Shaped Block with Varying Stud Heights for Angle-Independent Noise
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Solution Overview
Problem
Existing shaped blocks do not effectively generate a consistent and intense rolling noise that is independent of the overtravel angle, which can lead to reduced visibility and safety, especially for cyclists.
Innovation Solution
The shaped block design features a top surface with knobs of varying heights, arranged in specific patterns and configurations to create a profiling that intensifies rolling noise regardless of the angle of approach, including alternating rows of low and high knobs, and strategically placing knobs to enhance noise generation at different edges and regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If studs of uniform height are used on the shaped block, then the manufacturing process is simple, but the rolling noise generated is insufficient and dependent on driving angle
Solution Approach 1:
The patent applies local quality by varying the height of studs in specific local areas rather than using uniform height throughout. The top surface includes studs with at least two different heights, where certain studs protrude higher than others. This local variation in stud height creates different noise intensities at different locations, ensuring that rolling noise is generated effectively regardless of the driving angle, thereby resolving the contradiction between noise intensity and manufacturing simplicity.
2Object-generated harmful factors
If studs are arranged in a simple pattern, then the manufacturing is easier, but the rolling noise varies significantly with driving angle
Solution Approach 1:
The patent employs asymmetry in the stud arrangement by creating patterns where studs of different heights are positioned asymmetrically relative to each other. This asymmetric distribution ensures that regardless of the driving angle, the vehicle wheel will encounter studs of varying heights, generating consistent rolling noise. The asymmetric pattern is designed to be manufacturable while achieving the goal of angle-independent noise generation.
3Object-generated harmful factors
If all studs have the same height, then the production cost is lower, but the visibility and safety attention for cyclists is reduced
Solution Approach 1:
The patent uses local quality differentiation by implementing studs with at least two different heights on the top surface. This local variation creates more pronounced rolling noise that is independent of driving angle, thereby enhancing visibility and safety attention for cyclists and other road users. The differentiated stud heights are strategically positioned to maximize noise generation while maintaining reasonable 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 design generates a more intense and consistent rolling noise that is independent of the overtravel angle, increasing visibility and safety by ensuring the shaped block is noticeable from any direction, with specific noise patterns adaptable to different vehicle types.
Implementation Method 1
a more intense rolling noise is generated that is largely independent of the driving angle
Data Source
Figure 1a~1b
Figure 1c
Figure 2
AI summary
A shaped block (101), wherein the shaped block (101) comprises a first upper longitudinal edge (102) and a second upper longitudinal edge (103), wherein these longitudinal edges (102, 103) are opposite each other, wherein the shaped block (101) comprises a top surface (104) arranged between these longitudinal edges (102, 103), wherein the shaped block (101) comprises a set (M-105) of studs (105), and wherein the studs (105) are arranged on the top surface (104) and form a profile (106), wherein the studs (105, 105a-105e) of a first subset (TM1-105) of the set (M-105) have a first stud height (H1-105), and wherein the studs (105; 105f-105i) of a second subset (TM2-105) of the set (M-105) have a second stud height (H2-105) and wherein the first stud height (H1-105) is at least 2 mm lower than the second stud height (H2-105).