CN103269546A - An intelligent control system and method for LED street lamps - Google Patents

Abstract

The invention discloses an intelligent control system for LED street lamps, which comprises: a parameter sensor for collecting relevant parameters of the LED street lamp; an LED driver switch circuit for controlling the LED driver to turn on or off the power supply of the LED street lamp according to a processor command LED driver dimming circuit, which is used to control the LED driver to adjust the brightness of the LED street lamp according to the LED street lamp brightness value received from the processor when the LED street lamp power is turned on; LED driver, which is used to switch according to the LED driver The instructions of the circuit and the LED driver dimming circuit directly control the LED lamp board to perform corresponding actions; the processor is used to determine the switch state of the LED street lamp and adjust the brightness value according to the relevant parameters collected by the parameter sensor, and will determine The switch state and adjusted brightness value are sent to the LED driver switch circuit and the LED driver dimming circuit.

Description

An intelligent control system and method for LED street lamps

technical field

The invention relates to the control field of LED street lamps, in particular to an intelligent control system and method for LED street lamps.

Background technique

With the development of society, the energy problem has become one of the most concerned issues in the world, and the energy crisis has become the main crisis faced by all mankind. Daily production, life, and even seriously affect the development of my country's economy and the progress of social civilization. In my country's overall electricity consumption, lighting electricity occupies a large proportion. Urban street lights are an important part of modern urban construction. They serve traffic safety and people's production and life, beautify the appearance of the city, and play a pivotal role in creating a good investment environment. The quality of lighting that meets the visual function is an indispensable condition for ensuring traffic safety, social security, and people engaging in production and entertainment activities. With the rapid development of my country's economy, the number of lighting street lamps is increasing, and the proportion of its electricity consumption in the city's total electricity consumption is also increasing. According to statistics, my country consumes more than 100 billion yuan in electricity bills for street lighting every year, and its development speed is very alarming. Under the trend of urban lighting and beautification, the power consumption of urban landscape lighting is also devouring our power resources. However, the investment and construction of power generation companies requires a longer cycle, and rapid economic development requires more and more sufficient power supply and consumption, and there are many contradictions between power supply and demand. The power supply gap is difficult to alleviate in the short term, and equal emphasis on development and conservation has become an inevitable choice for economic construction. At this time, power saving in the lighting industry has become our inevitable choice.

At present, there are mainly two kinds of light sources used for street lighting: one is the traditional high-pressure sodium lamp, and the other is the energy-saving LED street lamp advocated by the state, which is used in a small number. LED (Light Emitting Diode, light-emitting diode), has many advantages such as small size, low power consumption, long life, high reliability, fast response speed, low driving voltage, etc., and is gradually replacing traditional lighting technologies such as incandescent lamps and fluorescent lamps. It is widely used in urban arterial roads, urban secondary arterial roads, industrial park roads, urban and rural roads and other fields.

Energy saving and high efficiency are synonymous with LED street lamps. The National Development and Reform Commission proposed that incandescent lamps should be phased out within 5 years and LED green lighting should be developed. In 2010, Nanjing tried to change all the street lights on a road into LED energy-saving lamps. However, after more than a year of trial, the effect was not as expected. In August 2010, the Nanjing Street Lamp Management Office replaced all high-pressure sodium lamps on both sides of Nanjing Jiefang Road with LED lamps on a large scale for the first time. On the road with a total length of 3 kilometers of Jiefang Road, 170 LED street lights were installed, but after more than a year of trial, the effect was not satisfactory. According to the preset service life, an LED street lamp can be used for at least 5 years, but in fact, in less than two years, the drivers of all LED street lamps along Jiefang Road have been repaired and replaced. The stability is poor, the price is expensive, and the later maintenance cost is high.

It can be seen that it is very important to adjust the working conditions of LED street lamps to improve their service life.

