CN111768526A - Bluetooth digital key positioning system for acquiring reference point data - Google Patents
Bluetooth digital key positioning system for acquiring reference point data Download PDFInfo
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- CN111768526A CN111768526A CN202010608192.XA CN202010608192A CN111768526A CN 111768526 A CN111768526 A CN 111768526A CN 202010608192 A CN202010608192 A CN 202010608192A CN 111768526 A CN111768526 A CN 111768526A
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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
The invention provides a Bluetooth digital key positioning system for obtaining reference point data, which comprises: when the Bluetooth digital key establishes connection with the vehicle-mounted Bluetooth module, acquiring the equipment ID of the Bluetooth digital key and sending the equipment ID to the vehicle-mounted Bluetooth module; the vehicle-mounted Bluetooth module is arranged in a vehicle, after connection with a Bluetooth digital key is established, reference point data for identifying the position of the Bluetooth digital key is obtained, and the reference point data, a corresponding device ID and the position of the Bluetooth digital key are subjected to associated block storage; and automatically calibrating and calibrating the position of the Bluetooth digital key according to the reference point data acquired at different positions corresponding to the equipment ID. The system can automatically adapt to the individual difference between different batches of Bluetooth modules on a specific vehicle and the individual difference between different types and batches of Bluetooth modules on the Bluetooth digital key, and can also automatically adapt to the difference caused by different mounting positions of the vehicle-mounted Bluetooth modules on different vehicles.
Description
Technical Field
The invention belongs to the technical field of Internet of vehicles, and particularly relates to a Bluetooth digital key positioning system for acquiring reference point data.
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 (which may be a RSSI threshold value common to all bluetooth digital key models for a specific vehicle type or a RSSI threshold value corresponding to a specific bluetooth digital key model for a specific vehicle type) calibrated by the bluetooth digital key positioning system at a research and development stage, so as to obtain a judgment result that the bluetooth digital key is located at a certain position inside or outside the vehicle.
However, for the bluetooth RSSI threshold obtained by the bluetooth digital key positioning system in the research and development stage, the difference between the installation positions of the vehicle-mounted bluetooth master module and the vehicle-mounted bluetooth slave module in each vehicle in the same vehicle type, the difference between the bluetooth signal strengths possibly caused by different batches of the bluetooth modules, and the difference between the bluetooth signal strengths possibly caused by different batches of the bluetooth modules in the same bluetooth digital key model both result in the bluetooth signal strength threshold calibrated by the bluetooth digital key in the research and development stage, which is different from the RSSI threshold of the actual position outside the vehicle on the real vehicle produced in the factory, thereby resulting in the larger difference between the positioning calculation result of the bluetooth digital key and the actual position. Meanwhile, when the bluetooth digital key positioning system is calibrated in the research and development stage, due to the consideration of cost, the calibration can only be performed on 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 to be calibrated, 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 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 the Bluetooth digital key positioning system for acquiring the reference point data, which can automatically adapt to the individual difference between different batches of Bluetooth modules on specific vehicles and the individual difference between the Bluetooth modules of the Bluetooth digital keys of different types and batches, and can also automatically make up the difference of Bluetooth signal intensity measurement caused by different vehicle-mounted Bluetooth module installation positions on different vehicles.
A bluetooth digital key location system that obtains reference point data, comprising:
a Bluetooth digital key; the device ID of the Bluetooth digital key is acquired when the connection with the vehicle-mounted Bluetooth module is established, and the device ID is sent to the vehicle-mounted Bluetooth module;
at least one vehicle-mounted Bluetooth module installed in the vehicle: the vehicle-mounted Bluetooth module is used for acquiring reference point data for identifying the position of the Bluetooth digital key after establishing connection with the Bluetooth digital key, associating the reference point data, the corresponding equipment ID and the position of the Bluetooth digital key, and storing the reference point data, the corresponding equipment ID and the position of the Bluetooth digital key in a database in a blocking manner; and the vehicle-mounted Bluetooth module is also used for automatically calibrating and calibrating the position of the Bluetooth digital key corresponding to the equipment ID according to the reference point data corresponding to the equipment ID.
Preferably, the vehicle-mounted bluetooth module is specifically configured to, after establishing connection with a bluetooth digital key, acquire the reference point data when detecting that the vehicle is in a preset vehicle state; 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.
