JPH06251877A - Automatic lighting control device for lighting - Google Patents

Abstract

(57) [Summary] [Object] To provide an automatic lighting on / off control device for a lighting device, which allows the device to be freely designed and can quickly and stably shift the lighting device from a lighting-off state to a low-luminance lighting state. [Configuration] The lighting control circuit 13 turns off the illumination lamp 9 when the illuminance of the illumination control area detected by the illuminance detection sensor 4 is equal to or higher than the turn-off illuminance, and when the illuminance is equal to or lower than the low-luminance turn-on illuminance. Turns on the lighting at low intensity,
At that time, if the illuminance is equal to or higher than the turn-off illuminance, the turn-off illuminance is reset. In this state, when the human body detection sensor 1 detects a human body that has entered a predetermined detection range, the lighting control circuit 13 turns on the illumination lamp 9 with high brightness for a predetermined time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic lighting on / off control device for an illumination lamp, which automatically controls lighting and extinction of the illumination lamp, and is particularly installed in stairs, doorways, curved corridors, etc. of buildings, factories, houses, etc. It is suitable to be applied to an illumination lamp.

[0002]

2. Description of the Related Art Conventionally, as this type of automatic turn-on / off control device, there is one disclosed in Japanese Patent Laid-Open No. 3-134994. FIG. 7 is a block diagram showing an electrical configuration of the automatic lighting on / off control device for an illumination lamp described in the publication. In the figure, the human body detection sensor 1 is composed of, for example, a pyroelectric far-infrared sensor, detects far-infrared rays (body temperature) emitted from a human body that has entered a predetermined detection range, and outputs a detection signal m. To do. This detection signal m is amplified by the amplification circuit 2 with a predetermined amplification degree, and then input to the level determination circuit 3. The level determination circuit 3 compares the output signal of the amplification circuit 2 with a preset reference value, and when the output signal of the amplification circuit 2 is equal to or larger than the reference value, the human body detection signal M of "L" level. Is output.

The illuminance detection sensor 4 has a detection signal q at a level corresponding to the illuminance L of an illumination control area (for example, stair space).
Is output. The level determination circuit 5 corresponds to the detection signal q, the first set value corresponding to the extinction illuminance at which the illuminance L should turn off the illuminating lamp 9 described later, and the low brightness lighting illuminance at which the illuminating lamp 9 should be lit at low brightness. The second set value (> the first set value) is compared. Then, the level determination circuit 5 outputs the first detection signal q
When the value is less than the set value, the illuminance detection signal Q of "L" level is output, and once the illuminance detection signal Q of "L" level is output, the detection signal q must be the second set value or more. The illuminance detection signal Q of H "level is not output. Further, the level determination circuit 5 outputs "H" when the detection signal q becomes equal to or higher than the second set value.
The illuminance detection signal Q of the level is output, and once the illuminance detection signal Q of the "H" level is output, the illuminance detection signal Q of the "L" level is output unless the detection signal q becomes the first set value or less. do not do.

The lighting control circuit 6 comprises a microcomputer 7 and a dimming circuit 8. The microcomputer 7 includes a CPU (central processing unit), a program ROM, a RAM for temporarily storing various data, and an I / O.
It is configured by a one-chip IC (integrated circuit) having a built-in O interface, and receives the human body detection signal M output from the level determination circuit 3 and the illuminance detection signal Q output from the level determination circuit 5, respectively. Depending on the states of these signals, the lighting control program stored in the program ROM is executed to control the dimming circuit 8.

The dimming circuit 8 is operated on the basis of, for example, a triac for controlling the phase of a commercial AC voltage of 100 V and a low-luminance lighting command S _L or a high-luminance lighting command S _H output from the microcomputer 7. It is composed of a photocoupler for supplying a trigger signal to the gate and a zero-cross detection circuit for detecting the passage timing of the zero-cross point of the commercial AC voltage of 100V.
The AC power supplied to the illumination lamp 9 suspended from the ceiling above the stairs, which is the illumination control area, is controlled and dimmed. The constant voltage circuit 10 supplies a predetermined constant voltage to each part of the device.

The operation of the CPU in the microcomputer 7 having such a configuration will be described with reference to the flowchart shown in FIG. 8 and the timing chart shown in FIG. When the automatic lighting on / off control device for the illumination lamp shown in FIG. 7 is powered on, the CPU in the microcomputer 7
First, each part of the apparatus is initialized. This initialization includes clearing various registers of RAM in the microcomputer 7 and resetting various flags. Then, the process proceeds to step SA1. In step SA1, the CPU determines whether or not the high-intensity lighting flag HB, which is set to [1] when the illumination lamp 9 is illuminated at high intensity and is reset to [0] otherwise, is set to [1]. To judge. If the result of this determination is "NO", the flow proceeds to step SA2.

