• Title, Summary, Keyword: 적외선 신호

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Wireless Digital Bit Stream Communication System Using AV Infrared Communication System (AV용 적외선 송수신장치를 이용한 디지털 비트스트림 무선 통신 시스템)

  • 최덕규;한찬호;홍영호
    • Proceedings of the Korea Society for Industrial Systems Conference
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    • pp.217-223
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    • 2001
  • 본 논문에서는 기존의 AV용 적외선 송수신 시스템을 중간 매체로 이용하고, 그의 대역내에서 디지털 비트스트림을 고속으로 송수신할 수 있는 적외선 무선 데이터 통신 시스템을 제안 및 구현하였다. 제안한 시스템의 송신측에서는 디지털 비트스트림을 NTSC 비디오 신호 규격과 유사한 형태의 아날로그 신호로 변환하고, 이를 기존의 적외선 송신기로 무선 전송한다. 수신측에서는 기존의 적외선 수신기로 아날로그 신호를 수신하고, 이를 다시 디지털 비트스트림으로 변환한다. 본 논문의 결과는 다양한 AV시스템에서 적외선을 이용한 고속 무선 데이터 송수신에 응용될 수 있을 것이다.

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An Experimental Study of the Infrared Signal Characteristics on the S-Nozzle Plume of the Micro Turbojet Engine (마이크로 터보제트엔진 S형상 배기노즐 플룸의 적외선 신호 특성 실험연구)

  • Kim, Sunmi;Lee, Jeonseok;Choi, Seongman;Myoung, Rho-Shin;Kim, Woncheol
    • Proceedings of the Korean Society of Propulsion Engineers Conference
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    • pp.583-586
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    • 2017
  • Infrared signal measurement are conducted from a micro-turbo jet engine with different nozzle configurations. The conventional cone type, a S-shaped type with aspect ratio 5.2 and five rectangular type nozzle with different aspect ratios are used for this experiment work. The result show that infrared signal from the exhaust gas decrease as the aspect ratio increase. In case of S-shaped nozzle, the maximum infrared signal is reduced about 28.4% when compared of rectangular nozzle with aspect ratio 5(AR5).

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Development of a Generalized Software for IR Image Generation and Analysis (적외선 영상 생성 및 분석을 위한 종합 소프트웨어 개발)

  • Han, Kuk-Il;Kim, Do-Hwi;Choi, Jun-Hyuk;Ha, Nam-Koo;Jang, Hyun-Sung;Kim, Tae-Kuk
    • KIISE Transactions on Computing Practices
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    • v.23 no.3
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    • pp.141-147
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    • 2017
  • Recently there has been an increasing demand for developing a domestic software (S/W) for infrared signature generation to prevent technology leakage and match the domestic operating environment. In this study, we developed a S/W for infrared signature generation and presented its structures and functions for creating and analyzing the IR images of designated spectral bands. The proposed S/W generates IR images of an object through calculations of surface temperatures and IR signals including the self-emitted, surface reflected and path dependent radiances. Moreover, the proposed S/W includes the features of infrared threat analyses from the generated IR images including the infrared contrast radiant intensity (CRI), detection ranges or detection probability analyses, unlike the imported, commercial infrared signature generation S/W.

Numerical and Experimental Study on Infrared Signature of Solid Rocket Motor (고체로켓모터의 적외선 신호에 관한 수치적·실험적 연구)

  • Kim, Sangmin;Kim, Mintaek;Song, Soonho;Baek, Gookhyun;Yoon, Woongsup
    • Journal of the Korean Society of Propulsion Engineers
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    • v.18 no.5
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    • pp.62-69
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    • 2014
  • Infrared signature of rocket plume plays an important role for detection, recognition, tracking and minimzing for low observability. Infrared signatures of rocket plume with reduced smoke propellant and smokeless propellant are measured. In order to estimate the infrared signature of rocket plume, CFD analysis for flow structure of plume is performed, and layered integration method for estimating of infrared signature is used. Numerical and experimental results were in good agreement. Both propellants had similar infrared signature. Strong peak at $4.3{\mu}m$ region in the experimental results is appeared due to experimental error arising from the calibration procedure.

Experimental Study of a Micro Turbo Jet Engine Performance and IR Signal with Nozzle Configuration (배기노즐 형상변화에 따른 마이크로 터보제트 엔진의 성능 및 적외선신호 실험연구)

  • Park, Gyusang;Kim, Sunmi;Choi, Seongman;Myoung, Rho-Shin;Kim, Woncheol
    • Journal of the Korean Society of Propulsion Engineers
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    • v.20 no.5
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    • pp.1-8
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    • 2016
  • Micro turbojet engine test and infrared signal measurement were conducted to understand the characteristics of the engine performance and infrared signal with the variants of the exhaust nozzle configuration. A cone type nozzle and five rectangle type nozzles which has aspect ratio from one to five were used for the experimental work. The results show that there are not much difference between cone and rectangle nozzles of the thrust and specific fuel consumption. However infrared signal from exhaust gas become smaller as increasing aspect ratio.