The wireless intelligent LED street lamp control system proposed in the prior art includes a street lamp management center system and a Zigbee wireless sensor control system; each LED street lamp in the Zigbee wireless sensor control system is equipped with a wireless street lamp intelligent controller, and the wireless street lamp intelligent controller The controller and the wireless street lamp intelligent controller are networked through the self-organizing network of Zigbee nodes. Each wireless street lamp intelligent controller has a unique network address on the network. The wireless street lamp intelligent controller automatically joins the network after power-on ;The street lamp management center system includes a monitoring PC and a server. The street lamp management center system is connected with the wireless street lamp intelligent controller network in the Zigbee wireless sensor control system through the public network; through the remote intelligent control of street lamps, the on-demand lighting of the road is realized , to save energy; at the same time, through the collection of street lamp information, the working status of street lamps can be monitored in real time, and faults of street lamps can be detected, located and analyzed.

However, in this implementation method, the wireless intelligent controller on each LED street lamp only realizes a single networking function, and uploads information to the management center through the network. It has no analysis and judgment function itself, and the control of street lamps is completely dependent on the network. When the network fails, the street lights cannot be controlled timely and accurately.

Another intelligent management and control device for high-power LED street lamps proposed in the prior art includes a control device box, and the control device box is respectively provided with a main input port for mains input and a main input port for connecting large The main output port of the power LED street lamp is characterized in that: the input port is connected with a drive module, and the output end of the drive module is connected with the main output end. The main input end of the drive module is connected with an intelligent switch control module. The control end of the intelligent switch control module is respectively connected with a time control module, an induction control module and a remote intelligent control module. Therefore, on the basis of the conventional switch control of street lamp power supply, intelligent switch control is added to minimize energy waste without affecting the use. At the same time, high-power LED street lights can be optimally illuminated according to the actual conditions of the road environment.

However, although this implementation scheme has various control modules, an intelligent switch control is added on the basis of the conventional switch control of the street lamp power supply, which reduces energy waste. But without considering the life curve formula of LED street lamps, it is possible to make LED street lamps work under high current and high heat for a long time, or to perform frequent on-off control, which will seriously reduce the service life of LEDs. Therefore this scheme can not take into account the purpose of prolonging the service life of the street lamp while reaching saving electric energy.

Although LEDs are energy-saving, like ordinary incandescent lamps, part of the energy is converted into light while the other part is converted into heat, especially LEDs are point-shaped light sources, and the heat generated by them is also concentrated in a very small area. The heat generated cannot be dissipated in time, and the junction temperature of the PE junction will rise, which will accelerate the aging of the chip and packaging resin, and may also cause the solder joints to melt, causing the chip to fail, which will directly affect the service life and luminous performance of the LED, especially High-power LEDs generate more heat and require higher heat dissipation technology.

Although many LED products indicate that the luminous life is more than 100,000 hours, it is not likely to have such a long life in current practical applications. The reason is that LEDs have the problem of light decay. considered unavailable. The main reasons for LED light decay are: a. Caused by high temperature. The light decay of LED street lights is related to its junction temperature. The so-called junction temperature is the temperature of the semiconductor PN junction. The higher the junction temperature, the earlier the light decay will appear, that is, the shorter the life. If it can be seen from the life curve formula of LED street lamps of a certain manufacturer, if the junction temperature is 105 degrees, the lifespan when the brightness drops to 70% is only more than 10,000 hours, and 20,000 hours at 95 degrees, and the junction temperature drops to 75 degrees. There are 50,000 hours, and it can be extended to 90,000 hours at 65 degrees. Therefore, the key to prolonging the life of street lamps is to reduce the junction temperature. b. The light reduction of the LED chip itself and the light attenuation caused by the phosphor. Most white LED street lights are obtained by irradiating yellow phosphors with blue LEDs. There are two main reasons for the light decay of high-power LED street lamps. One is the light decay of the blue LED light beads themselves. quick. Another is the light attenuation of the phosphor, and the attenuation of the phosphor at high temperature is also very serious. c. Light decay caused by insulating glue and fluorescent glue in the package. LED high temperature will cause the performance of insulating glue and fluorescent glue to decrease, thus affecting the luminous flux output by the lamp. d. The influence of LED brackets on light decay. LED brackets have copper brackets and iron brackets. The thermal conductivity of copper and iron is different. Copper has good thermal conductivity, which can cool down the lamp faster and has less impact on light decay.

