration and calibration signal, which may be a common RSSI threshold value for all bluetooth digital key models of a specific vehicle type or a RSSI threshold value corresponding to a specific bluetooth digital key model of a specific vehicle type) calibrated by the bluetooth digital key positioning system in a research and development stage, and obtains a judgment result that the bluetooth digital key is located at a certain position inside or outside the vehicle by performing complex calculation through a certain or several algorithm models.
When the bluetooth digital key positioning system is calibrated in the research and development stage, due to the consideration of cost, the calibration can be performed only for the mainstream bluetooth digital key model in the market at that time, so that the non-mainstream bluetooth digital key model is not calibrated, and the bluetooth digital key model which is only appeared after the calibration is completed can also be missed for calibration, so that when the user uses the part of the bluetooth digital key which is not specially calibrated, the correct RSSI threshold value used in the positioning calculation of the bluetooth digital key by the bluetooth digital key positioning system by adopting a positioning algorithm is lost, and finally, the positioning result of the bluetooth digital key has a larger error with the real position.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a Bluetooth digital key positioning system based on calibration and calibration signal sharing and distribution, and overcomes the defect that the traditional method needs to calibrate the mainstream Bluetooth digital key in the market in advance in the research and development stage.
A Bluetooth digital key positioning system based on calibration and calibration signal sharing and distribution comprises:
bluetooth digital key: a Bluetooth module is arranged; the Bluetooth digital key is used for carrying out Bluetooth communication with the vehicle-mounted Bluetooth module after the Bluetooth module establishes Bluetooth connection with the vehicle-mounted Bluetooth module;
digital key management platform: the system is used for storing calibration and calibration signals uploaded by the vehicle-mounted Bluetooth module;
at least one vehicle-mounted Bluetooth module installed in the vehicle: the system comprises a digital key management platform, a Bluetooth module and a Bluetooth module, wherein the digital key management platform is used for storing and uploading acquired calibration and calibration signals of the Bluetooth digital key to the digital key management platform; the vehicle-mounted Bluetooth module is also used for reading a local calibration and calibration signal to position the information to be positioned when the information to be positioned of the Bluetooth digital key is received and the local calibration and calibration signal matched with the Bluetooth digital key exists locally; and when the calibration and calibration signal matched with the Bluetooth digital key does not exist locally, reading the calibration and calibration signal matched with the Bluetooth digital key from the digital key management platform to position the information to be positioned.
Preferably, the calibration and calibration signals in the vehicle-mounted bluetooth module are calculated from one or more of the acquired bluetooth digital keys and reference point data for identifying the positions of the bluetooth digital keys.
Preferably, the first and second electrodes are formed of a metal,
the reference point data comprises one or a combination of the following data:
the vehicle-mounted Bluetooth module measures the intensity of a received Bluetooth signal sent by a Bluetooth module in the Bluetooth digital key;
the Bluetooth signal strength transmitted by the vehicle-mounted Bluetooth module is measured by the Bluetooth module in the Bluetooth digital key;
and measuring an azimuth angle obtained by a Bluetooth signal in the Bluetooth digital key by an antenna array arranged on the vehicle-mounted Bluetooth module.
Preferably, the bluetooth digital key is specifically configured to:
when the Bluetooth module is connected with the vehicle-mounted Bluetooth module, the model of the Bluetooth digital key is obtained, and the model is sent to the vehicle-mounted Bluetooth module.
Preferably, the vehicle-mounted bluetooth module is specifically configured to:
when the calibration and calibration signal of the Bluetooth digital key is acquired, associating the calibration and calibration signal with the model of the Bluetooth digital key, storing the associated calibration and calibration signal and the model of the Bluetooth digital key, and sending the stored calibration and calibration signal and the model of the Bluetooth digital key to a digital key management platform;
the digital key management platform is specifically configured to:
and reading the associated calibration and calibration signals according to the model of the Bluetooth digital key, and returning the signals to the vehicle-mounted Bluetooth module.
