NFC Anti-Theft System for Abnormal Door Opening Detection
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Solution Overview
Problem
Current vehicle anti-theft systems lack effective methods to detect abnormal door openings and alert owners in a timely and secure manner, particularly in scenarios where traditional locking and unlocking mechanisms may fail to ensure vehicle security.
Innovation Solution
An NFC-based anti-theft system is implemented in vehicles, utilizing induction coils and NFC devices to detect door states and trigger alarms and alerts when abnormal openings occur, integrating enabling, detection, determination, alarm, and disabling modules to manage locking and unlocking operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional locking and unlocking mechanisms are used, then the vehicle can be secured, but the system cannot effectively detect abnormal door openings or alert owners in a timely manner
Solution Approach 1:
The patent introduces NFC tags as intermediary elements attached to door handles and an NFC reader in the control unit. When a door is opened, the NFC tag comes into proximity with the reader, triggering detection of the opening event. This intermediary mechanism enables the system to detect abnormal door openings that traditional mechanical locks cannot sense, thereby resolving the contradiction between basic locking functionality and abnormal opening detection capability
Solution Approach 2:
The patent replaces traditional mechanical door status detection with electromagnetic NFC technology. Instead of relying on mechanical switches or sensors in the locking mechanism, the system uses NFC fields to detect door openings. This substitution enables non-contact detection of door events, improving the system's ability to detect and report abnormal openings while maintaining the simplicity of traditional locking mechanisms
2Reliability
If NFC-based detection system is implemented, then abnormal door openings can be detected and owners alerted, but the device complexity increases
Solution Approach 1:
The patent divides the anti-theft system into independent modular components: NFC tags attached to individual door handles, NFC readers in the control unit, and a communication module. Each component performs a specific function, and they can be added or removed independently. This segmentation allows the system to achieve sophisticated detection capabilities while maintaining manageable complexity through modular architecture
Solution Approach 2:
The NFC reader and communication unit serve multiple functions: they detect door openings, identify which specific door was opened, communicate with the owner's mobile device, and integrate with the existing locking mechanism. This multi-functionality reduces the need for separate dedicated components for each task, thereby limiting the increase in overall system complexity while achieving comprehensive door monitoring
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system provides enhanced security by promptly alerting owners of unauthorized door openings and ensuring secure locking and unlocking operations, thereby improving vehicle security and owner notification.
Implementation Method 1
an NFC device (15) is installed on each door frame of a body (not shown in FIG. 1), and each induction coil (140) corresponds to an NFC device (15). When one of the doors (14) is close to a corresponding door frame, a distance between the induction coil (140) on the outer side of the door (14) and the NFC device (15) on the corresponding door frame decreases.
Data Source
AI summary
In an anti-theft method for an automobile, each of NFC devices on the automobile is activated to detect corresponding induction coils when the automobile receives a preset door locking command. The method confirms a status of each of the plurality of doors according to detecting whether each of the NFC devices detects the corresponding induction coil, and further determines whether at least one of the doors of the automobile is opened abnormally according to the confirmed status of each of the doors. When at least one of the doors of the automobile is determined to be opened abnormally, the method controls an alarm unit of the automobile to output a preset warning.