Haptic Grip Structure for Reproducing Torsional Touch Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing haptic devices do not effectively present the sense of touch relating to the behavior of imaginary objects, such as torsional deformation between a grip and a shaft, to operators.
Innovation Solution
A haptic device comprising an external grasp body and an internal drive body connected via a connection shaft, with a motion detection unit to detect operator motion, and a control device to generate control signals for the internal drive body to reproduce the behavior of the imaginary object.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an input device is used as a haptic device to present touch sense, then the device can provide basic haptic feedback, but it cannot present the sense of touch relating to behavior in a grasp portion of an imaginary object
Solution Approach 1:
The haptic device is divided into two distinct bodies: an external grasp body that the operator holds and an internal drive body that generates haptic feedback. This segmentation allows each component to serve its specific function - the external body provides the grasp interface while the internal body produces the tactile sensation, enabling authentic reproduction of grasp portion behaviors.
Solution Approach 2:
The internal drive body is positioned inside the external grasp body, creating a nested structure. This nesting allows the haptic feedback mechanism to be integrated within the grasp portion itself, enabling the device to present tactile sensations directly at the point of grasp while maintaining a natural external appearance.
2Measurement precision
If a conventional controller is used for position control, then the device can track movement, but it cannot reproduce torsional deformation or other behaviors in the grasp portion
Solution Approach 1:
The internal drive body is configured to move dynamically relative to the external grasp body based on detected motion. This dynamic relationship enables the system to reproduce various behaviors including torsional deformation, compression, and other grasp portion movements by adjusting the relative position and orientation of the internal drive body in response to operator input.
Solution Approach 2:
The system uses motion detection to capture the operator's input and feeds this information back to control the internal drive body's movement. This feedback mechanism enables accurate reproduction of imaginary object behaviors by continuously adjusting the haptic feedback based on the detected grasp portion motion.
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 device effectively presents the sense of touch relating to the behavior of imaginary objects, such as torsional deformation, by controlling the internal drive body based on detected motion, enhancing the haptic experience.
Implementation Method 1
a motion detection unit that is provided in the external grasp body to detect a motion of the external grasp body
Implementation Method 2
the behavior in the grasp portion represents, for example, torsional deformation between an external structure such as a grip and an internal structure such as a shaft
Data Source
AI summary
A haptic device includes an external grasp body that is positioned on an outside, formed as a grasp portion of an imaginary object, and grasped by an operator, a motion detection unit that is provided in the external grasp body to detect a motion of the external grasp body, and an internal drive body that is provided in the external grasp body, connected to the external grasp body, and moves relative to the external grasp body on the basis of a result of the detection by the motion detection unit.