JPH03257792A - Illumination control device - Google Patents

Abstract

PURPOSE:To continue illumination control without a further operation of a switch after an indoor switch operation to turn off a light by closing an illumination circuit when illuminance becomes equal to or lower than a specified value, and opening the illumination circuit by an instantaneous cutoff of a power source in an illuminance state lower than the specified value. CONSTITUTION:A period from an instantaneous cutoff of a power source to generation of a detection signal in an illuminance detecting means, during generation of the detection signal in the illuminance detecting means consisting of a combination of an illuminance sensor 40 and a comparator 41, is detected by a period detecting means (logic circuit) comprising a combination of a D-type flip-flop 50 and an AND gate 51, and for that period an illumination lamp is controlled to be in an off state. Accordingly, in the case of going to bed and the like an instantaneous operation of on-off-on of an indoor switch 2 turns off the illumination lamp and in the morning an increase of an outside light reverses an output of a comparator 41 to a low level. In the evening, the output of the comparator 41 is reversed to a high level to turn on the illumination lamp. According to this constitution, even when the operation of the indoor switch 2 turns off the illumination lamp temporarily, illumination control can be continued.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of application for J-graduation] The present invention relates to a lighting control device used for automatic flashing of lighting lights in a house.

(Conventional technology) Conventionally, lighting has been used to automatically turn on and off bright lights depending on the surrounding brightness, or to turn on at full brightness when someone is within the detection range, and turn on at dimming mode when no one is present. The device is known (for example, Mitsubishi Electric Technical Report, Vol. 64, N.
o1 1990, page 100, it is introduced as ``Bright/dark 0N10f' 1 person-sensitive dimming porch light J.'' [Invention or problem to be solved] The conventional lighting device as described above was used for entrance lighting. case,
There is a problem in that when family members come home at night and the lights are no longer needed and the indoor switch is turned off, the lighting system will stop working unless the indoor switch is turned on again the next time.

If the indoor switch is left unturned, the problems mentioned above will not occur - the lights will be left on all night long, and for the family, it can't be denied that it is a waste of money.

When used for bedroom lighting, there is a problem in that it is cumbersome to use because one has to turn off the room switch and then turn it on again the next day in order to have a good night's sleep.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a lighting control device that can continue lighting control even after turning off the lights by operating an indoor switch, without further operating the indoor switch. It is something.

[Means for Solving the Problems] In order to achieve the above object, the present invention configures a lighting control device as follows (1), (2), and (3).

(1) illuminance detecting means for detecting illuminance below a predetermined value; period detecting means for detecting a period from momentary power interruption while the illuminance detecting means is generating a detection signal to generation of the detection signal of the illuminance detecting means; A lighting control device comprising: control means for controlling a lighting circuit according to a detection signal from the period detection means.

(2) In the lighting control device according to (1) above, the illuminance detection means is configured such that the voltage of its power supply unit rises by γ (with a delay from the rise of the voltage of the power supply of the entire lighting control device).

(3) In (1) and (2) above, the lighting is provided with a person detection means, and the control means controls the lighting circuit according to the detection signal of the person detection means and the detection signal of the period detection means. Control device.

[Effect]

According to the configurations (1), (2), and (3) above, the lighting circuit is closed when the illuminance is below a predetermined value, and the lighting circuit is opened due to a "momentary power interruption" when the illuminance is below the predetermined value.

According to configuration (2) above, when the illumination circuit is open when the illuminance is below a predetermined value, the illumination circuit is closed again when the power is turned off.

According to configuration (3) above, further, when a person is detected in an illuminance state below a predetermined value, the illumination state changes.

(Example〕 The present invention will be explained in more detail below using examples.

FIG. 1 is a block diagram of a "lighting control device" which is an embodiment of the present invention, and FIG. 2 is an explanatory diagram of the operation of the embodiment.

In FIG. 1, the lighting control equipment is located to the left of the dotted line. 10 is a DC constant voltage power supply circuit (hereinafter simply referred to as "power supply") that supplies power to each element in the device 1, and its input end is connected to a commercial power source via an indoor switch 2 outside the lighting control device 1. There is.

20. 21 is a photocoupler consisting of a light-emitting tie auto and a phototriac, 22 is a resistor, 23 is a bidirectional two-terminal cysostar (SBS), and 24 is connected in series with a lighting lamp (not shown) outside the lighting control device 1. It is a bidirectional three-terminal thyristor (hereinafter referred to as a TRIAC).

30 is a pyroelectric infrared sensor (hereinafter referred to as a human sensor) that detects infrared rays emitted from a human body; 31 is an amplifier that amplifies the output of the human sensor 30; and 32 is an amplifier 31.
Compare the output of
This is a comparator that outputs a high level signal.

