JPH07312295A - Lighting control device - Google Patents

Abstract

PURPOSE:To provide a comfortable lighting control device which can save energy, and never give an uncomfortable feeling or a sense of incompatibility to a person. CONSTITUTION:When a control part 4 receives the detection signal from a human body detecting sensor 3, a prescribed command (data) is given to a timer part 5 and a memory part 6. The timer part 5 and the memory part 6 perform various processings on the basis of the command, and return the data for the processing result to the control part 4. The control part 4 gives a control data to a dimming signal output part 2 on the basis of the returned data. The dimming signal output part 2 varies the dimming level of each lighting device 1 by a dimming signal on the basis of the control data given from the control part 4. When the last but one detecting time interval is longer than the last detecting time interval, the delay time can be shortened according to the difference to save the energy. When the detecting time interval is conversely short, the delay time can be extended to prevent an uncomfortable feeling or a sense of incompatibility from being given to a person.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the lighting and lighting of an illuminating device used in places such as offices and conference rooms where entry and exit of people are complicated.
The present invention relates to an illumination control device that performs light-off and dimming control.

[0002]

2. Description of the Related Art Conventionally, as a lighting device and a lighting control device used in a place where people frequently come and go such as an office or a conference room, a human body detection sensor is used to detect the presence of a person in the office or the conference room. There is a lighting control device that detects the presence / absence and turns on the lighting device to turn on the lighting when a person is present, and turns off the lighting device and turns off the lighting after a certain time (delay time) has passed after the person is not present. (Actual No. 63-128697, No. 63-162498)
No., Microfilm of Jitsukaihei 1-104697 and Microfilm of Jitsukaihei 5-59798). In the above configuration, the delay time from when there is no person until the lighting device is turned off can be arbitrarily set.

[0003]

However, in the above-mentioned conventional structure, since the delay time is fixed to a preset arbitrary value, people do not frequently enter and leave the illuminated area, and When there is a relatively long time from when the person is absent to when a person appears again, there is a problem that unnecessary power is consumed by the illumination during the delay time.

Further, when a person appears immediately after the lighting device is turned off, the lighting device repeatedly turns on and off in a complicated manner, which causes a change in the lighting level in the lighting region, which may cause discomfort to the person. There was a problem of giving a sense of discomfort. The present invention is intended to solve the above problems, and an object of the present invention is to provide a comfortable lighting control device that can save energy and that does not cause discomfort or discomfort to people.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the invention of claim 1 is a lighting control device for turning on / off a dimmable lighting means and controlling dimming, and detects a human body. And a human body detection unit that outputs a detection signal when the detection signal is output, and performs illumination of the first illumination level for manned while the detection signal is being output, and the first delay time elapses after the detection signal disappears. A control means for controlling the lighting means so as to switch to an unmanned second lighting level having an illuminance lower than the lighting level, and a detection signal is once output after the detection signal is output, and the detection signal is output again. And a timer means for measuring a detection time interval until the time, and the control means sets the delay time of this time in accordance with the difference between the detection time interval of the previous time and the detection time interval of the two times before. To do.

According to a second aspect of the present invention, there is provided an illumination control device for controlling lighting / extinction of dimmable lighting means and dimming control.
Human body detection means for outputting a detection signal when a human body is detected, and illumination of a first illumination level for human beings while the detection signal is being output, and after a predetermined delay time has elapsed since the detection signal disappeared. Control means for controlling the lighting means so as to switch to unmanned second lighting level illumination with an illuminance lower than the first lighting level, and then a detection signal is output after switching to the second lighting level. And a timer means for measuring the illumination time interval until,
The present invention is characterized in that the delay time of this time is set according to the difference between the previous lighting time interval and the lighting time interval of two times before.

The invention of claim 3 relates to claim 1 or claim 2.
In the invention, the control means sets the delay time so that the delay time does not exceed a predetermined upper limit value. The invention of claim 4 is characterized in that, in the invention of claims 1 to 3, the control means sets the delay time so that the delay time does not fall below a predetermined lower limit value.

The invention of claim 5 is the first to fourth aspects of the invention.
In the invention, the control means sets the delay time so as to have a hysteresis. Claim 6
In the invention of claim 1, in the inventions of claims 1 to 5, the control means controls the lighting means so as to fade the lighting level when switching between the first lighting level and the second lighting level. While the characteristic human body is detected, while the detection signal output from the human body detection unit is being received, the control unit controls the illumination unit to perform illumination of the first illumination level for manned and the detection signal disappears. After a lapse of a predetermined delay time, the illumination is switched to an unmanned second illumination level having an illuminance lower than the first illumination level, and after the control means receives the detection signal, the detection signal once disappears and the detection signal is detected again. The delay time of this time is set according to the difference between the detection time interval of the previous time and the detection time interval of the last two times with respect to the detection time interval until receiving.

