A method for controlling street lamps

Abstract

The invention provides a street lamp control method. The street lamp control method includes that a main station system sends control policies to a centralized controller through a network; the centralized controller receives and stores the control policies and sends different luminance control commands to single lamp controllers according to setting of luminance of each street lamp at different time points of every day; a first high-frequency band-stop filter is integrated on the incoming line side of each single lamp controller, and each single lamp controller receives the corresponding luminance control command, analyzes the luminance control command, modulates an obtained dimming signal and transmits the modulated dimming signal to the corresponding dimmer; a second high-frequency band-stop filter is integrated on the outgoing line side of each dimmer, and each dimmer receives the corresponding dimming signal, demodulates the dimming signal and drives output power of a street lamp power supply by outputting a 0-10V signal subjected to feedback regulation. The street lamp control method has the advantages that closed carrier communication is adopted between the single clamp controllers and the dimmers, so that transmission channels among lamp posts are independent from one another and are not interfered mutually, and different control of street lamp luminance is achieved.

Description

technical field [0001] The invention relates to the field of street lamp control for outdoor AC power supply lines, more specifically, to a street lamp control method based on the AC power supply line and with a controllable carrier communication range. Background technique [0002] Now, street lamp control usually adopts the following methods: 1. Use a time controller to control the switching lights of the entire street lamp; 2. Install a timing dimmer on the power supply of each lamp head to control the LED lights in different periods of time. Brightness, the total switch light time is still controlled by the time controller; 3. Using wireless communication, install a single lamp controller in each street lamp to monitor the operation of each street lamp and perform dimming control; 4. Carrier communication is adopted, and a single lamp controller is installed in each street lamp to monitor the operation of each street lamp and perform dimming control. [0003] The above ...

AI Technical Summary

Problems solved by technology

[0003] The above methods have their own characteristics, but there are also obvious problems: 1. The time controller method can only control the opening and closing of the entire line, and has no communication function or dimming function. It is a relatively rough street lamp. Control method; 2. Using lamp head power supply plus timing dimmer, the dimming method can only be solidified at the first installation, and there is no way to modify it. At the same time, there is no communication function, and intelligent control cannot be realized; 3. Wireless system, this method can be carried out Intelligent control of lamps and improvement of maintenance and management level. Since the centralized controller and single lamp controller in this way adopt wireless mode, there will be crosstalk problems in communication, and the antenna generally has to be installed on the lamp post near the lamp head. Construction It is extremely inconvenient to install, and lightning protection has also become a problem. At the same time, the wireless signal is greatly disturbed by the environment, and the signal interruption problem is prone to occur; 4. The traditional power carrier method is adopted. The main difference between this method and method 3 lies in the concentrator and single lamp. The power carrier mode is used between the controllers, which is relatively stable in communication. However, if the single-lamp controller is installed in the lamp head, it is inconvenient to maintain, and the temperature of the lamp head is high, which will cause the accuracy of the metering module inside the controller to drop or fail to work. , if it is installed in the maintenance hole, then two dimming wires have to be pulled to the light pole, which is very time-consuming and labor-intensive when deployed on site

[0004] Currently existing related technologies, such as the Chinese invention "A LED Street Lamp Control System Based on Power Carrier Communication Technology" disclosed on 2011-02-09 with the publication number 101969713A, include three components: a single lamp controller, a centralized controller and a management center. Layer network structure; the PWM output signal with programmable duty cycle is used to adjust the brightness of LED street lamps; the power line carrier technology is used for data transmission between the centralized controller and the single lamp controller, and the GPRS is used between the centralized controller and the management center Wireless network technology or Internet wired network technology for data transmission; the single-lamp controller is based on a single-chip microcomputer and is responsible for street lamp switch control and collection of street lamp operating parameters; the memory part stores the daily control strategy schedule and seasonal division time table, seasonal control strategy schedule and holiday control schedule; the centralized controller adopts embedded system design, uses power line carrier technology, and performs group control of street lamps in the area according to the preset lighting strategy and auxiliary light intensity control strategy. Group or single control; this solution solves the problem of intelligent management of street lamps and achieves energy-saving effects. At the same time, it uses power line carrier communication technology to save wiring costs. Process the external carrier signal and the carrier signal radiated by the street lamp power supply, so that during the transmission process, the carrier signal sent by the single lamp controller is easily interfered and causes errors, resulting in insufficient dimming of the street lamp; 2. This scheme adopts PWM output signal with programmable duty ratio to adjust the brightness of LED street lamps, while the technical scheme of the present invention adopts a 0-10V signal with better versatility, and adopts a 0-10V signal output method with feedback adjustment , which can make the DC signal output linearly, that is, the output value is very close to the target value, and can control the brightness of street lights more accurately

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