40 is an illuminance sensor that detects illuminance; 41 is an illuminance sensor 4
A comparator that compares the output of 0 with reference No. 43 and outputs a high-level signal when the illuminance is below a predetermined value, 50 is a D-type flip-flop that is supplied to the output of comparator 41 or clock terminal C, and 51 is a comparator 41 and the Q terminal output of the D-type flip-flop.

The output of the ant gate 51 is supplied to the enable terminal of the timer 33 and the light emitting diode of the turntable 21.

The timer 33 becomes operational when the human input to the enable terminal is at a high level, and the timer starts operating in response to the high level output of the comparator 32, and supplies a high level output to the photocoupler 20 during its operation.

Note that the comparator 41 is configured so that "the illuminance at the rising edge of the detection signal is equal to the illuminance at the falling edge of the detection signal" so that the device 1 does not cause hunting due to slight fluctuations in the illuminance near a predetermined value. ing.

The operation when the lighting control device 1 having the above configuration is used to control the illumination lights in the entrance will be explained with reference to FIG. 2.

In this case, the human sensor 30 is placed in advance so that the sensing range is within the entrance, and the illuminance sensor 40 is placed so that it can detect the illuminance of light outside the house (hereinafter referred to as outside light).

When the indoor switch 2 is closed in this state, the voltage of the power supply 10 rises, and the D-type flip-flop 50 is reset.
The output of the Q terminal becomes low level. If there is sufficient outside light, the output level of the illuminance sensor 40 is high and the output of the comparator 41 remains low level, so the output of the Q terminal of the D-type flip-flop 50 remains low level.

In the evening, as the outside light decreases, the output level of the illuminance sensor 40 decreases, and when this output level becomes less than the reference signal of the comparator 41, the output level of the comparator 41 is reversed from low to high, and this rise or D type flip-flop 50
Detected at clock terminal C of . At this time, since the data terminal of the D-type flip-flop 50 is at a high level when the power supply 1o is on, the output of the Q terminal is inverted from a low level to a high level.

The output of the comparator 41 becomes high level, the output of the Q9 of the D-type flip-flop 50 becomes high level, the output of the ant gate 51 also becomes high level, the timer 33 becomes operational, and the photocoupler 21 emits light. The diode emits light.

Therefore, the phototriac of the photocoupler 21 turns on, but since there is the resistor 22, the turn-on phase is slightly delayed from the rising edge of each half-wave of the commercial power supply. By turning on this phototriac, a triac 24 connected to an illumination light (not shown) is turned on. Bidirectional two-terminal thyristor 23 pulses the gate input of triac 24 . In this way, the lighting lamp starts to light up in a dimmed state.

The following is the operation in front of time t in FIG.

After that, when a family member returns home and enters the front door, the output level of the human sensor 30 increases. The output of the human sensor 30 is amplified by an amplifier 31 and compared with a reference signal of a comparator 32,
When the presence of a person is detected, the output of the comparator 32 is inverted from low level to high level. With this inverted output, timer 33
During the operation, the output of the timer 33 goes high, the light emitting diode of the photocoupler 20 emits light, and the phototriac turns on immediately after the rise of each half cycle of the commercial power supply.

Thus, the triac 24 turns on at the beginning of each half-cycle of the utility power, and the lamp lights at full brightness. When the timer 33 completes its operation, its output returns from high level to low level again, and the illumination lamp also returns to its dimming state. The time limit of the timer 33 is selected to be an appropriate time, for example, 5 minutes, as necessary.

The following is the operation before and after time 12.13 in FIG.

After that, when going to bed, the indoor switch 2 is instantaneously turned on, turned off, and then turned on. As a result of this operation, the power bar of the power supply 10 momentarily falls and rises, resulting in a "momentary power interruption."

The D-type flip-flop 50 is reset by the rise of the voltage of the power supply 10. Lighting sensor 40. Comparator 41
The illuminance detection stage F, which consists of and the output of the Q terminal is maintained at a low level.

As a result, the output of the comparator 41 is blocked by the AND gate 51, the timer 33 becomes inoperable, the light emitting switch of the photocoupler 21 disappears, the phototriac remains turned off, and the triac 24 also remains turned off. The lighting lights go out.

The above is the operation before and after time t4 in FIG. 2.

As the morning comes and the outside light increases, the output level of the illuminance sensor 40 increases, and the output of the comparator 41 is reversed from high level to low level (time ts).

Next, in the evening, when the external light decreases and the output of the comparator 41 reverses from low level to high level, the D-type flip-flop 50 detects the rising edge at the clock terminal C.
The output of the Q terminal becomes a high level, the output of the AND gate 51 also becomes a high level, and the illumination lamp is turned on in a dimmed state in the same manner as described above (time ts).

