Magnetic Field Sensor Parking Anti-Theft System
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Solution Overview
Problem
Existing anti-theft and monitoring systems for parked vehicles are ineffective in outdoor and public underground parking spaces due to frequent false alarms from detecting animals and difficulty in distinguishing between legitimate vehicle access and attempted break-ins, and are costly to install and maintain.
Innovation Solution
Monitoring the vehicle's effect on the earth's magnetic field using magnetic field sensors to record and compare vehicle-specific magnetic field data, triggering a warning signal for changes indicative of vehicle manipulations such as opening the bonnet or trunk, while using additional sensors to confirm vehicle presence and avoid false alarms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If optical sensors or motion detectors are used to monitor the parking space, then vehicle movements and approach of people can be detected, but false alarms occur too often due to animals approaching or people passing by
Solution Approach 1:
The patent changes the detection parameter from general motion detection (optical sensors, ultrasonic sensors) to specific magnetic field detection. By monitoring changes in the earth's magnetic field caused by ferromagnetic materials in vehicles, the system distinguishes between vehicle-related events and unrelated movements of people or animals, thereby reducing false alarms while maintaining detection accuracy.
2Reliability
If multiple sensors are positioned at different points to achieve complete parking space monitoring, then detection coverage is improved, but the monitoring device becomes expensive overall
Solution Approach 1:
The patent extracts the essential detection function from complex multi-sensor systems and implements it through a single magnetic field sensor. By focusing on detecting the unique magnetic signature of vehicles rather than monitoring all movements in the parking space, the system achieves complete monitoring coverage with minimal sensor infrastructure, significantly reducing device complexity and cost.
3Reliability
If conventional alarm systems are installed in the vehicle, then anti-theft protection is provided, but the cost of installation and retrofitting is great
Solution Approach 1:
The patent introduces an intermediary monitoring system that detects vehicles externally through magnetic field sensors embedded in the parking infrastructure, rather than installing sensors inside each vehicle. This external monitoring approach provides anti-theft protection without requiring vehicle modification, eliminating retrofitting costs and simplifying deployment across all parking spaces.
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
Provides reliable and cost-effective anti-theft protection with reduced false alarms by utilizing the unique magnetic fingerprint of each vehicle and focusing on changes specific to the vehicle itself, rather than external movements, ensuring secure monitoring without complex installations.
Implementation Method 1
the earth's magnetic field above the parking space is recorded by means of at least one magnetic field sensor
Data Source
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AI summary
The method involves monitoring the vehicle parked parking space by the sensors, where the sensor signal is evaluated by an evaluation unit upon modification and a warning signal is given upon existence of a pre-determined signal change. The terrestrial magnetic field over the parking space is recorded by magnetic field sensors according to parking of a vehicle in a parking space and is stored in the form of vehicle-specific magnetic field reference data. An independent claim is also included for a device for theft-deterrent system or monitoring a parked vehicle.