Thermal Tactile Perception: Device, Technology, and Experiments

Thermal Tactile Perception: Device, Technology, and Experiments

Junjie Bai, Jun Peng, Dedong Tang, Zuojin Li, Kan Luo, Jianxin Li, Xue Zhang
Copyright: © 2021 |Pages: 19
DOI: 10.4018/IJCINI.20211001.oa22
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Abstract

Using thermal tactile sensing mechanism based on semi-infinite body model, and combining with the advantages of maximum proportional controller, fuzzy and PID controller, a thermal tactile perception and reproduction experiment device (TTPRED) was designed based on the composite control strategy of threshold switching. The finger difference threshold measurement experiment of thermal tactile was carried out and the finger thermal tactile difference threshold was measured. The relationship between thermal tactile sensation and emotion based on temperature cues has been explored. The experiment results show that, the temperature control range of TTPRED is from -10℃ to 130℃, the temperature resolution and precision are 0.01℃ and ±0.1℃ respectively, the maximum heating or cooling rate is greater than 12℃, and the TTPRED can realize the temperature output of the specific waveform quickly and accurately. The experiment results of psychophysical experiment will provide the experimental foundations and technical support for the further study of thermal tactile perception and reproduction.
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2. Finger Thermal Tactile Perception Mechanism

The mechanism of thermal tactile perception is the research basis for the development of thermal tactile perception and reproduction. The tactile perception and reproduction device must be designed according to the characteristics of human receptors.

Figure 1.

Schematic diagram of finger-object contact heat transfer

IJCINI.20211001.oa22.f01

If the contact time of two objects is short enough, it is effective to use a semi-infinite body model to solve the heat transfer problem between them. The heat transfer theories of finger-object contact has been explored based on the model, and analyzed the mechanism of thermal tactile perception (Jones, & Berris, 2003; Yang, Kwon, & Jones, 2009; HO, & Jones, 2008). As shown in Figure 1 (Bai, Li, Chen, Wu, & Cai, 2011), based on the semi-infinite body model, the heat transfer control equations between the finger and the object are as shown in equations (1) and (2) in a short time when the finger and the object are in contact.

IJCINI.20211001.oa22.m01
IJCINI.20211001.oa22.m02
(1)
IJCINI.20211001.oa22.m03
(2)

Boundary conditions on the contact surface of the finger and the object is shown as equation (3).

IJCINI.20211001.oa22.m04
(3)

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