Preferably, a bluetooth module is arranged in the bluetooth digital key; the Bluetooth digital key is specifically 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;
the reference point data comprises that the vehicle-mounted Bluetooth module measures the intensity of a received Bluetooth signal sent by a Bluetooth module in the Bluetooth digital key; or the Bluetooth signal strength is uploaded to the vehicle-mounted Bluetooth module by the Bluetooth digital key, and the received Bluetooth signal strength sent by the vehicle-mounted Bluetooth module is measured by the Bluetooth module in the Bluetooth digital key.
Preferably, the bluetooth digital key location system further comprises:
digital key management platform: the system is used for storing calibration and calibration signals uploaded by the vehicle-mounted Bluetooth module;
the vehicle-mounted Bluetooth module is also used for storing and uploading the 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 reference point data of the acquired bluetooth digital key.
Preferably, the bluetooth digital key is further configured to obtain a model of the bluetooth digital key when the bluetooth module establishes connection with the vehicle-mounted bluetooth module, and send the model to the vehicle-mounted bluetooth module.
Preferably, the vehicle-mounted bluetooth module is specifically configured to, when acquiring a calibration and calibration signal of the bluetooth digital key, associate the calibration and calibration signal with the model of the bluetooth digital key, store the associated calibration and calibration signal and the model of the bluetooth digital key, and send the stored calibration and calibration signal and the model of the bluetooth digital key to the digital key management platform;
the digital key management platform is specifically used for 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.
According to the technical scheme, the Bluetooth digital key positioning system provided by the invention has the advantages that the Bluetooth digital key sends the equipment ID of the Bluetooth digital key to the vehicle-mounted Bluetooth module each time the Bluetooth module establishes Bluetooth connection with the vehicle-mounted Bluetooth module, and the vehicle-mounted Bluetooth module carries out classified storage according to the corresponding equipment ID and the vehicle state (namely the position of the Bluetooth digital key) when receiving the reference point data. Therefore, in the subsequent use process of the system, the positions of the Bluetooth digital keys are automatically calibrated and calibrated according to the reference point data collected from different positions of each Bluetooth digital key, so that the system can be automatically adapted to the individual difference between different batches of Bluetooth modules on specific vehicles and the individual difference between triggered Bluetooth modules of different types and batches, and can also automatically make up the difference of Bluetooth signal intensity measurement caused by different vehicle-mounted Bluetooth module installation positions on different vehicles.
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 block diagram of a bluetooth digital key location system according to a third embodiment of the present invention.
Fig. 3 is a flowchart of a bluetooth digital key positioning system according to a fourth embodiment of the present invention.
Fig. 4 is a schematic diagram of data transmission in a bluetooth digital key positioning system according to a fourth embodiment of the present invention.
Fig. 5 is a system architecture according to a fifth embodiment of the present invention.
Fig. 6 is another system architecture according to a sixth 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 for obtaining reference point data, see fig. 1, comprising:
a Bluetooth digital key; the Bluetooth digital key is used for acquiring the equipment ID of the Bluetooth digital key when establishing connection with the vehicle-mounted Bluetooth module and sending the equipment ID to 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.
At least one vehicle-mounted Bluetooth module installed in the vehicle: the vehicle-mounted Bluetooth module is used for acquiring reference point data for identifying the position of the Bluetooth digital key after establishing connection with the Bluetooth digital key, associating the reference point data, the corresponding equipment ID and the vehicle state (namely the position of the Bluetooth digital key), and storing the reference point data, the corresponding equipment ID and the vehicle state in blocks in a database mode; and the vehicle-mounted Bluetooth module is also used for automatically calibrating and calibrating the position of the Bluetooth digital key corresponding to the equipment ID according to the reference point data of the vehicle state corresponding to the equipment ID.
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.
