JPH0215596A - Illumination lamp with solar cell - Google Patents

Abstract

PURPOSE:To make it possible to reduce the power consumption of an illumination lamp with solar cell by continuously operating the light source for a specified time after the sunset, operating it at every time when the existence of a passenger or the like is detected at midnight, thereby ensuring the safety of passenger till midnight. CONSTITUTION:The output voltage of a solar cell 1 is sufficiently high when the circumferential condition are bright enough at day time, and a secondary call 2 is charged by means of the output power. When it is dark, a light source 3 is put on for a specified time according to the detection results of an illumination detector 5, and after the specified time, the source 3 is put off. When a human body detecting part 1 is operated as it detects the existence of a passenger or the like even after the source 3 is put off, the light source 3 is put on. As a result, the lamp 3 is put on continuously only at the time when there are many passengers after the sunset and it is put on for only a necessary time when there is a passenger or the like around it at midnight after the sunset. It is thus possible to ensure the safety of passenger as well as to reduce the power consumption.

Description

[Detailed description of the invention] (b) Industrial application fields The present invention relates to a lighting lamp with solar cells.

←) Conventional technology As shown in Japanese Utility Model Publication No. 65-9048, conventional lighting lamps of this type charge a secondary battery using a solar cell, and set the timer from that time when the surrounding area becomes dark due to sunset. The lamp is turned on for a predetermined period of time (for example, 5 hours), and the lamp is turned off after the set period of time has elapsed, making it convenient for lighting in places where commercial AC power cannot be used.

However, the above W! ! Since the lights turn off after the set time has elapsed, when used for purposes such as street lights, they will not be illuminated late at night after the lights have been turned off, and this will pose safety and crime prevention problems for passersby on dark roads at night. be. In addition, although the above configuration can reduce power consumption compared to a configuration in which the lights are turned on continuously from sunset to dawn, the power consumption is still quite large, especially when the timer setting time is increased in view of the above problem. In order to cover the power consumption, solar cells and secondary batteries were required to be quite large, resulting in high costs.

(c) Problems to be Solved by the Invention The present invention provides lighting with solar cells that can be used in street lights, etc. to ensure the safety of passersby until late at night, is useful for crime prevention, and is inexpensive by reducing power consumption. It provides light.

B) Means for Solving the Problems The solar battery-equipped lighting lamp of the present invention comprises: a solar battery that generates power in response to incident light; a secondary battery that is charged by the output of the solar battery; and a secondary battery that is charged by the output of the solar battery. a light source that is turned on by a light source, an illuminance detection section that detects brightness, a timer section that issues a control signal according to the detection result of the illuminance detection section, and a human body that is detected and the detection result and the detection result of the illuminance detection section. The fP feature is composed of a human body detection section that issues a control signal in response to the timer, and a lighting control section that controls lighting of the light source based on control signals from the human body detection section and the timer section.

(E) Effect When the surrounding area becomes dark, the light source is turned on for a predetermined period of time according to the detection result of the illuminance detection section, and is turned off after the elapse of the predetermined period of time. However, even after the lights are turned off, if there is a passerby and the human body detection unit is activated, the light source is turned on each time.

(F) Embodiment FIG. 1 shows a circuit diagram of a street light which is an embodiment of the present invention. ) is a solar cell that generates electricity according to the incidence of light; (2)
) is a secondary battery charged by the output of the solar cell, (3
) is a lamp as a light source lit by the secondary battery, (
4) is a diode for backflow prevention, (5) is an illuminance detection unit that detects the brightness of the surrounding environment, and reference signal source (6)
and the output level of the solar cell (1) as a reference signal source (6).
A first comparator (7) is configured to compare the signal level with the signal level of the first comparator (7).

(8) is a timer section that generates a first control signal according to the detection result of the illuminance detection section (5), which drives the first timer circuit (9).

(IQl is a reference signal source ttU, an infrared detector 1z,
An amplifier (131) that amplifies the output signal of the infrared detector, a second comparator I that compares the output 4it of the amplifier with the signal level of the reference signal source fill, and one side of which receives the output signal of the second comparator. A human body detection unit consisting of an AND gate 09 into which the output signal of the illuminance detection unit (5) is inverted and input to the other side, and a second timer circuit ue activated by the output of the AND gate, It detects the presence and movement of a human body within the visual field of z, and issues a second control signal in accordance with the detection result and the detection result of the illuminance detection g(5).

1) n is a lighting control unit that controls the lighting of the lamp (31) based on the first and second control signals from the human body detection unit C1l and the timer unit (8); , or gate α3 through the resistance ul't-
Connect the output of the lamp (3) to the secondary battery (2).
The transistors are connected in series with each other.

FIG. 2 shows a perspective view of the exterior, in which the panel with the solar cell Il+ is attached to the top of a ball fence installed outdoors, facing almost upward.

Ω is a light fixture attached to the ball, and lamp 1
3) It is built in so that it faces all the way downwards, and if there is a person around, the presence can be detected by the human body detection part ■. A hair is provided and an infrared detector (12
1, and the detection window f241 is provided with a lens 4 and an infrared transmission filter (not shown) so that the infrared detection 4 and 2 can reliably detect people in a desired range. Battery (2)?Other circuit components are also built into the lamp.

Next, the operation of Book 9, the light lamp, will be explained with reference to the time chart of FIG. In FIG. 5, a indicates the brightness of the surrounding environment, and b-/ indicates the waveform at points 5 to 1 in FIG. 1, respectively.

