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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of Sensor Science and Technology
Journal Basic Information
Journal DOI :
The Korean Sensors Society
Editor in Chief :
Volume & Issues
Volume 18, Issue 6 - Nov 2009
Volume 18, Issue 5 - Sep 2009
Volume 18, Issue 4 - Jul 2009
Volume 18, Issue 3 - May 2009
Volume 18, Issue 2 - Mar 2009
Volume 18, Issue 1 - Jan 2009
Selecting the target year
Trends in recent sensor technology using nano materials-Review
Park, Joon-Shik ; Park, Kwang-Bum ; Kim, Seong-Dong ; Park, Hyo-Derk ;
Journal of Sensor Science and Technology , volume 18, issue 5, 2009, Pages 327~336
DOI : 10.5369/JSST.2009.18.5.327
Mobile u-healthcare system in IEEE 802.15.4 WSN and CDMA network environments
Toh, Sing-Hui ; Lee, Seung-Chul ; Lee, Hoon-Jae ; Do, Kyeong-Hoon ; Chung, Wan-Young ;
Journal of Sensor Science and Technology , volume 18, issue 5, 2009, Pages 337~342
DOI : 10.5369/JSST.2009.18.5.337
This paper describes a robust mobile u-healthcare system with multiple physiological signs measurement capability in real time with integration of WSN(wireless sensor network) technology and CDMA(code division multiple access) network. A cellular phone receives health data in WSN and performs local physiological signs analysis at a phone processor, and then transmits abnormal data to server for further detail or precise health signal evaluation by a medical doctor over a CDMA network. Physiological signs of the patients are continuously monitored, processed and analyzed locally at cellular phone process to produce useful medical information for diagnosis and tracking purposes. By local simple analysis in cellular phone processor we can save the data transmission cost in CDMA network. By using the developed integrate ubiquitous healthcare service architecture, patients can realize self-health checking so that the prevention actions can be taken earlier. Appropriate self-monitoring and self-management can cure disease and relieve pain especially for patients who suffer from chronic diseases that need long term observation.
thick films on alumina substrate as temperature and humidity ceramic multisensors
Oh, Young-Jei ; Lee, Deuk-Yong ;
Journal of Sensor Science and Technology , volume 18, issue 5, 2009, Pages 343~348
DOI : 10.5369/JSST.2009.18.5.343
(BST) thick films were screen printed on Pt patterned alumina substrate to investigate the effects of sintering temperature on humidity and temperature sensing properties of ceramic sensors. A raise in sintering temperature increased resistance and B constant of the Mn-Ni-Co temperature sensor. This may have derived from the synergic effects of the reduction in charge carriers caused by the substitution of Co for Mn as well as the formation of microcracks from the difference in thermal expansion coefficients. Dependence of resistance on humidity of the Mn-Ni-Co temperature sensor, however, was not found. BST films sintered at temperatures in the range of
showed excellent humidity sensing properties. The BST humidity sensor was faster in its response than the Mn-Ni-Co temperature sensor. The humidity sensor, however, proved to be unstable under various temperatures, suggesting a need for a temperature stabilizing device. In contrast, the Mn-Ni-Co temperature sensor was stable under humid conditions.
Fabrication of micro heaters with uniform-temperature area on poly 3C-SiC membrane and its characteristics
Chung, Gwiy-Sang ; Jeong, Jae-Min ;
Journal of Sensor Science and Technology , volume 18, issue 5, 2009, Pages 349~352
DOI : 10.5369/JSST.2009.18.5.349
This paper describes the fabrication and characteristics of micro heaters built on AlN(
) suspended membranes by surface micromachining technology. In this work, 3C-SiC and AlN films are used for high temperature environments. Pt thin film was used as micro heaters and temperature sensor materials. The resistance of temperature sensor and the power consumption of micro heaters were measured and calculated. The heater is designed for operating temperature up to about
and can be operated at about
with a power of 312 mW. The thermal coefficient of the resistance(TCR) of fabricated Pt resistance of temperature detector(RTD)'s is 3174.64 ppm/
. A thermal distribution measured by IR thermovision is uniform on the membrane surface.
