KR102486328B1 - Solar street lighting - Google Patents

Abstract

The present invention relates to a solar street light. Provided is the solar street light, which minimize input of commercial power by increasing reliability when detecting a charge state of a storage battery in which the solar power generation source of a solar cell is charged, and monitors illumination intensity of the street light and the voltage state of the storage battery together when the street light is turned on, so that the detection and monitoring of the charge state of the storage battery is highly reliable and commercial power can be used efficiently.

Description

Solar Street Light { SOLAR STREET LIGHTING }

The present invention relates to a solar street light, and more particularly, by using a solar cell installed in the street light itself to store the power required for the lamp of the street light in a storage battery during the daytime and charging power for the storage battery at night. The present invention relates to a solar street light capable of efficiently lighting a street lamp by turning on a street lamp and supplying commercial power when the storage battery is discharged.

In general, street lights, security lights, etc. (hereinafter referred to as 'street lights') are installed around roads, parks or facilities to illuminate a specific place after sunset with a certain intensity of illumination or higher. It receives commercial power through and lights the lamp at night.

However, even when the use of commercial power increases rapidly according to the season, such as summer or winter, a lot of power must be input as the street lights must be kept lit to ensure safety.

Accordingly, a solar street light capable of self-supplying power by solving the power supply problem of the conventional street lamp has been proposed, and for example, Registration Patent No. 10-1106304 (Reference 1) has been proposed.

Reference 1 relates to a solar street light, and more specifically, a microcontroller configured in a power control device by self-appropriating power required for a lamp of a remotely controlled street light by a power generation method composed of a photovoltaic panel installed therein. By detecting the solar panel voltage, current, storage battery voltage, etc., and controlling the solar power generation voltage to be stored in the storage battery with maximum efficiency, daytime and nighttime are judged and the power stored in the storage battery is supplied to the load at night to create a street light It relates to a solar street light that lights up a lamp, cuts off a load during the daytime, and controls a storage battery charging operation to be performed and simultaneously driven by a commercial power source.

By the way, although the solar street light of Reference 1 controls the lighting or turning off of the lamp according to the illumination around the lighting device, this is a commercial power unit when the microcontroller detects the storage battery charging voltage and the detected storage battery power is over-discharged. As streetlights are turned on by receiving commercial power, the detection of ambient illumination only serves to turn on or turn off lamps, so its function is extremely limited.

In addition, the solar street light of Reference 1 consists only of a structure that monitors the charging voltage of the storage battery to determine whether the power of the storage battery is sufficient, and the reliability of detecting the charging state of the storage battery is low. There is also a big problem in that there is a high risk of turning off streetlights, and there is also a big problem in unnecessary waste of power when the streetlights are unnecessarily supplied with commercial power.

Reference 1: Registered Patent No. 10-1106304

Therefore, in order to solve the problems of the prior art, the present invention provides a solar street light that can minimize the input of commercial power by increasing reliability when detecting the state of charge of a storage battery in which solar cell power is charged. There is a purpose.

In particular, the present invention uses a solar cell to store photovoltaic power generation power in a storage battery during the daytime, turn on a street lamp using the charging power of the storage battery at night, and monitor the charging state of the storage battery by continuously monitoring the illuminance of the street lamp lamp. The purpose is to provide a solar street light that can induce the use of efficient commercial power by inputting commercial power for the lighting of the street lamp according to.

The present invention to solve such a technical problem;

A street light lamp including a plurality of LEDs, a solar cell that generates power by photovoltaic power generation, a storage battery that charges the generated power generated by the photovoltaic power generation of the solar cell, and a commercial power source for lighting the street lamp It provides a solar street light characterized in that it includes an SMPS that converts into direct current power for the storage battery and a power control means for selectively inputting the charging power of the storage battery or the DC power of the SMPS to the street lamp.

