A vehicle door lock release method, system and storage medium based on keyless entry system

Abstract

The present invention discloses a door lock release method, system and storage medium based on a keyless entry system, including: a keyless entry system controller: locates the position of a smart key and performs logical judgment and processing in combination with feedback of the door and lock status; a smart key: a portable device, one of the legally authorized devices for entering a vehicle; a low-frequency antenna: converts electrical signals into wireless signals, can be installed at a suitable position of the vehicle according to requirements, and cooperates with the keyless entry controller to realize the positioning of the smart key; a door control module: receives vehicle status information feedback, combines the control instructions of the keyless entry system, and sends operations such as door lock unlocking and door electric release; an electric release motor: after receiving a DCM release instruction, executes door release and opening. The present invention can improve the portability and comfort of the owner when actually using the vehicle.

Description

Technical Field

[0001] The invention relates to the field of keyless entry of automobiles. Background Art

[0002] The market demand for intelligent vehicles has led to an increasing penetration of Passive Entry Passive Start (PEPS) technology. The PEPS system brings great convenience to customers. Traditional PEPS can automatically unlock and lock the vehicle by locating the real-time position of the smart key and detecting the user nearby. After the vehicle is unlocked, the user needs to manually pull the door handle to open the door and enter the vehicle.

[0003] With the development of technology, the position of the smart key is located and logical judgment is performed to automatically release the car door on the corresponding side, which greatly increases the portability of the car owner in actual use.

[0004] For example, the patent document with publication number CN109835303A, publication date June 4, 2019, and patent name "Vehicle keyless entry and start system and system based on T-BOX" discloses a system including the original car key, a battery model, and a T-BOX unit, wherein the positive and negative poles of the battery model are provided with power lines for connecting to the T-BOX unit, which are used to replace the original battery of the original car key to supply power to the original car key; the T-BOX unit is used to receive the control commands sent by the mobile terminal and control the vehicle to respond, and to control the power supply or power off of the original car key through the battery model based on the received control commands. Similar keyless entry systems require the car door to be manually opened to release the door lock after the vehicle is unlocked, and the convenience and feasibility are still not enough. Summary of the invention

[0005] The technical problem to be solved by the present invention is that a keyless entry and start system requires manual opening of a car door, and an automatic release method for a car door based on a keyless entry system is realized.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a door lock release method based on a keyless entry system;

[0007] PEPS determines the location of the smart key by receiving the field strength values ​​of each antenna detected by the smart key. The field strength value feedback of the PEPS positioning smart key position is divided into the following areas:

[0008] Area A: smart key sensing area, Area B: vehicle unlocking area, Area S1: right front door edge area, Area S2: right rear door edge area, Area S3: left front door edge area, Area S4: left rear door edge area, Area S5: trunk area, Area S6: vehicle interior area;

[0009] PEPS determines the area where the smart key is located and the door lock and door status. When the unlocking conditions are met, it drives the car door lock motor to unlock the door.

[0010] After unlocking, PEPS determines the area where the smart key is located. When the conditions for automatic door release are met, it drives the electric release motor to execute the electric release and opening of the door.

[0011] After unlocking, if the smart key is detected to be in the defined door opening area beyond T1, the electric release module is driven to open the door on that side.

[0012] After unlocking, if it is detected that the smart key leaves the defined door opening area or stays there for more than the maximum time T2, the vehicle network goes into sleep mode, where T2 is greater than T1.

[0013] The A area is the area from which PEPS can sense the smart key to the outer boundary of the B area. The B area is the area between the A areas outside the vehicle and excludes the S1-S5 areas. The S1 area is the edge area of ​​the right front door, the S2 area is the edge area of ​​the right rear door, the S3 area is the edge area of ​​the left front door, the S4 area is the edge area of ​​the left rear door, and the S5 area is the edge area of ​​the trunk at the rear of the vehicle.