Pre-shaping of ionic polymer metal composite actuators by heat treatment and characterization
Park, Shin-Ho ; Kim, Dong-Ik ; Park, Man-Jun ; Lee, Seung-Ki ;
Journal of Sensor Science and Technology , volume 18, issue 5, 2009, Pages 353~358
DOI : 10.5369/JSST.2009.18.5.353
Ionic polymer metal composite(IPMC) has been used as a promising material for various actuator applications. The IPMC actuator is difficult to be fabricated with complicated 3-dimensional shape. We propose a simple heat treatment process that can fabricate IPMC actuator with various shapes. Experimental results show the pre-shaped IPMC actuator by heat treatment does not show any degradation of its actuation abilities such as bending displacement, generation force and reliability in bending motion.
One point detection electrocardiography sensor using MEMS and flexible printed circuit technology
Kim, Hong-Lae ; Lee, Chung-Il ; Lee, Chung-Keun ; Lee, Myoung-Ho ; Kim, Hyun-Jun ; Choi, Eui-Jung ; Kim, Yong-Jun ;
Journal of Sensor Science and Technology , volume 18, issue 5, 2009, Pages 359~364
DOI : 10.5369/JSST.2009.18.5.359
This paper presents flexible electrocardiography(ECG) sensors using micro electro mechanical systems(MEMS) and flexible printed circuit(FPC) technology. By using FPC technology, ECG sensors which consisted of an outer hook-shaped electrode and an inner circular-shaped electrode were fabricated on the polyimide substrate. Thereafter, the bipolar ECG sensor was miniaturized using MEMS technology. The ECG measurement capability was examined by attaching the sensor to the human chest and wrist. Performance of the proposed sensors was then compared with ECG measured by commercial Ag/AgCl electrodes. It was verified that ECG could be measured using proposed sensors at only single body.
Spectroscopic study on the development of fiber-optic pH sensor
Yoo, Wook-Jae ; Heo, Ji-Yeon ; Cho, Dong-Hyun ; Jang, Kyoung-Won ; Seo, Jeong-Ki ; Lee, Bong-Soo ; Cho, Young-Ho ; Moon, Joo-Hyun ; Park, Byung-Gi ;
Journal of Sensor Science and Technology , volume 18, issue 5, 2009, Pages 365~371
DOI : 10.5369/JSST.2009.18.5.365
In this study, we have fabricated a fiber-optic pH sensor which is composed of a light source, plastic optical fibers and a spectrometer. As an indicator, a phenol red is used, and a pH liquid solution is prepared by mixing of phenol red and various kinds of pH buffer solutions in these experiments. The emitting light from a light source is guided by plastic optical fibers to the pH liquid solution, and the optical characteristic of a light is changed in the pH liquid solution according to its color change. Therefore, we have measured the intensities and wavelength shifts of the modulated lights, which are changed due to the color variations of phenol red at different pH values, by using of a spectrometer for spectral analysis. Also, the relationships between the pH values of liquid solutions and the optical properties of modulated light according to the change of color of phenol red are obtained.
Design and analysis of ZnO piezoelectric micro power generators with low frequency
Chung, Gwiy-Sang ; Yoon, Kyu-Hyung ;
Journal of Sensor Science and Technology , volume 18, issue 5, 2009, Pages 372~376
DOI : 10.5369/JSST.2009.18.5.372
This paper describes the characteristics of piezoelectric micro power generators by the ANSYS FEA(finite element analysis). The micro power generator was designed to convert ambient vibration energy to electrical power as a ZnO piezoelectric material. To find optimal model in low vibration ambient, the shape of power generator was changed with different membrane width, thickness, length, and proof mass size. Using the ANSYS modal analysis, bending mode and stress distribution of optimal model were analyzed. Moreover, the displacement with the frequency range was analyzed by harmonic analysis. From the simulation results, the resonance frequency of optimal model is about 373 Hz and investigate the possibility of ZnO micro power generator for ambient vibration applications.
