Wiper Blade Condition Detection via Motor Current Analysis
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Solution Overview
Problem
The service life of windshield wiper blades is significantly reduced by environmental factors, leading to ineffective wiping and increased noise, necessitating a reliable method to determine the optimal time for replacement.
Innovation Solution
A method that analyzes the windshield wiper movement patterns, specifically jerky movements, to evaluate the condition of the wiper blade by detecting fluctuations in operating parameters such as power consumption and load conditions, allowing for timely prognosis of blade aging and replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If the wiper blade is used for extended periods to maximize service life, then the duration of action increases, but the reliability deteriorates due to aging effects like UV radiation and extreme weather conditions
Solution Approach 1:
The system performs preliminary detection of wiper blade condition by monitoring jerky movements during operation. The evaluation device analyzes movement patterns and detects aging signs before complete failure occurs, enabling proactive replacement scheduling that maximizes service life while maintaining reliability.
2Reliability
If the wiper blade is replaced frequently to maintain reliability, then the reliability is improved, but the loss of time for replacement increases
Solution Approach 1:
The system implements continuous feedback monitoring of wiper blade condition through the evaluation device that analyzes jerky movements. This feedback mechanism provides real-time information about blade aging, enabling replacement only when actually needed rather than on fixed schedules, thus reducing unnecessary replacement time while maintaining reliability.
3Measurement precision
If complex detection systems are used to accurately assess wiper blade condition, then the measurement precision improves, but the device complexity increases
Solution Approach 1:
The wiper blade condition assessment system utilizes the wiper motor's existing operating parameters (current, speed) to self-diagnose blade condition. The evaluation device detects jerky movements through standard motor measurements without requiring separate sensors or complex external monitoring equipment, achieving precise measurement while keeping the system simple.
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
This approach provides a reliable and easy-to-implement evaluation of wiper blade condition, enhancing operational safety by informing users of potential issues before they affect vehicle visibility and safety.
Implementation Method 1
the movement of the windshield wiper is derived from an operating parameter of the electric motor
Implementation Method 2
the occurrence of jerky movements during the wiping process
Data Source
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AI summary
The method involves detecting the movement of a windscreen wiper by measuring an operating parameter of an electric motor. The condition of a wiper blade (111), is evaluated on the basis of the analysis of the windscreen wiper movement. The current consumption of the electric motor, is measured. Independent claims are also included for: (1) a device for determining the condition of a wiper blade by an electric windscreen wiper; and (2) a windscreen wiper system for a vehicle.