CN102595716B - Solar light-emitting diode (LED) street lamp monitoring system - Google Patents

Abstract

The invention discloses a solar LED street lamp monitoring system, which includes a solar cell assembly, a system controller, a light sensor, a power supply, an LED street lamp, an infrared light sensing device and a remote data transmission module, a solar cell assembly, a light sensor and an infrared light The output of the induction device is connected to the system controller respectively, and each LED street lamp is connected to the output of the system controller respectively; the power supply includes the mains power supply and the storage battery; the remote data transmission module includes the power carrier module or GPRS module, and the system controller passes the power The carrier module is connected with the commercial power line, and the system controller is connected with the GPRS wireless network through the GPRS module. The controller of the invention protects the accumulator and prolongs the service life of the accumulator; the street lamp is turned off when no one is there, and the infrared light sensing device senses pedestrians or vehicles to turn on the street lamp, which has the characteristics of low power consumption of the accumulator and high energy utilization rate.

Description

Solar LED Street Light Monitoring System

technical field

The invention relates to a solar LED street lamp monitoring system.

Background technique

In the 21st century, the three main problems faced by human beings are energy, environment and economy. Energy and economic problems have increasingly become the bottleneck restricting social and economic development. The fossil energy currently used by human beings is becoming increasingly exhausted, and environmental pollution is becoming more and more serious. Under the dual pressure of energy substitution and the gradual deterioration of the human ecological environment, the development of new energy has become the focus of attention of all countries in the world, and the task of developing clean energy that is renewable and does not pollute the environment is imminent.

As an inexhaustible and non-polluting clean energy, solar energy has been recognized as the most effective energy source to solve the energy crisis in the future; LED lights have the advantages of long life, high efficiency, energy saving, and environmental protection. Therefore, the solar LED street lamp developed by combining solar energy and LED street lamp organically is the trend of street lamp development today. At present, most of the street lights on the market are high-pressure sodium lamps. Some of the street lights in the park are LED street lights, and some are solar LED street lights. However, there is no effective management and monitoring of the battery and the display of the LED light. Storage or discharge; at night, the street lights cannot remotely sense whether there are people or cars approaching, and they are always on, wasting battery power. Generally speaking, the energy utilization rate of traditional solar LED street lights is not high, and the reliability is not strong.

Contents of the invention

The purpose of the present invention is to solve the deficiencies of the existing solar LED street lamps, and provide a monitoring system for solar LED street lamps, which overcomes the fact that the display of traditional solar LED street lamps cannot be effectively managed and monitored, and it is impossible to control whether the battery is storing electricity or not according to the intensity of sunlight. Discharge; at night, street lamps cannot remotely sense whether there are people or cars approaching, and are always on, which wastes battery power. When the battery power is low, it cannot automatically switch to the mains power supply, which has disadvantages such as low energy utilization and poor reliability.

The object of the present invention is achieved through the following technical solutions: a solar LED street lamp monitoring system, which includes a solar cell assembly, a system controller, a light sensor, a power supply, at least one LED street lamp, an infrared light sensing device and a remote data transmission module, The outputs of the solar cell assembly, the light sensor and the infrared photosensitive device are respectively connected with the system controller, and each LED street lamp is respectively connected with the output of the system controller; the power supply includes a mains power supply and a storage battery, and the mains power supply and the output of the storage battery are respectively connected with the power terminal of the system controller, and a charging output of the system controller is also connected with the storage battery; the remote data transmission module includes a power carrier module or a GPRS module, and the system controller communicates with the city through the power carrier module The system controller is connected with the GPRS wireless network through the GPRS module. the

The invention also includes a clock circuit, the output of which is connected to the system controller.

The system controller of the present invention comprises signal processing circuit, A/D sampling circuit, main circuit and microprocessor, and signal processing circuit, A/D sampling circuit and main circuit are connected with microprocessor respectively, and main circuit is formed by bidirectional DC - Composed of a DC converter and a charge-discharge switching circuit.

