Optical Surface Contaminant Detection via Light Transmission
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Solution Overview
Problem
Existing systems lack an efficient and automated method for detecting and remediating contaminants such as dirt, water, and oil on vehicle windows, which can obstruct visibility and require manual intervention or inefficient cleaning processes.
Innovation Solution
An automated system equipped with a light source and detector adjacent to the optical surface, which introduces light and measures changes in light reflection to trigger cleaning actions, such as wiper blade operation or fluid application, based on the type of contaminant identified, using a controller to compare light values to thresholds and initiate appropriate remediation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual cleaning intervention is used for contaminants on vehicle windows, then cleaning can be performed, but labor cost and time consumption increase
Solution Approach 1:
The system enables self-service cleaning by automatically detecting contaminants and triggering appropriate cleaning actions without human intervention. The controller monitors light transmission through the window, identifies contaminant presence and type, and autonomously activates wiper blades, fluid dispensers, or heating elements to clean the window surface.
Solution Approach 2:
The system implements continuous feedback by measuring light transmission through the window and comparing it to threshold values. When light transmission drops below the threshold indicating contaminant presence, the system triggers cleaning actions and continues monitoring until light transmission improves, creating a closed-loop control system that responds dynamically to window conditions.
2Reliability
If generic cleaning methods are used for all contaminants, then cleaning can be performed, but cleaning effectiveness decreases for specific contaminant types
Solution Approach 1:
The system applies different cleaning treatments based on the specific contaminant type detected. Water contaminants trigger wiper blade activation, oily contaminants trigger fluid dispenser activation, and frozen contaminants trigger heater activation. This localized response strategy matches the cleaning method to the contaminant type, maximizing cleaning effectiveness for each specific situation.
Solution Approach 2:
The system changes the cleaning approach parameters based on contaminant identification. Different contaminants have different optical properties that the system detects using light transmission measurements at various wavelengths. Based on which wavelength shows the greatest reduction in transmission, the system determines contaminant type and adjusts cleaning parameters accordingly.
3Extent of automation
If automated detection systems are implemented, then manual intervention is reduced, but system complexity increases
Solution Approach 1:
The system uses a single light transmission measurement mechanism to perform multiple functions: detecting contaminant presence, identifying contaminant type through wavelength analysis, and triggering appropriate cleaning actions. This multi-functional approach reduces the need for separate specialized sensors and control systems for each contaminant type, managing complexity while maintaining high automation capability.
4Measurement precision
If light transmission measurement is used to detect contaminants, then detection is achieved, but detection precision must be maintained against varying light conditions
Solution Approach 1:
The system uses periodic light transmission measurements at multiple wavelengths to detect contaminants. By measuring at different wavelengths and comparing the differential changes in transmission, the system can distinguish between actual contaminants and variations in ambient lighting conditions. This periodic multi-wavelength measurement approach filters out external light interference while maintaining sensitive contaminant detection.
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 detects and responds to contaminants by automatically triggering cleaning actions, improving visibility and reducing the need for manual maintenance by identifying and addressing specific types of contaminants like water, dirt, and oil with targeted remediation.
Implementation Method 1
The controller is configured to introduce light from the at least one light source into the optical surface, and to measure light at the edge of the optical surface with the at least one detector
Implementation Method 2
the detector may be a spectrophotometer. Light measured by the spectrophotometer may be analyzed, and the type of contaminant on the optical surface may be identified based on the analyzed light
Data Source
AI summary
A vehicle and/or a method for detecting contaminants on an optical surface are provided. The vehicle includes at least one light source adjacent the optical surface and at least one light detector at an edge of the optical surface. A controller is configured to introduce light from at least one light source into the optical surface, and to measure light at the edge of the optical surface with at least one detector. The controller compares the measured light to a threshold, and, if the measured light crosses the threshold, triggers or implements a response action.