[0014] The field strength threshold inside and outside the vehicle for the front antenna is A1, the field strength threshold near the left front door of the front antenna is A2, the field strength threshold near the left rear door is A3, and the field strength threshold near the back door is A4. The field strength threshold inside and outside the vehicle for the left door antenna is B1, the field strength threshold near the left front door of the left door antenna is B2, the field strength threshold near the left rear door is B3, and the field strength threshold near the back door is B4. The field strength threshold inside and outside the vehicle for the right door antenna is C1, the field strength threshold near the left front door is C2, and the field strength threshold near the left rear door is C3. The field strength setting threshold near the left front door is D2, the field strength setting threshold near the left rear door is D3, and the field strength setting threshold near the back door is D4.

[0015] The decision threshold of S6 area is set as RSS I 1>A1&&RSS I2>B1&&RSS I 3>C1;

[0016] The judgment threshold of S3 area is set as RSS I 1>A2&&RSS I2>B2&&RSS I4<D2&&RSS I 2> RSS I3&& is not in S6 area, S1 area and S3 area are symmetrical;

[0017] The decision threshold of S4 area is set to RSS I 1<A3&&RSS I2> B3&&RSS I4>D3&&RSS I 2>RSS I3&&is not in S6 area, S2 area is symmetrical with S4 area;

[0018] The judgment threshold of S5 area can be set to RSS I2 <B4&&RSS I 3<C4&&RSS I4> D4&& is not in S6 area.

[0019] Smart key entry area: The keyless entry system senses the smart key entry area A, and each module enters the ready state. The keyless entry system detects the key position in real time and feedbacks the door status and lock status.

[0020] The unlocking of the door and the electric release of the door have different welcome modes. If it is detected that the smart key has moved to the S6 area, the automatic door opening function is immediately turned off.

[0021] A vehicle door lock release system based on a keyless entry system, comprising:

[0022] PEPS: drives the low-frequency antenna and receives the high-frequency signal fed back by the smart key to locate the smart key. It also receives the door and lock status information fed back on the CAN and performs logical judgment and processing.

[0023] Smart key: One of the legally authorized devices of the vehicle, which can be located by PEPS to enable the car door to be opened automatically;

[0024] Door control module: detects and feedbacks the vehicle door lock status, receives control instructions from the PEPS system, and is used to execute door lock unlocking and door electric release and opening;

[0025] Electric release motor: After receiving the DCM release command, it executes the door opening;

[0026] The vehicle door lock release system executes the vehicle door lock release method based on the keyless entry system.

[0027] The PEPS is provided with a plurality of antennas arranged at different positions in the vehicle, including a front row antenna, a left door antenna, a right door antenna field and a rear guard antenna. The PEPS determines the area where the smart key is located according to the smart key and the field strength values ​​of each antenna.

[0028] A storage medium is a computer-readable storage medium for storing software program codes, wherein the software program codes are used to execute the vehicle door lock release method based on the keyless entry system.

[0029] The present invention can make logical judgments by locating the position of the smart key, and then automatically release the car door on the corresponding side. The judgment is accurate and reliable, and the system is stable and reliable, which greatly improves the portability and comfort of the car owner when actually using it. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The following is a brief description of the contents expressed in each figure in the specification of the present invention:

[0031] Figure 1 This is the functional block diagram of the automatic door release system of the car;

[0032] Figure 2 Locate regional definitions for PEPS;

[0033] Figure 3 The present invention is a flow chart of the automatic release control method of a vehicle door. DETAILED DESCRIPTION

[0034] The following is a further detailed description of the specific implementation methods of the present invention, such as the shape, structure, relative position and connection relationship between the various components involved, the function and working principle of each part, the manufacturing process and operation method, etc., through the description of the embodiments with reference to the accompanying drawings, so as to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention.

[0035] The car door automatic release control system based on the keyless entry system includes:

[0036] Keyless entry system controller PEPS: locates the position of the smart key and performs logical judgment and processing based on the feedback of the door and lock status, drives the low-frequency antenna, and receives the high-frequency signal fed back by the smart key to locate the position of the smart key. At the same time, it receives the door and lock status information fed back on the CAN, and performs logical judgment and processing;

[0037] Smart key: A portable device that is one of the legally authorized devices for entering the vehicle. Through PEPS, it can locate the car door automatically;

[0038] Low-frequency antenna: converts electrical signals into wireless signals. It can be installed in the appropriate position of the vehicle according to needs and cooperates with the keyless entry controller to realize the positioning of the smart key.

