CN115988616A

CN115988616A - Method for reducing electricity consumption of car key, computer equipment and storage medium

Info

Publication number: CN115988616A
Application number: CN202211529368.8A
Authority: CN
Inventors: 许林; 尹涛; 唐如意; 朱乾勇; 杨寒光; 李来生
Original assignee: Chengdu Seres Technology Co Ltd
Current assignee: Chongqing Selis Phoenix Intelligent Innovation Technology Co ltd
Priority date: 2022-11-30
Filing date: 2022-11-30
Publication date: 2023-04-18

Abstract

The application relates to a method for reducing electric quantity consumption of a vehicle key, computer equipment and a storage medium, comprising the following steps: receiving and decoding a first frequency signal, and checking data obtained by decoding to check the legality of the first frequency signal; if the first frequency signal comprises the polling command, the indicator light is controlled not to flicker and a second frequency signal is replied. When the car machine polls, control car key pilot lamp no longer frequently glimmers, when not influencing and using keyless entry function and button function, the scintillation of car key pilot lamp has reduced the electric quantity consumption of car key.

Description

Method for reducing electricity consumption of car key, computer equipment and storage medium

Technical Field

The present application relates to the field of automobiles, and in particular, to a method, a computer device, and a storage medium for reducing power consumption of a key of an automobile.

Background

With the increasing intellectualization of automobiles, particularly the popularization of a PEPS intelligent entry and start system, the automobile can be connected with an automobile key in real time, and signals are sent to the automobile key or received to reply the signals of the automobile key so as to execute the operations of unlocking the automobile door in advance, electrifying the automobile in advance and opening or closing the automobile window and the trunk.

The key receives various signals, and the indicator light is frequently lighted in response to the signals, so that the power of the key power supply battery is consumed too fast. For example, when the car key is powered by a conventional CR2032 lithium manganese button battery with a rated voltage of 3V, the service life of the battery is often only about half a year, and thus, the problem of rapid consumption due to frequent lighting of the indicator lamp of the car key exists.

Disclosure of Invention

Therefore, the method, the computer device and the storage medium for reducing the electric quantity consumption of the vehicle key are provided, and the problem that the electric quantity consumption of the vehicle key is too fast in the prior art is solved.

In one aspect, a method for reducing power consumption of a vehicle key is provided, which includes:

receiving and decoding a first frequency signal, and checking data obtained by decoding to check the legality of the first frequency signal;

if the first frequency signal comprises the polling command, the indicator light is controlled not to flicker and a second frequency signal is replied.

In one embodiment, receiving and decoding a first frequency signal, and checking data obtained by decoding to check the validity of the first frequency signal comprises:

receiving and decoding the first frequency signal to obtain a random number and a physical address carried by the first frequency signal, wherein the random number is obtained by encoding and encrypting a physical address of a vehicle machine, and the physical address is used for storing a network position of the vehicle machine;

comparing the decoding result of the random number with the physical address to obtain a result value;

and if the result value is 1, the first frequency signal is legal.

In other embodiments, after checking the validity of the first frequency signal, the method further includes:

and if the first frequency signal comprises a keyless entry command, controlling the indicator light to flash, and replying the second frequency signal to enable the car machine to receive and execute the keyless entry command, wherein the keyless entry command comprises a car door unlocking command.

and if the first frequency signal comprises a key command, controlling the indicator light to flicker, and replying the second frequency signal to enable the vehicle machine to receive and execute the key command.

In another aspect, a method for reducing power consumption of a vehicle key is provided, which is applied to a vehicle end, and includes:

when the vehicle body control module detects that the polling enabling condition is met, the vehicle-mounted communication module sends a first frequency signal so that a vehicle key receives, decodes and verifies the first frequency signal;

when the vehicle-mounted communication module receives a second frequency signal, the position of a vehicle key is judged according to the second frequency signal so as to judge whether the first frequency signal is sent or not.

