CN115713823A

CN115713823A - Intelligent automobile key based on gyroscope, pedometer and UWB

Info

Publication number: CN115713823A
Application number: CN202211430641.1A
Authority: CN
Inventors: 冯磊
Original assignee: Xi'an Moli Technology Co ltd
Current assignee: Xi'an Moli Technology Co ltd
Priority date: 2022-11-15
Filing date: 2022-11-15
Publication date: 2023-02-24

Abstract

The invention relates to an intelligent automobile key based on a gyroscope, a pedometer and a UWB (ultra Wide band), which comprises a key body, a control module and an execution module, wherein the key body, the control module and the execution module are in communication connection; the key body is internally provided with an angular speed sensing module, a step counting module, a display module, a UWB module, a wireless cellular network module, a Bluetooth module and a wireless transceiving module; the control module is internally provided with a control chip for providing control for the key body so as to enable the execution module to execute operation. According to the intelligent automobile key based on the gyroscope, the pedometer and the UWB, under the condition that the background of a cellular network is absent and the distance from a vehicle is far, the vehicle is searched by utilizing the angular speed sensing module, the step counting module and the UWB module, a user can conveniently search the vehicle on the sea or in a desert or a deep well, the problem that the user is difficult to find the vehicle in a long distance can be solved, and under the condition that the cellular network is present and the cellular network is absent, the two technologies are combined, so that the purpose of finding the vehicle without sight distance and obstacles can be achieved.

Description

Intelligent automobile key based on gyroscope, pedometer and UWB

Technical Field

The invention relates to the technical field of intelligent automobile keys, in particular to an intelligent automobile key based on a gyroscope, a pedometer and a UWB.

Background

The mechanical key is the most common car key, the door lock matched with the mechanical key is generally almost the same as the door lock in a home, and can be opened or locked only by being inserted into a key hole and rotating, the defect is that a car cannot be started remotely, and some specific scenes cannot be met.

The existing mature technical digital key has three technical routes of an NFC key, a BLE key and a UWB key, and the NFC key is stuck to a vehicle sensor for 1-2 cm distance and can be sensed by swiping a card so as to unlock the vehicle;

BLE key: the experience is similar to that of PEPS, and the difference from PEPS is that the mobile phone is changed into an automobile virtual key through Bluetooth to replace an entity intelligent key;

UWB key: within the range of 20 meters, a Bluetooth scanning mobile phone can be used for carrying out Bluetooth connection, identity authentication and Bluetooth rough distance measurement; the positioning and ranging functions of the UWB anchor point can be started within the range of 10-20 meters; a welcome area is set within the range of 3-10 meters, and a vehicle can be triggered to carry out the vehicle light opening or the horn prompting of the welcome function, so that a vehicle owner can find the vehicle conveniently; when the vehicle travels to a distance of 6 meters away from the vehicle, the lighting in the vehicle is automatically turned on; when the automobile walks to the range of 1-3 m, an unlocking area can be set, the automobile door can be automatically unlocked, the height of the seat can be automatically adjusted, and the rearview mirror can be folded and automatically opened; when a vehicle owner enters the vehicle and the UWB anchor point in the vehicle scans a UWB signal of the mobile phone, the start of the vehicle can be realized by pressing a start key;

NFC + BLE key: the vehicle-mounted electronic equipment comprises 1 PEPS controller, 1 NFC card reader, N Bluetooth antennas and 1 NFC card vehicle key, and NFC unlocking can normally operate under the condition that a mobile phone is powered off, so that the unlocking requirement of the Bluetooth key under a special emergency scene when the mobile phone is powered off can be made up, so that a BLE key is daily used by a vehicle owner in an NFC + BLE scheme, and a common NFC key can be used as a device of the Bluetooth key;

UWB + BLE key: a set of UWB car key system comprises 1 PEPS controller + N UWB anchor point, and the common car end hardware framework of UWB has two kinds of schemes: a, 4+ in-vehicle 1 outside the vehicle: arrange 4 UWB anchor points in the car front and back bumper both sides, anchor point arranges in the car in well accuse position, B: "0 + in-vehicle 4 outside vehicle": 4 UWB anchor points are arranged on two sides of the B column in the vehicle and at the front windshield and the rear windshield.

The above six schemes are all schemes adopted by the current vehicle enterprise, so far, the NFC + BLE key and the UWB + BLE key are the most widely applied technical schemes, the NFC + BLE key and the UWB + BLE key are the combination of three basic schemes, namely the NFC key, the BLE key and the UWB key, the combination is the optimal solution of the vehicle enterprise for the digital key, but the combination mode cannot meet the vehicle finding function beyond the range of 50 meters, and cannot meet the requirement of finding vehicles in places with poor cellular data and more barriers.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides an intelligent automobile key based on a gyroscope, a pedometer and a UWB, which has the advantages of no sight distance, no barrier, no influence of a cellular network and the like, and solves the problems that the function of finding vehicles beyond the range of 50 meters cannot be met, and the vehicle finding cannot be carried out in places with poor cellular data and more barriers.

