Precision method of evaluating the tactile response based on the Levitation Mass Method

Naoki Yamashita, Yusaku Fujii, J. D R Valera

Research output: Chapter in Book/Report/Conference proceedingConference contribution


This paper proposes a precision method of evaluating the tactile response. The method is based on the "Levitation Mass Method" (LMM). Generating and/or measuring the dynamic force without use of force transducers is realized using the LMM. In the experiment, a mass that is levitated with a pneumatic linear bearing, and hence encounters negligible friction, is made to collide with a human arm. During the collision, the Doppler frequency shift of a laser beam reflecting from the mass is accurately measured using an optical interferometer. The velocity, position, acceleration and inertial force of the mass are calculated from the measured time-varying Doppler shift. The LMM is characterized by the fact that preparation for the test is easy and the measurement accuracy is high. In the proposed method, the information obtained from the subject's tactile sense is compared with the experimental information (i.e., measurement value). The possibility of using the method for biomedical engineering is discussed. © 2006 ICASE.

Original languageEnglish
Title of host publication2006 SICE-ICASE International Joint Conference
Number of pages5
Publication statusPublished - 2006
Event2006 SICE-ICASE International Joint Conference - Busan, Korea, Republic of
Duration: 18 Oct 200621 Oct 2006


Conference2006 SICE-ICASE International Joint Conference
Country/TerritoryKorea, Republic of


  • Dynamic force
  • Levitation Mass Method
  • Optical interferometer
  • Tactile sense


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