Haptic Feedback Control Mapping for Operator-Specific Perceptibility
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Solution Overview
Problem
Existing haptic feedback technologies struggle to accurately reproduce haptic sensations beyond skin contact, particularly for muscle and tendon interactions, and lack adaptability to individual operator differences in size and sensitivity.
Innovation Solution
A haptic feedback device with a movable part that adjusts haptic sensation based on operator-specific settings, using magneto-rheological fluid to generate force feedback, and a control system that corrects the correspondence between movement amount and control data to enhance perceptibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If haptic feedback device uses fixed correspondence between movement amount and control data, then device structure is simple, but cannot adapt to individual operator differences in hand size and muscle characteristics
Solution Approach 1:
The patent implements dynamic adjustment of the correspondence relationship between movement amount and control data based on operator-specific settings. The control device allows operators to input their hand size and muscle characteristics, then dynamically corrects the control data to generate appropriate haptic feedback for each individual, transforming a static system into an adaptive one.
Solution Approach 2:
The patent changes the parameters of the control data by applying correction values based on operator characteristics. Specifically, it adjusts the correspondence relationship between movement amount and control data using correction values derived from operator input data, thereby customizing the haptic feedback without requiring complete redesign of the control system.
2Measurement precision
If haptic feedback is presented without correction for operator characteristics, then system operation is simple, but perceptibility of haptic sensation is reduced
Solution Approach 1:
The patent performs preliminary correction of control data based on operator characteristics before haptic feedback is presented. By collecting operator input data (hand size, muscle characteristics) in advance and pre-calculating correction values, the system ensures that the haptic feedback is optimized for each operator's perceptibility without adding complexity during actual operation.
Solution Approach 2:
The patent implements a feedback mechanism where operator characteristics are used to adjust the control data, and the corrected control data is then used to generate haptic feedback that is more perceptible to the specific operator. This creates a closed-loop system where the feedback is continuously optimized based on operator response and characteristics.
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 improves the perceptibility of haptic sensations by adjusting the range and intensity of force feedback to match individual operator preferences and capabilities, enhancing the realism and usability of haptic experiences.
Implementation Method 1
The present inventors have proposed a haptic feedback device that can be operated by an operator and reproduces a different haptic sensation depending on an object on the basis of the finding for a magneto-rheological fluid.
Data Source
AI summary
Provided are a control device, a control method, a haptic feedback system, and a program product for improving perceptibility of haptic sensation by a haptic feedback device. This control device is for a haptic feedback device having a movable part and inducting a sense of force for operation on the movable part in accordance with the movement amount of the movable part and presenting a haptic of an object to be displayed. The control device: stores, for each object to be displayed, control data for generating the sense of force in a case where the object is displayed in association with the movement amount of the movable part; corrects the correspondence relationship between the movement amount and the control data so as to change a scale of the range of the movement amount to the range of the control data; and output, to the haptic feedback device, corrected control data.