CN102595716A - Solar light-emitting diode (LED) street lamp monitoring system - Google Patents

Abstract

The invention discloses a solar light-emitting diode (LED) street lamp monitoring system which comprises a solar cell module, a system controller, a light sensor, a power supply, LED street lamps, an infrared light-sensing component and a remote data transmission module, wherein outputs of the solar cell module, the light sensor and the infrared light-sensing component are respectively connected with the system controller; each LED street lamp is connected with the output of the system controller; the power supply comprises a commercial power supply and a storage battery; the remote data transmission module comprises a power carrier module or a General Packet Radio Service (GPRS) module; the system controller is connected with the commercial power supply by the power carrier module; and the system controller is connected with a GPRS wireless network by the GPRS module. According to the invention, the controller protects the storage battery so as to prolong the service life of the storage battery; street lamps are turned off when nobody passes through and turned on when the infrared light-sensing component senses pedestrians or vehicles; and the solar LED street lamp monitoring system has the characteristics of low power consumption of the storage battery and high energy source use ratio.

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 (3)

1. The solar LED street lamp monitoring system is characterized in that: it 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, a solar cell assembly, a light sensor and The output of the infrared photosensitive device is connected with the system controller respectively, and each LED street lamp is connected with the output of the system controller respectively; The power supply includes a mains power supply and a storage battery, and the output of the mains power supply and the storage battery is connected with the system respectively. The power supply terminal of the controller is connected, 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 is connected with the mains line through the power carrier module, and the system controller Connect with GPRS wireless network through GPRS module. 2. The solar LED street lamp monitoring system according to claim 1, characterized in that it also includes a clock circuit, and the output of the clock circuit is connected to the system controller. 3. The solar LED street lamp monitoring system according to claim 1, wherein the system controller includes a signal processing circuit, an A/D sampling circuit, a main circuit and a microprocessor, a signal processing circuit, an A/D The sampling circuit and the main circuit are respectively connected with the microprocessor, and the main circuit is composed of a bidirectional DC-DC converter and a charging and discharging switching circuit.