論文 - 大澤　友紀子

Sensing of Heat Source in Deep Layer Using Heat Flow

Yukiko Osawa, Seiichiro Katsura

2017 56TH ANNUAL CONFERENCE OF THE SOCIETY OF INSTRUMENT AND CONTROL ENGINEERS OF JAPAN (SICE) （IEEE）     416 - 419 2017年09月

共著, 筆頭著者, 責任著者, 査読有り

　概要を見る

Heat sensing is necessary for human health care and industrial fields. In many cases, the abnormality of human body or machine is appeared as a heat source. For example, a cancer cell is higher temperature by up to 2 or 3 degree on the skin surface over the tumor. Therefore, abnormal detection is possible to sense through the heat distribution in the material. There are many sensors for observing temperature such as thermocouple, thermistor, thermography, and so on. However, sensing in deep layer of material using these sensors are difficult. This paper proposed the sensing method for detecting heat source inside the material by using heat flow. The method uses an algorithm that heat flow is changed depending on temperature difference. Some experiments are conducted to verify the proposed method.

Temperature Control on a Curved Surface for Implementing to Wearable Interfaces

Yukiko Osawa, Seiichiro Katsura

PROCEEDINGS OF THE IECON 2016 - 42ND ANNUAL CONFERENCE OF THE IEEE INDUSTRIAL ELECTRONICS SOCIETY （IEEE）     348 - 353 2016年10月

共著, 筆頭著者, 責任著者, 査読有り,  ISSN  1553-572X

　概要を見る

Recently, tactile transmission utilizing wearable devices are necessary to support human life or communicating with people in remote locations. One key factor of transmitting tactile sensation is thermal sensation. Flexible thermal devices have been developed, however, precise temperature distribution cannot be reproduced due to the large size and the flexibility of the devices. Therefore, a technique of rendering thermal sensation considering heat propagation is required to obtain the desired temperature distribution. In this paper, a method to control temperature on a curved surface for implementing to wearable devices is proposed. This method can be applied to various shapes of devices because the deformation of a device can be observed by the propagation delay of the heat flow. Experiments are conducted to verify the validity of the proposed method.

Improvements in the safety and efficiency of air traffic

Katsura, S, Osawa, Y, Murata, H

Journal of the Institute of Electrical Engineers of Japan 136 （ 7 ）  2016年07月

共著, 筆頭著者, 責任著者,  ISSN  1881-4190

• Access to Document (DOI)

Temperature Control for Thermal Sensation Based on Thermal Diffusion Equation

Yukiko Osawa, Seiichiro Katsura

PROCEEDINGS 2016 IEEE 25TH INTERNATIONAL SYMPOSIUM ON INDUSTRIAL ELECTRONICS (ISIE) （IEEE）     1264 - 1269 2016年06月

共著, 筆頭著者, 責任著者, 査読有り,  ISSN  2163-5137

　概要を見る

Technique of rendering thermal sensation can connect people who are in remote locations, such as teletherapy and a multimodal system. Humans feel detailed temperature distribution and recognize the characteristic of a contacting object. Although, conventional method can only render the thermal sensation of a fingertip or a part of a hand. In the case of combining these techniques with robot for human support, the robot can only touch one point of a material. This paper proposed the method of temperature control for rendering thermal sensation considering spatial diffusion. The method can spread the area of rendering and help rendering spatial sensations. The validity of the proposed method is verified through some experiments.

Control of Thermal Conductance with Detection of Single Contacting Part for Rendering Thermal Sensation

Yukiko Osawa, Hidetaka Morimitsu, Seiichiro Katsura

IEEJ JOURNAL OF INDUSTRY APPLICATIONS （INST ELECTRICAL ENGINEERS JAPAN）  5 （ 2 ） 101 - 107 2016年03月

共著, 筆頭著者, 責任著者, 査読有り,  ISSN  2187-1094

　概要を見る

The rendering of tactile sensations has recently been attracting attention in the fields of multimedia and communication. This study focuses on thermal sensation, which is one of the important elements for rendering a tactile sensation. Humans feel an object by hand movements such as tracing, grasping, and stroking. In response to such movements, it is necessary to take into account the change in the contacting point on the system. However, most conventional studies on thermal rendering did not take such situations into account in their system design. This study aims to fill this gap by proposing a control method for reproducing thermal conductance with the detection of a single contacting part. In this study, a copper plate attached to a Peltier device is regarded as a thermal system, and the system is modeled with three parts. Heat disturbance observers and heat inflow observers are then allocated to each part, and the thermal conductance at any single part is virtually reproduced. Moreover, a detection method of single contacting part is introduced in the proposed system. Combining the detection method with the controller enables different thermal sensations to be rendered depending on the contacting part.

• Access to Document (DOI)

Multiple Temperature Control with Detection of Contacting Points for Rendering Thermal Sensation

Yukiko Osawa, Seiichiro Katsura

IECON 2015 - 41ST ANNUAL CONFERENCE OF THE IEEE INDUSTRIAL ELECTRONICS SOCIETY （IEEE）     4748 - 4753 2015年11月

共著, 筆頭著者, 責任著者, 査読有り,  ISSN  1553-572X

　概要を見る

Thermal sensation is important for communication tool and multimedia fields as an element of tactile sensation. This research focuses on thermal sensation, and aims to render the sensation spatially. Most of conventional studies present thermal sensation by directly contacting thermal device such as a Peltier device. In this case, it is difficult to get thermal information by the movements of their hands such as tracing. In this paper, a control method for rendering thermal sensation with the consecutive detection of contacting points is proposed. In order to consider temperature distribution of the system, a copper plate attached to the Peltier devices is regarded as a thermal system. A method to detect multiple contacting points is proposed, which uses the value of heat inflow estimated from heat inflow observer, and temperature control at the detected points is conducted. This method enables the system to render spatial thermal sensation in response to the movements of finger. Experimental results show the viability of the proposed control system.

Thermal Impedance Control for Thermal Rendering Technique

Yukiko Osawa, Seiichiro Katsura

IECON 2015 - 41ST ANNUAL CONFERENCE OF THE IEEE INDUSTRIAL ELECTRONICS SOCIETY （IEEE）     4015 - 4020 2015年11月

共著, 筆頭著者, 責任著者, 査読有り,  ISSN  1553-572X

　概要を見る

Rendering technique of tactile sensation is necessary to communicate and share feelings between remote locations. This research focuses on thermal sensation, and not only precise rendering of tactile information but also environmental identification is conducted. Thermal sensation is changed depending on thermal impedance such as thermal resistance and thermal capacitance. In this paper, the identification method of thermal impedance is proposed, and rendering the identified thermal parameters is conducted. The method consists of identification using thermal conductivity and reproduction based on thermal impedance control. In order to identify thermal parameters of an object, an iterative least square technique is used. The proposed method is able to render thermal response precisely for human because thermal impedance is identified based on heat flow in the same way as human skin sensation. The validity of the proposed method is verified through some experiments.