Smart Ring Finger Stabilization for Blood Oxygen Detection
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Solution Overview
Problem
Conventional smart rings struggle to accurately detect physiological information, particularly blood oxygen saturation, due to rotation issues and misalignment with blood vessels, which affects the reliability of the detection results.
Innovation Solution
The ring features a unique design with an annular region and a sunken region that securely fits the finger, preventing rotation and ensuring accurate alignment of the detection assembly with the lateral artery. This design includes a detection assembly with first and second detection modules, each equipped with a light source and optical receiver, which emit and receive optical signals to calculate blood oxygen saturation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the ring is designed to fit comfortably on the user's finger, then the user comfort is improved, but the ring rotates on the finger causing misalignment with blood vessels which deteriorates the detection accuracy
Solution Approach 1:
The inner cavity of the ring is designed with an asymmetric structure comprising an annular region and a sunken region. The sunken region creates an asymmetric contact surface that conforms to the natural anatomy of the finger, providing a stable fit that prevents rotation while maintaining comfort. This asymmetric geometry ensures the detection assembly remains properly aligned with the blood vessels regardless of finger movement.
Solution Approach 2:
The invention introduces a vertical dimension to the ring's inner cavity by creating a sunken region that extends downward from the annular region. This dimensional change creates multiple contact points with the finger surface (annular region contacting the top, sunken region contacting the pulp), forming a stable multi-point engagement that prevents rotational movement while preserving comfort.
2Measurement precision
If the optical sensor aligns with the blood vessel, then the detection accuracy is improved, but the ring structure becomes complex to achieve proper alignment which deteriorates the ease of manufacture
Solution Approach 1:
The detection assembly is pre-positioned and fixed within the case at a specific angle and location that corresponds to the optimal alignment with finger blood vessels. The sunken region is pre-formed to guide the finger into the correct position during wear. This preliminary positioning eliminates the need for complex adjustment mechanisms during manufacturing while ensuring accurate alignment is achieved automatically upon wearing the ring.
3Ease of manufacture
If the ring structure is simplified for easy manufacturing, then the ease of manufacture is improved, but the finger stabilization capability is reduced which deteriorates the detection reliability
Solution Approach 1:
The inner cavity is segmented into two distinct functional regions: an annular region for general finger contact and comfort, and a sunken region for stabilization and alignment. This segmentation allows each region to be optimized for its specific function while maintaining overall structural simplicity. The case body and detection assembly are also separated, enabling independent manufacturing and assembly of components.
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 ring effectively stabilizes the finger pulp, preventing rotation and ensuring accurate alignment with blood vessels, thereby providing reliable and precise detection of blood oxygen saturation, enhancing user comfort and data accuracy.
Implementation Method 1
The optical sensor and the light source inside the smart ring are used to detect oxyhemoglobin. The light source alternately emits the red light and the infrared light to the user's finger, which penetrate the skin and are reflected and absorbed by the blood in the blood vessels.
Implementation Method 2
The optical sensor analyzes the received red light and the received infrared light to acquire an absorption ratio of the red light to the infrared light by the oxyhemoglobin for generating blood oxygen saturation.
Data Source
AI summary
A ring of detecting physiological information of a user includes a case and a detection assembly. The case has an inner space including an annular region and a sunken region. The sunken region has a first lateral side, a lower bottom and a second lateral side. The first lateral side and the second lateral side are located on two sides of the sunken region and respectively connected with two sides of the annular region. The annular region covers a back of the user's finger. The lower bottom of the sunken region contacts against a finger pulp of the user's finger. The first lateral side and the second lateral side respectively contact against lateral sides of the finger. The detection assembly is disposed inside the case and includes a first detection module and a second detection module respectively located on the first lateral side and the second lateral side.