Roof-Edge LiDAR Mounting Structure to Avoid Near-Field Blocking
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Solution Overview
Problem
The detection range of LiDAR devices embedded in vehicle bumpers is often blocked by objects such as pedestrians or motorcycles, affecting surrounding object recognition.
Innovation Solution
A long-range LiDAR device is mounted on the peripheral edge of a vehicle's roof, with a detection range expanding diagonally downward, having a lower limit of detection distance between 10 cm and 1 m, and a mounting height of at least 1.8 m to minimize blocking, even when objects are close proximity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a LiDAR device is embedded in the bumper portion of a vehicle, then the device can be easily mounted and integrated into the vehicle structure, but the detection range is greatly blocked when objects such as pedestrians or motorcycles are in close proximity of the bumper portion
Solution Approach 1:
The LiDAR device is mounted on the roof peripheral edge portion rather than the bumper portion, changing the spatial dimension from low (bumper level) to high (roof level). This dimensional change allows the detection range to expand diagonally downward, avoiding blockage by objects in close proximity to the bumper while maintaining ease of mounting through standardized roof mounting interfaces
2Device complexity
If a LiDAR device is mounted at a low position on the vehicle, then the mounting structure is simple and compact, but the detection range is blocked by objects in close proximity to the vehicle
Solution Approach 1:
The LiDAR device is positioned at a high mounting position on the roof peripheral edge, changing from low-position mounting to high-position mounting. This allows the detection range to cover areas that would be blocked at lower positions, while the mounting structure remains relatively simple using standard roof mounting brackets and fixtures
Solution Approach 2:
The LiDAR device is specifically positioned at the peripheral edge portion of the roof, creating a localized optimal mounting position that maximizes detection coverage. This local quality optimization ensures that the detection range is not blocked by the vehicle body or objects in close proximity, while maintaining overall structural simplicity
3Ease of manufacture
If a narrow-angle LiDAR device is used, then the device is readily procurable and cost-effective, but the detection area coverage is limited
Solution Approach 1:
By mounting the narrow-angle LiDAR device on the roof peripheral edge and orienting it to expand detection diagonally downward, the effective detection area is maximized. The high mounting position allows the narrow detection cone to cover a larger ground area compared to low-position mounting, achieving adequate coverage without requiring expensive wide-angle devices
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 configuration prevents significant blocking of the detection range, allowing for effective detection of objects on the road surface, including small objects and reducing the need for close-range LiDAR devices, thereby reducing costs and improving detection precision.
Implementation Method 1
a long-range light detection and ranging (LiDAR) device mounted on a peripheral edge portion of a roof of the vehicle
Implementation Method 2
the long-range LiDAR device having a lower limit of detection distance that is not less than 10 cm and not more than 1 m
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3A~3B
AI summary
A vehicle sensor mounting structure includes a vehicle (1); and a long-range light detection and ranging (LiDAR) device (10, 11) mounted on a peripheral edge portion of a roof (1a) of the vehicle (1), the long-range LiDAR device having a detection range (Ra, Rc) expanding diagonally downward as viewed from the roof (1a), the detection range (Ra, Rc) including a part of an outer peripheral face (1b, 1c) of the vehicle (1), the long-range LiDAR device being configured to detect an object (50, 60) within the detection range (Ra, Rc), and the long-range LiDAR device having a lower limit of detection distance that is not less than 10 cm and not more than 1 m.