JPH09312198A - Lighting control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the power consumption of lighting, and realize the appropriate visual environment by estimating the luminous distribution inside of a room to be changed with an elapse of time with a change of the natural lighting condition, and performing fine control of artificial lighting. SOLUTION: On the basis of a detection value of a light intensity detecting means 3, a room-inside luminous distribution estimating unit 6 estimates the room-inside distribution condition. At this stage, in the case where a small number of optical intensity detecting means 3 is arranged, the room-inside luminous distribution estimating unit 6 estimates the room-inside luminous distribution condition. In the case where a detection range of the light intensity detecting means 3 is set in a wide range, room-inside luminous distribution condition is estimated. When the room-inside luminous distribution condition is estimated, a controlled variable deciding unit compares an output value of the room-inside luminous distribution estimating unit 6 with a target luminous distribution value of a target luminous distribution setting unit 5, and decides a controlled variable of the lighting condition of each luminaire 1. Each lighting control device 2 controls dimming operation and luminous intensity distribution of each luminaire 1 on the basis of the decided controlled variable.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting control system for always maintaining a target illuminance distribution state in a room and realizing a comfortable power-saving lighting space.

[0002]

2. Description of the Related Art FIG. 14 shows an example of a conventional lighting control system according to the present invention.
No. 91 publication. The system shown in the figure includes a main operation panel 31, a signal generation terminal device 35 connected to the main operation panel via a transmission line 32, and a dimming lighting device 36 connected to the signal generation terminal device via another transmission line 33. Etc. A daylight sensor 37, an upper limit setting device 38 and a lower limit setting device 39 configured by a variable resistor are connected to the signal generating terminal device. A lighting power supply is supplied to each on / off terminal device 34, and this lighting power supply is supplied to each dimming lighting fixture via the on / off terminal device.

According to the present invention, by rewriting the contents of the ROM, that is, the allocation table memory according to the installation environment of the illumination control system, it becomes possible to perform appropriate illuminance control according to the installation environment of the lighting fixture, and particularly It is said that the daylight sensor control of window lighting, which has significantly different illuminance characteristics depending on each location, is performed extremely accurately, and the habitability of offices and the visual environment can be greatly improved.

In recent years, for example, Japanese Patent Laid-Open No. 7-4537.
An illumination control system using an image pickup system as shown in FIG. According to this proposal, this system has an imaging means for detecting image information of at least one of color and brightness of the illumination space, and performs arithmetic processing on the image information obtained by this means to control the lighting state of the luminaire. As a result, the multifunctional lighting environment can be automatically controlled and finely tuned, and it is possible to reduce initial costs and maintenance costs without having to install many sensors.

[0005]

However, in a system such as that disclosed in Japanese Patent Laid-Open No. 64-86491, a daylight sensor is usually installed on the window side and only the average illuminance value of an area having a radius of several meters is displayed. In addition, since it was not installed densely in the room, it was not possible to obtain an accurate illuminance distribution in the room.For example, the brightness distribution produced by the blind up / down state of the office window surface or the open / closed state There was a problem that I could not get it. In addition, the dimming control of the lighting fixtures is controlled by the block for each of several fixtures according to the table, so there is a limit to the width of the illuminance distribution control, and for example, efficient lighting control that distinguishes the non-working surface and the working surface is possible. There was also a problem that I could not do it. Therefore, it cannot be said that the lighting environment control is not necessarily satisfactory in terms of workability, comfort, and energy consumption.

The device disclosed in Japanese Patent Application Laid-Open No. 7-45370 certainly has the effect of reducing the number of sensors. However, regarding the sensor, the details of the sensor's characteristics and specifications such as its sensing method, mounting position, usage conditions, etc. are not described, and no specific control method using such information is presented, so its system configuration. There was a problem that the actual lighting space could not be controlled to the target space by itself.

The object of the present invention is made in view of such a problem, and by estimating the illuminance distribution in the room, which temporally changes due to the change of the external light state, and performing the artificial lighting control finely, An object of the present invention is to provide a lighting control system that can reduce power consumption and realize a suitable visual environment.

[0008]

A lighting control system according to the present invention is a lighting fixture that illuminates an illumination space, a lighting control device that changes a lighting state of the lighting fixture according to a control signal, and a lighting control device in the lighting space. A single or a plurality of light intensity detecting means for detecting the intensity of light, a target illuminance distribution setting unit for setting a target illuminance distribution value on an arbitrary plane in the illumination space, and a detection value of the light intensity detecting means. Based on this, the indoor illuminance distribution estimation unit that estimates the illuminance distribution state on the arbitrary plane in the illumination space, the estimated value of the indoor illuminance distribution estimation unit, and the target illuminance distribution value set by the target illuminance distribution setting unit And a control amount determination unit for inputting a control signal to the lighting control device.

Further, a window surface light intensity detecting means for detecting the intensity of the light on the window surface where external light is incident on the illumination space, and a lamp characteristic holding section for holding the basic lamp characteristic of the light source lamp of the lighting fixture are provided. In addition, the indoor illuminance distribution estimation unit has an artificial light illuminance distribution that estimates the illuminance distribution state based on only the illumination light of the lighting fixture based on the control signal of the control amount determination unit and the basic lamp characteristic of the lamp characteristic holding unit. An estimation unit and an external light illuminance distribution estimation unit that estimates an illuminance distribution state by only external light based on a detection value of the window light intensity detection unit.

Further, the control amount determining unit determines whether the target illuminance distribution value on a certain plane set by the target illuminance distribution state setting unit is within an area corresponding to a lighting fixture installation interval including points directly under each lighting fixture. Calculating an average target illuminance value of the, comparing the calculated average target illuminance value and the average estimated illuminance value in the same area obtained in the outside light illuminance distribution estimation unit,
When the calculated value is low, control is performed so that the dimming level of the luminaire above the area is maintained to be lit at a low level output so that the light source lamp does not flicker.

Further, the window surface light intensity distribution detecting means is a window surface imaging means for detecting image information of the window surface.

Further, a window surface illuminance detecting means for detecting the illuminance near the window surface is provided, and the window surface imaging means automatically determines a dynamic range of its own light amount according to the output of the window surface illuminance detecting means. To adjust.

Further, the outside light illuminance distribution estimating unit is based on window surface image information previously obtained by the window image capturing means and window surface image information obtained by previously capturing an image from an arbitrary plane in the illumination space. It has a window surface luminance distribution conversion section for converting the window surface image information obtained by the window surface image pickup means into the window surface image information of the arbitrary plane.

Further, it has an indoor space imaging means for imaging the illumination space, and a non-work area estimation unit for estimating a non-work area of the illumination space based on image information of the indoor space imaging means, and the control amount. The determination unit determines the control amount based on the estimated value of the indoor illuminance distribution estimation unit, the information of the non-work area estimation unit, and the target illuminance distribution value of the non-work area set in the target illuminance distribution setting unit. Is.

Further, the target illuminance distribution value of the non-work area is set to be equal to or less than the average value of the target illuminance distribution value of the work area.

