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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of Sensor Science and Technology
Journal Basic Information
Journal DOI :
The Korean Sensors Society
Editor in Chief :
Volume & Issues
Volume 19, Issue 6 - Nov 2010
Volume 19, Issue 5 - Sep 2010
Volume 19, Issue 4 - Jul 2010
Volume 19, Issue 3 - May 2010
Volume 19, Issue 2 - Mar 2010
Volume 19, Issue 1 - Jan 2010
Selecting the target year
Recent research trends on Bio-MEMS
Park, Se-Kwang ; Yang, Joo-Ran ;
Journal of Sensor Science and Technology , volume 19, issue 4, 2010, Pages 259~270
DOI : 10.5369/JSST.2010.19.4.259
MEMS(micro electro mechanical systems) is a technology for the manufacture hyperfine structure, as a micro-sensor and a driving device, by a variety of materials such as silicon and polymer. Many study for utilizing the MEMS applications have been performed in variety of fields, such as light devices, high frequency equipments, bio-technology, energy applications and other applications. Especially, the field of Bio-MEMS related with bio-technology is very attractive, because it have the potential technology for the miniaturization of the medical diagnosis system. Bio-MEMS, the compound word formed from the words 'Bio-technology' and 'MEMS', is hyperfine devices to analyze biological signals in vitro or in vivo. It is extending the range of its application area, by combination with nano-technology(NT), Information Technology(IT). The LOC(lab-on-a-chip) in Bio-MEMS, the comprehensive measurement system combined with Micro fluidic systems, bio-sensors and bio-materials, is the representative technology for the miniaturization of the medical diagnosis system. Therefore, many researchers around the world are performing research on this area. In this paper, the application, development and market trends of Bio-MEMS are investigated.
Capacitive sensor for the detection of residual quantity of intravenous drip solution in a plastic intravenous bag
Wei, Qun ; Woo, Sang-Hyo ; Mohy-Ud-Din, Zia ; Kim, Dong-Wook ; Won, Chul-Ho ; Cho, Jin-Ho ;
Journal of Sensor Science and Technology , volume 19, issue 4, 2010, Pages 271~277
DOI : 10.5369/JSST.2010.19.4.271
Intravenous(IV) drip therapy is extensively used for all kinds of treatments. It works by delivering medicine directly into the vein. When the medicine has been fully dispensed, a dangerous situation occurs since air in the IV drip bag could enter the patient's vein, which is hazardous to the patient’s safety. In this paper, using capacitive sensors to detect the residual quantity of a plastic IV drip pack is proposed. A simulation model of this technology was shown by a finite elements analysis(FEA) program to find out its feasibility and analyze the proper geometrical dimension of a capacitive sensor. According to the FEA simulation, 3 kinds of capacitive sensors were attached to the bottom surface of the plastic IV drip bag to detect the residual quantity in the experiment. Experimental data showed an agreement with the FEA simulation model estimation and confirmed that the sensor works.
Sensor fusion based ambulatory system for indoor localization
Lee, Min-Yong ; Lee, Soo-Yong ;
Journal of Sensor Science and Technology , volume 19, issue 4, 2010, Pages 278~284
DOI : 10.5369/JSST.2010.19.4.278
Indoor localization for pedestrian is the key technology for caring the elderly, the visually impaired and the handicapped in health care districts. It also becomes essential for the emergency responders where the GPS signal is not available. This paper presents newly developed pedestrian localization system using the gyro sensors, the magnetic compass and pressure sensors. Instead of using the accelerometer, the pedestrian gait is estimated from the gyro sensor measurements and the travel distance is estimated based on the gait kinematics. Fusing the gyro information and the magnetic compass information for heading angle estimation is presented with the error covariance analysis. A pressure sensor is used to identify the floor the pedestrian is walking on. A complete ambulatory system is implemented which estimates the pedestrian's 3D position and the heading.