At this time, the power control means controls a switching unit for selectively inputting the charging power of the storage battery and the DC power of the output side of the SMPS to the street lamp, an illuminance sensor for a lamp that monitors the lamp illumination of the street lamp, and the switching unit to control the In the state in which the charging power of the storage battery is supplied to the street lamp and turned on, the illuminance of the illuminance sensor for the lamp is monitored, and if it is less than the set lamp illumination, the switching unit controls the charging power to block the charging power of the storage battery from being input to the street lamp, It is characterized in that it includes a power control unit for inputting DC power on the output side of the SMPS to the streetlight lamp and turning it on.

And, the power control means further includes a day and night information providing unit providing day and night information on whether it is day or night; When the day/night information of the day/night information providing unit is determined to be night, the power control unit controls the switching unit to input the charging power of the storage battery to the street lamp and monitors the illuminance of the illuminance sensor for the lamp in a state in which the lamp illuminance is turned on and is less than the set lamp illuminance. If it is, it is characterized in that the switching unit is controlled to block charging power of the storage battery from being supplied to the street lamp, and to supply DC power at the output side of the SMPS to the street lamp.

In addition, the power control means further comprises a voltage measurement unit for measuring the storage battery voltage of the storage battery; The power control unit controls the switching unit to input the charging power of the storage battery and monitors the lamp illuminance of the illuminance sensor for the lamp in a state where the streetlight lamp is turned on and at the same time monitors the storage battery voltage of the storage battery through the voltage measuring unit. If the lamp illuminance of the illuminance sensor for lamp is less than the set illuminance or the battery voltage of the storage battery is less than the set voltage through the voltage measuring unit, it is judged as discharge of the battery and controls the switching unit to block the charging power of the battery from being input to the street lamp, and SMPS It is characterized in that the direct current power of the street lamp is turned on by inputting the street lamp.

At this time, the power control unit 540 receives day/night information from the day/night information providing unit or checks time information through its own timer to determine whether it is daytime or nighttime, and controls the switching unit to charge power for the storage battery when it is determined to be a nighttime state. It is characterized in that the input to the street light lamp and the DC power of the SMPS is blocked from being input to the street light lamp.

According to the present invention, after charging the solar power generation power of the solar cell to the storage battery, the street lamp is turned on at night, and when the storage battery is discharged, commercial power is converted from SMPS to DC power and used for lighting the street lamp, thereby reducing the use of commercial power. It can faithfully perform the function of a street light while minimizing it.

In addition, according to the present invention, the illuminance of the street lamp itself and the terminal voltage of the storage battery are monitored together, and if either of the measured values is less than the set value, it is determined that the storage battery is discharged, and commercial power is used. Reliability and efficiency when detecting the charging state of the storage battery are high It also has the advantage of being able to use commercial power.

1 is an overall control configuration diagram of a solar street light according to the present invention.
2 is a detailed configuration diagram of a power control module of a solar street light according to the present invention.

Hereinafter, the characteristics of the solar street light according to the present invention will be understood by an embodiment described in detail with reference to the accompanying drawings.

1 and 2, the solar street light according to the present invention includes a street light lamp 100 installed outward from one side of the upper part of a lamp post whose lower end is fixed to the ground, and, for example, the above A solar cell 200 installed on the upper part of the lantern to generate power by photovoltaic power generation, a storage battery 300 to charge the generated power generated by photovoltaic power generation of the solar cell 200, and a commercial power source for street lighting An SMPS (400) that converts into DC power for turning on the lamp (100) and power control means for selectively inputting the charging power of the storage battery (300) or the DC power of the SMPS (400) to the streetlight lamp (100) (500).

Hereinafter, the configuration of each part of the present invention will be described in detail.

First, the lower end of the pole of the solar street light is fixed to the ground, the street lamp 100 is installed on the upper side, and the solar cell 200 is installed on the upper side of the street lamp 100, that is, the top of the pole to generate solar power can be installed.

In addition, the battery 300, the SMPS 400, and the power control means 500 are installed on the light pole so that they can be stably driven from external environments such as temperature, humidity, or physical shock.

