Infrastructure Sensor Abnormality Detection via Mobile Probe Data
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Solution Overview
Problem
Existing infrastructure sensor systems face challenges in detecting abnormalities and maintaining reliable information due to low reliability of data acquired, which affects the overall traffic system's efficiency and safety.
Innovation Solution
An abnormality detection method and system that calculates mobile body information and probe data using positional and speed information from infrastructure sensors and radio communication, allowing for abnormality determination by comparing sensor data with independently acquired data from mobile bodies, thereby identifying and addressing issues within the infrastructure sensor apparatus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If infrastructure sensor apparatus is used to detect mobile bodies on roads, then traffic situation grasping capability is improved, but reliability of acquired information deteriorates due to undetected abnormalities
Solution Approach 1:
The patent implements feedback by comparing sensor-detected mobile body information with probe data transmitted from mobile bodies themselves. This closed-loop verification system continuously monitors sensor accuracy and detects abnormalities by identifying discrepancies between independent data sources, thereby maintaining high information reliability without requiring complex manual verification procedures
Solution Approach 2:
The patent introduces probe data from mobile bodies as an intermediary verification source. Instead of directly monitoring sensor health, the system uses independently generated mobile body position and speed data as a mediator to indirectly assess sensor apparatus functionality, simplifying the detection mechanism while improving reliability
2Productivity
If sensor data is used for traffic control decisions, then traffic system efficiency is improved, but system safety deteriorates due to potential sensor abnormalities affecting control accuracy
Solution Approach 1:
The patent applies preliminary anti-action by proactively detecting sensor abnormalities through comparison with probe data before they can cause harmful traffic control decisions. The system continuously validates sensor accuracy and can identify and flag problematic sensors in advance, preventing erroneous control actions that would compromise traffic safety while maintaining efficient operation of reliable sensors
3Measurement precision
If infrastructure sensor apparatus detects mobile bodies, then positional information accuracy is improved, but measurement precision deteriorates when sensor abnormalities occur
Solution Approach 1:
The patent uses probe data from mobile bodies as an intermediary reference to detect sensor abnormalities. By comparing sensor-measured position and speed with independently obtained probe data, the system can identify measurement precision degradation without requiring complex direct sensor diagnostics, thus maintaining accurate positional information while simplifying abnormality detection
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 effective detection of abnormalities in infrastructure sensor systems, improving data reliability and maintaining system efficiency and safety by determining and addressing issues without complex processing, even in cases of hacking or network interference.
Implementation Method 1
self positional information of the mobile body received using a radio communication function included in the mobile body
Data Source
AI summary
An abnormality detection method of an infrastructure sensor apparatus according to the present disclosure is an abnormality detection method of an infrastructure sensor apparatus configured to detect a mobile body that passes within a sensing range, the abnormality detection method including: calculating mobile body information at least including positional information and moving speed information on the mobile body based on information on the mobile body detected by the infrastructure sensor apparatus; calculating probe data at least including positional information and moving speed information on the mobile body based on self positional information of the mobile body received using a radio communication function included in the mobile body; and performing abnormality determination processing in which it is determined that there is an abnormality in the infrastructure sensor apparatus when the mobile body information does not match the probe data.