In order to achieve the purpose, the invention provides the following technical scheme: an intelligent automobile key based on a gyroscope, a pedometer and a UWB comprises a key body, a control module and an execution module, wherein the key body, the control module and the execution module are in communication connection;

the key body is internally provided with an angular speed sensing module, a step counting module, a display module, a UWB module, a wireless cellular network module, a Bluetooth module and a wireless transceiver module;

the control chip is arranged in the control module and used for providing control for the key body so as to enable the execution module to execute operation;

the execution module comprises an automobile base station module and an actuator, and the automobile base station module is in communication connection with the actuator and the key body.

Further, angular velocity sensing module is the gyroscope, the meter step module is the pedometer, and gyroscope and pedometer are used for carrying out the record tracking to the user from the orbit behind the car, display module is used for showing time and apart from the distance and the position of vehicle, communication connection between UWB module and the executor is used for controlling the start etc. that the vehicle door was opened, the door window was opened and the vehicle.

Further, the bluetooth module is used for positioning the position of the vehicle, the wireless cellular network provides the intelligent key with the approximate range of the position of the current vehicle owner and the position distance of the vehicle through the position information recorded when the vehicle parks last time, and the key body is further internally provided with a power module for supplying power to the key body.

Further, under the condition that the background of the cellular network is absent and the distance from the vehicle is far, the vehicle is searched by utilizing the angular speed sensing module, the step counting module and the UWB module, and the specific method comprises the following steps:

1) After the user locks the vehicle, the gyroscope and the pedometer continuously record and track the track of the user, and if the user goes to the desert, the relative position of the vehicle of the user and the user can be calculated according to the advancing track data of the user and by combining the algorithm of the gyroscope no matter where the user is.

2) When a user wants to find a car, the car key is opened, the car key can give the relative positions of a person and a car according to the result calculated by the system, the position is guided by the gyroscope at this time, the approximate distance is calculated through the track, the anchor point of the Bluetooth is started, and the accurate position of the person and the car is given according to the distance combined with the pedometer.

3) When the user walks into the Bluetooth area, the distance between the vehicle and the user is accurately calibrated according to the calculated step number and the anchor point of the Bluetooth, and the user can quickly find the vehicle according to the direction given by the gyroscope.

Further, under the condition of having a wireless cellular network, the wireless cellular network can carry out long-distance communication, has good network support, and solves the problem that a user is at a position which is hundreds of meters away from a vehicle or even more than 1 kilometer away from the vehicle.

Further, the bluetooth module corresponds to three different transmission powers, which specifically includes:

1) When the transmitting power is-20 dBm and the sensitivity of the receiver is-70 dBm, the allowed path loss is 50dB, which corresponds to the communication distance of 2.5 m;

2) When the transmitting power is 0dBm and the sensitivity of the receiver is-80 dBm, the allowed path loss is 80dB, which corresponds to the communication distance of 40 m;

3) With a transmit power of 10dBm and a receiver sensitivity of-90 dBm, the allowable path loss is 100dB, corresponding to a communication distance of 250 m.

Further, the bluetooth module application scenario is as follows:

A. there are wireless networks: under the condition that network signals of the vehicle are good, the vehicle adopts-20 dBm transmitting power, reduces the power consumption and provides a vehicle approximate accurate range for a vehicle owner;

B. under the condition of bad network and obstacles, the transmitting power of 0dBm is adopted, so that the power consumption is reduced, and the range accuracy of 40 meters is brought to users;

C. in an underground garage and places with more barriers, the transmitting power of-90 dBm is adopted, and the accurate range of hundreds of meters can be brought to users under the condition of closing a cellular network.

Further, under the condition that the vehicle is far away from the vehicle in the normal cellular network, the vehicle is searched by using the wireless cellular network module, the bluetooth module and the UWB module, and the specific method is as follows:

a. the user prompts the range and the approximate direction of the distance through a screen on the car key, and the wireless cellular network judges the approximate direction of the car according to the position information when the car is parked and the position information of the current user, and the distance and the direction are changed along with the movement of the user;

b. when a user walks into the range of the Bluetooth, if the number of obstacles is large and the effective range of the Bluetooth is 50 meters, the user is judged to be approximately at the position of the vehicle according to the signal values of the Bluetooth antennas in 4 directions of the vehicle body;

c. the positioning and ranging functions of the UWB anchor points can be started within the range of 10-20 meters, the actuators within the range of 3-10 meters control the car lamps to be turned on or the horns to prompt the car owner to find the car conveniently, when the car owner walks to the distance of 6 meters away from the car, the actuators control the lighting in the car to be turned on automatically, when the car owner walks to the range of 1-3 meters, the car door is unlocked automatically, and when the car owner enters the car and the UWB anchor points in the car scan the UWB signals of the mobile phone, the starting of the car can be realized by pressing the starting key.

