• Journal of the Korean Institute of Gas
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• v.15 no.4
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• pp.51-55
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• 2011

This paper describes the temperature compensation algorithm using thermopile detector for nondispersive infrared methane gas sensor. From the output voltage of thermistor that is attached onto the infrared detector, the ambient temperature was extracted. The effects of temperatures on the properties of sensor module (the characteristics of narrow bandpass filter, optical cavity and infrared lamp, and gas absorption coefficient times optical path length) have been introduced in order to implement the temperature compensation algorithm. Even though the measurement error of developed sensor module was in the range of $\pm$ 1,500 ppm, after programming the temperature compensation algorithm, the developed sensor module shows a high accuracy less than +180 ppm error within $20^{\circ}C$ temperature variation.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2013.05a
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• pp.141-143
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• 2013

Portable radiation detection devices currently available, there are a lot of functional constraints. In order to solve these drawbacks, research has been done on a portable radiation detection device based on the Android platform. Since the early stages of research, it is possible to measure the radiation, but The accuracy is worse than the product being sold. Portable radiation detection device based on the Android platform, the error occurs when the temperature changes. Temperature compensation algorithm was implemented to improve accuracy by eliminating errors due to temperature changes.

• Journal of IKEEE
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• v.25 no.2
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• pp.261-266
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• 2021

This paper suggests design methodology for thermal infrared data correction algorithms considering environmental temperature variations. First, a thermal infrared measurement model is suggested by a parameter-dependent first-order input-output equation using the relationship between infrared measurement data and model environmental parameters. In order to compensate the influence of environmental temperatures on infrared data, a compensation function is identified. Through experiments, the proposed algorithm is shown to reduce the influence of environmental temperatures on the infrared data effectively.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.17 no.11
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• pp.2729-2735
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• 2013

Safety and security system have been internationally enhanced in a field of shipping logistics. Accordingly, techniques for safety and security have been studied steadily. The need of portable radiation detection device is increasing by the search of the container is enhanced. In this paper, we propose to study on the application of the temperature compensation algorithm to the platform to improve the accuracy and the realization of portable radiation detection device based on Cortex-A9. Analog board deforms signal output from the sensor. And Cortex-A9 platform analyzes the signal received and displays the results. Additionally we use the temperature compensation algorithm and thereby we ca look the same results even if the temperature changes.

• Proceedings of the KIPE Conference
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• 2017.11a
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• pp.19-20
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• 2017

본 논문에서는 자성체 및 비자성체 용기 판별이 가능하고 워킹코일 온도 변화가 고려된 All Metal IH(Induction Heating) 제어 알고리즘을 설계한다. 용기 재질과 위치에 따른 파라미터를 분석하여 전력 Curve-fitting 모델링을 통해 용기 판별을 수행하고 비자성체 가열 시 급상하는 워킹코일 온도를 반영하여 변화하는 전력 제어 알고리즘을 보상한다. 설계된 All Metal IH 제어 알고리즘은 실험을 통해 검증한다.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.21 no.7
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• pp.54-60
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• 2007

We constructed a fiber-optic temperature sensor system using a sensor array with 15 fiber Bragg gratings for distributed temperature monitoring in electrical power systems. A polynomial fitting algorithm was used to compensate the nonlinear action of the MEMS tuneable wavelength filter used for Bragg wavelength demodulation Fixed passband wavelengths from a Fabry-Perot ITU filter were used as reference wavelengths for the fitting algorithm which obtained constant accuracy regardless of the wavelength scanning range and frequency. About 0.18[%] of linearity error compared to reference thermocouple thermometer has been obtained in the preliminary experimental results.

