Near field communication (NFC)-based digital key safe entry system and vehicle

Abstract

The utility model relates to a digital key safe entry system based on NFC (Near Field Communication). The system comprises NFC detection units arranged on all parts of a vehicle body; the NFC detection unit is in communication connection with the corresponding sub-node MCU; the sub-node MCU is in communication connection with the main node MCU; the main node MCU is in communication connection with a vehicle body domain control unit BCM and a vehicle electronic control unit ECU; after the NFC detection unit reads a radio frequency signal sent by the NFC key, the child node MCU where the NFC detection unit is located sends a starting signal to the main node MCU, the main node MCU sends the starting signal to the vehicle body domain control unit BCM or the vehicle electronic control unit ECU, and the vehicle body domain control unit BCM and the vehicle electronic control unit ECU control corresponding components to execute corresponding actions. In addition, under the condition that the key is forgotten or lost, the vehicle owner can enter the vehicle through the NFC key matched with the NFC detection unit and can also start the vehicle based on the NFC key, and the risk that the vehicle cannot be used or is lost due to the fact that the vehicle key is forgotten or lost is greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to digital key technical field provides a digital key security access system and vehicle based on NFC. BACKGROUND

[0002] The automobile lock system is usually composed of the automobile lock control device and the key installed on the vehicle in advance, and the existing key and the automobile lock control device realize communication through weak ordinary radio waves, and then realize the unlocking of the vehicle door.

[0003] The electric door lock used in the locomotive on the market is mostly realized by the key switch, the electric door lock locks the lock core assembly cover through the electromagnetic valve or the motor, and the lock core assembly cover cannot rotate under the condition of no current conduction, so it can only be powered on by the key, and the door can be opened, and once the key is lost or forgotten, the user cannot unlock the door, which causes inconvenience to the user.

[0004] The application number is 201220375866.7, and the patent name is automobile keyless entry system and automobile, the file is entered into the vehicle through the intelligent key, and the scheme also cannot solve or improve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model provides a digital key security access system based on NFC, aims at improving the above problems.

[0006] The utility model is realized in this way, a digital key security access system based on NFC, the system includes:

[0007] NFC key, and NFC detection unit arranged in each part of the vehicle body;

[0008] The NFC detection unit is in communication connection with the corresponding sub-node MCU;

[0009] The sub-node MCU is in communication connection with the main node MCU;

[0010] The main node MCU is in communication connection with the vehicle body domain control unit BCM and the vehicle electronic control unit ECU;

[0011] After the NFC detection unit reads the radio frequency signal sent by the NFC key, the sub-node MCU where the NFC detection unit is located sends a start signal to the main node MCU, the main node MCU sends the start signal to the vehicle body domain control unit BCM or the vehicle electronic control unit ECU, and the vehicle body domain control unit BCM and the vehicle electronic control unit ECU control the corresponding parts to execute corresponding actions.

[0012] Further, the NFC detection unit is connected with the sub-node MCU through an SPI bus, the sub-node MCU is connected with the main-node MCU through a CAN bus, and the main-node MCU is connected with a body control module (BCM) and an electronic control unit (ECU) through the CAN bus.

[0013] Further, a first NFC detection unit is arranged at a driver-side door, the first NFC detection unit is connected with a first sub-node MCU, and the first sub-node MCU is connected with the main-node MCU; after the first NFC detection unit detects a radio frequency signal emitted by the NFC key, a driver-side door opening signal is sent to the first sub-node MCU, the main-node MCU sends the driver-side door opening signal to the BCM, and the BCM controls the driver-side door to be unlocked.

[0014] Further, a second NFC detection unit is arranged at a trunk, the second NFC detection unit is connected with a second sub-node MCU, and the second sub-node MCU is connected with the main-node MCU; after the second NFC detection unit detects a radio frequency signal emitted by the NFC key, a trunk door opening signal is sent to the second sub-node MCU, the main-node MCU sends the trunk door opening signal to the BCM, and the BCM controls the trunk door to be unlocked.