[0009]

According to the above construction, since the delay time for each time can be set in correspondence with the frequency of people coming in and going out, it is possible to reduce the power consumption by the lighting and save energy, and at the same time, reduce the lighting level. It is possible to provide a comfortable lighting environment by reducing discomfort and discomfort caused to a person by the change.

By setting an upper limit value and a lower limit value for the delay time, it is possible to prevent the delay time from becoming longer or shorter than necessary. Furthermore, by providing a hysteresis in the setting of the delay time and changing the set value of the delay time depending on whether the number of people coming in or going out increases, a comfortable lighting environment with less discomfort can be provided. .

By fading the illumination level when switching between the first illumination level and the second illumination level, it is possible to reduce the power consumption by the illumination during the delay time and save energy. is there.

[0012]

【Example】

(Embodiment 1) FIG. 1 is a schematic block diagram of a lighting control system using a lighting control device A in this embodiment. This control system includes a plurality of illuminating devices 1 that are dimmable at predetermined locations, and a dimming signal output unit that gives a dimming signal that variably controls the dimming level of the illuminating device 1 to each illuminating device 1. Two
A human body detection sensor unit 3 that outputs a detection signal when a human body existing in the detection area is detected, and a control that gives control data to the dimming signal output unit 2 when the detection signal from the human body detection sensor unit 3 is received. It includes a unit 4, a timer unit 5 for delaying a delay time, which will be described later, and a memory unit 6 for storing various data such as the delay time for each time.

The dimming signal output unit 2 changes the dimming level of each illuminating device 1 by the dimming signal based on the control data given from the control unit 4, and the dimming signal is a pulse signal. The lighting device 1 has a light output that changes in accordance with the duty ratio of the pulse signal. For example, 100% lighting (all lighting) is performed when the duty ratio is 0%. That is, in this embodiment, the control unit is constituted by the control unit 4 and the dimming signal output unit 2.

The human body detection sensor section 3 is provided with an infrared sensor for detecting infrared rays emitted from the human body using, for example, a pyroelectric element, and when a human body is detected, a detection signal as shown in FIG. Output. It should be noted that the method of detecting a human body is not limited to the infrared detection by the pyroelectric element described above, and a human body may be detected by another method.

The control unit 4 monitors the detection signal from the human body detection sensor unit 3 and, when receiving the detection signal, the dimming signal output unit 2
Data for determining the dimming signal to the lighting device 1 is given to the memory unit 6, and the previous delay time t
_1, in which to store the data of the detection time interval T _1, is constituted by a microcomputer. Here, after the detection signal from the human body detection sensor unit 3 disappears, the actual lighting control level of the lighting device 1 is the lighting level H (for example, in the case of manned).
The delay time t ₁ from the time when H = 75% lighting at full lighting or all lighting) to a predetermined unattended lighting level L (for example, L = 20% lighting at all lighting or extinguishing) And the time from when the detection signal from the human body detection sensor unit 3 disappears until the next detection signal is output is defined as the detection time interval T ₁ (see FIG. 3).

In the lighting control device A, the control unit 4
Receives a detection signal from the human body detection sensor unit 3, gives a predetermined command (data) to the timer unit 5 and the memory unit 6,
The timer unit 5 and the memory unit 6 perform respective processes based on the instruction and return the data of the process result to the control unit 4.
The control unit 4 provides the dimming signal output unit 2 with control data for controlling the lighting device 1 to a predetermined lighting level based on the returned data, and the dimming signal output unit 2 based on the control data. The created dimming signal is given to each lighting device 1 to perform dimming control. That is, if the person does not appear again in the detection area before the delay time t ₁ [minutes] elapses after there is no person in the detection area, the control unit 4 controls the dimming signal output unit 2
Is controlled to switch the illumination level of the illumination device 1 to the illumination level L for an unattended person.

