CN116074751A - Method, system, medium and equipment for judging turning of automobile digital key - Google Patents

Method, system, medium and equipment for judging turning of automobile digital key Download PDF

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Publication number
CN116074751A
CN116074751A CN202310094011.XA CN202310094011A CN116074751A CN 116074751 A CN116074751 A CN 116074751A CN 202310094011 A CN202310094011 A CN 202310094011A CN 116074751 A CN116074751 A CN 116074751A
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CN
China
Prior art keywords
rssi value
module
value
digital key
rssi
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Pending
Application number
CN202310094011.XA
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Chinese (zh)
Inventor
李子男
谭正
利文浩
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Shanghai Trustkernel Information Technology Co ltd
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Shanghai Trustkernel Information Technology Co ltd
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Priority to CN202310094011.XA priority Critical patent/CN116074751A/en
Publication of CN116074751A publication Critical patent/CN116074751A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
    • B60R25/20—Means to switch the anti-theft system on or off
    • B60R25/24—Means to switch the anti-theft system on or off using electronic identifiers containing a code not memorised by the user
    • 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
    • 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
    • H04W4/021—Services related to particular areas, e.g. point of interest [POI] services, venue services or geofences
    • 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
    • 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]
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Lock And Its Accessories (AREA)

Abstract

The invention provides a method, a system, a medium and equipment for judging turning of an automobile digital key, wherein the method comprises the following steps: step S1: recording an RSSI value N at a blocking distance without shielding; step S2: recording an RSSI value M at a locking distance turn; step S3: calculating a turn change RSSI value x=m-N; step S4: building a model K; step S5: w is adjusted according to the credibility of P, and P is selected to be just out of the car; step S6: and dynamically determining a falling lock value through a self-built model K. According to the invention, through a multi-dimensional fusion mode, the situation that the digital key is turned around in a specific area of the vehicle and is directly switched to another state is solved; the problem that unlocking and locking areas overlap after an automobile digital key turns around to shield an RSSI value at certain positions is solved; the difference of unlocking and locking distances under various postures is pulled up.