The control amount further includes a human body detecting means for detecting a human body in the illumination space, and an absent area estimating section for estimating an absent area in the illumination space based on human body detection information of the human body detecting means. The determining unit determines the control amount based on the estimated value of the indoor illuminance distribution estimating unit, the information of the absent area estimating unit, and the target illuminance distribution value of the absent area set in the target illuminance distribution setting unit. is there.

Further, the target illuminance distribution value of the absent area is set to be equal to or less than the average value of the target illuminance distribution value of the existing area.

Further, the human body detecting means is an infrared detecting means for detecting infrared rays.

Further, a human body detection means for detecting a human body in the illumination space, an absent area estimation unit for estimating an absent area of the illumination space based on human body detection information of the human body detection means, and a room for imaging the illumination space The control amount determining unit includes a spatial imaging unit and a non-working area estimating unit that estimates a non-working area of the illumination space based on image information of the indoor space imaging unit, and the control amount determining unit estimates the indoor illuminance distribution estimating unit. Value, information of the absent area estimation unit, information of the non-work area estimation unit and the control amount is determined based on the target illuminance distribution value of the non-work area and the absent area set in the target illuminance distribution setting unit, The target illuminance distribution value of the absent area is less than or equal to the average value of the target illuminance distribution value of the existing area, and the target illuminance distribution value of the non-work area is less than or equal to the average value of the target illuminance distribution value of the work area. Further non-working area target luminance setting value is one that is set below absent area target luminance setting value.

Further, at least one of the absent area information of the absent area estimation section, the non-work area information of the non-work area estimation section, and the illuminance distribution information estimated by the illuminance distribution estimation section is output to an external device. The spatial information output unit is provided.

Furthermore, an optical data correction unit for removing the influence of image distortion, brightness distortion, etc. due to optical characteristics of a lens used in the window surface image pickup means or the indoor space image pickup means is provided.

Further, the abnormal lighting state detecting means for detecting an abnormality in the lighting state of each light source lamp of each lighting fixture and the abnormal information from the abnormal lighting state detecting means are used to identify the light source lamp in the abnormal state. And an abnormality information display section for displaying abnormality information.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1. 1 is a block diagram showing a basic configuration of a system according to a first embodiment of the present invention. In FIG. 1, 1 is a lighting fixture, and 2 is a lighting device 1 such as a luminous flux and a light distribution according to a control signal. The variable lighting control device 3 is a light intensity detecting means such as a single or plural illuminance meter installed in one or both of the indoor space and the outdoor space. Reference numeral 4 denotes a main control device that calculates a control signal to be output to the lighting control device 2 based on the information of the light intensity detection means 3, and includes a target illuminance distribution setting unit 5 and an indoor illuminance distribution estimation unit 6.
And a control amount determination unit 7.

The target illuminance distribution setting unit 5 sets a target illuminance distribution value on an arbitrary plane in the indoor space. Further, the indoor illuminance distribution estimation unit 6 estimates the indoor illuminance distribution state based on each output value of the light intensity detection means 3. At this time, if the number of installed light intensity detecting means 3 is small, it is generally difficult to accurately estimate the illuminance distribution. Therefore, it is preferable to install as many light intensity detecting means 3 as possible. However, it may not be possible to install a large number of light intensity detecting means 3 in terms of installation space and cost. Therefore, in such a case, an approximate illuminance distribution corresponding to the output level of the light intensity detecting means 3 is stored in advance in the indoor illuminance distribution estimating section 6 as data or a mathematical expression, and By referring to this data or the mathematical formula according to the detected value, it is possible to roughly estimate the illuminance distribution.

Even when a large number of light intensity detecting means 3 are evenly arranged, accurate illuminance distribution estimation is possible when the detection range of each light intensity detecting means 3 is narrow. Have difficulty. Therefore, in such a case, the indoor illuminance distribution estimating unit 6 spatially interpolates the detection values of the respective light intensity detecting means 3 to enable accurate illuminance distribution estimation. On the contrary, when the detection range of the light intensity detecting means 3 is wide, the detection ranges of the respective light intensity detecting means 3 overlap with each other, which may make accurate illuminance distribution estimation difficult. Therefore, even in such a case, accurate illuminance distribution estimation can be performed by performing spatial interpolation in consideration of the influence of overlap. The control amount determination unit 7 outputs the output value of the indoor illuminance distribution estimation unit 6 and the target illuminance distribution setting unit 5
The target illuminance distribution value is compared and the control amount of the illumination state of each luminaire 1 is determined based on this.

In the first embodiment configured as described above, the indoor illuminance distribution estimation unit 6 estimates the indoor illuminance distribution state based on the detection value of the light intensity detecting means 3. At this time, when the number of installed light intensity detecting means 3 is small, the indoor illuminance distribution estimation unit 6 estimates the indoor illuminance distribution state based on the data or mathematical formulas that are held in advance, as described above. . Further, when the detection range of the light intensity detecting means 3 is wide or narrow, the spatial illuminance distribution is estimated as described above to estimate the indoor illuminance distribution state. When the indoor illuminance distribution estimating unit 6 estimates the indoor illuminance distribution state as described above, the control amount determining unit 7 outputs the output value of the indoor illuminance distribution estimating unit 6 and the target illuminance distribution value of the target illuminance distribution setting unit 5. And the control amount of the illumination state of each lighting fixture 1 is determined based on this. Then, when the control amount is determined by the control amount determination unit 7, each lighting control device 2 performs the dimming control and the light distribution control of each lighting fixture 1 based on the determined control amount.

As described above, in the first embodiment, the indoor illuminance distribution estimation unit 6 is provided to estimate the indoor illuminance distribution, so that the temporal daylight amount fluctuation such as the solar position fluctuation or the weather change can be achieved. The resulting change in the brightness state of the indoor space can be understood as a change in distribution rather than a change in the average brightness of a few square meters area as in the conventional example. Further, it is possible to recognize the distribution of the brightness of the indoor space corresponding to the ascending / descending or opening / closing state of the blind provided on the window surface. Therefore, for example, there is an advantage that the difference in brightness between the periphery of the portion where the blind is lowered and the periphery of the portion where the blind is not lowered can be recognized as a difference in the illuminance value.

Further, by estimating the illuminance distribution in the room, it is possible to control the luminaire 1 in units of one luminaire or in units of lamps in each luminaire, instead of in blocks of several luminaires. Therefore, the illumination state can be controlled in a fairly narrow range, and the target illuminance distribution value can be accurately controlled.

In the first embodiment, the illuminance meter for detecting the illuminance has been described as an example of the light intensity detecting means 3, but the present invention is not limited to this and, for example, the case of brightness. There is no particular limitation as long as it is a device that can detect a physical quantity related to the intensity and quantity of light and that can finally estimate the illuminance distribution from the physical quantity. For example, as another example of the light intensity detection means 3, an imaging type detection means such as a camera can be used. In this case, it is not possible to directly obtain the illuminance value or the illuminance distribution at a certain point in the room, but since it is possible to obtain the indoor brightness distribution information, it is possible to convert the brightness and the illuminance according to the reflectance of the imaged object in advance. By setting the method, the illuminance distribution can be estimated.

