404,250 research outputs found

    Smart street lighting system

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    A c, light pole, lamppost, street lamp, light standard or lamp standard is a raised source of light on the edge of a road or path. Street lighting provides a number of important benefits. It can be used to promote security in urban areas and to increase the quality of life by artificially extending the hours in which it is light so that activity can take place. Street lighting also improves safety for drivers, riders, and pedestrians..

    Application of Fuzzy Logic to Control Room Illumination Based Microcontroller

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    ABSTRACT An illumination room is needed by humans to recognize objects visually. Lighting has an influence on the function of a room. Therefore we need the lights as the main lighting source that can support the function room. Generally used for indoor lighting arrangements on-off principle. Lighting settings with on-off principle is based only on the condition of the light dark room, regardless of the contribution from the outside as the sun. This often resulted in inconvenience and inefficiency use of electrical energy. Therefore, adjustment is necessary lighting (illumination) generated light. Control principle used is fuzzy. Fuzzy inference system used in this room is the lighting controllers Sugeno method. The composition rules using the AND operator, while for the COG method is used defuzzyfication (Center of Gravity). As a main controller in the system using a microcontroller with input from the light sensor (LDR). The output of the controller then displayed on the LCD as a viewer and as an input the voltage regulator circuit. This system works in the room (in door) using the model of a house with three rooms as a model. From the simulation results with fuzzy control, if the setpoint of rooms 200 lux and state rooms are light at 80 lux, the light will produce light at 125 lux, if the setpoint 300 lux and 50 lux room condition, then lighting the lamp is 250 lux, and if the setpoint 150 lux and 30 lux room condition, then lighting the lamp is 125 lux. Keyword: Fuzzy controller, Illumination, Microcontrolle

    Feasibility Study of Solar Power Generation System for Public Street Lighting

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    One of the uses of electricity that is widely used by society today is as a source of lighting. The increasing level of community mobility makes all activities require lighting. One part that is important and requires lighting is a highway or public road. PJU is a lighting lamp that is public (for the common good) and is usually installed on roads and certain places such as parks and other public places. PJU (street lighting) or road lighting is a light source that is installed as street lighting at night. Public street lighting using solar power is a cheap and economical alternative to be used as a source of lighting electricity because it uses a new and unlimited renewable energy source that comes from nature, namely solar energy. This study aims to determine the feasibility of solar street lighting in the future as a substitute for conventional public street lighting in the future by looking at the Net present cost, and Break even point assisted by HOMER software version 3.10.3. And the results obtained from the calculation of the Net present cost of conventional street lighting costs less, which is only Rp. 30,245,473 and the Net present cost of solar street lighting costs an initial investment of Rp. 128,341,312 and the BEP (Break even point) graph that has not been found to break even.

    Lighting and display screens: Models for predicting luminance limits and disturbance

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    An investigation of the level of disturbance caused by reflections from a variety of display screens, including interactive whiteboards, has been carried out using three test methods: Luminance adjustment, category rating and reading. The results from the luminance adjustment test and the category rating test were consistent, both showing similar significant effects of lighting-display parameters on the disturbance caused by screen reflections. In contrast, the objective measure of task performance in the reading test was barely responsive to reflections on the screens. Two models have been developed, one to predict the luminaire luminance at which 95% of observers were not disturbed by the reflections and the other to predict the rating of disturbance caused by reflections from the screens. Both models are based on lighting-display parameters including the size and luminance of the reflected light source and the specular reflectance, the effect of haze reflection and the background luminance of the display screen. These models can be used generally, to guide lighting recommendations and, specifically, to identify suitable luminaires to be used with given set of display screens or suitable display screens to be used with a given lighting installation

    Infrared viewing permits human iris response studies

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    Infrared image converter tube and a filtered light source monitor and measure the eye of a subject during experimental task-work operations to obtain a more natural measurement of unimpeded iris response. The device permits observation in the near infrared region, with little stimulation to the eye except by normal ambient lighting