Preferably, the vehicle-mounted bluetooth module is specifically configured to:
when the calibration and calibration signal matched with the Bluetooth digital key does not exist locally, reading the calibration and calibration signal matched with the Bluetooth digital key from the digital key management platform;
if the data returned by the digital key management platform is not null, positioning the information to be positioned according to the calibration and calibration signals returned by the digital key management platform;
and if the data returned by the digital key management platform is null or the data is missing, adopting one or more default reference point data of the Bluetooth digital key, calculating a calibration and calibration signal according to the reference point data, and positioning the information to be positioned by utilizing the calibration and calibration signal.
Preferably, the vehicle-mounted bluetooth module includes:
a Bluetooth main module installed in the vehicle;
alternatively, one bluetooth master module is installed in the vehicle and a plurality of bluetooth slave modules are installed at different locations in the vehicle to communicate with the bluetooth master module.
Preferably, the vehicle-mounted bluetooth module is specifically configured to:
after the connection with the Bluetooth digital key is established, when the vehicle is detected to be in a preset vehicle state, acquiring the reference point data; the vehicle state identification Bluetooth digital key is positioned at the position of the vehicle body of the vehicle; the bluetooth digital key position is the vehicle state.
Preferably, the vehicle state includes a door open, a door lock unlock switch triggered, or an ignition switch in the vehicle triggered.
According to the technical scheme, the Bluetooth digital key positioning system based on the sharing and distribution of the calibration and calibration signals collects the calibration and calibration signals of various Bluetooth digital keys uploaded by the vehicle-mounted Bluetooth module by using the data management function of the digital key management platform. Therefore, when the Bluetooth digital key is used for the first time, whether matched calibration and calibration signals exist locally or not is searched, if the matched calibration and calibration signals exist, the vehicle is indicated to have used or stored the calibration and calibration signals matched with the Bluetooth digital key before, and the local calibration and calibration signals are used for positioning the information to be positioned. And if no data exists locally, reading a calibration and calibration signal matched with the Bluetooth digital key in the digital key management platform, and positioning the information to be positioned by using the calibration and calibration signal. Because the read calibration and calibration signals are matched with the Bluetooth digital key, compared with the prior art that default and universal calibration and calibration signals are read to position information to be positioned when the Bluetooth digital key is used, the system has higher accuracy and overcomes the defect that the traditional method needs to calibrate the mainstream Bluetooth digital key in the market in advance in the research and development stage. Therefore, when the Bluetooth digital key is just used, the accuracy of calibration and calibration signals is improved, and the positioning effect of the Bluetooth digital key is improved, so that the functions of using the Bluetooth digital key positioning system for judging the calibration of the position of the digital key and sharing the calibration signals can be realized, and the Bluetooth digital key can also be applied to other similar scenes needing data sharing, such as processing scenes of data sharing of other types of digital keys.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 is a block diagram of a bluetooth digital key location system according to an embodiment of the present invention.
Fig. 2 is a flowchart of a bluetooth digital key positioning system according to a third embodiment of the present invention.
Fig. 3 is a schematic diagram of data transmission in a bluetooth digital key positioning system according to a fourth embodiment of the present invention.
Fig. 4 is a system architecture according to a sixth embodiment of the present invention.
Fig. 5 is another system architecture according to a seventh embodiment of the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby. It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
It will be understood that the terms "comprises" and/or "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 the specification of the present invention 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 this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
As used in this specification and the appended claims, the term "if" may be interpreted contextually as "when", "upon" or "in response to a determination" or "in response to a detection". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted contextually to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".
The first embodiment is as follows:
a bluetooth digital key location system based on calibration and calibration signal sharing and distribution, see fig. 1, comprising:
bluetooth digital key: a Bluetooth module is arranged; the Bluetooth digital key is used for carrying out Bluetooth communication with the vehicle-mounted Bluetooth module after the Bluetooth module establishes Bluetooth connection with the vehicle-mounted Bluetooth module;
specifically, the existing bluetooth digital key mainly comprises a mobile phone or a terminal device (e.g., a watch, a bracelet, etc.) having a BLE communication function and a matching APP (application program). The Bluetooth digital key has the function of measuring the Bluetooth BLE Signal Strength RSSI (received Signal Strength indicator) value sent by the Bluetooth module connected with the Bluetooth digital key.