When the Bluetooth digital key establishes Bluetooth connection between the Bluetooth module and the vehicle-mounted Bluetooth module each time, the device ID (such as a device serial number or other unique identification numbers which can be distinguished from other Bluetooth digital keys) of the Bluetooth digital key is sent to the vehicle-mounted Bluetooth module, and the vehicle-mounted Bluetooth module performs classified storage according to the corresponding device ID and the current vehicle state when receiving reference point data. Therefore, in the subsequent use process of the system, the positions of the Bluetooth digital keys can be automatically calibrated according to the reference point data of different positions of each Bluetooth digital key. For example, when the bluetooth digital key a is used for the first time, since the vehicle-mounted bluetooth module does not locally store reference point data corresponding to the bluetooth digital key a, the bluetooth digital key a can only use a default RSSI threshold value for positioning calculation when being used for positioning, and the positioning accuracy is poor. However, in the first use process of the bluetooth digital key a, the vehicle-mounted bluetooth module can acquire the RSSI threshold of the bluetooth digital key of the specific position reference point, and use the RSSI threshold in the subsequent calculation process of the real-time position of the bluetooth digital key. Along with the increase of the use times of the Bluetooth digital key A, the acquired reference point data is increased, the accuracy of the reference point data is also increased, the vehicle-mounted Bluetooth module can automatically calculate the RSSI threshold value required by the positioning of the Bluetooth digital key according to the acquired reference point data at the background, and the calibration and calibration accuracy of the position of the Bluetooth digital key is improved, so that the vehicle-mounted Bluetooth module realizes the positioning of the Bluetooth digital key according to the RSSI threshold value of the Bluetooth digital key at a specific position, and the calculation result is more accurate. Therefore, the user can not obviously feel the calibration and calibration process of the positioning of the Bluetooth digital key in the using process, but obviously feel that the positioning effect of the Bluetooth digital key is more and more accurate, and the experience of the user is improved. Because the calibration and calibration of the position of the Bluetooth digital key are a process which is continuously carried out for a long time along with the use of a user, even if the natural attenuation of the signal of the electronic equipment is caused along with the long-term use of the vehicle-mounted Bluetooth module or the Bluetooth module in the Bluetooth digital key, the system described by the invention can automatically adapt and make up the adverse effect of the signal attenuation on the positioning accuracy of the Bluetooth digital key.
The Bluetooth digital key positioning system can avoid the calibration process of the RSSI threshold value of the Bluetooth signal strength aiming at a plurality of Bluetooth digital key models, which is required to be carried out before the existing Bluetooth digital key leaves the factory. And after using to this bluetooth digital key positioning system, the new bluetooth digital key model that just appears in the market, also can carry out automatic calibration and calibration to new bluetooth digital key model through above-mentioned system, do not hinder user's normal use, just so can the individual difference between the bluetooth module of different models and the bluetooth digital key of batch on the concrete vehicle of automatic adaptation, also can compensate the difference of the bluetooth signal intensity measurement that brings because on-vehicle bluetooth module mounted position is different on the different vehicles automatically.
Example two:
in this embodiment, on the basis of the first embodiment, the following contents are added:
the vehicle-mounted Bluetooth module is specifically used for acquiring the reference point data when detecting that the vehicle is in a preset vehicle state after establishing connection with the Bluetooth digital key; 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 values measured by several key positioning points as a calibration signal and a calibration signal for 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.
A Bluetooth module is arranged in the Bluetooth digital key; the Bluetooth digital key is specifically 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;
the reference point data comprises a Bluetooth signal strength (RSSI value) value sent by a Bluetooth module in the received Bluetooth digital key measured by the vehicle-mounted Bluetooth module; 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.
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 two 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. The first method is applied to a vehicle-mounted bluetooth master module comprising a bluetooth master module arranged in a vehicle and a plurality of bluetooth slave modules communicating with the bluetooth master module, and 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 module.
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 is triggered, the RSSI value of the Bluetooth digital key measured by the vehicle-mounted Bluetooth module is represented by RSSI-MBT, the RSSI value measured by the Bluetooth digital key and transmitted to the vehicle-mounted Bluetooth module is represented by RSSI-Device, the values are recorded into a database table Buffer-Left corresponding to the Left door corresponding to the Bluetooth digital key by the vehicle-mounted Bluetooth module, and a data column Buffer-Left-RSSI-MBT or Buffer-Left-RSSI-Device of the database table Buffer-Left specifically exists. This database table may record the RSSI values the last N times. The vehicle-mounted Bluetooth module can process all data in the database table, and the processed data is used as calibration data or calibration data required by the Bluetooth digital key positioning and is used as an important threshold parameter to participate in positioning calculation in an algorithm for subsequently judging the position of the Bluetooth digital key by the Bluetooth digital key positioning system.
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.