Embodiment 2 FIG. 2 is a block diagram showing the basic configuration of the system according to the second embodiment of the present invention.
The same parts as those shown in FIG. In the indoor illuminance distribution estimation unit 6 of the first embodiment, external light (light entering the room through a window or the like) and artificial light (light from a lighting device installed in the room) are realized by both without distinction. The case of estimating the illuminance distribution has been described. However, in the second embodiment, the artificial light illuminance distribution estimating unit 10 and the external light illuminance distribution estimating unit 11 are provided in the indoor illuminance distribution estimating unit 6, and the illuminance by the artificial light and the illuminance by the external light are respectively output according to the output of the light intensity detecting means. The distribution is estimated individually.

In the figure, reference numeral 10 is an artificial light illuminance distribution estimating section, and 11 is an external light illuminance distribution estimating section, and their functions will be described later. Reference numeral 12 is a lamp characteristic holding unit that holds lamp characteristics such as light source lamp light distribution characteristics and range characteristics of the lighting equipment used in the present system as data, and 13 is a window surface light intensity distribution detecting means for detecting the light intensity distribution on the window surface. Is. Hereinafter, a specific method of estimating the illuminance distributions of the artificial light and the external light in the artificial light illuminance distribution estimation unit 10 and the external light illuminance distribution estimation unit 11 will be described.

First, an example of the estimation method of the artificial light illuminance distribution estimation unit 10 will be described. Here, a simple case where only the dimming control is targeted as a control target of the lighting fixture 1, that is, a case where the control amount determined by the control amount determination unit 7 is only the dimming level of each lighting fixture 1 will be described. . The artificial light illuminance distribution estimation method shown here basically uses information such as the dimming level of each luminaire 1 and the light distribution characteristics and range characteristics obtained from the lamp characteristic holding section 12 to calculate the illuminance distribution of the artificial light. It is an estimation.

Here, the relationship between the dimming level for each lighting fixture 1 and the light distribution amount of each lighting fixture 1 will be described. Under the assumption that the dimming control affects only the luminous flux of the lamp, and that there is almost no change in the luminous intensity distribution in each direction with respect to the total luminous flux during dimming, The light distribution amount can be approximated by multiplying the light distribution amount at 100% lighting by a coefficient of 1 or less. It should be noted that this coefficient may be referred to according to the dimming level after previously examining the relationship between the dimming level and the total luminous flux. From the above, the light distribution amount of each lighting fixture can be known from the dimming level of each lighting fixture 1. If the light distribution of each luminaire is known, the size of the room, the position of the installation, and the position of the luminaire 1 are generally fixed, so that the illuminance distribution in the room can be uniquely determined. is there.

That is, the illuminance distribution estimated value by the artificial light can be obtained from the spatial conditions such as the light distribution amount and the size of the lighting fixture of each lighting fixture 1 by a calculation method used in the conventional lighting design, for example. As a calculation method at this time, a simple or strict calculation method with respect to the required accuracy may be appropriately selected and used. Although only the dimming control has been described here, the correspondence between the control level and each physical quantity is similarly clarified in the case of performing the light distribution control, the lighting fixture position control, or the control combining them. This makes it possible to estimate the indoor illuminance distribution.

Next, an example of a configuration and an estimation method for estimating the external light illuminance distribution will be described. The ambient light illuminance distribution estimation is performed by the ambient light illuminance distribution estimation unit 11 based on the detection value obtained by detecting the light intensity distribution on the window surface by the window light intensity distribution detection means 13. Here, the reason why the external light illuminance distribution can be estimated by the detected value of the light intensity distribution on the window surface will be described. The basic idea of lighting calculation is that if you know the conditions such as the size of the light entrance surface such as the room to be illuminated or the window, and the intensity distribution of the amount of light received on the light entrance surface, the light entrance surface should be regarded as a large lighting fixture. By thinking, the illuminance value at a certain point in the room can be known by calculation. Therefore, when estimating the illuminance distribution due to only outside light in an indoor space such as an office, the conditions of the size of the indoor space and the size and position of the window surface to be calculated are known. If the light intensity distribution detecting means 13 can detect the light intensity distribution on the window surface, it is possible to estimate the indoor illuminance distribution by the outside light.

In the present embodiment, as an example of the window surface light intensity distribution detecting means 13, a case will be described in which a window surface image pickup means capable of picking up an image of the window surface and detecting information corresponding to the brightness distribution is used. As a specific example of the window surface image pickup means, a camera using an image pickup device such as a CCD (electronic image pickup device) can be cited. In this case, the signal of the device can be replaced with the brightness information by grasping the relationship between the signal output level of the image sensor and the actual brightness value in advance as data or a relational expression.

Here, a method of obtaining the illuminance value from the brightness value obtained by the window image pickup means will be described with reference to FIG. In FIG. 3, P is an arbitrary work point on the work surface,
15 is the window surface, Ed is the illuminance value in the direction perpendicular to the work plane at point P, Lw is the brightness value when the small surface dSw of the window surface is seen from point P, r is the distance between dSw and point P, i is the angle between the Ed vector and the negative direction of the Lw vector, and j is d
The angle between the surface vector n of Sw and the Lw vector is shown. The relationship between the brightness value Lw and the illuminance value Ed can be obtained based on the formula (1) described in Reference Document 1 (Writing Handbook / Lighting Society of Japan / Ohmsha / 1987), for example.

[0038]

[Equation 1]

Here, the distance r shown in the equation (1),
The angles i and j and the minute surface dSw are obtained by actual measurement. Therefore, if the window surface 15 is imaged from the point where the illuminance is desired to be obtained and the brightness value Lw is obtained, the illuminance value Ed can be obtained by substituting the brightness value Lw into the equation (1).

As described above, the illuminance distributions due to the artificial light and the external light can be obtained. By considering the effect of the external light and the effect of the artificial light in this way,
The ratio of contribution of external light and artificial light to the illuminance distribution becomes clear for each position in the room. Since the illuminance value of outside light at each position in the room is known, the illuminance by artificial lighting that should be set with respect to the target value at each position becomes clear, and as a result, it is easy to perform lighting control to obtain the target illuminance distribution. There is an effect that.

Further, by separately considering the effect of the external light and the effect of the artificial light, the illumination control of the artificial light can be performed more precisely and the visual environment can be further improved. Hereinafter, an example of a control method for improving such a visual environment will be described. When the plane for which the illuminance distribution is to be estimated is, for example, an office work surface (0.7 (m) on the floor), and when there is a large amount of external light such as in fine weather, the estimated external light illuminance value within that plane is the target illuminance value. May occur. In such a case, it is useless in terms of power consumption to perform light distribution to that portion with a lighting fixture. However, if you turn off only a part of the indoor lighting fixtures focusing only on the power consumption aspect, the unevenness of the luminance distribution on the ceiling surface will become large, which may worsen the visual environment of the office work surface and cause discomfort to people. Absent.

