KR200373646Y1 - Street lamp of power saving type and the control method to use solar cell - Google Patents

Abstract

The present invention detects the amount of light charged in the solar cell is automatically turned on after sunset, and after detecting the presence of pedestrians to provide energy-saving solar street light that can reduce the consumption of unnecessary energy by adjusting the amount of lights, lights and light of the streetlight For the purpose of

To this end, the present invention provides a solar cell for converting incident sunlight into electric power; A charging unit which converts the electrical energy converted by the solar cell into a constant current and charges it; Sensor unit for detecting the amount of light and the presence or absence of pedestrians; A light emitting driver for outputting electric energy charged in the charging unit; An illumination unit which emits light when electric power is supplied through the light emitting driver; And a controller for controlling the light emitting driver to supply different levels of power to the lighting unit according to the light amount detection signal and the pedestrian detection signal applied from the sensor unit.

Description

Power saving solar street light {Street lamp of power saving type and the control method to use solar cell}

The present invention relates to a street lamp using a solar cell, and more specifically, the structure is simple to reduce the initial cost, and greatly increase the service life of the lamp to reduce the cost of frequent lamp replacement as before, If there is no traffic light, it is turned on at the minimum brightness (about 50% brightness), and when the user passes, it is composed of a variable type that lights up at 100% brightness for a certain period of time. It is about a street lamp.

In general, street lights are installed at predetermined distances along roadsides or around parks or facilities, and have a function of illuminating more than a predetermined level of illumination around a road or a specific place after sunset.

In addition, the streetlight is powered by electricity provided through cables and poles from the power supply station (KEPCO). When the installation place is far from the power supply station, electric poles and cables are required as proportional to the distance. Not only was the initial facility cost excessively high, but the electricity required for the street lamps was provided through the cable, so there was a problem in that maintenance costs were additionally required to check whether the cable was shorted at any time.

The recently developed solar street lamps with low pressure sodium lamps installed solar arrays and accumulators that absorb solar energy as a cable replacement for power supply stations in Jeonju, where electricity is stored in the accumulators during the day. However, it has the advantage that the cable is unnecessary because it is a self-generated type that turns on the street light bulb with electricity stored in the battery at night, while the street lights are turned on by a separate timer for controlling the street light at sunset. In order to overcome this problem, a larger number of solar cells and a larger battery (100AH) are used, which leads to a larger device. The lighting for a long time reduces the lamp life, resulting in labor and lamp replacement costs. There was a continuous problem.

Therefore, in consideration of the next 10 years, the solar street light did not feel much difference in terms of power consumption or facility cost compared to general street lamps in addition to the advantage of using only natural alternative energy.

Therefore, in the present invention, the lifespan of the street lamp can be significantly improved, and the solar street lamp can be widely distributed at a more economical and reasonable price by enabling the illuminance of the existing street lamp level with only the technology of the light source and low power consumption. The purpose is to provide.

In addition, the present invention detects the amount of light charged in the solar cell and automatically turns on after sunset, and after detecting the presence of pedestrians to automatically adjust the amount of light emitted, minimizing power consumption and extending the service life of the bulb. It is another object of the present invention to provide a power-saving solar street light that can reduce the labor cost of the frequent bulb replacement and the bulb replacement cost.

In order to achieve the above object, the present invention provides a solar cell unit installed at an upper end of a street lamp main body installed on the ground to convert sunlight into power; A charging unit which converts the electrical energy converted from the solar cell into a constant current to charge the battery; A sensor unit for sensing the amount of light and the presence or absence of pedestrians, comprising: a light emitting driver for outputting electric energy charged in the charging unit; An illumination unit which emits light when electric power is supplied through the light emitting driver; And a controller for controlling the light emitting driver to supply different levels of power to the lighting unit according to the light amount detection signal and the pedestrian detection signal applied from the sensor unit.

