JPS6074294A - Firing device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Technical field of invention The present invention relates to a lighting device for a street light or the like.

Technical Background of the Invention and Problems Therein In recent years, in order to effectively utilize sunlight, lighting devices using solar cells as a power source have been developed. Figure 1 schematically shows an example of this. During the day, the storage battery (2) is charged via the backflow prevention diode D using the solar battery txt as a power source, and the solar battery (moon's voltage) is Monitor it with the sunset detection circuit (3), and if it reaches a "dark level" below a certain voltage, consider it to be sunset and operate the 8-hour timer circuit (4).l) L/- contact (
5) is closed, and a light source load (6) such as for fluorescent light is turned on for a certain period of time. In other words, without using a special sensor for sunset detection, it is possible to ) 'Fti, which uses the pond (1) itself. In addition, in order to prevent the storage battery (2) from being overcharged, the pressure at both ends of the storage battery (2) is monitored by an overcharge prevention circuit (7), and when a certain itt pressure is reached, this overcharge protection IF circuit ( The output of 7) gate triggers the relay register (8), and
This is to short-circuit the K pond txt. Historically, storage batteries (2
)'if.

The voltage is monitored by an overdischarge prevention circuit (9), and when the voltage drops to a certain level, the V-contact (5) is connected to IJ11.
It is set to release.

However, in the case of such a conventional method, the overcharge prevention circuit (7) operates during 1" and the sirinuta (8) is turned on.
Then, the state becomes the same as the sunset state, and the H sunset detection circuit t3
1 "Car Dark Novel", the timer circuit (4) is operated to turn on the load (6) for a certain period of time even though it is daytime. Then, after the actual sunset, when the short circuit current of the solar cell tl+ becomes less than the holding current of Cyrisk (8),
The thyristor (8) is turned off, but if the open circuit voltage of the solar cell (1) at this time is the "dark level" it of the sunset detection circuit ((3)), the timer circuit (4) is not reset. Therefore, for example, lights are turned on at 2:00 pm and turned off at 0:00 at night, so that fr and C do not fully play their role as must-see street illusions.

Purpose of the Invention The present invention was born from this point, and uses the solar cell itself to detect sunset, eliminating the need for a special sensor, and preventing overcharging of the storage battery. An object of the present invention is to obtain a lighting device that can ensure lighting at night.

SUMMARY OF THE INVENTION The present invention provides a sunset detection circuit comprising: 1. I L/-Contact/Sun'
Sunset detection is performed using the solar cell itself by detecting the blood pressure at both ends of the thick + slt battery between the batteries, but it is not affected by the opening and closing of the relay contact based on the overcharge prevention circuit. The system is designed to ensure that the main source is turned on at night, even though sunset detection is not performed at all.

Embodiment of the Invention An embodiment of the present invention will be described with reference to FIGS. 2 and 3. FIG. First, Figure 2 shows the outline, and instead of the cyrisk (8), there is a relay contact U that is opened and closed by the output of the overcharge prevention circuit (7) between the solar wheel Mtt+ and the storage battery (2). ()), and 3) is installed in the sunset detection circuit between the solar cell (II and the relay contact (IJ1).
It is designed to detect the output voltage at both ends of the 1Σ pond (1).

Fig. 3 shows more concretely, ``First, the sunset detection circuit (3) divides the L voltage output from both ends of the solar cell il+ through the variable resistor VR, and calculates the reference voltage. 'Voltage V
It is composed of a comparator U that compares it with ref+ and generates an output when the voltage drops to the reference voltage Vrefl. The output of this comparator Uυ is output by turning off the timer circuit u for 10 minutes.
It is input to the timer circuit (4). This 10-minute timer circuit u21 is for preventing the lighting operation when it becomes temporarily dark. And the output of the 8-hour timer circuit (4) is monostable multipipe lake a3
The output of the monostable multi-pipe lake u31, which is input to +ua and operates manually on the rising edge, closes the IJ V- contact (5) via - (150) and connects it to the falling input, J,,!17. Operating monostable multi-vib 1-note round output latching relay (15R)
'i is set to open the link contact 09.

