Position Management Device Cycle Validation

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Solution Overview

Problem

Existing monitoring systems face challenges in accurately detecting the position of objects due to potential erroneous outputs from individual cameras, leading to decreased accuracy when combining positional information from multiple cameras.

Innovation Solution

A position management device that includes a calculation unit for identifying and calculating positional information, a storage unit for associating identification information with imaging times, and a comparison unit that validates positional data by comparing differences across multiple cycles, discarding erroneous data to ensure precise positioning.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If positional information from multiple monitoring cameras is combined, then measurement precision is improved, but reliability deteriorates when any camera produces erroneous output

Engineering Contradiction:

Improveposition detection accuracyVSAvoidsystem robustness against erroneous output

Core Design Contradiction:

Measurement precisionVSReliability

Solution Approach 1:

The system performs preliminary validation of positional information by comparing current position data with historical position data from the same camera before combining data from multiple cameras. This preliminary check identifies and excludes erroneous outputs from individual cameras, preventing them from degrading the overall system reliability while maintaining the benefits of multi-camera fusion for improved precision.

Inventive Principle:

Principle #10Preliminary action

2Device complexity

If single camera tracking is used, then device complexity is reduced, but measurement precision deteriorates due to potential erroneous output

Engineering Contradiction:

Improvecamera system configurationVSAvoidposition detection accuracy

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The system employs self-validation where each camera's positional information is automatically checked against its own historical data before being used for tracking. This self-service mechanism allows a single camera system to maintain reliability by detecting and correcting its own erroneous outputs, achieving precision comparable to multi-camera systems without the added complexity of multiple camera configurations.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS9418428B2Position management device, position management system, position management method, and position management program

Publication Date: 2016.08.16 NEC CORP

AI summary

The position management device includes: a calculation unit that gives identification on an object being monitored to the object being monitored cyclically imaged, and calculates positional information of the object from an image of the object; a storage unit that associates the identification and an imaging time with the positional information, and stores these items; and a comparison unit that compares, with respect to the object, an absolute value of a difference between the positional information as of a current time and the positional information as of each of the imaging times one and two cycle(s) prior to the current time, as stored in the storage unit, with a predetermined reference value, and outputs the positional information as of the current time if the absolute value for at least one of the imaging times is less than the reference value.