When the vehicle-mounted Bluetooth module detects that the Right door of the vehicle is opened or the unlocking switch is triggered, the RSSI value of the Bluetooth digital key measured by the vehicle-mounted Bluetooth module is represented by RSSI-MBT, the RSSI value measured by the Bluetooth digital key and transmitted to the vehicle-mounted Bluetooth module is represented by RSSI-Device, the values are recorded into a database table Buffer-Right corresponding to the Right door of the Bluetooth digital key by the vehicle-mounted Bluetooth module, and a data column Buffer-Right-RSSI-MBT or Buffer-Right-RSSI-Device of the database table Buffer-Right specifically exists.
3. The tail gate is opened or the unlocking switch corresponding to the tail gate is triggered.
When the vehicle-mounted Bluetooth module detects that a Tail door of a vehicle is opened or an unlocking switch corresponding to the Tail door is triggered, the RSSI value of the Bluetooth digital key measured by the vehicle-mounted Bluetooth module is represented by RSSI-MBT, the RSSI value measured by the Bluetooth digital key and transmitted to the vehicle-mounted Bluetooth module is represented by RSSI-Device, the RSSI value is recorded into a database table Buffer-Tail corresponding to the Tail door corresponding to the Bluetooth digital key by the vehicle-mounted Bluetooth module, and a data column Buffer-Tail-RSSI-MBT or Buffer-Tail-RSSI-Device of the database table Buffer-Tail is specifically existed.
4. The ignition switch in the vehicle is pressed.
After a user gets on the vehicle, the vehicle-mounted Bluetooth module detects the moment that an ignition key is pressed down, the RSSI value of the Bluetooth digital key measured by the vehicle-mounted Bluetooth module is represented by RSSI-MBT, the RSSI value measured by the Bluetooth digital key and transmitted to the vehicle-mounted Bluetooth module is represented by RSSI-Device, the RSSI value is recorded into a database table Buffer-Driver corresponding to a driving position corresponding to the Bluetooth digital key by the vehicle-mounted Bluetooth module, and a data column Buffer-Driver-RSSI-MBT or Buffer-Driver-RSSI-Device of the database table Buffer-Driver specifically exists.
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 three:
example three on the basis of the above example, the following is added:
referring to fig. 2, the bluetooth digital key location system further includes:
digital key management platform: the system is used for storing calibration and calibration signals uploaded by the vehicle-mounted Bluetooth module;
the vehicle-mounted Bluetooth module is also used for storing and uploading the 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, 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 a method for positioning to-be-positioned information by reading default and universal calibration and calibration signals in the process of starting using the Bluetooth digital key, 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.
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 the above example, the following is added:
and the calibration and calibration signals in the vehicle-mounted Bluetooth module are obtained by calculating one or more reference point data of the acquired Bluetooth digital key.
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.
Referring to fig. 3, the bluetooth digital key is further configured to obtain a model of the bluetooth digital key when the bluetooth module establishes a connection with the vehicle-mounted bluetooth module, and send the model to the vehicle-mounted bluetooth module.
The vehicle-mounted Bluetooth module is specifically used for associating the calibration and calibration signal with the model of the Bluetooth digital key when acquiring the calibration and calibration signal 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 the digital key management platform;
the digital key management platform is specifically used for 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. Fig. 4 is a schematic diagram of data transmission in the bluetooth digital key positioning system according to this embodiment.
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.
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.
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.
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 five:
the embodiment provides a system architecture on the basis of the above embodiment.
Referring to fig. 5, the bluetooth module for vehicle includes:
a Bluetooth main module installed in the vehicle;
specifically, the bluetooth master module is in a broadcast mode, the bluetooth module of the bluetooth digital key scans bluetooth broadcast signals, actively establishes connection with the bluetooth master module and starts communication after finding the required bluetooth broadcast signals, and sends the device ID to the bluetooth master module. The Bluetooth main module measures the signal intensity of the Bluetooth module in the Bluetooth digital key simultaneously in the communication process, or measures the Bluetooth signal intensity of the Bluetooth main module communicated with the Bluetooth digital key in real time by the Bluetooth digital key, and transmits the measured RSSI value to the Bluetooth main module. And the Bluetooth master module classifies and stores the reference point data at different positions according to different device IDs.
