JPS6127097A - Photoelectric automatic flasher - 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 C. Technical Field of the Invention The present invention relates to a photoelectric automatic flashing device that can set the illuminance at which the light is turned off to be lower than the illuminance at which the light is turned on.

[Prior art]

Conventionally, in photoelectric automatic flashing devices, the illumination intensity when the lights are turned off is generally set to be higher than the illumination intensity when the lights are turned on. For this reason, unnecessary street lights may remain on for a long time even though it is bright enough in the morning, which is uneconomical. Therefore, there is a demand for a photoelectric automatic flashing device in which the illuminance when the lights are turned off is equal to or lower than the brightness when the lights are turned on. It has reached the point where

In order to solve this problem, a method has been proposed for a photoelectric automatic flashing device in which after a predetermined delay time has elapsed using a timer or the like after the evening lighting operation, the illuminance for turning off the light is reset to a lower illuminance than the illuminance for turning on. (Jitsukai 58-9)
8800).

However, with this method, changes in outside light vary depending on the conditions of the day, and if the lighting conditions for turning on/off and the installation location are assumed to be specific, it is necessary to set a long delay time, and the operation safety is further reduced. It is difficult to set a standard for how long the delay time should be in order to guarantee safety, and these design problems tend to make the device itself expensive. be.

[Purpose of the invention]

The present invention was made in order to eliminate the drawbacks of the conventional photoelectric flashing device described above, and it is possible to automatically switch the operating illuminance setting means according to the external light illuminance, and to reliably set the illuminance when the lights are turned off to be lower than the illuminance when the lights are turned on. It is an object of the present invention to provide a photoelectric automatic flashing device which has a delay characteristic for turning off the light and prevents frequent flashing operations.

[Summary of the invention]

The present invention provides operating illuminance setting means for high illuminance and low illuminance, sets the illumination setting for low illumination to be lower than the illuminance for turning on high illuminance, and the external light illuminance is lower than the illuminance for illumination for low illuminance. If the illuminance of external light has decreased, only the output of the operating illuminance setting means for low illuminance is enabled, and when the external light illuminance has risen above the set illuminance of turning off for high illuminance, only the output of the operating illuminance setting means for high illuminance is enabled. In this way, the illuminance for turning off is reliably lower than the illuminance for turning on to prevent unnecessary lighting in the morning, and a delay means that is effective only during the lighting operation is provided to prevent frequent blinking operations. .

[Embodiments of the invention]

Next, an embodiment of the photoelectric automatic blinking device according to the present invention will be described.

First, an outline of an operation program for turning on or off a lighting load using the photoelectric automatic flashing device of the present invention will be explained based on FIG.

■ Regarding the lighting program for lighting loads in the evening In the evening, the illuminance A −+ is set to 150Lu, for example.
x, lighting illuminance A At time T, the operating illuminance setting circuit A for high illuminance sets -2 to, for example, 80 Lux.

When the external light reaches the lighting illuminance A-2 (80 Lux), the lighting load is configured to immediately enter the lighting operation state with almost no delay time. This is based on the idea that when it gets dark, it is safer to turn on the lights immediately.

On the other hand, a certain delay time is provided until the light goes out. That is, when the outside light illuminance due to stray light becomes equal to or higher than the lights-off illuminance A-+ (150 Lux) at time T2, and this illuminance is detected continuously for a predetermined delay time T4 or more,
It is configured such that the light-off operation is performed for the first time at time T3. Therefore, it is possible to prevent the lighting load from repeatedly turning on and off in the evening, and even if the lights turn off, at time T4, the outside light is turned on again at the lighting illuminance A-
2 (80 Lux) or less, the lighting load is configured to immediately enter the lighting operation state.