In one embodiment, the body control module detects a polling enabled condition, comprising:

the vehicle body control module detects whether a vehicle door is in a closed state or whether a main driving seat is occupied or not;

and when the vehicle door is in a closed state and/or no person is in the main driving seat, the vehicle-mounted communication module sends the first frequency signal.

In other embodiments, when the vehicle-mounted communication module receives a second frequency signal, determining a position of a vehicle key according to the second frequency signal to determine whether to transmit the first frequency signal includes:

when the vehicle-mounted communication module receives the second frequency signal, obtaining a first distance according to an indicated value of signal strength, wherein the first distance is a distance between a vehicle machine and a vehicle key;

when the first distance is smaller than the second distance, the vehicle-mounted communication module sends the first frequency signal so that a vehicle key receives and responds;

and when the first distance is greater than a third distance, the vehicle-mounted communication module stops sending the first frequency signal.

In another aspect, a computer device is provided, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, the method for reducing the electricity consumption of the vehicle key is implemented.

In other aspects, a computer-readable storage medium is provided, on which a computer program is stored, which computer program, when being executed by a processor, carries out the method steps of reducing power consumption of a vehicle key.

According to the method, the computer device and the storage medium for reducing the electric quantity consumption of the car key, the car key receives the first frequency signal sent by the vehicle-mounted communication module of the car machine, the car key decodes the received first frequency signal, the data obtained by decoding is verified, the legality of the first frequency signal is verified, if the first frequency signal is legal, whether the command type comprises a polling command or not is judged, if the command type comprises the polling command, an indicator lamp of the car key is controlled to be turned off, and when the keyless entry function and the key function are not affected, the flicker of the indicator lamp of the car key is avoided, so that the electric quantity consumption caused by frequent lighting of the indicator lamp when the car key is polled by the car machine is reduced, and the service life of a battery is prolonged.

Drawings

FIG. 1 is a schematic flow chart illustrating a method for reducing power consumption of a vehicle key according to an embodiment;

FIG. 2 is a flow diagram illustrating a process for decoding and verifying a first frequency signal according to one embodiment;

fig. 3 is a schematic flow chart illustrating a process of determining whether to transmit the first frequency signal at the vehicle end according to an embodiment.

FIG. 4 is a flow diagram illustrating an embodiment of a vehicle-end enabled polling condition detection process.

Fig. 5 is a flowchart illustrating a process of determining to transmit the first frequency signal at the vehicle end in one embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated. The structures, proportions, sizes, and other dimensions shown in the drawings and described in the specification are for understanding and reading the present disclosure, and are not intended to limit the scope of the present disclosure, which is defined in the claims, and are not essential to the art, and any structural modifications, changes in proportions, or adjustments in size, which do not affect the efficacy and attainment of the same are intended to fall within the scope of the present disclosure. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.

Currently, a car is equipped with a Po l i ng function, which is used to query a car Key, obtain a connection state of the car Key, and receive a reply signal of the car Key to determine a position of the car Key, so as to execute various kinds of car keys, such as PEPS (Pass i ve Entry Pass i ve Start, keyless Entry and Start function) or RKE (Remote Key i ess Entry, remote access control function), etc.

Po l i ng (polling) is a way for a CPU (Central processing Unit) to decide how to provide peripheral services. The CPU sends out inquiry at regular time to inquire each peripheral equipment whether it needs its service or not in sequence, if so, the peripheral equipment gives service, and after the service is over, the peripheral equipment asks the next peripheral equipment, and then the process is repeated. And the vehicle-mounted communication module of the vehicle machine periodically sends Po l i ng requests, inquires the position of the vehicle key, and establishes connection with the vehicle key so as to realize PEPS, RKE or other functions.

