• Journal of the Korea Institute of Information and Communication Engineering
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• v.16 no.10
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• pp.2335-2340
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• 2012

The detector is an uncooled detector system that functions inside the thermoelectric cooler (TEC) equipped with features instead of the cooler. The function of the thermoelectric device to control the temperature of the detector based on a function of temperature to prevent degradation of image quality to perform the role, the latest technology trend by removing the thermoelectric device size, cost a lot of effort to reduce has been studied. In this paper, It would be proposed of the actual test result using real chamber environment of for the best TECless algorithm as to minimize the degradation of image quality and obtain the low price of the uncooled detector.

• Journal of the Microelectronics and Packaging Society
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• v.11 no.3 s.32
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• pp.71-76
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• 2004

The power consumption of TEC for Laser diode cooling was predicted by 3-D FEM simulation and verified by experiment. The operating conditions such as power consumption of Laser diode, set temperature, ambient temperature, resistance of thermal path was considered to estimate the TEC power consumption. Using 3-D FEM simulation, the relation between TEC configuration defined by the pellet dimension and the number and power consumption was investigated for low power consumption scheme. As a result, as the thermal resistance of the pellet increased, the power consumption decreased.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 1999.04a
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• pp.24-24
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• 1999

This study addresses the effectiveness of TEC(Thermoelectric cooler) application for spacecraft thermal control. The required radiator area and power consumption characteristics of active thermal control using TEC are compared with the passive control at BOL and EOL through unsteady thermal analyses by calculating external heat fluxes. When the component operating temperature is low enough in TEC active control, the required radiator area can be smaller than the passive thermal control. TEC also needs less power consumption than the passive control under the condition that the temperature of cooling pars is low enough and/or the design temperature margin of the components is narrow enough.

• Journal of the Korea Society of Computer and Information
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• v.17 no.12
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• pp.41-47
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• 2012

Every object over $O^{\circ}K$ emits radiant energy based on its own temperature. Uncooled thermal imaging system displays the detected incident radiant energy as an image by signal processing. Recently, the uncooled thermal imaging system is applied to various areas such as medical, industrial, and military applications. Also, several researches are in progress to find new applications of the uncooled thermal imaging system. In this paper, we present effective method for controlling TEC-less detector in the uncooled thermal imaging system and also present the efficient control scheme for maximizing the accuracy of temperature measurement. The proposed scheme is to apply TEC-less and temperature detection algorithm in Uncooled thermal imaging system. In results of tests performed by using the actual chamber, we acquired images of better quality than the former system and temperature measurement accuracy was improved to less than $1^{\circ}C$.

• 제어로봇시스템학회:학술대회논문집
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• 2005.06a
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• pp.139-144
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• 2005

A rigorous research is underway in our team, for the design and development of high figure of merits (ZT= 1.5${\sim}$2.0) micro-thermoelectric coolers. This paper discusses the fabrication process that we are using for developing the $Sb_2Te_3-Bi_2Te_3$ micro-thermoelectric cooling modules. It describes how to obtain the mechanical properties of the thin film TEC elements and reports the results of an equation-based multiphysics modeling of the micro-TEC modules. In this study the thermoelectric thin films were deposited on Si substrates using co-sputtering method. The physical mechanical properties of the prepared films were measured by nanoindentation testing method while the thermal and electrical properties required for modeling were obtained from existing literature. A finite element model was developed using an equation-based multiphysics modeling by the commercial finite element code FEMLAB. The model was solved for different operating conditions. The temperature and the stress distributions in the P and N elements of the TEC as well as in the metal connector were obtained. The temperature distributions of the system obtained from simulation results showed good agreement with the analytical results existing in literature. In addition, it was found that the maximum stress in the system occurs at the bonding part of the TEC i.e. between the metal connectors and TE elements of the module.

• 제어로봇시스템학회:학술대회논문집
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• 1996.10b
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• pp.449-452
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• 1996

In this paper, a robust.adaptive control scheme is presented for precise trajectory tracking of nonholonomic mobile robots. In the controller, a set of desired trajectory is defined and used in constructing the control input which constitutes the main part of the proposed controller. The stable operating characteristics such as precise trajectory tracking, parameter estimation, disturbance suppression, tec., are shown through experiments as well as computer simulation.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 1999.11a
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• pp.543-551
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• 1999

본 연구는 광 전송 시스템에 레이저 다이오드의 안정되고 고정된 출력 파장의 광원을 제공하기 위한 것이다. 레이저 다이오드를 구동하기 위하여 안정된 정전류 회로를 설계하려 했으며, 레이저 다이오드 자체의 온도센서와 TEC(Thermo Electric Cooler)를 이용하여 레이저 다이오드 내부의 온도를 제어하는 온도 제어 회로를 구성하였다. 또한 광 출력에 Wavelength Locker를 이용하였다. 최종적으로 이들을 제어하기 위하여 A/D, D/A 컨버터와 마이크로 프로세서를 사용하였다.

• Proceedings of the KIEE Conference
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• 2011.07a
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• pp.1928-1929
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• 2011

무인항공기란(Unmanned Aerial Vehicle : UAV)란 일반적으로 조종사 없이 사전에 입력된 프로그램에 따라 또는 비행체 스스로 주위환경(장애물, 항로)을 인식하고 판단하여 자율 비행(Autonomous Flying)하는 비행체를 말한다. 본 논문에서는 항법센서(Attitude Heading Referance System: AHRS)를 비행제어 시스템과 통합한 시스템에 관하여 다루었다.

• 제어로봇시스템학회:학술대회논문집
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• 1992.10a
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• pp.887-891
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• 1992

In this study, it is developed the interactive DNC(Direct Numerical Control) system, in using RS-232C cable and auxiliary computer, through the diagnosis of planning process and information evaluation. this DNC system recognize the Manufacturing planning and control it. This DNC system has a different notation. It can be done by an operator who hasn't knowledge about personnel computer. It is operated with automatic planning and measurement tec. by operator, using part program on the NC(Numerical Control).

• Proceedings of the KIEE Conference
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• 1996.07b
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• pp.841-843
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• 1996

This paper presents efficient protection countermeasure against lightning and surge for the control & instrumentation equipment using TVSS(transient voltage surge suppressor) and TEC(transient earth clamp). We propose the zone protection technique with TVSS and the use of TEC for clearing potential difference between frame ground and signal ground.