The charging unit includes a constant current output means for converting the electrical energy output from the solar cell into a constant current; Overcharge preventing means for controlling the constant current output means by sensing the degree of charge of the battery charging the constant current; And an over-discharge prevention means for controlling the discharge of the battery by sensing the discharge degree of the battery.

The sensor unit includes at least one human body sensor for sensing the infrared rays generated by the human body and converting the infrared signal into a detection signal of a predetermined level; Amplifying means for amplifying the light quantity detecting signal output from the human body detecting sensor; Comparison means for comparing the detected signal amplified by the amplification means with a setting range and outputting a difference thereof; And first switching means which is turned on / off according to the detection signal output from the comparing means and outputs a predetermined signal.

The sensor unit may include: a light amount detecting sensor whose resistance is increased or decreased according to the amount of ambient light; And second switching means turned on / off according to the resistance of the light quantity detecting sensor to apply a predetermined power.

The lighting unit and a plurality of LED lamps; A plurality of LED lamps fixed to each other and formed of a plurality of inclined surfaces having different angles; A plurality of protrusions are arranged at the same angle as the inclined surface of the support plate to include a support bracket for supporting the back of the support plate.

1 is a perspective view of a power-saving solar street light according to the present invention,

Figure 2 is a block diagram showing a power saving solar street light according to the present invention,

3 is a circuit diagram showing a sensor unit of a power-saving solar street light according to the present invention,

Figure 4 is a human body detecting sensor operation of the energy-saving solar street light according to the present invention,

Figure 5a is a perspective view of the lighting unit of the energy-saving solar street light according to the present invention,

Figure 5b is a side view showing the lighting unit of the energy-saving solar street light according to the present invention,

6 is a flow chart showing a control method of the energy-saving solar street light according to the present invention,

Figure 7a is a flow chart showing the overcharge prevention step of the energy-saving solar street light according to the present invention,

Figure 7b is a flow chart showing the over-discharge prevention step of the energy-saving solar street light according to the present invention,

8 is a flow chart illustrating a pedestrian detection step of the energy-saving solar street light according to the present invention.

Explanation of symbols on the main parts of the drawings

10: solar street light 110: solar cell

120: lighting unit 121: LED lamp

122: support plate 123: coupling hole

124: support bracket 130: sensor

131: human body detection sensor 132: light quantity detection sensor

140: pole 150: control unit

160: charging unit 161: constant current output means

162: means for preventing over discharge 163: means for preventing overcharge

164 battery 170 light emitting driver

Hereinafter, a power saving type solar street light will be described in detail with reference to the accompanying drawings based on specific embodiments of the present invention.

1 is a perspective view showing a preferred embodiment of a power-saving solar street light according to the present invention.

The solar tube street light 10 is a solar cell 110 for converting the solar light incident on the solar panel into electrical energy, the illumination unit 120 for emitting the surroundings, and a sensor unit for detecting the amount of light and pedestrians around 130, and the electric pole 140 supporting the solar cell 110, the lighting unit 120, and the sensor unit 130.

The electric pole 140 is tapered in one direction, that is, formed in a diameter gradually wider toward the lower side than the upper side diameter is fixed to the ground to achieve a sense of stability than when they are standing perpendicular to the ground, the top of the pole 140 On the side, the solar cell 110 facing the sun and the lighting unit 120 and the sensor unit 130 facing the ground are installed. The sensor unit 130 is composed of a light amount sensor 132 for detecting the amount of light of the surrounding and a human body sensor 131 for detecting a pedestrian.

The solar street light 10 configured as described above detects the amount of light in the sensor unit 130 at sunset, and outputs a detection signal to recognize the sunset, so that the lighting unit 120 emits light. At this time, the lighting unit 120 which emits light emits light within a range of 50% of the rated light output, and when the pedestrian approaches the predetermined range of the street light, the sensor unit 130 detects it and outputs a pedestrian detection signal. The lighting unit 120 emits 100% light and illuminates the surroundings. When the pedestrian is separated from the sensing area of the sensor unit 130, the illumination unit 120 gradually reduces the light output for a predetermined time, and when the time is completed, emits light again within 50% of the output. In this case, the rated output is an optical output such that the surrounding objects can be clearly distinguished due to the light emitted from the lighting unit 120, and generally corresponds to an optical output having a range of 20 to 30 Lux. Therefore, when the rated output of the lighting unit 120 is 30Lux, when the pedestrian is detected, the output of 30Lux at 25Lux, and when the pedestrian is not detected, outputs faint light of about 10 ~ 15Lux of the lighting unit 120 Control drive power.