The beneficial effects of the present invention are:

(1) The light sensor senses the illuminance, and when the illuminance decreases to about 10lux at night, it controls the battery to discharge the LED street lamp, and the battery provides power supply for the LED street lamp; the system controller monitors the brightness according to the different requirements of people in different time periods at night. The input power of solar LED street lamps, according to the amount of energy absorbed by the solar cells during the day, monitors the output power of solar LED street lamps, saving energy and reducing consumption and improving the reliability of the monitoring system;

(2) The system controller controls the charging and discharging process of the battery to protect the battery. The charging and discharging of the battery adopts the maximum power point tracking algorithm to improve the photoelectric conversion efficiency of the solar panel; the three-stage pulse width modulation with MPPT is adopted The monitoring method monitors the charging/discharging algorithm of the remaining charge capacity SOC of the battery, which effectively avoids overcharging and overdischarging of the battery and prolongs the service life of the battery;

(3) According to the time set by the system, for example, after 10 o'clock or 11 o'clock at night, there are fewer pedestrians and vehicles on the road, and the LED street lights are turned off. Once people or vehicles pass by and enter the sensing area, the infrared light sensing device will transmit the sensed signal The system controller lights up the LED street lights; after a person or vehicle passes by, the LED street lights are turned off after a certain delay, which greatly reduces the power consumption of the battery and improves the energy utilization rate;

(4) The working status data of the system can be uploaded in real time through the power carrier or GPRS, which is convenient for finding faults and solving problems in time, and provides convenience for remote monitoring. the

Description of drawings

Fig. 1 is a schematic block diagram of the structure of the present invention.

Detailed ways

The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings: as shown in Figure 1, the solar LED street lamp monitoring system includes a solar cell assembly, a system controller, an optical sensor, a power supply, at least one LED street lamp, and an infrared light sensing device and a remote data transmission module, the system controller includes a signal processing circuit, an A/D sampling circuit, a main circuit and a microprocessor, the main circuit is composed of a bidirectional DC-DC converter and a charge-discharge switching circuit, and the bidirectional DC-DC The converter is a time-division multiplexing circuit, which is used as the charging circuit between the solar cell module and the battery during the day, and as the discharging circuit between the battery and the LED street lamp at night; the signal processing circuit and the current sampling circuit in the A/D sampling circuit are divided into Time multiplexing circuit, used for charging current sampling during the day and discharging current sampling at night. , the outputs of the solar cell module, the light sensor and the infrared light sensing device are respectively connected to the system controller, and the input of each LED street lamp is respectively connected to the output of the system controller. The power supply includes a commercial power supply and a battery, the outputs of the commercial power supply and the battery are respectively connected to the power terminal of the system controller, and a charging output of the system controller is also connected to the battery. The remote data transmission module includes a power carrier module or a GPRS module, the system controller is connected to the mains line through the power carrier module, and the system controller is connected to the GPRS wireless network through the GPRS module. It also includes a clock circuit whose output is connected to the system controller.

The working principle of the present invention is as follows: the solar cell assembly converts solar energy into electric energy and charges the storage battery, and the charging control and lighting control are mainly completed by the system controller. When charging, the system controller monitors the state of the battery during charging, selects the charging method according to the state of the battery, and prevents the battery from overcharging. When discharging, the system controller monitors the status of the battery during the discharge process. When it detects that the battery is too low, it immediately stops the battery from supplying power to the LED street lights of the load and switches to the mains power supply to protect the battery. The charging and discharging of the battery adopts the maximum power point tracking (MPPT) algorithm, which improves the photoelectric conversion efficiency of the solar panel; uses the pulse width modulation three-stage monitoring method with MPPT to monitor the charging/discharging algorithm of the remaining charge capacity (SOC) of the battery , effectively avoiding overcharge and overdischarge, prolonging the service life of the battery.

The system controller monitors by time and voltage division, and monitors the input power of solar LED street lights according to the different requirements of people for different illumination in different time periods at night, and monitors the output power of solar LED street lights according to the amount of energy absorbed by solar cells during the day. According to the mathematical model of the remaining charge capacity (SOC) of the battery, the remaining capacity of the battery is detected in real time, and then the LED load is automatically adjusted, and the dimming and monitoring of the LED according to the SOC and lighting requirements can further achieve the effect of energy saving.