Operation of a wide dynamic range CMOS image sensor based on dual sampling mechanism and its SPICE simulation
Kong, Jae-Sung ; Jo, Sung-Hyun ; Lee, Soo-Yeun ; Choi, Kyung-Hwa ; Seo, Sang-Ho ; Shin, Jang-Kyoo ;
Journal of Sensor Science and Technology , volume 19, issue 4, 2010, Pages 285~290
DOI : 10.5369/JSST.2010.19.4.285
In this paper, a dynamic range(DR) extension technique based on a 3-transistor active pixel sensor(APS) and dual image sampling is proposed. The feature of the proposed APS is that the APS uses two or more photodiodes with different sensitivities, such as a high-sensitivity photodiode and a low-sensitivity photodiode. Compared with previously proposed wide DR(WDR) APS, the proposed approach has several advantages, such as no-external equipments or signal processing, no-additional time-requirement for additional charge accumulation, simple operation and adjustable DR extension by controlling parasitic capacitance and sensitivity of two photodiodes. Approximately 16 dB of DR extension was evaluated from the simulation for the situation of 10 times of sensitivity difference and the same size of parasitic capacitance between those two photodiodes.
A study on improving the surface morphology of recycled wafer forsolar cells using micro_blaster
Lee, Youn-Ho ; Jo, Jun-Hwan ; Kim, Sang-Won ; Kong, Dae-Young ; Seo, Chang-Taeg ; Cho, Chan-Seob ; Lee, Jong-Hyun ;
Journal of Sensor Science and Technology , volume 19, issue 4, 2010, Pages 291~296
DOI : 10.5369/JSST.2010.19.4.291
Recently, recycling method of waste wafer has been an area of solar cell to cut costs. Micro_blasting is one of the promising candidates for recycling of waste wafer due to their extremely simple and cost-effective process. In this paper, we attempt to explore the effect of micro_blasting and DRE(damage removal etching) process for solar cell. The optimal process conditions of micro_blasting are as follows:
powder, jetting pressure of 400 kPa, and scan_speed of 30 cm/s. And the particles formed on micro_blasted wafer were removed by DRE precess which was performed by using HNA(HF/
) and TMAH(tetramethyl ammonium hydroxide). Structural analysis was done using a-step and the XRD patterns.
Design and evaluation of wireless sensor network routing protocolfor home healthcare
Lee, Seung-Chul ; Seo, Yong-Su ; Kwon, Tae-Ha ; Chung, Wan-Young ;
Journal of Sensor Science and Technology , volume 19, issue 4, 2010, Pages 297~305
DOI : 10.5369/JSST.2010.19.4.297
A home healthcare system based wireless sensor network, which can continuously monitor and manage the elderly's electrocardiogram(ECG) signal at any space at home without space limit is proposed. The communication coverage of wireless network is expended by multi-hop wireless sensor network. In order to send the elderly's ECG data wirelessly, a small size ECG sensor node was designed to forward the ECG data over multi-hop relay network. The packet acquired by mobile ECG node is transmitted through wireless intermediate nodes to base station for analyzing the packet reception rate. Modified minimum cost forwarding(MMCF) protocol and flooding protocol are designed and implemented to check the transmission efficiency of a packet in a wireless sensor network. The developed MMCF protocol shows an advantage of high reception rate by reduced network traffic.
