Traffic Image Generation During Earthquake-Induced Roadside Vibration
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Solution Overview
Problem
Existing imaging systems attached to road equipment, such as traffic signals, fail to provide adequate traffic information during disasters like earthquakes due to vibration, which affects image quality and usability.
Innovation Solution
A traffic information generation system that includes a traffic information generation means and a notification acquisition means to generate traffic information using different processing methods before and during a disaster, such as correcting for shaking or increasing frame rate, to ensure accurate image capture and analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an imaging means is attached to equipment on a road for traffic control, then traffic information can be acquired for coordination among traffic signals, but when a disaster such as an earthquake occurs, the imaging means vibrates and adequate traffic information cannot be acquired
Solution Approach 1:
The patent applies dynamics by switching between two different generation processing modes based on the disaster state. When a disaster is detected, the system transitions from first generation processing (normal mode) to second generation processing (disaster mode), which uses different parameters such as longer exposure time or higher gain to compensate for vibration. This dynamic adaptation allows the system to maintain reliability under varying conditions.
Solution Approach 2:
The patent changes imaging parameters based on the disaster state. In the second generation processing for disaster conditions, parameters such as exposure time, gain, or resolution are adjusted to compensate for the effects of vibration. This parameter adaptation enables the imaging means to continue acquiring usable traffic information even when subjected to seismic activity.
2Reliability
If different generation processing is used for disaster periods compared to normal periods, then adequate traffic information can be acquired during disasters, but the system complexity increases due to multiple processing modes
Solution Approach 1:
The patent implements preliminary action by pre-defining multiple generation processing modes (first for normal conditions, second for disaster conditions) and preparing the notification acquisition means in advance. When a disaster occurs, the system simply switches between pre-configured modes rather than dynamically calculating new parameters, which reduces the computational complexity while maintaining reliability.
Solution Approach 2:
The system uses feedback from the notification acquisition means to determine when to switch between processing modes. The notification indicating disaster occurrence triggers the transition from first to second generation processing, creating a closed-loop control system that automatically adapts to changing conditions without requiring complex real-time analysis.
Data Source
AI summary
The information generation system includes a traffic information generation unit for generating, as an image, information about traffic on a road for a prescribed period, and a notification acquisition unit for acquiring a notification indicating the period of occurrence of a disaster in the vicinity of the road; the traffic information generation unit uses a first generation process to generate the traffic information for a period from which the time of occurrence has been excluded from the prescribed period, and uses a second generation process different from the first generation process to generate the traffic information for the period of occurrence during the prescribed period.