FIG. 4 is an explanatory view for explaining the control method in such a case, FIG. 4 (a) is a plan view of the illuminated room, and FIG. 4 (b) is a side view of the illuminated room. In the figure, 1
Reference numeral 4 denotes a room to be illuminated, 15 a window surface, 16 a work desk, and 17 a work surface including the upper surface of the work desk. First, from a target illuminance distribution on a certain plane (here, the work surface 17) set by the target illuminance distribution state setting unit 4, a circular area having a certain area including a point directly below the luminaire determined by each luminaire installation interval. The average target illuminance value in 18 is calculated. For example,
In the example shown in FIG. 4, since the installation interval of the lighting fixture 1 is constant regardless of the room direction, a circular area around the point q, which is a point directly below the lighting fixture, may be considered. The area of this circular area may be a circle having a radius of half the installation interval (x in the figure) of each lighting fixture 1.

Although the size of this area is not specified, generally in the case of an office, the standard can be set as follows. In general, the distance between the luminaires installed in the office (x in the figure) is often about 1.5 (m), so it is considered that one luminaire greatly contributes to the illuminance value. A circle of (m), that is, a circle having an area of about 2 (m ² ) centering on a point directly below the device may be used. The area of this circle may be constant regardless of the room height. As described above, when the average target illuminance value in the circular area 18 is obtained, next, the obtained average target illuminance value and the average estimation in the same area on the same plane obtained by the external light illuminance distribution estimation unit 11 are estimated. Compare with the illuminance value.
As a result, when the average target illuminance value is lower than the average estimated illuminance value, the lighting fixture on the center of the circular surface is not turned off, and the dimming level is controlled to be maintained at a constant low output level. To do so.

The low level referred to here is about 10 (%) light emission with respect to the total luminous flux emission that can reliably eliminate the flicker caused by the dimming circuit, and is near the limit where the illumination lamp does not flicker. It is desirable to do. By performing the above control, it is possible to maintain a comfortable viewing environment and significantly reduce the illumination power. In the present embodiment, as an example of the window surface image pickup means 13, a camera using an image pickup device such as a CCD (electronic image pickup device) is shown, but in recent years, this image pickup device and image pickup using this device are shown. Since the miniaturization of the system is progressing, by using such a camera or the like, it becomes possible to realize a centralized and compact light intensity detecting means of a type completely different from the conventional daylight sensor.

When a window surface image pickup means is used as an example of the window surface light intensity distribution detection means 13, the lens to be incorporated in the image pickup system is spatially wide by appropriately selecting it according to the situation of use. It is possible to collect range information at once. Therefore, even if the window surface occupies a considerably large area spatially, it is possible to image the surface with a small number of image pickup means, and there is an advantage that the external light illuminance distribution can be estimated even in a wide space. For example, in the case of an office of a large-scale building where the window surface is wide and wide in space, a short-focus wide-angle object such as a fisheye lens can be used to find the luminance distribution over a considerably wide field of view.

On the other hand, in the case of applying a lens not so wide-angled to image pickup in a wide space as described above, a plurality of image pickup systems are required. Even in that case, the image pickup range of each image pickup device is determined, If the outside light illuminance distribution estimation unit 11 handles the data of each image pickup device in an integrated manner, the illuminance distribution can be estimated. Further, by adding a mechanism capable of controlling the imaging position and the imaging direction of the imaging device, the imaging range can be expanded with a small number of imaging devices, and at the same time, the spatial illumination control range can be expanded.

The outside light illuminance distribution estimation unit 11 estimates the brightness distribution and the luminous flux divergence distribution on the window surface based on the output value of the window surface light intensity distribution detection means 13, and based on the results, the indoor It has been shown that the illuminance distribution is estimated using only external light.
At this time, the number of window light intensity distribution detecting means 13, the installation positions,
The condition of the detected physical quantity is not particularly limited as long as it can know the intensity of external light incident from the window surface.

Embodiment 3 In general, if the illumination lamp is abnormal, the illuminance distribution in the illumination space changes and the comfort of the visual environment is often impaired. The third embodiment is for eliminating such a state. FIG.
3 is a block diagram showing a system configuration of the third embodiment, and the same portions as those in FIG. 2 are designated by the same reference numerals. In the present embodiment, as shown in FIG. 5, an abnormal lighting detection means 8 for detecting an abnormality in the lighting state of each light source lamp included in each lighting fixture in FIG. 2 and an abnormal lighting detection means 8 are provided. An abnormality information display means 9 is provided for receiving abnormality information, identifying the lamp, and displaying the abnormality information.

There are various phenomena relating to abnormal lighting of the lamp, and in the case of a fluorescent lamp, for example, there may be a phenomenon of flickering of light or a phenomenon of so-called ball breakage. Such a phenomenon is often caused by filament deterioration, and it is known that the lamp voltage suddenly rises in this case. Therefore, if the abnormal lighting detection means 8 is provided in the lighting control device as shown in FIG. 5 and the fluorescent lamp voltage is detected, the lamp abnormality can be recognized from the rate of increase of the lamp voltage. It can be used as information for reporting an abnormality. Therefore, by reporting this abnormality information to the system administrator or the person in the room through the abnormality information display means 9, it is possible to quickly respond to a sudden lamp abnormality. The abnormality information display means 9 may basically be installed at any place where the system administrator can recognize the information.

As described above, in the third embodiment, the phenomenon relating to the abnormal lighting of the lamp can be recognized at an early stage, so that the abnormal lighting state of the lamp starts to affect the estimation of the spatial illuminance distribution. You can know early.
In FIG. 5, the abnormal lighting detection means 8 is included in the lighting control device 2 that constitutes the lighting control system, but the abnormal lighting detection means 8 is basically included in any of the system components. May be.

Embodiment 4 FIG. 6 is a block diagram showing the basic configuration of the system according to the fourth embodiment of the present invention.
The same parts as those shown in FIG. 5 are designated by the same reference numerals. The brightness distribution value of the window surface detected by the window surface imaging means described in the third embodiment is a value when the window surface is imaged from the place where the window surface imaging means is installed. On the other hand, in order to obtain an accurate illuminance distribution value in the indoor space, it is necessary to obtain the luminance value when the window surface is imaged from the point (for example, the working point) where the illuminance value is desired to be obtained as described in FIG. 3 of the second embodiment. Become. Therefore, when it is desired to recognize the accurate illuminance distribution at a certain point in the indoor space, the brightness value when the window surface is imaged from the place where the window surface image pickup unit is installed is calculated. It is necessary to convert to the brightness value in the case.

The fourth embodiment makes this conversion possible. In the figure, 19 is a window surface image pickup means for picking up an image of the window surface 15, 20 is an outdoor illuminance detection means for detecting the outdoor illuminance, and 21 is an outside illuminance detection means. In the case where the window surface luminance information provided in the outside light illuminance distribution estimation unit 11 is imaged from the installation position of the window image capturing unit 19 is subjected to arithmetic processing, the window surface luminance information is imaged from an arbitrary point in the indoor space 14. It is a window surface brightness distribution conversion unit for converting into window surface brightness information.