[0039] Door control module: receives vehicle status information feedback, combines the control command of the keyless entry system, sends door lock unlocking and door electric release and other operations, that is, detects and feedbacks the door lock status of the whole vehicle, receives the control command sent by the PEPS system, and is used to execute door lock unlocking and door electric release and opening;

[0040] Electric release motor: After receiving the DCM release command, it executes the door release and opening.

[0041] Traditional car doors require users to manually open the doors. This car door automatic release system automatically opens the doors by judging the user's position and combining a specific algorithm, which improves comfort and practicality. The keyless entry system sends a 125KHz signal according to a predetermined data protocol. The electrical signal is converted into a wireless signal through a low-frequency antenna. After the smart key detects the wireless signal, it feeds back the corresponding high-frequency signal (434MHz) in real time. PEPS locates the position of the smart key by receiving the high-frequency signal fed back by the smart key, and then determines whether to automatically release the door through a specific logic algorithm. The antenna arrangement on the car can be referred to as follows: left door antenna: can be arranged inside the left door guard plate; right door antenna: can be arranged inside the right door guard plate; front row antenna: arranged in the front row of the car (such as under the cup holder); rear bumper antenna: arranged on the external rear bumper. The specific location of the smart key can be determined by four antenna groups.

[0042] The keyless entry system determines the position of the smart key by receiving the field strength values ​​of each antenna detected by the smart key feedback. The PEPS positioning smart key position field strength value feedback will be divided into the following areas: A: smart key sensing area, B: vehicle unlocking area, S1: right front door edge area, S2: right rear door edge area, S3: left front door edge area, S4: left rear door edge area, S5: trunk area, S6: interior area.

[0043] A comprehensive judgment is made based on the magnitude of the field strength of each antenna fed back by the received smart key. At the same time, the threshold value of the corresponding area needs to be calibrated in advance. The field strength value fed back by the smart key is detected and compared with the corresponding threshold to determine which area the smart key is in.

[0044] The keyless entry system makes a unified logical judgment based on the area where the smart key is located, combined with the lock status and door status feedback from the door control module. When the unlocking conditions are met, the car door lock motor is driven to unlock the door.

[0045] When the keyless entry system drives the car door lock motor to unlock the door, it further determines the area where the smart key is located. Based on a specific software algorithm, if it detects that the smart key has been near the door for a long time (T can be set) and the conditions for automatic door release are met, it drives the electric release motor to execute the electric release and opening of the door.

[0046] The automatic door release control system defined in this patent can be turned on or off according to user needs. It is independent of the welcome function of the keyless entry system and can let users know the current vehicle status through different welcome modes.

[0047] A method for automatically opening a car door can improve the portability and comfort of the car owner when actually using the vehicle. The present invention arranges vehicle-mounted antennas, calibrates the field strength value range of each antenna at different positions of the smart key, and the keyless entry system judges the area where the smart key is located by the feedback of the field strength values ​​of each antenna; a comprehensive judgment is made in combination with the lock state and door state feedback from the DCM. When the control logic unlocking condition is met, the keyless entry system controls the DCM to execute the whole vehicle unlocking. At this time, if the smart key is detected in the defined area door opening area position for more than T1 (time can be calibrated), the electric release module is driven to open the door on this side. In order to meet the timeliness of automatic door opening, the smart key enters area A, and the keyless entry system senses that the smart key has entered the area, wakes up the network and detects the key position in real time. When leaving area A or staying for more than the maximum time T2, the whole vehicle network is dormant to reduce the power consumption of the whole vehicle.