However, when the car is loaded with the car pos l i ng, the indicator light of the car key may frequently blink to consume unnecessary power. Therefore, a method for reducing power consumption of a vehicle key is provided to reduce unnecessary power consumption of the vehicle key, as shown in fig. 1, comprising:

s1, receiving and decoding a first frequency signal, and verifying data obtained by decoding to verify the legality of the first frequency signal;

when the Po l i ng function is started by the car machine, the car key receives a first frequency signal, a transponder is arranged in the car key, and a 3D (3-D imens i ona l) antenna is arranged in the transponder and can automatically receive, send and process signals with three dimensions. The low-frequency Po l i ng signal of 125Khz sent by a vehicle machine, namely the first frequency signal, can be received. And decoding and checking the first frequency signal, and controlling the indicator light not to flicker and replying the second frequency signal through the signal transmitter when the first frequency signal is identified to comprise the polling command after the checking is legal.

And S2, if the first frequency signal is legal, judging whether the first frequency signal comprises a polling command, and if the first frequency signal comprises the polling command, controlling the indicator light not to flicker and replying a second frequency signal.

The transmission of the second Frequency signal may be performed through a Super hi-Frequency band, where a Super hi-high Frequency (UHF) is a radio wave having a wavelength range of 1m to 1dm and a Frequency of 300 MHz to 3000MHz, and is mainly used for short-range communication, may be transmitted and received through a small and short antenna, is suitable for mobile communication, is commonly used in the fields of mobile communication and broadcast television, and may be installed in a car key to reduce the volume of the car key. Preferably, but not limited to, bluetooth communication is available, bluetooth communication is a wireless communication technology like wifi and zigbee, various devices can directly establish communication connection, bluetooth uses 2.4GHz frequency radio for communication, and bluetooth device can be used for sending the second frequency signal at the key end of the vehicle and receiving the second frequency signal at the vehicle end.

Preferably, the signal transmission may be performed using BLE (Bluetooth Low energy), i.e., a Bluetooth Low energy module. BLE uses radio communication in the same frequency band as traditional Bluetooth, and is characterized by low cost, low power consumption and interoperability. When the BLE module in the vehicle-mounted communication module sends out a key inquiry request, the position of the Bluetooth key is inquired, and the Bluetooth key receives the key inquiry request, establishes connection with the BLE module in the vehicle-mounted communication module and replies a second frequency signal.

In one embodiment, receiving and decoding a first frequency signal, and checking data obtained by decoding to check the validity of the first frequency signal, according to fig. 2, includes:

s11, receiving and decoding the first frequency signal to obtain a random number and a physical address carried by the first frequency signal, wherein the random number is obtained by encoding and encrypting the physical address of the vehicle machine, and the physical address is used for storing the network position of the vehicle machine;

the data frame of the first frequency signal is provided with a lead code and a synchronous code, wherein the lead code can receive data and has the function of synchronizing a receiver clock of a target host machine and a transmitter clock of a source host machine. Immediately follows a frame start delimiter byte "10101011" to indicate the start of the frame. The preamble is intended to isolate each ethernet frame and is also a locator. Because ethernet is lengthy, a preamble is required between each frame to distinguish. In a digital communication system between a key and a vehicle, digital signals representing messages are transmitted in frames, i.e. a code word is composed of a certain number of symbols, and a frame is composed of a number of code words. The receiver must decode the start and stop positions of each codeword, which necessitates a synchronization mechanism in the process, where a buffer is used to process the received data frames that satisfy the start and end of the frame in the buffer.

Optionally, the encryption and decryption of the first frequency signal may be implemented by using an AES-256 (Advanced encryption i on Standard) symmetric encryption algorithm. The symmetric encryption mode enables the encryption and decryption processes to be the same, and compared with an asymmetric encryption method, the method needs less calculation force and greatly improves the decryption speed. The first step of the AES-256 encryption process is to replace the information with the substitution table, the second transformation will change the data rows, the third transformation the columns change the data rows, and the last transformation is the basic mutual exclusion process done on each column using a different part of the encryption key. The longer the encryption key, the more rounds are required, and 14 rounds are required for both decryption and encryption of AES-256 to ensure the security of the cipher.

