• 대한기계학회논문집B
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• 제20권1호
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• pp.295-303
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• 1996

A new temperature compensation technique for hot-wire anemometer is proposed in this article. In contrast to the available compensation techniques, a photoconductive cell is introduced here as a variable resistor in the bridge. The major advantage of adopting an active component such as photoconductive cell is that temperature compensation can be achieved by using any kind of temperature sensors, once the output of temperature sensor is given as a voltage. Thereby, the temperature compensation can be made automatically and intelligently by a computer software or a hardware device. Validation experiments using a photoconductive cell with a thermocouple-thermometer are conducted in the temperature range from 3$0^{\circ}C$ to 5$0^{\circ}C$ and the velocity ranges from 8 m/s to 18 m/s.

• 대한전자공학회논문지
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• 제27권4호
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• pp.563-570
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• 1990

A silicon pressure sensor made of a full bridge of diffused resistors was designed and fabricated using semiconductor integrated circuit process. Thin diaphragms with 30\ulcorner thickness were obtained using anisotropic wet chemical etching technique. Our device showed strong temperature dependence. Compensation networks are used to compensate for the temperature dependence of the pressure sensor. The bridge supply voltage having positive temperature coefficient by compensation networks was utilized against the negative temperature coefficient of bridge output voltage. The sensitivity fluctuation of pressure sensor before temperature compensation was -1700 ppm/\ulcorner, while it reduced to -710ppm\ulcorner with temperature compensation. Our result shows that the we could develop accurate and reliable pressure sensor over a wide temperature range(-20\ulcorner~50\ulcorner).

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2008년도 International Meeting on Information Display
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• pp.1401-1404
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• 2008

Temperature Compensation Method of Local Dimming LED Backlight System is proposed. The luminance levels of the LED backlight are not stable over temperature and time due to the inherent characteristics of the LED. The characteristics of LED backlight are investigated and a temperature compensation method is presented. The image distortion caused by temperature variation of LED block can be effectively compensated by the proposed temperature compensation method.

• 센서학회지
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• 제17권3호
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• pp.223-228
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• 2008

A more accurate method of measuring the electrical conductivity (L) of solutions was developed by applying dynamic temperature compensation for measurement of L. Temperature changes of a sample were induced by a heater probe and the changes in L per unit temperature were measured. An equation for L with respect to temperature change was developed and L at the standard temperature ($25^{\circ}C$) was computed. Based on our proposed method, it is possible to have temperature compensation without having the temperature coefficients in advance.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1998년도 추계학술대회 논문집 학회본부 B
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• pp.403-406
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• 1998

There are two cases of error occurrence of STT(Smart Temperature Transmitter). One is that because of unstable reference voltage, data from A/D converter is not reliable. The other is that because of change of room temperature, this change affects conversion of A/D converter. In this paper, we show algorithms be adapted to STT for reliable conversion of A/D converter through a experiment and compensation for temperature change. In a experiment, we collect data from reference voltage and ground then calculate nominal value of these at constant temperature during A/D converter initialization or at any conversion time. Algorithm for compensation for unstable reference voltage calculates a correction factor and adapts it to compensation for malfunction of A/D converter. Algorithm for compensation for variation of room temperature is come from linearization of thermistor but is adapted to zener diode, not thermistor, therefor we have less effort for compensation for temperature and have a idea that it can be adapted to A/D converter system.

• 한국산업융합학회 논문집
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• 제3권2호
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• pp.149-154
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• 2000

The purpose of this study is to measure the compression temperature in cylinder by using the fine thermocouple. As for using the thermocouple, it's response time delay should be regarded, even if it is a fine one. So, the output of thermocouple needs some compensation. The compensation circuit, which consists of a differential and an adding circuit is used for the compensate the time lag. And the time constant of the compensation circuit is determined the time between the TDC and the maximum point of the thermocouple output. Using this compensation circuit, the compression temperature is investigated of the cylinder in the diesel engine.

• 한국방재학회 논문집
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• 제8권6호
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• pp.1-5
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• 2008

피복이 없는 FBG센서는 내구성이 매우 약하기 때문에 FBG센서 주위의 피복이 없이는, 많은 변수가 존재하는 실제 자연환경에서의 정확한 데이터수집이 어렵다. Steel sleeve packaged FBG 변형률 센서는 토목공학에서 널리 사용되고 있는 센서 중 하나이다. 변형률과 온도가 동시에 측정되는 FBG센서의 도입 이후로, 변형률과 온도의 정확한 보정은 필수적인 과정이 되었다. 이 논문에서는 FBG의 변형률과 온도의 측정 원리에 기초하여 steel sleeve packaged FBG센서의 온도보정 기술을 도출하였다. 그리고 두개의 FBG센서를 이용한 콘크리트 초기재령의 건조수축 실험을 통해 온도보정의 실행 가능성을 확인하였다.

• 대한기계학회논문집B
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• 제20권11호
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• pp.3666-3675
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• 1996

A new hardware temperature compensation method for hot-wire anemometer is investigated and an analog compensating circuit is proposed in this article. A photoconductive cell is introduced here as a variable resistor in the anemometer bridge and the linearized output of a thermistor is used to monitor the input of the photoconductive cell. In contrast with the conventional method, any type of temperature sensor can be used for compensation if once the output of thermometer varies linearly with temperature. So the present technique can diversify the compensating means from a conventional passive compensating resistance to currently available thermometers. Because the resistance of a photoconductive cell can be set precisely by adopting a stabilizing circuit whose operation is based on the integration function of the operational amplifier, the accuracy of compensation can be enhanced. As an example of linearized thermometer, thermistor sensor whose output is linearized by a series resistor was used to monitor the fluid temperature variation. Validation experiment is conducted in the temperature ranged from 30 deg. C to 60 deg. C and the velocity up to 40 m/s. It is found that the present technique can be adopted as a compensating circuit for anemometer and hot-wire type airflow meter.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2000년도 하계학술대회 논문집 D
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• pp.2365-2367
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• 2000

The deterministic errors of semiconductor gyros and accelerometers must be estimated and compensated to develop the low-cost IMU using them. Generally, the dominant errors of the low-cost IMU are bias and misalignment errors. Bias is sensitive to temperature. Therefore, in this paper, the effect on temperature of bias is analyzed and temperature compensation are carryed out. It is shown by experiment that the compensation is efficient.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2008년도 추계 학술발표회 제20권2호
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• pp.805-808
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• 2008

피복이 없는 FBG센서는 내구성이 약하기 때문에, 실제 토목구조물에서는 적용이 어렵다. 따라서 packaged FBG센서는 피복이 없는 FBG센서의 단점을 보안하고, 실제 구조물에 적용이 가능하도록 발전된 형태이다. 이런 packaged FBG센서를 이용하여 변형률과 온도를 동시에 측정할 때, 온도보정은 없어서는 안 될, 필수적 기술이다. 이 논문에서는 steel sleeve packaged FBG센서의 온도보정 기술을 도출하고, 콘크리트 보부재를 이용한 실험을 통해 온도보정 기술의 현장적용 가능성을 제시하였다. 따라서 이 논문에서 사용된 온도보정 기술은 실제 여러 토목구조물의 모니터링에 확대 사용할 수 있다.