Figure 2 is a block diagram showing a power saving solar street light according to the present invention.

The sensor unit 130 includes a human body sensor 131 that detects infrared rays of the human body and outputs a predetermined detection signal and a light amount sensor 132 that detects the amount of ambient light, and the charging unit 160 includes a battery 164. And a constant current output means 161 for converting the electrical energy of the solar cell 110 into a constant current and outputting it to the battery 164 and an overcharge preventing means 163 for preventing overcharging of the battery 164 and the battery ( And overdischarge prevention means 162 for preventing overdischarge of 164.

The lighting unit 120 emits light corresponding to the applied power, the light emitting driver 170 outputs the driving power of the lighting unit 120, and the control unit 150 according to the detection signal of the sensor unit 130 The light emitting driver 170 is controlled.

As shown in FIG. 2, the solar cell 110 converts incident sunlight into electrical energy and outputs the same to the charging unit 160, and the constant current output unit 161 supplies a constant current to the power output from the solar cell 110. Is converted to and output to the battery 164. Accordingly, the battery 164 charges a constant current signal, and the overcharge preventing means 163 detects whether the battery 164 is overcharged based on the maximum charging capacity of the battery 164. Therefore, when the charge amount charged in the battery 164 exceeds the setting range during the day, the overcharge preventing means 163 detects this and cuts off the power applied from the constant current output means 161.

The light amount sensor 132 senses the amount of light in the surrounding area and applies it to the control unit 150, and the control unit 150 turns off the light emitting driver 170 by determining that it is the current day according to the applied light amount detection signal. . Therefore, the lighting unit 120 is turned off during the day as the light emitting driver 170 is turned off.

Afterwards, when the amount of ambient light decreases due to sunset, the light amount sensor 132 detects this and applies a light amount detection signal to the controller 150, and the controller 150 controls the light emitting driver 170. The predetermined power is applied to the lighting unit 120. Therefore, the light emitting driver 170 outputs the power charged in the battery 164 to the lighting unit 120 under the control of the controller 150 to emit light. At this time, the controller 150 controls the light emitting driver 170 to set the level of the current applied to the lighting unit 120 so that the lighting unit 120 emits light within a range of 50% of the rated output. Herein, the lighting unit 120 may use an LED lamp 121 having a power consumption of 1 W to 3 W and a light emission output of 25 to 30 Lux, as shown in FIG. 5.

The current charged in the battery 164 is discharged the current of the level set in the light emitting driver 170 is output to the lighting unit 120, the over-discharge prevention means 162 is the remaining charge capacity of the battery 164 Detects and blocks the discharge of the battery 164 when the charged capacity is below a certain range.

When the pedestrian detection signal is applied from the human body sensor 131, the controller 150 controls the light emitting driver 170 to increase a current applied to the lighting unit 120 to increase the current of the lighting unit 120. Keep the luminous output at 100%. When the pedestrian departure detection signal is applied from the human body sensor 131, the controller 150 controls the light emitting driver 170 for a predetermined time to gradually reduce the driving current of the lighting unit 120 for a predetermined time. When the predetermined time is completed, the light emitting driver 170 is controlled again to maintain the lighting unit 120 at an output of 50%.

3 is a circuit diagram illustrating a sensor unit.

