A sensible lamp - how to do China lighting network

This is guangzhou baiyun district pearl waterways streetlights engineering drawings. In this article 10 meters wide double driveway, every 30 meters. Then have a 10 meter high of 150 w led street light, the hundreds of root cost 7300 yuan of street lamp,,

15 minutes behind open, issued by the mixture of blue and yellow phosphor white light. It is not easy to do a street light, too dark not sure, but it was too bright and flashes a blind driver's eyes. How to make the street lamps at the light? How was China's 26 million street lamp unified management? First of all, we need to clear the two basic concepts luminous flux and light intensity. Flux is the unit of lumen, represents the amount of light emitting light source, the solid Angle, divided by a given direction is the light intensity. Suppose a luminous flux 1000 lumens of light bulbs, and the average light in all directions, is this light bulb light intensity is

1000/4 PI = 79. 6 cd。 Used to measure the photometric data of the device is called distribution photometer, this is a patent. The core structure of the distribution photometer is two perpendicular axis of rotation. Perpendicular to the horizontal plane with photometric probe and cameras on both ends of the axis of rotation, by metering the source in the middle of the equipment, the vertical axis light rotate one circle can measure every Angle of photometric data. After the light source horizontal rotation, vertical axis measurement again, again transverse rotating, measurement, transverse rotate 360 ° to the light source, can be measured in various lighting the luminous intensity of different perspectives on the plane. Have a certain distance of light intensity data, we can draw the street lamp light distribution curve. Street lamp light intensity distribution of the usually use c - Gamma coordinate system, said the street is the center of the coordinate system, the street lamp do perpendicular to the road, the vertical translation can pull a flat c, let c

revolve around vertical plane, the c on the plane have different perspectives, including c = 0 ° and 180 ° c = c and direction parallel to the road. Said gamma ray and vertical Angle, in this way, each direction in space can be c and gamma to determine. To identify a c plane Angle, the plane each gamma Angle of light intensity data into this composed of gamma Angle value of light intensity in the chart, Conversion in flux is 1000 lm

) , all together, can get measured light distribution curve in the plane of the lamp in the c. Light distribution curve mean? This is our according to the upper left corner of the light distribution curve model renders the street lamps, each point on the green light on the light intensity corresponds to the light distribution curve corresponding to the y Angle of light intensity value. That we are now to think about a problem, reasonable street lamp light distribution curve should be what kind of? First of all, the curve should be smooth enough, don't let a person feel dimmer. Then, when you are far from street lamp, street lamp should be stronger light, so that you feel the brightness can be almost in every position. Finally, in order to prevent glare, more than 80 degrees Angle of gamma intensity should be limited, this shape has also been the industry known as bats vane light distribution. According to the different way of light distribution, we can put the street light is divided into three categories - — Cut light, half light, the light type. Such classification is to limit the driver sensitive Angle of light intensity, prevent glare. This a half light type lamp test report, the total luminous flux 4646 lumens, average light intensity 1321 CD, equivalent to 1300 candles. But in the 90 ° Angle of gamma light intensity on the top and no more than 30 CD, almost feel less than the light. And cut of the intensity of a light type for 80/90 ° gamma Angle limit will be lower. Released according to the ministry of city road lighting design standards, the road lighting of China is divided into three categories, roadway lighting, SEC area and pavement illumination. Motor vehicle in the tunnel lighting, more than 40 km/h arterial road and expressway must use sectional type street light light, speed and lower one branch can use half light lamps. And the type of street light will affect the height of the street lamp, spacing, different road also have different lamp configuration solution, time is limited, we can't one by one, interested viewers can reply on our public 'lights' about street light configuration rules. Today, China's most of the street lamp can be real-time monitoring, and control independently. This is updated at the end of 2017 the street light control system of national standard, the master station control system is a three layer structure, management and control layer. Control layer is installed in the single lamp controller inside the lamp power supply, measure the lamp current, voltage, temperature, and reported to management. Management is a street lamp installed in the centralized controller of the substation compartment, gathering a road dozens of root of street lamp parameters, operation, power consumption, such as data, through wireless Internet back to the main floor. The main status and data layer will integrate all the street lamps, the administrator can through the software to monitor the entire region of street lamp, and independent control every street lamp. With the improvement of the intelligent control system, street lamps in the future will be more and more intelligent. In 2015, dozens of cities in China began to pilot integrated charging, monitoring, alarm, and other functions of intelligent street lamp. You looking at the street lamp, street lamp is staring at you. YanZhiXiang

the distance photoelectric