Next, in the lighting control device A, the delay
Time t₁FIG. 4 is a flow chart showing a lighting control operation that makes variable
It will be described based on the chart. First, the initial delay time t
₁For example t₁= 600 [seconds] (S1). However
However, it goes without saying that this set value may be another value.
Nor. Then, there is no person in the detection area,
When the detection signal from the intelligent sensor unit 3 is no longer output,
The control unit 4 causes the timer unit 5 to perform the delay time t.₁Open the timed operation of
Start, delay time t₁Count down by 1 second
(S2, S3). Delay time t counted down₁The value of the
If is not zero, the control unit 4 detects from the human body detection sensor unit 3
It is determined whether or not the detection signal is input (S4), and the detection area is detected.
If there is no person in the area and no detection signal is input, the detection
Time interval T ₁Add 1 second to the value of (S5), delay time
t₁Continue the timed operation of.

If a person does not appear in the detection area by the end of the set delay time t ₁ , the control unit 4 controls the dimming signal output unit 2 when the delay time t ₁ becomes zero. The illuminance of the illuminating device 1 is lowered to the illumination level L for the unattended state (S6). Then, the time delay operation of the delay time t ₁ and the addition processing of the detection time interval T ₁ are repeated until a person appears in the detection area (S2 to S5).

Then, when a person appears in the detection area after the illumination device 1 is lowered to the illumination level L when there is no person, the control unit 4 causes the control unit 4 to store the previous detection time interval T ₁ stored in the memory unit 6. The value of 'is compared with the value of the detection time interval T ₁ which has been counted by adding processing from the time when a person is not present in the detection area to the time when a person appears (S
7) If the two values are equal, the delay time t _{1 is set} to the previous delay time t ₁ '(t ₁ = 600 [sec] in this case) as it is (S8, S9). Then, the control unit 4
Initializes the value of the detection time interval T ₁ to zero (S1
6) Set the delay time t ₁ in the timer unit 5 (S
17) Then, the illumination level of the illumination device 1 is raised to the level H in the case of a manned person (S18).

On the other hand, the detection time interval T when the human body is detected
_If the value of ₁ is smaller than the value of the previous detection time interval T ₁ ', the delay time t ₁ is set to a time longer than the previous delay time t ₁ ' (S10). At this time, it is possible to appropriately set at what ratio the length is increased. Then, the newly set delay time t ₁ is compared with the preset maximum value t _max of the delay time (S11), and if it exceeds, the delay time t ₁ is set to the maximum value t _max. (S12), if not exceeded, leave as it is. Then, the control unit 4 initializes the value of the detection time interval T ₁ to zero (S16), sets the above-described delay time t ₁ in the timer unit 5 (S17), and sets the illumination level of the illumination device 1 to the manned state. The level is raised to the level (S18).

If the detection time interval T ₁ is longer than the previous detection time interval T ₁ ', the delay time t ₁ is set to a time shorter than the previous delay time t ₁ ' (S13).
At this time, it is possible to appropriately set the rate of shortening. Then, the newly set delay time t ₁ is compared with the preset minimum value t _min of the delay time (S14), and when the delay time t ₁ is less than the minimum value t _min , the delay time t ₁ is set to the minimum value t _min (S15). ), If it is not below, leave it as it is. Then, the control unit 4 determines that the detection time interval T
The value of ₁ is initialized to zero (S16), the above-mentioned delay time t ₁ is set in the timer unit 5 (S17), and the illumination level of the illumination device 1 is increased to the level for manned persons (S1).
8).

In this embodiment, the delay time t ₁ is made proportional to the detection time interval T ₁ as shown in FIG. The maximum value t _max of the delay time t ₁ is set to 11 minutes and the minimum value t _min is set to 2 minutes. When such a condition is set, as shown in FIG. 6, the delay time t ₁ is _first set to t ₁ = 10 [minutes], and then a person appears in the detection area and the illumination level becomes manned. Lighting level H
The detection time interval T ₁ before switching to T ₁ = 30
If it is [minutes] and is longer than the previous detection time interval T ₁ ′ one time before, as described above, the next delay time t ₁ is t ₁ = 8
[Minutes], which is shorter than the current delay time t ₁ = 10 [minutes]. Similarly, the detection time interval T ₁ (= 40 [minutes) after the delay time t ₁ = 8 [minutes] has become longer than the previous detection time interval T ₁ ′ (= 30 [minutes]). As a result, the next delay time t ₁ also becomes t ₁ = 6 [minutes].
Then, as the detection time interval T ₁ becomes longer, the delay time t ₁ also becomes shorter in accordance with the proportional relationship as shown in FIG. 5, and if it becomes shorter to the minimum value t _min (= 2 [minutes]) of the delay time, it becomes shorter. I won't.