Referring to FIG. 3, at least one human body detecting sensor 131 is provided, and each human body detecting sensor 131 includes amplifying means 133 having first and second op amps OP1 and OP2 at an output terminal. Is connected, and a comparison means 134 including first and second comparators C1 and C2 is connected to an output terminal of the second op amp OP2. The comparing means 134 includes a first comparator C1 and a first transistor Q1 connected to an output terminal of the first comparator C1. In addition, the first switching means 135 connected to the comparing means 134 has a base connected to the output terminal of the second comparator C2 and a second transistor Q2 connected to the output terminal of the first output terminal S1. ) And a light emitting device (LED) at the collector end of the second transistor (Q2).

In addition, the light intensity sensor 132 is connected to an input terminal (+ 5V) to which the + 5V power is applied and the second switching means, and the second switching means is connected to the light intensity sensor 132 in series with a first resistor. A third transistor having a base connected between R1 and the first resistor R1 and the light intensity sensor 132, an input terminal of which is connected to a third output terminal S3, and an output terminal of which is connected to a ground terminal; Q3). In addition, reference numerals S1, S2, and S3 are first to third output terminals and are connected to the controller 150.

The human body sensor 131 is a pyroelectric sensor that detects infrared rays emitted from the human body and converts the infrared rays into electrical signals, and the output signal is applied to the first op amp OP1. Therefore, the first op amp OP1 amplifies the applied signal to a predetermined level and outputs it to the second op amp OP2. The second op amp OP2 is applied from the first op amp OP1. The signal is amplified again and output to the comparing means 134. Accordingly, the comparing means 134 compares the signal applied by the amplifying means 133 with a set signal and outputs a high signal ("High") when the signal is matched and a low signal ("Low") when both signals are not matched.

That is, the first comparator C1 outputs a high signal "High" when the set signal and the detection signal match, and accordingly, the first transistor Q1 is turned on. C2) outputs a low signal "Low". Therefore, since the second transistor Q2 is turned off (“OFF”), a predetermined power is applied to the controller 150 through the first output terminal S1. In this case, the light emitting device LED is turned on. Display pedestrian detection.

The light quantity sensor 132 is a sensor whose resistance is increased or decreased according to the amount of ambient light. When the amount of ambient light is increased, the third transistor Q3 is turned off (“OFF”) as the self-resistance is increased. When the light is applied to the controller 150 or the amount of ambient light is reduced, power applied to the controller 150 is cut off as the third transistor Q3 is turned on.

4 is an operation of the human body sensor according to the present invention.

4, the human body sensor 131 is fixed at a certain height of the electric pole 140 is installed so that at least one human body sensor 131 is directed to the ground at different angles. Therefore, the pedestrian can be detected according to the angle to be oriented, and each human body sensor 131 is directed at a different angle, and thus, when the pedestrian moves, each sensor 131 detects this and outputs a detection signal. That is, the human body sensor 131 outputs a waveform of "A" when there is no pedestrian, and outputs a waveform of "B" when the pedestrian is located within the direct range of the human sensor. do.

Figure 5a is a perspective view showing a fixing structure of the lighting unit according to the present invention, Figure 5b is a side view showing a fixing structure of the lighting unit according to the present invention.

Referring to FIGS. 5A and 5B, the support plate 122 has a plurality of LED lamps 121 fixed to each other to form inclined surfaces having different angles, and the support bracket 124 has a plurality of protrusions of the support plate 122. It is arranged at the same angle as the inclined surface to support the back of the support plate 122.

A printed circuit board (not shown) for transmitting an electrical signal to the LED lamps 121 is formed on the rear surface of the support plate 122, and a plurality of LED lamps 121 are fixed to each of the inclined surfaces, respectively. Orient the ground at an angle of.

In addition, a plurality of coupling holes 123 are formed on both side surfaces of the support plate 122 and are fixed to the connecting means connected to the electric pole 140.

6 is a flow chart showing a control method of the energy-saving solar street light according to the present invention, Figure 8 is a flow chart showing the pedestrian detection step of Figure 6 will be described in more detail the operation of the present invention.

