• 국제학술발표논문집
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• The 9th International Conference on Construction Engineering and Project Management
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• pp.705-711
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• 2022

Roadway lighting is an integral element of a highway system. Luminaires on roadways provide viewing conditions for drivers and pedestrians during nighttime in order to improve safety. It is time-consuming and labor-intensive to manually measure roadway illuminance at predetermined spots with a handheld illuminance meter. To improve the efficiency of illuminance measurement, a remote-control electrical cart and a drone were utilized to carry an illuminance meter for the measurements. The measurements were performed on the marked grid points along the pavement. To measure the illuminance manually, one person measures illuminance at each grid point with the handheld meter and another person records the illuminance value. To measure the illuminance with the remote-control cart, the illuminance meter is attached to the cart and it measures illuminance values continuously as the cart moves along the grid lines. With the drone, the meter records the illuminance continuously as the drone carries the meter and flies along the grid line. Because the drone can fly at different heights, the measurements can be done at different altitudes. The illuminance measurements using the cart and the drone are described in detail and compared with manual measurements in this paper. It is shown through this study that automated measurements can greatly improve the efficiency of roadway illuminance data measurements.

• 대한설비관리학회지
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• 제23권4호
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• pp.51-56
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• 2018

Computed tomography (CT) scan room in the department of radiology is very necessary to maintain pleasant and proper illuminance to relieve fatigue and inconvenience because it affects the work environment to the radiologist. Accordingly, this paper describes the method for measurement of illuminance that exposed to an environmental elements in a CT scan room of the hospital. Therefore, the purpose of this paper is to propose an optimal environment of CT scan room based on the measurement of illuminance. In addition, the 5 point method by KS C7612 was applied to measure the illuminance with illuminometer (Unfors xi light probe) in the CT scan room. In result of this paper, minimum value and maximum value of illuminance in the CT scan room was measured 212.7 lux and 354.8 lux, respectively. The illuminance of CT scan room was lower than KS A 3011. Finally, the work environment in CT scan room should provide higher illuminance for the comfortable environment of radiologists and patients.

• KIEAE Journal
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• 제10권6호
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• pp.41-46
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• 2010

This study is to validate the K University daylight measurement system according to the CIE guide of recommended practice of daylight measurement. In this study global irradiance, illuminance, direct normal illuminance, diffuse irradiance, illuminance and vertical illuminances(North, West, South, East) were measured and compared in accordance with the CIE quality control test. Field monitoring was conducted from 1st August to 15th August 2010. Results for the CIE tests 1 to 4 showed an accuracy of 100%. This indicates that the K University daylight measurement system is reliable and the measurement data would be useful for further daylight researches.

• 조명전기설비학회논문지
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• 제20권5호
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• pp.1-8
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• 2006

일반적으로 공동주택의 조도를 측정하여 공간의 평균조도를 분석할 때 KS 5점법과 IES 4점법의 조도측정 및 평균조도 산출방법을 적용한다. 이 측정 방법들은 각각 측정점이 달라 평균값에 차이가 발생하기 때문에 정확한 분석을 위하여 공간의 특성과 재실자들의 활동을 고려하여 선택적으로 적용되어야 한다. 그래서 본 연구에서는 측정된 조도값과 시뮬레이션값을 비교함으로써 평균조도 산출법을 객관적으로 평가하였다. KS 5점법은 조명기구의 직하부 조도를 최대한으로 고려한 측정법으로 국부조도 평가에 적합하며, IES 4점법은 공간의 최대 및 최소 조도값의 배제를 통해 평균적 개념에 더욱 접근한 방법이라 할 수 있다.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 1989년도 추계학술발표회논문집
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• pp.31-36
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• 1989

Low-cost and automated isolux diagram measurement system are investigated. The system is constructed with illuminance measurement array, analog multiplexer, A/D converter and 16-bit microcomputer. The experimental results show good agreement with the measured illuminance values. Decreasing the measure-spacing, the more accurate diagram can be obtained.