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 six:
sixth embodiment on the basis of the above embodiments, another system architecture is provided.
Referring to fig. 6, 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, actively establishes connection with the bluetooth master module and starts communication after finding the required bluetooth broadcast signals, and sends the device ID 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 can be used for independently measuring the signal intensity of Bluetooth broadcast of the same Bluetooth digital key, and the Bluetooth master module collects RSSI values measured by each Bluetooth slave module in real time and stores the obtained reference point data in a classified manner according to the equipment ID and the position of the Bluetooth digital key.
The vehicle in fig. 6 is equipped with 3 bluetooth slave modules, which are numbered 1, 2 and 3 respectively, and are respectively installed 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 method of acquiring reference point data and the method of storing reference point data described in the second embodiment 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 (10)
1. A bluetooth digital key location system for obtaining reference point data, comprising:
a Bluetooth digital key; the device ID of the Bluetooth digital key is acquired when the connection with the vehicle-mounted Bluetooth module is established, and the device ID is sent to the vehicle-mounted Bluetooth module;
at least one vehicle-mounted Bluetooth module installed in the vehicle: the vehicle-mounted Bluetooth module is used for acquiring reference point data for identifying the position of the Bluetooth digital key after establishing connection with the Bluetooth digital key, associating the reference point data, the corresponding equipment ID and the position of the Bluetooth digital key, and storing the reference point data, the corresponding equipment ID and the position of the Bluetooth digital key in a database in a blocking manner; and the vehicle-mounted Bluetooth module is also used for automatically calibrating and calibrating the position of the Bluetooth digital key corresponding to the equipment ID according to the reference point data corresponding to the equipment ID.
2. The Bluetooth digital key location system for obtaining reference point data according to claim 1,
the vehicle-mounted Bluetooth module is specifically used for acquiring the reference point data when detecting that the vehicle is in a preset vehicle state after establishing connection with the Bluetooth digital key; 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.
3. The Bluetooth digital key location system for obtaining reference point data according to claim 2,
the vehicle state includes a door open, a door lock unlock switch triggered, or an ignition switch in the vehicle triggered.
4. The Bluetooth digital key location system for obtaining reference point data according to claim 3,
a Bluetooth module is arranged in the Bluetooth digital key; the Bluetooth digital key is specifically 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;
the reference point data comprises that the vehicle-mounted Bluetooth module measures the intensity of a received Bluetooth signal sent by a Bluetooth module in the Bluetooth digital key; or the Bluetooth signal strength is uploaded to the vehicle-mounted Bluetooth module by the Bluetooth digital key, and the received Bluetooth signal strength sent by the vehicle-mounted Bluetooth module is measured by the Bluetooth module in the Bluetooth digital key.
5. The bluetooth digital key location system for obtaining reference point data according to claim 1, further comprising:
digital key management platform: the system is used for storing calibration and calibration signals uploaded by the vehicle-mounted Bluetooth module;
the vehicle-mounted Bluetooth module is also used for storing and uploading the 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.
6. The Bluetooth digital key location system for obtaining reference point data according to claim 5,
and the calibration and calibration signals in the vehicle-mounted Bluetooth module are obtained by calculating one or more reference point data of the acquired Bluetooth digital key.
7. The Bluetooth digital key location system for obtaining reference point data according to claim 5,
the Bluetooth digital key is also used for acquiring the model of the Bluetooth digital key when the Bluetooth module is connected with the vehicle-mounted Bluetooth module, and sending the model to the vehicle-mounted Bluetooth module.
8. The Bluetooth digital key location system for obtaining reference point data according to claim 7,
the vehicle-mounted Bluetooth module is specifically used for associating the calibration and calibration signal with the model of the Bluetooth digital key when acquiring the calibration and calibration signal 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 the digital key management platform;
the digital key management platform is specifically used for 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.
9. The Bluetooth digital key location system for obtaining reference point data according to any one of claims 6 to 8,
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.
10. The system of any one of claims 1-3 or 5-8, wherein the vehicle-mounted 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.
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| CN202010608192.XA CN111768526A (en) | 2020-06-30 | 2020-06-30 | Bluetooth digital key positioning system for acquiring reference point data |
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| CN202010608192.XA CN111768526A (en) | 2020-06-30 | 2020-06-30 | Bluetooth digital key positioning system for acquiring reference point data |
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