Road Power Transmission Coil Guidance for Vehicle Alignment

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Solution Overview

Problem

Vehicles may not be able to drive appropriately on power transmission devices due to driver skill levels or environmental conditions, leading to potential traffic congestion and inefficient power transmission.

Innovation Solution

A power transmission device with multiple coils and a display unit that emits light patterns to guide vehicles, adjusting speed and position to ensure proper alignment and travel, using a control unit to manage the display mode based on vehicle speed and position relative to the coils.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If no guidance system is provided, then the device complexity is low, but vehicles cannot travel appropriately on the power transmission device due to driver skill or environmental conditions

Engineering Contradiction:
Improvevehicle travel guidanceVSAvoiddisplay unit and control system
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

A display unit is introduced as an intermediary between the power transmission device and the driver. This display unit provides visual guidance information (arrows, icons, messages) to help drivers operate vehicles appropriately on the power transmission device, resolving the contradiction by adding a mediating component that improves ease of operation without directly modifying the vehicle or driver

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces mechanical/physical guidance methods (such as road markings or physical barriers) with an optical information system. The display unit uses light-emitting elements to provide guidance information, substituting a mechanical approach with an optical field-based approach that is more flexible and informative

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

2Productivity

If vehicle speed is not controlled, then the power transmission efficiency may be improved by continuous operation, but traffic congestion occurs due to inappropriate vehicle speed

Engineering Contradiction:
Improvepower transmission efficiencyVSAvoidvehicle traveling speed
Core Design Contradiction:
ProductivityVSSpeed

Solution Approach 1:

The control unit receives information about vehicle speed from the vehicle and uses this feedback to adjust the guidance information displayed. When vehicle speed is inappropriate, the control unit changes the display content to guide the driver to adjust speed, creating a closed-loop feedback system that balances power transmission efficiency with traffic flow

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The display unit dynamically changes its output based on real-time vehicle conditions. The guidance information is not static but adapts to the current vehicle speed and operational state, allowing the system to optimize both power transmission efficiency and traffic flow under varying conditions

Inventive Principle:
Principle #15Dynamics

3Ease of manufacture

If the power receiving coil is deviated from the power transmission coils, then the device complexity is reduced, but the power transmission efficiency decreases

Engineering Contradiction:
Improvealignment toleranceVSAvoidpower transmission efficiency
Core Design Contradiction:
Ease of manufactureVSLoss of energy

Solution Approach 1:

The display unit provides guidance information in advance to help drivers position their vehicles correctly before entering the power transmission zone. By providing preliminary alignment guidance through visual indicators, the system ensures proper coil alignment before power transmission begins, maintaining efficiency without requiring complex real-time adjustment mechanisms

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The display unit uses different colors to indicate alignment status and provide guidance. Color changes provide intuitive visual feedback to drivers about their lateral position relative to the power transmission coils, enabling easy correction of alignment without complex mechanical or electronic intervention

Inventive Principle:
Principle #32Color changes

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 effectively promotes vehicle acceleration, reduces traffic congestion, and improves power transmission efficiency by guiding vehicles to maintain proper alignment with the power transmission coils, enhancing the overall travel experience and charging efficiency.

Implementation Method 1

a plurality of power transmission coils 231...configured to transmit electric power in a non-contact manner to a power receiving coil mounted on a vehicle

Methodology Applied
Scientific EffectElectromagnetic induction: Electromagnetic Induction

Implementation Method 2

the display unit emits light in a light emission pattern flowing in a traveling direction of the road

Methodology Applied
Scientific EffectLight emission: Light Emitting Diode

Data Source

PatentUS12135220B2Power transmission device, non-contact power transmission system, and method for controlling power transmission device
Publication Date: 2024.11.05 TOYOTA JIDOSHA KK
  • US12135220B2 patent drawing
  • US12135220B2 patent drawing
  • US12135220B2 patent drawing

AI summary

A power supply system includes a plurality of power transmission coils, a display layer, and a controller. The power transmission coils are arranged in a predetermined direction on a road and configured to transmit electric power in a non-contact manner to a power receiving coil mounted on a vehicle. The display layer is provided above the power transmission coils. The controller controls a display mode of the display layer so as to guide the vehicle in accordance with a traveling state of the vehicle.