First, the window brightness distribution converter 21 will be described. When the window surface image pickup means 19 is installed at the point S shown in the figure, the luminance data imaged by the window surface image pickup means 19 is converted into data equivalent to that obtained when the image is picked up at the point P in the figure. Will be described as an example. Except for special cases, there is no temporal change in the position of the counter object outside the window surface, which is the factor that causes the brightness distribution on the window surface, and the light distribution characteristics at a certain point on the window surface are affected by direct light or clouds. It is considered to be relatively stable unless it receives the treatment. Therefore, in advance, to some extent, long-term data regarding the luminance distribution when the window surface 15 is viewed from the P point and the S point at a certain time, or the window surface average luminance is obtained, and these P point and S point Correspond to the data. The window brightness distribution conversion unit 21 uses S
Based on the imaged data of the window surface image pickup means 19 installed at the point, the data which is actually imaged is converted into the data imaged at the point P by referring to the above-mentioned associated data. By providing the window brightness distribution conversion unit 21 in this way, the brightness distribution when the window surface is viewed from an arbitrary point in the room is obtained based on the window surface imaging information, and the external light illuminance distribution estimation unit based on the information. In, for example, by calculating the illuminance using Expression (1), it is possible to accurately estimate the illuminance distribution by the external light.

In the above description, the reference data is divided into time conditions such as seasons and times, but as another example, the reference data may be divided according to weather conditions. Further, in the above description, the points P and S have been described as examples, but the present invention is not limited to this, and the window surface image pickup means 19 can be installed at any position where an image of the window surface can be picked up. You can choose.

Next, the outdoor illuminance detecting means 20 will be described. FIG. 7 is a diagram showing the relationship between the aperture and the brightness in the image pickup system, and 2 to 16 in the figure show the aperture value. The image pickup means has a measurable dynamic range of luminance corresponding to a certain aperture as shown in FIG. Therefore, when the image of the window surface is picked up by the image pickup means, it is necessary to adjust the diaphragm of the image pickup means to the light intensity of the window surface. However, it is convenient to install the image pickup means for picking up an image of the window surface in a place apart from the window surface, for example, in the back side of the room facing the window surface, as shown in FIG. 6, rather than in the vicinity of the window surface. In many cases. In this case, since the light intensity at the window surface and the light intensity at the installation location of the image pickup means are different, the range of the diaphragm of the image pickup means becomes improper, and the luminance may not be measured correctly. In particular, since the light intensity on the window surface changes depending on the weather and the altitude of the sun, when the change width is large, an accurate window surface brightness distribution cannot be obtained with a fixed aperture.

Therefore, in the fourth embodiment, in order to solve the above problem, the outdoor illuminance detecting means 20 is provided so that the illuminance on the window surface can be always detected correctly, and the illuminance on the window surface changes. Even in such a case, the above problems are prevented. The outdoor illuminance detecting means 20 is installed near the window surface and reliably detects the illuminance on the window surface. Then, the illuminance information detected by the outdoor illuminance detecting means 20 is sent to the window surface imaging means 19. On the other hand, the window image pickup means 19 presets a plurality of diaphragms to be used according to the illuminance value,
A suitable aperture is selected from a plurality of apertures according to the illuminance information sent from the outdoor illuminance detecting means 20 and can be automatically set.

With the above configuration, even when the illuminance of the window surface changes due to changes in the weather, the aperture of the window surface image pickup means 19 can be correctly set, and as a result, the indoor illuminance distribution estimated value by outside light This has the effect of increasing the degree of approximation to the actual distribution value of.

Embodiment 5 FIG. FIG. 8 is a block diagram of another embodiment of the present invention, in which the same parts as those shown in FIGS. 1 to 6 are designated by the same reference numerals. In the figure, 22
Is a single or a plurality of indoor space imaging means that can obtain spatial brightness information of the entire room centering on the work surface. As a specific example of the indoor space imaging means 22,
It is preferable to use the CCD camera or the like described in the third embodiment. The CCD camera has an advantage that a small space can be imaged with a small number of image pickup devices and the indoor state can be grasped as a luminance distribution. Reference numeral 23 is a non-work area estimation unit that estimates the non-work area in the room from the information of the indoor space imaging means 22.

Here, a method of estimating the non-work area by the non-work area estimation unit 23 will be described. An image of the room is taken by the indoor space imaging means 22, the change in brightness of the imaged data at predetermined time intervals is examined, and the non-working area is estimated by this. That is, a position with a large change in brightness in a short time of several seconds (several hundred frames as image information) is considered to be due to the movement of a person, and the position is estimated to be a passage and a non-working area. The non-working area is estimated by monitoring the inside of the space for several days after the indoor space imaging means 22 is installed, investigating the degree of luminance change at each position in the room, and preliminarily based on the result of the investigation for each position in the room. The non-working area may be estimated.

Next, an example of a control amount method for the purpose of energy saving using the information of the non-work area estimation unit 23 will be described with reference to FIG.
This will be described with reference to FIG. In FIG. 9, 28 is a non-work area estimated by the non-work area estimation unit 23, and 29 is a work area. Further, the target illuminance distribution setting unit 5 is set so that the target illuminance of the non-work area can be set.

The control amount determining unit 7 in the main controller determines the information estimated by the non-working area estimating unit 23 for each lighting fixture 1, that is, whether or not the lighting fixture illuminates the non-working area. Determine the controlled variable based on the information. In that case, in the work area 29, the target illuminance distribution setting unit 5 is set in advance.
The target illumination distribution set for the work area is realized, and artificial illumination is performed so that the non-work area 28, which may be slightly dark, is illuminated with the target illuminance value set for the non-work area set by the setting unit. Determine the control amount of.

When the indoor illuminance distribution estimation unit 6 is provided with the outside light illuminance distribution estimation unit 11 and the artificial light illuminance distribution estimation unit 10 described in the second embodiment, the control may be performed as follows. First, the outside light illuminance distribution estimation unit 11 estimates the distribution state of the outside light illuminance, and when the outside light illuminance value is higher than the target illuminance value, as described in the second embodiment,
Control is performed to maintain lighting control of the dimming level at a low level constant output without turning off the lighting fixture installed above the predetermined area. On the other hand, when the ambient light illuminance value is lower than the target illuminance value, the artificial light is controlled while constantly checking the artificial light so that the illuminance value on the work surface becomes the target value in the work area. Good. At this time, the illumination state may change considerably due to a slight difference in control level. Therefore, it is desirable to set a certain allowable error with respect to the target value.

The set value of the target illuminance of the non-working area in the target illuminance distribution setting unit 5 is the non-working area if the average target illuminance distribution value of the working area is set as a set allowable limit value or less. Since the luminous flux of the luminaire that illuminates the area can be set to be low, it is possible to surely reduce the illumination power.

As described above, according to the present embodiment, the illumination level in the non-working area such as the passage can be set to be always low, so that power saving can be realized.

Embodiment 6 FIG. FIG. 10 is a block diagram of another embodiment of the present invention, in which the same parts as those shown in FIG. 8 are designated by the same reference numerals. This Embodiment 6 is shown in FIG.
The human body detection means 27 and the absent area estimation unit 24 are provided in the fifth embodiment shown in FIG. The human body detecting means 27 is installed in a plurality of places in the illuminated room to detect an infrared ray to detect a human body, and sends the information to the absent area estimation unit 24. The absent area estimation unit 24 estimates, based on the information from the human body detection means 27, at which position in the illuminated room the person is, or conversely, which area is the absent area. For example, when a plurality of human body detection means are fixed, the set positions thereof are given to the absent area estimation unit 24 in advance as information, and the presence / absence of the human body may be determined according to the output of the human body detection means 27. . If the human body detecting means 27 is not fixed, the information on the detecting direction of the means may be constantly provided to the absent area estimating section 24.

