I looked at the time. It was about 7:21. It wasn't 7:20.Mr. Jiang, a resident of jiuyan bridge, recently found a problem.
If you pay attention, you will find that the time of opening and closing of street lamps is different every day.The reporter understands from ChengGuanWei lighting management office of chengdu, chengdu is implemented city lighting "fine management, according to the need to open and close", and is now in the pilot "Internet of things" single lamp monitoring technology, the technology will be implemented on every street lamp monitoring data, and then used to form the big data management street light, the future can realize single lamp brightness adjustment as needed.
Precision lighting is achieved in this way
There are 24 collection points of natural illumination distributed within the ring expressway in the main urban area to collect the sunshine intensity in different areas.
When the intensity of light collected from these collection points reaches or falls below a set point at a certain moment, a message will be sent back to the control system, indicating that the street light can be turned off or on.
The standard value of on/closed circuit light is the ground illumination is less than/more than 30 lux, because the collection point is located on the roof, the illumination is higher than the ground, so the standard value set at the collection point is higher than 30 lux (lux: the unit of illumination).
It's very precise right now
Urban lighting has achieved "on-demand supply"
On the big screen of the lighting management office's urban lighting monitoring system, chengdu's map is dotted with 24 green dots."This is a natural light gathering point and is the basis for controlling when to turn on closed-circuit lights."According to a person in charge of the lighting department, the 24 points are evenly distributed as far as possible within the expressway around the main urban area, so as to collect sunshine intensity in different areas.When the intensity of light collected from these collection points reaches or falls below a set point at a certain moment, a message will be sent back to the control system, indicating that the street light can be turned off or on.
Lighting monitoring system
"According to the national regulations, the standard value of on-off/closed-circuit lights is the ground illumination is less than/more than 30 lux, because our collection points are located on the roof and other places, the illumination is higher than the ground, so the standard value set at the collection points will be higher than 30 lux.One lux is the equivalent of lighting a candle and is about one meter away from the white paper, the person said.
Because the time of sunrise and sunset is different in the morning and night, and the cloud cover in the sky is also different, the time of illumination reaching 30 lux in the morning is also different, which determines the opening and closing time of street lamps in chengdu is different every day.According to the monitoring system of the lighting management office, on November 1, solstice, 6, the time of turning off the street lights every morning is 7:12, 7:13, 7:27, 7:17, 7:21 and 7:24.
On November 1st, solstice 6th, the opening and closing time of street lamps in chengdu is different every day
Relying on this monitoring system, not only in the time to achieve accurate, on-demand lighting, also can be achieved in the region."In a summer thunderstorm, for example, when there are dark clouds in one part of the city and the sun is shining in another part of the city, the collection point in the dark area will remind us to turn on the street lights in time, while other areas do not have to."Said the person in charge.
More accurate in the future
Precise control of single light brightness can be achieved
It is no longer the most advanced technology of chengdu urban lighting to realize the precise management of street lamp opening and closing time and region according to the degree.The reporter understands, since march this year, illume management is in 9 li di area pilot "technology of Internet of things of single lamp monitor"."Basically, each street light is connected to the network and sends its own data back to the background, and we look at that data to see how each light is doing."
In the view of the above person in charge, the single lamp iot monitoring technology can achieve three goals.
The first is to precisely monitor each street lamp. You can see the voltage, current and other data of each street lamp without leaving the house to know whether the lamp is running normally.No need to go to the scene to check if the light is on.
Secondly, this technology can accumulate very useful big data after extensive application."For example, the current profile of each lamp changes over time and then reaches a certain value as it approaches its useful life.Based on these data, changes and thresholds, we can sum up the general situation of the same street lamp, and accurately predict and manage each lamp.
Third, it is in the application above, the future can be achieved to give each lamp instructions, adjust its brightness, to achieve accurate lighting."At 8 or 9 PM and 4 or 5 am, the amount of people's activity is different. In the future, we can link the traffic flow and other information, and realize the regional and time-sharing control of the brightness of a single street light, so that the city lighting is more intelligent and more energy-saving.
It is learned that Beijing, Shanghai, guangzhou and other first-tier cities in China are piloting the single-lamp Internet of things monitoring technology, but it has not been put into use on a large scale."This technology is the trend, and it will definitely be in the future, but the supporting communication technology and so on, still needs to be verified and proved to be reliable, after all, urban lighting is about urban security."Introduce according to afore-mentioned controller, at present chengdu pilot has entered final data to arrange a phase, at the same time this technology still sends the qualitative inspection orgnaization on the province to do a test, after the test result of two sides comes out, just can decide synthetical whether to popularize immediately use.