Pedestrian Terminal Abnormal Event Detection via Passage History

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Solution Overview

Problem

Existing pedestrian-vehicle communication systems require dedicated terminals for abnormal event detection, leading to increased costs, and there is a need for a cost-effective method to detect and notify abnormal events for individuals possessing pedestrian devices.

Innovation Solution

A roadside device and pedestrian device communication system that exchanges positional information messages to detect abnormal events by accumulating passage history information and using this data to identify and notify occurrences of events such as kidnapping, abandonment, confinement, stalking, bullying, and hit-and-run.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a dedicated terminal is used for abnormal event detection, then detection reliability is improved, but device complexity and cost increase

Engineering Contradiction:

Improveabnormal event detection reliabilityVSAvoidterminal complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The pedestrian terminal is designed to perform multiple functions: both danger determination (original function) and abnormal event detection (new function). By making the terminal universal, the system eliminates the need for separate dedicated terminals while maintaining detection reliability. The controller executes different detection algorithms based on the same positional information and passage history data.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The invention merges the abnormal event detection function into the existing pedestrian terminal that already performs danger determination. By combining these functions in a single terminal, the system reduces device complexity and cost while achieving reliable abnormal event detection through integrated processing of passage history information.

Inventive Principle:

Principle #5Merging (Combining)

2Measurement precision

If a dedicated terminal is used for abnormal event detection, then detection precision is improved, but cost increases

Engineering Contradiction:

Improveabnormal event detection precisionVSAvoidsystem cost

Core Design Contradiction:

Measurement precisionVSEase of manufacture

Solution Approach 1:

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The existing pedestrian terminal serves itself by adding abnormal event detection capabilities to its original danger determination function. The terminal uses its own positional information and the accumulated passage history information to perform both functions, eliminating the need for external dedicated terminals and reducing overall system cost.

Inventive Principle:

Principle #25Self-service

3Adaptability or versatility

If passage history information is accumulated for all pedestrians, then abnormal event detection capability is improved, but information processing complexity increases

Engineering Contradiction:

Improveabnormal event detection capabilityVSAvoidinformation processing complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The system applies different processing qualities to different data: positional information is accumulated for all pedestrians to build comprehensive passage history, but abnormal event detection analysis is performed selectively based on specific conditions and patterns. This local quality approach maintains detection capability while managing processing complexity through targeted analysis.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The system performs preliminary accumulation of positional information for all pedestrians to build passage history data beforehand. This preliminary action enables later efficient abnormal event detection by having ready-to-use historical data, reducing the complexity of real-time processing while maintaining comprehensive detection capability.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS11037438B2Roadside device, pedestrian device, communication system, abnormality detection method, and abnormality communication method

Publication Date: 2021.06.15 PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD

AI summary

A pedestrian terminal transmits a message including pedestrian information to a roadside machine. In a case where the message transmitted from the pedestrian terminal is received, the roadside machine accumulates the pedestrian information included in the message as passage history information, detects occurrence of an abnormal event for a person possessing the pedestrian terminal based on the passage history information, and transmits the message including information indicating that the abnormal event occurs for the person possessing the pedestrian terminal to a nearby pedestrian terminal.