Next, an example of a control amount method for the purpose of energy saving using the information of the absent area estimation unit 24 will be described with reference to FIG.
This will be described with reference to FIG. In FIG. 11, reference numeral 30 indicates a human body, and the position with diagonal lines in the drawing indicates an absent area. The target illuminance distribution setting unit 5 is set so that the target illuminance of the absent area can be set.

The control amount determining unit 7 in the main controller determines the control amount based on the information estimated by the absent area estimating unit 24. In that case, the target illuminance distribution set by the target illuminance distribution setting unit 5 in advance is realized in a place other than the absent area, and the absent area set in the same setting unit is used for the absent area that may be slightly dark. The control amount of artificial lighting is determined so that the target illuminance value can be illuminated.

When the indoor illuminance distribution estimation unit 6 is provided with the external light illuminance distribution estimation unit 11 and the artificial light illuminance distribution estimation unit 10 described in the second embodiment, the control may be performed as follows. First, the outside light illuminance distribution estimation unit 11 estimates the distribution state of the outside light illuminance, and when the outside light illuminance value is higher than the target illuminance value, as described in the second embodiment,
Control is performed to maintain lighting control of the dimming level at a low level constant output without turning off the lighting fixture installed above the predetermined area. On the other hand, when the external light illuminance value is lower than the target illuminance value, the artificial light is controlled while constantly checking the artificial light so that the illuminance value on the work surface becomes the target value in the existing area. Good. At this time, the illumination state may change considerably due to a slight difference in control level. Therefore, it is desirable to set a certain allowable error with respect to the target value.

The set value of the target illuminance of the absent area in the target illuminance distribution setting unit 5 is set to the average target illuminance distribution value of the existing area as a set allowable limit value. Since the luminous flux of the illuminating device for illuminating can be set to be low, reduction of the illumination power can be surely realized.

As described above, according to the present embodiment, the illumination level in the absent area is set to be always low, or when the illuminance value due to the external light at a certain point becomes higher than the target value, the light is turned off, It is possible to reduce power consumption by using the low luminous flux lighting control.

Further, in the sixth embodiment, the absent area estimation 24 is adapted to discriminate the absent area based on the information from the infrared detecting type human body detecting means 27. There is an advantage that it can also be applied to human motion sensors, and even if a plurality of human sensors are installed in the room, they can be immediately applied without changing the installation positions.

Although the infrared detecting type human body detecting means 27 is used in the above-mentioned embodiment, the presence of a person based on the information of the indoor space imaging means 22 in place of the human body detecting means 27 is shown. Alternatively, the absence area determination may be performed. In this case, the indoor space image pickup means 22 takes an image of the inside of the illuminated room and recognizes that a person is present because the position with a large change in brightness within a few seconds is the position where the person is moving. That is, focusing on the movement of the object, the position coordinates at which the movement starts or ends are recognized, and the presence position and the absence position of the person are recognized based on these coordinates. In addition, it is desirable that the series of processes necessary for determining the illumination state be completed within a time period in which the process time is not affected by the change in the amount of outside light due to the change in the sun position.

Embodiment 7 The control of the control amount determination unit 7 in the fifth and sixth embodiments is performed by the non-work area estimation unit 2
3 is an example in which the lighting is controlled based on the information of either the 3 or the absent area estimation unit 24, but in this embodiment, it is based on the information of both the non-work area estimation unit 23 and the absent area estimation unit 24. A method of controlling lighting by using
FIG. 12 is an explanatory diagram for explaining this embodiment, and FIG.
The same parts as those in FIG. 11 are designated by the same reference numerals. 31
Indicates an absent area in the work area 29, and 32 indicates an existing area in the work area 29. The target illuminance distribution setting unit 5 is set so that the target illuminance values of the non-work area and the absent area can be set.

The control amount determining unit 7 is a non-work area estimating unit 23.
Based on the information estimated by the absent area estimation unit 24, the control amount is controlled so that the non-work area 28 is illuminated with the non-work surface target illuminance and the absent area 31 in the work area 29 is illuminated with the absent area target illuminance. decide. When the indoor illuminance distribution estimation unit 6 includes the outside light illuminance distribution estimation unit 11 and the artificial light illuminance distribution estimation unit 10 described in the fifth and sixth embodiments, the control may be performed as follows. First,
When the ambient light illuminance value is higher than the target illuminance value by estimating the distribution state of the ambient light illuminance by the ambient light illuminance distribution estimation unit 11, the lighting equipment installed above the predetermined area is turned off as described in the second embodiment. Without doing so, control is performed to maintain the dimming level at a low level constant output for lighting. On the other hand, when the ambient light illuminance value is lower than the target illuminance value, artificial light is constantly estimated so that the illuminance values of the non-working surface area, the existing area, and the absent area become the preset target values. Control may be performed while checking against the estimated value in the unit 6. At this time, the illumination state may change considerably due to a slight difference in control level. Therefore, it is desirable to set a certain allowable error with respect to the target value.

According to the control method of the present embodiment as described above, the illumination state can be determined so that the illumination level of the non-working area recognized as a passage or the like and the area where no human is present are set low, and Even when the illuminance value due to the external light at a certain point becomes higher than the target value, the light can be turned off and the low luminous flux lighting control can be used, so that the power consumption can be efficiently reduced.

Further, the set values of the target illuminance of the non-work area and the target illuminance of the absent area in the target illuminance distribution setting unit 5 are below the setting target limit values of the target illuminance distribution average values of the work area and the existing area, respectively. By doing,
Since the luminous flux of the luminaire that illuminates the areas corresponding to the non-work area and the absent area can be set to a lower value, reduction of the illumination power can be realized.

Furthermore, by setting the target illuminance set value of the non-working area to be less than the target illuminance set value of the absent area as an allowable limit value, the work area and the non-working area can be distinguished from each other to achieve efficient illumination. In addition, the uniformity of the illuminance distribution determined in relation to the presence or absence of a person in the work area is not extremely reduced. Therefore, in addition to the above power saving effect, it is possible to construct an illumination space that does not impair visual workability and comfort.

Embodiment 8 FIG. FIG. 13 is a block diagram of another embodiment of the present invention, in which the same parts as those shown in FIG. 10 are designated by the same reference numerals. In the eighth embodiment, the spatial information output unit 25 and the optical data correction unit 26 are provided in the sixth embodiment shown in FIG. The spatial information output unit 25 includes the human body presence area information estimated by the absent area estimation unit 24, the non-work area information estimated by the non-work area estimation unit 23, and the indoor illuminance distribution information estimated by the indoor illuminance distribution estimation unit 6. At least one of the information can be output to the outside in some form. By providing such a spatial information output unit 25, the above information can be sent to a control device that controls another environment such as heat or sound, and each control device can be sent to the spatial information output unit 25.
By making it possible to take in the information output from, it becomes possible to control not only the light environment but also the complex environment.

