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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 5, Issue 6 - Nov 1996
Volume 5, Issue 5 - Sep 1996
Volume 5, Issue 4 - Jul 1996
Volume 5, Issue 3 - May 1996
Volume 5, Issue 2 - Mar 1996
Volume 5, Issue 1 - Jan 1996
Selecting the target year
Buried Fiber Optic Intrusion Sensor
Park, Jae-Hee ; Kim, Myung-Gyoo ; Sohn, Byung-Ki ;
Journal of Sensor Science and Technology , volume 5, issue 6, 1996, Pages 1~6
The feasibility of producing a practical buried fiber optic sensor with high sensitivity for detecting intruders is demonstrated. Experiments were carried out with the use of an all fiber Michelson interferometer, the sensing arm of which was buried in sand. When the sensing arm was buried 8 inches deep in sand, the pressure length product required for a half fringe shift in: the sensor output was
. The relation between the applied weight and the phase change was almost linear. Experimental results indicated that the sensitivity of the optical fiber sensor was sufficient to detect people on foot and vehicles passing over the buried fiber.
butane gas sensor operating at low temperature (I)
Chung, Jin-Hwan ; Choi, Soon-Don ;
Journal of Sensor Science and Technology , volume 5, issue 6, 1996, Pages 7~14
In order to develop gas sensor operating at low temperature, thick film
sensor was fabricated.
powder was prepared by precipitation from cobalt nitrate solution and the powders containing ethylene glycol as a binder was screen-printed on alumina substrate. Characteristics of sensitivity, response time, and recovery were investigated in terms of binder content and heat treating conditions. The
sensor contained 15% ethylene glycol and heat-treated at
for 24hr showed the highest sensitivity at the operating temperature of
. Its sensitivity of 1.1 to 5000ppm butane gas was very high, as compared with
at the operating temperature of
for a commercial
gas sensor. It is found that response time was fast, but recovery was poor for the sensor.
A study on the application of optical fiber sensors to smart composite structures
Jang, Tae-Seong ; Kim, Ho ; Lee, Jung-Ju ;
Journal of Sensor Science and Technology , volume 5, issue 6, 1996, Pages 15~24
In this study, as a part of the basic study for the application of optical fiber sensors to smart composite structures, the integrity of optical fiber sensors embedded within the composite structures was examined and then the laser signal transmitted through optical fiber sensors during the deformation of host structures was investigated. Firstly, it was found that bending test could be substituted for tensile test by comparing cumulative failure distribution based on weakest link theory and introducing the correction factor. Weibull parameters were obtained through the experiments and the correction factor was found to be applied to cumulative failure distribution derived from bending test. The integrity of embedded optical fiber sensors due to the thermal effect was evaluated by the comparison of the mean tensile strengths of cured and uncured optical fibers. Secondly, relationships between stress-strain curve obtained in tensile test of composite laminate and the intensity of laser signal transmitted through embedded optical fibers were examined and the possibility of the effective damage detection using optical fiber sensors was studied.
Design of BiCMOS Signal Conditioning Circuitry for Piezoresistive Pressure Sensor
Lee, Bo-Na ; Lee, Moon-Key ;
Journal of Sensor Science and Technology , volume 5, issue 6, 1996, Pages 25~34
In this paper, we have designed signal conditioning circuitry for piezoresistive pressure sensor. Signal conditioning circuitry consists of voltage reference circuit for sensor driving voltage and instrument amplifier for sensor signal amplification. Signal conditioning circuitry is simulated using HSPICE in a single poly double metal
BiCMOS technology. Simulation results of band-gap reference circuit showed that temperature coefficient of
at the temperature range of
and PSRR of 80 dB. Simulation results of BiCMOS amplifier showed that dc voltage gain, offset voltage, CMRR, CMR and PSRR are outperformed to CMOS and Bipolar, but power dissipation and noise voltage were more improved in CMOS than BiCMOS and Bipolar. Designed signal conditioning circuitry showed high input impedance, low offset and good CMRR, therefore, it is possible to apply sensor and instrument signal conditioning circuitry.
