Matrix Pressure Sensor Position Detection for Sleep Monitoring
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Solution Overview
Problem
Conventional devices for detecting body part positions of a sleeper using pressure distribution sensors require extensive information processing, leading to increased computational load and reduced efficiency in position detection.
Innovation Solution
A position-detecting device comprising a body pressure distribution sensor arranged in a matrix pattern, a specific pattern storage unit, and a scanning unit that applies predetermined patterns to identify body parts by scanning pressure values in a sequential manner, allowing for efficient detection of body part positions and subsequent respiration and heart rate measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the entire pressure distribution is analyzed to detect body part positions, then position detection accuracy is improved, but information processing quantity increases
Solution Approach 1:
The pressure distribution detection area is divided into multiple detection regions corresponding to different body parts. Each detection region independently analyzes pressure data for its specific body part, rather than analyzing the entire pressure distribution map. This segmentation reduces the total processing quantity while maintaining detection accuracy for each body part position.
Solution Approach 2:
The invention extracts and focuses on specific detection regions from the overall pressure distribution that are most relevant for identifying body part positions. By extracting only the necessary pressure data from specific areas (such as head, shoulder, back, leg regions), the system reduces information processing quantity while preserving the accuracy needed for position detection.
2Reliability
If comprehensive pressure distribution analysis is performed, then detection reliability is improved, but processing time increases
Solution Approach 1:
The processing system is segmented into multiple independent detection regions that can process pressure data simultaneously or in a optimized sequence. Each region handles a specific body part's pressure data independently, which reduces overall processing time while maintaining reliable detection through dedicated analysis of each region's characteristic pressure patterns.
Solution Approach 2:
The system performs preliminary identification of body part positions by analyzing pressure distribution patterns in each detection region before conducting comprehensive position determination. This preliminary action quickly identifies potential body part locations, allowing the system to focus subsequent detailed analysis only on relevant regions, thereby reducing total processing time while maintaining detection reliability.
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
The solution enables high-speed and accurate detection of body part positions with reduced processing quantity, providing precise respiration and heart rate measurements by focusing on specific patterns within the pressure distribution data.
Implementation Method 1
a plurality of pressure sensors which are capable of outputting pressure signals corresponding to pressure values respectively
Data Source
AI summary
A position-detecting device includes a body pressure distribution sensor including a plurality of pressure sensors that outputs pressure signals corresponding to pressure values respectively and are arranged in a matrix pattern, a specific pattern storage unit storing a range that pressure sensors can occupy and a condition of pressure values relating to the pressure sensors within the range as a specific pattern by sleeping posture and body part of a sleeper, a scanning unit applying the specific pattern to body pressure distribution information, which is a set of the pressure values, from a scan starting position to an adjacent position in sequence and to determine whether the condition is satisfied, and a body part position determining unit determining the position of the body part in the sleeping posture corresponding to the position of the specific pattern in the body pressure distribution information when the condition is satisfied.