[0048] According to the regional definition, the field strength value range of each antenna of the smart key at different positions is calibrated. The field strength value range reference and regional division are provided as follows:

[0049] 0x0: Outside of area A

[0050] 0x1: Region A

[0051] 0x2: Area B

[0052] 0x3: S1 region

[0053] 0x4: S2 region

[0054] 0x5: S3 region

[0055] 0x6: S4 region

[0056] 0x7: S5 region

[0057] 0x8: S6 region

[0058] Take four vehicle-mounted antennas as an example to explain how to set the thresholds for each area in the figure above. RSS I 1: The field strength of the front antenna; RSS I2: The field strength of the left door antenna; RSS I 3: The field strength of the right door antenna; RSS I4: The field strength of the rear guard antenna.

[0059] Area S6 is the in-car area, and the setting method is as follows:

[0060] Set the field strength threshold inside and outside the front antenna to A1, set the field strength threshold inside and outside the left door antenna to B1, and set the field strength threshold inside and outside the right door antenna to C1; the judgment threshold of the S6 area can be set to RSS I 1>A1&&RSS I 2>B1&&RSS I 3>C1.

[0061] Area S3 is the area near the left front door. The setting method is as follows:

[0062] Set the field strength threshold near the left front door of the front row antenna to A2, set the field strength threshold near the left front door of the left door antenna to B2, set the field strength threshold near the left front door of the right door antenna to C2, set the field strength threshold near the left front door of the rear protection antenna to D2, and the judgment threshold of the S3 area can be set to RSS I 1>A2&&RSS I2>B2&&RSS I4<D2&&RSS I 2> RSS I 3&& is not in S6 area.

[0063] The S4 area is the area near the left rear door. The setting method is as follows:

[0064] Set the field strength threshold near the left rear door of the front antenna to A3, the field strength threshold near the left rear door of the left door antenna to B3, the field strength threshold near the left rear door of the right door antenna to C3, and the field strength threshold near the left rear door of the rear guard antenna to D3. The judgment threshold of the S4 area can be set to RSS I 1<A3&&RSS I2> B3&&RSS I4>D3&&RSS I 2>RSS I 3&&Not in S6 area.

[0065] S5 is the area near the back door, and the setting method is as follows:

[0066] Set the field strength threshold near the back door of the front antenna to A4, the field strength threshold near the back door of the left door antenna to B4, the field strength threshold near the back door of the right door antenna to C4, and the field strength threshold near the back door of the rear antenna to D4. The judgment threshold of the S5 area can be set to RSS I 2 <B4&&RSS I 3<C4&&RSS I4> D4&& is not in S6 area.

[0067] The S1 region is symmetrical to the S3 region, and the S2 region is symmetrical to the S4 region.

[0068] Smart key entry area: The keyless entry system senses the smart key entry area A, and each module enters the ready state. The keyless entry system detects the key position in real time and feedbacks the door status and lock status.

[0069] Automatic door opening: When the car key is detected to be within area B, the smart key is detected in real time to see if it has entered area S1 / S2 / S3 / S4. When it is detected that the smart key has entered the above area and the stay time exceeds T1 and the lock state is unlocked, the keyless entry system sends an automatic door release command in the corresponding direction through CAN, and the electric release motor executes the corresponding door opening operation, and the corresponding door slowly pops open.

[0070] If the smart key is detected to move to the S6 area (inside the vehicle), the automatic door opening function is immediately turned off. The above process is reactivated when the lock status or door status changes.

[0071] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A door lock release method based on a keyless entry system, characterized in that: PEPS determines the location of the smart key by receiving the field strength values ​​of each antenna detected by the smart key. The field strength value feedback of the PEPS positioning smart key position is divided into the following areas: Area A: smart key sensing area, Area B: vehicle unlocking area, Area S1: right front door edge area, Area S2: right rear door edge area, Area S3: left front door edge area, Area S4: left rear door edge area, Area S5: trunk area, Area S6: vehicle interior area; PEPS determines the area where the smart key is located and the door lock and door status. When the unlocking conditions are met, it drives the car door lock motor to unlock the door. After unlocking, PEPS determines the area where the smart key is located. When the conditions for automatic door release are met, it drives the electric release motor to execute the electric release and opening of the door.

2. The door lock release method based on the keyless entry system according to claim 1, characterized in that: After unlocking, if the smart key is detected to be in the defined door opening area beyond T1, the electric release module is driven to open the door on that side.

