Interleaved Grille Cover for Pedestrian Warning Sounders
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Solution Overview
Problem
New energy vehicles, such as electric vehicles, are quiet at low speeds, increasing the risk of accidents due to pedestrians not noticing their presence, and existing pedestrian warning devices are vulnerable to external environmental factors and require protection for internal components.
Innovation Solution
A pedestrian warning device with a grille cover featuring interleaving crossbeams in multiple layers that protect internal components while maintaining air permeability and sound diffusion, comprising a housing with reinforcing ribs and a circular or rectangular shape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a grille cover is added to protect internal components, then protection against external environmental factors is improved, but device complexity increases
Solution Approach 1:
The grille cover is divided into multiple layers (first grille layer and second grille layer) with crossbeams arranged in segments. This segmentation provides enhanced protection against external factors while maintaining a relatively simple overall structure that can be manufactured as a modular component.
Solution Approach 2:
The patent employs a nested structure where the first grille layer and second grille layer are positioned one inside another, with crossbeams of different layers interlaced. This nesting approach maximizes protective coverage while minimizing the additional space and complexity required compared to a single-layer design.
2Quantity of substance
If crossbeams are arranged to form gaps for air flow, then air permeability is improved, but protection capability deteriorates
Solution Approach 1:
The grille layers are segmented into multiple crossbeams with gaps between them, allowing air to pass through while maintaining structural protection. The segmentation creates a balance between open area for air flow and solid material for protection.
Solution Approach 2:
The nested arrangement of first and second grille layers with interlaced crossbeams creates a protective structure where gaps in one layer are partially covered by crossbeams of the other layer. This provides protection while maintaining air permeability through the combined gap structure.
3Reliability
If crossbeams of adjacent grille layers are interlaced, then protection capability is improved, but manufacturing complexity increases
Solution Approach 1:
The grille is segmented into discrete crossbeam elements that can be manufactured separately and then assembled into layers. This segmentation allows for standardized production of individual components that can be easily combined to create the interlaced structure.
Solution Approach 2:
The interlaced arrangement of crossbeams from adjacent layers is designed to fit together in a predetermined pattern, where the structure of one layer complements the other. This nested design, while providing enhanced protection, can be manufactured using modular assembly techniques that reduce overall manufacturing complexity.
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 grille cover effectively shields internal components from external disturbances while ensuring air flow and sound propagation, enhancing the durability and performance of the warning device.
Implementation Method 1
the crossbeams of adjacent grille layers are interleave with each other... completely shelters the inner components and parts of the pedestrian warning device
Implementation Method 2
the crossbeams are arranged at intervals so as to form gaps to enable gas to flow between adjacent crossbeams... has little effect on the diffusion of the sound field
Data Source
Figure 1
Figure 2~3
AI summary
A pedestrian warning device, comprises a warning device body having a cavity and an open end portion, and a sound generating device mounted inside the cavity, wherein, the pedestrian warning device further comprises a grille cover arranged on the end portion of the warning device body, the grille cover comprises at least two grille layers spaced at intervals from inside to outside, each of the grille layers comprises a plurality of crossbeams, the crossbeams are arranged at intervals so as to form gaps to enable gas to flow between adjacent crossbeams, and a width of the gaps is not greater than a width of the crossbeams, and the crossbeams of adjacent grille layers are interleave with each other. The grille cover can protect internal components and parts the pedestrian warning device, and will not affect the performance of the pedestrian warning device.