From the above analysis, it can be seen that when the street lamp material is determined, the most important factor affecting the life of the LED street lamp is the operating temperature of the street lamp, and the operating temperature of the street lamp and the working time of the street lamp, the voltage applied to it and the flow through the street lamp The current is closely related.

Contents of the invention

Aiming at the problems that the service life of the existing LED street lamps is much lower than the designed service life, the present invention proposes an intelligent control system for LED street lamps and its control method, which monitors the working status of the street lamps from various aspects such as temperature, voltage, and current, and at the same time With data analysis and processing capabilities, the data can be processed through the pre-set algorithm in the processor to obtain the best working state of the street light.

The LED street lamp intelligent control system disclosed by the present invention includes:

A parameter sensor, which is used to collect relevant parameters of the LED street lamp;

The LED driver switch circuit is used to control the LED driver to turn on or turn off the power supply of the LED street lamp according to the processor command;

The LED driver dimming circuit is used to control the LED driver to adjust the brightness of the LED street lamp according to the brightness value of the LED street lamp received from the processor when the power supply of the LED street lamp is turned on;

The LED driver is used to directly control the LED light board to perform corresponding actions according to the instructions of the LED driver switching circuit and the LED driver dimming circuit;

A processor, which is used to determine the switch state and adjusted brightness value of the LED street lamp according to the relevant parameters collected by the parameter sensor, and send the determined switch state and adjusted brightness value to the LED driver switch circuit and the LED driver dimming circuit.

The intelligent control method of the LED street lamp disclosed by the present invention comprises:

Step 1. Divide the ambient brightness into different levels, and different levels of ambient brightness correspond to different LED street lamps to adjust the brightness value;

Step 2, collecting the ambient brightness of the location where the LED street lamp is located by the brightness sensor;

Step 3. Judging whether the collected ambient brightness is greater than the predetermined ambient brightness threshold, if so, turn off the LED street light, and return to step 2 to continue execution; if not, execute the next step;

Step 4. Determine the corresponding ambient brightness level according to the ambient brightness, and collect the temperature of the LED street lamp panel and the voltage and current of the LED street lamp by a temperature sensor, a voltage sensor and a current sensor;

Step 5. Judging whether the corresponding data collected by the above three sensors are all less than the preset corresponding threshold value, if they are all less than, adjusting the brightness of the LED street lamp according to the adjusted brightness value of the LED street lamp corresponding to the determined ambient brightness level;

Step 6. If the corresponding data collected by at least one sensor is greater than the preset corresponding threshold value, according to the determined current ambient brightness level, the temperature of the LED street lamp panel, the voltage and current of the LED street lamp, and the life of the LED street lamp The curve formula determines the adjusted brightness value of the LED street lamp, and adjusts the brightness of the LED street lamp according to the determined adjusted brightness value of the LED street lamp.

The system and method disclosed in the present invention enable the LED street lamp to automatically adjust the brightness of a single street lamp according to the temperature of the LED street lamp panel and the brightness of the surrounding environment under the guidance of the life curve formula designed by the manufacturer, so as to prolong the use of the LED street lamp under the premise of ensuring the lighting effect. purpose of life. At the same time, the LED street lamp intelligent control system is also equipped with a communication module. When only adjusting itself cannot achieve the purpose of reducing energy consumption and improving the service life, the status parameters of the street lamp can be uploaded to the external monitoring center, and it is requested to coordinate the working parameters of adjacent street lamps. , and complement each other to realize the optimization of street lights on the entire road section.

