CN114944081B - Method and system for realizing intelligent bracelet digital key car searching based on UWB - Google Patents

Method and system for realizing intelligent bracelet digital key car searching based on UWB Download PDF

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Publication number
CN114944081B
CN114944081B CN202210620531.5A CN202210620531A CN114944081B CN 114944081 B CN114944081 B CN 114944081B CN 202210620531 A CN202210620531 A CN 202210620531A CN 114944081 B CN114944081 B CN 114944081B
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vehicle
intelligent bracelet
digital key
searching
position information
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CN114944081A (en
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王顺达
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Rivotek Technology Jiangsu Co Ltd
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Rivotek Technology Jiangsu Co Ltd
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/14—Traffic control systems for road vehicles indicating individual free spaces in parking areas
    • G08G1/141—Traffic control systems for road vehicles indicating individual free spaces in parking areas with means giving the indication of available parking spaces
    • G08G1/144—Traffic control systems for road vehicles indicating individual free spaces in parking areas with means giving the indication of available parking spaces on portable or mobile units, e.g. personal digital assistant [PDA]
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
    • G08B7/06—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
    • G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
    • 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]
    • H04W4/44—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for communication between vehicles and infrastructures, e.g. vehicle-to-cloud [V2C] or vehicle-to-home [V2H]
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup
    • 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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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Lock And Its Accessories (AREA)

Abstract

The invention discloses a method and a system for realizing intelligent bracelet digital key vehicle searching based on UWB, comprising a method for realizing intelligent bracelet digital key and a method for searching vehicle by intelligent bracelet, which solves the problems that the existing digital key has insufficient vehicle searching interaction for a vehicle terminal and is difficult to realize double interaction effect for a user and a vehicle terminal. The intelligent bracelet is matched with the target digital key, and intelligent car searching operation is completed through the intelligent bracelet after successful matching. According to the invention, the intelligent bracelet is used as the digital key, so that intelligent car searching operation can be finished, a car searching reminding mode is improved, different scenes are corresponding to different distances, car searching effect, efficiency and user experience are improved, further, the digital key is realized on the intelligent bracelet, more people can experience the convenient function, and meanwhile, the application range of the digital car key is supplemented in a bracelet form in a low-cost mode.

Description

Method and system for realizing intelligent bracelet digital key car searching based on UWB
Technical Field
The invention relates to the technical field of intelligent driving, in particular to a method and a system for realizing intelligent bracelet digital key car searching based on UWB.
Background
Ultra Wide Band (UWB) technology is a wireless carrier communication technology, which does not use a sinusoidal carrier, but uses non-sinusoidal narrow pulses of nanosecond level to transmit data, so that the spectrum occupied by the technology is Wide. The UWB technology has the advantages of low system complexity, low power spectrum density of the transmitted signal, insensitivity to channel fading, low interception capability, high positioning accuracy and the like, and is particularly suitable for high-speed wireless access in indoor and other dense multipath places. BLE is Bluetooth low energy (Bluetooth Low Energy, or Bluetooth LE, BLE, old trademark Bluetooth Smart), also known as Bluetooth low energy.
The digital key is changed into a car key through BLE (Bluetooth), NFC, UWB and other different communication technologies, intelligent terminal equipment such as a smart phone, an NFC smart card, a smart watch and a smart bracelet, so that the key-free access and starting, remote key authorization for other people, personalized car setting and other convenient functions are realized, safer key management and more comfortable and convenient car use experience are realized.
The larger the indoor parking lot is built at the present stage, the more the car owner finds the car after the large indoor parking lot parks, as if the car owner finds the car in a large maze, the problem that the car owner can find the car by using a car key, but can not find the car, and the car finding of the indoor parking lot is difficult is caused. The existing car searching scheme is as follows: the vehicle owner searches for the vehicle through the vehicle key. The car owner presses the car key, the car detects the car key and then whistles to respond, and the car owner searches the position of the car through the sound searching. However, in a large parking lot, the distance of a key sensor is limited, and vehicles cannot be connected normally, so that vehicle searching fails; meanwhile, the existing digital key has insufficient car searching interaction for a car machine end, and double interaction effects are difficult to achieve for a user and the car machine.