The decoded first frequency signal comprises an Identification (ID) ID (identity identification number) used for identifying the identity of the car machine when the car machine is connected with the vehicle-mounted communication module, and a random number Cha l enge is obtained by encrypting the physical address code of the car machine; the random number calculation value Mac is used for storing the physical address of the car machine; commands CMD, including PEPS commands, and Po l i ng commands, e.g., "0101" for PEPS commands and "0110" for Po l l i ng commands.

S12, comparing the decoding result of the random number with the physical address to obtain a result value;

decoding the random number Cha l enge according to a decryption mode of AES-256 to obtain a string of binary data frames, and comparing the binary data frames with a physical address Mac of the vehicle machine through an identification unit to obtain a result value Resu l t.

For example, during data transmission, there may be a case where data is erroneous. In order to ensure the correctness of data transmission, some methods are adopted to judge whether the data is correct or not, or timely find and correct the data when the data is wrong, and check and compare two or more groups of data. The identification unit may check the first frequency signal in any one of the above-mentioned several data checking manners, including but not limited to, and indicate a result of the check Resu l t by "1" or "0".

And S13, if the result value is 1, the first frequency signal is legal.

If the Resu l t value is 1, the first frequency signal received by the vehicle-mounted communication module is legal, and the vehicle-mounted communication module continues to judge whether the first frequency signal comprises a polling signal; if the comparison result value Resu l t is not 1, the received first frequency signal is illegal, and the vehicle key discards the first frequency signal and continues to be in a state to be received.

In one embodiment, after verifying the validity of the first frequency signal, the method further includes:

When the PEPS function is started by the vehicle and the vehicle key is connected with the vehicle machine, the indicating lamp of the vehicle key can continuously flash. When the distance between the car key and the car machine is 2m, the car body control module controls and executes four-door unlocking actions. When the distance between the car key and the car machine is continuously reduced, and a car owner touches a door handle to open the car door, the limit switch in the car door recognizes that the car door is opened, the signal is sent to the vehicle-mounted communication module through the controller local area network, the vehicle-mounted communication module sends a signal for stopping the flickering of the indicator light to the car key, and the indicator light is turned off by the car key receiving signal.

When the vehicle PEPS system is equipped with the automatic window lifting function, when the distance between the vehicle machine and the vehicle key exceeds 6m, the vehicle window of the vehicle automatically ascends and is locked, the vehicle starts the anti-theft function, and at the moment, the indicator light of the vehicle key flickers.

In other embodiments, after verifying the validity of the first frequency signal, the method further includes:

And if the first frequency signal comprises a key command, the indicator lamp of the car key flashes, and the key command signal of the car key is sent to the car machine through the Bluetooth module, namely, the RKE remote control access control system is executed. The RKE of the vehicle can control opening and closing of the windows and the trunk in addition to opening and closing of the doors. The vehicle-mounted communication module receives the key command signal and sends a signal for opening or closing a vehicle door and opening or closing a vehicle window or a trunk to the vehicle body control module through the controller local area network, and the vehicle body controller executes the key command.

In another aspect, a method for reducing power consumption of a vehicle key is provided, which is applied to a vehicle end and includes:

s31, when the vehicle body control module detects that the polling enabling condition is met, the vehicle-mounted communication module sends a first frequency signal so that a vehicle key receives, decodes and verifies the first frequency signal;

and S32, when the vehicle-mounted communication module receives a second frequency signal, judging the position of the vehicle key according to the second frequency signal so as to judge whether to send the first frequency signal.

In one embodiment, the body control module detects a polling enabled condition, as shown in FIG. 4, comprising:

s311, the vehicle body control module detects whether a vehicle door is in a closed state or whether a person is in a main driving seat;

and S312, when the vehicle door is in a closed state and/or no person is in the main driving seat, the vehicle-mounted communication module sends the first frequency signal.