Since the light quantity sensor 132 increases the resistance as the amount of ambient light increases, the third transistor Q3 is turned off, so that a predetermined power is applied to the controller 150. Therefore, the controller 150 determines that it is before sunset according to the light amount detection signal transmitted from the light amount detection sensor 132 and controls the light emitting driver 170 to turn off the LED lamp 121 (S11).

In addition, the solar cell 110 converts the incident sunlight into electrical energy and outputs it, and the constant current output means 161 converts it into a constant current and transfers it to the battery 164 to be charged (S12).

Thereafter, the controller 150 determines whether a light quantity reduction signal is applied from the light quantity sensor 132 (S12). That is, since the amount of light in the surroundings is reduced, the third transistor Q3 is turned on as the self-resistance of the light quantity detecting sensor 132 is turned on, so that a 5V power applied to the controller 150 supplies the third transistor Q3. As it is applied to the ground terminal through the control unit 150 recognizes that the amount of ambient light is reduced.

Accordingly, the controller 150 controls the light emitting driver 170 to control a current within a range of 50% or less of the rated current of the LED lamp 121 to be output. Therefore, the light emitting driver 170 outputs the current charged in the battery 164 to the LED lamp 121. Therefore, the LED lamp 121 emits light by an applied driving power, and a current of 50% or less of the rated current is applied, thereby illuminating the surroundings with a weak lighting enough to allow the surrounding objects to be perceived faintly (S14).

Thereafter, the controller 150 determines whether a pedestrian detection signal is applied from the human body sensor 131 (S15), which will be described with reference to the flowchart of FIG. 8.

When the human body sensor 131 detects infrared light of the human body (S51), the predetermined power is output to the amplifying means 133, and the amplifying means 133 amplifies it and outputs it to the first comparator C1. (S52). Therefore, the first comparator C1 compares the signal applied by the amplifying means 133 with the set signal and applies a high signal to turn on the first transistor Q1 when both are matched within a predetermined range. C2) outputs a low signal (S53).

Therefore, the second transistor Q2 of the first switching means 135 is turned off and a predetermined power is output to the controller 150. At this time, the light emitting device (LED) is turned on (“ON”) to display the pedestrian detection (S54, S55).

Therefore, the controller 150 controls the light emitting driver 170 as the pedestrian detection signal is applied from the human body sensor 131 to increase the amount of current applied to the LED lamps 121 and 120. Therefore, the light emitting driver 170 outputs the maximum rated current of the LED lamp 121, and the LED lamp 121 is changed from dim lighting to bright lighting (S16). This allows pedestrians to act in bright light.

Thereafter, the controller 150 determines whether a pedestrian departure or movement detection signal is applied from the human body sensor 131 (S17). That is, as the pedestrian is out of a certain range, the output signal of the human body sensor 131 is stopped or weakened, and the first comparator 1 compares the output signal with a set signal and outputs a low signal. ) Is off. Therefore, since the second comparator 2 outputs a high signal and the second transistor Q2 is ON, the power output to the controller 150 is output to the ground terminal, and the light emitting device LED Is off to indicate the departure of the pedestrian. The detection of the human body sensor 131 is performed by the sensors 131 oriented in each direction in accordance with the movement of the pedestrian sequentially, the control unit 150 is finally applied as the same signal from all the sensors It is determined that the pedestrian has left.

Therefore, the controller 150 operates a timer to count a predetermined time (S18), and simultaneously controls the light emitting driver 170 to sequentially reduce the amount of current applied to the LED lamp 121. Therefore, when a predetermined time elapses, the LED lamp 121 illuminates the surroundings as the initial level before the pedestrian detection (S19).

That is, the present invention illuminates the surroundings with 50% or less of the rated light emission rate before the pedestrian is detected, and illuminates the surroundings at 100% of the rated light emission rate when the pedestrians are detected, and then detects the time when the pedestrians deviate. As a result, the brightness is reduced to finally return to the initial lighting. Therefore, the solar street light according to the present invention can reduce the unnecessary energy consumption by adjusting the brightness by detecting the pedestrians.