In addition, in the photoelectric automatic flashing device according to the present invention, the off illuminance B −+ is, for example, 50 Lux, and the on illuminance B −2
The device is uniquely equipped with an operating illuminance setting circuit B for low illuminance, which is set to, for example, 20 Lux. However, this operating illuminance setting circuit B is configured such that it is switched over from the operating illuminance setting circuit A and does not operate effectively unless the external light below the lighting illuminance B- continues for a predetermined period of time. Therefore, the external light illuminance is the lighting illuminance A-z (80L
Even if the operating illuminance setting circuit B becomes lower than ux) and the operating illuminance setting circuit B detects the off illuminance B −+ (50L++ Since the setting circuit A is operating effectively, the lighting load maintains the lighting operation state.

■ About the lighting load lighting program at night When the external light illuminance further decreases and the illuminance of the operating illuminance setting circuit B's lighting illuminance B-2 (20LLIX) or lower is detected for a predetermined time T at time T, the operating illuminance is The setting circuit B is enabled for the first time, while the operating illuminance setting circuit A is disabled, resulting in a complete nighttime state, and the lighting load maintains the lighting operation.

During the lighting operation at night, the structure is designed to prevent malfunction by providing a certain delay time in response to stray light from car headlights, searchlights, etc. Even if the lamp receives stray light for a long period of time exceeding a predetermined delay time, the lamp is configured to return to lighting operation in the following manner. That is, (
b) Turn-off illuminance B-+ (50Lu
x) With the above, the operating illuminance setting circuit A turns off illuminance A I +
(150 Lux) If stray light with an illuminance lower than (150 Lux) is received continuously for more than a predetermined delay time Td, the lighting load enters a light-off operation at time T6, but the operating illuminance setting circuit does not switch, and the operating illuminance setting circuit B is still effective, stray light disappears, and at time T, the outside light illuminance is turned on again at the lighting illuminance B−z (
20 Lux), it is detected and the lighting load is immediately returned to the lighting state.

(I+) On the other hand, if stray light with an illuminance equal to or higher than the turn-off illuminance A-0° (150 Lux) of the operating illuminance setting circuit A is received continuously for longer than the predetermined delay time Ta, the circuit enters the turn-off operation at time T8. At the same time, the operating illuminance setting circuit is switched, and the operating illuminance setting circuit B is disabled and the operating illuminance setting circuit A is enabled.

Then, at time T, when the stray light disappears and the outside light illuminance reaches the lighting illuminance A-z (80 Lux), the lighting is immediately returned to the lighting state.

Furthermore, the outside light illuminance decreases, and the lighting illuminance B-z (20 Lux
) or less is detected for a predetermined delay time T6, the operating illuminance setting circuit is switched again at time T1°, the operating illuminance setting circuit B is enabled, and the lighting state of the lighting load is maintained.

■ About the lighting load turn-off program in the morning As described above, the operating illuminance setting circuit B operates effectively from night to early morning, and in the morning, the external light illuminance is set to 50 Lux over a predetermined delay time. The above is reached at time T1. When detected, the lighting load can be reliably turned off.

Next, the external light reaches the operating illuminance setting circuit B's turn-off illuminance B-'+
Even if the illuminance becomes even brighter than '(50 Lux) and the illuminance reaches the lighting illuminance A-2 (80 Lux) of the operating illuminance setting circuit A, the operating illuminance setting circuit does not switch and the operating illuminance setting circuit B does not operate effectively. Therefore, the light-off operation is maintained, and the external light illuminance further increases to reach the light-off illuminance A-+ (150 Lux) of the operating illuminance setting circuit A at time T1□.
When it is completely bright in the morning, the operating illuminance setting circuit is switched, operating illuminance setting circuit A is enabled, and operating illuminance setting circuit B is disabled. It is designed to return to the initial state similar to the lighting program.

The above operation program repeatedly turns on and off the lighting load from evening to morning.As can be seen from this program, in the present invention, the operating illuminance setting circuit is automatically turned on and off at night according to the outside light illuminance. Therefore, the illuminance when the lights are turned off can be easily and reliably set to be lower than the illuminance when the lights are turned on.

Next, the configuration of a photoelectric automatic blinking device for implementing the above operating program will be described. Figure 2 shows
1 is a block diagram illustrating an example thereof.