In order to overcome the defect of the interaction function of the vehicle and the machine, a method and a system for realizing intelligent bracelet digital key vehicle searching based on UWB are provided.
Disclosure of Invention
The present invention has been made in view of the above-described problems occurring in the conventional smart-driving digital key.
Therefore, one of the purposes of the invention is to provide a method for realizing intelligent bracelet digital key vehicle searching based on UWB, which uses the intelligent bracelet as a digital key, can complete intelligent vehicle searching operation, improves vehicle searching reminding mode, corresponds to different scenes according to different distances, improves vehicle searching effect and vehicle searching efficiency, and improves user experience.
In order to solve the technical problems, the invention provides the following technical scheme: the method comprises the steps of realizing an intelligent bracelet digital key method and a car searching method through the intelligent bracelet, specifically, pairing the intelligent bracelet and a target digital key, and completing intelligent car searching operation through the intelligent bracelet after successful pairing;
the method for realizing the intelligent bracelet digital key comprises the following steps:
when a user pairs a target digital key for the first time, the mobile phone end is connected to a server through a data link, and a Bluetooth link is established between the mobile phone end and the intelligent bracelet;
the server transmits related certificates to the mobile phone end and the vehicle phone end through a data link, and the mobile phone end transmits the related certificates to the intelligent bracelet through a Bluetooth link after the transmission is completed;
the intelligent bracelet establishes a trusted link with the vehicle machine side through a Bluetooth link by using the certificate;
after the intelligent bracelet and the vehicle terminal establish a trusted link, a digital key is generated by using related certificates and other necessary information and stored in a safety unit of the intelligent bracelet, and the digital key is cached in a server through a data network of the vehicle terminal or the mobile phone terminal;
the unlocking process of the digital key in the subsequent unlocking process of the intelligent bracelet is carried out according to the standard of the CCC3.0 protocol;
the car searching method through the intelligent bracelet comprises the following steps of:
after the vehicle terminal enters the vehicle searching system of the underground parking garage, the vehicle searching system of the underground parking garage acquires the parking position information of the vehicle terminal;
the intelligent bracelet generates a positioning tag through a UWB module in the process of searching vehicles by a user, and sends UWB pulse signals to a vehicle searching system of an underground parking lot;
determining intelligent bracelet position information according to the UWB pulse signals by the underground parking garage car searching system, and resolving the position distance from a car machine end according to the intelligent bracelet position information to obtain a real-time distance;
the intelligent bracelet sends out an instruction for controlling the vehicle-mounted terminal and a corresponding instruction for controlling the intelligent bracelet according to the real-time distance through connection with the Bluetooth link of the vehicle-mounted terminal;
the vehicle-mounted terminal receives the instruction sent by the intelligent bracelet through the Bluetooth link and completes corresponding control.
As a preferred embodiment of the present invention, wherein: the location information further includes first location information, second location information, and third location information; the first position information is that the distance between the intelligent bracelet and the vehicle-mounted end is smaller than 30 meters, and the intelligent bracelet starts the UWB module to accurately position;
the second position information is that the distance between the intelligent bracelet and the vehicle machine end is smaller than 10 meters, the intelligent bracelet starts the vehicle searching reminding unit, meanwhile, the vehicle machine end is powered on, and the vehicle controller ECU starts a vehicle lamp to carry out vehicle searching reminding;
the third position information is that the distance between the intelligent bracelet and the vehicle machine end is smaller than 3 meters, the intelligent bracelet closes the vehicle searching reminding unit and the UWB module, and meanwhile the vehicle machine end controls the vehicle door to unlock automatically through the vehicle controller ECU.
As a preferred embodiment of the present invention, wherein: the car searching reminding unit comprises a vibration signal, a sound buzzing signal and/or a screen flashing signal;
in the process of automatically unlocking the vehicle door, the vehicle machine end simultaneously controls the flashing of the steering lamp and the prompt of the loudspeaker through the ECU of the vehicle controller.