At step SA2, the CPU detects the illuminance detection signal Q (FIG. 9) output from the level determination circuit 5.
After reading (b), the process proceeds to step SA3.
In step SA3, the CPU determines that the illuminance detection signal Q is "H".
It is determined whether or not it is at a level, that is, whether or not the illumination control area is currently in a low illumination state requiring illumination, such as at night when there is almost no illumination due to natural light. If the result of this determination is "YES", the flow proceeds to step SA5,
If "NO", the process proceeds to step SA4. The illuminance detection sensor 4 always outputs a detection signal q corresponding to the illuminance of the illumination control area, and the level determination circuit 5 compares the detection signal q with the first and second set values. And now,
Natural light is sufficiently irradiated on the lighting control area in the daytime,
As shown at the left end of FIG. 9A, the illuminance L of the illumination control area
Is sufficient, the detection signal q output from the illuminance detection sensor 4 is equal to or lower than the second set value, and therefore the level determination circuit 5 outputs the "L" level illuminance detection signal Q (see FIG. 9B). Is output to the microcomputer 7 of the lighting control circuit 6. Therefore, the result of the determination in step SA3 is "NO", and the CPU proceeds to step SA4. In step SA4, the CPU does not output the low-luminance lighting command S _L or the high-luminance lighting command S _H , and returns to step SA1. Therefore, since the photocoupler of the dimming circuit 8 does not supply the trigger signal to the gate of the triac, the triac does not conduct, the illumination lamp 9 is off, and the luminance ratio B is as shown in FIG. As shown at the left end, it is 0% when the brightness ratio B during high-luminance lighting is 100%.

[0008] Eventually, when the sun goes down and natural light is not radiated to the illumination control area so much, and the illuminance L of the illumination control area becomes low as shown in Fig. 9 (a), the illuminance detection sensor. The detection signal q output from 4 is the second
Since the value is equal to or more than the set value, the illuminance detection signal Q (see FIG. 9B) of "H" level is output from the level determination circuit 5 and supplied to the microcomputer 7 of the lighting control circuit 6.
Therefore, the result of the judgment in step SA3 is "Y
ES ”, and the CPU proceeds to step SA5. In step SA5, the CPU sends the low-luminance lighting command S _L to the photocoupler of the dimming circuit 8 in synchronization with the output signal of the zero-cross detection circuit of the dimming circuit 8, and then proceeds to step SA6. As a result, the photocoupler sends a trigger signal of a predetermined cycle to the gate of the triac, so that the triac conducts at the firing phase α _L (for example, an electrical angle of 150 °) to light the illumination lamp 9 at a low brightness. Therefore, as shown in FIG. 9C, for example, the brightness ratio B of the illumination lamp 9 is 20% when the brightness ratio B during high-luminance lighting is 100%, and the illuminance L of the illumination control area is L. Fig. 9
As shown in (a), a predetermined low illuminance is obtained. Further, when the result of the determination in step SA1 is "YES", that is, when the high brightness lighting flag HB is set to [1], the process proceeds to step SA6.

At step SA6, the CPU detects the human body detection signal M output from the level determination circuit 3 (see FIG. 9).
(See (d)), the process proceeds to step SA7.
In step SA7, the CPU determines that the human body detection signal M is "
It is determined whether or not it is the L "level, and the result of this determination is
If "YES", proceed to step SA8, "NO"
In case of, it returns to step SA1. Human body detection sensor 1
Always detects far infrared rays emitted from the body of a person who has entered a predetermined detection range and outputs a detection signal m.
The detection signal m is amplified by the amplification circuit 2 with a predetermined amplification degree, and then compared with the reference value by the level determination circuit 3. And when a person enters the detection range,
Since the output signal of the amplifier circuit 2 becomes the reference value or more, the human body detection signal M of the "L" level from the level determination circuit 3 (see FIG. 9).
(See (d)) is output and supplied to the microcomputer 7 of the lighting control circuit 6. Therefore, step SA
The result of the judgment in 7 is “YES”, and the CPU
Go to step SA8.