The LED street lamp intelligent control system disclosed by the present invention can realize the optimization of the service life, energy consumption and brightness of the street lamp under the condition of meeting the normal operation of the LED street lamp locally, and has a fast response speed. The controller also includes a communication module. According to a certain communication protocol, the working conditions and environmental conditions of each street lamp can be uploaded to the monitoring center to realize comprehensive monitoring of the entire system. Especially when the working conditions of LED street lamps are bad, or the status of LED street lamps is abnormal, and local adjustment cannot achieve the purpose of optimization, the monitoring center can make unified adjustments to coordinate and control the working parameters of its adjacent street lamps, reducing energy consumption. At the same time, it balances the life of street lamps in the entire road section, realizes the optimization of the entire system, reduces the workload of maintenance and replacement, and saves manpower and material resources.

Description of drawings

Fig. 1 is the structural block diagram of LED street lamp intelligent control system in the present invention;

Fig. 2 is a flow chart of the control method of the LED street lamp intelligent control system in the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

The invention discloses an intelligent control system for LED street lamps.

Fig. 1 shows a structural block diagram of an intelligent control system for LED street lamps in the present invention. As shown in Figure 1, the LED street lamp intelligent control system includes: MCU processor, communication module, voltage sensor, current sensor, brightness sensor, temperature sensor, LED driver switching circuit, LED driver dimming circuit and LED driver.

The core module of the LED street lamp intelligent control system is the MCU processor, which is directly connected to the voltage sensor, current sensor, brightness sensor and temperature sensor. The various parameters collected are provided to the MCU processor for analysis and calculation. Wherein, the voltage sensor measures the voltage applied to both ends of the LED street lamp, the current sensor is used to measure the current flowing through the LED street lamp, and the brightness sensor is used to measure the ambient brightness around the location of the street lamp, so as to determine whether to turn on the street lamp And which brightness value the street lamp needs to adjust to, the temperature sensor is directly installed on the LED lamp board to measure the real-time temperature of the LED lamp board of the street lamp to determine whether it is necessary to reduce the current flowing through the street lamp, thereby reducing heat generation.

The MCU processor is also connected to the LED driver switch circuit and the LED driver dimming circuit, and the processor outputs different control signals, which can control and adjust the LED driver for switching or dimming through the LED driver switch circuit and the LED driver dimming circuit. Different operations, and then control the opening and closing of the LED light board and brightness adjustment.

Both the LED driver switch circuit and the LED driver dimming circuit operate the LED driver, and the LED driver directly controls the LED light board to perform corresponding actions. The difference is that the LED driver switch circuit controls the LED driver to turn on or off the power supply of the LED light board. The LED driver dimming circuit controls the LED driver to adjust the brightness of the LED light board when the power of the LED light board is turned on, and it has no effect when the power of the LED street light board is turned off.

The MCU processor first determines whether the current ambient brightness exceeds the preset ambient brightness threshold for turning on the lights according to the ambient brightness collected by the brightness sensor, and if so, controls the LED driver to turn off the LED through the LED driver switch circuit. If the power supply of the street lamp does not exceed, then determine the current ambient brightness level; wherein the ambient brightness is divided into different levels, and each ambient brightness level corresponds to an adjustment brightness value of the LED street lamp; the MCU processor determines the current After the ambient brightness level, control the temperature sensor, voltage sensor and current sensor to collect corresponding data, and judge whether the corresponding data collected by the above three sensors exceeds the corresponding preset threshold, if at least one of the corresponding data exceeds the preset threshold The corresponding threshold value set is then optimized and calculated using an optimization algorithm, that is, optimized according to the determined current ambient brightness level, the temperature of the LED street lamp panel, the voltage and current of the LED street lamp, and the life curve formula of the LED street lamp. On the premise of ensuring the maximum service life of the LED street lamp, the best brightness adjustment is obtained, and the LED driver is controlled by the LED driver dimming circuit to adjust the brightness of the LED street lamp panel. If the corresponding data collected by the three sensors are all less than the preset corresponding threshold, the LED driver is directly controlled by the LED driver dimming circuit to adjust the brightness of the LED street lamp panel to the LED corresponding to the current ambient brightness level. Street lights adjust brightness.