In FIG. 2, 1 is a commercial frequency AC power source, and 2 is a constant voltage circuit connected to the AC power source, which serves as a power source for the control circuit. 3 is an operating illuminance setting circuit A for high illuminance (unlit illuminance and on illuminance) and an operating illuminance setting circuit B for low illuminance.
The illuminance detection circuit 3 includes a delay timer circuit 3-2, an insertion/removal switching circuit 3-3 for enabling or disabling the operation of the delay timer circuit, and a voltage detection circuit 3-3 for setting lighting illuminance for high and low illuminance. 4. Operating illuminance ratio for high illuminance (unlit illuminance A-1/
Lighting/lighting-2) Setting circuit 3-5, operating illuminance ratio for low illuminance (unlit illuminance B-1/lighting illuminance B-2) setting circuit 3-6
It consists of

4 is a logic judgment circuit, - number circuit 4 - clock pulse generation circuit 4. ．． 2. Consisting of a D-type flip-flop circuit 4-3 and an OR circuit 4-4, the output of the operating illuminance ratio setting circuit 3-9 for high illuminance is connected to the operating illuminance ratio setting circuit 3-9 for low illuminance.
The output of the operating illuminance ratio setting circuit 3-6 for low illuminance is valid up to the detection of the external light illuminance corresponding to the lighting illuminance B-z of 6.
Turn-off illuminance A-1 of operating illuminance ratio setting circuit 3-s for high illuminance
The lighting operation output is enabled until the detection of the external light illuminance corresponding to
-+ is configured to generate a light-off operation output.

5 turns on/off the lighting load 6 based on the output of the logic circuit 4.
This is an output drive circuit for turning off the light.

Next, a specific example of the circuit configuration of the photoelectric automatic flashing device shown in the block diagram of FIG. 2 will be explained based on FIG. 3.

A surge absorber SA for absorbing surge voltage is connected in parallel to the commercial frequency (50/60 Hz) AC power supply 1. Constant voltage circuit 2 forming a DC voltage source for the control circuit
are a resistor R1, 3 and a diode D1 connected in series to one line L of the AC power supply 1, one diode D2-1 in the rectifier bridge circuit Br connected to the other line 12 of the AC power supply 1, The resistor R1+ and the diode D1
It also includes a Zener diode ZD and a smoothing capacitor C1, which are connected in parallel to the AC power supply 1 via the diode D2-1. In addition, P+
+P0 is an output terminal of the constant voltage circuit 2.

The illuminance detection circuits 3-1 of the operating illuminance (unlit illuminance/on illuminance) setting circuit 3 are connected in series with each other, and are connected to a constant voltage source terminal P.
It is composed of a sensitivity adjustment resistor R1 and a photoconductive cell CdS connected in parallel to + and Po.

The delay timer circuit 3-2 includes a resistor Rz connected to a connection point between the resistor R1 of the illuminance detection circuit 3-1 and the photoconductive cell CdS, and a capacitor connected in parallel to the resistor R2 and the photoconductive cell CdS. It is composed of C2. An insertion/removal switching circuit 3 for enabling or disabling the operation of the delay timer circuit 3-2. is a photocoupler PC consisting of a light emitting diode LED and a phototransistor TP, and a resistor R
x, Ra, and a series connection circuit of the light emitting diode LED of the photocoupler PC and the resistor R4 is connected to the constant voltage source terminal Pl and the output C of the logic circuit 4,
Further, a series connection circuit of the resistor R3 and the phototransistor TP of the photocoupler PC is connected in parallel to the resistor R2 of the delay timer circuit 3-2.

The voltage detection circuit 3- for setting the lighting illuminance A-2, B-z for high illuminance and low illuminance includes a field effect transistor FET and a resistor R5 connected to the source S of the FET.
It is composed of a series circuit of R6, and the drain D of the field effect transistor FET is connected to the terminal P1 of the constant voltage source.

