LiDAR Reflecting Assembly Asymmetric Angles
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Solution Overview
Problem
Existing LiDAR systems have limited detection field of view and poor detection resolution due to their design, which restricts their ability to effectively detect and process information from a wide area.
Innovation Solution
The LiDAR system incorporates a rotary device with a first and second rotary part that can rotate relative to each other, along with a laser transceiving assembly and a reflecting assembly featuring multiple reflectors with different included angles, allowing for a wider detection field of view and improved detection precision by staggering and overlapping detection fields.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a single reflector is used in the LiDAR system, then the device complexity is reduced, but the detection field of view is limited and detection resolution is poor
Solution Approach 1:
The single reflector is divided into multiple reflectors (first reflector, second reflector, third reflector, etc.) arranged around the rotary axis. Each reflector has a different included angle with the plane perpendicular to the rotary axis, allowing each to cover a specific angular range. This segmentation enables the LiDAR to achieve a wider overall detection field of view while maintaining manageable device complexity through modular configuration.
2Measurement precision
If multiple reflectors with different included angles are used, then detection precision is improved through staggered detection fields, but the device complexity increases
Solution Approach 1:
Each reflector is designed with a specific local quality - a unique included angle relative to the plane perpendicular to the rotary axis. The first reflector has a first included angle, the second reflector has a second included angle, and so on. This local differentiation allows each reflector to cover a specific angular detection range, creating staggered detection fields that overlap to improve detection precision while keeping the overall structure organized around a common rotary axis.
3Area of stationary object
If the reflectors are arranged with equal included angles, then the device structure is simplified, but the detection field coverage is reduced
Solution Approach 1:
The reflectors are arranged asymmetrically around the rotary axis, with each reflector having a different included angle with the plane perpendicular to the rotary axis. This asymmetric arrangement ensures that the detection fields of different reflectors are staggered rather than overlapping completely, maximizing the overall detection field coverage. The asymmetry is systematically managed by connecting adjacent reflectors along the circumferential direction, maintaining structural organization while achieving comprehensive angular coverage.
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 enables a wider detection field of view and higher detection precision compared to traditional LiDAR systems, allowing for more comprehensive object detection and data processing.
Implementation Method 1
each reflector is configured to reflect the emergent laser beam emitted by the laser transceiving assembly to the object and reflect the reflected laser beam reflected back by the object to the corresponding laser transceiving assembly
Data Source
AI summary
The present application discloses a LiDAR and an autonomous driving vehicle. The LiDAR includes a rotary device, a laser transceiving assembly, and a reflecting assembly. The rotary device has a first rotary part and a second rotary part that are configured to rotate relative to each other around a rotary axis. The laser transceiving assembly is connected to the first rotary part and configured to emit an emergent laser beam and receive a reflected laser beam. The reflecting assembly is connected to the second rotary part and has at least two reflectors. The at least two reflectors are arranged around the rotary axis, and at least two of included angles between the reflectors and a plane perpendicular to the rotary axis are different. In the present application, the same reflector can reflect both the emergent laser beam and the reflected laser beam.