The communication module included in the control system can, according to a certain communication protocol, collect the working conditions and environmental conditions of each street lamp, that is, the street lamp collected by the voltage sensor, current sensor, brightness sensor and temperature sensor. Various parameters during work and the unique network number of the street lamp are uploaded to the external monitoring center to realize comprehensive monitoring of the entire system.

The invention also discloses a control method of the LED street lamp intelligent control system.

Fig. 2 shows a flow chart of the control method of the LED street lamp intelligent control system disclosed in the present invention. As shown in Figure 2, in this control method, the brightness threshold that does not need to be turned on is set, and the ambient brightness that needs to be turned on is graded. Different ambient brightness levels correspond to an optimal adjustment brightness value of the LED street lamp; and then Set the voltage and current thresholds according to the rated operating parameters of the LED street lamp, and set the temperature threshold according to the life curve formula of the LED street lamp provided by the manufacturer (the life curve formulas of different models of LED street lamps from different manufacturers are different). After the parameters and thresholds are set, the data is collected cyclically and judged, and the LED street lights are controlled to take corresponding actions according to the judgment results. The specific process is as follows:

Step 1. Divide the ambient brightness into N levels. For different LED street lights, N is equal to the number of brightness levels that can be adjusted by the LED street light;

Step 2. Collect the ambient brightness parameters of the location where the LED street lamp is located by the brightness sensor;

Step 3. Determine whether the ambient brightness is greater than the ambient brightness threshold according to the collected ambient brightness parameters, if so, turn off the street light, and return to step 2 to continue execution; if not, execute the next step;

Step 4. Determine the corresponding ambient brightness level according to the ambient brightness parameter, and collect the temperature of the LED street lamp panel and the voltage and current of the LED street lamp by a temperature sensor, a voltage sensor and a current sensor;

Step 5. Determine whether the corresponding data collected by the above three sensors are all less than the preset threshold value. If they are all less than the preset threshold, it means that the street lamp is in good working condition, and directly adjust the brightness value of the LED street lamp corresponding to the determined ambient brightness level. Brightness of LED street lights;

Step 6. If the corresponding data collected by at least one sensor is greater than the threshold value, it means that if the LED street lamp works at the adjusted brightness value corresponding to the ambient brightness level, the service life will be shortened. At this time, it is necessary to enter the optimization method to obtain the best adjusted brightness value, and adjust the brightness of the LED street lamp according to the determined adjusted brightness value of the LED street lamp.

The optimization method (also known as the operation research method) has been formed in recent decades. It mainly uses mathematical methods to study the optimization methods and programs of various systems, and provides decision-makers with a basis for scientific decision-making. The purpose of the optimization method is to obtain an optimal plan for the rational use of manpower, material and financial resources for the system under study, to exert and improve the efficiency and benefits of the system, and finally to achieve the optimal goal of the system. In a mathematical sense, the optimization method is a method of seeking extreme values, that is, under a set of constraints that are equal or inequalities, the objective function of the system reaches the extreme value, that is, the maximum or minimum value. In an economic sense, it is to maximize the economic effect (such as output value, profit) under certain conditions of human, material and financial resources, or to maximize the input of human, material and financial resources under the completion of specified production or economic tasks. and other resources are minimal.

The solution to an optimization problem is generally called the optimal solution. When solving practical problems, the situation is complicated, and the ideal optimal solution is not easy to obtain, or it needs to pay a large price, so the solution is only required to meet the conditions within a certain limit, and it is not necessary to overemphasize the optimal solution. In the early 1950s, in the early development of operations research, the concept of sub-optimization and its corresponding sub-optimal solution were proposed. Because the establishment of the optimization model itself is only an approximation, some factors in practical problems, especially some non-quantitative factors, are difficult to be considered in one model; on the other hand, there is still a lack of methods for solving more complex models. Useful ways.

