Wireless Grip Gauge for Hand Dexterity Assessment
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Solution Overview
Problem
Current upper-limb dexterity assessments fail to effectively measure grip force and disentangle sensory and motor deficits, limiting their ability to assess hand dexterity, especially in neurodegenerative diseases and prosthetic technology.
Innovation Solution
A grip gauge with a force sensor, control unit, and wireless transmitter that measures and transmits grip force data, along with an accelerometer and Hall effect sensor, providing real-time feedback and metrics such as peak grip force, acceleration, and transfer speed, to differentiate motor and sensory deficits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional dexterity assessments like Box and Blocks test are used, then gross motor function can be evaluated, but grip force regulation ability cannot be measured
Solution Approach 1:
The patent replaces traditional mechanical assessment tools (like the Box and Blocks test) with an electronic sensor-based system. A force sensor integrated into the grip device electronically measures grip force, replacing the need for complex mechanical setups and enabling precise quantification of grip force regulation that was previously impossible with mechanical-only approaches.
Solution Approach 2:
The grip device serves multiple functions: it measures grip force magnitude, detects grip force variability, tracks transfer speed, and provides real-time feedback. This multi-functionality allows a single device to replace multiple separate assessment tools, enabling comprehensive dexterity evaluation including both gross motor function and fine grip force regulation.
2Loss of information
If fragile-object tests are used to assess fine motor function, then grip force regulation can be evaluated, but sensory and motor deficits cannot be disentangled
Solution Approach 1:
The device provides real-time feedback to the user through visual or auditory signals when grip force approaches the threshold that would break the fragile object. This feedback loop allows researchers to assess not only motor control but also how users process sensory information about their own grip force, enabling differentiation between sensory and motor deficits.
Solution Approach 2:
The patent uses electronic sensors and digital processing to capture and analyze grip force data, replacing subjective mechanical assessments. The force sensor provides objective, quantifiable measurements of grip force magnitude and variability, while the control unit processes this data to distinguish between sensory processing issues and motor execution problems.
3Productivity
If manual grip force measurement methods are used, then simple assessment can be performed, but real-time feedback and detailed metrics cannot be provided
Solution Approach 1:
The force sensor continuously measures grip force throughout the entire task, providing uninterrupted real-time data. This continuous measurement enables the system to track grip force dynamics during object transfer, calculate transfer speed, and provide immediate feedback, eliminating the need for intermittent manual measurements and preserving complete grip force information.
Solution Approach 2:
The device automatically records, processes, and analyzes grip force data without requiring external intervention. The control unit continuously monitors sensor output, calculates relevant metrics (peak grip force, force variability, transfer speed), and provides feedback autonomously, enabling efficient assessment while capturing comprehensive grip force information that would be lost with manual methods.
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 grip gauge improves assessment and training modalities by providing detailed grip force metrics, enabling real-time feedback and differentiating motor from sensory deficits, enhancing the evaluation of hand dexterity.
Implementation Method 1
The force sensor is configured to measure grip forces applied to the shell
Implementation Method 2
The control unit is communicatively connected to the accelerometer and the wireless transmitter is configured to transmit measured accelerometer data to the one or more external devices
Implementation Method 3
The grip gauge can also include a Hall effect sensor housed within the shell
Data Source
AI summary
A grip gauge is configured to measure grip force from a single hand of a user. The grip gauge comprises a shell and a force sensor housed within the shell. The force sensor is configured to measure grip forces applied to the shell. The grip gauge also includes a control unit housed within the shell and communicatively connected to the force sensor, and a wireless transmitter communicatively connected to the control unit and configured to transmit measured grip forces to one or more external devices.