Digital key management platform: the system is used for storing calibration and calibration signals uploaded by the vehicle-mounted Bluetooth module;
at least one vehicle-mounted Bluetooth module installed in the vehicle: the system comprises a digital key management platform, a Bluetooth module and a Bluetooth module, wherein the digital key management platform is used for storing and uploading acquired calibration and calibration signals of the Bluetooth digital key to the digital key management platform; the vehicle-mounted Bluetooth module is also used for reading a local calibration and calibration signal to position the information to be positioned when the information to be positioned of the Bluetooth digital key is received and the local calibration and calibration signal matched with the Bluetooth digital key exists locally; and when the calibration and calibration signal matched with the Bluetooth digital key does not exist locally, reading the calibration and calibration signal matched with the Bluetooth digital key from the digital key management platform to position the information to be positioned.
Specifically, the vehicle-mounted Bluetooth module has a Bluetooth Low Energy (BLE) communication function, and also has a function of measuring an RSSI value of a Bluetooth BLE signal strength transmitted by a Bluetooth module connected to the vehicle-mounted Bluetooth module, and a function of measuring an RSSI value of a Bluetooth BLE broadcast signal with a specific ID or a specific name.
If the vehicle-mounted Bluetooth module has wireless communication capability, the vehicle-mounted Bluetooth module can directly communicate with the digital key management platform; if the vehicle-mounted Bluetooth module does not have the wireless communication capability, the vehicle-mounted Bluetooth module can communicate with the digital key management platform by means of the wireless communication capability of the Bluetooth digital key or other intelligent equipment on the vehicle. Therefore, the embodiment only limits that the vehicle-mounted bluetooth module can communicate with the digital key management platform, and does not limit the specific (direct or indirect) communication form.
The Bluetooth digital key positioning system utilizes the data management function of the digital key management platform to gather calibration and calibration signals of various Bluetooth digital keys uploaded by the vehicle-mounted Bluetooth module. Therefore, when the Bluetooth digital key is used for the first time, whether matched calibration and calibration signals exist locally or not is searched, if the matched calibration and calibration signals exist, the vehicle is indicated to have used or stored the calibration and calibration signals matched with the Bluetooth digital key before, and the local calibration and calibration signals are used for positioning the information to be positioned. And if no data exists locally, reading a calibration and calibration signal matched with the Bluetooth digital key in the digital key management platform, and positioning the information to be positioned by using the calibration and calibration signal. Because the read calibration and calibration signals are matched with the Bluetooth digital key, compared with the prior art that default and universal calibration and calibration signals are read to position information to be positioned when the Bluetooth digital key is used, the system has higher accuracy and overcomes the defect that the traditional method needs to calibrate the mainstream Bluetooth digital key in the market in advance in the research and development stage. Therefore, when the Bluetooth digital key is just used, the accuracy of calibration and calibration signals is improved, and the positioning effect of the Bluetooth digital key is improved, so that the functions of using the Bluetooth digital key positioning system for judging the calibration of the position of the digital key and sharing the calibration signals can be realized, and the Bluetooth digital key can also be applied to other similar scenes needing data sharing, such as processing scenes of data sharing of other types of digital keys.
The system aims at new Bluetooth digital keys appearing in the market, only the first few users need to acquire calibration and calibration signals when using the Bluetooth digital keys for several times, and upload the calibration and calibration signals to a digital key management platform, and users who subsequently use the same type of Bluetooth digital keys only need to read local data or data of the digital key management platform by the vehicle-mounted Bluetooth module, so that the Bluetooth digital keys can be accurately positioned.
Example two:
the second embodiment is added with the following contents on the basis of other embodiments:
the calibration and calibration signals in the vehicle-mounted Bluetooth module are obtained by calculating one or more acquired Bluetooth digital keys and reference point data for identifying the positions of the Bluetooth digital keys.
Specifically, the system calculates calibration and calibration signals of the Bluetooth digital keys according to reference point data of different positions of each Bluetooth digital key during use. The calibration and calibration signals include values for different bluetooth digital key positions.