In addition, the overcharge prevention circuit (7) divides the voltage across the storage battery a (21) through a variable resistor VR, and generates a reference voltage Vr.
When the reference voltage Vref2 is compared with af2, the comparator U generates an output of L novel when it becomes high. The output of +7] is input to the monostable multi-pipe rake, and the output of the monostable multi-pipe rake operated by this VHP valves the latching relay (19R) to open the relay contact uOI. The output of the 1o minute timer circuit U21 is also input to the monostable multivibrator 4, which is activated by this falling input.
Nosenno () 191 No AI Ill Koyama Izuru by +-h
2. Relay contact Q(1) is set to be closed by valving V-(198)'. Specifically, for overdischarge prevention 1 (j1jt8 +9), the voltage at both ends of the storage battery (2) is inputted by dividing the voltage through the IU variable resistor VR, and compared with the reference voltage Vref3, and the voltage decreases at the reference voltage Vref3'l: The comparator (21) produces an output when It has been entered.

The output t of this flip-flop is input to an 8-hour timer circuit (4).

In such a configuration, the initial state of death during H is set as follows. Accumulation'f (L pond (
2) The voltage is lower than the reference voltage Vref, which is the reference '11.
．． Higher than IE Vr e +3. 1.Storage battery (
2) is in normal condition. Therefore, the flip-flop (
22) The S and R input signals are both LL', but an initialization circuit (not shown) sets this flip-flop (2 is in the set state, and the Q output 1-
j H Level Terra Ru. Such an initialization circuit is based on the 81W1 stage, which is known as a power-on reset circuit, in which the latching relay u9 is in the reset state with the relay contact (5) open, and the latching relay (19 is in the set state with the relay contact t1. Assume that oI is closed. In this case, there is no need to provide a special initializing means, and the normal state can be set after the - period operation is completed.

At this time, the output of the comparator (3) is at the L level because it is in the middle of 1. Therefore, the 8-hour timer circuit (4) does not start operation.
), when the input is 1 level, the output starts operating until it reaches L/bell. When the human power changes to L level, the output immediately changes to HL/bell, and after 8 hours, the output changes to L level. This is because it is configured as follows.

Therefore, when the output voltage of the solar battery (1) becomes low F due to sunset and the output of the comparator (3) changes to HV level, the output of the 10 minute timer circuit U becomes H level 10 minutes later. The output of the NAND gate (251 becomes LL/bell. As a result, the 8-hour timer circuit (4) starts full operation. At this time, the output of the 8-hour timer circuit I\5 (4) changes from L level to ■ ( level, so its rise υ causes a monostable multivibration node (13)!1I
1 to make IJ, therefore, latching relay tl! It's set coil (15) is energized, so the V-contact (5)
1 is closed, power is supplied to the inverter, and the epidemic lamps 1 and 141 are lit. Then, when 8 hours have elapsed, the output of the 8-hour timer circuit (4) changes from H level to L level, so the monostable multivibrator V141 operates at the fall of the output, and the latching relay is activated. (+
51 glue set coil relay 5R) is WJ-magnetized, the relay contact (5) opens and the fluorescent rung 124+ goes out.

Then, when the sun rises, the output voltage of the 1-channel il+ increases, so the output voltage of the comparison 5G3+ changes to the 1-iL level, and 10 minutes later, the 10-minute timer circuit (the output of 1 is also low). level, so the output of NAHI) t2~ changes to FIL/Bell.However, this 4-8 hour timer circuit!41's internal counter is only cleared, and the output changes to -f-if of L level. , the state of latching relay u9 does not change and the ring contact (5) remains open.Meanwhile, the output of the 10 minute timer circuit (1) is also input to the monostable multivibrator (20). Therefore, this monostable multivibrator 4 operates, and the latching relay (circular set coil (1qs) is energized, but since the relay contact (10) is assumed to be in the closed state, in the end, the latching relay 〇's The state does not change.Tsu reed, phosphorus contact IJO) u will always be closed at sunrise.

By the way, the overcharge prevention circuit (7) is m! I will explain the case of creating an image. Here, overcrowding occurs only during the day.
? ! Since there is no such thing, the explanation will be continued from the above-mentioned operation.

