Portable Radar Speed Control for Hard-to-Detect Road Users
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Solution Overview
Problem
Autonomous vehicles face challenges in detecting small or slow-moving objects and are prone to accidents due to sensor limitations, especially in adverse weather conditions, leading to increased safety risks.
Innovation Solution
A portable radar system mounted on target objects communicates with autonomous vehicles via a ZigBee network to provide real-time object information, allowing the vehicle to adjust speed or stop based on proximity to the object, with adjustable reference distances and transmission periods to enhance safety and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sensors mounted on autonomous vehicle are used for detection, then autonomous driving control can be performed, but detection of small or slow-moving objects is limited and detecting area is restricted due to environmental variables
Solution Approach 1:
A portable radar is introduced as an intermediary detection device mounted on the target object (pedestrian, cyclist, etc.) itself. This radar detects approaching vehicles and transmits warning signals, acting as a mediator between the vehicle and the detection system. This resolves the limitation of vehicle-mounted sensors by placing the detection capability directly on the vulnerable road user.
Solution Approach 2:
Instead of having the autonomous vehicle detect the target object, the detection function is inverted by mounting the radar on the target object itself. The target object becomes the active detector, reversing the traditional detection architecture and enabling detection of objects that are otherwise hard to detect with vehicle-mounted sensors.
2Reliability
If radar information is transmitted continuously to ensure real-time detection, then safety is improved, but battery consumption increases
Solution Approach 1:
The portable radar transmits information periodically rather than continuously. The transmission period is dynamically adjusted based on the detected situation - shorter periods when vehicles are approaching (high risk) and longer periods when no vehicles are detected (low risk). This periodic transmission maintains safety while significantly reducing battery consumption compared to continuous transmission.
Solution Approach 2:
The radar transmission period is made dynamic rather than static. The system automatically adjusts the transmission interval based on real-time detection of vehicle approach and environmental conditions. This dynamic adaptation allows the system to maintain high safety during critical moments while conserving energy during normal conditions.
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 system effectively reduces accident risks by accurately detecting and responding to nearby objects, improving driving stability and extending battery life through adaptive radar operation.
Implementation Method 1
a portable radar mounted on the target object... receive radar information of a portable radar
Implementation Method 2
communicates with autonomous vehicles via a ZigBee network to provide real-time object information
Data Source
AI summary
The present disclosure provides device for controlling a speed of an autonomous vehicle using a portable radar provided in a target object, the device including a receiver for receiving radar information of a portable radar, a process configured to determine whether a target object is located in the vicinity of an autonomous vehicle based on the radar information, and a controller configured to reduce a speed of the autonomous vehicle or stop the autonomous vehicle based on the target object being located in the vicinity of the autonomous vehicle.