As a preferred embodiment of the present invention, wherein: the position information further comprises fourth position information, the fourth position information is that the distance between the intelligent bracelet and the vehicle machine end is larger than 30 meters, the intelligent bracelet receives the vehicle machine end position information through the mobile phone end, and the intelligent bracelet displays the position information on the display unit according to the vehicle machine end position information.
As a preferred embodiment of the present invention, wherein: the server transmits the related certificate, and further comprises processing of the related certificate as follows:
respectively sending a request for extracting the digital certificate, the identity information and the public key information to a server at a mobile terminal and a vehicle machine terminal;
and the digital key safety management platform checks the identity of the vehicle machine after receiving the digital certificate request, and issues a digital certificate after the checking is passed, so that the intelligent bracelet acquires the digital key.
An intelligent bracelet digital key car searching system based on UWB comprises:
the vehicle-mounted terminal is connected to the server through a data link and is used for establishing a trusted link with the intelligent bracelet;
the intelligent bracelet establishes a trusted link with the vehicle terminal through a Bluetooth link according to the related certificate, generates a digital key by utilizing the related certificate and other necessary information, stores the digital key in a security unit, and caches the digital key in a server through a data network of the vehicle terminal or the mobile phone terminal;
the server is used for transmitting related certificates with the mobile phone end and the vehicle phone end through a data link;
and the mobile phone end is connected to the server through a data link and establishes a Bluetooth link with the intelligent bracelet.
As a preferred embodiment of the present invention, wherein: the smart bracelet includes:
the MCU main control unit is used for operating intelligent bracelet hardware and realizing the operation of the intelligent bracelet digital key car searching method based on UWB;
a security unit for storing the generated digital key information;
the UWB module is used for accurately positioning the intelligent bracelet;
the Bluetooth unit is used for carrying out Bluetooth link connection with the vehicle terminal or the mobile phone terminal;
the vehicle searching reminding unit is used for carrying out vehicle searching reminding work;
and the display unit is used for displaying the position information received by the intelligent bracelet.
As a preferred embodiment of the present invention, wherein: the vehicle searching reminding unit comprises:
the distance measuring module is used for calculating and measuring the distance between the intelligent bracelet and the vehicle machine end;
the first judging module is used for judging whether the distance between the intelligent bracelet and the vehicle-mounted end is smaller than 30 meters or not;
the second judging module is used for judging whether the distance between the intelligent bracelet and the vehicle machine end is smaller than 10 meters or not;
the third judging module is used for judging whether the distance between the intelligent bracelet and the vehicle machine end is smaller than 3 meters;
and the response module is used for responding to the judgment passing result of the second judgment module and sending out a vibration signal, a sound buzzing signal or/and a screen flashing signal.
As a preferred embodiment of the present invention, wherein: the vehicle searching system of the underground parking garage comprises an ultra wideband UWB positioning module, wherein the UWB positioning module is arranged in the underground parking garage, and a UWB positioning tag is integrally arranged at the vehicle machine end.
The invention has the beneficial effects that: according to the invention, the intelligent bracelet is used as the digital key, so that intelligent car searching operation can be finished, a car searching reminding mode is improved, different scenes are corresponding to different distances, car searching effect, efficiency and user experience are improved, further, the digital key is realized on the intelligent bracelet, more people can experience the convenient function, and meanwhile, the application range of the digital car key is supplemented in a bracelet form in a low-cost mode.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:
FIG. 1 is a flow chart diagram of a method for realizing a smart bracelet digital key according to the present invention;
FIG. 2 is a flow chart of a method for searching vehicles by an intelligent bracelet according to the invention;
FIG. 3 is a schematic diagram of a modular architecture for implementing an intelligent bracelet digital key car-finding system of the present invention;
fig. 4 is a schematic diagram of a modular structure of the vehicle searching and reminding unit according to the present invention.
Reference numerals in the drawings: 10. a vehicle machine end; 20. a server; 30. an intelligent bracelet; 301. an MCU main control unit; 302. a security unit; 303. a UWB module; 304. a Bluetooth unit; 305. a vehicle searching reminding unit; 3051. a ranging module; 3052. a first judgment module; 3053. a second judging module; 3054. a third judging module; 3055. a response module; 306. and a display unit.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which are obtained by a person skilled in the art based on the described embodiments of the invention, fall within the scope of protection of the invention.
