Mirror Driving Device for Laser Radar Scanning
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Solution Overview
Problem
Conventional mirror driving devices for laser radars face limitations in scanning wide areas due to signal wires getting caught and broken during large rotations, restricting the angular range of laser beam scanning.
Innovation Solution
The mirror driving device incorporates a rotating shaft, a first driving source, a mirror holder, a rotating body, a guide, and a second driving source, allowing the mirror to pivot independently in both panning and tilting motions without the need for signal wires, enabling a wide range of rotation and scanning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a rotating body is used with signal wires to drive the mirror, then the mirror can be positioned and controlled, but the signal wires get caught and broken during large rotations, limiting the scanning area
Solution Approach 1:
The patent removes the signal wires from the rotating body, extracting the problematic component that limited rotation. The driving source is relocated to the stationary base, eliminating the signal wire constraint entirely and enabling unrestricted rotation for wide-area scanning.
Solution Approach 2:
The patent introduces a stationary base as an intermediary that houses the driving source. This mediator transfers rotational motion to the rotating body through mechanical coupling while keeping the control system stationary, avoiding the signal wire problem.
2Adaptability or versatility
If the mirror holder is positioned close to the rotating shaft, then the structure is compact, but the scanning area is limited
Solution Approach 1:
The patent positions the mirror holder at the outer periphery of the rotating body, utilizing the radial dimension to maximize the scanning radius. This dimensional arrangement expands the scanning area without significantly increasing the overall structural volume.
3Ease of operation
If the mirror holder and rotating body are integrated, then the structure is simplified, but the mirror cannot pivot independently for tilting
Solution Approach 1:
The patent segments the mirror support system into distinct components: the mirror holder for tilting motion and the rotating body for panning motion. This segmentation enables independent pivoting of the mirror for both tilting and panning operations while maintaining manageable structural complexity.
Solution Approach 2:
The patent combines multiple functions into the integrated mirror driving device, where the same mechanical structure supports both the tilting mechanism (via mirror holder pivoting) and the panning mechanism (via rotating body rotation), achieving functional consolidation without excessive complexity.
Data Source
AI summary
A mirror driving device includes a rotating shaft, a first driving source, a mirror holder, a mirror, a rotating body, a guide, a moving mechanism, and a second driving source. The first driving source rotates the rotating shaft. The mirror holder is supported on the rotating shaft by a support shaft extending perpendicular to the rotating shaft and is rotatable about the support shaft. A holding part is provided at an edge of the mirror holder. The mirror holder is placed on the rotating body at a position located away from the support shaft. The guide is disposed at the holding part, and guides the holding part so as to be capable of changing a distance between the holding part and the rotating shaft. The moving mechanism moves the rotating body in a direction parallel to the rotating shaft in a state where the rotating body is rotatable with the rotating shaft. The second driving source moves the rotating body via the moving mechanism.