Sleep-Enhancing Device Control Using Sleep-Stage Detection
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Solution Overview
Problem
Existing sleep-enhancing technologies, such as rocking beds, can cause discomfort or adverse effects due to individual sensitivities to oscillatory motion, posing risks to vulnerable individuals and failing to optimize sleep stages for improved quality.
Innovation Solution
A method and system that uses sensors to estimate a person's sleep stage and adjusts or controls the input from a sleep-enhancing device, like a rocking bed, based on machine learning algorithms to maximize deep sleep and REM stages, minimizing time in lighter stages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If oscillatory motion is applied to enhance sleep, then sleep quality can be improved, but individual sensitivities may cause discomfort or adverse effects
Solution Approach 1:
The system dynamically adjusts the oscillatory motion parameters (amplitude, frequency, duration) based on real-time sleep stage detection and individual sensitivity thresholds. The motion profile changes adaptively throughout the sleep cycle, intensifying during lighter stages and reducing during deep sleep stages to prevent discomfort while maximizing sleep enhancement benefits.
Solution Approach 2:
The system modifies multiple parameters of the oscillatory motion including amplitude, frequency, and temporal duration based on detected sleep stages. During N1-N2 stages, higher amplitude and frequency may be applied, while during N3 and REM stages, parameters are reduced or suspended to avoid adverse effects, thereby optimizing the balance between sleep enhancement and comfort.
2Duration of action of moving object
If oscillatory motion is intensified to maximize sleep enhancement, then deep sleep stages can be prolonged, but vulnerable individuals may experience adverse effects
Solution Approach 1:
The system continuously monitors sleep stage transitions and adjusts oscillatory motion intensity in real-time based on feedback from sensors detecting brain waves, heart rate, and movement patterns. This closed-loop control ensures that motion intensity is optimized to prolong deep sleep while automatically reducing intensity when signs of discomfort or adverse reactions are detected, making the system safe for vulnerable individuals.
Solution Approach 2:
The system establishes individual sensitivity thresholds and motion parameter limits before sleep enhancement begins. Pre-defined safety protocols and motion profiles are prepared for different sleep stages and individual characteristics, allowing the system to prevent adverse effects before they occur while still achieving deep sleep prolongation through carefully calibrated motion application.
3Reliability
If sleep enhancement device operates continuously, then sleep stages can be optimized, but energy consumption increases
Solution Approach 1:
The sleep enhancement device operates periodically rather than continuously, synchronizing oscillatory motion cycles with natural sleep stage transitions. The device activates during periods when motion is most beneficial (lighter sleep stages and transition periods) and remains inactive during deep sleep stages where motion is unnecessary or potentially harmful, thereby optimizing sleep stage distribution while minimizing energy consumption.
Solution Approach 2:
The system uses the sleeping person's own physiological signals (brain waves, heart rate variability, movement patterns) to automatically detect sleep stages and trigger appropriate motion interventions. This self-regulating mechanism eliminates the need for continuous external control or monitoring, allowing the device to operate only when and where needed, thus reducing energy consumption while maintaining effective sleep stage optimization.
Data Source
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AI summary
A method of controlling a sleep enhancing device or system (11), for improving sleep quality for a sleeping person (12), the method comprising the steps of: estimating, based on information from at least one or more sensors, which sleep stage the person is in, the stage of sleep being selected from sleep stage 3 (N3) and sleep stage 4 (REM) or another stage of sleep; and when the person is estimated to be in sleep stage 3 (N3) and/or when the person is estimated to be in sleep stage 4 (REM), performing one of: starting the sleep enhancing device or system to begin providing an input which is acting on the person; stopping the sleep enhancing device or system to cease providing an input which is acting on the person; adjusting the sleep enhancing device or system to change the level of an input which is acting on the person.