LIDAR Mirror Shielding Electromagnetic Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Autonomous vehicles equipped with LIDAR sensors face challenges in preventing electromagnetic interference, which can disrupt the accurate detection of distances and environment mapping, particularly when LIDAR sensors are exposed and vulnerable to interference.
Innovation Solution
A mirror assembly is designed with a conductive mirror base coupled to a LIDAR sensor and a metallized cover, both grounded to shield the sensor from electromagnetic interference, using a vacuum metallized mirror and cover to ensure clear visibility and functionality while minimizing radio frequency wave impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If LIDAR sensor is exposed for clear visibility and operation, then detection accuracy is improved, but vulnerability to electromagnetic interference increases
Solution Approach 1:
The patent applies a metallized thin film coating on the mirror assembly housing to create an electromagnetic shield. This thin metallic layer is deposited on the plastic housing to block electromagnetic interference while maintaining the structural integrity and optical functionality of the mirror assembly, thus protecting the exposed LIDAR sensor without compromising detection accuracy
Solution Approach 2:
The metallized cover acts as an intermediary protective layer between the electromagnetic environment and the LIDAR sensor. This intermediate shield absorbs or reflects electromagnetic waves before they can reach the sensor, allowing the sensor to remain exposed for clear visibility while being protected from harmful interference
2Ease of manufacture
If mirror assembly housing is made from non-conductive plastic for ease of manufacture, then manufacturing cost is reduced, but electromagnetic shielding capability is lost
Solution Approach 1:
The patent creates a composite structure by combining non-conductive plastic housing with a metallized thin film coating. This composite material approach maintains the manufacturing advantages of plastic (low cost, ease of molding) while adding the electromagnetic shielding properties of metal through vacuum deposition or spray coating processes
Solution Approach 2:
The patent changes the surface properties of the plastic housing by depositing a metallic layer. This parameter change transforms the electrical conductivity of the housing surface from non-conductive to conductive, enabling electromagnetic shielding while retaining the bulk properties and manufacturing benefits of the original plastic material
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 effectively shields LIDAR sensors from electromagnetic interference, maintaining their accuracy and functionality while allowing for unobstructed visibility and operation, enhancing the reliability of autonomous vehicle navigation systems.
Implementation Method 1
The mirror and metallized cover are each grounded to the conductive mirror base to help shield the LIDAR sensor from electromagnetic interference
Implementation Method 2
using a vacuum metallized mirror and cover to ensure clear visibility and functionality
Data Source
AI summary
A mirror assembly is coupled to a vehicle and includes a light detection and ranging (LIDAR) sensor, a mirror, and a metallized cover. A conductive mirror base is coupled to the LIDAR sensor, mirror, and metallized cover to form the mirror assembly. The mirror and metallized cover are each grounded to the conductive mirror base where the mirror and metallized cover each help to shield the LIDAR sensor from electromagnetic interference.