Referring to fig. 1 and fig. 2, in an embodiment of the present invention, a method for implementing intelligent bracelet digital key vehicle searching based on UWB is provided, which includes implementing an intelligent bracelet digital key vehicle searching method, specifically, pairing an intelligent bracelet 30 with a target digital key, and completing intelligent vehicle searching operation in the intelligent bracelet 30 after successful pairing;
the method for realizing the intelligent bracelet digital key is characterized in that when a user pairs a target digital key for the first time, a mobile phone end is connected to a server 20 through a data link, and a Bluetooth link is established between the mobile phone end and an intelligent bracelet 30; the server 20 transmits related certificates to the mobile phone end and the vehicle phone end 10 through data links, and after the transmission is finished, the mobile phone end transmits the related certificates to the intelligent bracelet 30 through a Bluetooth link; the intelligent bracelet 30 establishes a trusted link with the vehicle machine end 10 through a Bluetooth link by using a certificate; after the intelligent bracelet 30 and the vehicle terminal 10 establish a trusted link, a digital key is generated by using a related certificate and other necessary information and is stored in a safety unit 302 of the intelligent bracelet 30, and the digital key is cached in the server 20 through a data network of the vehicle terminal 10 or the mobile phone terminal; the unlocking process of the digital key in the subsequent unlocking process of the intelligent bracelet 30 is carried out according to the standard of the CCC3.0 protocol;
referring specifically to fig. 1, in actual operation, the method comprises the following steps:
s101, registering an APP by a vehicle owner;
s102, the server 20 and the vehicle terminal 10 establish a data link to transmit related certificates through the mobile phone and the intelligent bracelet 30;
s103, establishing a Bluetooth link between the mobile phone end and the intelligent bracelet 30;
s104, the server 20 generates a related certificate and sends the related certificate to the mobile phone end and the vehicle machine end 10;
s105, the mobile phone end sends the related certificate to the intelligent bracelet 30 through a Bluetooth link;
s106, the intelligent bracelet 30 and the vehicle machine side 10 establish a trusted Bluetooth link through a related certificate;
s107, after the two parties exchange necessary information, a digital key is generated in the intelligent bracelet 30 and stored in the security unit 302;
s108, in the subsequent unlocking process, the digital key of the intelligent bracelet 30 is carried out according to the CCC3.0 protocol;
s109, the server 20 generates a related certificate and transmits the same to the mobile phone and the vehicle 10.
Referring to fig. 2, specifically, the method for searching vehicles by using the smart bracelet according to the embodiment includes the following specific steps:
s201, after the realization of the intelligent bracelet 30 and the vehicle terminal 10 is completed, the vehicle enters an underground parking lot vehicle searching system with a UWB positioning base station;
s202, after the vehicle terminal 10 enters the underground parking lot vehicle searching system, the underground parking lot vehicle searching system acquires the parking position information of the vehicle terminal 10;
s203, the intelligent bracelet 30 generates a positioning tag through the UWB module 303 in the process of searching the vehicles by the user, and sends UWB pulse signals to the vehicle searching system of the underground parking garage;
s204, determining the position information of the intelligent bracelet 30 according to the UWB pulse signal by the underground parking garage car searching system, and resolving the position distance from the car machine end 10 according to the position information of the intelligent bracelet 30 to obtain a real-time distance;
s205, the intelligent bracelet 30 sends out an instruction for controlling the vehicle machine end 10 and a corresponding instruction for controlling the intelligent bracelet 30 according to the real-time distance through connection with a Bluetooth link of the vehicle machine end 10;
s206, the vehicle-mounted terminal 10 receives the instruction sent by the intelligent bracelet 30 through the Bluetooth link and completes corresponding control.