Preferably, the first and second electrodes are formed of a metal,
the reference point data comprises one or a combination of the following data:
the vehicle-mounted Bluetooth module measures the received Bluetooth signal strength (RSSI value) sent by the Bluetooth module in the Bluetooth digital key;
the received Bluetooth signal strength (RSSI value) sent by the vehicle-mounted Bluetooth module is measured by the Bluetooth module in the Bluetooth digital key;
and measuring an azimuth angle obtained by a Bluetooth signal in the Bluetooth digital key by an antenna array arranged on the vehicle-mounted Bluetooth module.
Specifically, the vehicle-mounted Bluetooth module can acquire reference point data by acquiring the reference point data 1-10 times per second, so that the real-time performance of a measurement result is guaranteed. There are three types of reference point data sources in the system: 1. the vehicle-mounted Bluetooth module directly measures the Bluetooth signal intensity of the Bluetooth module in the Bluetooth digital key connected with the vehicle-mounted Bluetooth module. 2. And after the Bluetooth signal intensity of the vehicle-mounted Bluetooth digital key module is obtained through measurement, the vehicle-mounted Bluetooth digital key module uploads the measured signal intensity to the vehicle-mounted Bluetooth module to obtain the vehicle-mounted Bluetooth signal intensity. 3. And measuring the azimuth angle of the Bluetooth signal in the Bluetooth digital key by an antenna array arranged on the vehicle-mounted Bluetooth module. The Antenna Array (Antenna) has an auxiliary direction-finding function and is matched with an Antenna selector switch. The vehicle-mounted Bluetooth module controls the antenna selector switch of the antenna array to be switched in real time, and measures the azimuth angle, namely AoA, of the Bluetooth signal in the Bluetooth digital key according to a triangulation algorithm, so that the accurate position of the Bluetooth digital key is determined. The azimuth angle includes an azimuth angle in the same horizontal plane and an angle in a longitudinal plane perpendicular to the horizontal plane. Thus, the spatial position of the Bluetooth digital key can be determined by combining the measured Bluetooth signal strength and the measured azimuth angle. The first method is applied to a vehicle-mounted bluetooth module comprising a bluetooth master module and a plurality of bluetooth slave modules, wherein the bluetooth master module is arranged in a vehicle and communicates with the bluetooth slave modules, and the method comprises the steps of directly measuring the intensity of a bluetooth signal of a bluetooth module in a bluetooth digital key connected with the bluetooth master module by the bluetooth master module and measuring the intensity of a bluetooth signal broadcast by the bluetooth module in the bluetooth digital key by the bluetooth slave modules.
For the sake of brief description, the embodiments of the present invention do not refer to the corresponding contents in the foregoing embodiments of the present invention.
Example three:
example three on the basis of the above example, the following is added:
referring to fig. 2, the bluetooth digital key is specifically configured to:
when the Bluetooth module is connected with the vehicle-mounted Bluetooth module, the model of the Bluetooth digital key is obtained, and the model is sent to the vehicle-mounted Bluetooth module.
The vehicle-mounted Bluetooth module is specifically used for:
when the calibration and calibration signal of the Bluetooth digital key is acquired, associating the calibration and calibration signal with the model of the Bluetooth digital key, storing the associated calibration and calibration signal and the model of the Bluetooth digital key, and sending the stored calibration and calibration signal and the model of the Bluetooth digital key to a digital key management platform;
the digital key management platform is specifically configured to:
and reading the associated calibration and calibration signals according to the model of the Bluetooth digital key, and returning the signals to the vehicle-mounted Bluetooth module.
Specifically, in the use process of the Bluetooth digital key, the system automatically calibrates and calibrates the position of the Bluetooth digital key of a specific model according to reference point data acquired by the Bluetooth digital key of the specific model used by a user at different positions to obtain calibration and calibration information, so that the difference of the Bluetooth signal intensity measurement of the Bluetooth digital key of a specific model on a vehicle of a specific model can be automatically adapted. When the same model of Bluetooth digital key is used in the same model of vehicle, the difference of the Bluetooth signal intensity at each specific position of the vehicle is very small, and the consistency of the same type of Bluetooth digital key is good. Therefore, after the first user using the bluetooth digital key acquires enough calibration and calibration data, the calibration and calibration data corresponding to the bluetooth digital key is uploaded to the digital key management platform. After the digital key management platform redistributes the calibration and calibration data of the Bluetooth digital key to other vehicle-mounted Bluetooth modules, all the vehicle-mounted Bluetooth modules of the same type can use the calibration and calibration data to accurately position the same type of Bluetooth digital key, and therefore the use experience of most users is greatly improved. Therefore, the method of 'rear calibration' and sharing and distribution can overcome the defect that the traditional method needs to calibrate the mainstream Bluetooth digital keys in the market in advance in the research and development stage.