[0015] Further, a third NFC detection unit is arranged at a central control unit, the third NFC detection unit is connected with a third sub-node MCU, and the third sub-node MCU is connected with the main-node MCU; after the third NFC detection unit detects a radio frequency signal emitted by the NFC key, a signal ignition signal is sent to the third sub-node MCU, the main-node MCU sends the ignition signal to the ECU, and the ECU controls the vehicle to be started.

[0016] The utility model discloses a vehicle, the vehicle is integrated with above-mentioned based on NFC's digital key safety access system.

[0017] The utility model discloses a vehicle, the vehicle is integrated with above-mentioned based on NFC's digital key safety access system. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The utility model discloses a vehicle, the vehicle is integrated with above-mentioned based on NFC's digital key safety access system.

[0019] Figure 2The structure schematic diagram of the digital key safety entering system based on NFC is provided for the embodiment of the utility model. DETAILED DESCRIPTION

[0020] The specific embodiment of the utility model is further explained in detail by comparing the drawings and describing the optimal embodiment.

[0021] Figure 2 The structure schematic diagram of the digital key safety entering system based on NFC is provided for the embodiment of the utility model, for the convenience of explanation, only the part related to the embodiment of the utility model is shown, and the system comprises:

[0022] NFC key, and NFC detection unit arranged at each part of the vehicle body;

[0023] The NFC detection unit is in communication connection with the corresponding sub-node MCU;

[0024] The sub-node MCU is in communication connection with the main node MCU;

[0025] The main node MCU is in communication connection with the vehicle body domain control unit BCM and the vehicle electronic control unit ECU;

[0026] After the NFC detection unit reads the radio frequency signal emitted by the NFC key, the sub-node MCU where the NFC detection unit is located sends a starting signal to the main node MCU, the main node MCU sends the starting signal to the vehicle body domain control unit BCM or the vehicle electronic control unit ECU, and the vehicle body domain control unit BCM and the vehicle electronic control unit ECU control the corresponding parts to perform corresponding actions.

[0027] In the embodiment of the utility model, the NFC detection unit is connected with the corresponding sub-node MCU through the SPI bus, one NFC detection unit is connected with one sub-node MCU, all the sub-node MCUs are connected with the main node MCU through the CAN bus, and the main node MCU is connected with the vehicle body domain control unit BCM and the vehicle electronic control unit ECU through the CAN bus.

[0028] In the embodiment of the utility model, the NFC detection unit is arranged at the main driver side door, the center console and the trunk respectively, the distribution schematic diagram is as shown in Figure 1 The control process of the corresponding parts of the NFC detection unit arranged at different positions is explained as follows.

[0029] (1) setting a first NFC detection unit at the driver's side door, the first NFC detection unit is connected with the first sub-node MCU through SPI bus, the first sub-node MCU is connected with the master node MCU through CAN bus; after the first NFC detection unit detects the radio frequency signal emitted by the NFC key, the first sub-node MCU is sent the door opening signal of the driver's side, the master node MCU sends the door opening signal of the driver's side to the body domain control unit BCM, and the body domain control unit BCM controls the driver's side door to be unlocked.

[0030] (2) setting a second NFC detection unit at the trunk, the second NFC detection unit is connected with the second sub-node MCU through SPI bus, the second sub-node MCU is connected with the master node MCU through CAN bus; after the second NFC detection unit detects the radio frequency signal emitted by the NFC key, the second sub-node MCU is sent the door opening signal of the trunk, the master node MCU sends the door opening signal of the trunk to the body domain control unit BCM, and the body domain control unit BCM controls the trunk door to be unlocked.

[0031] (3) setting a third NFC detection unit at the center console, the third NFC detection unit is connected with the third sub-node MCU through SPI bus, the third sub-node MCU is connected with the master node MCU through CAN bus; after the third NFC detection unit detects the radio frequency signal emitted by the NFC key, the third sub-node MCU is sent the signal ignition signal, the master node MCU sends the ignition signal to the vehicle electronic control unit ECU, and the vehicle electronic control unit ECU controls the vehicle to start.