In step SA8, the high-luminance lighting flag H
It is determined whether or not B is set to [1], that is, whether or not another person is presently in the illumination control area and the illumination lamp 9 is already turned on with high brightness. The result of this judgment is "N
When it is "O", the process proceeds to step SA9. Step SA9
In, the CPU sends a high-intensity lighting command S _H to the photocoupler of the dimming circuit 8 in synchronization with the output signal of the zero-cross detection circuit of the dimming circuit 8 and sets the high-intensity lighting flag HB to [1]. At the same time, the timer interruption process or the timer (not shown) starts measuring the set time T. As a result, the photocoupler of the dimming circuit 8 sends a trigger signal of a predetermined cycle to the gate of the triac, so that the triac has an ignition phase α _H (for example, electrical angle 30 ° = α _H).
When <α _L ) is established, the illuminating lamp 9 starts high-luminance lighting.
Therefore, the brightness ratio B of the illumination lamp 9 is 100% as shown in FIG.

At this time, the illuminance L of the illumination control area is as shown in FIG.
As shown in (a), since the illuminance is high, the illuminance detection sensor 4 outputs the detection signal q corresponding to the high illuminance. Therefore, the level determination circuit 5 compares the detection signal q with the first set value, determines that the illumination control area is in the high illuminance state, and determines the "L" level illuminance detection signal Q (see FIG. 9B. ) Is output), but the CPU ignores the illuminance detection signal Q until the above-mentioned set time T elapses until the timer interrupt processing or the count value by the timer (not shown) becomes a predetermined value or more. , The high-brightness lighting command S _H in synchronization with the output signal of the zero-cross detection circuit of the dimmer circuit 8
Continue to send to the photo coupler of. Here, the set time T
Is defined to be approximately equal to the time it takes a person to pass through the lighting control area at normal speed.

When the set time T elapses and the timer interrupt processing or the count value by the timer (not shown) becomes a predetermined value or more, the CPU causes the photocoupler of the dimming circuit 8 for the high-luminance lighting command S _H. Is stopped, and the high-intensity lighting flag HB is reset to [0], and then the process returns to step SA1. Thereby, the illuminance L of the illumination control area
As it becomes darker as shown in FIG. 9A, the illuminance detection sensor 4 outputs a detection signal q corresponding to the illuminance. Therefore, when the detection signal q is equal to or higher than the second set value, the level determination circuit 5 determines that the illumination control area is in the low illuminance state and outputs the "H" level illuminance detection signal Q. As a result, in the operations of steps SA1 to SA5 described above, the CPU turns on the illumination lamp 1 with low luminance to set the illumination control area illuminance L to a predetermined low illumination, as shown in FIG. 9A.

On the other hand, when the result of the determination in step SA8 is "YES", that is, there is another person in the illumination control area at present, the illumination lamp 9 is already lit with high brightness, and the high brightness lighting flag HB is [ If it is set to 1], the CPU proceeds to step SA10. Step SA
In 10, the CPU resets the timer interrupt process or the time counting by the timer (not shown), starts the time counting of the set time T again, and then returns to step SA1. Therefore,
The illumination lamp 9 continues to maintain the high-luminance lighting state for the set time T. Further, when the result of the determination in step SA7 is "NO", that is, when the human body detection signal M is at "H" level because no person has entered the predetermined detection range, the CPU executes the step Return to SA1. In this way, the illumination lamp is automatically turned on and off.

[0014]

However, in the above-mentioned conventional automatic lighting on / off control device for an illumination lamp, the illuminance detection sensor 4 is installed very close to the illumination lamp 9, and the illumination lamp 9 has a wattage. If a relatively large one is used, the level determination circuit 5 erroneously determines that the illumination control area is in a high illuminance state due to the influence of illumination by the illumination lamp 9 that is controlled by itself and is turned on at a low brightness. Therefore, there is a fear that the illuminance detection signal Q of "L" level is output. In this case, FIG.
As shown in the two indefinite ranges of (a) to (c), the illumination lamp 9 repeatedly turns on and off with low luminance, and the state is not stable. Therefore, in order to prevent the above-mentioned inconvenience, the illuminance detection sensor 4 is installed away from the illumination lamp 9, the illumination lamp 9 having a relatively small wattage is used, or the illumination is detected by the level determination circuit 5. The first set value corresponding to the turn-off illuminance at which the lamp 9 should be turned off must be set low. Therefore, if the design of the device is restricted or the first set value is set too low, the illumination lamp 9 will not be turned off even after the dawn and the illuminance by natural light becomes sufficient. May occur.

The present invention has been made in view of the above-mentioned circumstances, and provides an illumination lamp in which the device can be freely designed and the illumination lamp can be quickly and stably switched from the extinguished state to the low-luminance illuminated state. An object is to provide an automatic lighting / extinguishing control device.