The operating illuminance ratio (unlit illuminance/lit illuminance) setting circuit 3-s for high illuminance includes two inverters INVI connected in series,
A Schmitt trigger circuit formed by INV2, a resistor R6 connected in parallel to the inverters INV+ and INVz, and a resistor R1 connected in series to these series-parallel circuits, and two inverters IN of the Schmitt trigger circuit.
It consists of a malfunction prevention capacitor C3 connected between V+ and INVz and between the constant voltage source terminal P0.

The input signal is supplied from the connection point between the source S of the field effect transistor PET of the voltage detection circuit 3-4 and the resistor R6, and its output A is connected to one of the input terminals of the logic circuit 4.

The operating illuminance ratio setting circuit 3-6 for low illuminance (unlit illuminance/lit illuminance) is also composed of a Schmitt trigger circuit consisting of resistors R, , R, ◎ and two inverters INVa and INV4, and a malfunction prevention capacitor C4. The input signal is connected to the resistor R5 and the resistor R in the voltage detection circuit 3-4.
6, and the output B"4 is connected to the other input terminal of the logic circuit 4.

The capacitors C'r and Ca for preventing open operation in the operating illuminance ratio setting circuits 3-s and 3-6 are intended to stabilize the input/output level of the IC that constitutes the inverter, thereby stabilizing the operation. It is.

The logic judgment circuit 4 receives the outputs A and B of the operating illuminance setting circuit 3 as input signals and generates a final output C that turns on or off the lighting load 6 for each external light illuminance condition. It is configured as follows.

The matching circuit is the operating illuminance ratio setting circuit 3-5 for high illuminance.
It consists of an exclusive OR circuit [ioR] which takes as inputs the output A of It is connected to the preset terminal PR of the type flip-flop 4-3. Black/7k pulse generation circuit 4-
2, one input terminal 11 is connected to the output A of the high illuminance operating illuminance ratio setting circuit 3-5, and the other input terminal 2 is an integral circuit consisting of a resistor R11 and a capacitor C9 connected to the output A. Exclusive OR circuit EOlh connected to the output end of the circuit
and a delay circuit consisting of a resistor R+z and a capacitor C6 connected to the output terminal O3 of the exclusive OR circuit EOR2, and the output terminal 0. is connected to the clock terminal cp of the D-type flimp front panel 4- through the connection point between the resistor R+□ of the delay circuit and the capacitor C6, and the resistor R constituting the delay circuit
The other end of I□ is connected to constant voltage source terminal P1, and capacitors C5 and C
The other ends of the terminals b are respectively connected to the constant voltage source terminal P0.

The D-type flip-flop 4-8 has a clear reset terminal C.
One negative terminal P0 of a constant voltage source is connected to the L and data terminals, so that the logic value is always L, and the output direction is connected to an OR circuit, which is connected to one input terminal a of the constant voltage source.

The output B of the operating illuminance setting circuit 3 is connected to the other input of the OR circuit 4-4.
The output C is the resistance R of the delay timer insertion/removal switching circuit 3-3.
4 and the input end of the lighting load turning on/off drive circuit 5, respectively. Note that S is an output terminal of the OR circuit 4.

The lighting load turning on/off drive circuit FIlr5 is a diode Di-1+Dz-+t+Di-a r
Consisting of Dz-a, 'diode bridge + Dz-
One line 7!2 of the AC power source 1 is connected to the connection point of 3, and the connection point of the diodes D2 to 1°Dz-2 is connected to one terminal P of the constant voltage circuit 2.

a diode bridge B connected to the logic circuit 4;
A series resistor R14 for adjusting the gate voltage of the thyristor Th is connected between the output terminal S of the thyristor Th and the connection point of the diodes Dz-+ and Dz-□ of the diode bridge B.
+ RI5, and the cathode is connected to the connection point of the diode D2-1, Dt-z of the diode bridge B1, and the diode D2-3 . A thyristor T6 having its anode connected to the connection point of D2-4 and its gate connected to the connection point of the resistors R14 and R3, and one terminal of the lighting load 6 and one line 7!2 of the electric current tJ1 is connected. Connect the main electrode,
A triac slave for lighting load turning on/off whose gate is connected to the connection point of the diodes D2-21D21, a gate resistor R16 connected between the gate and one main electrode of the tria TR, and a main electrode of the triac TRO. Resistor R17 for preventing triac malfunction connected in parallel with
and a series circuit of capacitor C7.

