The air switch Q, the primary side of the variable reactor (LB) and the illumination system constitute the main circuit, and the microprocessor, the illumination detection system, the power electronics and the secondary side of the variable reactor (LB) constitute a control system. The working process of the system is: according to objective conditions such as changes in external illumination, voltage changes in the power supply grid, and working hours, an intelligent control algorithm is used to output control signals to control and change the triggering condition of the power electronic device, that is, to change the low voltage winding of the variable reactor. The voltage, thus changing the voltage on the high voltage winding, to achieve the effect of changing the supply voltage of the lighting system, in order to achieve lighting system switching, dimming automation. The control system automatically controls the opening of the street light according to the intensity of the outside light. When the street lamp is on, its illumination intensity is different according to the time period and the grid voltage is different, and the "soft" adjustment is realized by intelligent algorithm control. The main function of the switch circuit is to detect the light outside. When the light is dark to a certain extent, the lighting power is turned on and the street light is turned on; when the light is bright, the street light is not turned on. The system hardware circuit is mainly displayed by a microprocessor, a signal conditioning circuit, an A/D conversion part, a D/A conversion part, a drive circuit, a keyboard and an LCD. The signal conditioning circuit converts external voltage, current, ambient light and other signals into a signal range acceptable to the A/D device, and the converted digital signal is sent to the microprocessor via the optical isolation circuit. The result of the micro processing is outputted by the A/D converter as an input signal of the power component portion. The D display can display each data in separate screens. Set or modify system time, stable voltage value, latitude and longitude, time control parameters, etc. through the keyboard. In addition, when the system detects a three-phase voltage imbalance, overcurrent or short-circuit fault, the corresponding relay will be driven to take timely protection measures. The system intelligent control process is based on empirical data to pre-set illuminance tables in different geographical locations, different seasons and different time periods, combined with modern lighting technical parameter indicators, to achieve automatic adjustment of illumination at different times, to automatically control lighting equipment, and to achieve centralized and unified management. With monitoring features. The control system's control over the power supply is mainly reflected in the following two aspects: When the outside light dims to a certain extent, the lighting system starts. With time, the grid voltage changes, causing large voltage fluctuations. The PC collects the voltage signal of the lighting system, and sends the fuzzy controller through the operation process to obtain the output control amount. As the trigger signal of the thyristor, the conduction angle is changed. Thereby achieving "soft" regulation control of the load system voltage. The fuzzy controller uses a nine-point controller. The nine-point controller has two input parameters: deviation (E) and deviation change rate (EC), and one output control quantity is U. Each input parameter has three states, so nine operating conditions are output. For each operating condition, the parameters of the nine-point controller are determined to obtain a control rule table. In the lighting power system, the input of the controller is E and EC, and the output control amount is U. The expression is: E(n)=V-V(n)(2-1)EC(n)=E(n)-E(n-1)(2-2) According to experience, an intelligent controller control rule table for the lighting power system is established. The deviation and deviation change rates are divided into three levels. For the nine working conditions composed of deviation and deviation change rate, there are five corresponding control decisions: negative NB=-2, negative small NS=-1, zero Z= 0, positive PS = 1, positive PB = 2, indicating the magnitude of the control amount and the control direction (increasing or decreasing). By measuring the "time vehicle (person)" statistical law of urban road vehicles and pedestrians, the corresponding illuminance adjustment rate is obtained, and the microprocessor control program is designed accordingly, according to the illuminance adjustment rate, starting from a certain moment, smoothly The street lamp input voltage is dynamically adjusted to achieve the best match between the street lamp input electric power and the actual illuminance requirement. The illuminance adjustment software is implemented in segments. Starting from a certain moment, the process of converting the illumination power supply voltage value from V to V (assuming V>V) is: divide V to V into three values ​​V, V, V, ie V>V>V>V >V, divided into 4 segments as the given value, the first time is given as V, the second time is given as V, and the third and fourth are sequentially V and V, so that the street lamp input voltage is smoothly Make dynamic adjustments. Experiments show that the new intelligent lighting power supply has obvious energy-saving effect, and can also reduce the heat of the lamps, greatly extend the life of the lighting fixtures, and has obvious economic and social benefits. Fiber Splice On Connector now available in SC, LC, or FC variants, which is catering for 250um to 900um, and 2.0mm, 3.0mm diameter single mode and multimode fiber types, including Multi-mode 62.5/125um and Multi-mode 50/125um. The single-mode versions of fiber splice on connector are available with PC or APC ferrules. 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September 05, 2019