Patent Application
20140239819
This invention relates to LED lighting field, more specifically to a centralized photosensitive LED streetlight control system.
Streetlights using LED as a light source have been used widely on many roads. To save energy, it is required that streetlights can become on and off automatically according to the brightness of outer environment. The conventional method for this is decentralized control method, that is, installing a photosensitive sensor on each LED streetlight which controls the power switch for LED streetlight according to the strong and weak light signals sensed by it and thus controls the on and off of the same. However, as LED streetlights are great in number, the above decentralized independent control method developed for each LED streetlight increases the complexity of the control system undoubtedly, moreover, to install a photosensitive sensor for each of a huge number of LED streetlights undoubtedly increases the manufacture cost of system substantially. At the same time, when the photosensitive sensors become abnormal, such phenomenon as some lights being on, some being off and lights being on during daytime and off in the evening may occur and the road management department is unable to master such abnormal cases and repair timely.
To resolve the above technical problem within the existing technology, the invention provides a centralized photosensitive LED streetlight control system to realize a relatively centralized control over a huge number of LED streetlights, reduce the complexity of control system and the manufacture cost of system.
To achieve the above purpose, the invention adopts the following technical solution.
A centralized photosensitive LED streetlight control system, including a control center, a number of LED streetlights and multiple field distribution boxes, with each of the field distribution boxes supplying power in a centralized way for multiple LED streetlights, also including multiple field controllers used in a complementing way with the field distribution boxes, with the field controller consisting of photosensitive sensor, processor, power switch control unit and communication module, the power switch control unit connecting to the power switch of field distribution box, the processor collecting and converting photosensitive sensor signal and outputting after analyzing and judging the control signal to the power switch control unit to control the power switch of field distribution box and thus control the centralized on and off of multiple LED streetlights supplied by the field distribution box; the communication module connecting with the control center network for the control center to monitor in real time the working states of field controller and power switch.
The control center makes a communication connection with each field controller through wire or wirelessly.
The field controller is installed on the field distribution box.
There can be one photosensitive sensor, one set of combined many photosensitive sensors or many photosensitive sensors used for standby may be included on each of the field controllers.
The field controller realizes the simultaneous control function of both clock and photosensitive sensor through software.
The field controller realizes the memory control function through software, namely, when all photosensitive sensors fail, it can effect control according to the on and off times of streetlight on the last day.
In the technical solution adopted in this invention, a field controller used in a complementing manner with field distribution box is added, which controls the switch power of field distribution box according to the photosensitive sensor signal to integrate the previous mode of independent photosensitive decentralized control of each streetlight into relatively centralized control in an area resulting in the need for photosensitive sensors being greatly reduced and the on and off of streetlights being unified. At the same time, in relation to single streetlight control mode, the control points in this invention are greatly reduced (which are equal in number to field distribution boxes used). As a result, the complexity of control system is lower, so is the manufacture cost. Also, it makes the streetlight control center be able to master the failure and operating conditions of photosensitive sensors and power switches.
The centralized photosensitive LED streetlight control system provided by this invention is described below through figures and embodiment example.
If one field distribution box 2 is to control multiple LED streetlights of two ways or more, it can be realized by configuring corresponding two or more power switches, each of which is put under control of field controller.
As shown in
Through software programming, the processor 5 in field controller 3 can also be added with a clock to control the on and off function of streetlight, with a comprehensive consideration to be given with the on an off function of photosensitive sensor 5 to make light turning on time more rational. A memory function can also be realized through software, namely, when all photosensitive sensors 5 fail, a control can be effected over streetlights according to the on and off times on the last day and no normal use of streetlights is influenced.
The above embodiment is only used to describe the technical solution for this invention and can not be used to limit the protection range of this invention. Any variations and transformations made under the guide of the technical solution thought of this invention will be within the protection range of this invention.
