Dynamic Sensor Range for ADAS Speed-Resolution Tradeoff
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Solution Overview
Problem
Conventional advanced driver assistance systems (ADAS) face challenges in processing data quickly enough to react to potential hazards as vehicle speed increases, leading to a limitation in the distance and time available for processing sensor data, which can result in insufficient reaction time for the vehicle.
Innovation Solution
The implementation of a dynamic sensor range system that adjusts camera arrays based on vehicle speed, using a combination of low-resolution and high-resolution cameras, along with a sensor fusion module and cloud service, to enhance processing efficiency and reaction time by focusing on objects farther away and increasing resolution only when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional ADAS systems process sensor data at fixed resolution, then processing consistency is maintained, but processing time becomes insufficient at high vehicle speeds
Solution Approach 1:
The system dynamically adjusts camera resolution based on vehicle speed. At higher speeds, the system switches to lower resolution modes to reduce processing time, while at lower speeds it uses higher resolution for detailed analysis. This dynamic adaptation resolves the contradiction between maintaining processing consistency and achieving sufficient reaction time at varying speeds.
Solution Approach 2:
The patent changes the resolution parameter of sensor data processing based on vehicle speed conditions. By adjusting this key parameter dynamically, the system optimizes the balance between processing speed and detection accuracy, enabling sufficient reaction time at high speeds while maintaining detail at lower speeds.
2Measurement precision
If high-resolution camera data is processed continuously, then object detection accuracy is improved, but processing time increases beyond available reaction time
Solution Approach 1:
The system applies partial processing by selectively using high-resolution data only when necessary (at lower speeds or for critical detections), while using lower-resolution data for routine processing at higher speeds. This partial application of high-resolution processing maintains detection accuracy where needed while avoiding excessive processing time.
Solution Approach 2:
The resolution level is dynamically adjusted based on processing time requirements and detection needs. The system transitions between high and low resolution modes depending on the situation, ensuring that high detection accuracy is achieved only when there is sufficient time to process the data.
3Speed
If the vehicle increases forward speed, then travel efficiency is improved, but the distance and time available for processing sensor data decreases
Solution Approach 1:
The system dynamically adapts its sensor processing range and resolution based on forward speed. At higher speeds, it processes data from a shorter distance with lower resolution, while at lower speeds it can process data from longer distances with higher resolution. This dynamic adjustment maintains travel efficiency while ensuring adequate processing capability at each speed level.
Data Source
AI summary
Various systems and methods for implementing dynamic sensor range in advanced driver assistance systems are described herein. A system for managing an autonomous vehicle comprises a vehicle control system in a vehicle to detect a speed of the vehicle and adjust a forward-facing camera array based on the speed of the vehicle.