A study for implementation of ultrasonic transducer in the prostate cancer hyperthermia
Park, Mun-Kyu ; Noh, Si-Cheol ; Park, Jae-Hyun ; Choi, Heung-Ho ;
Journal of Sensor Science and Technology , volume 18, issue 5, 2009, Pages 377~384
DOI : 10.5369/JSST.2009.18.5.377
The ultrasonic hyperthermia for oncology has been developed and studied. The HIFU(high intensity focused ultrasound) is the most recent method to treat the tumor by using ultrasound. In this study, an insertion-type transducer for treating a prostate cancer, which can focus the ultrasonic beam mechanically and electrically, was designed and developed. The developed transducer was composed of three arrays, and each array has 32 elements. For the purpose of the mechanical focusing, both side arrays are slanted to the center array by
. With this structure, NFL(near field length) was set up as 30 mm. The PZT-4 and two matching layers were used, and the backing layer was excepted to prevent energy losses. The acoustic field analysis and the heating test were performed to evaluate the performance of developed transducer. The shape of an acoustic field, peak pressure, and acoustic pressure distribution were compared with numerical simulation. The NFL was 32 mm, the beam width was 5 mm, focal area was
, and peak pressure was 5.5 MPa. With heating by using developed transducer, the temperature increased up to
at focal zone. As a result of this study, the usefulness of suggested transducer for prostate cancer hyperthermia was confirmed by the acoustic field analysis and the heating test with TMM(tissue mimicking) phantom.
Algorithm development of a body pressure detection sensor for the occupant classification system
Yun, Duk-Sun ; Oh, Seong-Rok ; Song, Jeong-Hoon ; Kim, Byeong-Soo ; Boo, Kwang-Suck ;
Journal of Sensor Science and Technology , volume 18, issue 5, 2009, Pages 385~392
DOI : 10.5369/JSST.2009.18.5.385
This paper describes the algorithm development of a new body pressure detection sensor for occupant classification system. U.S. Government has required that advanced airbag system should be installed to every automobiles after 2006 according to FMVSS 208 regulation. Therefore, Occupant Classification System should be provided the passenger with safety in order to protect the infants or children that sit in the front passenger seat. When an occupant sits on the chair of the vehicle, deployment of the airbag depends on passenger's weigh distribution and postures. Authors have been developed a new pattern recognition of passenger and weight distribution at the same time by Force Sensing Resistor for the safety.
Development of a intelligent suspension displacement sensor for unified chassis control of advanced safety vehicle
Yun, Duk-Sun ; Lee, Chang-Seok ; Baek, Seong-Hwan ; Kang, Tae-Ho ; Boo, Kwang-Suck ;
Journal of Sensor Science and Technology , volume 18, issue 5, 2009, Pages 393~401
DOI : 10.5369/JSST.2009.18.5.393
This paper describes development of a new displacement sensor for intelligent suspension system in which the damping force has been controlled by MR fluid. Most of the current vehicle height sensors have been installed at external place of the damper and connected to that by mechanical linkages so far. The developed sensor has a new mechanism which detects movement of the sensor rod same as connecting rod in the suspension damper by using a GMR Sensor and converts it to the relative displacement from an initial position.
Measurements of thermal neutron distribution of nuclear fuel using a plastic fiber-optic sensor
Jang, Kyoung-Won ; Cho, Dong-Hyun ; Yoo, Wook-Jae ; Seo, Jeong-Ki ; Heo, Ji-Yeon ; Lee, Bong-Soo ; Moon, Joo-Hyun ; Park, Byung-Gi ; Kim, Sin ; Cho, Young-Ho ;
Journal of Sensor Science and Technology , volume 18, issue 5, 2009, Pages 402~407
DOI : 10.5369/JSST.2009.18.5.402
In this study, plastic optical fiber sensors which can measure thermal neutron dose in a mixed neutron-gamma field are developed and characterized. Using
sources, the scintillators suitable for thermal neutron detection, are tested and the scintillating lights generated from a plastic optical fiber sensor in the Kyoto University Critical Assembly (kuca) core are measured. Also, the distributions of thermal neutron and gamma-ray are measured in a mixed field as a function of the distance from the center of the reactor core at KUCA and the distribution of thermal neutron is obtained using a subtraction method. Sensitivity of the fiber-optic radiation sensor system is about 0.49 V/mW according to power of the KUCA core and its relative error is about 1.2 %.