Next, one example of a specific circuit configuration of the photoelectric automatic flashing device configured as described above will be described.

First, the setting of the resistance value of each resistor in the operating illuminance setting circuit 3 will be explained.

The illuminance detection circuit 3-I utilizes the fact that the resistance value of the photoconductive cell CdS becomes lower (higher) when the outside light becomes brighter (darker). Voltage (2) between the source constant voltage source terminal 20 of the field effect transistor FET of the voltage detection circuit 3-4 based on the resistance value of the photoconductive cell CdS when external light of A-2 (for example, 80 Lux) is received. becomes the input voltage of the operating illuminance ratio setting circuit 3-6 for high illuminance. Then, the resistance value of the sensitivity adjustment resistor R is set so that the input voltage exceeds the threshold voltage of the Schmitt trigger circuit of the operating illuminance ratio setting circuit 3-5, and the output A becomes the logical value . be done.

Since the output C (logical value) of the logic circuit 4 is L during the light-off operation, the photocoupler PC of the switching circuit 3-3 of the delay timer circuit 3-2 is turned ON. At this time, the resistance value of the resistor R3 is set to be extremely smaller than that of the resistor R2, and the delay timer circuit 3-2 is disabled so that it does not operate. On the other hand, during the lighting operation, the output C of the logic circuit 4 becomes H and the photocoupler PC is turned off, so that the delay timer circuit 3-2 effectively operates.

Furthermore, the voltage between the source S constant voltage source terminal 20 of the field effect transistor FET of the voltage detection circuit 3-4 when receiving external light with an illuminance of unlit illuminance A-+ (150 Lu)
In order to make the output A of the Schmitt trigger circuit of the operating illumination ratio setting circuit 3-9 equal to the logical value, resistor R7 and resistor R are connected.
8 is set.

In addition, when the photoconductive cell CdS receives external light whose illuminance is lighting illuminance B-2 (20LIIX), the voltage detection circuit 3-
The voltage V between the source S constant voltage source terminal 20 of the field effect transistor FET 4 is divided by the resistor R9 and the resistor R6, and the voltage across the resistor Rh 8 is the operating illuminance ratio setting for low illuminance. The resistor R5 and the resistor R6 are set so that the input voltage becomes the input voltage of the Schmitt trigger circuit of the circuit 3-6, and the output B becomes the logical value H at the input voltage V.

Furthermore, the photoconductive cell CdS is turned off at illuminance B-+ (50LU
Source S constant voltage source terminal 2 of the field effect transistor FET of the voltage detection circuit 3-4 when receiving external light X)
The voltage vA between 8 and 8 is divided by the resistor R6 and the resistor R6, and the voltage across the resistor R5 is determined by the operating illuminance ratio setting circuit 3-
The resistors R7 and R8° are set so that the output B of the Schmitt trigger circuit No. 6 has a logical value.

Next, in the photoelectric automatic flashing device in which the resistance values of the respective resistors in the operating illuminance setting circuit 3 are set in this manner, the operation when the external light illuminance changes will be described.

First, each output A of the operating illuminance ratio setting circuits 3-s and 3-b,
B will be explained. Outside light illuminance is lighting illuminance A-2 (80
Lux), the output A of the operating illuminance ratio setting circuit 3-6 for high illuminance is set to H.Then, the external light illuminance rises and the illuminance is set to a predetermined illuminance equal to or higher than the lights-out illuminance A-+ (150 Lux). When the detection is continued for the delay time ("rd), the output A becomes a logical value.

The outside light decreases from the lighting illuminance A-z (80Lux),
When illuminance below lighting illuminance B-2 (20 Lux) is detected continuously for a predetermined delay time, the operating illuminance ratio setting circuit 3-
The output B of 6 becomes a logical value H, and then the light-off illuminance B-+
When an illuminance of (50 Luχ) or more is detected continuously for a predetermined delay time, the output B of the operating illuminance ratio setting circuit 3-6 becomes a logical value.