Development of Model Based Battery SOC Indicator for Electric Vehicle
Lim, Y.C. ; Park, J.G. ; Ryoo, Y,J. ; Lee, H.S. ; Byun, S.C. ; Kim, E.S. ;
Journal of Sensor Science and Technology , volume 5, issue 6, 1996, Pages 35~42
In this paper, a development of model based battery SOC indicator is described. The proposed method is independent upon initial SOC, is reliable on the sudden change of load, and could estimate the available driving distance. The mathematical model of battery which has relation of the current, voltage and SOC estimates the SOC by least square estimation to minimize the error between measured voltage and estimated voltage. For experiment, the charging and discharging system using computer was designed to acquire the current and voltage data for model. The feasibility in electric vehicle was confirmed by variable load testing using the developed SOC indicator by stand-alone type microcontroller.
Advanced flame quality indicator for emission control
Kim, Jong-Won ; Lee, Sang-Ho ; Park, Kee-Bae ; Sim, Kyu-Sung ;
Journal of Sensor Science and Technology , volume 5, issue 6, 1996, Pages 43~50
It is very important to improve the combustion efficiency and reduce pollutant emission in order to save energy and environment. Especially, thermal NOx has been reduced through monitoring burner flame, because the thermal NOx is strongly related to flame characteristics. In this work, a flame-monitoring system was fabricated with photodiode, optical fiber, interference filter and data acquisition system, and it was applied to a lab-scale methane combustion system and a testing facility. Flame intensity and mean frequency increased with increasing turbulent intensity and fuel loading. The sensor signal from flame fluctuations differed from that without flame, which showed the availability af the flame scanner to find the presence of flame. NOx emissions increased with flame intensity.
Flow sensor using stress-balanced membrane and thin film thermocouple
Ahn, Yeong-Bae ; Kim, Jin-Sup ; Kim, Myung-Gyoo ; Lee, Jong-Hyun ; Lee, Jung-Hee ;
Journal of Sensor Science and Technology , volume 5, issue 6, 1996, Pages 51~59
A flow sensor has been fabricated by preparing thin film Pt-heater and Bi-Sb thermocouples array on 150 nm-
dielectric diaphragm which has low thermal conductivity and balanced stress with silicon substrate for the purpose of improving the thermal isolation between heater and silicon substrate. Pt-heater showed nonlinear I-V characteristics due to the thermal isolation effect of the diaphragm. Its temperature coefficient of resistance was about
and Seebeck coefficient of Bi-Sb thermocouple was about
. The sensor showed that thermoelectric voltage decreased as thermal conductivity of gas increased, and flow sensitivity increased as heater voltage increased or as the distance between heater and thermocouple decreased. When heater voltage was about 2.5 V,
-flow sensitivity and thermal response time of the sensor were about
and 0.13 sec., respectively.
Characterization of interfacial electrical properties in InSb MIS structure
Lee, Jae-Gon ; Choi, Sie-Young ;
Journal of Sensor Science and Technology , volume 5, issue 6, 1996, Pages 60~67
The interfacial electrical properties of InSb MIS structure with low temperature remote PECVD
have been characterized. The interlace-state density at mid-bandgap of the MIS structure was about
, when the
film was deposited at
. However, large amount of interlace states and trap states were observed in the MIS structure fabricated at temperatures above
. The time constant of
of interface states was extracted from G- V measurement. As the deposition temperature increased, the hysteresis of C- V curves were increased due to the high trap density.
Substrate effects of ZnO films deposited by rf magnetron sputtering
Kim, Y.J. ; Kwon, O.J. ; Yu, S.D. ; Kim, K.W. ;
Journal of Sensor Science and Technology , volume 5, issue 6, 1996, Pages 68~73
ZnO thin films were prepared on glass and (012) sapphire substrates by rf magnetron sputtering. Polycrysralline ZnO films with a (002) orientation were obtained on glass substrates. (110) ZnO films were epitaxially grown on the (012) sapphire substrates. Surface acoustic wave properties were also measured for propagating along the c axis of ZnO film on the glass and sapphire substrates. The phase velocities (
) on glass and sapphire substrate at center frequency were 2680 m/sec and 5980 m/sec and the effective coupling coefficient (
) on the 0th mode were 0.98 % and 1.43 %, respectively.
부록 : 1996년을 보내며
Kim, Gi-Wan ;
Journal of Sensor Science and Technology , volume 5, issue 6, 1996, Pages 74~74