Annular Biometric Sensor Blood Pressure Measurement System
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Solution Overview
Problem
Existing blood pressure measurement technologies face challenges with portability and accuracy due to invasive methods, large device sizes, and fluctuations in contact pressure, which are influenced by hydrostatic pressure differences between the measurement site and the heart.
Innovation Solution
A biometric data measurement system comprising an annular biometric sensor and a portable control unit that communicate via short-range wireless communication, allowing for non-invasive, accurate blood pressure measurement by stabilizing contact pressure and determining the appropriate measurement posture based on image recognition and inclination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a cuff is used to measure blood pressure, then measurement accuracy is improved, but device size increases and portability deteriorates
Solution Approach 1:
The patent extracts the cuff component from the blood pressure measurement system, replacing it with a finger-mounted sensor that measures blood pressure without requiring a cuff. This eliminates the need for a large inflatable cuff while maintaining measurement capability through alternative physiological measurement methods.
Solution Approach 2:
The patent replaces the mechanical cuff-based measurement system with an optical or electrical sensor system mounted on the finger. This substitution eliminates the need for mechanical inflation and deflation mechanisms, significantly reducing device size while enabling continuous or repeated measurements.
2Ease of operation
If the measurement site is moved away from heart height, then portability and ease of measurement are improved, but measurement accuracy deteriorates due to hydrostatic pressure
Solution Approach 1:
The patent incorporates a posture detection function that provides feedback to the user about their measurement posture. The system detects whether the finger is at the correct height relative to the heart and guides the user to adjust their position, ensuring accurate measurements while maintaining ease of use.
Solution Approach 2:
The patent performs preliminary posture detection and guidance before the actual blood pressure measurement begins. The system checks the measurement conditions and prompts the user to correct their posture in advance, preventing measurement errors due to incorrect positioning.
3Reliability
If finger contact pressure is increased to improve measurement stability, then measurement reliability is improved, but user comfort deteriorates
Solution Approach 1:
The patent employs a dynamic contact pressure mechanism that automatically adjusts the sensor pressure based on finger size and measurement conditions. The system maintains optimal contact pressure for accurate measurements while preventing excessive pressure that would cause discomfort, adapting to different users and situations.
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 system provides high accuracy and portability for blood pressure measurement, unaffected by hydrostatic pressure differences, ensuring reliable and non-invasive data acquisition.
Implementation Method 1
an inclination sensor that is configured to detect an inclination of the portable control unit from a vertical direction
Implementation Method 2
an image capturing unit that is configured to capture an image
Implementation Method 3
a sensor unit that is provided in the main body and is configured to measure biometric data including blood pressure
Data Source
AI summary
A biometric data measurement system is provided that includes an annular biometric sensor and a portable control unit that communicate with each other. The portable control unit determines whether or not the portable control unit is gripped by a hand on which the annular biometric sensor is mounted, determines whether or not a measurement posture of a user is sufficient from a position of a face of the user in an image recognized from the image, and an inclination of the portable control unit from a vertical direction, controls the biometric data measurement system based on a gripping determination result and a posture determination result, and acquires biometric data including blood pressure.