Table 1 shows data of operation examples for external light of various illuminances. However, this is the case where the constant voltage power supply is 6■.

Table 1 Next, the operation of the logic circuit 4 in response to the outputs A and B of the operating illuminance setting circuit 3 will be explained.

-Several circuit 4-+ outputs H only when both inputs are H or L, and is composed of an exclusive OR circuit EOR+ and impark INVs connected to its output. , Therefore, when the outputs A and B of the operating illuminance setting circuit 3 serving as its input are both H or L, the output of the minus number circuit 4-1 becomes H, and the output of the minus number circuit 4-I is connected. The present terminal PR of the D-type flip-flop 4-3 also becomes H. Therefore, the output of the flip-flop 4-3 and one input terminal a of the OR circuit 4-4 are required.

In order for the clock pulse generation circuit 4-2 to operate effectively,
- the output of the number circuit 4-I, i.e. the D-type flip-flop 4. It is necessary that the present terminal PR of the terminal becomes L.

That is, the clock pulse generation circuit 4. When the output A of the operating illuminance setting circuit 3 changes from L to H, the clock pulse from Based on the state in which the output A of the operating illuminance setting circuit 3 changes from L to H and the output B maintains L, the present terminal PR of the D-type flip-flop 4-3 becomes L, and then the resistor R1 Since it is delayed by a delay circuit consisting of □ and a capacitor C6 and is transmitted to the clock terminal CP, the output d of the D-type flip-flop 4-3 is reliably transmitted.
, that is, one input a of the OR circuit 4-4 is changed from L to H.
It can be done.

In the OR circuit 4-1, when either input a or input A is H, the output C becomes H and becomes a lighting output. The lighting output of the logic circuit 4 turns on the thyristor T of the lighting load turning on/off drive circuit 5, which also turns on the triac TR, causing the lighting load 6 to be in the lighting output state. Further, the photocoupler PC of the delay timer circuit switching circuit 3-3 is turned off by the lighting output of the logic circuit 4, and the delay timer circuit 3-2 is effectively operated, so that the next light-off operation has a predetermined delay time. do.

Further, when both the input a and the input of the OR circuit 4-4 are connected, the output C becomes L and becomes a light-off output. This light-off output turns off the thyristor T and triac TR of the lighting load on/off drive circuit 5 to turn off the lighting load 6, and at the same time, the delay timer circuit 3-2
to be inactive and ready for the next immediate lighting.

Table 2 shows each input/output logic value of the logic determination circuit 4 for external light (IL) of various illuminances.

However, illuminance A-+ when turned off: 150Lux, illuminance A when turned on
-z: 80Lux, off illuminance B-+: 50Lux
, lighting illuminance B-z: 20ux.

Note that PR and CP in the table indicate inputs to the clock terminal and preset terminal of the D-type flip-flop.

Table 2 Next, a specific blinking operation program for the lighting load based on the logical values shown in Table 2 above will be explained.

■ Evening lighting load lighting program Ambient light illuminance is (1) in Table 2. [From state 21 (3)
When the state becomes (50<IL≦80), the logic circuit 4
The output C becomes H and the lighting operation starts. Also, the outside light illuminance changes from the state (3) to the state (1) JLt (IL≧15
0) and maintains that state for a certain delay time,
The output C of the logic circuit 4 becomes L, and the light goes out. However, after this light-off operation, when the external light illuminance returns to state (3) again, the output C is L, so the delay timer circuit 3-2 does not operate, and the light-on operation immediately begins. Even if the external light illuminance decreases and becomes the state (4) (20<IL≦50), the output C remains H and the lighting operation is maintained, and the operating illuminance setting circuit A for high illuminance is activated. Works effectively.

■Lighting load lighting program at night When it is completely night and the outside light illuminance further decreases to state (5) (0≦IL≦20), the output B of the operating illuminance setting circuit 3 becomes H and the human power a is However, the input signal becomes H and the output C becomes H, the lighting operation is maintained and the operating illuminance setting circuit B for low illuminance operates effectively.