For the sake of brief description, the embodiments of the present invention do not refer to the corresponding contents in the foregoing embodiments of the present invention.
Example four:
example four on the basis of other examples, the following are added:
the vehicle-mounted Bluetooth module is specifically used for:
when the calibration and calibration signal matched with the Bluetooth digital key does not exist locally, reading the calibration and calibration signal matched with the Bluetooth digital key from the digital key management platform;
if the data returned by the digital key management platform is not null, positioning the information to be positioned according to the calibration and calibration signals returned by the digital key management platform;
and if the data returned by the digital key management platform is null or the data is missing, adopting one or more default reference point data of the Bluetooth digital key, calculating a calibration and calibration signal according to the reference point data, and positioning the information to be positioned by utilizing the calibration and calibration signal.
Specifically, if the vehicle-mounted bluetooth module and the digital key management platform do not have the calibration and calibration signal corresponding to the bluetooth digital key of the model, or the acquired calibration and calibration signal data is not complete, it is indicated that the bluetooth digital key is of a new model, or the previously acquired calibration and calibration signal data is incomplete, and the default calibration and calibration signal of the bluetooth digital key of the model is acquired.
Example five:
the vehicle-mounted Bluetooth module is specifically used for:
after the connection with the Bluetooth digital key is established, when the vehicle is detected to be in a preset vehicle state, acquiring the reference point data; the vehicle state identification Bluetooth digital key is positioned at the position of the vehicle body of the vehicle; the bluetooth digital key position is the vehicle state.
Specifically, the vehicle state identification bluetooth digital key is located at a vehicle body position of the vehicle, that is, the identification bluetooth digital key is located at a specific position of the vehicle, such as a driver position in the vehicle, or a left door, a right door, a tail door, and the like, and can be simply determined as inside the vehicle or outside the vehicle. The vehicle-mounted Bluetooth module collects the reference point data at the moment, so that the real position of the Bluetooth digital key relative to the vehicle can be more accurately reflected, and the accuracy of the Bluetooth digital key positioning system in the real-time positioning process of the Bluetooth digital key by using the reference point data in the follow-up process is improved.
The reference point data obtained in this embodiment is not only suitable for automatic calibration and calibration of the position of the bluetooth digital key, but also suitable for signal processing of other types of digital keys for position determination according to the RSSI value in wireless communication.
In the following, the collection of reference point data in several vehicle states is defined.
The system of the embodiment records the RSSI value and the azimuth angle measured by a plurality of key positioning points as a calibration signal and a calibration signal of the subsequent Bluetooth digital key position. The vehicle state includes the door being open, the door lock unlock switch (e.g., a mechanical switch or a touch switch mounted on the door or door handle) being triggered, or the ignition switch in the vehicle being depressed. For a conventional passenger vehicle, the doors include a left front door, a left rear door, a right front door, a right rear door, and a tailgate. For a two door vehicle, the doors include only the front left door, the front right door, and the rear door. For example, at the moment the left front door is opened, the user is considered to be outside the left front door with the bluetooth digital key; at the moment when the ignition switch in the vehicle is pressed, the user can be considered to be located in the driver seat in the vehicle with the bluetooth digital key. With reference to figure 3 of the drawings,
1. and the left front or rear door is opened, and the unlocking switch corresponding to the left front or rear door is triggered.