[0016]

In order to solve the above-mentioned problems, the invention according to claim 1 is an illuminance detecting means for detecting the illuminance of an illumination control area in which the illuminance by an illuminating lamp is controlled, and the illuminance detecting means. When the illuminance detected by is equal to or higher than the first reference illuminance at which the illuminating lamp should be turned off, the illuminance is turned off, and the illuminance is equal to or less than the second reference illuminance at which the illuminating lamp should be turned on with low brightness. In the case of, the first control means for turning on the illumination lamp at a low brightness, and the first control means for resetting the first reference illuminance when the illumination lamp is switched from a light-off state to a low-brightness lighting state. It is characterized by comprising two control means.

According to the present invention, the illuminance detecting means for detecting the illuminance of the illumination control area in which the illuminance by the illuminating lamp is controlled, and the illuminance detected by the illuminance detecting means turn off the illuminating lamp. If the illuminance is equal to or higher than the first reference illuminance that should be turned on, and if the illuminance is equal to or lower than the second reference illuminance at which the illuminance is to be turned on with low brightness,
First control means for lighting the illumination lamp at a low brightness, and only when the illuminance is equal to or higher than the first reference illuminance when the illumination lamp is shifted from a light-off state to a low-luminance lighting state. And a second control unit for resetting the first reference illuminance.

Further, the invention according to claim 3 is that the human body detecting means for detecting a human body entering the illumination control area or its vicinity and the human body detecting means for detecting the human body while the illumination lamp is lit at a low brightness. It is characterized in that a third control means for turning on the illumination lamp for a predetermined period of time with high brightness when the signal indicating the detection is supplied is added.

[0019]

According to the structure of the present invention, when the illuminance of the illumination control area becomes equal to or lower than the second reference illuminance due to darkness or the like, the control means turns on the illumination lamp at a low brightness. 1
Reset the reference illuminance. According to the above configuration, the device can be freely designed, and the illumination lamp can be quickly and stably shifted from the extinguished state to the low-luminance illuminated state. At this time, a function to determine whether the illuminance at the time of low-luminance lighting exceeds the first reference illuminance is added, and the first reference illuminance is reset only when the illuminance exceeds the first reference illuminance. If the treatment is performed, more reliable stability can be obtained. Further, the human body detecting means is installed in the lighting control area or in the vicinity thereof, and when the human body enters the lighting control area or in the vicinity thereof under the low-luminance lighting state, the lighting lamp is kept in the high-luminance lighting state for a predetermined time. If you make a transition, traffic at night will be much safer.

[0020]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an electrical configuration of an automatic lighting control system for an illumination lamp according to a first embodiment of the present invention, and FIG. 2 is a CPU in a microcomputer incorporated in the automatic lighting control system. FIG. 3 is a flowchart showing the operation processing procedure of FIG. 3, and FIG. 3 is a timing chart showing the timing of various signals output from each unit of the automatic lighting control apparatus and the state of the brightness of the illumination lamp. Figure 1
As shown in FIG. 7, the illumination control sensor of this example is largely different from the conventional illumination control device shown in FIG. 7 in that the illuminance detection sensor 4 outputs instead of the level determination circuit 5 and the microcomputer 7. The point is that the microcomputer 12 having the built-in A / D converter 11 for analog-digital converting the analog detection signal q into the digital illuminance detection data QD is provided. The dimming circuit 8 and the microcomputer 12 form a lighting control circuit 13. In FIG. 1, parts corresponding to those in FIG. 7 are assigned the same reference numerals and explanations thereof are omitted.

In such a configuration, when the power is turned on, the CPU in the microcomputer 12 first
Initialize each part of the device. This initialization includes clearing various registers of RAM in the microcomputer 12 and resetting various flags. At this time, as the initial value of the turn-off level data NL to be compared with the illuminance detection data QD, the illuminance detection signal q shown in FIG.
An initial value NL ₀ corresponding to the extinguishing level initial value of is set. Here, the turn-off level data NL is the value of the illuminance detection data QD when the illuminance of the illumination control area is the turn-off illuminance at which the illumination lamp 9 should be turned off. Then, the CPU is
Go to step SB1 shown in.

At step SB1, the CPU causes the illumination lamp 9
The state of the lighting state flag LF, which is set to [2] during high-luminance lighting, set to [1] during low-luminance lighting, and reset to [0] when unlit, is checked. And
The illumination lamp 9 is off, and the lighting state flag LF is [0].
If it has been reset to, the CPU executes the step S
Go to B2.

