Curved Light Guide Member for Windshield Object Detection
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Solution Overview
Problem
Conventional object detection apparatuses for vehicles face challenges in attaching light guide members to three-dimensional curved windshields, leading to air bubble intrusion and inefficient attachment due to shape mismatches between the windshield and the light guide member, which can result in false object detection and reduced detection performance.
Innovation Solution
A light guide member with a curvature matching the windshield, featuring an incident face, detection face, exiting face, and a light guiding portion, is designed to effectively guide light and reflection light, while an intervening member with a convex shape is used to ensure a bubble-free attachment by matching the curvature of the windshield, enhancing detection accuracy and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional light guide member with a flat contact face is attached to a three-dimensional curved windshield, then the attachment process is simple, but air bubbles intrude between the adhesive and the windshield or between the adhesive and the light guide member, causing false detection and reduced detection performance
Solution Approach 1:
The contact face of the light guide member is designed with a curved shape that corresponds to the curvature of the windshield surface. This curvature matching eliminates gaps between the light guide member and the windshield, preventing air bubble intrusion and ensuring reliable optical contact for accurate object detection.
2Productivity
If a conventional light guide member with a flat contact face is attached to a three-dimensional curved windshield, then the manufacturing process remains straightforward, but attachment work cannot be conducted efficiently due to shape mismatch
Solution Approach 1:
The contact face of the light guide member is designed with a curved shape that corresponds to the curvature of the windshield surface. This curvature matching eliminates gaps between the light guide member and the windshield, preventing air bubble intrusion and ensuring reliable optical contact for accurate object 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 solution ensures accurate detection of objects on the windshield by preventing air bubble intrusion and improving attachment efficiency, leading to enhanced detection performance and reduced false positives.
Implementation Method 1
a light guide member including an incident face where the light exiting from the light source unit enters; a detection face where the exiting light exits to a rear face of the light translucent member and the reflection light reflected from the light translucent member enters; an exiting face where the reflection light exits to the detection unit; and a light guiding portion through which the exiting light and the reflection light proceed
Data Source
AI summary
A light guide member for an object detection apparatus is devised. The object detection apparatus includes a light source unit, and a detection unit for detecting an object adhered on a surface of a light translucent member based on change of light quantity of reflection light received from the light translucent member. The light guide member includes an incident face where the light exiting from the light source unit enters; a detection face where the exiting light exits to a rear face of the light translucent member and the reflection light reflected from the light translucent member enters; an exiting face where the reflection light exits to the detection unit; and a light guiding portion through which the exiting light and the reflection light proceed. The detection face has curvature corresponding to curvature of the light translucent member.