Finger-Stabilizing Physiological Detection Ring for Blood Oxygen Accuracy
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Solution Overview
Problem
Conventional wearable physiological information sensing devices, such as smart rings, often fail to accurately detect blood oxygen saturation due to rotation and misalignment with blood vessels, leading to inconsistent detection results.
Innovation Solution
A ring design featuring an annular region and sunken region to stabilize the finger, incorporating detection modules that align with lateral arteries, using a combination of penetration- and reflection-type detection modules to ensure accurate blood oxygen saturation readings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional smart ring design is used, then the ring can be worn on the finger, but the ring rotates easily and the optical sensor cannot align with the blood vessel for accurate detection
Solution Approach 1:
The inner cavity of the ring is segmented into an annular region and a sunken region. The annular region covers the back of the finger while the sunken region receives the finger pulp, creating distinct functional zones that stabilize the ring position and ensure proper alignment of the optical sensor with the blood vessel for accurate physiological detection
Solution Approach 2:
The ring structure is designed with different regional characteristics: the annular region provides coverage and positioning on the finger back, while the sunken region specifically accommodates the finger pulp to prevent rotation. This local differentiation of structural qualities ensures both comfort and detection accuracy
2Ease of operation
If the ring is designed to fit comfortably on the finger, then the user feels comfortable, but the ring may rotate and misalign with blood vessels
Solution Approach 1:
The inner cavity is divided into an annular region for finger coverage and a sunken region for finger pulp accommodation. This segmentation allows the ring to fit comfortably while preventing rotation through the sunken region's engagement with the finger pulp, thereby maintaining detection accuracy
Solution Approach 2:
Different regions of the ring inner cavity are designed with specific qualities: the annular region provides comfortable coverage on the finger back, while the sunken region specifically engages the finger pulp to prevent rotation. This local quality differentiation achieves both comfort and accuracy
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 its position on the finger, ensuring accurate alignment with blood vessels for reliable blood oxygen saturation detection, enhancing the precision and consistency of physiological information acquisition.
Implementation Method 1
Absorption quantity of the red light by oxyhemoglobin is different from absorption quantity of the infrared light by the oxyhemoglobin. 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 module. The case has an inner space adapted to accommodate a finger of the user. The case includes 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 is adapted to cover a back of the finger, the lower bottom of the sunken region contacts against a finger pulp of the finger, the first lateral side and the second lateral side respectively contact against lateral sides of the finger. The detection module is disposed inside the sunken region of the case.