3D Laser Radar Light Shielding Chamber to Reduce Signal Scattering
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Solution Overview
Problem
Existing 3D laser radars suffer from laser signal scattering and reflection issues due to the protective cover design, leading to non-ideal scanning results and poor user experience.
Innovation Solution
A light shielding chamber is provided between the reflecting mirror and the protective cover to reduce scattering and reflection of laser signals, maintaining a consistent distance during rotation, thereby improving scanning performance and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the light shielding channel is positioned far from the protective cover, then the structure allows easier assembly and maintenance, but laser signal scattering occurs in the protective cover causing interference to the return path signal
Solution Approach 1:
A light shielding plate is introduced as an intermediary component between the light shielding channel and the protective cover. This plate extends from the light shielding channel toward the protective cover, blocking scattered laser light from entering the protective cover and interfering with the return path signal, while maintaining the advantageous positioning of the light shielding channel for assembly and maintenance.
Solution Approach 2:
The light shielding function is segmented into multiple components: the light shielding channel, the light shielding plate, and the protective cover. This segmentation allows each component to perform its specific function independently - the channel provides structural support and initial shielding, the plate provides additional shielding against scattered light, and the cover protects internal components.
2Reliability
If the protective cover is designed to cover the mounting base, then the internal components are well protected, but reflection of the laser signal occurs affecting reception on the return path
Solution Approach 1:
The light shielding plate serves as a mediator between the protective cover and the laser transmission path. It strategically blocks scattered and reflected laser light from the protective cover, preventing this harmful light from interfering with the return path signal while allowing the protective cover to maintain its protective function.
3Device complexity
If a single-threaded laser radar is used to achieve three-dimensional scanning, then the device complexity is reduced, but scattering and reflection of laser signals in the protective cover cause non-ideal scanning results
Solution Approach 1:
The light shielding plate is added as a minimal-complexity intermediary component that effectively blocks scattered and reflected laser light. This simple addition significantly improves scanning accuracy by preventing interference with the return path signal, while maintaining the simplicity of the single-threaded laser radar structure.
Solution Approach 2:
The design acknowledges that some laser light will inevitably scatter and reflect from the protective cover, but converts this potentially harmful effect into a beneficial one by using the light shielding plate to redirect or block this scattered light away from the return path, thereby improving measurement precision without complicating the overall structure.
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
The solution enhances scanning performance and stability by minimizing laser signal interference, resulting in a more reliable scanning result for external environments.
Implementation Method 1
scattering of a laser signal occurs in the protective cover after the laser signal is transmitted out from the light shielding channel
Implementation Method 2
reflection of the laser signal transmitted from a laser transmitter occurs when the laser signal passes through the protective cover on a mounting base
Implementation Method 3
a laser receiver, a convex lens, a laser transmitter and a reflector sequentially provided on the mounting base. The laser receiver is provided at a focus position of the convex lens
Data Source
AI summary
In a 3D laser radar, a light shielding chamber is provided between a reflecting mirror and a protective cover, the light shielding chamber is directly fixed on a rotation axis of the reflecting mirror along a laser signal transmission direction, and an arc-shaped part close to a rotation trajectory of an end portion of the light shielding chamber is provided on the protective cover, such that a distance between the end portion and the arc-shaped part remains unchanged during rotation of the light shielding chamber. By providing the light shielding chamber between the reflecting mirror and the protective cover, scattering and reflection of a laser signal transmitted from the reflecting mirror in the protective cover are reduced, avoiding interference to a laser signal on a return path, and thereby improving the scanning performance of the laser radar.