A wireless key anti-collision method

Abstract

This invention provides a wireless key anti-collision method. By reprogramming the program, only a single byte at a fixed position needs to be added to the low-frequency information emitted by the vehicle. This allows the key to recognize the connection status between the vehicle and the key, thus avoiding interference between multiple keys. Compared to hardware improvements, this method significantly reduces costs. Furthermore, since the improvement is made to the user's own key system, when a key is copied by unauthorized personnel, the system will prevent the simultaneous use of keys that might interfere with the user's normal operation, effectively improving key security.

Description

Technical Field

[0001] This invention relates to a method for preventing collisions with wireless keys. Background Technology

[0002] Nowadays, wireless keys for vehicles are widely used. Due to their convenience, users rely on them directly. Therefore, if the vehicle's response to the key commands is incorrect, the user cannot change or correct it and can only rely on the key and hardware to operate it.

[0003] During this process, if keys with the same frequency, such as spare keys or copied keys, are used to operate the vehicle at the same time, mutual interference is likely to occur. When two or more keys operate different function keys at the same time, the signals received by the vehicle's system will collide and become chaotic during transmission, which will affect the function keys of the keys and cause them to malfunction, thereby affecting the failure of certain functions of the vehicle and leaving loopholes for illegal activities such as car theft.

[0004] In existing technologies, frequency hopping is used to avoid interference between keys of the same frequency. This involves adding different frequency transmitting hardware to the key. When signal collision interference occurs, causing functional failure, the key will actively jump to another frequency to transmit, thus ensuring normal use without affecting the vehicle's receiver.

[0005] This can solve the problems of conflict and failure for conventional backup keys, but due to the hardware improvement of the key, it requires increased costs, which is not user-friendly. Moreover, if it is used maliciously, multiple keys will interfere with each other, and the wireless key will no longer be usable, leaving an opportunity for criminals. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a wireless key anti-collision method, which optimizes operation by means of software program without modifying the hardware, so that the wireless key controls itself according to the LF information it receives, and makes an invalid response when multiple keys are connected to the vehicle at the same time, thereby avoiding collision.

[0007] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0008] A wireless key anti-collision method includes a remote key located within a range capable of receiving low-frequency (LF) information transmitted by a vehicle. A flag bit is stored in the LF information, indicating whether a key is connected or not. When the vehicle connects to the remote key and begins operation, the flag bit indicates a key connection. At this time, the LF information containing the flag bit is transmitted and received by the remote key. Other keys, besides the currently operating key, upon receiving the LF information and recognizing the flag bit as connected, do not activate their own remote control system (RKE). In this state, even pressing buttons will be ineffective. The remote key enters a waiting mode, only receiving LF information and not transmitting remote control information until the flag bit in the received LF information indicates no connection. Then, the remote control system is activated to connect to and operate the vehicle.

[0009] Furthermore, the flag bits in the low-frequency information are in fixed positions and are not limited by the format of the low-frequency information.

[0010] Furthermore, the flag bit is located within the fixed position of the low-frequency information, with an additional byte added.

[0011] Furthermore, the signal display of the flag bit is set to 0 or 1, where 1 indicates that a key is connected and 0 indicates that no key is connected.

[0012] Furthermore, the operation process of this method is as follows:

[0013] The first step is to bring the remote key into the range of receiving low-frequency information;

[0014] The second step involves the remote control key receiving low-frequency information.

[0015] The third step involves the remote key interpreting low-frequency information and identifying the information of the marker bits to determine whether the vehicle is connected to the key.

[0016] Fourth step: If a connection is detected, return to the second step and wait. At this time, the remote key is in a silent state, does not start the remote control system, and does not send remote control information.

[0017] Fifth step: If it is determined that there is no connection, connect to the vehicle's receiver, turn on the remote control system, and execute button operations.

[0018] Compared with existing technologies, the wireless key anti-collision method provided by this invention, by reprogramming the program, only requires adding a fixed-position byte to the low-frequency information emitted by the vehicle, which allows the key to recognize the connection status between the vehicle and the key, thereby avoiding the phenomenon of multiple keys interfering with each other. Compared with hardware improvements, it greatly reduces the cost. At the same time, since the improvement is made to the user's own key system, when the key is copied by unauthorized personnel, it will also be unable to use the key that interferes with the user's normal use due to the system, effectively improving the security of the key. Attached Figure Description

[0019] Appendix Figure 1 A schematic diagram of the system of the present invention is shown.

