Radio Wave Reflector With Mechanical Phase Adjustment
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Solution Overview
Problem
Existing radio wave reflectors for high-frequency bands struggle to expand communication coverage areas due to high straightness, leading to coverage holes and increased costs from installing multiple base stations, and existing phase-adjustable reflectors complicate manufacturing and require power maintenance.
Innovation Solution
A reflection apparatus with separated first and second devices allows adjustable phase control through mechanical displacement, reducing manufacturing costs and eliminating the need for power maintenance, while expanding phase change amounts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a camera is positioned at a lower location to capture a driver's face, then the driver's face can be captured, but the camera may capture unwanted elements such as the steering wheel or dashboard
Solution Approach 1:
The reflective surface is positioned at a specific location (lower than the camera) to create a localized reflection zone that captures only the driver's face. This local positioning allows the system to selectively capture the desired area while excluding unwanted elements through the geometric properties of the reflection path.
Solution Approach 2:
A reflective surface acts as an intermediary between the camera and the driver's face. Instead of the camera directly capturing the face, it captures the reflection of the face in the reflective surface, which serves as a mediator to achieve the desired capture while avoiding direct line-of-sight constraints and unwanted background elements.
2Object-generated harmful factors
If a camera is positioned at a higher location to avoid capturing unwanted elements, then unwanted elements are excluded, but the driver's face may not be fully captured
Solution Approach 1:
The reflective surface positioned below the camera serves as an intermediary that redirects the optical path. This allows the camera to be positioned at a higher location (avoiding unwanted elements) while still capturing the driver's face through the reflection, effectively decoupling the camera position from the capture geometry.
Solution Approach 2:
The system introduces a vertical dimension to the optical path by using a reflective surface positioned below the camera. This dimensional change allows light to travel from the driver's face down to the reflective surface and then back up to the camera, enabling high-position camera placement while maintaining face capture capability.
3Ease of operation
If a reflective surface is positioned below the camera to capture the driver's face, then the driver's face can be captured with the camera in a high position, but the installation space requirement increases
Solution Approach 1:
The reflective surface can be implemented as a thin film or flexible reflective element that can be mounted on existing vehicle surfaces such as the dashboard or windshield. This thin-film approach minimizes the volume required for installation while maintaining the reflective functionality needed for face capture.
Solution Approach 2:
The reflective surface is designed to serve multiple functions: it acts as a reflective element for face capture, can be integrated into existing vehicle interior surfaces, and may serve aesthetic or functional purposes in the vehicle interior. This multi-functionality reduces the need for dedicated installation space.
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 apparatus effectively expands communication coverage without additional base stations, reducing installation costs and enhancing phase control for high-frequency radio waves.
Implementation Method 1
positioned a reflective surface below the camera to reflect an image of the driver's face
Data Source
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AI summary
A reflection apparatus which reflects a radio wave includes a first device and a second device which are provided along an emission direction of a reflected wave, the first device includes a plurality of first units each including a first base body which has a first surface and a second surface provided along the emission direction of the reflected wave, a first element which is provided on the first surface, and a second element which is provided on the second surface to be shifted in position from the first element in the emission direction of the reflected wave, the second device includes a plurality of second units each including a second base body which has a third surface and a fourth surface provided along the emission direction of the reflected wave, a third element which is provided on the third surface, and a fourth element which is provided on the fourth surface, and the first device is provided separated from the second device, and a relative positional relationship between the first device and the second device in a direction along the second surface is adjustable.