In order to recognize whether the door is closed, the open and closed states of the door may be recognized by providing a door sensing switch sensor. For example, the position of the vehicle door inductive switch sensor can be arranged near a door catch of a vehicle door, and one of a travel switch and a limit switch can be adopted, so that the vehicle door inductive switch sensor is a common low-current master control electrical appliance. The contact of the mechanical moving part is operated by the collision to realize the connection or disconnection of the control circuit, thereby achieving a certain control purpose. The vehicle-mounted communication module is used for receiving a vehicle door closing signal, and the vehicle-mounted communication module is used for receiving the vehicle door closing signal.

By providing the seat sensor on the seat controller, it is possible to identify whether the seat of the cabin is occupied, for example, by means of a weight sensor or an electronic camera. Four weight sensors can be arranged and are not limited to be respectively arranged at the bottoms of the main driving seat, the assistant driving seat and the rear row seat, when a person sits on the seats, the weight sensors can identify the pressure, and whether the person sits on the seats can be identified according to the pressure.

Still can discern whether someone on the seat through electronic camera, the preferred can set up an infrared sensing camera at the well accuse platform of car machine, whether the temperature identification seat of thermal radiation of seat position is someone whether no matter daytime night.

When detecting that the door is closed and no one is on the seat of the vehicle, the vehicle-mounted communication module opens Po l i ng and sends a first frequency signal to periodically inquire the state of the vehicle key so as to be connected with the vehicle key.

In one embodiment, when the vehicle-mounted communication module receives a second frequency signal, determining a position of a vehicle key according to the second frequency signal to determine whether to transmit the first frequency signal, according to fig. 5, includes:

s321, when the vehicle-mounted communication module receives the second frequency signal, obtaining a first distance according to an indicated value of signal strength, wherein the first distance is a distance between a vehicle machine and a vehicle key;

in order to determine how far away the indicator light of the car key is from the car machine, the distance between the car machine and the car key needs to be obtained, and the numerical value of the first distance can be determined by receiving the indicated value of the signal strength of the high-frequency signal sent by the car key. The indicated value of the signal Strength (recei ved si gna l Strength I nd I cat I on, RSS I) represents the Strength of the received signal Strength, the unit corresponding to the value of RSS I is dBm, dBm (Dec I be l-mi l iwatts, decibel milliwatt) represents the relative relation between a certain power and 1mw, and the specific mathematical expression of the value x (dBm) of RSS I and the power P (mw) is as follows:

x＝10*l g(P(mW)/1(mW))

in the invention, the RSS I received by the vehicle-mounted communication module is a negative value, because the wireless signal is mostly in mW level, the wireless signal is polarized and converted into dBm, and the signal is not shown to be negative. 1mW is 0dBm, and less than 1mW is a negative dBm number. The mathematical expression of the first distance is:

wherein ^ is a power operator, d is the first distance and is represented as 10 to the power ((RSSI-A)/(m x n)), RSSI is an indication value of the signal strength obtained from the reply of the key inquiry request, A is an indication value of the signal strength of the reply of the key inquiry request received at the vehicle end L, L is a positive number, n is an environmental attenuation factor, where m is a positive number.

Illustratively, L is 1m, and the indicator A of the measured signal strength at 1m is-59 dBm. And m is an integer, and m can be set to be 10 and substituted into the mathematical expression of the first distance d, so that the first distance d between the current node key and the vehicle-mounted communication module can be calculated.

S322, when the first distance is smaller than the second distance, the vehicle-mounted communication module sends the first frequency signal so that a vehicle key receives and responds;

when the distance between the car machine and the car key is smaller than the preset second distance, the second distance can be set to be 6m exemplarily, when the distance between the car key and the car machine is judged to be reduced and the car is approaching to the car, when the first distance is smaller than 6m, the car key wakes up the whole car, the vehicle-mounted communication module continues to send the first frequency signal, and the indicator light of the car key flickers.