That is, due to overcharging, the voltage of the storage battery (2) decreases to the base voltage Vr.
When the value exceeds ef, the output of the comparator t1.61 changes to L level, and therefore the output of inverter a7) changes to H level. This rise causes the monostable multivib sorter (1
81 operates, and the latching relay eel reset coil (
19R) is excited, the relay contact 110+ is opened, and the solar cell (11) and the acid storage tank t21 are disconnected.

However, from l, the sunset detection circuit (3) is connected to IJ V-contact U.
Since the output voltage of the solar battery (1) during the day is detected regardless of whether the battery is open or closed, no change occurs.

Here, when the relay contact (lO) is opened,
i1□tllll (The output voltage of 11 indicates the open screw pressure,
Reference voltage Vref.

It's no wonder that it's higher than that. The output of the input terminal (In) is connected to the set input S of the flip-flop t221, and the set input is at H level and input 2.
However, since the free lug float (221) is already set, no change will occur.
Since the light 5 of the storage battery (2) is cut off by opening the battery (2), the output voltage of the storage battery (2) gradually decreases to I.
Eventually the reference voltage Vref2 or lower, but the relay contact +
1 on Jllll, remains open, flip-flop (2
There are even reeds in seven pieces. Therefore, a series of operations at sunset on the 1st can be performed by creating an overcharge prevention circuit (7) (fiJ
It is performed without being influenced by the lotus, and the release of the lotus is performed.

Then, at sunrise, as described above, L/-j〆point (1(l) is closed, preparing for the day's charging, and everything returns to its initial state.

Furthermore, the operation of the overdischarge prevention circuit (9) will be explained below. Due to overdischarge, the voltage of the storage battery (2) drops to the reference voltage Vrθf
When it falls below 3, the output of the comparator (9) changes to H level, so the Noritub frog C21 is reset and its output Q becomes L level. Therefore, the output of the NAND gate (25+) is always at L level.
lI/1 operation occurs when there are many Yang Kai, night fluorescent rung (2 power is on, that is, 8 hour timer circuit 1
4) is currently in operation. Therefore, depending on the L level change of the NAND gate output, the 8-hour timer circuit (4)
Since the output immediately changes from HV bell to LL/bell, the monostable multivibrator (141) operates and the reset coil (15R) of the latching ring (15) 'i
As it is energized, the two V-contacts are opened and the fluorescent light is emitted.
24) will be turned off and the release turtle will be stopped. When the flip-frog (221) is reset, the 8-hour timer circuit (4) does not operate, and only the solar battery is charged. Eventually, the storage battery (2) is sufficiently photoelectrically charged and becomes overcharged. When the flip-flop I2 is set by the operation of the prevention circuit (7), the circuit returns to its initial state.

As described above, according to this embodiment, the solar cell 111 itself is used to detect sunset, and the overcharge of the power storage 11 (old 2) is prevented under the action of the overcharge prevention circuit (7). However, the detection of the output voltage at both ends of the solar cell fi+ is overcharged 111,
Since this is done regardless of the operation of the prevention circuit (7), it is possible to ensure that the fluorescent lamp circle is turned on at night.

Effects of the Invention Since the present invention is configured as described above, it has the effect of eliminating the need for a separate sensor for each time of the sun setting detection using the entire solar cell itself, and preventing overcharging of the storage IK battery. It is possible to completely turn on the lights at night while maintaining the same.

[Brief explanation of drawings]

Is Figure 1 a conventional example? FIG. 2 is a block diagram showing one embodiment of the present invention, and FIG. 3 is a block diagram showing a more specific embodiment. DESCRIPTION OF SYMBOLS 1...Solar cell, 2...Storage 'Kameike', 3...H submersion detection circuit, 4...Timer circuit, 6...Light source, 7...1
(Charge prevention circuit, 10/Relay contact

Claims (1)

[Claims] A storage battery that is charged using a solar cell as a power source, an overcharge prevention circuit that is connected in parallel to the storage battery to prevent overcharging, and an output of the overcharge prevention circuit that is connected in series between the solar cell and the storage battery. A sunset detection circuit that detects sunset by detecting the output voltage at both ends of this solar cell between the L/- contact, which is normally opened, and the relay contact and the solar cell, and the output of this sunset detection circuit. A lighting device characterized by being provided with a timer circuit for lighting a source for a certain period of time.