When the vehicle-mounted Bluetooth module detects that the Left door of the vehicle is opened or the unlocking switch corresponding to the Left door is triggered, the RSSI value and the azimuth angle of the Bluetooth digital key measured by the vehicle-mounted Bluetooth module are recorded into a database table Buffer-Left at the Left door corresponding to the type of the Bluetooth digital key. The RSSI and azimuth of the last N times may be recorded in this database table, and beyond N times, the data of the earliest time will be discarded. The vehicle-mounted Bluetooth module can process all data in the database table according to a specific algorithm, and the RSSI and the azimuth angle of the processed left vehicle door are used as calibration and calibration signals of the left vehicle door.
If the data in the database table Buffer-Left just reaches N times due to the data record addition at this time, the data in the previous database table Buffer-Left is not acquired from the digital key management platform, but is accumulated through the records of the data. Therefore, the action of adding the data record triggers the vehicle-mounted Bluetooth module to upload the data in the database table Buffer-Left at the Left door to the digital key management platform. And after the digital key management platform receives N times of data in a Buffer-Left table of a calibration data base corresponding to the Bluetooth digital key model, carrying out comprehensive processing according to the existing calibration data at the Left vehicle door in the data base.
2. And the right front or right rear door is opened, and the unlocking switch corresponding to the right front or right rear door is triggered.
Similarly, when the vehicle-mounted Bluetooth module detects that the Right door of the vehicle is opened or the unlocking switch corresponding to the Right door is triggered, the RSSI value and the azimuth angle of the Bluetooth digital key measured by the vehicle-mounted Bluetooth module are recorded into the database table Buffer-Right at the Right door corresponding to the type of the Bluetooth digital key. The RSSI and azimuth of the last N times may be recorded in this database table, and beyond N times, the data of the earliest time will be discarded. The vehicle-mounted Bluetooth module can process all data in the database table according to a specific algorithm, and the processed RSSI and azimuth angle of the right vehicle door are used as calibration and calibration signals of the right vehicle door.
3. The tail gate is opened or the unlocking switch corresponding to the tail gate is triggered.
Similarly, when the vehicle-mounted Bluetooth module detects that the Tail door of the vehicle is opened or the unlocking switch corresponding to the Tail door is triggered, the RSSI value and the azimuth angle of the Bluetooth digital key measured by the vehicle-mounted Bluetooth module are recorded into the database table Buffer-Tail at the Tail door corresponding to the type of the Bluetooth digital key. The RSSI and azimuth of the last N times may be recorded in this database table, and beyond N times, the data of the earliest time will be discarded. The vehicle-mounted Bluetooth module can process all data in the database table according to a specific algorithm, and the processed RSSI and azimuth angle at the tail gate are used as calibration and calibration signals of the tail gate.
4. The ignition switch in the vehicle is pressed.
Similarly, when the vehicle-mounted Bluetooth module detects the moment that the ignition key is pressed, the RSSI value and the azimuth angle of the Bluetooth digital key measured by the vehicle-mounted Bluetooth module are recorded into the database table Buffer-Driver at the pressing position of the ignition switch corresponding to the type of the Bluetooth digital key. The RSSI and azimuth of the last N times may be recorded in this database table, and beyond N times, the data of the earliest time will be discarded. The vehicle-mounted Bluetooth module can process all data in the database table according to a specific algorithm, and the RSSI and the azimuth angle of the pressed part of the ignition switch after processing are used as calibration and calibration signals of the pressed part of the ignition switch.
For a brief description of the main process, details of a manner in which the vehicle-mounted bluetooth module acquires the vehicle state are not described in detail, for example, the vehicle-mounted bluetooth module may be connected to a CAN bus of the vehicle to acquire a trigger signal that a door is opened, or a door lock is unlocked, or an ignition switch is pressed in real time. For further details, which are not mentioned in the further embodiments, reference is made to the corresponding matters in the system embodiments described above.
Example six:
embodiment six on the basis of the above embodiments, a system architecture is provided.
The vehicle-mounted Bluetooth module comprises:
referring to fig. 4, a bluetooth main module installed in a vehicle;
specifically, the bluetooth master module is in a broadcast mode, the bluetooth module of the bluetooth digital key scans bluetooth broadcast signals, and after the required bluetooth broadcast signals are found, the bluetooth master module actively establishes connection with the bluetooth master module and starts communication, and the model of the bluetooth digital key is sent to the bluetooth master module. And the Bluetooth main module acquires the calibration and calibration signals of the Bluetooth digital key model in the communication process.
