Combination of longitude and latitude, switching time, 70 thousand lights LED lights city

As winter approached, darkness grew earlier and earlier. Many people reflect the street lights in front of the switch time is not the same, sometimes early or sometimes late, I do not know what is the reason. Yesterday (3) morning, the reporter visited the City Urban Management Bureau a tube lamp control center, here 70 thousand LED lights on and off to realize computer automatic control, according to the Beijing based lighting time Yantai jingweidu automatic adjustment, such as special weather conditions, can also manually switch.

Light time is converted according to longitude and latitude

Yesterday (3) 9 morning, Mount Huangshan District of Zhifu is located near the small lamp control center, Zhifu district and Binhai Road, sea view, city street and other urban main road more than 70 thousand LED road lamps are here to control the opening and closing.

The big screen shows the day's switch lights on. "The turn off time this morning is 6:04, and the evening turn on time is 17:01." Light control center director Yuan Yongzhi told reporters. It is understood that 365 days a year, every day switching lights are not the same.

So what determines the daily switching time? Yuan Yongzhi told reporters, under normal circumstances, Beijing will determine the day of lighting time, the system will be based on latitude and longitude difference calculation, automatically determine the local lighting time. From these days of lighting time curve, the reporter saw that the daily lighting time will be 1-2 minutes earlier than the previous day, the corresponding turn off time is 1-2 minutes later than the previous day. "Light up at the latest should be the day of the summer solstice, the basic to 8 in the evening after the light, lighting at the earliest about the winter solstice, about 4:30 in the afternoon or so, a difference of nearly 4 hours."." The original never said, but if you encounter a rainy day when the lights there will be time to offset the need according to the specific weather conditions artificially adjusted in real time, as in the last few days of rainy weather, the dark is relatively early, raising pipe arrange timely adjust, according to early open street, ensure that the public convenience. In the event of special weather, extreme weather or major events, the staff will control and turn on and off the street lights at all times according to their actual needs.

The control center sees every street light

"At present, the city is a transformer control of a kilometer around the street light switch, so within a kilometer of 40 - 50 lights can only be lit at the same time at the same time." Original Yong said that in the future, Yantai will gradually introduce a single light control system, the current South Road has been installed in the 540 sets of pilot, from the control center can clearly see which lamp is not bright, in order to organize maintenance. In recent years, have gradually replaced the tube at the airport road, two road, Guanhai road and other main roads of the street, the original old old street lamp LED lamp energy saving and replaced all the good lighting effect, greatly improves the lighting at night. "Two streets", for example, is an important section of the city. The street lights were installed in 2005. The general street lamp has been changed for about 8 years, and the old street lights on the two roads have reached the service life. The street lamps with extended service have the disadvantages of small brightness and insufficient energy saving." The new LED light source has the advantages of high light efficiency, low energy consumption, long service life, good color rendering and so on. The 150 Watt LED street lamp is equivalent to the illumination effect of 500 Watt sodium lamp.

Reporters learned from the management department, the relevant departments will develop LED street lamp replacement program every year, from primary and secondary roads to streets and alleys, energy saving lamps will be popularized.

The cable is cut off and the system alarms automatically

The street often suffers from the "black hand", someone smashed, there was a car, have long used to quilt Le bad. Reporters learned that the most serious loss caused by cable theft, therefore, the street lights have been studying how to guard against cable in the past few years.

Yuan Yongzhi introduced that the principle is the power supply cable anti-theft lamp is formed at the weak loop, when the system is under normal working conditions, the cable is not stealing, normally there should be a loop current of 1 to 3a, the street lamp monitoring system automatically according to the ratio of current transformer ratio of amplification, can be detected by dozens of an even bigger current. Regardless of day or night, if the main cable is cut off, the circuit current will disappear. After remote detection, the cable monitoring system will prompt the cable theft at the first time.

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