Input Devices with Simple and Compact Haptic Feedback Mechanisms Driven by Finger Movement

2005 ◽  
Author(s):  
I. Kumazawa
Keyword(s):  
Haptic Feedback ◽  
Finger Movement ◽  
Feedback Mechanisms ◽  
Input Devices

ViFin

2021 ◽  
Vol 5 (1) ◽  
pp. 1-25
Author(s):  
Wenqiang Chen ◽  
Lin Chen ◽  
Meiyi Ma ◽  
Farshid Salemi Parizi ◽  
Shwetak Patel ◽  
...  
Keyword(s):  
Real Time ◽  
Real World ◽  
Wearable Devices ◽  
User Studies ◽  
Finger Movement ◽  
Writing System ◽  
Time System ◽  
Real Time System ◽  
Input Devices ◽  
A New Technique

Wearable devices, such as smartwatches and head-mounted devices (HMD), demand new input devices for a natural, subtle, and easy-to-use way to input commands and text. In this paper, we propose and investigate ViFin, a new technique for input commands and text entry, which harness finger movement induced vibration to track continuous micro finger-level writing with a commodity smartwatch. Inspired by the recurrent neural aligner and transfer learning, ViFin recognizes continuous finger writing, works across different users, and achieves an accuracy of 90% and 91% for recognizing numbers and letters, respectively. We quantify our approach's accuracy through real-time system experiments in different arm positions, writing speeds, and smartwatch position displacements. Finally, a real-time writing system and two user studies on real-world tasks are implemented and assessed.

Torque Control of Electrorheological Fluidic Resistive Actuators for Haptic Vehicular Instrument Controls

2005 ◽  
Vol 128 (2) ◽  
pp. 216-226 ◽  
Author(s):  
M. A. Vitrani ◽  
J. Nikitczuk ◽  
G. Morel ◽  
C. Mavroidis ◽  
B. Weinberg
Keyword(s):  
Electric Fields ◽  
Closed Loop ◽  
Force Feedback ◽  
Haptic Feedback ◽  
Control Device ◽  
Torque Control ◽  
Feedback Mechanisms ◽  
Feedforward Loop ◽  
Integral Controller ◽  
Proportional Integral Controller

Force-feedback mechanisms have been designed to simplify and enhance the human-vehicle interface. The increase in secondary controls within vehicle cockpits has created a desire for a simpler, more efficient human-vehicle interface. By consolidating various controls into a single, haptic feedback control device, information can be transmitted to the operator, without requiring the driver’s visual attention. In this paper, the experimental closed loop torque control of electro-rheological fluids (ERF) based resistive actuators for haptic applications is performed. ERFs are liquids that respond mechanically to electric fields by changing their properties, such as viscosity and shear stress electroactively. Using the electrically controlled rheological properties of ERFs, we developed resistive-actuators for haptic devices that can resist human operator forces in a controlled and tunable fashion. In this study, the ERF resistive-actuator analytical model is derived and experimentally verified and accurate closed loop torque control is experimentally achieved using a non-linear proportional integral controller with a feedforward loop.

Virtual Reality: A Tool for Assembly?

2000 ◽  
Vol 9 (5) ◽  
pp. 486-496 ◽  
Author(s):  
A. C. Boud ◽  
C. Baber ◽  
S. J. Steiner
Keyword(s):  
Virtual Reality ◽  
Virtual Environments ◽  
Haptic Feedback ◽  
Object Manipulation ◽  
Task Planning ◽  
Input Devices ◽  
Assembly Task ◽  
Current Input

This paper reports on an investigation into the proposed usability of virtual reality for a manufacturing application such as the assembly of a number of component parts into a final product. Before the assembly task itself is considered, the investigation explores the use of VR for the training of human assembly operators and compares the findings to conventionally adopted techniques for parts assembly. The investigation highlighted several limitations of using VR technology. Most significant was the lack of haptic feedback provided by current input devices for virtual environments. To address this, an instrumented object (IO) was employed that enabled the user to pick up and manipulate the IO as the representation of a component from a product to be assembled. The reported findings indicate that object manipulation times are superior when IOs are employed as the interaction device, and that IO devices could therefore be adopted in VEs to provide haptic feedback for diverse applications and, in particular, for assembly task planning.