[0020] Appendix Figure 2 The following is a flowchart illustrating the operation of the present invention.

[0021] Appendix Figure 3 A schematic diagram of low-frequency information of the present invention is shown. Detailed Implementation

[0022] In one embodiment, such as Figure 1 As shown, a wireless key anti-collision method includes a remote key located within a range capable of receiving low-frequency (LF) information sent by a vehicle. A flag bit is stored in the LF information, indicating whether a key is connected or not. When the vehicle connects to the remote key and begins operation, the flag bit indicates a key connection. At this time, the LF information containing the flag bit is sent out and received by the remote key. Other keys, besides the currently operating key, receive the LF information and, upon recognizing the flag bit as connected, do not activate their own remote control system (RKE). In this state, even pressing buttons will be ineffective. The remote key enters a waiting mode, only receiving LF information and not sending remote control signals until the flag bit identified in the received LF information indicates no connection. Then, the remote control system is activated to connect to and operate the vehicle.

[0023] In one embodiment, the flag bit in the low-frequency information is further positioned in a fixed location, not limited by the format of the low-frequency information; the position of the flag bit is one byte added within the fixed position of the low-frequency information; the signal display of the flag bit is set to 0 or 1, where 1 indicates a key connection and 0 indicates no key connection.

[0024] In one embodiment, such as Figure 2 The operation flow of this method is as follows:

[0025] The first step is to bring the remote key into the range of receiving low-frequency information;

[0026] The second step involves the remote control key receiving low-frequency information.

[0027] The third step involves the remote key interpreting low-frequency information and identifying the information of the marker bits to determine whether the vehicle is connected to the key.

[0028] Fourth step: If a connection is detected, return to the second step and wait. At this time, the remote key is in a silent state, does not start the remote control system, and does not send remote control information.

[0029] Fifth step: If it is determined that there is no connection, connect to the vehicle's receiver, turn on the remote control system, and execute button operations.

[0030] The method of the present invention can effectively prevent conflicts between multiple keys, does not require modification of the key and vehicle hardware, and is compatible with existing vehicles. It is easy to operate and has outstanding results.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit the technical solutions. Those skilled in the art should understand that any modifications or equivalent substitutions to the technical solutions of the present invention without departing from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. A method for preventing collisions with a wireless key, characterized in that, It includes a remote key located within the range to receive low-frequency (LF) information sent by the vehicle. The LF information stores a flag indicating whether a key is connected or not. When the vehicle is connected to the remote key and begins operation, the flag indicates a key connection. At this time, the LF information with the flag is sent out and received by the remote key. Other keys, besides the one currently in operation, receive the LF information, recognize the flag as connected, and do not activate their own remote control system (RKE). In this state, even pressing buttons will be ineffective. The remote key enters a waiting mode, only receiving LF information and not sending remote control signals until the flag in the received LF information indicates no connection. Then, the remote control system is activated to connect to and operate the vehicle.

2. The wireless key anti-collision method according to claim 1, characterized in that, The flag bits in low-frequency information are in fixed positions and are not limited by the format of low-frequency information.

3. The wireless key anti-collision method according to claim 1, characterized in that, The flag bit is located within the fixed position of the low-frequency information, with an additional byte added.

4. The wireless key anti-collision method according to claim 1, characterized in that, The signal display of the flag bit is set to 0 or 1, where 1 indicates that a key is connected and 0 indicates that no key is connected.

5. A wireless key anti-collision method according to claim 1, characterized in that, The operation procedure for this method is as follows: The first step is to bring the remote key into the range of receiving low-frequency information; The second step involves the remote control key receiving low-frequency information. The third step involves the remote key interpreting low-frequency information and identifying the information of the marker bits to determine whether the vehicle is connected to the key. Fourth step: If a connection is detected, return to the second step and wait. At this time, the remote key is in a silent state, does not start the remote control system, and does not send remote control information. Fifth step: If it is determined that there is no connection, connect to the vehicle's receiver, turn on the remote control system, and execute button operations.

Images