Detection of deoxynivalenol using a MOSFET-based biosensor
Lim, Byoung-Hyun ; Kwon, In-Su ; Lee, Hee-Ho ; Choi, Young-Sam ; Shin, Jang-Kyoo ; Choi, Sung-Wook ; Chun, Hyang-Sook ;
Journal of Sensor Science and Technology , volume 19, issue 4, 2010, Pages 306~312
DOI : 10.5369/JSST.2010.19.4.306
We have detected deoxynivalenol(DON) using a metal-oxide-semiconductor field-effect-transistor(MOSFET)-based biosensor. The MOSFET-based biosensor is fabricated by a standard complementary metal-oxide-semiconductor(CMOS) process, and the biosensor's electrical characteristics were investigated. The output of the sensor was stabilized by employing a reference electrode that applies a fixed bias to the gate. Au which has a chemical affinity for thiol was used as the gate metal to immobilize a self-assembled monolayer(SAM) made of 16-mercaptohexadecanoic acid(MHDA). The SAM was used to immobilize anti-deoxynivalenol antibody. The carboxyl group of the SAM was bound to the anti- deoxynivalenol antibody. Anti-deoxynivalenol antibody and deoxynivalenol were bound by an antigen-antibody reaction. In this study, it is confirmed that the MOSFET-based biosensor can detect deoxynivalenol at concentrations as low as 0.1
/ml. The measurements were performed in phosphate buffered saline(PBS; pH 7.4) solution. To verify the interaction among the SAM, antibody, and antigen, surface plasmon resonance(SPR) measurements were performed.
A study of vibration energy harvesting for the bimorph piezoelectric sensor
Kim, Yong-Hyuk ;
Journal of Sensor Science and Technology , volume 19, issue 4, 2010, Pages 313~319
DOI : 10.5369/JSST.2010.19.4.313
Vibration energy harvesting is an attractive technique for potential powering of low power devices such as wireless sensors and portable electronic applications. Most energy generator developed to date are single vibration frequency based, and while some efforts have been made to broaden the frequency range of energy harvester. In this work, The effect of energy harvesting were investigated at various vibration frequencies, vibration beams, vibration point and test masses. The maximum output voltage of the bimorph piezoelectric cantilever was shifted according to vibration point. Vibration frequency with maximum output voltage decreased with the increasing length of vibration beam and increasing test mass. The sample with vibration beam length 0.5 L generated a peak output voltage of 32
and shows a 45 % increase in voltage output in comparison to the corresponding original bimorph. It was found that a piezoelectric bimorph has a possibility to be as the energy harvesting cantilever, which is successfully tuned over a vibration frequency range to enable a maximum harvesting energy.
A study on the design and fabrication of electrostatically actuatedRF MEMS switches
Park, Jae-Hyoung ;
Journal of Sensor Science and Technology , volume 19, issue 4, 2010, Pages 320~327
DOI : 10.5369/JSST.2010.19.4.320
In this paper, electrostatically actuated direct contact type RF MEMS switches have been designed and demonstrated. As driving structures of the switch, cantilever, bridge, and torsion spring beam structures are used and the actuation voltage characteristics of the switches have been compared and discussed. The designed RF switches are fabricated with the surface micromachining technology using the electroplated gold and nickel structures. The characteristics of the fabricated switches are measured and analyzed. The switch, which is fabricated using the 510
-length bridge structure with the thickness of 1.5
, is actuated with 15 V driving voltage. The insertion losses are less than 0.2 dB over the measured frequency ranges from 0 to 20 GHz and the isolations are more than 30 dB.
Dynamic range extension of the n-well/gate-tied PMOSFET-type photodetector with a built-in transfer gate
Lee, Soo-Yeun ; Seo, Sang-Ho ; Kong, Jae-Sung ; Jo, Sung-Hyun ; Choi, Kyung-Hwa ; Choi, Pyung ; Shin, Jang-Kyoo ;
Journal of Sensor Science and Technology , volume 19, issue 4, 2010, Pages 328~335
DOI : 10.5369/JSST.2010.19.4.328
We have designed and fabricated an active pixel sensor(APS) using an optimized n-well/gate-tied p-channel metal oxide semiconductor field effect transistor(PMOSFET)-type photodetector with a built-in transfer gate. This photodetector has a floating gate connected to n-well and a built-in transfer gate. The photodetector has been optimized by changing the length of the transfer gate. The APS has been fabricated using a 0.35
standard complementary metal oxide semiconductor(CMOS) process. It was confirmed that the proposed APS has a wider dynamic range than the APS using the previously proposed photodetector and a higher sensitivity than the conventional APS using a p-n junction photodiode.