Description

Method, system, medium and equipment for judging turning of automobile digital key
Technical Field
The invention relates to the technical field of digital keys, in particular to a method, a system, a medium and equipment for judging turning of an automobile digital key.
Background
The distance between a Bluetooth signal receiving end (base station) and a Bluetooth signal transmitting end (signal source) is calculated based on a Bluetooth signal RSSI value of a Bluetooth RSSI ranging technology, so that coordinate calculation is performed, and a model d=10 ((ABS (RSSI) -A)/(10 x n)) commonly accepted in the industry is used for calculating the distance, wherein A represents the absolute value of RSSI when the base station is one meter away from the signal source, n is an environmental attenuation factor, typically, empirical values of 1-4 are adopted, and d represents the distance between the base station and the signal source.
The existing bluetooth RSSI positioning has the following problems: the indoor positioning technology based on the Bluetooth signal has the defects that the influence of environmental change on the Bluetooth RSSI value is large, the Bluetooth signal has certain jump, the fluctuation of the signal value can directly influence the calculated distance of the model, and the precision is poor.
An automatic door opening and closing lock technology. When the Bluetooth wireless equipment is in a certain range of the vehicle, the Bluetooth wireless equipment is paired with the vehicle-end wireless equipment, and safety communication is established. When the wireless device is close to the vehicle end and is in a safe range capable of opening the door, the vehicle end control system is expected to send an unlocking command, and the vehicle end control system opens the vehicle door lock according to the unlocking command. When the wireless equipment principle vehicle end is in a door closing range, the vehicle end control system sends a door closing command, and the vehicle end control system closes a vehicle door lock according to the door closing command.
Disclosed in patent document publication No. CN112406783a is an automobile digital key sharing system and method, the method comprising: the vehicle mobile terminal and intelligent equipment corresponding to the vehicle establish a communication channel through Bluetooth; a vehicle owner user logged in APP1 reads a digital key of the vehicle; the vehicle owner user sends an authorization request to the corresponding intelligent equipment user, wherein the authorization request carries a digital key; and the intelligent equipment user matches the received digital key with the digital key stored locally, if the matching is consistent, the intelligent equipment user is authorized, and if the matching is inconsistent, the intelligent terminal disconnects Bluetooth communication with the mobile terminal.
The Bluetooth signal has certain jump, and the fluctuation of the signal value can directly influence the calculated distance of the model; in the distance model, the artificial selection of n value often causes larger error, the magnitude of n value depends on the influence of environment on the signal, and an error n value can bring unexpected error; when calculating coordinates, a trilateration method and a least square method are generally adopted, and both methods have certain defects, the trilateration method cannot give a more accurate coordinate solution, the least square method becomes unsuitable under certain conditions, for example, when the deployment of a base station is sparse, a disease state matrix solution is generated in the calculation, and a larger error is generated in the calculation of the coordinates. Therefore, a technical solution is needed to improve the above technical problems.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a method, a system, a medium and equipment for judging turning of an automobile digital key.
The invention provides a method for judging turning of an automobile digital key, which comprises the following steps:
step S1: recording an RSSI value N at a blocking distance without shielding;
step S2: recording an RSSI value M at a locking distance turn;
step S3: calculating a turn change RSSI value x=m-N;
step S4: building a model K;
step S5: w is adjusted according to the credibility of P, and P is selected to be just out of the car;
step S6: and dynamically determining a falling lock value through a self-built model K.
Preferably, the RSSI value in the step S1 is converted into an absolute value, and the smaller the RSSI value is, the greater the intensity is; the greater the RSSI value, the less strength.
Preferably, in the step S4, the model K: the RSSI of the main module is greater than M-Z, Z is a turning factor, Z=w (N-P), w is a weight, and P is a dynamic factor.
The invention also provides a system for judging the turning of the automobile digital key, which comprises the following modules:
module M1: recording an RSSI value N at a blocking distance without shielding;
module M2: recording an RSSI value M at a locking distance turn;
module M3: calculating a turn change RSSI value x=m-N;
module M4: building a model K;
module M5: w is adjusted according to the credibility of P, and P is selected to be just out of the car;
module M6: and dynamically determining a falling lock value through a self-built model K.
Preferably, the RSSI value in the module M1 is converted into an absolute value, and the smaller the RSSI value, the greater the intensity; the greater the RSSI value, the less strength.
Preferably, in the module M4, the model K: the RSSI of the main module is greater than M-Z, Z is a turning factor, Z=w (N-P), w is a weight, and P is a dynamic factor.
The present invention also provides a computer-readable storage medium storing a computer program which, when executed by a processor, implements the steps of the above-described method for determining turning of a digital key for an automobile.
The invention also provides an electronic device, which comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the computer program is executed by the processor to realize the steps of the method for judging the turning of the automobile digital key.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, through changing the triggering condition of the vehicle lock, the situation that the digital key is turned in a specific area of the vehicle and is directly switched to another state is solved;
2. the invention solves the problem that unlocking and locking areas overlap after the automobile digital key turns around to shield the RSSI value at certain positions, and effectively solves the BUG of frequent unlocking and locking of the vehicle.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:
fig. 1 is a flow schematic of the present invention.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present invention.
Example 1:
the invention provides a method for judging turning of an automobile digital key, which comprises the following steps:
step S1: recording an RSSI value N at a blocking distance without shielding; the RSSI value is converted into an absolute value, and the smaller the RSSI value is, the larger the intensity is; the greater the RSSI value, the less strength.
Step S2: recording an RSSI value M at a locking distance turn;
step S3: calculating a turn change RSSI value x=m-N;
step S4: building a model K; in model K: the RSSI of the main module is greater than M-Z, Z is a turning factor, Z=w (N-P), w is a weight, and P is a dynamic factor.
Step S5: w is adjusted according to the credibility of P, and P is selected to be just out of the car;
step S6: and dynamically determining a falling lock value through a self-built model K.
The present invention also provides a computer-readable storage medium storing a computer program which, when executed by a processor, implements the steps of the above-described method for determining turning of a digital key for an automobile.