    Analysis of harmonic current interaction in an industial plant

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    An analysis of current transients caused by the operation of a nearby device in an industrial plant is presented in the paper. The source of current transients in the factory lighting system was traced to the operation of the nearby six-pulse AC/DC converter. To determine the nature of the interaction, a measurement was done with a storage oscilloscope. Also, laboratory experiments on one lamp were conducted. It was possible to exclude the presence of a parallel resonance on this site. It was concluded that transients are caused by voltage notches in certain working regimes of the six-pulse converter. Possible solutions to the problem are separating the supplies of the converter and the lighting installation, filtering, or adding additional line reactance

    Use of supplementary lighting top screens and effects on greenhouse climate and return on investment

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    Discomfort caused by light pollution from greenhouses that apply supplementary lighting is an issue in Dutch society nowadays. At this moment Dutch legislation requires an opaque screen that reduces light transmission of the greenhouse wall by 95%. In 2008 also the light transmission of the greenhouse roof must be reduced equally and supplementary light will be limited to 15,000lx(180¿mol/m2/s), unless light emission is totally prevented. The objective of this research was to calculate the economic consequences of installing reflecting, light emission reducing or blocking screens by considering crop yield and costs. A mathematical correction equation was developed to approach the light gain for the crop as a result of internal reflection. Greenhouse climate and tomato crop growth were simulated for a reference greenhouse with supplementary lighting and without an emission blocking screen and for a low-light-emission greenhouse with a blocking screen. The supplementary lighting level was set at 180¿mol/m2/s. Results show that the greenhouse climate below the screen remained manageable, but that the desired DIF of 2°C was affected. The light gain was on average about 3% and resulted in production increase. A small net yearly profit resulted based on direct and indirect effects of the screen. In conclusion, the simulation suggested that stopping light emission at the source with help of reflective opaque screens is economically feasible if screen operation is included in planning the lighting scheme

    Physically-Based Editing of Indoor Scene Lighting from a Single Image

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    We present a method to edit complex indoor lighting from a single image with its predicted depth and light source segmentation masks. This is an extremely challenging problem that requires modeling complex light transport, and disentangling HDR lighting from material and geometry with only a partial LDR observation of the scene. We tackle this problem using two novel components: 1) a holistic scene reconstruction method that estimates scene reflectance and parametric 3D lighting, and 2) a neural rendering framework that re-renders the scene from our predictions. We use physically-based indoor light representations that allow for intuitive editing, and infer both visible and invisible light sources. Our neural rendering framework combines physically-based direct illumination and shadow rendering with deep networks to approximate global illumination. It can capture challenging lighting effects, such as soft shadows, directional lighting, specular materials, and interreflections. Previous single image inverse rendering methods usually entangle scene lighting and geometry and only support applications like object insertion. Instead, by combining parametric 3D lighting estimation with neural scene rendering, we demonstrate the first automatic method to achieve full scene relighting, including light source insertion, removal, and replacement, from a single image. All source code and data will be publicly released

    Pengaruh Pajak Daerah Terhadap Pendapatan Asli Daerah (Studi Kasus Pada Dinas Pendapatan Kota Batu Tahun 2010 - 2012)

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    A development of a region could be observed from financial development and independency of that particular region in running local government. One of the factors which support it is the availability of an adequate financial, such as Own-Source Revenue. Own-Source Revenue is obtained from several sources such as local tax. Local tax gives an approximately big contribution to Own-Source Revenue. This study aims at identifying the simultaneous influence of the local tax including Hotel Tax, Restaurant Tax, Entertainment Tax, Advertisement Tax, Street Lighting Tax, Parking Tax towards Own-Source Revenue. Moreover, this study is intended to find local tax which dominantly influences Own-Source Revenue.This research is an explanatory research and conducted in the Revenue Office in Batu. Secondary data is employing documentation technique with multiple linear regression analysis.The population and sampling data used are 36 months as full sample. The results of the study show that local tax including Hotel Tax, Restaurant Tax, Entertainment Tax, Advertisement Tax, Street Lighting Tax, parking Tax, simultaneously influences Own-Source Revenue. Partially, Restaurant Tax, Entertainment Tax, Advertisement Tax, and Street Lighting Tax have a significant impact towards Own-Source Revenue. The tax which has dominant influence towards Own-Source Revenue is Street Lighting Tax
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