In the present invention, when the data collected by the temperature sensor, voltage sensor or current sensor is greater than the threshold value, instead of simply judging the adjusted brightness value of the LED street lamp, it performs an optimization operation according to the optimization method, and then obtains the situation that the life of the street lamp is not shortened as much as possible Lower the brightness of the street lights that should work. The optimization method is realized according to the mathematical model established as follows, namely:

The data collected by the voltage, current and temperature sensors are denoted as U, I and C respectively, the adjusted brightness of the street lamp is denoted as R, the life curve formula of the street lamp is provided by the manufacturer of the street lamp, denoted as S=f(c), the current and The relationship of the brightness of street lights is I=w(R); r is the current ambient brightness level determined according to the ambient brightness parameters.

Under normal circumstances, the voltage U=220V at both ends of the LED street lamp, and the fluctuation range is determined by the voltage stability of the entire grid, which is temporarily set at 20%. Therefore, the voltage constraint is U1<U<U2, where U1=176V, U2=264V ;The current changes in the range of I1<I<I2 according to the power of the power supply and the brightness of the street lamp, where I1 is the minimum current for the normal operation of the LED street lamp, and the brightness of the street lamp is the minimum at this time; I2 is the maximum current for the normal operation of the LED street lamp, here The brightness is also at its maximum. For LED street lamps with different powers, I1 and I2 are different, and the specific values are provided by the street lamp manufacturer.

When the temperature of the LED street lamp panel is higher than 65°C, the street lamp is very easy to be damaged, so the temperature constraint condition C≤65.

At this time, the problem is transformed into the optimization problem of finding the maximum value of life S=f(c) under the constraints of voltage, current, temperature and brightness level r, and the adjusted brightness value R at the maximum value of life S is Optimized adjusted brightness value.

Use matlab and other software for digital programming to obtain the optimal solution of the optimization problem, that is, the optimal adjustment brightness value of the LED street lamp, and then command the LED driver to control the LED lamp board to perform corresponding actions through the LED driver dimming circuit. According to the difference of the life curve formula S=f(c), the established mathematical models are also different, and the corresponding optimization problem solving methods are also different, usually in the function approximation method, pattern search method, least square method and other methods. choose.

The control system also includes a communication module. According to a certain communication protocol, the working conditions and environmental conditions of each street lamp can be uploaded to the monitoring center to realize the comprehensive monitoring of the entire system. Especially when the working conditions of LED street lamps are bad, or the status of LED street lamps is abnormal, and local adjustment cannot achieve the purpose of optimization, the monitoring center can make unified adjustments to coordinate and control the working parameters of its adjacent street lamps, reducing energy consumption. At the same time, it can balance the life of street lamps in the entire road section, realize the optimal control of street lights in the entire road section, reduce the workload of maintenance and replacement, and save manpower and material resources.

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention, and are not intended to limit the present invention. Within the spirit and principles of the present invention, any modifications, equivalent replacements, improvements, etc., shall be included in the protection scope of the present invention.

Claims (11)