For the sake of brief description, the embodiments of the present invention do not refer to the corresponding contents in the foregoing embodiments of the present invention.
Example seven:
embodiment seven on the basis of the above embodiments, another system architecture is provided.
Referring to fig. 5, the bluetooth module for vehicle includes:
the Bluetooth communication system comprises a Bluetooth master module installed in a vehicle and one or more Bluetooth slave modules which are installed at different positions in the vehicle and communicate with the Bluetooth master module.
Specifically, the bluetooth master module is in a broadcast mode, the bluetooth module of the bluetooth digital key scans bluetooth broadcast signals, and after the required bluetooth broadcast signals are found, the bluetooth master module actively establishes connection with the bluetooth master module and starts communication, and sends the model to the bluetooth master module. After the communication between the Bluetooth digital key and the Bluetooth main module is established, the Bluetooth digital key sets the Bluetooth module to be in a broadcast mode at the same time. The Bluetooth master module controls the Bluetooth slave module in communication connection with the Bluetooth master module to scan the broadcast signal of the Bluetooth digital key and measure the signal strength of the Bluetooth broadcast. The number of bluetooth slave module is r (r > ═ 1, and typical deployment mode is 3 ~ 7), and the number of bluetooth slave module is more, and the reference point data that obtain are abundanter, and follow-up bluetooth digital key's location is just more accurate. Each bluetooth slave module may be configured to independently measure the signal strength of a bluetooth broadcast of the same bluetooth digital key.
The vehicle in fig. 5 is provided with 3 bluetooth slave modules, which are numbered 1, 2 and 3 respectively, and are respectively arranged at different positions on the vehicle body, such as the left side, the right side, the front side or the rear side of the vehicle.
When the aforementioned manner of acquiring the reference point data and the manner of storing the reference point data are applied to the system, it is assumed that the RSSI value of the bluetooth signal broadcast by the bluetooth digital key measured by the ith vehicle-mounted bluetooth slave module is represented by RSSI-i, for example, the RSSI value measured by the first vehicle-mounted bluetooth slave module is RSSI-1, the RSSI value measured by the second vehicle-mounted bluetooth slave module is RSSI-2, the RSSI value measured by the third vehicle-mounted bluetooth slave module is RSSI-3, and so on. Reference point data of the Bluetooth slave modules corresponding to the Left door position in the database maintained by the Bluetooth master module are recorded into data columns Buffer-Left-RSSI-1, Buffer-Left-RSSI-2 and Buffer-Left-RSSI-3 in the database table Buffer-Left, similarly, reference point data of the Bluetooth slave modules corresponding to the Right door position in the database are recorded into data columns Buffer-Right-RSSI-1, Buffer-Right-RSSI-2 and Buffer-Right-RSSI-3 in the database table Buffer-Right, reference point data of the Bluetooth slave modules corresponding to the Tail door position in the database are recorded into data columns Buffer-Tail-RSSI-1, Buffer-Tail-RSSI-2 and Buffer-Tail-RSSI-3 in the database table Buffer-Tail, reference point data of the Bluetooth slave module of the corresponding driving position in the database are recorded into data columns Buffer-Driver-RSSI-1, Buffer-Driver-RSSI-2 and Buffer-Driver-RSSI-3 in a database table Buffer-Driver.
For the sake of brief description, the embodiments of the present invention do not refer to the corresponding contents in the foregoing embodiments of the present invention.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (9)
1. A bluetooth digital key positioning system based on calibration and calibration signal sharing and distribution, comprising:
bluetooth digital key: a Bluetooth module is arranged; the Bluetooth digital key is used for carrying out Bluetooth communication with the vehicle-mounted Bluetooth module after the Bluetooth module establishes Bluetooth connection with the vehicle-mounted Bluetooth module;
digital key management platform: the system is used for storing calibration and calibration signals uploaded by the vehicle-mounted Bluetooth module;
at least one vehicle-mounted Bluetooth module installed in the vehicle: the system comprises a digital key management platform, a Bluetooth module and a Bluetooth module, wherein the digital key management platform is used for storing and uploading acquired calibration and calibration signals of the Bluetooth digital key to the digital key management platform; the vehicle-mounted Bluetooth module is also used for reading a local calibration and calibration signal to position the information to be positioned when the information to be positioned of the Bluetooth digital key is received and the local calibration and calibration signal matched with the Bluetooth digital key exists locally; and when the calibration and calibration signal matched with the Bluetooth digital key does not exist locally, reading the calibration and calibration signal matched with the Bluetooth digital key from the digital key management platform to position the information to be positioned.