When night falls, the light sensor senses that the sunlight at night is as low as about 10 lux, and the system controller controls the battery to discharge the LED street lights. The battery provides power for the LED street lights, and the LED street lights are lit until 10:00 or 11:00 at night. , there are no pedestrians on the road, in order to save energy, turn off the LED street lights, once a pedestrian or vehicle passes by, enter the sensing area of the infrared light sensor, the infrared light sensor will transmit the sensed signal to the system controller, and light the LED street light , to provide light for pedestrians or vehicles; after pedestrians or vehicles pass by, the LED street lights will be turned off after a certain delay.

The power carrier module or GRPS module uploads the voltage and current data of each solar cell module in the system, as well as the working status of the battery to the remote control terminal in real time, so as to find faults and solve problems in time, and provide convenience for remote monitoring of the system .

Claims (1)

1. solar LED street lamp supervisory control system, it is characterized in that: it comprises solar module, system controller, optical sensor, power supply, at least one LED street lamp, infrared ray sensing device and remote data transmission module, the output of solar module, optical sensor and infrared ray sensing device is connected with system controller respectively, and each LED street lamp is connected with the output of system controller respectively, described power supply comprises a mains supply and a storage battery, and the output of mains supply and storage battery is connected with the power supply terminal of system controller respectively, and a charging output of system controller is also connected with storage battery, described remote data transmission module comprises power carrier module or GPRS module, system controller is connected with line by power carrier module, system controller is connected with GPRS wireless network by GPRS module, power carrier module or GPRS module are immediately by the voltage and current data of each solar module in system, and the operating state data of storage battery is uploaded to remote control terminal, light sensor senses day illumination, when day at night, illumination was reduced to pre-set threshold value, control storage battery to LED street lamp electric discharge, storage battery is LED street lamp power supply, road lamp power supply, it also comprises a clock circuit, the output of clock circuit is connected with system controller, according to the output of clock circuit, in the few set period of night pedestrian and vehicle, each LED street lamp is extinguished in system controller control, there are pedestrian or vehicle through out-of-date, infrared ray sensing device is transferred to system controller by the signal sensing, controls and lights LED street lamp, when pedestrian or vehicle are default by later process, delay and extinguishes LED street lamp, described system controller comprises signal processing circuit, A/D sample circuit, main circuit and microprocessor, signal processing circuit, A/D sample circuit is connected with microprocessor respectively with main circuit, main circuit is by bidirectional DC-DC converter and discharge and recharge switching circuit and form, bidirectional DC-DC converter is time-sharing multiplex circuit, daytime is as the charge circuit between solar module and storage battery, night is as the discharge loop between storage battery and LED street lamp, during charging, system controller is monitored the state in battery charging process, according to the condition selecting charging modes of storage battery, and prevent accumulator super-charge, during electric discharge, system controller is monitored the state in battery discharging process, when detecting that accumulator electric-quantity is too low, stops immediately the LED street lamp power supply, road lamp power supply of storage battery to load and is switched to mains supply, wherein, accumulator cell charging and discharging adopts MPPT maximum power point tracking MPPT algorithm, promote the photoelectric conversion efficiency of solar module, adopt the pulse-width modulation syllogic monitoring method with MPPT to go to monitor storage battery to remain the charge/discharge algorithm of charged capacity SOC, avoid overcharging and cross and put, current sampling circuit in signal processing circuit and A/D sample circuit is time-sharing multiplex circuit, and daytime is as sampling as discharging current at charging current sampling, night, system controller timesharing, dividing potential drop are monitored, according to night, different time period people require the input power of monitoring LED street lamp to the difference of illumination, according to the power output of solar module endergonic size monitoring on daytime LED street lamp, the Mathematical Modeling that remains charged capacity SOC according to storage battery detects the residual capacity of storage battery in real time, and then automatically adjusts the load of LED street lamp.

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