1. An intelligent control system for LED street lamps, comprising: A parameter sensor, which is used to collect relevant parameters of the LED street lamp; The LED driver switch circuit is used to control the LED driver to turn on or turn off the power supply of the LED street lamp according to the processor command; The LED driver dimming circuit is used to control the LED driver to adjust the brightness of the LED street lamp according to the brightness value of the LED street lamp received from the processor when the power supply of the LED street lamp is turned on; The LED driver is used to directly control the LED light board to perform corresponding actions according to the instructions of the LED driver switching circuit and the LED driver dimming circuit; A processor, which is used to determine the switch state and adjusted brightness value of the LED street lamp according to the relevant parameters collected by the parameter sensor, and send the determined switch state and adjusted brightness value to the LED driver switch circuit and the LED driver dimming circuit. 2. The system according to claim 1, wherein the parameter sensor comprises: a voltage sensor, a current sensor, a brightness sensor and a temperature sensor. 3. The system according to claim 1, wherein the parameter sensor comprises a brightness sensor, and the processor determines the adjusted brightness value of the LED street lamp according to the ambient brightness collected by the brightness sensor. 4. The system according to claim 3, wherein the intelligent control system includes an LED driver switch circuit, which is used to command the LED driver to control the switch of the LED street lamp; the processor determines that the brightness sensor collects After the detected ambient brightness exceeds a predetermined threshold, the LED driver is controlled by the LED driver switch circuit to turn on or turn off the power supply of the LED street lamp. 5. The system according to claim 3, wherein the ambient brightness of the LED street lamp needs to be turned on into different levels, and the ambient brightness of different levels corresponds to different adjustment brightness values of the LED street lamp; the processor determines according to the ambient brightness the current ambient brightness level, and determine the adjusted brightness value of the LED street lamp according to the current ambient brightness level. 6. The system according to claim 3, wherein the intelligent control system further comprises a temperature sensor, a voltage sensor and a current sensor; after the processor determines that the ambient brightness collected by the brightness sensor does not exceed a predetermined threshold , determining the adjusted brightness value of the LED street lamp according to the ambient brightness collected by the brightness sensor, the lamp panel temperature of the LED street lamp collected by the temperature sensor, and the voltage and current of the LED street lamp collected by the voltage sensor and the current sensor. 7. The system according to claim 6, wherein the ambient brightness is divided into different levels, and the ambient brightness of different levels corresponds to different adjustment brightness values of LED street lamps; the temperature and voltage of the LED street lamp panel collected by the temperature sensor When the voltage and current of the LED street lamp collected by the sensor and the current sensor do not exceed the corresponding predetermined threshold, the processor determines the current ambient brightness level according to the ambient brightness collected by the brightness sensor, and according to the determined current ambient brightness The level determines the adjusted brightness value of the LED street light. 8. The system according to claim 6, wherein the ambient brightness is divided into different levels, and the ambient brightness of different levels corresponds to different adjustment brightness values of LED street lamps; the temperature and voltage of the LED street lamp panel collected by the temperature sensor When at least one of the voltage and current of the LED street lamp collected by the sensor and the current sensor exceeds the corresponding predetermined threshold, the processor determines the current ambient brightness level according to the ambient brightness collected by the brightness sensor, and according to the determined current The brightness level of the environment, the temperature of the lamp panel of the LED street lamp, the voltage and current of the LED street lamp, and the life curve formula of the LED street lamp determine the adjusted brightness value of the LED street lamp. 9. The system according to claim 8, characterized in that, according to the determined current ambient brightness level, the lamp panel temperature of the LED street lamp, the voltage and current of the LED street lamp, and the life curve formula of the LED street lamp, the The adjustment brightness value of the LED street lamp is specifically to obtain the best ambient brightness level through an optimization method under the condition of ensuring the maximum service life of the LED street lamp, and determine the LED street lamp according to the determined optimal ambient brightness level. to adjust the brightness value. 10. The system according to claim 1, wherein the intelligent control system further comprises a communication module, which is used for information interaction between the intelligent control system and an external monitoring center. 11. An intelligent control method for LED street lamps, comprising: Step 1. Divide the ambient brightness into different levels, and different levels of ambient brightness correspond to different LED street lamps to adjust the brightness value; Step 2, collecting the ambient brightness of the location where the LED street lamp is located by the brightness sensor; Step 3. Judging whether the collected ambient brightness is greater than the predetermined ambient brightness threshold, if so, turn off the LED street light, and return to step 2 to continue execution; if not, execute the next step; Step 4. Determine the corresponding ambient brightness level according to the ambient brightness, and collect the temperature of the LED street lamp panel and the voltage and current of the LED street lamp by a temperature sensor, a voltage sensor and a current sensor; Step 5. Judging whether the corresponding data collected by the above three sensors are all less than the preset corresponding threshold value, if they are all less than, adjusting the brightness of the LED street lamp according to the adjusted brightness value of the LED street lamp corresponding to the determined ambient brightness level; Step 6. If the corresponding data collected by at least one sensor is greater than the preset corresponding threshold value, according to the determined current ambient brightness level, the temperature of the LED street lamp panel, the voltage and current of the LED street lamp, and the life of the LED street lamp The curve formula determines the adjusted brightness value of the LED street lamp, and adjusts the brightness of the LED street lamp according to the determined adjusted brightness value of the LED street lamp.

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