Magnetic Field Sensor Vehicle Identification Parking Detection
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Solution Overview
Problem
Conventional parking detection systems require multiple cameras for each parking grid, leading to excessive costs, and lack the ability to use a single magnetic field sensor for both detection and identification of vehicles.
Innovation Solution
A method and system utilizing a magnetic field sensing apparatus with a magnetic field generator to create a unique identifier signal, allowing a single magnetic field sensing apparatus to detect and identify vehicles by measuring magnetic field differences between sensors before and after vehicle entry and exit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a camera is installed on each parking grid to identify vehicles, then vehicle identification capability is improved, but system cost increases excessively
Solution Approach 1:
The magnetic field sensor is designed to perform multiple functions: both detecting vehicle presence (parking detection) and identifying the vehicle (vehicle identification). By generating unique magnetic field signals from vehicles and detecting these signals with the same sensor used for presence detection, the system eliminates the need for separate identification devices, thereby reducing system cost while maintaining identification capability
Solution Approach 2:
The patent replaces the optical/mechanical camera-based identification system with a magnetic field-based detection system. Instead of using cameras that require complex optical systems and image processing, the invention uses magnetic field sensors to detect and identify vehicles through their unique magnetic field signatures, simplifying the system and reducing costs
2Quantity of substance
If a single magnetic field sensor is used for parking detection, then system cost is reduced, but vehicle identification capability is lost
Solution Approach 1:
The magnetic field sensor is designed to perform multiple functions: both detecting vehicle presence (parking detection) and identifying the vehicle (vehicle identification). By generating unique magnetic field signals from vehicles and detecting these signals with the same sensor used for presence detection, the system eliminates the need for separate identification devices, thereby reducing system cost while maintaining identification capability
Solution Approach 2:
The system utilizes different magnetic field signal parameters to achieve different functions. The presence of any vehicle is detected through basic magnetic field presence, while vehicle identification is achieved by analyzing unique magnetic field signal characteristics (frequency, amplitude, pattern) generated by each vehicle's magnetic field generator, allowing a single sensor to distinguish between different vehicles
3Measurement precision
If multiple cameras are deployed for each parking grid, then vehicle identification accuracy is improved, but device complexity increases
Solution Approach 1:
The patent replaces the optical/mechanical camera-based identification system with a magnetic field-based detection system. Instead of using cameras that require complex optical systems and image processing, the invention uses magnetic field sensors to detect and identify vehicles through their unique magnetic field signatures, simplifying the system and reducing costs
Solution Approach 2:
The magnetic field sensor is designed to perform multiple functions: both detecting vehicle presence (parking detection) and identifying the vehicle (vehicle identification). By generating unique magnetic field signals from vehicles and detecting these signals with the same sensor used for presence detection, the system eliminates the need for separate identification devices, thereby reducing system cost while maintaining identification capability
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
Enables cost-effective detection and identification of vehicles using a single magnetic field sensing apparatus, reducing the need for multiple cameras and enhancing system performance.
Implementation Method 1
generating a magnetic field signal by a magnetic field generator disposed in the moveable apparatus
Implementation Method 2
measuring magnetic field by a first magnetic field sensor and a second magnetic field sensor of a magnetic field sensing apparatus
Data Source
AI summary
A method for parking detection and identification of moveable apparatus, comprising following steps of: generating a magnetic field signal containing an unique identifier for identifying the moveable apparatus by a magnetic field generator disposed in the moveable apparatus; measuring magnetic field respectively by two magnetic field sensors of a magnetic field sensing apparatus disposed in a moveable-apparatus parking place or its peripheral area, wherein a first and a second magnetic field measurements are measured; and calculating a magnetic field measurement difference for obtaining the unique identifier, wherein the magnetic field measurement difference is a magnitude of a difference of the first and the second magnetic field measurements, or a magnitude of a difference of a first magnetic field component of the first magnetic field measurement along a characteristic direction and a second magnetic field component of the second magnetic field measurement along the characteristic direction.