Haptic System Finger Grip Position Detection and Feedback
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Solution Overview
Problem
Human hands can adapt to various shapes and often grip haptic devices in unintended ways, making it difficult for instructors to guide correct gripping, as the gripping state is hidden in the palm and hard to check visually or through recorded videos.
Innovation Solution
A haptic system with a casing that includes sensors to detect finger contact, a notification unit to inform users of correct or incorrect grip positions, and a tactile stimulus generation unit to provide feedback, allowing for easier guidance of gripping the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the degree of freedom of grip is high, then the device can be gripped in various ways, but the casing is often not necessarily gripped as intended by a designer
Solution Approach 1:
The patent employs sensors to detect the actual grip position and provides feedback to the user through visual or auditory signals when the grip is incorrect. This closed-loop feedback system allows users to adjust their grip to match the intended position while preserving the ability to grip in various ways.
Solution Approach 2:
The notification unit uses color changes (e.g., green LED for correct grip, red LED for incorrect grip) to indicate whether the user is gripping the device at the intended position. This visual feedback mechanism guides users to achieve the correct grip without restricting their natural gripping adaptability.
2Reliability
If the gripping state is hidden in the palm, then the device can be held securely, but it is not easy to check an actual practice or a recorded video of another operator
Solution Approach 1:
The patent introduces sensors as intermediaries that detect the grip state internally and transmit this information to the notification unit. This mediator system bridges the gap between the hidden grip state in the palm and the need for visibility, allowing both secure gripping and easy detection of grip correctness.
Solution Approach 2:
The patent replaces manual visual inspection of grip state with an automated sensor-based detection system. Instead of relying on external observers to visually check grip positions, the system uses sensors to automatically detect and evaluate the grip state, eliminating the need for direct line-of-sight observation.
3Ease of operation
If an instructor gives guidance by touching fingers of each operator, then correct grip can be demonstrated, but it is not easy to guide how to grip the casing in remote or multi-user scenarios
Solution Approach 1:
The patent enables the device to guide users independently without requiring instructor intervention. The notification unit automatically provides guidance by indicating correct or incorrect grip positions, allowing users to self-correct their grip. This eliminates the need for complex instructor training systems while maintaining guidance effectiveness.
Solution Approach 2:
The system provides immediate feedback to users about their grip correctness, replacing the need for manual instructor feedback. This automated feedback mechanism scales effectively to remote and multi-user scenarios where instructors cannot physically guide each user.
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
Enables more effective guidance of gripping the haptic device, ensuring a consistent tactile experience and reducing the need for direct instructor feedback, even in remote or multi-user scenarios.
Implementation Method 1
a sensor that is housed in the casing and detects contact of a finger of a user who grips the casing
Implementation Method 2
a tactile stimulus generation unit that provides a tactile stimulus for the user gripping the casing
Data Source
AI summary
A haptic system includes a haptic device and a control device. A sensor of the haptic device detects contact of a finger of a user who grips a casing, a determination unit of the control device determines whether sensor information on a contact position of the finger detected by the sensor of the haptic device matches preset reference position information, and an instruction unit sends a notification unit a notification instruction in at least one of cases where the sensor information does not match the reference position information and where the sensor information matches the reference position information. On accepting the notification instruction, the notification unit of the haptic device notifies the user of an indication indicating that the contact position of the finger is shifted or an indication indicating that the contact position of the finger matches the reference position.