• Title/Summary/Keyword: 온도보상

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An Improved Temperature Compensation of a Load Cell (로드 셀의 개선된 온도보상)

  • 김진배;정선태
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1994.10a
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    • pp.365-370
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    • 1994
  • 로드 셀의 정밀측정 에러의 가장 큰 요인은 온도에 의한 출력특성 변화이다. 본 논문에서는 주어진 어떤 온도 구간에서만 온도특성을 보상하였던 기존의 방법에 비해 보다 넓은 온도구간에서 로드 셀의 출력의 온도 특성을 보상하고 또한 출력의 온도 특성이 기존의 방식에 의한 것보다 개선된 새로운 로드셀의 온도보상 방법을 제안 하였다.

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Implementation of the Burst Mode Fiber Optic Transmitter by Digital Temperature Compensation Architecture (디지털 온도보상에 의한 버스트 모드 광송신기의 구현)

  • Kang, Ho-Yong;Chai, Sang-Hoon
    • Journal of the Institute of Electronics Engineers of Korea SD
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    • v.46 no.8
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    • pp.12-17
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    • 2009
  • We have implement어 a bust mode optical transmitter using digital temperature compensation architecture with a microprocessor. Instead of previous analog real time technique, we used digital sampling and holding technique for the temperature compensation in order to get stable high speed data transmission of the laser diode. This digital temperature compensation technique should be complemented the previous analog method with accuracy and effectiveness in the over Gb/s transmitting application.

Design of Temperature-Compensation Circuits of Ku-band Amplifiers for Satellite Payload (위성중계기용 Ku-대역 증폭기의 온도보상회로 설계)

  • 장병준;염인복;이성팔
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.13 no.10
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    • pp.1025-1033
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    • 2002
  • This paper presents temperature-compensation circuits of Ku-band amplifiers for satellite payload. After carefully investigating design specifications of Ku-band amplifiers for satellite payload, we designed three types or temperature-compensation circuits, which are an active bias circuit, an attenuator control, and an ALC loop circuit. Our design technique demonstrates good agreement between measured and predicted results. These temperature-compensation circuits are suitable for Ku-band satellite payload active components, such as channel amplifiers, LNA and IF amplifiers.

Design of Temperature Compensation Circuit to Compensate Temperature Characteristics of VCO (VCO의 온도 특성 보상을 위한 온도 보상 회로의 설계)

  • Kim, Byung-Chul;Huang, Gui-Hua;Cho, Kyung-Rae;Lee, Jae-Buom
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.21 no.3
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    • pp.223-228
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    • 2010
  • In this paper, temperature compensation circuit for the X-band voltage controlled oscillator(VCO) is presented by using the temperature sensor with the OP-AMP circuit. The frequency drifting by the temperature could be compensated by applying the tuning voltage which include the linearly changing output voltage of the temperature sensor. As a result, the frequency variation is reduced to 6.6~4.4 MHzfrom the 71~73 MHz variation with the compensation circuit over -30~+$60^{\circ}C$ range, when VCO is operated in the frequency range of 9.95~10.05 GHz.

Temperature Compensation of Hot-film Flow Sensor (박막 히터형 유량센서의 온도보상)

  • Kim, Hyung-Pyo
    • Journal of Sensor Science and Technology
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    • v.9 no.4
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    • pp.268-273
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    • 2000
  • This paper represents a hot-film flow sensor which is compensated by a noble temperature compensation method using the initial unbalanced voltage. The resistance value of the sensor is determined by using the graph of the initial unbalanced voltage of an open-loop circuit against the air temperature. The compensation is accomplished by applying the unbalanced ratio of the resistors in the Wheastone bridge circuit. In the range of air temperature of $-20^{\circ}C{\sim}120^{\circ}C$, the error is about ${\pm}1%$.

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Thermal Compensation Circuit with Improved Compensation Characteristic for Power Amplifier (개선된 보상특성을 갖는 증폭기용 온도보상회로)

  • Jung, Young-Bae
    • Journal of IKEEE
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    • v.16 no.3
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    • pp.177-181
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    • 2012
  • This paper introduces a thermal compensation circuit with improved compensation characteristic for amplifiers to provide stable output power regardless environmental temperature. The proposed thermal compensation circuit is composed of two branchline couplers having two diodes between them. And, the thermistor whose resistance varies significantly with temperature inversely and a operational amplifiers, so called as OP-amp, control the diodes in the compensations circuit to realize more effective thermal compendation characteristic compared with conventional circuit.