When the surrounding environment is bright enough during the day, solar cells]1)
The output voltage of the solar cell (1) is sufficiently high, and the solar cell (1) charges the secondary battery (2) with its output power. Also, the output voltage of the solar cell (1) at this time is higher than the signal level of the reference signal source (6), and the output of the first comparator (7) is at a high level (hereinafter referred to as high level t-H, The low level is abbreviated as L], and the first timer circuit (9) does not operate and its output C1, that is, the first control signal is L. On the other hand, the infrared detector (121) The field of view is monitored through the detection window C! 41, and when the presence of a person is detected there, the second comparator (14 to However, when the output of the illuminance detection section (5) is H,
The output of Q51 is L, the output of the second timer circuit is e,
That is, the second control signal is L regardless of the detection result of the infrared detector (1z. At this time, the output f of the or game) 181 is also L, so the transistor field is not conductive, and when the surroundings are bright, it is With or without the lamp (
3) is off.

When the surrounding environment becomes dark due to sunset and the output voltage of the solar cell (1) decreases, the secondary battery (2) is no longer charged. When the illuminance detection unit (5) detects that the ambient brightness has decreased based on the comparison result between the output pressure of the solar cell (1) and the reference signal source (6), the first comparator (7) The output signal changes from H to L. The first timer circuit (9) of the timer section (8) starts operating when the output falls 9, and the first timer circuit (9) of the timer section (8) starts operating at the falling edge of the output (9), and the first timer circuit (9) remains in operation for the set time 1) (for example, 2 hours). Let the control signal be H. When this first control signal is H, the output of the OR gate (l& is H regardless of the detection result of the infrared detector (17J)), the transistor peak is conductive for the set time t1, and the lamp (3) is turned on. The light is lit by the power stored in the secondary battery (2).

Therefore, after the set time t1 has elapsed, the first
The control signal returns to L, the output of the OR gate σ& becomes L, and the lamp (3) goes out, but even after that, the output of the illuminance detection section (5) remains L while the surrounding environment is dark. Therefore, during this period, when an H signal is applied to the output d of the second comparator (2) as a result of the detection by the infrared detector dz, the output of the anti-game ttts becomes H, and the second timer circuit (1
61 starts operating, and the second control signal becomes H for the set time tz (for example, 2 minutes). This second control signal is H
Also when this is the case, the output I of (or game) file becomes H, and the lamp (3) lights up for the set time t2.

That is, according to Honomizo Sei, the lamp (3) is turned on continuously only during the time t1 when there are many people passing by after sunset, and after that, the lamp (3) is turned on continuously during the time t1 when there are many people passing by, and after that, the lamp (3) is turned on continuously during the time t1 when there are many people such as passersby.
It is possible to only turn on the light. Therefore, the lamp (3) is not left on continuously until late at night when there are few people, so power consumption is reduced. Furthermore, when there are passersby late at night, the lamp (3) can be turned on each time to ensure the safety of the passerby, and the lamp (3) can also be turned on to attract the attention of passersby, which is desirable from the viewpoint of crime prevention.

For example, for a conventional configuration that uses a 10W fluorescent lamp as a light source and lights continuously for 5 hours after sunset, a solar cell + 1
) must have a maximum output Pmax of at least 25W. On the other hand, if a 10W fluorescent lamp is turned on continuously for 2 hours (t1) after sunset according to the present invention, and it is turned on 12 times for 2 minutes (t2) due to late-night passersby, the solar cell will be j need to have a pmax of 12W.Therefore, the solar cell fi+ or the secondary battery (2) may be small and inexpensive; There are no longer very strict requirements for strength such as wind resistance, making it possible to create lighting lamps that are generally cheaper.Furthermore, if solar cells (1) become smaller, there will be fewer restrictions on design and installation locations.

In this embodiment, the illuminance detection section (5) is connected to the solar cell t.
Although the brightness is detected using the output of l+, a separate illuminance sensor may be provided. Also, if the detection device part from the infrared detector U21 to the second comparator U41 is replaced with one that continues to output the H signal while there are people around, the second timer circuit mark can be omitted and the This allows for a configuration in which the lights are turned on only for an arbitrary length of time when there are people present.

Also, if the timer section (8) is omitted, IJfftt will be eliminated when the lamp is turned on continuously after sunset, and the lamp (3) will frequently flash and return at night when there are people around. 91 This is not desirable because it may cause discomfort to passersby, and if a fluorescent lamp is used as the lamp (3), frequent flashing may shorten the life of the lamp.

(G) Effects of the Invention According to the present invention, the light source is turned on continuously for a predetermined period of time after sunset, and the presence of passersby is detected in the middle of the night and the light source is turned on each time. Is it possible to secure solar power while reducing consumption and reducing overall cost?
[You can obtain a lighting lamp with a pond.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram showing one embodiment of the present invention, Fig. 2 is a perspective view of the same external appearance, and Fig. 3 is a time chart showing the same operation. 2+... Secondary battery, (3
)...Lamp, (5)...Illuminance detection unit, (Grand...
Timer section, Ill... human body detection section, (17)... lighting control section. Applicant: Takuji Nishino, patent attorney representing Sanyo'IIi Ki Co., Ltd. (1 other person)

Claims (1)

[Claims] (1) A solar cell that generates power in response to incident light, a secondary battery that is charged by the output of the solar cell, a light source that is lit by the secondary battery, and an illuminance detection unit that detects brightness; a timer section that issues a control signal in accordance with a detection result of the illuminance detection section; a human body detection section that detects a human body and issues a control signal in accordance with the detection result and the detection result of the illuminance detection section; and the human body detection section. and a lighting control section that controls lighting of the light source based on a control signal from the timer section.