At this time, it is preferable to apply various LED lamps to the street light lamp 100, but it is not limited thereto, and various lamps such as sodium lamps may be applied as needed.

In particular, the street light lamp 100 is made of a LED board in which a plurality of LEDs are mounted on a PCB board inside the lamp housing to prevent malfunction or failure due to external rainwater or foreign substances flowing into the LED board. It is natural that it is made of a composition that has been waterproofed so that it can be done.

In addition, the solar cell (or solar cell) 200 refers to a device capable of converting solar energy into electrical energy, and when light of energy greater than the forbidden band is irradiated to a semiconductor junction region having a P-N junction surface, electrons and holes When this occurs, the internal electric field formed in the junction area moves electrons to the N-type semiconductor and holes to the P-type semiconductor, and an electromotive force is generated. The electrodes attached to the N-type semiconductor and the P-type semiconductor become negative electrodes and positive electrodes, and direct current can be taken. As the semiconductor material of these solar cells, not only silicon but also gallium arsenide, cadmium tellurium, cadmium sulfide, indium phosphide, or composites between these materials are used, but silicon is generally used.

The generated power generated by the photovoltaic power generation produced in such a solar cell 200 is charged to the storage battery 300, and the charging power charged in the solar cell 200 is output by the power control means 500. The street light lamp 100 can be turned on or off according to the controlled input or shutdown of the street light lamp 100 .

The SMPS (Switched Mode Power Supply) 400 is a power supply device and uses a switch control method that converts AC power to DC power using a switching transistor or the like. It is a DC stabilized power supply that stabilizes the output by controlling the on-off time ratio of the semiconductor switch element, and is widely used in most electronic devices and equipment due to its high efficiency, small size and light weight. In many cases, the stability and precision of electronic circuit operation depend on the quality of the power supply. In general, methods for converting and supplying stable power from batteries and commercial AC power include a series regulator method and a switched mode method. The linear control method used in TV receivers or CRT monitors has simple surrounding circuits and is inexpensive, but has disadvantages in that it generates a lot of heat, has low power efficiency, and is bulky. On the other hand, the switching mode method has disadvantages in that it is expensive, has a complicated circuit, and generates a lot of output noise and electromagnetic waves due to high-frequency switching, but has the advantage of generating almost no heat, having high power efficiency, and having a small volume.

Such an SMPS (400) converts AC power, which is a commercial power supply (401) provided as a power supply source such as KEPCO, into DC power using a switching transistor and outputs it, and the DC power of the SMPS (400) controls power. As the output is controlled by the means 500 and turned on or off to the street lamp 100, the street lamp 100 can be turned on or off.

On the other hand, the power control means 500 selectively inputs the charging power of the storage battery 300 or the DC power of the SMPS 400 to the streetlight lamp 100, and provides day and night information on whether it is daytime or nighttime. a day/night information providing unit 510 that selectively inputs the charging power of the storage battery 300 and the output side DC power of the SMPS 400 to the street lamp 100; a switching unit 520; ), if the day/night information of the lamp illuminance sensor 530 for monitoring the lamp illumination and the day/night information providing unit 510 is determined to be night, the switching unit 520 is controlled to supply the charging power of the storage battery 300. In the state in which the street light lamp 100 is input and turned on, the illuminance of the illuminance sensor 530 for the lamp is monitored, and if it is less than the set lamp illuminance, the switching unit 520 is controlled to supply the charging power of the storage battery 300 to the streetlight. It includes a power control unit 540 that cuts off input to the lamp 100 and inputs DC power on the output side of the SMPS 400 to the street lamp 100 to turn it on.

Hereinafter, the configuration of each part of the power control means 500 will be described in more detail.

First of all, the day/night information providing unit 510 functions to provide day/night information for determining daytime or nighttime conditions in order to turn on or off a street light. The day/night information providing unit 510 may be composed of, for example, a timer providing time information, or may be composed of an illuminance sensor for day/night confirmation to determine whether it is day/night.