On the other hand, as shown in FIG.
t₁Is t₁= 8 [minutes] is set, and then a person is detected
It appears in the area and the lighting level is switched to the human lighting level H.
Detection time interval T before switching₁Is T₁= 25 [minutes]
, The previous detection time interval T one time before that₁Longer than
If so, as described above, the next delay time
t₁As shown in FIG.₁= 9 [minutes] this time
Delay time t₁= Longer than 8 [minutes]. Similarly, slow
Total time t₁= Detection time interval T after 9 minutes
₁(= 20 [minutes]) is the previous detection time interval T₁(= 25
(Minute)), so the next delay time
t₁T₁= 10 [minutes], which is long. And the detection time
Interval T₁Becomes shorter, the delay time t₁Is also shown in FIG.
It becomes longer according to such a proportional relationship, and the maximum value of the delay time t
_max(= 11 [minutes]) becomes longer, the longer it becomes
No The detection time interval T₁Is the last detection time interval
T ₁And the delay time t₁Change as it is
Make it not exist.

Therefore, as shown in FIG. 6, the previous detection time interval T ₁ (for example, T ₁ = 30 [minutes]) is longer than the previous detection time interval T ₁ (T ₁ = 40 [minutes]). If so, by shortening the delay time t ₁ in accordance with the difference, it is possible to shorten the time for lighting the lighting device 1 at the lighting level H of the manned person after the person is absent, thereby saving energy. . Further, when the time from switching to the unmanned illumination level L until the person appears again and the illumination level switches to the humanized illumination level H is short, that is, within the detection area many times within a short time. When people come and go, the illumination level of the illumination device 1 changes intricately, which gives the person a feeling of discomfort or discomfort. Therefore, as shown in FIG. 7, the detection time interval T ₁ (for example, T ₁ =
25 [minutes] is the previous detection time interval T ₁ (T ₁ = 20)
If it is shorter than [minutes]), the delay time t ₁ is lengthened according to the difference, so that the lighting level of the lighting device 1 changes complicatedly even in a place where people come and go as described above. Therefore, it is possible to prevent the person from feeling uncomfortable or uncomfortable.

The delay time t₁Maximum value of t_maxAnd up
Small value t_minIs not limited to the above values, any
Value (eg maximum value t_max= 60 [min] or more, minimum value t
_min= 0 [minutes]). Also, at the time of detection
Interval T₁Delay time t₁The change rate of
It is not limited to the example, for example,
You may change to. That is, the initial delay time t₁But
t₁= 9 [minutes], the detection time interval T₁Is T₁= 30
[Minutes] to T₁= 40 [minutes] longer, this delay
Time t₁Is the previous delay time t₁= 80% of 9 [minutes]
The corresponding time is shortened to 7.2 [minutes], and then the detection time interval T₁
Is T₁= 40 [min] to T₁= 50 [minutes] longer
And this delay time t₁Is the previous delay time t₁= 7.2
Shorten to 5.76 [minutes], which is equivalent to 80% of [minutes],
In addition, the detection time interval T₁Is T₁= 50 [min] to T₁=
When the time becomes 70 minutes, the delay time t₁The previous
Delay time t₁= 70% of 5.76 [minutes] 4.
Short to 0 [minutes], detection time interval T ₁Is T₁= 70 [min]
To T₁= 100 [minutes], the current delay time
t ₁Is the previous delay time t₁= Phase of 55% of 4.0 [minutes]
The corresponding detection time interval T is as short as 2.2 [minutes].₁But
T₁= 100 [min] to T₁= 110 [minutes] longer
And this delay time t₁Is the previous delay time t₁= 2.2
The delay time is shortened to 1 [minute] corresponding to 45% of [minute].
t₁The minimum value t of_minEven if it is set to 1 [minutes]
Good.

In addition to the above, FIG. 8 (a)-(f)
As shown in FIG. 5, various relations between the detection time interval T ₁ and the delay time t ₁ are conceivable, and may be appropriately selected according to the place where the illumination control system is installed. (Embodiment 2) Since the basic configuration of the illumination control device A in this embodiment is the same as that of the first embodiment, the description of the common portions will be omitted and only the characteristic portions of this embodiment will be described.