[0032] The utility model discloses a vehicle based on NFC's digital key safety access system, which comprises a master node MCU, a first sub-node MCU, a second sub-node MCU and a third sub-node MCU, wherein the first sub-node MCU, the second sub-node MCU and the third sub-node MCU are connected with the master node MCU through CAN bus, and the first sub-node MCU, the second sub-node MCU and the third sub-node MCU are connected with the NFC detection unit through SPI bus.

[0033] On the other hand, the utility model also provides a vehicle, which is integrated with the above-mentioned NFC-based digital key safety access system. In the case of key forgetting or loss, the vehicle owner can still enter the vehicle through the NFC key matched with the NFC detection unit, and can also start the vehicle based on the NFC key, greatly reducing the risk of vehicle unavailability or loss due to key forgetting or loss. In addition, the trunk of the vehicle can also be controlled through the NFC key.

[0034] The utility model discloses the method concept and technical scheme of the utility model are adopted, and various non -essential improvements or the direct application of the utility model's concept and technical scheme to other occasions without improvement are all within the protection scope of the utility model.

Claims

1. A digital key security entry system based on NFC, characterized in that: The system comprises: NFC keys and NFC detection units installed on various vehicle body parts; The NFC detection unit is connected to the corresponding sub-node MCU; The sub-node MCU communicates with the master node MCU; The master node MCU is connected to the body domain control unit BCM and the vehicle electronic control unit ECU; After the NFC detection unit reads the radio frequency signal emitted by the NFC key, the sub-node MCU where the NFC detection unit is located sends a start signal to the main node MCU. The main node MCU sends the start signal to the body domain control unit BCM or the vehicle electronic control unit ECU. The body domain control unit BCM and the vehicle electronic control unit ECU control the corresponding components to perform corresponding actions.

2. The NFC-based digital key secure entry system as claimed in claim 1, characterized in that: The NFC detection unit is connected to the sub-node MCU through the SPI bus, the sub-node MCU is connected to the main node MCU through the CAN bus, and the main node MCU is connected to the body domain control unit BCM and the vehicle electronic control unit ECU through the CAN bus.

3. The NFC-based digital key secure entry system as claimed in claim 1, characterized in that: A first NFC detection unit is set at the main driver's side door, the first NFC detection unit is connected to the first sub-node MCU, and the first sub-node MCU is connected to the main node MCU; after the first NFC detection unit detects the radio frequency signal emitted by the NFC key, it sends a main driver's side door opening signal to the first sub-node MCU, and the main node MCU sends the main driver's side door opening signal to the body domain control unit BCM, and the body domain control unit BCM controls the main driver's side door to be unlocked.

4. The NFC-based digital key secure entry system as claimed in claim 1, characterized in that: A second NFC detection unit is set at the trunk, the second NFC detection unit is connected to the second sub-node MCU, and the second sub-node MCU is connected to the main node MCU; after the second NFC detection unit detects the radio frequency signal emitted by the NFC key, it sends a trunk door opening signal to the second sub-node MCU, and the main node MCU sends the trunk door opening signal to the body domain control unit BCM, and the body domain control unit BCM controls the unlocking of the trunk door.

5. The NFC-based digital key secure entry system as claimed in claim 1, characterized in that: A third NFC detection unit is set at the center console, and the third NFC detection unit is connected to the third sub-node MCU, and the third sub-node MCU is connected to the main node MCU; after the third NFC detection unit detects the radio frequency signal emitted by the NFC key, it sends an ignition signal to the third sub-node MCU, and the main node MCU sends the ignition signal to the vehicle electronic control unit ECU, and the vehicle electronic control unit ECU controls the ignition start of the vehicle.

6. A vehicle, characterized in that: The vehicle is integrated with the NFC-based digital key security entry system according to any one of claims 1 to 5.

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