Compared with the prior art, the technical scheme of the application has the following beneficial effects:

the intelligent automobile key based on the gyroscope, the pedometer and the UWB module can be used for searching vehicles by utilizing the wireless cellular network module, the Bluetooth module and the UWB module under the condition of normal cellular network and far distance from the vehicles, can locate the positions of the vehicles without sight distance and obstacles at any time and anywhere, and guide vehicle owners to find the positions of the vehicles, can be used for searching the vehicles by utilizing the angular speed sensing module, the step counting module and the UWB module under the condition of no cellular network background and far distance from the vehicles, can be conveniently found by users at sea, in deserts or deep wells, can solve the problem that the users are difficult to find the vehicles at long distance, can achieve the purposes of finding the vehicles without sight distance and obstacles under the conditions of the cellular network and the cellular network, and can also be used for tracking the positions of the users at sea, early warning faults, searching people, object searching and the like, thereby greatly improving the safety of production operation.

Drawings

FIG. 1 is a schematic diagram of the system of the present invention;

FIG. 2 is a schematic view of an automotive antenna according to the present invention;

FIG. 3 is a schematic view of a key body according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, an intelligent vehicle key based on a gyroscope, a pedometer and a UWB in the present embodiment includes a key body, a control module and an execution module, where the key body, the control module and the execution module are in communication connection;

the control chip is arranged in the control module and used for providing control for the key body to enable the execution module to execute operation;

The angular velocity sensing module is a gyroscope, the step counting module is a step counter, the gyroscope and the step counter are used for recording and tracking a track of a user after the user leaves a vehicle, the display module is used for displaying time, distance and direction from the vehicle, and the UWB module is in communication connection with the actuator and used for controlling the opening of a vehicle door, the opening of a vehicle window, the starting of the vehicle and the like.

Gyroscope, an angular velocity sensor, and the price is lower, can bring accurate direction, combines wireless honeycomb and bluetooth, and at the position range that the bluetooth can communicate, start the gyroscope and give the user navigation, walk to the car with the front, as the R1 that fig. 2 shows: distance representing the position of the vehicle to the sensed position of bluetooth, R2: indicating the distance from the vehicle location to a location greater than the bluetooth-sensitive location.

It can be seen intuitively that the range of R2 is the coverage range of the cellular network, which can be understood as the non-line of sight, R2 may be equal to infinity, and the range of R1 is the range of 2.5m to 50m, which is the range of BLE power transmission selected according to the wireless cellular network.

The Bluetooth module is used for positioning the position of a vehicle, the wireless cellular network provides the position of a current vehicle owner and the approximate range of the position distance of the vehicle for the intelligent key through the position information recorded when the vehicle parks last time, and the key body is further internally provided with a power module for supplying power to the key body.

Under the condition that the background of a cellular network does not exist and the distance from a vehicle is far, the vehicle is searched by utilizing an angular speed sensing module, a step counting module and a UWB module, and the specific method comprises the following steps:

Under the condition of having a wireless cellular network, the system can carry out long-distance communication, has good network support, and solves the problem that a user is positioned at a distance of hundreds of meters or even more than 1 kilometer away from a vehicle.

According to the scheme, the position information recorded during the last parking can be used for providing the approximate range of the distance between the current owner position and the current automobile position for the intelligent key through the wireless cellular network.

Three different transmitting powers are corresponded in the Bluetooth module, and the specific steps are as follows:

this is also the lowest transmit power of bluetooth low energy and the communication distance achieved with the lowest sensitivity of the receiver.

this is also the communication distance that is achieved with the transmission power and receiver sensitivity common to bluetooth low energy.

This is also the communication distance that bluetooth low energy has the highest transmit power and is achieved with very good receiver sensitivity.