In the lighting control device A of this embodiment, the
Knowledge time interval T₁Delay time t₁Are different
Change, that is, the delay time t₁Change to
The control unit 4 delays the delay time t so that₁Set up
It has a feature in that it is determined. That is, as shown in FIG.
As described above, the control unit 4 determines that the detection time interval T₁When is reduced
Delay time t₁Detection time interval T₁Increases in proportion to
The detection time interval T ₁Delay time t
₁Detection time interval T₁Decrease exponentially with respect to
Is set. The detection time interval T₁Is reduced
Delay time t₁The value of is always the detection time interval T₁But
Delay time t when increasing₁Must be greater than or equal to
Yes. Because the detection time interval T₁Is slow when
Total time t ₁Is the detection time interval T₁When the
Delay time t₁Smaller than the value of, the detection time interval T₁But
Delay time t when lengthened₁Becomes longer, or
Detection time interval T₁Delay time t becomes shorter₁Is short
This is because the inconvenience will occur.

Here, the delay time t ₁ is set to an initial value t ₁ = 10.
If it is set to [minutes], as shown in FIG. 9, when the detection time interval T ₁ is shortened to T ₁ = 16 [minutes], the detection time interval T ₁ tends to increase. t
₁ decreases to t ₁ = 2 [minutes], and then the detection time interval T ₁
Is shortened to T ₁ = 5 [minutes], the detection time interval T ₁ tends to decrease, so that the next delay time t ₁ is t ₁ = 1.
4 [minutes], and the detection time interval T ₁ is T ₁ =
As the detection time interval T ₁ increases when the time is increased to 10 [minutes], the next delay time t ₁ is t ₁ = 5 [minutes].
Similarly, the detection time interval T ₁ is T ₁ = 2 [minutes]
As the detection time interval T ₁ decreases, the next delay time t ₁ increases to t ₁ = 17 [minutes], and the detection time interval T ₁ becomes T ₁ = 5 [minutes]. If it becomes longer, the detection time interval T ₁ tends to increase, so that the next delay time t ₁ decreases to t ₁ = 10 [minutes].

As described above, the change of the delay time t ₁ is made to have a hysteresis, and the set value of the delay time t ₁ is changed depending on whether the number of people coming in or going out increases, so that comfortable lighting with less discomfort can be obtained. Can provide the environment.
The relationship between the detection time interval T ₁ and the delay time t ₁ is not limited to the above, and various kinds can be set as appropriate as shown in FIGS. 10 (a) and 10 (b). Is. However, even in this case, the value of the delay time t ₁ when the detection time interval T ₁ is reduced, it is needless to say must delay time t ₁ value or more if always the detection time interval T ₁ is increased .

(Embodiment 3) Since the basic configuration of the illumination control apparatus A of this embodiment is the same as that of Embodiments 1 and 2, the description of the common portions will be omitted and the characteristic features of this embodiment will be described. Will be described only. In the present embodiment, instead of the detection time interval T _{1 in} the first embodiment, the lighting level of the lighting device 1 is switched to the lighting level L in the case where there is no person, and then the human body is detected next and the lighting level becomes Illumination level H
It is characterized in that the delay time t ₂ is set using the time until it is switched to (which is defined as the illumination time interval T ₂ ) (see FIG. 11).

Next, the operation of the illumination control apparatus A of this embodiment will be described with reference to the flow chart shown in FIG. First, the initial delay time t ₂ is set to, for example, t ₂ = 600 [sec] (S1 ′). However, it goes without saying that this set value may be another value. The longer stay of a person in the detection area, the detection signal from the human body sensor part 3 is not outputted, the control unit 4 to start the time limiting operation of the delay time t ₂ the timer section 5, the delay time t ₂ Is counted down by 1 second (S2 ', S3'). While the value of the counted down delay time t ₂ is larger than zero, the control unit 4 determines whether or not the detection signal is input from the human body detection sensor unit 3 (S4 ′), and the delay time t ₂ time delay operation is performed. To continue.

Set delay time t₂Until becomes zero
If no person appears in the detection area at the delay time t₂Is zero
At this time, the control unit 4 controls the dimming signal output unit 2
The illuminance of the lighting device 1 to the lighting level L in the case of unattended
(S5 '), illumination time interval T ₂Initializes the value of to zero
(S6 '), if the person is not in the detection area, a further time delay
Continue the work. Here, the delay time t₂The value of becomes zero
After that, the countdown is continued for 1 second each
It takes a value (S3 '). Delay time t₂If the value of becomes negative,
Lighting time interval T₂Add 1 to (S
7 '), delay time t until a person appears in the detection area₂Limit of
Time operation and lighting time interval T₂Repeat the addition process of
(S2'-S7 ').