Therefore, when the day/night information providing unit 510 is formed of a timer, the power control unit 540 can determine whether it is night time or day time when the time information provided by the day/night information providing unit 510 is input, and through this It can be judged by daytime or nighttime conditions. In addition, when the day/night information providing unit 510 is composed of an illuminance sensor for day/night confirmation, the power control unit 540 compares the illumination intensity information for day/night confirmation provided by the day/night information providing unit 510 with the set illuminance for day/night. It can be judged by daytime or nighttime conditions. The configuration of the day/night information providing unit 510 may be configured in various configurations.

In addition, the switching unit 520 may be composed of various switching means such as semiconductor switching elements and relays, and is switched according to the switching control signal of the power control unit 540 to charge power of the storage battery 300 and SMPS 400. The DC power on the output side of is selectively put into the street lamp 100. This switching unit 520 is connected to the output side of the storage battery 300 and the SMPS 400, and when the charging power of the storage battery 300 is input to the street lamp 100, the DC power of the SMPS 400 is cut off, When the DC power of the SMPS (400) is input to the street lamp (100), the charging power of the storage battery (300) is cut off.

In addition, the illuminance sensor 530 for the lamp may be installed inside the street lamp 100 as an example to monitor the lamp illuminance of the street lamp 100 . The illuminance sensor 530 for the lamp detects the lamp illuminance of the street lamp 100, and the detected lamp illuminance is input to the power control unit 540 and used for controlling the switching unit 520.

Meanwhile, the power control unit 540 receives the day and night information from the day and night information providing unit 510 to determine whether it is a day or night state, and controls the switching unit 520 to control the storage battery 300 in the case of the night state. ) is supplied to the street light lamp 100 and turned on, and in this state, the lamp illuminance of the lamp illuminance sensor 530 is monitored and compared with the set illuminance, and if the lamp illuminance is less than the set illuminance, the switching unit 520 is controlled to block charging power of the storage battery 300 from being supplied to the street lamp 100, and DC power of the SMPS 400 is supplied to the street lamp 100 to turn on the street lamp 100. let it

In this case, the power control unit 540, when a timer is provided therein, can determine whether it is day or night only with time information without receiving day and night information from the day and night information providing unit 510. In this case, the power control unit 540 may be composed of a microcomputer. Of course, the power control unit 540 can be operated by receiving the charging power of the storage battery or DC power of the SMPS (400).

Meanwhile, a voltage measuring unit 550 may be further provided at the terminal of the storage battery 300 to measure the terminal voltage of the storage battery 300, that is, the storage battery voltage, and this storage battery voltage is input to the power control unit 540. Accordingly, in the night state, the power control unit 540 first controls the switching unit 520 to input the charging power of the storage battery 300, and in a state in which the street lamp 100 is turned on, the illuminance sensor 530 for the lamp At the same time as monitoring the lamp illuminance, the battery voltage of the storage battery 300 is also monitored through the voltage measuring unit 550, and the lamp illuminance of the lamp illuminance sensor 530 is less than the set illuminance or the voltage measuring unit 550 If the battery voltage of the battery 300 is less than the set voltage through ), it is determined that the battery is discharged and the switching unit 520 is controlled to block the charging power of the battery 300 from being input to the street lamp 100 and SMPS ( The DC power of 400) is put into the street lamp 100 to turn on the street lamp 100. This configuration monitors the lamp illumination of the street lamp 100 and the charging power of the storage battery 300 together, and if either value of the two is less than the set value, it is determined that the storage battery 300 is over-discharged, and the storage battery 300 is discharged and switch the power supply promptly, enabling the stable operation of the solar street light system.

Hereinafter, a driving example of a solar street light according to the present invention will be described with reference to FIGS. 1 and 2 .

First, the power control unit 540 of the power control means 500 for controlling the lighting and turning off of the solar street light first determines whether it is daytime or nighttime. In this case, the power control unit 540 of the power control means 500 receives day/night information from the day/night information providing unit 510 or checks time information checked through its own timer to determine whether it is daytime or nighttime.