Due to stray light, the external light illuminance is (7) or (8) (50
≦IL<80 or 80≦IL<150) continues for a predetermined delay time, input a remains at L, and input a remains at L.
Therefore, the lights turn off, but when the stray light disappears and the outside light illuminance returns to state (5) (0≦IL≦20),
The output B becomes H and the lighting operation starts immediately.

Furthermore, due to stray light, the external light illuminance is fil or the state (9) (
When IL≧150) continues for a predetermined delay time, both outputs A and B become L, and inputs a and b also become both L, so the light goes out and the operating illuminance setting circuit A becomes effective.
Stray light disappears, and the outside light illuminance is again at (3) (50<
When I L≦80), the input a becomes H and the lighting starts immediately, and the external light illuminance goes through the state of (4) and then becomes (5).
) (0≦IL≦20), the operating illuminance setting circuit B becomes effective again, and in this state, the lighting operation is maintained at night.

■ Lighting load turn-off program in the morning When the external light illuminance passes through state (6) (20<IL<50) and continues in state (7) (50≦IL<80) for a predetermined delay time, a clock pulse is generated. No, the input a remains at L, but since the input a becomes L, the output C becomes L and the light goes out. Therefore, the light can be reliably turned off at an outside light illuminance lower than the lighting illuminance in the evening.

Furthermore, the external light illuminance is (8) (80≦IL<150)
When the state jf3i (IL≧150) in (9) is reached, the input a remains at L and the output A becomes L, and the operating illuminance setting circuit A becomes effective, so that the external light illuminance becomes (1).
and returns to the initial state of the lighting load lighting program in the evening.

In the above specific circuit configuration example, a cadmium sulfide cell is used as a photoconductive cell in the illuminance detection circuit 3-1 of the operating illuminance setting circuit 3, but other light receiving elements such as a phototransistor may be used. I can do it. Note that for the field effect transistor PUT of the voltage detection circuit 3-4 of the setting circuit 3, a transistor with high hFE may be used instead of the FET. However, since the total impedance of the illuminance detection circuit, delay timer circuit, and operating illuminance ratio setting circuit is small, adjustment is extremely difficult when using transistors with small input impedance.
Therefore, it is most stable and effective to use a field effect transistor.

Also, an exclusive OR circuit FOR in the logic circuit 4.

is a circuit constructed by combining a NAND circuit, an OR circuit, and an AND circuit, as shown in FIG. 4 or FB+,
Alternatively, the same operation can be performed by a circuit configured by combining four NAND circuits. Similarly, the exclusive OR circuit EOR of the clock pulse generating circuit 4-2 has one input terminal 1. A NOR circuit in which the inverter INV is connected to the inverter INV or an AND circuit in which the inverter INV is connected to the other input terminal (2) can be used instead. Further, the OR circuit 4-4 of the logic circuit 4 can be replaced with an exclusive OR circuit, and the same lighting/extinguishing operation can be performed.

(Effects of the Invention) As described above in detail based on the embodiments, according to the present invention, each output of the illuminance setting means for high illuminance and low illuminance operation (turning on/off) is automatically controlled according to the external light illuminance. Since the illuminance is switched cyclically, it is possible to reliably set the illuminance when the lights are turned off to be lower than the illuminance when the lights are on, regardless of changes in external conditions.

