Nail-Mounted Motion Sensor with Flexible Holder
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Solution Overview
Problem
Current motor function measuring technologies are not convenient for use, particularly in clinical settings, as they require complex attachment processes and are not easily adaptable to individual variations in finger anatomy, which can lead to measurement inaccuracies and increased operator effort.
Innovation Solution
A motor function measuring system comprising a pair of motion sensors with detachable holders and adhesive sheets that can be easily attached to the nails of the thumb and index finger, allowing for quick and hygienic attachment and detachment, while the holders' flexible design accommodates varying finger shapes and sizes, and the system includes a LC resonant circuit to prevent interference between sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional motor function measuring sensors are used, then measurement capability is provided, but attachment complexity increases and ease of operation deteriorates
Solution Approach 1:
The sensor system is divided into separate modular components: a holder unit, an adhesive sheet unit, and a sensor unit. This segmentation allows each component to be independently optimized and attached separately, simplifying the overall attachment process while maintaining measurement functionality.
Solution Approach 2:
An adhesive sheet is introduced as an intermediary element between the holder and the subject's body. This adhesive sheet simplifies attachment by providing a user-friendly, peel-and-stick interface that eliminates complex fastening mechanisms while ensuring secure sensor placement.
2Adaptability or versatility
If fixed holder designs are used, then structural stability is maintained, but adaptability to individual finger anatomy deteriorates
Solution Approach 1:
The holder is designed with flexible, bendable arms that can dynamically adapt to different finger shapes and sizes. This flexibility allows the holder to conform to individual anatomical variations while maintaining stable contact with the sensor placement site through the adhesive sheet.
Solution Approach 2:
The holder incorporates flexible materials that can bend and conform to the curvature of fingers. This flexibility enables the holder to accommodate a wide range of finger anatomies without compromising structural integrity or sensor contact stability.
3Ease of operation
If permanent attachment methods are used, then measurement reliability is improved, but ease of detachment and hygiene deteriorates
Solution Approach 1:
The adhesive sheet is designed as a disposable, single-use component that is attached and removed easily. This approach prioritizes hygiene and ease of detachment, with the adhesive sheet being replaced rather than reused, while still providing reliable sensor attachment during the measurement period.
Solution Approach 2:
The adhesive sheet is intended to be discarded after use, while the holder and sensor units can be recovered and reused. This separation of disposable and reusable components enables easy detachment and maintains hygiene standards while preserving measurement reliability through proper attachment of the adhesive sheet.
4Productivity
If complex attachment mechanisms are used, then measurement precision is improved, but operator effort and time consumption increase
Solution Approach 1:
The adhesive sheet is pre-attached to the holder in a controlled manufacturing environment, preparing the assembly for immediate use. This preliminary action eliminates the need for complex attachment procedures during measurement, allowing operators to simply peel and stick the pre-assembled unit, thereby reducing attachment time and increasing productivity.
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 enables efficient and accurate measurement of motor functions with improved usability, allowing for quick attachment and detachment, reducing operator effort, and providing hygienic operation, suitable for diagnosing conditions like Parkinson's disease and other motor disorders.
Implementation Method 1
a coil generating a magnetic field
Implementation Method 2
the system includes a LC resonant circuit to prevent interference between sensors
Data Source
AI summary
A motion sensor for measuring motion information of a subject comprises a coil substrate having transmitting or receiving coils piled one on top of another and a holder in which the coil substrate is mounted. Formed on the holder are curved surfaces to which an adhesive sheet is stuck and at which the holder is attached to a nail of a subject via the adhesive sheet. Further, there is provided a casing where first and second containing space are formed to contain measurement instruments including an adhesive member where a plurality of the adhesive sheets are laid one on top of another, the motion sensor, and the like.