Roof Light Panel Press Detection with Warping-Resistant Support
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing detection devices for vehicle roof lights face challenges in accurately detecting presses on wall surfaces due to restricted displacement of the inner wall, which can prevent the pressure-sensitive sensor from responding effectively.
Innovation Solution
A detection device with a panel and support structure that allows the operation surface to deform while preventing warping, featuring sensors positioned between support structures to enhance sensitivity and detect presses on any location, using piezoelectric members and a transmitter to send signals for remote control of illumination switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the sensor is placed on the inner wall surrounded by support structure, then the panel stability is improved, but the pressing force transmission to the sensor deteriorates
Solution Approach 1:
The panel is divided into a rigid support structure portion and a flexible operation surface portion. The support structure provides stability while the operation surface allows deformation for force transmission. This segmentation resolves the contradiction by separating the stabilizing function from the force-transmission function.
Solution Approach 2:
Different regions of the panel have different mechanical properties. The support structure region is rigid for stability, while the operation surface region is flexible for force transmission. This local differentiation allows the panel to simultaneously achieve stability and responsive force transmission.
2Ease of manufacture
If the sensor overlaps the support structure in plan view, then the manufacturing is simplified, but the detection accuracy deteriorates due to restricted displacement
Solution Approach 1:
The sensor is extracted from the support structure area and placed only in the operation surface region. This extraction ensures the sensor is positioned where panel displacement occurs during pressing, improving detection accuracy without complicating manufacturing.
Solution Approach 2:
The sensor positioning is optimized in the plan view dimension by placing it between support structures rather than overlapping them. This dimensional arrangement allows the sensor to detect panel deformation while maintaining simple manufacturing alignment.
3Stability of the object's composition
If the operation surface is made more rigid to prevent warping, then the panel stability is improved, but the sensitivity to pressing operations deteriorates
Solution Approach 1:
The panel is segmented into a rigid support structure for warping prevention and a flexible operation surface for pressing sensitivity. This segmentation allows the panel to simultaneously achieve stability against warping and sensitivity to pressing operations.
Solution Approach 2:
The panel exhibits different rigidity characteristics in different regions: the support structure is rigid to prevent warping, while the operation surface is flexible to respond to pressing. This local quality differentiation resolves the contradiction between stability and sensitivity.
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 enables reliable detection of presses on any panel location, improving sensitivity and accuracy, even on thicker panels, and allows for precise control of light sources through signal comparison and frequency discrimination units.
Implementation Method 1
The sensor can be formed of a piezoelectric member which overlaps and straddles the third support in plan view
Data Source
AI summary
A detection device includes a panel having opposed main surfaces including an operation surface and a rear surface. A support structure is located on at least one of the main surfaces and prevents warping of the panel while permitting the operation surface to be deformed in response to a pressing operation applied to the operation surface. A sensor for sensing the pressing operation applied to the operation surface is provided on one of the main surfaces at a location where at least a portion of the sensor does not overlap the support structure in plan view.