Heated Vehicle Glass Layout for Clear Sensor Acquisition
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Solution Overview
Problem
The acquisition performance of information by information acquisition apparatuses mounted on vehicles is degraded due to streaks caused by waviness of the glass plate and refractive index distribution from electric heating wires, especially when the glass plate is mounted in an inclined state.
Innovation Solution
A glass plate with an electric heating wire design that includes a rectangular information acquisition area with horizontal sides and vertical electric heating wire portions arranged in the lateral direction, reducing waviness-induced distortions by minimizing refractive index variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electric heating wires are provided in the information acquisition area to remove fog or ice, then the anti-fog/ice performance is improved, but perspective distortion and refractive index variations occur that degrade information acquisition performance
Solution Approach 1:
The glass plate is divided into two distinct regions: an information acquisition area where no heating wires are provided to maintain optical clarity for cameras and sensors, and a peripheral area where heating wires are concentrated to provide anti-fog/ice functionality. This spatial segmentation resolves the contradiction by separating the conflicting requirements of optical precision and thermal anti-fog performance.
Solution Approach 2:
Different regions of the glass plate are assigned different functional qualities: the central information acquisition area maintains uniform refractive index and optical properties for precise image capture, while the peripheral regions incorporate heating wires for localized anti-fog/ice treatment. This local differentiation allows each zone to optimize its specific function without compromising the other.
2Productivity
If the glass plate is mounted in an inclined state for vehicle installation, then the aerodynamic performance and rain runoff are improved, but streaks from waviness and refractive index distribution become more pronounced, degrading information acquisition
Solution Approach 1:
The problematic waviness and refractive index variations are effectively 'taken out' from the information acquisition area by concentrating the heating wire-induced thermal effects in peripheral regions only. This extraction ensures that the central area maintains optimal optical properties for information acquisition while the vehicle's inclined mounting angle continues to provide aerodynamic benefits.
Solution Approach 2:
The solution addresses the two-dimensional optical distortion problem by introducing a functional zonation in the plane of the glass plate. By distributing heating wires selectively in peripheral zones rather than uniformly across the surface, the patent creates a dimensional differentiation that preserves optical quality in the central region while maintaining thermal functionality at the edges.
3Reliability
If heating wires are arranged horizontally to follow the inclined mounting position, then the heating coverage is improved, but refractive index variations in the vertical direction cause streaks that degrade image quality
Solution Approach 1:
The heating wire arrangement breaks the symmetry of uniform distribution by concentrating wires in peripheral regions and leaving the central information acquisition area free of heating elements. This asymmetric布局 ensures that thermal effects and associated refractive index variations are confined to edge regions, preventing vertical streaks from forming in the central imaging area while maintaining adequate heating coverage for anti-fog purposes.
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
Improves the performance of information acquisition by reducing perspective distortion and refractive index variations, enhancing the clarity and accuracy of information acquisition.
Implementation Method 1
Electric heating wires generate heat by being supplied with electric power, and remove fog (water droplets) or ice on a surface of the laminated glass
Implementation Method 2
an acquisition performance for information by the information acquisition apparatus may be degraded by streaks caused by waviness of the glass plate and a distribution of refractive index caused by heat generated by the electric heating wire
Data Source
AI summary
A glass plate with an electric heating wire includes a glass plate having an information acquisition area through which information outside a vehicle is acquired by an information acquisition apparatus; and an electric heating wire provided in the information acquisition area. When the glass plate is mounted to a vehicle body in an inclined state, the information acquisition area has a rectangular shape viewed from a direction of an optical axis of the information acquisition apparatus, and has horizontal upper and lower sides. A plurality of streaks caused by waviness of the glass plate are arranged at intervals in a lateral direction parallel to the upper and lower sides, each streak extending in a vertical direction perpendicular to the lateral direction. The electric heating wire has a vertical portion that vertically traverses the information acquisition area. A plurality of vertical portions are provided at intervals in the lateral direction.