• Proceedings of the KIPE Conference
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• 2013.07a
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• pp.510-511
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• 2013

3상 인버터 출력단 센싱에 옵셋이 발생할 경우 DC 전류에 출력 주파수에 해당하는 리플 성분이 발생하게 된다. 리플의 크기는 옵셋의 크기에 비례하여 커지게 된다. 센싱 단자 등의 H/W적인 문제로 옵셋이 발생할 경우 DQ축 전류 및 DC 전류에 리플이 발생하게 되고 이는 필터 리액터, 변압기 등의 온도 상승 및 IGBT Stack의 온도 상승 등 인버터 시스템에 악영향을 유발시킬 뿐만 아니라 DC 소스원에도 악영향을 발생시킬 가능성이 존재한다. 따라서, 본 논문에서는 옵셋의 영향을 줄여 시스템을 안정적으로 동작시키기 위해 옵셋 보상 방법을 제안하였다.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.23 no.12
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• pp.10-22
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• 2009

This paper presents an LED lighting system with an LED color control algorithm that can independently change its color temperature and illuminance. To show the validity of the proposed algorithm, it is proven that its solution always exists. The proposed algorithm was applied to the control of an LED module that is composed of red, green, blue, and white (RGBW) LEDs. Its color temperature variation ranged from 3,500~7,500[$^{\circ}K$], and its illuminance ranges from 500~1,500[lux]. Within these range, the color temperature and illuminance deviations are as low as $\pm0.8$[%] when the junction temperature of LEDs are maintained at 40[$^{\circ}C$]. In the range of 30~70[$^{\circ}C$], the measured illuminance and color temperature deviations are as low as 2.1[%] and 3.6[%], and the compensated ones are as low as 1[%] and 0.49[%], when the desired illuminance and color temperature are 1,000[lux] and 6,500[$^{\circ}K$], respectively.nyang.ac.kr).

• Journal of the Institute of Electronics Engineers of Korea SD
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• v.45 no.11
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• pp.63-70
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• 2008

In this paper, a smart sensor system for the MEMS pressure sensor was developed. A compensation algorithm and programmable calibration circuits were presented to eliminate errors caused by temperature drift of piezoresistive pressure sensors in itself. This system consisted of signal conditioning, calibration, temperature detection, microprocessor, and communication parts and these were integrated into a SOC. A RS-232 interface was employed for monitoring and control of a smart sensor system. The area of fabricated IC is $4.38{\times}3.78\;mm^2$ and a $0.35{\mu}m$ high voltage CMOS process was used. Compensation error for temperature drift of 50 KPa pressure sensors was measured into ${\pm}0.48%$ in the range of $-40^{\circ}C{\sim}150^{\circ}C$. Total power consumption was 30.5 mW.

• Journal of the KSME
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• v.34 no.3
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• pp.185-192
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• 1994

공작기계 및 측정기계 등은 여러 가지 요인에 의해서 오차를 갖게 되지만, 이들이 갖는 계통오 차는 정밀한 측정과 보정알고리즘에 의해 보정이 가능하다. 보정을 위한 측정방법은 여러 가지가 있지만 측정정밀도가 높은 헤트로다인레이저간섭계가 가장 많이 사용되고 잇다. 따라서 이글에 서는 헤트로다인레이저간섭계의 측정원리와 측정방법과 그 응용예를 소개하였다. 헤트로다인레 이저간섭계는 외부광학기를 교체하여 측정 가능한 길이, 각도, 진직도의 측정이 가능하므로 이 들에 대한 원리와 사용방법을 소개하였으며, 실예로 본 연구소에서 사용중인 제품과 개발한 제 품에 적용하여 시스템 오차의 측정방법과 보정방법을 통해 시스템의 정밀도가 향상됨을 보여 주었다. 헤트로다인레이저간섭계를 이용하여 측정시에도 측정기 자체가 갖고 있는 오차요인 즉, 빛의 속도가 일정하지 않고 공기의 습도, 온도 및 압력에 의해 결정되는 파장변화에 의한 오차와 피측정물의 온도변화에 의한 오차 등을 고려하여야 한다. 이런 이유로 측정시에는 센서를 사용 하여 현재 환경에 대한 영향을 자동으로 보상하든지 수동으로 온도 및 파장의 값을 기입하여 보정을 실시하여야 한다.