scholarly journals Ultrasonic Sensor Based Haptic Feedback Navigational System for Deaf - Blind People

2020 ◽  
Vol 8 (5) ◽  
pp. 3099-3103
Keyword(s):  
Energy Efficiency ◽  
Cost Efficiency ◽  
Haptic Feedback ◽  
Ultrasonic Sensor ◽  
Rechargeable Battery ◽  
Blind People ◽  
Ultrasonic Sensors ◽  
Feedback Mechanisms ◽  
Limit Space ◽  
Navigational System

Deaf-Blindness is a rare collective disorder that affects nearly 3.5 million people in today’s world. The improvement restricts the usage of two senses and by large impacts a person’s navigational capability. A variety of aid devices are used to tackle such a disability. But one common drawback that setback them is their inability to address the collective disorder. The proposed project aims at overcoming the aforementioned drawback with the help of ultrasonic sensors and haptic feedback in the form of vibrations. These sensors and feedback mechanisms are to be controlled by a microcontroller in an Arduino. Further, a rechargeable battery shall be used to accommodate the power requirements which emphasizes on energy efficiency. The project commits to limit space constraints by proposing a compact handle design and maximizes its cost efficiency such that it is affordable for everyone equally.

scholarly journals Finger motion and contact by a second finger influence the tactile perception of electrovibration

2021 ◽  
Vol 18 (176) ◽  
Author(s):  
Yasemin Vardar ◽  
Katherine J. Kuchenbecker
Keyword(s):  
Relative Motion ◽  
Electrical Impedance ◽  
Haptic Feedback ◽  
Threshold Level ◽  
Contrast Threshold ◽  
Finger Movement ◽  
Kinetic Friction ◽  
Normal Forces ◽  
Finger Motion ◽  
First Time

Electrovibration holds great potential for creating vivid and realistic haptic sensations on touchscreens. Ideally, a designer should be able to control what users feel independent of the number of fingers they use, the movements they make, and how hard they press. We sought to understand the perception and physics of such interactions by determining the smallest 125 Hz electrovibration voltage that 15 participants could reliably feel when performing four different touch interactions at two normal forces. The results proved for the first time that both finger motion and contact by a second finger significantly affect what the user feels. At a given voltage, a single moving finger experiences much larger fluctuating electrovibration forces than a single stationary finger, making electrovibration much easier to feel during interactions involving finger movement. Indeed, only about 30% of participants could detect the stimulus without motion. Part of this difference comes from the fact that relative motion greatly increases the electrical impedance between a finger and the screen, as shown via detailed measurements from one individual. By contrast, threshold-level electrovibration did not significantly affect the coefficient of kinetic friction in any conditions. These findings help lay the groundwork for delivering consistent haptic feedback via electrovibration.

scholarly journals A Human–Computer Interface Replacing Mouse and Keyboard for Individuals with Limited Upper Limb Mobility

2020 ◽  
Vol 4 (4) ◽  
pp. 84
Author(s):  
Diyar Gür ◽  
Niklas Schäfer ◽  
Mario Kupnik ◽  
Philipp Beckerle
Keyword(s):  
Haptic Feedback ◽  
Measurement Unit ◽  
Input Devices ◽  
Text Input ◽  
Word Level ◽  
Prediction Function ◽  
Mouse Pointer ◽  
People With Physical Disabilities ◽  
Contact Pressures ◽  
Keyboard Layout

People with physical disabilities in their upper extremities face serious issues in using classical input devices due to lacking movement possibilities and precision. This article suggests an alternative input concept and presents corresponding input devices. The proposed interface combines an inertial measurement unit and force sensing resistors, which can replace mouse and keyboard. Head motions are mapped to mouse pointer positions, while mouse button actions are triggered by contracting mastication muscles. The contact pressures of each fingertip are acquired to replace the conventional keyboard. To allow for complex text entry, the sensory concept is complemented by an ambiguous keyboard layout with ten keys. The related word prediction function provides disambiguation at word level. Haptic feedback is provided to users corresponding to their virtual keystrokes for enhanced closed-loop interactions. This alternative input system enables text input as well as the emulation of a two-button mouse.

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