S323, when the first distance is larger than the third distance, the vehicle-mounted communication module stops sending the first frequency signal.

When the vehicle-mounted communication module detects that the distance between the vehicle key and the vehicle machine is greater than or equal to the third distance, exemplarily, the third distance can be set to 8m, and as the vehicle owner is judged to be far away from the vehicle, the vehicle key does not receive the first frequency signal any more, the indicator lamp of the vehicle key does not flicker any more, the vehicle machine does not reply the high-frequency signal any more, and the vehicle machine does not need to send the first frequency signal any more, so that the vehicle-mounted communication module stops sending the first frequency signal.

In one embodiment, a computer device is provided, which includes a memory, a processor, and a computer program stored on the memory and executable on the processor, and when the processor executes the computer program, the method steps for reducing electricity consumption of a vehicle key are implemented as follows:

In one embodiment, the computer device, when executing the computer program, further performs the steps of:

and S13, if the result value is 1, the first frequency signal is legal.

s312, when the vehicle door is in a closed state and/or no person is in the main driving seat, the vehicle-mounted communication module sends the first frequency signal.

In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored which, when being executed by a processor, carries out the method steps of reducing power consumption of a vehicle key.

In one embodiment, the computer program, when executed by the processor, further performs the steps of:

and S13, if the result value is 1, the first frequency signal is legal.

s321, when the vehicle-mounted communication module receives the second frequency signal, obtaining a first distance according to the indicated value of the signal strength, wherein the first distance is the distance between a vehicle machine and a vehicle key;

It should be understood that although the various steps in the flow charts of fig. 1-5 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 1-5 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performing the sub-steps or stages is not necessarily sequential, but may be performed alternately or alternatingly with other steps or at least some of the sub-steps or stages of other steps.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is specific and detailed, but not to be understood as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A method for reducing electricity consumption of a vehicle key, comprising:

receiving and decoding a first frequency signal, and verifying data obtained by decoding to verify the legality of the first frequency signal;

2. The method for reducing the electricity consumption of the vehicle key according to claim 1, wherein the receiving and decoding of the first frequency signal, and the verification of the data obtained by decoding to verify the validity of the first frequency signal comprise:

and if the result value is 1, the first frequency signal is legal.

3. The method for reducing the power consumption of the vehicle key according to claim 1, wherein after verifying the validity of the first frequency signal, the method further comprises:

4. The method for reducing the power consumption of the vehicle key according to claim 1, wherein after verifying the validity of the first frequency signal, the method further comprises:

and if the first frequency signal comprises a key command, controlling the indicator light to flicker, and replying the second frequency signal to enable the car machine to receive and execute the key command.

5. A method for reducing the electricity consumption of a vehicle key is applied to a vehicle end and comprises the following steps:

6. The method of reducing power consumption of vehicle keys of claim 5, wherein the vehicle body control module detects a polling enabled condition comprising:

and when the vehicle door is judged to be in a closed state and/or no person is in the main driving seat, the vehicle-mounted communication module sends the first frequency signal.

7. The method for reducing the electric quantity consumption of the vehicle key according to claim 5, wherein when the vehicle-mounted communication module receives a second frequency signal, the position of the vehicle key is determined according to the second frequency signal so as to determine whether to transmit the first frequency signal, and the method comprises the following steps:

when the vehicle-mounted communication module receives the second frequency signal, obtaining a first distance according to the indicated value of the signal strength, wherein the first distance is the distance between a vehicle machine and a vehicle key;

when the first distance is smaller than a second distance, the vehicle-mounted communication module sends the first frequency signal so that a vehicle key receives and responds;

8. Computer arrangement comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor, when executing the computer program, carries out the method steps of reducing the electrical consumption of a vehicle key according to any one of claims 1-7.

9. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the method steps of reducing the electrical consumption of a vehicle key according to any one of claims 1 to 7.