Thereafter, when the family member returns home and enters the front door, the illumination lights are turned on in full brightness by the above-described operation (time 11).

Thereafter, when the indoor switch 2 is momentarily operated in the order of ON→OFF→ON, the illumination light is turned off in the same manner as the operation at time t4 (time ta).

To turn on the light again, press the indoor switch 2 for a slightly longer period of time after the light is turned off until the output level of the external light increase comparator 41 is reversed to a low level, that is, the voltage of the power supply section of the illuminance detection means must drop. By this operation, the 'It voltage of the power supply 10 rises, then the voltage of the power supply section of the first stage of illuminance detection rises, the voltage of the power supply lO rises, and then the voltage of the power supply 1O rises. When the voltage of the power supply section of the illuminance detection means exceeds 90 degrees, a "short interruption in the power supply" occurs.

The D-type flip-flop 50 resets the rise of the voltage of the power supply 10 by detecting the rise of the voltage of the power supply 10 and resetting it, the output of the Q terminal becomes low level, and then clocks the rise of the output of the illuminance detection means. Terminal C is detected, and at this point the data terminal is already at a high level, so Q DQ
The child output is inverted to high level. In this way, the illumination lamp is lit again in a dimmed state (time t9).

By the way, when there is almost no outside light and the indoor switch 2 is closed to start the lighting control device 1, the above-mentioned time t
It operates in the same way as in 9. That is, when the indoor switch 2 is turned on, the voltage of the power supply 10 rises, and later the voltage of the power supply section of the illuminance detection means rises. Upon detection and reset, the L output becomes low level, and then the clock terminal C detects the generation of the detection signal of the illumination detection means, and the Q terminal output is inverted from low level to high level. The ant gate 51 outputs a high level due to the high level input from the comparator 41 and the high level input from the D-type flip-flop 50, and the light emitting diode of the photocoupler 21 emits light. Therefore, the illumination light is turned on in a dimmed state.

As explained above, in this embodiment, the illuminance sensor 40.
During the generation of the detection signal of the illuminance detection means consisting of a combination of comparators 41, the period TI, T2 (see FIG. 2) from "momentary power interruption" to generation of the detection signal of the illuminance detection means is determined by a D-type flip-flop. A period detection means (logic circuit) consisting of a combination of 50 and an anchor 51 detects the period, and controls the illumination lamp to be turned off during the periods T I and T 2 .

When turning on the jIF from the off state during the generation of the detection signal of the illuminance detection means, by operating the indoor switch 2, Gen's short poem (yH disconnection) is displayed at °゛1' in a pseudo manner.
The device is turned on again in the same condition as when starting it with almost no outside light.

In the embodiment, whether the voltage of the power supply section of the illuminance detection means rises later than the voltage of the power supply 10 of the entire device, or
The present invention is not limited to this, and may start at the same time. In this case, as at time t9, °゛′1
Even if the source is set to "intermittent", the D-type flip-flop 50 remains in the reset state, and the light cannot be turned on again from the off state at night while the illuminance detection means is generating the signal.

Furthermore, the logic circuit is not limited to the combination of a D-type flip-flop and an anchor, but may be constructed of any appropriate logic element.

Further, the period detecting means is not limited to a logic circuit, but may use a microcomputer to detect the period from momentary power interruption to generation of a detection signal by the illuminance detecting means.

〔Effect of the invention〕

As described above, according to the present invention, even if the indoor switch is operated to temporarily turn off the lighting, the lighting control is maintained;
There is no need to turn on the indoor switch each time you use it, and you can turn the lights on again after they go out, and the lighting can be controlled by the presence of a person.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is an explanatory diagram of the operation of the embodiment. 10... DC constant voltage power supply circuit 21... Photocoupler 24... Triac 40... Illuminance sensor 41... Comparator 50... ...D type flip-flop 51...
・Anthology

Claims (3)

[Claims] (1) illuminance detecting means for detecting illuminance below a predetermined value; period detecting means for detecting a period from momentary power interruption while the illuminance detecting means is generating a detection signal to generation of the detection signal of the illuminance detecting means; A lighting control device comprising: control means for controlling a lighting circuit according to a detection signal from the period detection means. (2) The illumination control device according to claim 1, wherein the illuminance detection means has a power supply whose voltage rises with a delay from the rise of the voltage of the power supply of the entire lighting control device. (3) In the lighting control device according to claim 1 or claim 2, a person detection means is provided, and the control means controls the lighting circuit according to a detection signal of the person detection means and a detection signal of the period detection means. A lighting control device characterized by: