NDLI: Control strategies in human pinch motion to detect the hardness of an object

Content Provider	IEEE Xplore Digital Library
Author	Fujita, K. Oyama, Y.
Copyright Year	1999
Description	Author affiliation: Tokyo Univ. of Agric. & Technol., Japan (Fujita, K.)
Abstract	The human pinch is a motion to perceive an object's hardness as well as a motion to hold an object. The understanding of the hardness detecting pinch motion is expected to help in developing artificial reality devices. In this study, the applied force, finger displacement and contact area were measured in the pinch motions with five different objects. The objects were transparent to allow contact area analysis, and with the same texture by putting polyvinyl film on them. Ten volunteers were required to find the harder object from the two different objects presented in sequence without visual information. The pinch motion for the first object was analyzed. The applied force, finger displacement and contact area were normalized by each maximal value. The applied force to the harder object was higher as expected. The first finding in this study was that the contact area is almost constant despite the hardness difference in the pinch motion to perceive the hardness. The next question was how the human maintains the contact area constantly without sensing the hardness in advance. The slopes of the force, the displacement and the contact area were analyzed. The calculated values showed the same tendency as the peak value. It suggests that the control of the contact area is attained without feedback mechanism. The equilibrium point hypothesis was introduced into this experiment. The imaginary displacement was calculated with the measured fingertip and the object hardness. The difference of the imaginary displacement was 29%. It appeared that human pinches object with equilibrium point tactics to perceive the hardness of the object.
Starting Page	682
Ending Page	686
File Size	413386
Page Count	5
File Format	PDF
ISBN	0780357310
ISSN	1062922X
DOI	10.1109/ICSMC.1999.825343
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1999-10-12
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Motion control Humans Object detection Motion detection Fingers Force control Motion analysis Gravity Force measurement Displacement measurement
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in