In step SB2, the CPU detects the detection signal q output from the illuminance detection sensor 4 (see FIG. 3A).
After reading the illuminance detection data QD which is analog-digital converted by the A / D converter 11, the process proceeds to step SB3. In step SB3, the CPU determines that the illuminance detection data QD is “the illuminance of the illumination control area is the illumination lamp 9
Is a low-luminance lighting illuminance that should be low-luminance lighting, that is, the value of the illuminance detection signal q, that is, the low-luminance lighting level (see FIG.
(See (a)) is larger than the low brightness lighting level data LL, that is, whether the illumination control area is currently in a low illumination state requiring illumination, such as at night, when there is almost no illumination due to natural light. To judge.

The illuminance detection sensor 4 always outputs a detection signal q corresponding to the illuminance in the illumination control area, and the A / D converter 11 in the microcomputer 12 converts the detection signal q into an analog / digital signal, Illuminance detection data Q
D is output. Then, at present, in the daytime or the like, natural light is sufficiently applied to the illumination control area, and when the illumination control area has sufficient illuminance, it is output from the illuminance detection sensor 4,
Since the detection signal q supplied to the microcomputer 12 of the lighting control circuit 13 is at or below the low brightness lighting level as shown at the left end of FIG. 3A, the illuminance detection data QD is at or below the low brightness lighting level data LL. And step SB
The result of determination in 3 is "NO", and the CPU does nothing to return the illumination lamp 9 to the off state, and returns to step SB1. Eventually, when the sun goes down and natural light is not radiated to the illumination control area so much that the illumination intensity of the illumination control area becomes low, the illumination intensity detection sensor 4 outputs the illumination intensity as shown in FIG. Since the detection signal q that is higher than the low-luminance lighting level is higher than the low-luminance lighting level, the detection signal q that is higher than the low-luminance lighting level is sent to the microcomputer 12 of the lighting control circuit 13. As a result, the illuminance detection data QD becomes larger than the low-luminance lighting level data LL, so the result of the determination in step SB3 is "YE.
S ”, and the CPU proceeds to step SB4.

In step SB4, the CPU sets the lighting state flag LF to [1] indicating the low-luminance lighting state, and at the same time, outputs the low-luminance lighting command S _L in synchronization with the output signal of the zero-cross detection circuit of the dimming circuit 8. Is supplied to the photocoupler of the light control circuit 8, and the process proceeds to step SB5. As a result, the photocoupler sends a trigger signal of a predetermined cycle to the gate of the triac, so that the triac conducts at the firing phase α _L (for example, an electrical angle of 150 °) and the illumination lamp 9
To a low-luminance lighting state. Therefore, the brightness ratio B of the illumination lamp 9 is 20%, for example, when the brightness ratio B during high-luminance lighting is 100%, as shown in FIG. Further, since the illuminance of the illumination control area also becomes a predetermined low illuminance, the value of the detection signal q also becomes a predetermined value as shown in FIG.

In step SB5, the CPU reads the illuminance detection data QD again, and then proceeds to step SB6. In step SB6, the CPU determines the illuminance detection data Q
It is determined whether D is larger than the turn-off level data NL (initial value NL ₀ initially). When the result of this determination is “NO”, that is, when the illumination lamp 9 is turned on at low brightness, the value of the detection signal q output from the illuminance detection sensor 4 becomes equal to or less than the extinction level, and the illuminance detection data QD. If is below the turn-off level data NL, the CPU
Proceeds to step SB7. In step SB7, CP
After reducing the turn-off level data NL by a predetermined amount, the U returns to step SB5 and returns to steps SB5 to SB7 described above.
Repeat the operation of. Then, when the result of the determination in step SB6 is “YES”, the CPU proceeds to step S
Return to B1. As a result, the illuminating lamp 9 is stably operated without being repeatedly turned on and off at low brightness many times due to the installation position of the illuminance detection sensor 4 or the wattage of the illuminating lamp 9 unlike the related art. Lights at low brightness.

Next, in the state checking operation of the lighting state flag LF in step SB1, when the lighting state flag LF is already set to [1] indicating the low brightness lighting state, the CPU proceeds to step SB8. . In step SB8, the CPU reads the illuminance detection data QD, and then proceeds to step SB9 to detect the illuminance detection data QD.
Is greater than the turn-off level data NL.
Here, if the determination is “NO”, the CPU proceeds to step SB10. In step SB10, the CPU stops the output of the low-luminance lighting command S _L and returns the turn-off level data NL to the initial value NL _0, and then, in step SB1.
Return to. As a result, the photocoupler of the dimming circuit 8 stops sending the trigger signal to the gate of the triac, so that the triac is no longer conducting and the lamp 9 is turned off. Ratio of brightness B
Is 100%, it becomes 0%.