Then, when a person appears in the detection area after the illumination device 1 is lowered to the illumination level L in the case of being unattended, the control unit 4 causes the control unit 4 to store the previous illumination time interval T ₂ stored in the memory unit 6. The value of 'is compared with the value of the illumination time interval T ₂ in which the addition process is performed and the time is counted from the time when the illumination level is lowered to the illumination level L when there is no person this time until a person appears ( S8 ′), if the two values are equal, the delay time t _{2 is set} to the previous delay time t ₂ ′ (in this case, t ₂ =
It is set as it is to 600 [seconds] (S9 ′, S1)
0 '). Then, the control unit 4 sets the above-mentioned delay time t ₂ in the timer unit 5 (S17 ′), and raises the illumination level of the illumination device 1 to the level for a manned person (S1).
8 ').

On the other hand, the illumination time interval T when the human body is detected
₂Is the last lighting time interval T₂Less than the value of ’
Delay time t₂Is the previous delay time t₂Is longer than
It is set to a certain time (S11 '). How much at this time
Whether to lengthen at a rate of frequency can be set appropriately as described later.
You can Then, the newly set delay time t₂When
Maximum delay time t set in advance_maxCompare with
(S12 '), maximum value t _maxDelay if exceeded
Time t₂Is the maximum value t_maxSet to (S13 '), Yue
If not, leave it as is. Then, the control unit 4
Indicates that the delay time t₂Set (S1
7 '), the lighting level of the lighting device 1 is the level in the case of manned
(S18 ').

If the illumination time interval T ₂ is longer than the previous illumination time interval T ₂ ′, the delay time t ₂ is set to a time shorter than the previous delay time t ₂ ′ (S1).
4 '). At this time, it is possible to appropriately set the rate of shortening. Then, the newly set delay time t ₂ and the preset minimum value t _{min of} the delay time
And (S15 ′), and when the value is less than the minimum value t _min , the delay time t ₂ is set to the minimum value t _min (S1
6 '), if not below, leave it as it is. Then, the control unit 4 sets the above-mentioned delay time t ₂ in the timer unit 5 (S17 '), and raises the illumination level of the illumination device 1 to the level in the case of a manned person (S18').

Here, the above delay time t₂The lighting time
Interval T₂Relative to. The delay time
t₂Maximum value of t_max= 15 [min], minimum value t_min= 2
Each is set to [minutes]. I set the conditions like this
In this case, as shown in FIG.₂Is t₂
= 10 [minutes], and then the person is in the detection area
It appears and the lighting level switches to the manned lighting level H.
Lighting time interval T₂Is T₁= 20 [minutes]
Last lighting time interval T one time before₂Become longer than
If so, as described above, the next delay time t
₂Is t₂= 8 [minutes], and this delay time t₂= 1
It becomes shorter than 0 [minutes]. Similarly, the delay time t ₂= 8
Lighting time interval T after [minutes] has elapsed₂(= 30
[Minutes]) is the previous lighting time interval T₂’(= 20 [min])
Since it is longer than, the next delay time t₂T
₂= 6 [minutes]. And the illumination time interval T₂Is long
Delay time t₂Becomes shorter, and the minimum delay time
Value t_min(= 2 [minutes]) Shorter is shorter
I won't.

On the other hand, as shown in FIG. 14, first, the delay time t ₂ is set to t ₂ = 10 [minutes], and then a person appears in the detection area and the illumination level is the human illumination level H. The illumination time interval T ₂ before switching to T ₂ = 20 [min]
However, if it is shorter than the previous lighting time interval T ₂ 'one time before that, as described above, the next delay time t ₂ becomes t ₂ = 11 [minutes] of this time. The delay time becomes longer than t ₂ = 10 [minutes]. Similarly, the illumination time interval T after the delay time t ₂ = 11 [minutes] has elapsed
₂ (= 15 [minutes]) is the previous illumination time interval T ₂ '(= 2
Since it is shorter than 0 [minutes], the next delay time t ₂ also becomes long as t ₂ = 13 [minutes]. Then, the delay time t ₂ becomes longer as the illumination time interval T ₂ becomes shorter, and it does not become longer if it reaches the maximum value t _max (= 15 [minutes]) of the delay time. The illumination time interval T
_{If 2} is the same as the previous illumination time interval T ₂ , the delay time t ₂ is not changed.

