Asymmetrical Sensor Housing Drag Reduction
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Solution Overview
Problem
Conventional sensor housings for vehicles, especially those with spherical curvature, experience significant drag and air flow disruption, leading to increased fuel consumption and wind noise, which negatively impact vehicle performance and occupant experience.
Innovation Solution
The development of a sensor housing with an asymmetrical lateral cross-section, featuring a combination of substantially spherical and non-spherical curvatures, along with strategically placed indentations on the exterior surface, which reduces drag by modifying air flow characteristics and optimizing the housing's rotational speed and positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a spherical curvature housing is used, then the housing provides complete coverage and protection, but it experiences significant drag and air flow disruption
Solution Approach 1:
The patent applies asymmetry by transitioning from a spherical curvature housing to an asymmetrical lateral cross-section housing. The asymmetrical design creates different surface profiles on opposite sides of the housing, allowing air to flow more smoothly over the structure. This reduces drag and air flow disruption while maintaining protective coverage, directly resolving the contradiction between complete coverage and aerodynamic performance.
Solution Approach 2:
The patent modifies the curvature characteristics by replacing the uniform spherical curvature with an asymmetrical cross-section that incorporates varying curvature radii. The housing includes a first portion with a first curvature radius and a second portion with a second curvature radius, where the radii differ to optimize air flow. This controlled use of curvature reduces drag while maintaining the protective enclosure function.
2Object-affected harmful factors
If the housing surface is smooth, then manufacturing is easier, but air flow disruption increases leading to higher wind noise
Solution Approach 1:
The patent applies local quality by introducing indentations at specific locations on the housing surface rather than making the entire surface complex. These localized indentations are strategically positioned to modify air flow characteristics and reduce wind noise, while the majority of the housing surface remains relatively simple for easier manufacturing. This selective modification resolves the contradiction between noise reduction and manufacturing ease.
3Use of energy by moving object
If the housing is positioned to minimize drag, then fuel efficiency improves, but the sensor field-of-view may be compromised
Solution Approach 1:
The asymmetrical lateral cross-section is specifically designed to optimize air flow while accommodating sensor requirements. By creating an asymmetric profile rather than a symmetric one, the housing can be oriented to present a more aerodynamic profile to oncoming air, reducing drag and improving fuel efficiency. Simultaneously, the asymmetric design allows for strategic placement of sensors in positions that maintain adequate field-of-view coverage, resolving the contradiction between drag reduction and sensor functionality.
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
This design significantly reduces air resistance and wind noise, resulting in improved fuel efficiency and a more comfortable vehicle experience by minimizing drag forces on the sensor housing and the vehicle as a whole.
Implementation Method 1
a length of the elongated portion is inversely proportional to an amount of drag on the housing
Implementation Method 2
air flow characteristics of air impinging on an exterior surface of the sensor housing
Data Source
AI summary
Described herein are aerodynamically enhanced sensor housings. An aerodynamically enhanced sensor housing has an asymmetrical lateral cross-section that includes a first portion having a substantially spherical curvature and a second portion having a non-spherical curvature. The second portion having the non-spherical curvature may be elongated in relation to the first portion. An aerodynamically enhanced housing can also include one or more indentations formed in an exterior surface thereof to further enhance drag reducing characteristics of the housing. In addition, air flow characteristics around the sensor housing during vehicle operation can be assessed and a drag reduction protocol can be generated and implemented to further enhanced the drag reducing characteristics of the sensor housing.