• 반도체디스플레이기술학회지
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• 제18권3호
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• pp.60-65
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• 2019

In this paper, the hybrid illumination system for effectively detecting surface defects in steel plate with lowcontrast, non-uniformity and featureless is designed based on illuminance uniformity. First of all, characteristics of steel plate defects were considered and typical inspection illumination system is implemented. Optimum illumination parameters for uniformly illuminating an inspection area in the typical illumination system are selected based on the illuminance uniformity and illuminance distribution measurement. The illuminance uniformity and illuminance distribution are measured using an illuminometer based on the arduino. Through illuminance distribution analysis of the typical illumination, an hybrid illumination is designed by fusing bi-directional illumination and coaxial illumination. The hybrid illumination showed higher uniformity ratio and illuminance distribution than the typical illuminations. The hybrid illumination system showed the ability to uniformly illuminate the entire inspection region of steel plate surface.

• 조명전기설비학회논문지
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• 제22권1호
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• pp.1-6
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• 2008

도로조명의 적절한 보수를 위하여, 조명 수준을 정확하게 파악하는 것이 매우 중요하다. 본 논문에서는 2분할 수광방식을 고안하여, 차량을 이용한 조도측정시스템을 개발하였다. 이 시스템은 넓지 않은 면적을 차지하고 도로의 흐름을 차단하지 않고 신속하고 신뢰성 높은 데이터를 자동으로 측정 저장할 수 있다. 따라서 도로조명 측정에서 많은 비용과 시간을 절약할 수 있다.

• 한국항공운항학회지
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• 제24권1호
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• pp.25-32
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• 2016

This study deals with the light environments and weather conditions affecting to the night illuminance over the Korean peninsula. The experiment was executed to analyze the effects on the illuminance at separate sites(Gyeryong and Pilseung) considering the different light environments. The analysis was applied to illuminance measurement from the lightmeter, which was developed for the IYA(International Year of Astronomy) 2009, in order to observe the illuminance of areal networks. The weather observations, such as the cloud cover and visibility, were used to understand the quantitative influence of the illuminance to the selected sites. The results show that the illuminance measurements are significantly different from data of the operational illuminance prediction model which simply applies extinction effect for the illuminance. It shows that these differences are caused by the light environments and weather conditions for each site. Therefore, it can be confirmed that the night illuminance is the output of interaction with the characteristics of light for luminous sources.

• 한국도서관정보학회지
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• 제48권4호
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• pp.1-20
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• 2017

공공도서관의 가장 중요한 정체성은 지역주민의 지식정보에 대한 접근과 이용을 보장하는 공공재이다. 이를 정당화하려면 도서관은 최적의 조명환경을 구비해야 한다. 특히 시각을 통한 정보인지 비율이 80% 이상인 점을 감안하면 적정조도를 확보하는데 방점을 두어야 한다. 이에 본 연구는 대구지역 공공도서관을 대상으로 조도수준을 측정 분석하였다. 이를 바탕으로 공간별 조도수준을 제시하고, 적정 조도를 확보 유지하는 방안(국가표준 조도기준(KS A 3011)의 전면개정, 관할주체인 자치단체의 법규에 조명기준 및 공간별 조도범위 설정, 기존 조명기구의 LED로 교체, 조명관리에 대한 감독기능 강화, 운영주체인 도서관의 적정 조도 확보 유지를 위한 기본원칙 수립과 공간별 세부방안 마련, 이용자의 불만사항과 만족도 등에 대한 주기적 조사와 반영)을 제안하였다.

• KIEAE Journal
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• 제11권6호
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• pp.53-62
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• 2011

This study aimed at suggesting improvement of lighting environment of the coffee house using study place. To this end, a series of field investigation was conducted in four possible target coffee houses around university. The field measurement included measurement of general illuminance and tabletop illuminance, observing illumination condition, and status of artificial lighting. Also, on-site questionnaire survey was administrated to 80 users of field measurement targets about using characteristics of coffee house and user's subjective response on light environment. The results are summarized as follows: (1) According to questionnaire survey, most of users checked 'learning (study and reading)' in 'purpose of coffee house using', and 'slightly dark' was checked most in each subjective response (brightness on general space and on tabletop at daytime/night); (2) as results of measurements on general illuminance and on tabletop illuminance during daytime, only one coffee house was suitable for standard; (3) as results of measurements on illuminance during night, all target coffee houses were not met the standard; (4) as results of uniformity ratios, almost uniformities of general illuminance were not met the standard except one case. The common problems of lighting environment of coffee house were analyzed as lack of daylight illumination e.g. having low amount of sunshine from skylight, un-uniformity of insolation by floor plan and absence of window blind, and un-uniformity of artificial luminous intensity e.g. lack of the number or brightness of artificial lighting, using the indirect lighting, using only local lighting, and non-uniform arrangement of artificial lighting.