Next, the function of the optical data correction section 26 will be described. Window image pickup means 19 and indoor space image pickup means 22
Optical components such as lenses are used for
Due to the characteristics of the components of the optical system, image distortion and brightness distortion may occur depending on the imaging position. The optical data correction unit 26 removes the influence of this distortion, and corrects the data transmitted from the window surface image pickup means 19 and the indoor space image pickup means 22 by optical correction data or a correction formula,
Input to the indoor illuminance distribution estimation unit 6 or the non-work area estimation unit 24. By providing the optical data correction unit 26,
It is possible to eliminate the influence of the spatial distortion of the imaging information and the distortion of the brightness, and it is possible to accurately detect the luminance distribution. As a result, it is possible to accurately estimate the indoor illuminance distribution and perform control with less error from the target illuminance distribution state.

[0080]

Since the illumination control system of the present invention is constructed as described above, it has the following effects.

The illuminance distribution state on an arbitrary plane in the illumination space is estimated based on the detection value of the light intensity detecting means, and the luminaire is controlled based on the estimated value and the preset target illuminance distribution value. As a result, the indoor illuminance distribution can be recognized at all times, and for example, changes in the indoor brightness state due to temporal fluctuations in the amount of daylight due to changes in the sun position and changes in the weather can be detected in areas such as the conventional sensor It can be regarded as a change in distribution rather than an average change in brightness, and control closer to the target illuminance distribution value can be realized.

Further, an artificial light illuminance distribution estimation unit for estimating the illuminance distribution state based on only the illumination light based on the basic lamp characteristic of the lamp characteristic holding unit is provided while providing the window light intensity detecting means and the lamp characteristic holding unit. Since the external light illuminance distribution estimation unit that estimates the illuminance distribution state based only on the external light based on the detection value of the window light intensity detection means is provided, it is possible to consider the effect of external light and the effect of artificial light separately. It is possible to clearly grasp the ratio of contribution of external light and artificial light to the illuminance distribution for each indoor position. As a result, the illuminance value of outside light at each position in the room can be known, and the illuminance by artificial lighting that should be set for the target value at each position becomes clear, and as a result, lighting control is performed to obtain the target illuminance distribution. This has the effect of making it easier.

Further, from the target illuminance distribution value on a certain plane set by the target illuminance distribution state setting unit, the average target illuminance value in a certain area corresponding to the lighting fixture installation interval including points directly under each lighting fixture is calculated. Then, the calculated average target illuminance value is compared with the average estimated illuminance value in the same area obtained by the outside light illuminance distribution estimation unit, and if the calculated value is low, the adjustment of the lighting equipment above the area is performed. The light level is controlled to keep lighting at a low level output that does not cause flicker in the light source lamp, so it is possible to positively use the brightness of external light and flicker the light source lamp in the lighting fixture. It is possible to reduce the illumination power without generating it and to maintain the comfort of the visual environment.

Further, since the window surface image sensing means for detecting the image information of the window surface is used as the window surface light intensity distribution detecting means, a wide range of window surfaces can be imaged by a small number of image sensing means, and the blind condition of the window surface, etc. It is possible to estimate the external light illuminance distribution in consideration of the brightness change on the window surface.

Further, the window surface illuminance detecting means for detecting the illuminance in the vicinity of the window surface is provided, and the window surface imaging means automatically adjusts the dynamic range of its own light amount according to the output of the window surface illuminance detecting means. Since this is done, it is possible to always perform imaging with the amount of light corresponding to the brightness level on the window surface, and it is possible to obtain accurate window surface brightness distribution information. Further, as a result, the degree of approximation of the indoor illuminance distribution estimated value by the outside light with respect to the actual distribution value becomes high.

Since the window surface luminance distribution converter is provided,
It is possible to obtain the luminance distribution when the window surface is viewed from any point in the room based on the window image pickup information, and it is possible to estimate the external light illuminance distribution based on that information. Can be done accurately.

Further, it has an indoor space image pickup means for picking up an image of the illumination space and a non-work area estimation section for estimating a non-work area of the illumination space based on image information of the indoor space image pickup means. Since the lighting fixtures are controlled based on the estimated value of the distribution estimation unit and the information of the non-work area estimation unit and the target illuminance distribution value of the non-work area preset in the target illuminance distribution setting unit, The lighting level in the work area can be set to a low level all the time, and power can be saved.

Further, since the target illuminance distribution value of the non-working area is set to be equal to or less than the average value of the target illuminance distribution value of the working area, the luminous flux of the luminaire for illuminating the area corresponding to the non-working area can be set low, It is possible to surely reduce the illumination power.

Further, it has a human body detecting means for detecting a human body in the illumination space, and an absent area estimating section for estimating an absent area in the illumination space based on the human body detection information of the human body detecting means. Since the control amount is determined based on the estimated value of the distribution estimation unit and the information of the absent area estimation unit and the target illuminance distribution value of the absent area set in the target illuminance distribution setting unit, the absent area where no person exists The lighting level of can be set to a low level all the time, and power saving can be realized.

Further, since the target illuminance distribution value of the absent area is set to be equal to or less than the average value of the target illuminance distribution value of the existing area, the luminous flux of the luminaire that illuminates the area corresponding to the absent area can be set low, and the illumination power can be reduced. Can be realized reliably.

Further, since the infrared ray detecting means for detecting infrared rays is used as the human body detecting means, it is possible to use a conventionally used motion sensor using infrared rays, and it is assumed that a plurality of infrared ray detecting sensors are installed indoors. In that case, it is possible to respond immediately without changing their installation positions.

Further, the human body detecting means, the absent area estimating section,
An indoor space imaging unit and a non-work area estimation unit are provided, and the estimated value of the indoor illuminance distribution estimation unit, the information of the absent area estimation unit, the information of the non-work area estimation unit, and the target illuminance distribution setting unit are set. Determine the control amount based on the target illuminance distribution value of the non-work area and the absent area, the target illuminance distribution value of the absent area is less than or equal to the average value of the target illuminance distribution value of the existing area, and the target of the non-work area The illuminance distribution value is less than or equal to the average value of the target illuminance distribution value in the work area, and the non-work area target illuminance setting value is set to be less than or equal to the absent area target illuminance setting value. The luminous flux of the luminaire to illuminate can be set low, and the illumination power can be reduced. In addition, since the uniformity of the illuminance distribution determined in relation to the presence or absence of people in the work area is not extremely reduced, it is possible to construct an illumination space that does not impair visual workability and comfort.

Furthermore, at least one of the absent area information of the absent area estimation unit, the non-work area information of the non-work area estimation unit, and the illuminance distribution information estimated by the illuminance distribution estimation unit is output to an external device. Since the spatial information output unit is provided, the above information can be sent to the control device that controls other environment such as heat and sound, and the receiving side control device takes in the information output from the spatial information output unit. By enabling it, it becomes possible to control not only the light environment but also a complex environment.

Further, since the optical data correction unit for removing the influence of the image distortion and the brightness distortion due to the position due to the optical characteristics of the lens used in the window surface image pickup means or the indoor space image pickup means is provided, the image pickup information space It is possible to eliminate the influence of the optical distortion and the brightness distortion, and it is possible to accurately detect the luminance distribution. As a result, it is possible to accurately estimate the indoor illuminance distribution and perform control with less error from the target illuminance distribution state.