Based on the above-mentioned vehicle searching method, it is emphasized that the location information further includes first location information, second location information, and third location information; the first position information is that the distance between the intelligent bracelet 30 and the vehicle-mounted terminal 10 is smaller than 30 meters, and the intelligent bracelet 30 starts the UWB module 303 to accurately position;
the second position information is that the distance between the intelligent bracelet 30 and the vehicle machine end 10 is smaller than 10 meters, the intelligent bracelet 30 starts the vehicle searching reminding unit 305, meanwhile, the vehicle machine end 10 starts to be electrified, and the vehicle lamp is started through the vehicle controller ECU to carry out vehicle searching reminding;
the third position information is that the distance between the intelligent bracelet 30 and the vehicle machine end 10 is smaller than 3 meters, the intelligent bracelet 30 closes the vehicle searching reminding unit 305 and the UWB module 303, and meanwhile the vehicle machine end 10 controls the vehicle door to be automatically unlocked through the vehicle controller ECU.
The car-searching reminding unit 305 sends out a vibration signal, a sound buzzing signal or/and a screen flashing signal, so that a user and a car machine realize a double interaction effect; in the process of automatically unlocking the vehicle door, the vehicle machine end 10 simultaneously controls the flashing of the steering lamp and the horn prompt through the vehicle controller ECU.
Based on the above, the smart bracelet 30 according to the present invention can be known according to the description of the above scheme, and according to the corresponding distance, the vehicle-mounted terminal 10 enters the corresponding scene as follows:
1. within 30 meters, the scheme starts the UWB accurate positioning function;
2. setting a welcome area: less than 10 meters (configurable, without limitation, in this embodiment), the vehicle welcome function turns on the lights;
3. setting an unlocking zone: less than 3 meters (configurable, not limited in this embodiment), automatic unlocking, flashing with turn signal lights, horn prompting.
In this embodiment, the position information preferably further includes fourth position information, where the distance between the smart band 30 and the vehicle terminal 10 is greater than 30 meters, the smart band 30 receives the position information of the vehicle terminal 10 through the mobile phone terminal, and the smart band 30 displays the position information on the display unit 306 according to the position information of the vehicle terminal 10.
While the server 20 transmits the associated certificate, further including processing of the associated certificate as follows:
the mobile terminal and the vehicle terminal 10 respectively send a request for extracting the digital certificate, the identity information and the public key information to the server 20; the digital key security management platform examines the identity of the vehicle terminal 10 after receiving the digital certificate request, and issues the digital certificate after the examination is passed, so that the smart band 30 acquires the digital key.
Referring to fig. 3, the embodiment further provides a smart bracelet digital key car searching system based on UWB based on the above method, including:
the vehicle-mounted terminal 10 is connected to the server 20 through a data link and is used for establishing a trusted link with the intelligent bracelet 30;
the intelligent bracelet 30 establishes a trusted link with the vehicle-mounted terminal 10 through a Bluetooth link according to the related certificate, generates a digital key by utilizing the related certificate and other necessary information, stores the digital key in the safety unit 302, and caches the digital key in the server 20 through a data network of the vehicle-mounted terminal 10 or the mobile phone terminal;
the server 20 is configured to transmit related certificates with the mobile phone end and the vehicle phone end 10 through a data link;
the mobile phone end is connected to the server 20 through a data link and establishes a Bluetooth link with the intelligent bracelet 30;
the vehicle searching system of the underground parking garage comprises an ultra wideband UWB positioning module, wherein the UWB positioning module is arranged in the underground parking garage, and a UWB positioning tag is integrally arranged at a vehicle machine end 10.
The specific smart band 30 includes:
the MCU main control unit 301 is used for hardware operation of the intelligent bracelet 30 and operation of the intelligent bracelet 30 digital key car searching method based on UWB;
a security unit 302 for storing the generated digital key information;
the UWB module 303 is configured to accurately locate the smart band 30;
the bluetooth unit 304 is configured to perform bluetooth link connection with the vehicle terminal 10 or the mobile phone terminal;
a vehicle searching reminding unit 305, configured to perform a vehicle searching reminding task;
and a display unit 306, configured to display the position information received by the smart band 30.
