Wiper System with Dynamic Blade Angle Control
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Solution Overview
Problem
Conventional wiper systems face difficulties in effectively cleaning windshields with complex surface shapes due to varying curvature radii, which can compromise cleaning quality and driver visibility.
Innovation Solution
A wiper system equipped with a wiper arm, a first electrical motor for swinging the wiper arm, a second electrical motor for adjusting the wiper blade's angle, and a sensor to control the blade's rotation, ensuring it remains substantially perpendicular to the windshield surface, even on complex surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional wiper system with a fixed wiper blade angle is used, then the structure is simple, but the cleaning quality deteriorates on windshields with complex surface shapes and varying curvature radii
Solution Approach 1:
The wiper blade angle is changed from fixed to dynamically adjustable. A second electrical motor rotates the wiper blade around the wiper arm axis to adapt the blade angle to the local surface curvature, enabling effective cleaning of complex windshield surfaces while maintaining reasonable system complexity through controlled dynamic adjustment.
Solution Approach 2:
The system changes the operational parameter of the wiper blade angle dynamically. Based on sensor feedback about the windshield surface curvature, the control unit adjusts the rotation angle of the wiper blade to match the local surface geometry, thereby optimizing cleaning quality across varying surface shapes.
2Manufacturing precision
If the wiper blade angle is dynamically adjusted to match surface curvature, then cleaning quality on complex surfaces is improved, but the system complexity increases due to additional motors and sensors
Solution Approach 1:
A sensor detects the actual windshield surface curvature or position, and this information is fed back to the control unit. The control unit processes this feedback and adjusts the wiper blade angle accordingly, creating a closed-loop control system that adapts to surface variations while maintaining cleaning quality.
Solution Approach 2:
The manual or mechanical angle adjustment mechanism is replaced with an electrical motor system. The second electrical motor, controlled electronically based on sensor feedback, provides precise and adaptable angle adjustment without complex mechanical linkages, reducing overall mechanical complexity while achieving the desired adaptability.
3Adaptability or versatility
If a single wiper motor is used, then the system is simple and cost-effective, but it cannot adapt to varying windshield curvatures
Solution Approach 1:
The wiper system is segmented into two independent motor functions: the first electrical motor controls the wiper arm swing motion, while the second electrical motor independently controls the wiper blade rotation angle. This segmentation allows each motor to perform a specific function, achieving surface adaptability without requiring a completely complex new drive system.
Data Source
AI summary
The present invention proposes a wiper system being capable of ensuring wiping quality for the windshields with complex surfaces. The wiper system comprises: a wiper arm (19), on which a wiper blade (12) for cleaning a surface (16) of an object to be cleaned is provided; a first electrical motor (1) driving the wiper arm (19) to swing; a second electrical motor (9); a sensor (13) measuring a parameter representing the position of the wiper arm on the object to be cleaned; a control unit (7) receiving said parameter from said sensor (13) and utilizing said parameter to control the rotation angle of the an output shaft (18) of the second electrical motor (9), such that the output shaft (18) drives rotate the wiper blade (12) under control to change the rotation angle of the central plane of the wiper blade with respect to the wiper arm. The present invention also proposes a vehicle comprising said wiper system.