Roadside Device Radar Collision Risk Detection
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Solution Overview
Problem
Conventional roadside devices face challenges in quickly and accurately determining collision risks between moving objects due to the need to monitor the state of all objects, leading to increased burden and limited detection resolution, which hinders the detection of small movements and risky pedestrian actions.
Innovation Solution
A roadside device and communication system that includes an object detector, communication device, and controller to receive state information from terminal devices, allowing for the acquisition of position information of objects in a risky state and determining collision risks, with the terminal device detecting detailed moving states and notifying the roadside device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the roadside device monitors the state of all moving objects to determine collision risk, then the collision determination accuracy is improved, but the device burden increases and response speed decreases
Solution Approach 1:
The terminal device performs preliminary detection of its own risky state (acceleration, angle, position) and transmits this information to the roadside device in advance. This allows the roadside device to receive pre-processed state information without needing to monitor all objects comprehensively, thus improving response speed while maintaining collision determination accuracy through the use of the object detector for position verification.
2Area of stationary object
If the roadside device uses radar to detect moving objects, then the detection range is improved, but the detection resolution decreases making it impossible to detect small movements
Solution Approach 1:
The system merges the advantages of two different detection approaches: the terminal device uses high-resolution sensors (acceleration sensor, angle sensor, positioning system) to detect detailed state information locally, while the roadside device uses radar for broad area coverage. The controller integrates both data sources, combining the wide coverage of radar with the high resolution of terminal device sensors to achieve both goals simultaneously.
3Reliability
If the roadside device processes state information from all moving objects, then the collision detection comprehensiveness is improved, but the processing time increases
Solution Approach 1:
The system extracts only the critical state information (acceleration, angle, position) from the terminal device when a risky state is detected, rather than processing all possible data from all moving objects. The controller focuses processing resources on verifying the positions of objects in risky states using the object detector, eliminating unnecessary processing of non-critical data and significantly reducing processing time while maintaining detection comprehensiveness.
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 approach reduces the burden on the roadside device, enables quick and accurate collision risk determination, and improves the detection of small movements and risky actions, enhancing overall safety by providing timely alerts.
Implementation Method 1
a radar (object recognition sensor) is installed in an accident-prone place such as an intersection to monitor moving objects (pedestrians and vehicles) around the roadside device by using the radar
Data Source
AI summary
To enable a risk of collision between moving objects such as a pedestrian and a vehicle to be quickly and accurately determined in a roadside device,when the roadside device receives a message including state information indicating that a pedestrian is in a risky state from a pedestrian terminal, the roadside device acquires position information of a vehicle present around the pedestrian in the risky state based on a result of detecting vehicles on roads by a radar, determines a risk of collision between the pedestrian in the risky state and the vehicle based on the position information of the vehicle, and when the risk of collision exists, transmits a message including alarm information indicating that the risk of collision exists to the terminal.