On the other hand, when the result of the judgment in step SB9 is "YES", that is, when the illuminance detection data QD is larger than the turn-off level data NL, the CPU
It proceeds to step SB11. Also, when the result of the determination in step SB1 is "YES", that is, when the lighting state flag LF is set to [2] indicating the high-luminance lighting state, the CPU proceeds to step SB11.

In step SB11, the CPU reads the human body detection signal M (see FIG. 3C) output from the level determination circuit 3, and then proceeds to step SB12 where the human body detection signal M is at "L" level. Or not. The human body detection sensor 1 constantly detects far infrared rays emitted from the body of a person who has entered a predetermined detection range, and outputs a detection signal m. The detection signal m is amplified by the amplification circuit 2 with a predetermined amplification degree, and then the level determination circuit 3
In, it is compared with the set value. Then, when a person enters the detection range, the output signal of the amplifier circuit 2 becomes equal to or higher than the set value, and therefore the level determination circuit 3 outputs the human body detection signal M of "L" level (see FIG. 3C). , To the microcomputer 12 of the lighting control circuit 13. Therefore, the result of the judgment in step SB12 is "YE
S ”, and the CPU proceeds to step SB13.

In step SB13, it is determined whether or not the lighting state flag LF is set to [2], that is, whether or not another person is presently in the lighting control area and the lighting lamp 9 is already lit with high brightness. Is judged. Here, "N
When the determination result of "O" is obtained, the process proceeds to step SB14. In step SB 14, CPU in synchronization with the output signal of the zero-crossing detector circuit of the dimming circuit 8 sends a high intensity lighting command S _H to the photocoupler of the light control circuit 8, sets the lighting state flag LF in [2] At the same time, the timer interruption process or the timer (not shown) starts measuring the set time T. As a result, the photo coupler of the dimming circuit 8
Since the trigger signal of a predetermined cycle is sent to the gate of the triac, the triac conducts at the ignition phase α _H (for example, electrical angle 30 ° = α _H <α _L ) and starts the high-luminance lighting of the illumination lamp 9. . Therefore, the ratio B of the brightness of the lamp 9 is
As shown in FIG. 3B, it becomes 100%.

At this time, since the illuminance of the illumination control area becomes high, the illuminance detection sensor 4 outputs a detection signal q corresponding to high illuminance, as shown in FIG. 3 (a). Therefore, the A / D converter 1 in the microcomputer 12
1 outputs illuminance detection data QD of a level corresponding to this detection signal q, but the CPU interrupts the timer when the set time T described above elapses, or the count value by a timer (not shown) reaches a predetermined value. Until the above, the illuminance detection data QD is ignored and the high-luminance lighting command S _H is continuously sent to the photocoupler of the dimming circuit 8 in synchronization with the output signal of the zero-cross detection circuit of the dimming circuit 8. Here, the set time T is almost equal to the time for a person to pass through the illumination control area at a normal speed, as in the conventional case. Then, when the set time T elapses and the count value by the timer interrupt process or the timer (not shown) exceeds a predetermined value, the CPU
Sends a low-luminance lighting command S _L to the photocoupler of the dimming circuit 8 instead of the high-luminance lighting command S _H , sets the lighting state flag LF to [1], and then returns to step SB1. As a result, the illuminance of the illumination control area becomes the illuminance corresponding to the low-luminance lighting of the illuminating lamp 9.

On the other hand, when the result of the determination in step SB13 is "YES", that is, there is another person in the illumination control area, the illumination lamp 9 has already been turned on with high brightness, and the lighting state flag LF is [2. ]], The CPU proceeds to step SB15. Step SB
At 15, the CPU resets the timer interrupt processing or the time counting by a timer (not shown), and restarts the time counting of the set time T. Therefore, the illumination lamp 9 continues to maintain the high-luminance lighting state for the set time T. After the set time T elapses, the illumination lamp 9 is shifted from the high-luminance lighting state to the low-luminance lighting state, and then the process returns to step SB1 as in the operation of step SB14 described above. In addition, when the result of the determination in step SB12 is “NO”, that is, because no person has entered the predetermined detection range,
When the human body detection signal M is at "H" level, the CPU
Returns to step SB1.

Next, a second embodiment of the present invention will be described. FIG. 4 is a block diagram showing an electrical configuration of an automatic lighting / extinguishing control device according to a second embodiment of the present invention. In FIG. 4, a judgment level adjusting circuit 14 for adjusting the first set value of the level judging circuit 5 is newly provided under the control of the CPU in the microcomputer 7. Where the first
The initial value of the set value is, as shown in FIG.
Is a value corresponding to the illuminance L (light-off illuminance initial value) of the illumination control area when is lit with low brightness.