In addition, a delay means is connected to the outside light illuminance detection means, and the delay means is configured to operate effectively during the lighting load lighting operation, so that the lighting operation is performed immediately when the lighting operation starts, and the delay characteristic is applied when the lighting operation starts. This makes it possible to prevent frequent repetition of blinking operations while maintaining instantaneous lighting operations.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a program for turning on and off a lighting load using a photoelectric automatic flashing device according to the present invention, and FIG.
FIG. 3 is a block configuration diagram of an embodiment of the present invention, and FIG. 4 is a diagram showing an example of the circuit configuration of each block shown in FIG.
(B) is the exclusive OR circuit EOR+ shown in FIG.
FIGS. 5(8) and 5(8) are diagrams showing other equivalent circuits of the exclusive OR circuit EORz shown in FIG. 3. In the figure, 1 is an AC power supply, 2 is a constant voltage circuit, 3 is an operating illuminance setting circuit, 3-1 is an illuminance detection circuit, 3-2 is a delay timer circuit, 3-3 is a delay timer switching circuit, and 3-4 is a Voltage detection circuit for lighting illuminance setting, 3-3 is an operating illuminance ratio setting circuit for high illuminance, 3-h is an operating illuminance ratio setting circuit for low illuminance, 4 is a logic judgment circuit, 4-1 is a coincidence circuit, 4 -2 is a clock pulse generation circuit, 4-3 is a D-type flip-flop, and 4-4 is an OR circuit. Patent applicant Kenji Mogami, patent attorney representing Iwasaki Electric Co., Ltd. 2 ° 0 0 Light 3 Diagram A Procedural Amendment June 4, 1985 Manabu Shiga, Commissioner of the Patent Office 1, Indication of the case 1983 Patent Application No. 145273 2, Name of the invention Photoelectric automatic blinking device 3 , Relationship with the case of the person making the amendment Patent Applicant Address: 3-12-4 Shiba, Minato-ku, Tokyo Representative: Mitsuo Iwasaki 4, Agent Address: 1103 Nisotei Mansion, 1-22-12 Shinkawa, Chuo-ku, Tokyo Telephone number (03) 551-3264 6. Number of inventions increased by amendment None 7. Subject of amendment Detailed explanation of the invention in the specification column 8. Contents of the amendment (1) Line 5 of page 12 of the specification "DC voltage source" is corrected as "DC voltage power source j." Line 6, page 16, line 9. Correct with power supply J. (3) Page 14, line 10, page 14, line 18, line 15
"Input end" on page 14, line 16 on page 15, line 11 on page 16, and line 17 on page 16 is corrected to "input terminal 4." (4) Lines 17-18 on page 15, line 15 page 19 line,
Correct "output end" in line 1 of page 16 to "output terminal j." (5) Correct "input terminal a" on page 22, line 12 to "input a". that's all

Claims (2)

[Claims] (1) An illuminance detection means for detecting changes in the illuminance of external light, and outputs an output signal when the illuminance when the lights are turned off is set higher than the illuminance when the lights are turned on, and the illuminance detected by the illuminance detection means becomes less than the set illuminance when the lights are turned on. a lighting/lighting-out illuminance setting means for high illuminance; a turning-off illuminance is set higher than the lighting illuminance and lower than the lighting illuminance of the turning-on/lighting-off illuminance setting means for high illuminance;
a lighting/turning-off illuminance setting means for low illuminance that outputs an output signal when the illuminance detected by the illuminance detection means is below a set lighting illuminance; and a turning-on/turn-off illuminance for low illuminance when the illuminance detected by the illuminance detection means is lower than a set lighting illuminance. When the illuminance is lower than the lighting intensity of the illuminance setting means, the illumination setting means for high illuminance is disabled and only the output signal of the illuminance setting means for low illumination is turned on and off, and the illuminance setting means for high illuminance is turned on and off. logical determination means for disabling the on/off illuminance setting means for low illumination and validating only the output signal of the on/off illuminance setting means for high illuminance when the illuminance increases above the off illuminance of the illuminance setting means; 1. A photoelectric automatic flashing device comprising: lighting load flashing drive means controlled by the output of the logical determination means. (2) A delay means is connected to the external light illuminance detection means, and the delay means operates effectively when the lighting load is turned on, and becomes ineffective when the lighting load is turned off, depending on the output signal of the logic judgment means. Claim 1, characterized in that the switching control is performed so that the lighting operation is performed immediately at the start of the lighting operation, and the extinguishing operation is performed after a predetermined delay time has elapsed at the start of the extinguishing operation. The photoelectric automatic flashing device described.