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Pressure and Temperature Sensor with ZnO Nanowire Array

Title
Pressure and Temperature Sensor with ZnO Nanowire Array
Translated Title
ZnO 나노와이어를 이용한 압력과 온도 센서 개발
Authors
Lee, Kyung Hwa
DGIST Authors
Lee, Kyung Hwa; Jang, Jae Eun; Yu, Seong Woon
Advisor(s)
Jang, Jae Eun
Co-Advisor(s)
Yu, Seong Woon
Issue Date
2016
Available Date
2016-02-12
Degree Date
2016. 2
Type
Thesis
Keywords
psychological tactile sensorpain feelingtactile sensingZnO nanowire arraypressure and temperature촉각센서ZnO 나노와이어온도&압력 센서
Abstract
Tactile sensors have recently attracted tremendous interest and the sensing mechanisms have been developed by mimicking the human touch system. However, most previous works have mostly focused on improving the sensitivity of sensors to physical parameters including pressure, strain or temperature. Also, achieving grip control of fragile objects such as eggs is main consideration in robotic hands development. For human beings, psychological feelings including softness, roughness and pain are important factors for interacting with others and the objects. If the tactile sensors which give psychological feelings are applied to various applications such as mobile displays, android robots and prosthetics, they have ability to sense psychological feelings as like humans. Among several emotions, ‘pain’ is the most important feeling because ‘pain’ is indication of damage and humans have self-protection ability by feeling ‘pain’ from external environment. Ultimately, robots with psychological tactile sensor will become as intelligent as human beings while robots perform the duties sensing danger and avoid it at the same time. In this way, realizing psychological tactile sensors is strongly required, however, mimicking psychological feelings is unprecedented until now. In order to perceive ‘pain’ feeling from harsh environments, tactile sensors need to detect pressure and temperature simultaneously. Here, we have demonstrated Zinc oxide nanowire based tactile sensors which can detect pressure and temperature simultaneously. Array type tactile sensors can verify the input objects which may be sharp, blunt, and hot or cool by simple signal processing. This capability means that tactile sensor can convey psychological feelings from the physical parameters. As a result, this tactile sensor can be used to protect android robot hand or mobile phone touch display from external risky environments. ⓒ 2016 DGIST
Table Of Contents
Ⅰ. INTRODUCTION 1 -- 1.1 Overview 1 -- 1.2 Motivation 2 -- 1.3 Thesis Overview 3 -- Ⅱ. BACKGROUNDS 4 -- 2.1 Human Tactile Sensing System 4 -- 2.2 Hints for the Design of Tactile Sensing System 5 -- 2.3 Previous Works 6 -- 2.3.1 Robotic Tactile Sensing System 6 -- 2.3.1.1 Resistive Sensors 6 -- 2.3.1.2 Capacitive Sensors 7 -- 2.3.1.3 Optical Sensors 7 -- 2.3.1.4 Ultrasonic based Sensors 8 -- 2.3.1.5 Piezoelectric Sensors 8 -- 2.3.1.6 Magnetic Sensors 9 -- 2.3.2 Energy Harvesting Applications 9 -- 2.4 Piezo-pyro Electric Nanowire 10 -- 2.4.1 Principles of Piezoelectricity 10 -- 2.4.2 Principles of Pyroelectricity 12 -- 2.4.3 Zinc Oxide (ZnO) Nanowire 14 -- 2.4.4 Thermoelectric Effects 18 -- Ⅲ. EXPERIMENTAL DETAILS 19 -- 3.1 Structure and Fabrication of Tactile Sensor 19 -- 3.2 Experimental Setup 22 -- IV. RESULTS AND DISCUSSIONS 23 -- 4.1 ZnO Nanowire Characteristics 23 -- 4.2 Pressure and Temperature Sensing 31 -- 4.3 Analysis of Various Tactile Stimulus Scenarios 33 -- 4.4 Signal Processing 36 -- V. CONCLUSION 44
URI
http://dgist.dcollection.net/jsp/common/DcLoOrgPer.jsp?sItemId=000002229009
http://hdl.handle.net/20.500.11750/1453
DOI
10.22677/thesis.2229009
Degree
Master
Department
Information and Communication Engineering
University
DGIST
Files:
Collection:
Information and Communication EngineeringThesesMaster


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