3D Vehicle Sensing with Laser Radar Point Clouds
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Solution Overview
Problem
Current vehicle sensing systems, such as cameras and ultrasonic radars, fail to provide accurate three-dimensional information, leading to limitations in parking and obstacle detection, especially in special scenes, and ultrasonic radars have low resolution and limited range.
Innovation Solution
A vehicle-mounted sensing system with three-dimensional sensor assemblies, including laser radar assemblies using VCSEL and SPAD, strategically positioned around the vehicle to cover a 360-degree range, processing data into point cloud information for enhanced scene understanding and blind zone compensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If camera is used for sensing, then two-dimensional information can be obtained, but height information is lost causing failure in special scenes
Solution Approach 1:
The patent transitions from two-dimensional camera sensing to three-dimensional sensing by introducing laser radar assemblies that emit laser beams and detect reflected light to obtain depth information, thereby adding the third dimension (height/depth) to the sensing capability
2Measurement precision
If ultrasonic radar is used for sensing, then distance information can be obtained within close range, but resolution is low and three-dimensional information is not provided
Solution Approach 1:
The patent replaces ultrasonic radar (mechanical wave-based sensing) with laser radar (electromagnetic wave-based sensing), which provides higher resolution, accurate three-dimensional information, and extended sensing range while maintaining the ability to detect distance
3Measurement precision
If multiple sensor assemblies are positioned around the vehicle for 360-degree sensing, then comprehensive three-dimensional information can be obtained, but system complexity increases
Solution Approach 1:
The patent employs identical laser radar assemblies with the same VCSEL and SPAD structure at multiple positions around the vehicle, allowing each sensor to perform the same three-dimensional sensing function and enabling comprehensive coverage through standardized multi-functional components
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
Enables accurate three-dimensional environment sensing, improving automated driving functions like parking and obstacle avoidance by providing comprehensive and precise physical measurement information.
Implementation Method 1
the emitting apparatus is a vertical-cavity surface-emitting laser (VCSEL)
Implementation Method 2
the processing unit is further configured to implement a direct time of flight (dToF) method or an indirect time of flight (iToF) method
Implementation Method 3
the receiving apparatus is a single photon avalanche diode (SPAD)
Data Source
Figure 1~2
Figure 3~5
AI summary
The disclosure comprises a vehicle-mounted sensing system and a vehicle with the vehicle-mounted sensing system. The vehicle-mounted sensing system comprises: a plurality of sensor assemblies provided at the specific positions of a vehicle to enable sensing of a specific range around the vehicle, the specific range depending on the purpose of sensing and/or characteristics of the sensor assemblies; and a processing unit configured to process sensing data from the plurality of sensor assemblies to generate sensing results; wherein the sensor assemblies are three-dimensional sensing assemblies. With the vehicle-mounted sensing assembly according to the disclosure, a three-dimensional environment around the vehicle can be accurately sensed, and the sensing results can be applied to operations such as parking.