LiDAR Modular Boards for Heat Dissipation and EMI Reduction
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Solution Overview
Problem
LiDAR systems face challenges with poor heat dissipation and increased electromagnetic interference, affecting their measurement performance in autonomous driving applications.
Innovation Solution
The LiDAR system is designed with multiple independent boards for heat dissipation and signal processing, including an analog plate, digital plate, emitting plate, receiving plate, and interface plate, which separate digital and analog signal processing to reduce interference and enhance heat dissipation, using heat dissipation components and shielding to manage thermal and electromagnetic issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the LiDAR volume is reduced, then the compactness is improved, but the heat dissipation performance deteriorates
Solution Approach 1:
The LiDAR system is divided into multiple independent functional boards (emitting board, receiving board, analog signal processing board, digital signal processing board, interface board) mounted on a common base plate. This segmentation allows heat to be distributed across multiple mounting points on the base plate, improving heat dissipation efficiency while maintaining a compact overall structure.
2Volume of moving object
If the LiDAR volume is reduced, then the compactness is improved, but the electromagnetic interference worsens
Solution Approach 1:
A common base plate serves as an intermediary structure that electrically connects all functional boards while providing electromagnetic shielding. The base plate acts as a reference potential plane that isolates electromagnetic interference between different boards, enabling compact arrangement without increasing interference.
Solution Approach 2:
Different regions of the base plate are designed with different electrical characteristics - some areas provide electromagnetic shielding, others serve as reference potential planes, and specific zones are optimized for heat dissipation. This localized functional differentiation addresses electromagnetic interference in specific areas while maintaining overall system compactness.
3Device complexity
If digital and analog signal processing are integrated, then the device complexity is reduced, but the measurement precision deteriorates
Solution Approach 1:
Digital signal processing and analog signal processing are separated onto different boards (digital signal processing board and analog signal processing board), each optimized for its specific function. This segmentation prevents digital switching noise from interfering with sensitive analog signals, maintaining measurement precision while keeping the overall system design manageable through modular architecture.
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 design improves heat dissipation efficiency and reduces electromagnetic interference, enhancing the reliability and performance of the LiDAR system by preventing heat accumulation and signal interference.
Implementation Method 1
a window heating sheet connected to the interface plate and configured to convert electrical energy from the interface plate into thermal energy
Implementation Method 2
the bus voltage-stabilizing circuit is attached to an inner wall of the housing via the first heat dissipation component
Implementation Method 3
LiDAR is a radar system that emits a laser beam to detect the position and speed of an object. The working principle of the LiDAR is to first emit a detection laser beam to the object, then compare signals reflected from the object with emitting signals
Data Source
AI summary
The present disclosure relates to a LiDAR. An embodiment of the present invention realizes a control function, a processing function, an emitting function, a receiving function, and an interface function of the LiDAR via each independent board to prevent components from causing a heat accumulation effect. In addition, according to the embodiments of the present disclosure, the digital plate for digital signal processing and the analog plate for analog signal processing are separately arranged to reduce electromagnetic interference between analog signals and digital signals, thereby further reducing the internal interference of the LiDAR.