Multi-line Lidar Vertical Resolution via Focal Plane Board Segmentation
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Solution Overview
Problem
Existing multi-line lidars have limitations in vertical resolution due to the complexity and size of emitting circuit devices, which restrict the number of laser emitters that can be stacked in a small space, affecting their ability to accurately measure distance and position.
Innovation Solution
A multi-line lidar system with a laser emitter comprising multiple boards arranged on the focal plane of an optical collimating unit, allowing for increased vertical resolution without reducing the thickness of the emitting boards, achieved by optimizing the arrangement and collimation of outgoing laser beams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of laser emitters is increased to improve vertical resolution, then the vertical resolution is improved, but the device complexity and size increase
Solution Approach 1:
The laser emitter is divided into multiple independent laser emitting boards, each capable of emitting laser beams. This segmentation allows the system to achieve high vertical resolution through multiple distributed emitters rather than one complex emitter, reducing the complexity of individual emitting circuit devices while maintaining overall system performance.
Solution Approach 2:
The patent transitions from stacking laser emitters in the vertical direction to arranging multiple laser emitting boards on a two-dimensional focal plane. This dimensional change allows simultaneous accommodation of multiple emitters without increasing vertical thickness, thereby improving vertical resolution through spatial distribution rather than vertical stacking.
2Measurement precision
If more laser emitters are stacked in a small space to increase the number of laser beams, then the vertical resolution is improved, but the device size and complexity increase
Solution Approach 1:
The patent arranges multiple laser emitting boards on a two-dimensional focal plane rather than stacking them vertically. This dimensional transformation enables the system to accommodate more laser beams within the same vertical space constraint, improving vertical resolution without increasing the overall device volume.
Solution Approach 2:
The patent uses multiple copies of laser emitting boards distributed on the focal plane to generate multiple laser beams. Each board is a replicated unit that contributes to the overall beam output, allowing the system to achieve high vertical resolution through distributed copying rather than complex single-emitter design.
3Measurement precision
If the number of stacked laser emitters per unit area is increased, then the vertical resolution is improved, but the device complexity increases
Solution Approach 1:
The emitting system is segmented into multiple independent laser emitting boards, each with its own simplified emitting circuit. This segmentation distributes the complexity across multiple simple units rather than concentrating it in one complex emitter, enabling high vertical resolution through numerical multiplication of simple components.
Solution Approach 2:
The patent redistributes laser emitters from a vertical stacking arrangement to a two-dimensional focal plane arrangement. This dimensional change increases the effective number of emitters per unit area without proportionally increasing device complexity, as each emitter on the focal plane operates independently with simplified circuitry.
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 maximizes the use of focal plane space, increasing the number of outgoing laser beams in the vertical direction, thereby enhancing the vertical resolution of the lidar system without compromising the thickness of the laser emitting boards.
Implementation Method 1
an optical collimating unit for collimating the outgoing lasers
Data Source
AI summary
Disclosed are a multi-line lidar and a control method therefor. The multi-line lidar comprises: a laser emitter (110) for emitting outgoing lasers, comprising a plurality of laser emitting boards (111, 211, 212, 211, 212, 213, 310 and 320), and an optical collimating unit (120) for collimating the outgoing lasers. Light-emitting surfaces of the plurality of laser emitting boards (111) are located in a focal plane (130) of the optical collimating unit (120).