Stress Analysis Apparatus Predicting Future Stress Levels

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Solution Overview

Problem

Existing stress analysis apparatuses cannot predict how future events will influence stress levels in individuals, as they only record past events and stress indices without forecasting future stress states.

Innovation Solution

A stress analysis apparatus and method that includes a stress factor extraction unit to identify stress-increasing factors from past data and a stress prediction unit to forecast future stress based on user activity schedules, using a stress model generated from biological and activity information.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of information

If only past events and stress indices are recorded in association, then the apparatus can specify events that cause stress, but it cannot predict future stress states

Engineering Contradiction:

Improveprediction capabilityVSAvoidsystem complexity

Core Design Contradiction:

Loss of informationVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by extracting stress factors from past data in advance and storing them in a structured database. This preprocessing enables the prediction unit to quickly query and analyze relevant factors when predicting future stress states, rather than processing raw data in real-time.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent introduces a stress factor extraction unit as an intermediary between data collection and prediction. This unit processes raw stress information and activity data to extract meaningful stress factors, which then serve as input for the prediction unit. The intermediary transforms unstructured data into actionable insights.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If stress factors are extracted and prediction functionality is added, then future stress can be predicted, but the apparatus complexity increases

Engineering Contradiction:

Improvestress prediction accuracyVSAvoidapparatus structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent segments the stress analysis function into distinct units: a stress factor extraction unit that identifies stress-increasing factors from past data, and a prediction unit that uses these factors to forecast future stress states. This segmentation allows each unit to specialize in specific tasks, improving overall prediction accuracy while maintaining modularity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The stress factor extraction unit performs preliminary analysis of past stress information and activity data to identify and extract relevant stress factors before prediction is needed. This preprocessing step ensures that the prediction unit receives refined, high-quality input data, improving prediction reliability.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20230056194A1Stress analysis apparatus, stress analysis method, and computer-readable recording medium

Publication Date: 2023.02.23 NEC CORP

AI summary

A stress analysis apparatus includes: a stress factor extraction unit that extracts, from stress information in which a past state of stress of a user and information regarding a past activity of the user are associated with each other, a factor that increases stress in the user; a stress prediction unit that predicts an increase in stress in the user based on an activity schedule of the user and the extracted factor.