Movable Skin Sensor Part Reduces Doming
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Solution Overview
Problem
Existing skin parameter measurement devices suffer from variations in measurement results due to skin doming, which is caused by the rigid housing frame pressing against the skin, leading to inconsistent pressure and deformation.
Innovation Solution
A device with a movable part connected to the housing via an elastic connecting arrangement, allowing the movable part to protrude and move inwardly when pressed against the skin, thereby reducing skin doming and stabilizing pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rigid housing frame is pressed against the skin surface for measurement, then the device structure is simple and stable, but skin doming occurs causing large variations in measurement results
Solution Approach 1:
The device is divided into a rigid housing structure and a separate movable contact part. The movable part can move relative to the housing, allowing the rigid structure to remain stable while the contact surface adapts to skin deformation, thereby reducing measurement variations caused by skin doming.
Solution Approach 2:
The contact part is designed to be movable rather than fixed, enabling it to dynamically adjust its position in response to skin elasticity and doming effects. This dynamic adjustment maintains consistent contact pressure and reduces measurement variations without requiring a completely flexible housing structure.
2Reliability
If the rigid housing frame is designed to reduce skin doming variations, then measurement consistency improves, but the housing dimensions are strongly limited
Solution Approach 1:
By separating the housing structure from the contact surface, the design allows the housing to maintain its dimensional constraints while the contact part independently adjusts to skin variations, achieving measurement consistency without increasing housing size.
Solution Approach 2:
The solution moves the adjustment mechanism from the housing dimension to the contact part position. The movable contact part compensates for skin doming in the vertical dimension while the housing remains constrained in all dimensions, effectively resolving the dimensional limitation.
3Reliability
If pressure level and force are increased to improve contact, then measurement contact is ensured, but skin doming increases causing larger measurement variations
Solution Approach 1:
The movable contact part dynamically adjusts its position based on the force applied, allowing the device to maintain stable contact without requiring high pressure. The movement compensates for skin elasticity, ensuring consistent contact while minimizing skin doming and measurement variations.
Solution Approach 2:
The movable contact part provides mechanical feedback about skin contact conditions. As the contact part moves in response to skin deformation, it naturally regulates the contact force, preventing excessive pressure that would cause significant skin doming while maintaining adequate contact for measurement.
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 significantly reduces variations in skin parameter measurement results by minimizing skin doming and ensuring consistent pressure, leading to more reliable and accurate skin analysis.
Implementation Method 1
a movable part connected to the housing via an elastic connecting arrangement, allowing the movable part to protrude and move inwardly when pressed against the skin
Implementation Method 2
an optical sensing unit for performing measurement of a first skin parameter, the optical sensing unit being provided within the interior cavity of the housing structure and comprising an illuminating unit for illuminating the skin surface by emitting light through the second opening of the movable part and an imaging unit for receiving light reflected by the illuminated skin surface
Data Source
AI summary
The present invention relates to a device for skin parameter measurement, comprising a housing structure (112) defining an interior cavity (120) and a first opening (122) at a skin contact end (124) of the interior cavity (120), a movable part (113, 117) connected to the housing structure (112) via an elastic connecting arrangement (126), the movable part (113, 117) being movable with respect to the housing structure (112) and configured to protrude the skin contact end (124) through the first opening (122) of the housing structure when no external force is applied to move the movable part (113, 117) with respect to the housing structure, the movable part (113, 117) further comprising a second opening (116), an optical sensing unit (118) for performing measurement of a first skin parameter when the device is in contact with a skin surface, the optical sensing unit being provided within the interior cavity of the housing structure and comprising an illuminating unit (118A) for illuminating the skin surface by emitting light through the second opening (116) of the movable part and an imaging unit (118B) for receiving light reflected by the illuminated skin surface, and an electrical sensing unit (136) for measuring a second skin parameter, wherein the electrical sensing unit (136) is arranged at a front end section of the movable part (113, 117) defining the second opening (116).