Software Remote Control System With InfraRed (적외선을 이용한 소프트웨어 원격제어 시스템)

  • 임인채
    • Proceedings of the Korea Society for Industrial Systems Conference
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    • pp.135-139
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    • 2004
  • 본 연구에서는 소프트웨어를 원격제어 하기 위해 상용화된 적외선 수신부의 회로를 변경하여 컴퓨터의 직렬포트와 통신이 가능하도록 MAX232 ONE-CHIP 컴퓨터를 이용한 수신부를 개발하고, 컴퓨터에서 리모컨의 적외선 수신이 가능한 직렬통신 프로그램을 개발한다. 아울러 수신된 적외선 신호를 일반 응용 프로그램에서 적용이 가능한 형태로 신호를 변환한 다음 각종 응용 소프트웨어에 적용이 가능하도록 한다.

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A Study on the Effect of Engine Nozzle Configuration on the Plume IR Signature (엔진 노즐 형상이 Plume 적외선 신호에 미치는 영향에 관한 연구)

  • An, Sung-Yong;Kim, Won-Cheol;Oh, Seong-Hwan
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.40 no.8
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    • pp.688-694
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    • 2012
  • A study on the effect of engine nozzle configuration on the engine plume Infra-red (IR) signature characteristics is performed. Configuration design of an engine nozzle with high aspect ratio to reduce IR signature level and a cylindrical nozzle which is typically used for conventional aircraft which does not require IR signature reduction is performed. And CFD analysis for the two nozzles is performed to compare the flowfields characteristics of the two nozzles. Finally IR signature analysis for the two nozzles is accomplished to calculate the total intensity level at mid-wave infra-red and investigate the differences of IR signature characteristics between the two nozzles.

Thermal Signature Characteristics of Clothed Human Considering Thermoregulation Effects (체온 조절 작용을 고려한 의복 착용 시의 인체 열상신호 특성 분석)

  • Chang, Injoong;Bae, Ji-Yeul;Lee, Namkyu;Kwak, Hwykuen;Cho, Hyung Hee
    • Journal of the Computational Structural Engineering Institute of Korea
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    • v.32 no.2
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    • pp.109-116
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    • 2019
  • Survivability of soldiers has been greatly threatened by the development of thermal observation device(TOD). Therefore, infrared, especially thermal, stealth technology is applied to combat suit to avoid detection from TOD. In this study, prior to the thermal camouflage performance evaluation of combat suit, thermal signature characteristic from clothed the human body was analyzed considering the realistic condition for human surface temperature compared to that from unclothed human body. To get the realistic surface temperature distribution of human, thermoregulation and multi-layer skin structure model is applied to the human model. Based on temperature distribution, surface diffuse radiance in thermal range is calculated and by assuming the background conditions, contrast radiance intensity(CRI) characteristic of human body is analyzed. By wearing clothing, the CRI between background and human body became reduced in low emissive background but in high emissive background, the contrast is much more prominent. Therefore, this issue should be considered in design process of thermal camouflage combat suit.

Agent System for Remote Control with Software (소프트웨어 원격 제어를 위한 에이전트시스템)

  • 임인채
    • Proceedings of the Korea Association of Information Systems Conference
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    • pp.283-288
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    • 2002
  • 본 연구에서는 소프트웨어를 원격 제어하기 위해 상용화된 적외선 수신부의 회로를 변경하여 컴퓨터의 직렬포트와 통신이 가능하도록 MAX232를 이용한 수신부를 개발하고, 컴퓨터에서 리모컨의 적외선 수신이 가능한 직렬통신 프로그램을 개발한다. 아울러 수신된 적외선신호를 일반 응용프로그램에서 적용이 가능한 형태로 신호를 변환한 다음 산업체 현장에서의 각종 응용소프트웨어에 적용 할 수 있도록 한다.

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Analysis of Flow and Infrared Signature Characteristics according to UCAV Nozzle Shape (무인전투기 배기구 형상에 따른 유동 및 적외선 신호 특성 분석)

  • Noh, Sooyoung;Bae, Ji-Yeul;Kim, Jihyuk;Nam, Juyeong;Jo, Hana;Cho, Hyung Hee
    • Journal of the Korean Society of Propulsion Engineers
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    • v.23 no.5
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    • pp.27-35
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    • 2019
  • Stealth technology is a technique to avoid detection from detectors such as radar and infrared seekers. In particular, detection by infrared signature is more threatening because infrared missiles detect heat from the aircraft itself. Therefore, infrared stealth technology is essential for ensuring the survival of aircraft and unmanned combat aerial vehicles (UCAV). In this study, we analyzed aerodynamic and infrared stealth performance in relation to UCAV nozzle design. Based on simulation results, a double serpentine nozzle was effective in reducing the infrared signature because it could shield high-temperature components in the engine. In addition, we observed that the infrared signature was reduced at the turning position of the duct located at the rear part of the double serpentine nozzle.