Wireless Charging Road Control for Foreign Object Detection
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Solution Overview
Problem
Wireless charging efficiency for autonomous driving vehicles is compromised by foreign objects on the road surface and requires adaptation to driving speed and environmental temperature.
Innovation Solution
An apparatus with sensors to detect foreign objects and adjust wireless charging transmitters accordingly, along with a controller to manage communication with a management server for activating or deactivating transmitters and determining optimal resonant frequencies based on driving speed and temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless charging transmitters are continuously activated on the road surface, then wireless charging service availability is maintained, but foreign objects may cause safety hazards and energy waste
Solution Approach 1:
The system performs preliminary detection of foreign objects on the road surface using sensors before activating wireless charging transmitters. This advance detection prevents energy waste and safety hazards by identifying foreign objects before charging operations begin, allowing the system to avoid activating transmitters over contaminated areas.
Solution Approach 2:
The system continuously monitors the road surface for foreign objects during charging operations and dynamically adjusts transmitter activation based on detected conditions. When foreign objects are detected, the system provides feedback to deactivate affected transmitters, preventing energy waste and potential safety issues while maintaining charging service in clean areas.
2Ease of operation
If wireless charging is performed while the vehicle is driving at various speeds, then charging convenience is improved, but charging efficiency varies with driving speed and temperature
Solution Approach 1:
The system dynamically adjusts the resonant frequency of wireless charging transmitters based on the vehicle's driving speed and road surface temperature. As the vehicle moves at different speeds or environmental temperatures change, the system modifies operating parameters in real-time to maintain optimal charging efficiency while preserving the convenience of mobile charging.
Solution Approach 2:
The system changes key operating parameters including resonant frequency and power transmission levels according to detected driving conditions such as vehicle speed and temperature. By adjusting these parameters adaptively, the system maintains high charging efficiency across varying operational conditions while keeping the charging process convenient and automatic.
3Area of stationary object
If multiple wireless power transmitters are deployed along the charging road, then charging coverage is expanded, but identifying and managing specific transmitters affected by foreign objects becomes more complex
Solution Approach 1:
The charging road is divided into multiple independent transmitter zones, each with unique identification. When foreign objects are detected, the system can precisely identify which specific transmitter or transmitters are affected and deactivate only those segments, rather than managing the entire system as one unit. This segmentation simplifies foreign object management while maintaining broad charging coverage.
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
Enhances wireless charging efficiency by ensuring foreign objects are detected and transmitters are managed appropriately, while optimizing power generation based on driving conditions, thereby maintaining reliable charging during vehicle operation.
Implementation Method 1
a sensor configured to detect at least one foreign object (FO) present on a wireless charging road
Implementation Method 2
a wireless charger including a plurality of wireless power transmitters
Implementation Method 3
determine a resonant frequency for wireless charging, based on at least one of a driving speed of the wireless charging vehicle, a road surface temperature of the wireless charging road, an air temperature around the wireless charging road
Data Source
AI summary
An apparatus for wireless charging, and a method therefor are provided. The apparatus includes: a sensor to detect at least one foreign object (FO) present on a wireless charging road or detect a location of a wireless power receiver of a vehicle; a transceiver to transmit and receive messages to and from a management server that manages the wireless charging road; and a controller to control the sensor and the transceiver. The controller identifies at least one of wireless power transmitters of a wireless charger corresponding to a location where the foreign object (FO) present on the wireless charging road was detected; and deactivates the identified wireless power transmitter.