Referring to fig. 4, the vehicle finding reminder unit 305 of the present embodiment includes:
the distance measuring module 3051 is used for calculating and measuring the distance between the intelligent bracelet 30 and the vehicle-mounted terminal 10;
the first judging module 3052 is configured to judge whether a distance between the smart band 30 and the vehicle-mounted terminal 10 is less than 30 meters;
the second judging module 3053 is configured to judge whether the distance between the smart band 30 and the vehicle-mounted terminal 10 is less than 10 meters;
the third judging module 3054 is configured to judge whether the distance between the smart band 30 and the vehicle-mounted terminal 10 is less than 3 meters;
the response module 3055 responds to the judgment passing result of the second judgment module 3053 to send out a vibration signal, a sound buzzing signal or/and a screen flashing signal.
In summary, the existing digital key has insufficient vehicle searching interaction for the vehicle machine end, is difficult to realize dual interaction effect for users and the vehicle machine, can finish intelligent vehicle searching operation by using the intelligent bracelet as the digital key, improves a vehicle searching reminding mode, and improves vehicle searching effect, efficiency and user experience according to different scenes corresponding to different distances, thereby realizing the digital key on the intelligent bracelet, enabling more people to experience the convenient function, and simultaneously supplementing the application range of the digital vehicle key in a bracelet form in a low-cost mode.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (4)

1. The method is characterized by comprising the steps of realizing the intelligent bracelet digital key searching method and the intelligent bracelet digital key searching method, specifically, pairing the intelligent bracelet (30) with a target digital key, and completing intelligent vehicle searching operation through the intelligent bracelet (30) after successful pairing;
the method for realizing the intelligent bracelet digital key comprises the following steps:
when a user pairs a target digital key for the first time, the mobile phone end is connected to a server (20) through a data link, and a Bluetooth link is established between the mobile phone end and an intelligent bracelet (30);
the server (20) transmits related certificates between the mobile phone end and the vehicle phone end (10) through a data link, and after the transmission is finished, the mobile phone end transmits the related certificates to the intelligent bracelet (30) through a Bluetooth link;
the intelligent bracelet (30) establishes a trusted link with the vehicle machine end (10) through a Bluetooth link by using a certificate;
after the intelligent bracelet (30) and the vehicle machine end (10) establish a trusted link, a digital key is generated by using related certificates and other necessary information and is stored in a safety unit (302) of the intelligent bracelet (30), and the digital key is cached in a server (20) through a data network of the vehicle machine end (10) or the mobile phone end;
the unlocking process of the digital key in the follow-up unlocking process of the intelligent bracelet (30) is carried out according to the standard of the CCC3.0 protocol;
the car searching method through the intelligent bracelet comprises the following steps of:
after the vehicle terminal (10) enters the vehicle searching system of the underground parking garage, the vehicle searching system of the underground parking garage acquires the parking position information of the vehicle terminal (10);
the intelligent bracelet (30) generates a positioning tag through the UWB module (303) in the process of searching the vehicles by the user, and sends UWB pulse signals to the vehicle searching system of the underground parking lot;
determining the position information of an intelligent bracelet (30) according to the UWB pulse signal by the underground parking lot car searching system, and calculating the position distance from a car machine end (10) according to the position information of the intelligent bracelet (30) to obtain a real-time distance;
the intelligent bracelet (30) sends out an instruction for controlling the vehicle-mounted terminal (10) and a corresponding instruction for controlling the intelligent bracelet (30) through connection with a Bluetooth link of the vehicle-mounted terminal (10) according to the real-time distance;
the vehicle-mounted terminal (10) receives an instruction sent by the intelligent bracelet (30) through a Bluetooth link and completes corresponding control; the real-time distance comprises first position information, second position information and third position information; the first position information is that the distance between the intelligent bracelet (30) and the vehicle-mounted terminal (10) is smaller than 30 meters, and the intelligent bracelet (30) starts the UWB module (303) to accurately position;
the second position information is that the distance between the intelligent bracelet (30) and the vehicle machine end (10) is smaller than 10 meters, the intelligent bracelet (30) starts the vehicle searching reminding unit (305), meanwhile, the vehicle machine end (10) starts to be electrified, and the vehicle lamp is started through the vehicle controller ECU to carry out vehicle searching reminding;