Therefore, as shown in FIG. 13, the illumination time interval T ₂ before _two times (for example, T ₂ = 20 [minutes]) is longer than the previous illumination time interval T ₂ (T ₂ = 30 [minutes]). If so, by shortening the delay time t ₂ in accordance with the difference, it is possible to shorten the time for lighting the lighting device 1 at the lighting level H of the manned person after the person is absent, thereby saving energy. . Further, when the time from switching to the unmanned illumination level L until the person appears again and the illumination level switches to the humanized illumination level H is short, that is, within the detection area many times within a short time. When people come and go, the illumination level of the illumination device 1 changes intricately, which gives the person a feeling of discomfort or discomfort. Therefore, FIG.
As shown in, the lighting time interval T ₂ of the second last (eg, T
₂ = 20 [minutes] is the previous illumination time interval T ₂ (T ₂ = 1)
If it is shorter than 5 [minutes], the delay level t ₂ is lengthened according to the difference, so that the lighting level of the lighting device 1 is complicatedly changed even in a place where people come and go as described above. Can be suppressed, and it is possible to prevent a person from feeling uncomfortable or uncomfortable.

The maximum value t _max and the minimum value t _min of the delay time t ₂ are not limited to the above values, but may be any value (for example, the maximum value t _max = 60 [minutes] or more and the minimum value t
_min = 0 (minutes)) may be appropriately set. Further, the rate of change of the delay time t ₂ with respect to the illumination time interval T ₂ is not limited to that in this embodiment, and may be set appropriately.

(Embodiment 4) The illumination control apparatus A of the present embodiment
Since the basic configuration is the same as that of the first to third embodiments,
The description of the parts that pass through is omitted, and the parts that characterize the present embodiment
Will be described only. This embodiment is as shown in FIG.
And the delay time t₁If the value increases, as in Example 1.
Detection time interval T₁Delay time t₁The set
And delay time t₁In the case of decreasing
Lighting time interval T₂Delay time t₁Set
Or, as shown in FIG. 16, the delay is the reverse of the above.
Time t₁If the lighting time increases, as in Example 3, the lighting time
Interval T₂Delay time t ₁Set the delay time
Interval t₁In case of decrease in
Interval T ₁Delay time t₁Specially set
It is a characteristic.

As in the second embodiment, the change in the delay time t ₁ may have hysteresis. Again, the value of the delay time t ₁ when the detection time interval T ₁ or the illumination time interval T ₂ is decreased, the delay time t ₁ when the always detected time interval T ₁ or the illumination time interval T ₂ increases Must be greater than or equal to the value. (Embodiment 5) Since the basic configuration of the illumination control apparatus A of the present embodiment is the same as that of the embodiment 1, the description of the common portions will be omitted and only the characteristic portions of the present embodiment will be described.

In this embodiment, as shown in FIG. 17, the illumination level of the illumination device 1 within the delay time t ₁ (or t ₂ ) is not fixed to the human illumination level H, but the delay time t
Within ₁ (or t ₂ ), the lighting level H of the manned is faded to the lighting level L of the unmanned, that is, the lighting level is changed at a predetermined rate. That is, the control unit 4 controls the delay time t ₁ (or t
_When the timed operation of ₂ ) starts, data for changing the illumination level according to a predetermined change rate set in advance is sent to the dimming signal output unit 2, and each lighting device 1 is adjusted by the dimming signal output unit 2. It is light controlled.

For example, as shown in FIG. 18A, the delay time t ₁ is changed in proportion to the time limit, or as shown in FIG. 18B, the delay time t _{1 is changed to} the time limit time. On the other hand, the illumination level can be changed exponentially or at any other rate of change (see (c) to (f) in FIG. 19 and (a) to (h) in FIG. 19). According to the above configuration, by fading the illumination level within the delay time t ₁ , it is possible to reduce the power consumption of the illumination device 1 due to the illumination during the delay time t ₁ and save energy. .

[0044]

As described above, the present invention is a lighting control device for turning on / off the dimmable lighting means and controlling the dimming, which is a human body detecting means for outputting a detection signal when a human body is detected. And while the detection signal is being output
The illumination means is controlled so as to switch to the illumination of the second illumination level for unmanned with an illuminance lower than the first illumination level after a lapse of a predetermined delay time after the detection signal disappears. The control means and the timer means for measuring the detection time interval from when the detection signal is output to when the detection signal is no longer output and the detection signal is output again are provided. The delay time of this time is set according to the difference with the detection time interval of, or the illumination time interval from the switching to the second illumination level by the timer means until the detection signal is output next time. By setting the delay time this time according to the difference between the previous lighting time interval and the lighting time interval two times before, the delay time for each time can be set according to the frequency of people going in and out. As a result, it is possible to reduce power consumption due to lighting to save energy, and to reduce the discomfort and discomfort caused to a person by changing the lighting level, thereby providing a comfortable lighting environment. .

