Autonomous Vehicle Window Cleaning via Ultrasonic Vibration

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Solution Overview

Problem

Decentralized car sharing concepts face challenges in maintaining the energy supply, maintenance, and cleanliness of autonomous vehicle fleets, leading to increased personnel costs and risks of vehicle breakdowns, as they require a minimum number of vehicles to be ready for use at all times.

Innovation Solution

A service station equipped with a robotic arm and ultrasonic emitter for autonomous window cleaning, which uses ultrasonic vibrations to detach dirt from vehicle windows, supported by tools for applying and removing washing liquids, ensuring efficient and thorough cleaning of multiple vehicles without human intervention.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If employees are used to clean fleet vehicles, then cleaning quality is improved, but personnel costs increase

Engineering Contradiction:
Improvecleaning qualityVSAvoidpersonnel costs
Core Design Contradiction:
ReliabilityVSQuantity of substance

Solution Approach 1:

The cleaning system performs autonomous window cleaning without human intervention. The robotic arm with ultrasonic emitter and cleaning tools automatically cleans vehicle windows, eliminating the need for employee labor while maintaining consistent cleaning quality across all fleet vehicles.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The patent replaces manual mechanical cleaning with an automated robotic system. The robotic arm manipulates cleaning tools with ultrasonic vibration technology, substituting human physical labor with automated mechanical systems that reduce operational costs.

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

2Quantity of substance

If users are prompted to carry out service trips, then personnel costs are reduced, but vehicle breakdown risk increases

Engineering Contradiction:
Improvepersonnel costsVSAvoidvehicle breakdown risk
Core Design Contradiction:
Quantity of substanceVSReliability

Solution Approach 1:

The system enables autonomous self-service cleaning where vehicles automatically receive cleaning services at service stations. This eliminates reliance on user-initiated service trips while ensuring vehicles maintain operational readiness through automated maintenance scheduling and execution.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The cleaning system performs maintenance actions before vehicles are needed for service. By proactively cleaning windows and maintaining vehicles in advance, the system ensures vehicles are always ready for deployment without requiring user intervention or creating breakdown risks.

Inventive Principle:
Principle #10Preliminary action

3Device complexity

If traditional cleaning methods are used, then equipment complexity is low, but cleaning efficiency decreases

Engineering Contradiction:
Improveequipment complexityVSAvoidcleaning efficiency
Core Design Contradiction:
Device complexityVSProductivity

Solution Approach 1:

The patent employs ultrasonic vibration technology where the emitter generates high-frequency vibrations to detach dirt from window surfaces. This mechanical vibration approach significantly improves cleaning efficiency compared to traditional methods while the modular robotic system keeps complexity manageable.

Inventive Principle:
Principle #18Mechanical vibration

Solution Approach 2:

The robotic cleaning system is designed with universal applicability across different vehicle types and window configurations. The robotic arm can adapt to various vehicle geometries, and the cleaning tools handle multiple cleaning tasks (window cleaning, drying, polishing), improving overall productivity without proportionally increasing complexity.

Inventive Principle:
Principle #6Universality (Multi-functionality)

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 autonomous service station reduces personnel costs and ensures consistent vehicle availability by enabling efficient, thorough, and autonomous window cleaning of autonomous fleet vehicles, minimizing the risk of accidents due to dirty windows and maintaining vehicle readiness.

Implementation Method 1

The at least one service module has a robot arm, in particular a multi-articulated robot arm, with at least one tool for cleaning the window arranged on it, which has at least one ultrasonic emitter

Methodology Applied
Scientific EffectUltrasonic vibration: Ultrasonic Vibration

Data Source

PatentEP3736182B1Service station for cleaning a vehicle window and method for operating the service station
Publication Date: 2021.12.29 VOLKSWAGEN AG
  • EP3736182B1 patent drawingFigure 1~2
  • EP3736182B1 patent drawingFigure 3(A)~3(B)
  • EP3736182B1 patent drawingFigure 4

AI summary

The invention relates to a service station (90) for the vehicles (10) of an autonomous vehicle fleet, wherein the service station (90) according to the invention comprises at least one service module (95) designed for autonomously performing windshield cleaning on the vehicle (10). The service module has at least one robot arm (951, 952) on which a tool (100) for windshield cleaning is arranged. The tool (100) has an ultrasonic emitter (101), at least one means for applying a cleaning fluid (101), and at least one means for removing a cleaning fluid (103). The invention further relates to a method for operating such a service station (90) according to the invention.