the third position information is that the distance between the intelligent bracelet (30) and the vehicle machine end (10) is smaller than 3 meters, the intelligent bracelet (30) closes the vehicle searching reminding unit (305) and the UWB module (303), and meanwhile the vehicle machine end (10)
Controlling the automatic unlocking of the vehicle door through a vehicle controller ECU;
the vehicle searching reminding unit (305) comprises a vibration signal, a sound buzzing signal or/and a screen flashing signal;
in the process of automatically unlocking the vehicle door, the vehicle machine end (10) controls the flashing of a steering lamp and the prompt of a loudspeaker through the ECU of the vehicle controller;
the position information also comprises fourth position information, the fourth position information is that the distance between the intelligent bracelet (30) and the vehicle machine end (10) is more than 30 meters, and the intelligent bracelet (30) receives the vehicle machine end (10) through the mobile phone end
The position information, and the intelligent bracelet (30) is arranged on the display unit (306) according to the position information of the vehicle machine end (10)
Displaying position information;
the server (20) transmits the associated certificate, further comprising processing the associated certificate as follows:
respectively sending a request for extracting the digital certificate, the identity information and the public key information to a server (20) at a mobile terminal and a vehicle machine terminal (10);
the digital key safety management platform checks the identity of the vehicle-mounted terminal (10) after receiving the digital certificate request, and issues a digital certificate after the checking is passed, so that the intelligent bracelet (30) acquires a digital key;
the vehicle searching system of the underground parking garage comprises an ultra wideband UWB positioning module, wherein the UWB positioning module is arranged in the underground parking garage, and a UWB positioning tag is integrally arranged at the vehicle machine end (10).
2. A system for implementing the intelligent bracelet digital key vehicle finding method based on UWB according to claim 1, comprising:
the vehicle-mounted terminal (10) is connected to the server (20) through a data link and is used for establishing a trusted link with the intelligent bracelet (30);
the intelligent bracelet (30) establishes a trusted link with the vehicle-mounted terminal (10) through a Bluetooth link according to the related certificate, generates a digital key by utilizing the related certificate and other necessary information, stores the digital key in the safety unit (302), and caches the digital key in the server (20) through a data network of the vehicle-mounted terminal (10) or a mobile phone terminal;
the server (20) is used for transmitting related certificates with the mobile phone end and the vehicle-mounted end (10) through a data link;
and the mobile phone end is connected to the server (20) through a data link and establishes a Bluetooth link with the intelligent bracelet (30).
3. The system of claim 2, wherein the smart band (30) comprises:
MCU master control unit (301) for smart band (30) hardware operation, and as described in claim 1
The method is based on UWB to realize the operation of the intelligent bracelet digital key car searching method;
a security unit (302) for storing the generated digital key information;
the UWB module (303) is used for accurately positioning the intelligent bracelet (30);
the Bluetooth unit (304) is used for carrying out Bluetooth link connection with the vehicle terminal (10) or the mobile phone terminal;
a vehicle searching reminding unit (305) for carrying out vehicle searching reminding work;
and the display unit (306) is used for displaying the position information received by the intelligent bracelet (30).
4. A system according to claim 3, wherein the car-seeking reminder unit (305) comprises:
the distance measuring module (3051) is used for calculating and measuring the distance between the intelligent bracelet (30) and the vehicle-mounted terminal (10);
the first judging module (3052) is used for judging whether the distance between the intelligent bracelet (30) and the vehicle-mounted terminal (10) is smaller than 30 meters or not;
the second judging module (3053) is used for judging whether the distance between the intelligent bracelet (30) and the vehicle-mounted terminal (10) is smaller than 10 meters or not;
the third judging module (3054) is used for judging whether the distance between the intelligent bracelet (30) and the vehicle-mounted terminal (10) is smaller than 3 meters or not;
and the response module (3055) is used for responding to the judgment passing result of the second judgment module (3053) and sending out a vibration signal, a sound buzzing signal or/and a screen flashing signal.
CN202210620531.5A 2022-06-02 2022-06-02 Method and system for realizing intelligent bracelet digital key car searching based on UWB Active CN114944081B (en)

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