LiDAR Galvanometer Position Adjustment for Blind Spot Reduction
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Solution Overview
Problem
LiDAR systems face challenges in coping with complex and changeable driving scenes due to their fixed field of view, leading to blind spots in certain detection areas.
Innovation Solution
The LiDAR system incorporates a galvanometer module with a driving mechanism, allowing the detection light to be reflected via a reflecting mirror to the galvanometer, which can move between preset positions, thereby adjusting the detection field of view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the LiDAR uses a fixed field of view design, then the structure is simple and stable, but the detection coverage is limited and blind spots occur in complex driving scenes
Solution Approach 1:
The patent applies the dynamics principle by making the galvanometer movable between different positions along the optical axis. The galvanometer can switch between a first position (for normal detection) and a second position (for expanded field of view), enabling the LiDAR to adapt to complex driving scenes. This dynamic adjustment resolves the contradiction by allowing the system to change its detection coverage based on scene requirements while maintaining structural simplicity through a single movable component.
2Length of moving object
If the galvanometer is positioned closer to the optical transceiving module, then the optical path is shorter, but the field of view adjustment range is limited
Solution Approach 1:
The patent resolves this contradiction by making the galvanometer dynamically adjustable along the optical axis. The galvanometer can be positioned at a first position that provides a shorter optical path for normal operation, or moved to a second position that expands the field of view adjustment range. This dynamic positioning capability allows the system to optimize between optical path length and field of view range based on detection requirements.
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 solution enables the LiDAR system to expand and rotate its detection field of view, effectively reducing blind spots and improving obstacle detection capabilities in diverse driving scenarios.
Implementation Method 1
the first reflecting mirror is configured to reflect the detection light emitted by the first optical transceiving module to the galvanometer module
Implementation Method 2
each of the first optical transceiving modules includes a first laser and a second laser
Data Source
AI summary
A LiDAR and a movable device are disclosed. The LiDAR includes a first optical transceiving module, a first reflecting module, and a galvanometer module. The galvanometer module includes a galvanometer and a first driving mechanism. The galvanometer is configured to receive a detection light emitted from the first reflecting mirror of the first reflecting module, and scan a target object. The first driving mechanism is connected to the galvanometer, and the first driving mechanism is configured to drive the galvanometer to move between a first preset position and a second preset position.