The invention also provides an electronic device, which comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the computer program is executed by the processor to realize the steps of the method for judging the turning of the automobile digital key.
The invention also provides a system for judging the turning of the automobile digital key, which can be realized by executing the flow steps of the method for judging the turning of the automobile digital key, namely, the method for judging the turning of the automobile digital key can be understood as a preferred implementation mode of the system for judging the turning of the automobile digital key by a person skilled in the art.
Example 2:
the invention also provides a system for judging the turning of the automobile digital key, which comprises the following modules:
module M1: recording an RSSI value N at a blocking distance without shielding; the RSSI value is converted into an absolute value, and the smaller the RSSI value is, the larger the intensity is; the greater the RSSI value, the less strength.
Module M2: recording an RSSI value M at a locking distance turn;
module M3: calculating a turn change RSSI value x=m-N;
module M4: building a model K; in model K: the RSSI of the main module is greater than M-Z, Z is a turning factor, Z=w (N-P), w is a weight, and P is a dynamic factor.
Module M5: w is adjusted according to the credibility of P, and P is selected to be just out of the car;
module M6: and dynamically determining a falling lock value through a self-built model K.
Example 3:
example 3 is a preferable example of example 1 to more specifically explain the present invention.
The invention aims at solving the problem that when the environmental conditions change, the vehicle frequently opens and closes due to different RSSI values caused by turning over in the same area.
The invention includes the discrimination of the turning state of the hand-held mobile phone; and (5) discriminating the condition of the unlocking triggering instruction of the vehicle.
The invention has the application scene that the digital car key is automatically unlocked when approaching the car within a certain range, and the car is automatically locked after being far away from the car and reaching a certain distance.
The system of the invention needs to be constructed by the following key realization:
slave module: the negative person receives the Bluetooth signal sent by the mobile phone and sends the RSSI value to the main module; mobile phone: is responsible for transmitting signals to the base station; and (3) main module: and the RSSI value sent by the base station is received, and a control instruction is sent to the vehicle through calculation.
The purpose of the design is to automatically unlock the vehicle when the hand-held mobile phone approaches the vehicle and reaches a certain range. When the vehicle is far away from the vehicle and reaches a certain distance, the vehicle can be automatically locked, and the situation of frequent unlocking and locking can not occur in the process of turning around to shield the mobile phone anyway.
The invention reduces the probability of frequent unlocking and locking phenomena by a turning judgment method during operation, and comprises the following steps:
step S1: the maximum/minimum RSSI value of the unlock region near the vehicle and the lock when far from the vehicle is recorded. Recording the maximum/minimum RSSI value N of unlocking and locking under the condition of turning shelter and non-shelter; for example, the minimum value n1= -80dBm of the RSSI is recorded at the boundary near the vehicle and reaching the unlock region, and the maximum value n2= -90dBm of the RSSI is recorded at the boundary far from the vehicle and reaching the lock region.
Step S2: and calculating the RSSI value variation X of the turning occlusion and the non-occlusion at the same position. For example, when the non-shielded RSSI value of the unlocking area is x1= -85dBm and the shielded RSSI value x2= -105dBm, the change amount at this time is x=x2-x1=20dbm.
Step S3: the triggering condition for unlocking and locking the vehicle is that the RSSI value must change more than x+n. According to the above data, the condition of unlocking the vehicle must be that the value of RSSI is greater than or equal to X+N2, namely-90+20= -70dBm, and the condition of locking must be that the value of RSSI is greater than or equal to X+N1, namely-80-20= -100dBm;
the change amount of the trigger condition of the vehicle unlocking and locking to the RSSI value is required to be larger than X+N, and frequent unlocking and locking of the vehicle caused by turning shielding can not occur.
The invention provides a system for judging turning of an automobile digital key, which comprises the following modules:
module M1: under the condition of turning shielding and non-shielding, respectively recording an unlocking area when approaching the vehicle and an RSSI value N locked when being away from the vehicle; the value N1 of the RSSI at the moment is recorded at the boundary which is close to the vehicle and reaches the unlocking area, and the value N2 of the RSSI at the moment is recorded at the boundary which is far away from the vehicle and reaches the locking area.
Module M2: calculating RSSI value change values X of turning shielding and non-shielding at the same position; the RSSI value which is not blocked in the unlocking area is X1, the blocked RSSI value is X2, and the change amount at the moment is X=X2-X1.
Module M3: the triggering condition of unlocking and locking of the vehicle is that the change of the RSSI value must be larger than X+N; the condition for unlocking the vehicle must be that the value of RSSI is equal to or greater than x+n2, and the condition for unlocking must be that the value of RSSI is equal to or greater than x+n1.
The system also comprises a slave module, an intelligent end and a master module, wherein the slave module receives Bluetooth signals sent by the intelligent end and sends RSSI values to the master module; the intelligent terminal sends a signal to the base station, and the intelligent terminal is a mobile phone; the main module receives the RSSI value sent by the base station and sends a control instruction to the vehicle through calculation.
The condition that the digital key turns around in a specific area of the vehicle is directly switched to another state is solved by changing the triggering condition of the vehicle locking; the invention solves the problem that unlocking and locking areas overlap after the automobile digital key turns around to shield the RSSI value at certain positions, and effectively solves the BUG of frequent unlocking and locking of the vehicle.
Those skilled in the art will appreciate that the invention provides a system and its individual devices, modules, units, etc. that can be implemented entirely by logic programming of method steps, in addition to being implemented as pure computer readable program code, in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers, etc. Therefore, the system and various devices, modules and units thereof provided by the invention can be regarded as a hardware component, and the devices, modules and units for realizing various functions included in the system can also be regarded as structures in the hardware component; means, modules, and units for implementing the various functions may also be considered as either software modules for implementing the methods or structures within hardware components.
The foregoing describes specific embodiments of the present invention. It is to be understood that the invention is not limited to the particular embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without affecting the spirit of the invention. The embodiments of the present application and features in the embodiments may be combined with each other arbitrarily without conflict.