In such a structure, as shown in FIG. 5A, when the illuminance L of the illumination control area becomes a low-luminance lighting illuminance at which the illuminating lamp 9 should be lit with low luminance, as shown in FIG. 5B. Then, the level determination circuit 5 outputs the illuminance detection signal Q of "H" level. As a result, the CPU in the microcomputer 7 turns on the illumination lamp 9 at a low brightness (see FIG. 5).
(See (d)) and the illuminance L of the illumination control area are shown in FIG.
As shown in FIG. 5B, the illuminance detection signal Q output from the level determination circuit 5 becomes the “L” level as shown in FIG.

Next, the CPU in the microcomputer 7
Is a predetermined time after the lighting lamp 9 is turned on at a low brightness,
The first set value adjustment command is sent to the determination level adjustment circuit 14. Accordingly, the determination level adjustment circuit 14 reduces the first set value of the level determination circuit 5 to a value corresponding to the turn-off illuminance change value of the illuminance L of the illumination control area illustrated in FIG. As shown in (c), the “H” level first set value adjustment signal A is sent to the level determination circuit 5. Therefore, the level determination circuit 5 compares the detection signal q output from the illuminance detection sensor 4 with the changed first setting value,
As shown in FIG. 5B, the "H" level illuminance detection signal Q
Is output.

In such a state, the human body detection sensor 1 always detects far infrared rays radiated from the human body that has entered the predetermined detection range and outputs the detection signal m. The detection signal m is amplified by the amplification circuit 2 with a predetermined amplification degree, and then compared with the set value by the level determination circuit 3. When a person enters the detection range, the output signal of the amplifier circuit 2 becomes equal to or higher than the set value, so that the level determination circuit 3 outputs the "L" level human body detection signal M (see FIG. 5).
(See (e)) is output and sent to the microcomputer 7 of the lighting control circuit 6.

Therefore, the CPU in the microcomputer 7 turns on the illuminating lamp 9 with high brightness, and starts the set time T by a timer interrupt process or a timer (not shown). As a result, the brightness ratio B of the illumination lamp 9
Becomes 100% as shown in FIG. 5 (d),
The illuminance L of the illumination control area also becomes bright as shown in FIG. Then, when the set time T elapses and the count value by the timer interrupt process or the timer (not shown) reaches or exceeds the predetermined value, the CPU shifts the illumination lamp 9 from the high-luminance lighting state to the low-luminance lighting state. As a result, the illuminance L of the illumination control area is set to the illumination lamp 9 as shown in FIG.
The illuminance corresponds to the low brightness lighting.

The CPU continues to output the first set value adjustment command until the illuminance L of the illumination control area becomes brighter than the turn-off illuminance change value and the illumination lamp 9 is turned off. Therefore, the determination level adjusting circuit 14 continues to send the “H” level first setting value adjusting signal A to the level determining circuit 5,
The level determination circuit 5 continues to compare the detection signal q output from the illuminance detection sensor 4 with the changed first set value. Then, when the illumination lamp 9 is turned off, the CPU causes the first
Since the output of the setting value adjustment command is stopped, the judgment level adjusting circuit 14 sends the first setting value adjusting signal A of "L" level to the level judging circuit 5. As a result, the level determination circuit 5 returns the first set value to the value corresponding to the initial light-off illuminance value, and compares the returned first set value with the detection signal q again.

Although the embodiments of the present invention have been described in detail above with reference to the drawings, the specific configuration is not limited to these embodiments, and the design can be changed without departing from the gist of the present invention. Etc. are included in the present invention. For example,
The illuminance ratio B during low-luminance lighting is 20% that during high-luminance lighting.
Not limited to. Further, in the above-mentioned first embodiment,
The case of using the microcomputer 12 having the A / D converter 11 built therein has been described, but the present invention is not limited to this, and the same effect as described above can be obtained even if the microcomputer 12 is provided between the illuminance detection sensor 4 and the microcomputer 12. it can. Further, in the above-described embodiment, at the time of low-brightness lighting, when a human body is detected in the lighting control region or in the vicinity thereof, the case of transitioning to a high-brightness lighting state was described. When the illuminance is sufficiently bright so as not to hinder the passage of people, the high-luminance lighting may be omitted.

Further, in the above-mentioned first embodiment, the case where the lower limit value of the illuminance to be turned off is not particularly set is described.
As shown in FIG. 6, the lower limit value of the illuminance of turning off (lower limit value of level)
May be set in advance. Further, in the above-described embodiment, the light-off level data NL is returned to the initial value NL ₀ when the illumination lamp is shifted from the low brightness state to the light-off state, and the first set value corresponds to the light-off illuminance initial value. The case where the lighting control device is newly installed in the lighting control area and the lighting lamp 9 is first switched from the extinguished state to the low-luminance lighting state is not limited to this. Only the turn-off level data NL and the first set value are changed, and thereafter, the turn-off level data NL that is always changed
Alternatively, the first set value may be used.