7a and 7b is a flow chart showing a charging step according to the present invention.

Referring to FIG. 7A, when the solar light is converted into electrical energy by the operation of the light amount sensor 132 and the controller 150 and charged in the battering (S31 and S32), the overcharge preventing means 163 is described. In consideration of the rated charging capacity of the battery 164, it is determined whether the battery 164 is overcharged (S33).

When it is determined that the overcharge preventing means 163 is currently being charged beyond the charging capacity of the battery 164, it blocks the charging of the battery 164 (S34).

Referring to FIG. 7B, when the controller 150 controls the light emitting driver 170 by the pedestrian detection signal of the human body sensor 131 as described above, the light emitting driver 170 is connected to the battery 164. The predetermined power is discharged to supply power to the LED lamp 121 (S41).

At this time, the over-discharge prevention means 162 detects the capacity currently charged in the battery 164, and if the capacity charged in the battery 164 is detected below a predetermined range (S42), the discharge of the battery 164 Block (S43). This is continued until the electrical energy from the solar cell 110 is charged to the battery 164 again and more than the predetermined range.

As described above, the energy-saving solar street light according to the present invention is automatically turned on and off by sensing the amount of ambient light, and the unnecessary energy consumption can be reduced by controlling the intensity of the light according to the presence or absence of pedestrians, thereby making it easy to manage the equipment. In addition, as described above, by detecting the presence of pedestrians, proper lighting is controlled, and overcharge and overdischarge are prevented, thereby extending the life of the battery.

In addition, the present invention can be operated as a more economical and energy-saving solar street lamp because it is composed of a variable type in which the brightness of the street light lamp is variable, which significantly improves the service life of the lamp and can produce a level of street light level with low power consumption. There is an advantage to that.

Claims (3)

A solar cell 110 for converting incident sunlight into electric power; A charging unit 160 converting the electrical energy converted by the solar cell 110 into a constant current and charging the battery; Sensor unit 130 for detecting the amount of light and the presence of pedestrians around; Illuminating unit 120 which emits light when power is supplied; The charging unit 160 includes a constant current output means 161 for converting electrical energy output from the solar cell 110 into a constant current, a battery 164 for charging a constant current output through the constant current output means 161, Overcharge preventing means 163 for controlling the constant current output means 161 by sensing the degree of charge of the battery 164, and controlling the discharge of the battery 164 by sensing the discharge degree of the battery 164 Over discharge prevention means 162, The lighting unit 120 includes a plurality of LED lamps 121, a support plate 122 forming a plurality of inclined surfaces having different angles at which the plurality of LED lamps 121 are fixed, and a plurality of protrusions supporting the support plate ( It is arranged at the same angle as the inclined surface of 122, and includes a support bracket 123 for supporting the back of the support plate 122, A light emitting driver 170 for outputting electric energy charged in the charging unit 160; A control unit connected to the light emitting driver 170 and controlling the light emitting driver 170 to supply different levels of power to the lighting unit 120 according to the light amount detection signal and the pedestrian detection signal applied from the sensor unit 130; Energy-saving solar street light comprising a 150). The method of claim 1, wherein the sensor unit 130 includes at least one human body sensor (131) for detecting the infrared rays generated by the human body and converting them into a detection signal of a predetermined level; Amplifying means (133) for amplifying the light quantity detecting signal output from the human body detecting sensor (131); Comparison means (134) for comparing the detected signal amplified by the amplification means (133) with a set range and outputting a difference thereof; Energy-saving solar street light, characterized in that it comprises a first switching means (135) on / off in accordance with the detection signal output from the comparison means 134 to output a predetermined signal. The method of claim 2, wherein the sensor unit 130 includes a light amount sensor 132, the resistance of which increases or decreases in accordance with the amount of ambient light; Energy-saving solar street light, characterized in that it comprises a second switching means (136) is turned on / off according to the resistance of the light amount sensor 132 to apply a predetermined power.