3. The door lock release method based on the keyless entry system according to claim 2, characterized in that: After unlocking, if it is detected that the smart key leaves the defined door opening area or stays there for more than the maximum time T2, the vehicle network goes into sleep mode, where T2 is greater than T1.

4. The vehicle door lock release method based on the keyless entry system according to claim 1, 2 or 3, characterized in that: The A area is the area from which PEPS can sense the smart key to the outer boundary of the B area. The B area is the area between the A areas outside the vehicle and excludes the S1-S5 areas. The S1 area is the edge area of ​​the right front door, the S2 area is the edge area of ​​the right rear door, the S3 area is the edge area of ​​the left front door, the S4 area is the edge area of ​​the left rear door, and the S5 area is the edge area of ​​the trunk at the rear of the vehicle.

5. The vehicle door lock release method based on the keyless entry system according to claim 4, characterized in that: The field strength threshold inside and outside the vehicle for the front antenna is A1, the field strength threshold near the left front door of the front antenna is A2, the field strength threshold near the left rear door is A3, and the field strength threshold near the back door is A4. The field strength threshold inside and outside the vehicle for the left door antenna is B1, the field strength threshold near the left front door of the left door antenna is B2, the field strength threshold near the left rear door is B3, and the field strength threshold near the back door is B4. The field strength threshold inside and outside the vehicle for the right door antenna is C1, the field strength threshold near the left front door is C2, and the field strength threshold near the left rear door is C3. The field strength setting threshold near the left front door is D2, the field strength setting threshold near the left rear door is D3, and the field strength setting threshold near the back door is D4. The judgment threshold of S6 area is set as RSSI 1>A1&&RSSI2>B1&&RSSI 3>C1; The judgment threshold of S3 area is set as RSS I 1>A2&&RSSI2>B2&&RSSI4<D2&&RSSI 2> RSS I 3&& is not in the S6 area, the S1 area is symmetrical with the S3 area; The decision threshold of S4 area is set to RSS I 1<A3&&RSSI2> B3&&RSSI4>D3&&RSSI 2>RSS I 3&&is not in the S6 area, and the S2 area is symmetrical with the S4 area; The judgment threshold of S5 area can be set to RSS I2 <B4&&RSS I 3<C4&&RSSI4> D4&& is not in S6 area.

6. The vehicle door lock release method based on the keyless entry system according to claim 5, characterized in that: Smart key entry area: The keyless entry system senses the smart key entry area A, and each module enters the ready state. The keyless entry system detects the key position in real time and feedbacks the door status and lock status.

7. The vehicle door lock releasing method based on the keyless entry system according to claim 1 or 6, characterized in that: The unlocking of the door and the electric release of the door have different welcome modes. If it is detected that the smart key has moved to the S6 area, the automatic door opening function is immediately closed.

8. A door lock release system based on a keyless entry system, characterized in that: include: PEPS: drives the low-frequency antenna and receives the high-frequency signal fed back by the smart key to locate the smart key. It also receives the door and lock status information fed back on the CAN and performs logical judgment and processing. Smart key: One of the legally authorized devices of the vehicle, which can be located by PEPS to enable the car door to be opened automatically; Door control module: detects and feedbacks the vehicle door lock status, receives the control command sent by the PEPS system, and is used to execute door lock unlocking and door electric release and opening; Electric release motor: After receiving the DCM release command, it executes the door opening; The vehicle door lock release system executes the vehicle door lock release method based on the keyless entry system as claimed in any one of claims 1 to 7.

9. The door lock release system based on the keyless entry system according to claim 8, characterized in that: The PEPS is provided with a plurality of antennas arranged at different positions in the vehicle, including a front row antenna, a left door antenna, a right door antenna field and a rear guard antenna. The PEPS determines the area where the smart key is located according to the smart key and the field strength values ​​of each antenna.

10. A storage medium, the storage medium being a computer-readable storage medium for storing software program codes, characterized in that: The software program code is used to execute the vehicle door lock release method based on the keyless entry system as claimed in any one of claims 1-7.

Images