By setting the upper limit value and the lower limit value for the delay time, it is possible to prevent the delay time from becoming longer or shorter than necessary. Furthermore, add hysteresis to the delay time setting,
By changing the set value of the delay time depending on whether the number of people coming in or going out increases or decreases, it is possible to provide a comfortable lighting environment with less discomfort.

By fading the illumination level when switching between the first illumination level and the second illumination level, it is possible to reduce the power consumption by the illumination during the delay time and save energy. There is.

[Brief description of drawings]

FIG. 1 is a schematic block diagram showing a first embodiment.

FIG. 2 is a waveform diagram showing a human body detection signal of the above.

FIG. 3 is an explanatory diagram illustrating an operation of the above.

FIG. 4 is a flowchart illustrating an operation of the above.

FIG. 5 is a diagram showing a relationship between the delay time t ₁ and the detection time interval T ₁ in the above.

FIG. 6 is an explanatory diagram illustrating an operation of the above.

FIG. 7 is an explanatory diagram illustrating an operation of the above.

8A to 8F are diagrams showing the relationship between the delay time t ₁ and the detection time interval T ₁ in the above.

FIG. 9 is a diagram showing a relationship between a delay time t ₁ and a detection time interval T ₁ in the second embodiment.

10A and 10B are diagrams showing the relationship between the delay time t ₁ and the detection time interval T ₁ in the above.

FIG. 11 is an explanatory diagram illustrating an operation of the third embodiment.

FIG. 12 is a flowchart illustrating the same operation as above.

FIG. 13 is an explanatory diagram illustrating an operation of the above.

FIG. 14 is an explanatory diagram illustrating an operation of the above.

15A and 15B are delay times t _{1 of the} fourth embodiment.
It is a diagram showing a relationship between the detection time interval T ₁ and.

16 (a) and 16 (b) are diagrams showing another relationship between the delay time t ₁ and the detection time interval T ₁ in the above.

FIG. 17 is an explanatory diagram illustrating an operation of the fifth embodiment.

FIG. 18 is an explanatory diagram illustrating an operation of the above.

FIG. 19 is an explanatory diagram illustrating an operation of the above.

[Explanation of symbols]

 A lighting control device 1 lighting device 2 dimming signal output unit 3 human body detection sensor unit 4 control unit 5 timer unit 6 memory unit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Rei Horiguchi 1048 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Works Co., Ltd.

Claims (6)

[Claims] 1. A lighting control device for turning on / off a dimmable lighting means and controlling dimming, comprising: a human body detection means for outputting a detection signal when a human body is detected; and a detection signal output. While the person is illuminating, the illumination for the first illumination level for the manned person is performed, and after a predetermined delay time elapses after the detection signal disappears, the second for the unmanned person having an illuminance lower than the first illumination level
Control means for controlling the illuminating means so as to switch to the illuminating level of the illuminating level, and a timer means for measuring the detecting time interval from the output of the detecting signal to the disappearance of the detecting signal once and the outputting of the detecting signal again. An illumination control device, comprising: and a control unit that sets a current delay time according to a difference between a previous detection time interval and a two-preceding detection time interval. 2. A lighting control device for performing lighting control, lighting control, and dimming control of a dimmable lighting means, comprising: a human body detection means for outputting a detection signal when a human body is detected; and a detection signal output. While the person is illuminating, the illumination for the first illumination level for the manned person is performed, and after a predetermined delay time elapses after the detection signal disappears, the second for the unmanned person having an illuminance lower than the first illumination level
Control means for controlling the lighting means so as to switch to the lighting of the other lighting level, and timer means for measuring the lighting time interval from the switching to the second lighting level until the next detection signal is output. The lighting control device is characterized in that the control means sets the delay time of this time in accordance with the difference between the lighting time interval of the previous time and the lighting time interval of the two times before. 3. The lighting control device according to claim 1, wherein the control unit sets the delay time so that the delay time does not exceed a predetermined upper limit value. 4. The lighting control device according to claim 1, wherein the control unit sets the delay time so that the delay time does not fall below a predetermined lower limit value. 5. The lighting control device according to claim 1, wherein the control means sets the delay time so as to have a hysteresis. 6. The control means controls the lighting means so as to fade the lighting level when switching between the first lighting level and the second lighting level. The lighting control device described.