A study on temperature compensation characteristic of optical current sensor for GIS (GIS용 광 CT의 온도보상 특성에 관한 연구)

  • Park, Jung-Hwan;Song, Hyun-Jig;Park, Won-Zoo;Lee, Kwang-Sik;Kim, Min-Soo;Kim, Jung-Bae
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • 2005.11a
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    • pp.285-288
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    • 2005
  • 현재 국내 외에서 GIS용 광 CT가 활발히 연구 개발되고 있다. 이러한 광 CT는 전류와 온도의 변화에 따른 오차가 발생하는데 온도특성을 고려하여 온도변화에 따른 출력신호의 오차를 감소시키고 전류를 더욱 정밀하고 안정적으로 측정 가능하도록 온도보상 시스템이 필요하다. 본 논문에서는 온도보상 시스템 연구를 위한 광 CT의 온도보상 특성에 대한 연구 계획을 기술하였다.

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Digital Predistortion Algorithm using Techniques of Temperature Compensation (온도보상 기법을 적용한 디지털 방식의 사전 왜곡제거기 알고리듬)

  • Ko, Young-En;Bang, Sung-Il
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.42 no.9 s.339
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    • pp.1-10
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    • 2005
  • In this paper, we proposed predistortion algerian that can compensate temperature distortion by digital. Predistortion algorithm produces compensation value of distortion by temperature as well as system nonlinear distortion by input level, and warps beforehand signal of baseband. To prove excellency of such algorithm we applied predistortion algorithm to Saleh's high power amplifier model, and did computer simulation. As a result, P1dB increased about 0.5 dBm phase shift reduced about $0.8^{o}$ than existent the A&P PD, and predistiortion algorithm to apply temperature compensation techniques improved P1dB about 2dBm and stabilized phase shift by about $0.1^{o}$ low. When approved UMTS's sample signal to this amplifier, IMD3 of amplifier decreased 10dBm than is no temperature compensation techniques, and reduced 19dBm than signal that is no distortion.

스트레인 게이지의 온도특성과 극저온 환경에서의 거동

  • 주진원
    • Journal of the KSME
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    • v.32 no.6
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    • pp.514-523
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    • 1992
  • 스트레인 게이지를 이용하여 변형측정을 할 때 온도변화의 영향으로 나타나는 겉보기 변형도와 게이지 상수의 변화에 대하여 설명하였고 실제 측정시 정확한 측정값을 얻기위한 온도보상 방 법에 대하여 기술하였다. 온도변화에 의한 겉보기 변형도의 값은 기계적 하중에 의한 변형도에 비하여 무시할 수 없는 큰 값을 나타내기 때문에 적절한 보상에 의하여 정확한 측정값을 얻어 내야 한다. 항공우주산업, 원자력산업 등의 분야에서 널리 응용되는 극저온 환경에서 겉보기 변 형도와 게이지 상수의 측정결과를 제시하였다. 극저온에서는 자체 온도보상된 스트레인 게이지라 할지라도 대단히 큰 온도영향을 받기 때문에 본시험에서 제시한 바와 같이 측정결과를 온도보 상하여 처리해야만 의미있는 결과를 얻을 수 있다. 본 시험에서 4차식으로 구해진 겉보기 변형 도에 대한 특성곡선과 게이지 상수에 대한 시험결과는 극저온에서 변형을 측정할 때 직접적으로 보상하여 사용될 수 있다.

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A Study on Temperature Compensation of Burst Mode Fiber Optic Transmitter using Digital Architecture (버스트 모드 광송신기의 디지털 방식에 의한 온도보상에 관한 연구)

  • Chai, Sang-Hoon;Kim, Dong-Gyu
    • Journal of the Institute of Electronics Engineers of Korea SD
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    • v.44 no.11
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    • pp.36-42
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    • 2007
  • In this paper, we have studied temperature compensation architecture for a bust mode optical transmitter to convert the electric burst mode date signal to a optical one through the laser diode. In order to get stable high speed data transmission, we used digital sampling technique with a microprocessor for the temperature compensation of the laser diode, not the previous real time analog technique. Though the digital automatic power control circuit should be complemented the previous analog one with accuracy and effectiveness. So the digital technique will be more effective in further future in development for the over Gb/s transmitting speed.