The application scene of the Bluetooth module is as follows:

A. there is a wireless network: under the condition that network signals of the vehicle are good, the vehicle adopts-20 dBm transmitting power, reduces the power consumption and provides a vehicle approximate accurate range for a vehicle owner;

Under the condition of normal cellular network and far distance from the vehicle, the vehicle is searched by utilizing the wireless cellular network module, the Bluetooth module and the UWB module, and the specific method is as follows:

a. the user prompts the range and the approximate direction of the distance through a screen on the car key, at this time, the wireless cellular network judges the approximate direction of the car according to the position information when the car is parked and the position information of the current user, and the distance and the direction also change along with the movement of the user;

b. when a user walks into the range of the Bluetooth, if the number of obstacles is large and the effective range of the Bluetooth is 50 meters, the user is judged to be approximately in the direction of the vehicle according to the signal values of the Bluetooth antennas in 4 directions of the vehicle body;

Under the condition of normal cellular network and far distance from the vehicle, the vehicle is searched by utilizing the wireless cellular network module, the Bluetooth module and the UWB module, the vehicle can be positioned without sight distance and obstacles at any time and any place, and the vehicle owner is guided to find the position of the vehicle, under the condition that the background of the cellular network is absent and the vehicle is far distance from the vehicle, the vehicle is searched by utilizing the angular velocity sensing module, the step counting module and the UWB module, a user can conveniently search the vehicle at sea, or in a desert or a deep well, the problem that the user can find the vehicle at a long distance can be solved, under the condition that the cellular network is present and the cellular network is absent, the combination of the two technologies can achieve the purpose of finding the vehicle without sight distance and obstacles, and the technology can also track the position of the user at sea, early warn mine faults, search people and object finding, and the like, and the safety of production operation is greatly improved.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an intelligent automobile key based on gyroscope, pedometer and UWB which characterized in that: the key comprises a key body, a control module and an execution module, wherein the key body, the control module and the execution module are in communication connection;

the key body is internally provided with an angular speed sensing module, a step counting module, a display module, a UWB module, a wireless cellular network module, a Bluetooth module and a wireless transceiving module;

the control module is internally provided with a control chip for controlling the key body to enable the execution module to execute operation;

2. A gyroscope, pedometer and UWB-based smart car key as defined in claim 1 wherein: angular velocity sensing module is the gyroscope, the meter step module is the pedometer, and gyroscope and pedometer are used for carrying out the record tracking to the user from the orbit behind the car, display module is used for showing time and distance and the position apart from the vehicle, communication connection between UWB module and the executor is used for controlling the start etc. that the vehicle door was opened, the door window was opened and the vehicle.

3. A gyroscope, pedometer and UWB-based smart car key as defined in claim 1 wherein: the Bluetooth module is used for positioning the position of a vehicle, the wireless cellular network provides the position of a current vehicle owner and the approximate range of the position distance of the vehicle for the intelligent key through the position information recorded during parking last time, and the key body is further internally provided with a power module for supplying power to the key body.

4. The intelligent car key based on gyroscope, pedometer and UWB of claim 1 wherein: under the condition that the background of a cellular network is absent and the distance between the vehicle and the vehicle is far, the vehicle is searched by utilizing the angular speed sensing module, the step counting module and the UWB module, and the specific method is as follows:

3) When the user walks into the Bluetooth area, the distance between the user and the vehicle is accurately calibrated according to the calculated steps and the anchor point of the Bluetooth, and the user can quickly find the vehicle according to the direction given by the gyroscope.

5. A gyroscope, pedometer and UWB-based smart car key as defined in claim 1 wherein: under the condition of having a wireless cellular network, the wireless cellular network can carry out long-distance communication, has good network support, and solves the problem that a user is positioned at a position which is hundreds of meters or even more than 1 kilometer away from a vehicle.

6. A gyroscope, pedometer and UWB-based smart car key as defined in claim 1 wherein: the bluetooth module corresponds to three different transmitting powers, which specifically includes:

7. A gyroscope, pedometer and UWB based smart car key as claimed in claim 6, wherein: the application scenes of the Bluetooth module are as follows:

B. under the condition of bad network and obstacles, 0dBm transmitting power is adopted, so that the power consumption is also reduced, and the range accuracy of 40 meters is brought to users;

8. A gyroscope, pedometer and UWB-based smart car key as defined in claim 1 wherein: under the condition that the vehicle is far away from the vehicle in a normal cellular network, the vehicle is searched by utilizing the wireless cellular network module, the Bluetooth module and the UWB module, and the specific method comprises the following steps:

c. the positioning and distance measuring functions of the UWB anchor points can be started within the range of 10-20 meters, the actuator controls the car light to be turned on or the loudspeaker to prompt within the range of 3-10 meters, a car owner can conveniently find the car, when the car owner walks to the distance of 6 meters away from the car, the actuator controls the lighting in the car to be automatically turned on, when the actuator walks to the range of 1-3 meters, the car door is automatically unlocked, and when the car owner enters the car and the UWB anchor points in the car scan mobile phone UWB signals, the starting of the car can be realized by pressing the starting key.