On the other hand, the power control unit 540 controls the switching unit 520 in daytime to ensure that both the charging power of the storage battery 300 and the DC power output of the SMPS 400 are input to the streetlight lamp 100. block it In this state, the power generated by the photovoltaic power generated by the solar cell 200 is charged to the storage battery 300 .

And when the power control unit 540 determines that it is a night state, it controls the switching unit 520 to supply the charging power of the storage battery 300 to the street lamp 100, and direct current power of the SMPS 400 to the street lamp ( 100) is blocked to turn on the street lamp 100.

In this way, when the street light lamp 100 is turned on using the charging power of the storage battery 300, the power control unit 540 monitors the lamp illuminance of the illuminance sensor 530 for the lamp and the terminal voltage of the storage battery 300, that is, the storage battery voltage. do.

Accordingly, the power control unit 540 determines that the battery is discharged when the lamp illuminance of the illuminance sensor 530 for the lamp is less than the set illuminance or the battery voltage monitored by the voltage measurer 550 is less than the set voltage, and switches the switching unit 520 on. By controlling, charging power of the storage battery 300 is blocked from being input to the street lamp 100, and DC power of the SMPS 400 is supplied to the street lamp 100 to turn on the street lamp 100.

Thereafter, the power control unit 540 receives day and night information from the day and night information providing unit 510 or checks the time information checked through its own timer to continuously determine whether it is day or night. By controlling 520, both the charging power of the storage battery 300 and the DC power output of the SMPS 400 are blocked from being input to the street lamp 100, thereby turning off the street lamp 100. Of course, during the daytime, the power generated by the photovoltaic power generation produced by the solar cell 200 is charged to the storage battery 300.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art can make various modifications and variations without departing from the essential characteristics of the present invention. The protection scope of should be interpreted by the claims below, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

100: street lamp 200: solar cell
300: storage battery 400: SMPS
500: power control means 510: day and night information providing unit
520: switching unit 530: illuminance sensor for lamp
540: power control unit 550: voltage measurement unit

Claims (5)

A street lamp 100, a solar cell 200 generating power by photovoltaic power generation, a storage battery 300 charging power generated by photovoltaic power generation of the solar cell 200, and a commercial power source SMPS (400) converts into DC power for turning on the street lamp (100), and power for selectively inputting the charging power of the storage battery (300) or the DC power of the SMPS (400) to the street lamp (100). including control means 500;
The power control means 500 includes a day/night information providing unit 510 providing day/night information on daytime or nighttime, and the charging power of the storage battery 300 and the output side DC power of the SMPS 400 selectively to a street lamp lamp. A switching unit 520 input to 100, a lamp illuminance sensor 530 for monitoring the lamp illuminance of the street lamp 100, and a voltage measuring unit 550 for measuring the storage battery voltage of the storage battery 300 ), and when the day and night information of the day and night information providing unit 510 is determined to be night, the switching unit 520 is controlled to supply the charging power of the storage battery 300 to the street lamp 100 in a state where it is turned on The lamp illuminance of the illuminance sensor 530 for the lamp and the storage battery voltage of the voltage measuring unit 550 are monitored, and if the lamp illuminance is less than the set illuminance or the storage battery voltage is less than the set voltage, it is determined that the battery 300 is discharged. to control the switching unit 520 to block the charging power of the storage battery 300 from being input to the street lamp 100, and to supply the DC power output side of the SMPS 400 to the street lamp 100 to A solar street light comprising a power control unit 540 for turning on.
According to claim 1,
The power control unit 540 receives day/night information from the day/night information providing unit 510 or checks time information through its own timer to determine whether it is daytime or nighttime, and controls the switching unit 520 when it is determined to be a nighttime state. The solar street light, characterized in that the charging power of the storage battery 300 is input to the street lamp 100 and DC power of the SMPS 400 is blocked from being input to the street lamp 100.
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