Light Guide Member Adhesive Segmentation for Vehicle Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional object detection apparatuses for vehicles with three-dimensional curved windshields face issues with air bubbles and detection precision due to the deformation of flexible adhesive sheets under inertia forces, leading to false detection of objects like raindrops.
Innovation Solution
A light guide member with a detection face featuring a detection area and a non-detection area, where the first intervening member with higher flexibility is attached to the curved windshield via a flexible adhesive, and the second intervening member with lower flexibility is attached to the non-detection area, ensuring secure contact and minimizing relative position deviations during vehicle acceleration or vibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a flexible adhesive sheet is used to attach the light guide member to the curved windshield, then the ease of operation and adaptability to curved surfaces is improved, but the stability of the light guide member's position deteriorates due to deformation under inertia forces
Solution Approach 1:
The adhesive sheet is divided into a first adhesive sheet with higher flexibility for the detection area and a second adhesive sheet with lower flexibility for the non-detection area, allowing each segment to serve its specific function while collectively solving the contradiction between ease of attachment and position stability
Solution Approach 2:
Different regions of the adhesive system are assigned different flexibility characteristics - the first adhesive sheet in the detection area has higher flexibility to conform to curved surfaces, while the second adhesive sheet in the non-detection area has lower flexibility to maintain positional stability under inertia forces
2Measurement precision
If the area of the adhesive sheet is enlarged to increase detection area, then the detection sensitivity is improved, but the deformation under inertia forces increases leading to greater position deviation
Solution Approach 1:
The enlarged adhesive sheet is divided into regions with different flexibility characteristics - the first adhesive sheet in the detection area allows for larger area to improve detection sensitivity, while the second adhesive sheet in the non-detection area maintains lower flexibility to minimize position deviation under inertia forces
3Reliability
If a rigid adhesive material is used to prevent deformation, then the position stability is improved, but the ability to conform to curved surfaces and eliminate air bubbles deteriorates
Solution Approach 1:
The adhesive system is segmented into two distinct adhesive sheets with different rigidity characteristics, allowing the first adhesive sheet to provide conformability for eliminating air bubbles while the second adhesive sheet provides rigidity for position stability
Solution Approach 2:
Different regions require different mechanical properties - the first adhesive sheet in the detection area has higher flexibility to conform to curved surfaces and eliminate air bubbles, while the second adhesive sheet in the non-detection area has lower flexibility to maintain position stability
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 configuration enhances detection precision by preventing air bubbles and maintaining the relative position of the light guide member, reducing false object detection and improving the sensitivity of adhered object detection.
Implementation Method 1
The first intervening member has flexibility greater than flexibility of the second intervening member
Implementation Method 2
a light guide member made of translucent material, disposed between the light translucent member (e.g., windshield), and the light source and the detection unit to guide light exiting from the light source and reflection light reflected from an object
Implementation Method 3
a detection unit such as a light receiving element to receive reflection light reflected from the object and to detect the object based on change of light quantity of the received reflection light
Data Source
AI summary
A light guide member for an object detection apparatus for detecting an object adhered on a light translucent member based on change of quantity of reflection light received from the light translucent member includes a detection face where light exits to the light translucent member and reflection light reflected from the light translucent member enters, the detection face including a detection area where a part of the reflection light to enter the detection unit passes through, and a non-detection area where remaining part of the reflection light not to enter the detection unit passes through; a first intervening member disposed on the detection face attachable to the light translucent member via the first intervening member; and a second intervening member disposed on the detection face attachable to the light translucent member via the second intervening member. The first intervening member has flexibility greater than flexibility of the second intervening member.