2. The Bluetooth digital key location system based on calibration and calibration signal sharing distribution of claim 1,
the calibration and calibration signals in the vehicle-mounted Bluetooth module are obtained by calculating one or more acquired Bluetooth digital keys and reference point data for identifying the positions of the Bluetooth digital keys.
3. The Bluetooth digital key location system based on calibration and calibration signal sharing distribution of claim 2,
the reference point data comprises one or a combination of the following data:
the vehicle-mounted Bluetooth module measures the intensity of a received Bluetooth signal sent by a Bluetooth module in the Bluetooth digital key;
the Bluetooth signal strength transmitted by the vehicle-mounted Bluetooth module is measured by the Bluetooth module in the Bluetooth digital key;
and measuring an azimuth angle obtained by a Bluetooth signal in the Bluetooth digital key by an antenna array arranged on the vehicle-mounted Bluetooth module.
4. The Bluetooth digital key location system based on calibration and calibration signal sharing and distribution of claim 3,
the bluetooth digital key is specifically configured to:
when the Bluetooth module is connected with the vehicle-mounted Bluetooth module, the model of the Bluetooth digital key is obtained, and the model is sent to the vehicle-mounted Bluetooth module.
5. The Bluetooth digital key location system based on calibration and calibration signal sharing distribution of claim 4,
the vehicle-mounted Bluetooth module is specifically used for:
when the calibration and calibration signal of the Bluetooth digital key is acquired, associating the calibration and calibration signal with the model of the Bluetooth digital key, storing the associated calibration and calibration signal and the model of the Bluetooth digital key, and sending the stored calibration and calibration signal and the model of the Bluetooth digital key to a digital key management platform;
the digital key management platform is specifically configured to:
and reading the associated calibration and calibration signals according to the model of the Bluetooth digital key, and returning the signals to the vehicle-mounted Bluetooth module.
6. The bluetooth digital key location system based on calibration and distribution of calibration signals as claimed in any one of claims 1 to 5, wherein said vehicle-mounted bluetooth module is specifically configured to:
when the calibration and calibration signal matched with the Bluetooth digital key does not exist locally, reading the calibration and calibration signal matched with the Bluetooth digital key from the digital key management platform;
if the data returned by the digital key management platform is not null, positioning the information to be positioned according to the calibration and calibration signals returned by the digital key management platform;
and if the data returned by the digital key management platform is null or the data is missing, adopting one or more default reference point data of the Bluetooth digital key, calculating a calibration and calibration signal according to the reference point data, and positioning the information to be positioned by utilizing the calibration and calibration signal.
7. The bluetooth digital key location system based on calibration and calibration signal sharing and distribution as claimed in any one of claims 1-5, wherein said vehicle bluetooth module comprises:
a Bluetooth main module installed in the vehicle;
alternatively, one bluetooth master module is installed in the vehicle and a plurality of bluetooth slave modules are installed at different locations in the vehicle to communicate with the bluetooth master module.
8. The Bluetooth digital key location system based on calibration and calibration signal sharing distribution of claim 2,
the vehicle-mounted Bluetooth module is specifically used for:
after the connection with the Bluetooth digital key is established, when the vehicle is detected to be in a preset vehicle state, acquiring the reference point data; the vehicle state identification Bluetooth digital key is positioned at the position of the vehicle body of the vehicle; the bluetooth digital key position is the vehicle state.
9. The Bluetooth digital key location system based on calibration and calibration signal sharing distribution of claim 8,
the vehicle state includes a door open, a door lock unlock switch triggered, or an ignition switch in the vehicle triggered.
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