Claims (8)

1. A method for determining turning of a digital key of an automobile, the method comprising the steps of:
step S1: recording an RSSI value N at a blocking distance without shielding;
step S2: recording an RSSI value M at a locking distance turn;
step S3: calculating a turn change RSSI value x=m-N;
step S4: building a model K;
step S5: w is adjusted according to the credibility of P, and P is selected to be just out of the car;
step S6: and dynamically determining a falling lock value through a self-built model K.
2. The method according to claim 1, wherein the RSSI value in the step S1 is converted into an absolute value, and the smaller the RSSI value, the greater the intensity; the greater the RSSI value, the less strength.
3. The method for determining turning of a digital key for an automobile according to claim 1, wherein in the step S4, the model K: the RSSI of the main module is greater than M-Z, Z is a turning factor, Z=w (N-P), w is a weight, and P is a dynamic factor.
4. A system for determining turning of a digital key of an automobile, the system comprising:
module M1: recording an RSSI value N at a blocking distance without shielding;
module M2: recording an RSSI value M at a locking distance turn;
module M3: calculating a turn change RSSI value x=m-N;
module M4: building a model K;
module M5: w is adjusted according to the credibility of P, and P is selected to be just out of the car;
module M6: and dynamically determining a falling lock value through a self-built model K.
5. The system according to claim 4, wherein the RSSI value in the module M1 is converted into an absolute value, and the smaller the RSSI value, the larger the intensity; the greater the RSSI value, the less strength.
6. The system according to claim 4, wherein, in the model K of the module M4: the RSSI of the main module is greater than M-Z, Z is a turning factor, Z=w (N-P), w is a weight, and P is a dynamic factor.
7. A computer-readable storage medium storing a computer program, wherein the computer program when executed by a processor implements the steps of the method for determining turning of a digital key for an automobile according to any one of claims 1 to 3.
8. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the computer program when executed by the processor implements the steps of the method for determining turning of a digital key for a car according to any one of claims 1 to 3.
CN202310094011.XA 2023-02-03 2023-02-03 Method, system, medium and equipment for judging turning of automobile digital key Pending CN116074751A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310094011.XA CN116074751A (en) 2023-02-03 2023-02-03 Method, system, medium and equipment for judging turning of automobile digital key

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310094011.XA CN116074751A (en) 2023-02-03 2023-02-03 Method, system, medium and equipment for judging turning of automobile digital key

Publications (1)

Publication Number Publication Date
CN116074751A true CN116074751A (en) 2023-05-05

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310094011.XA Pending CN116074751A (en) 2023-02-03 2023-02-03 Method, system, medium and equipment for judging turning of automobile digital key

Country Status (1)

Country Link
CN (1) CN116074751A (en)

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