Further, in the above-described embodiment, the illumination lamp 9 is based on the detection signal m output from the human body detection sensor 1.
I explained about the case of turning on the high brightness,
It is not limited to this. For example, in the vicinity of the lighting control area, a sound detection sensor that detects sounds such as voices and clapping sounds emitted by a person, a foot switch that is installed on the floor near the lighting control area, and is turned on by being stepped on by a person, for opening and closing the door. Depending on the signal output from each of the door switch that is turned on / off, the vibration detection sensor that detects the vibration generated when a person walks on the floor, etc., the remote control operator operated by the person, etc. 9 may be turned on with high brightness, or the illumination lamp 9 may be turned on with high brightness in conjunction with unlocking of a door or the like.

As described above, according to the automatic lighting control device for an illuminating lamp of the present invention, low brightness lighting is affected by the installation position of the illuminance detecting means or the wattage of the illuminating lamp as in the conventional case. It is possible to quickly and stably shift the illumination lamp from the extinguished state to the low-luminance lit state without repeating the state and the extinguished state many times. Therefore, since the installation position of the illuminance detecting means and the wattage of the illumination lamp can be freely selected, the device can be freely designed.

[Brief description of drawings]

FIG. 1 is a block diagram showing an electrical configuration of an automatic lighting control system for an illumination lamp according to a first embodiment of the present invention.

FIG. 2 is a flowchart showing an operation of a CPU in a microcomputer incorporated in the automatic lighting on / off control device.

FIG. 3 is a timing chart showing the timing of various signals output from each unit of the automatic lighting on / off control device and the state of the brightness of the illumination lamp.

FIG. 4 is a block diagram showing an electrical configuration of an automatic lighting control system for an illumination lamp according to a second embodiment of the present invention.

FIG. 5 is a timing chart showing the timing of various signals output from each unit of the same automatic lighting / extinguishing control device, the illuminance of the illumination control area, and the ratio of the luminance of the illumination lamp.

FIG. 6 is a timing chart for explaining a modification of the first embodiment.

FIG. 7 is a block diagram showing an electrical configuration of a conventional automatic lighting control device for an illumination lamp.

FIG. 8 is a flowchart showing an operation of a CPU in a microcomputer incorporated in the automatic lighting on / off control device.

FIG. 9 is a timing chart showing timings of various signals output from each unit of the automatic lighting on / off control device and illuminance of an illumination control area.

[Explanation of symbols]

1 Human Body Detection Sensor (Human Body Detection Means) 4 Illuminance Detection Sensor (Illuminance Detection Means) 9 Illumination Lamp 13 Lighting Control Circuit (First, Second and Third Control Means)

Claims (3)

[Claims] 1. An illuminance detecting means for detecting an illuminance of an illumination control area in which the illuminance of the illuminating lamp is controlled, and an illuminance detected by the illuminance detecting means is equal to or more than a first reference illuminance for turning off the illuminating lamp. In some cases, the first control means for turning off the illumination lamp, and when the illuminance is less than or equal to a second reference illuminance at which the illumination lamp should be turned on with low brightness, turn on the illumination lamp with low brightness. A second control means for resetting the first reference illuminance when the first control means shifts the illumination lamp from a light-off state to a low-luminance lighting state. Automatic lighting control device for lighting. 2. An illuminance detecting means for detecting an illuminance of an illumination control area in which the illuminance of the illuminating lamp is controlled, and an illuminance detected by the illuminance detecting means is equal to or higher than a first reference illuminance for turning off the illuminating lamp. In some cases, the first control means for turning off the illumination lamp, and when the illuminance is less than or equal to a second reference illuminance at which the illumination lamp should be turned on with low brightness, turn on the illumination lamp with low brightness. When the illuminance is equal to or higher than the first reference illuminance when the first control means shifts the illumination lamp from the extinguished state to the low-brightness lit state, the first reference illuminance is set to An automatic lighting on / off control device for an illuminating lamp, comprising: a second control means for resetting. 3. A human body detecting means for detecting a human body that enters the illumination control area or its vicinity, and a supply of a signal indicating that the human body is detected by the human body detecting means while the illumination lamp is lit at a low brightness. When I received the
The automatic lighting on / off control device for an illuminating lamp according to claim 1 or 2, further comprising a third control means for illuminating the illuminating lamp with high intensity for a predetermined time.