Further, the abnormal lighting state detecting means for detecting the abnormal lighting state of each light source lamp of each lighting fixture and the abnormal light information from the abnormal lighting state detecting means are used to identify the abnormal light source lamp. Since the abnormal information display unit for displaying the abnormal information is provided, it is possible to know at an early stage that the abnormal lighting state of the lamp starts to influence the estimation of the spatial illuminance distribution.

[Brief description of drawings]

FIG. 1 is a block diagram showing a basic configuration of a lighting control system according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a basic configuration of a lighting control system according to a second embodiment of the present invention.

FIG. 3 is an explanatory diagram illustrating a method for obtaining an illuminance value from a brightness value obtained by a window surface image pickup unit according to the second embodiment of the present invention.

FIG. 4 is an explanatory diagram illustrating a control method according to a second embodiment of the present invention.

FIG. 5 is a block diagram showing a configuration of a lighting control system according to a third embodiment of the present invention.

FIG. 6 is a block diagram showing a configuration of a lighting control system according to a fourth embodiment of the present invention.

FIG. 7 is a diagram showing a relationship between a diaphragm and brightness in an image pickup system according to a fourth embodiment of the present invention.

FIG. 8 is a block diagram showing a basic configuration of a lighting control system according to a fifth embodiment of the present invention.

FIG. 9 is an explanatory diagram illustrating a control method according to a fifth embodiment of the present invention.

FIG. 10 is a block diagram showing a configuration of a lighting control system according to a sixth embodiment of the present invention.

FIG. 11 is an explanatory diagram illustrating a control method according to a sixth embodiment of the present invention.

FIG. 12 is an explanatory diagram illustrating a control method according to a seventh embodiment of the present invention.

FIG. 13 is a block diagram showing a configuration of a lighting control system according to an eighth embodiment of the present invention.

FIG. 14 is a block diagram showing a configuration of a conventional example.

FIG. 15 is a block diagram showing the configuration of another conventional example.

[Explanation of symbols]

1 Lighting Fixture, 2 Lighting Control Device, 5 Target Illuminance Distribution Setting Unit, 6 Indoor Illuminance Distribution Estimating Unit, 7 Control Amount Determining Unit, 8
Abnormal lighting state detecting means, 9 Abnormality information display section, 10
Artificial light illuminance distribution estimation unit, 11 Ambient light illuminance distribution estimation unit, 1
2 lamp characteristic holding section, 13 window surface light intensity distribution detecting means, 19 window surface imaging means, 20 window surface illuminance detecting means, 2
1 window surface brightness distribution conversion unit, 23 non-work area estimation unit,
27 human body detection means, 24 absent area estimation section, 25
Spatial information output unit, 26 Optical data correction unit.

Claims (15)

[Claims] 1. A luminaire for illuminating an illuminating space, a luminaire control device for changing the illuminating state of the luminaire according to a control signal, and a single or plural light intensities for detecting the intensity of light in the illuminating space. A detection means, a target illuminance distribution setting section for setting a target illuminance distribution value on an arbitrary plane in the illumination space, and based on a detection value of the light intensity detection means, on the arbitrary plane in the illumination space Of the indoor illuminance distribution estimating unit that estimates the illuminance distribution state of the indoor illuminance distribution, and a control amount is determined based on the estimated value of the indoor illuminance distribution estimating unit and the target illuminance distribution value set by the target illuminance distribution setting unit, and the lighting control is performed. An illumination control system, comprising: a control amount determination unit that inputs a control signal to the device. 2. A window surface light intensity detecting means for detecting light intensity of a window surface on which external light is incident on the illumination space, and a lamp characteristic holding section for holding basic lamp characteristics of a light source lamp of the lighting fixture. In addition, the indoor illuminance distribution estimation unit estimates the illuminance distribution state by only the illumination light of the lighting fixture based on the control signal of the control amount determination unit and the basic lamp characteristic of the lamp characteristic holding unit. The illumination control system according to claim 1, further comprising: an estimation unit and an external light illuminance distribution estimation unit that estimates an illuminance distribution state by only external light based on a detection value of the window light intensity detection unit. . 3. The control amount determination unit, from the target illuminance distribution value on a certain plane set by the target illuminance distribution state setting unit,
An average target illuminance value in a certain area corresponding to the lighting fixture installation interval including points directly under each lighting fixture is calculated, and the calculated average target illuminance value and the average in the same area obtained by the outside light illuminance distribution estimation unit If the calculated value is low by comparing with the estimated illuminance value, control is performed so that the dimming level of the luminaire above the area is maintained to be lit at a low level output that does not cause flicker in the light source lamp. The lighting control system according to claim 2, wherein: 4. The illumination control system according to claim 2, wherein the window surface light intensity distribution detecting means is a window surface imaging means for detecting image information of the window surface. 5. A window surface illuminance detecting means for detecting illuminance in the vicinity of the window surface is provided, and the window surface imaging means automatically determines a dynamic range of its own light amount according to an output of the window surface illuminance detecting means. The lighting control system according to claim 4, wherein the lighting control system is adjusted. 6. The outside light illuminance distribution estimation unit calculates a window based on window surface image information obtained in advance by the window image capturing means and window surface image information obtained by capturing an image from an arbitrary plane in the illumination space in advance. 6. The illumination control system according to claim 4, further comprising a window surface luminance distribution conversion unit that converts window surface image information obtained by a surface image pickup means into window surface image information of the arbitrary plane. 7. An indoor space image pickup means for picking up an image of an illumination space, and a non-work area estimation section for estimating a non-work area of the illumination space based on image information of the indoor space image pickup means. The determination unit determines the control amount based on the estimated value of the indoor illuminance distribution estimation unit, the information of the non-work area estimation unit, and the target illuminance distribution value of the non-work area set in the target illuminance distribution setting unit. The illumination control system according to any one of claims 1 to 6, characterized in that: 8. The target illuminance distribution value of the non-working area is
The lighting control system according to claim 7, wherein the target illuminance distribution value in the work area is equal to or less than the average value. 9. A human body detection means for detecting a human body in an illumination space, and an absent area estimation unit for estimating an absent area of the illumination space based on human body detection information of the human body detection means, the control amount. The determining unit determines the control amount based on the estimated value of the indoor illuminance distribution estimating unit, the information of the absent area estimating unit, and the target illuminance distribution value of the absent area set in the target illuminance distribution setting unit. The lighting control system according to claim 1, wherein the lighting control system is a lighting control system. 10. The target illuminance distribution value of the absent area is:
The illumination control system according to claim 9, wherein the target illuminance distribution value in the existing area is equal to or less than the average value. 11. The human body detecting means is an infrared detecting means for detecting infrared rays.
The lighting control system according to 0. 12. A human body detection means for detecting a human body in the illumination space, and an absent area estimation unit for estimating an absent area in the illumination space based on human body detection information of the human body detection means.
The indoor space image pickup means for picking up an image of the illumination space; and a non-work area estimation section for estimating a non-work area of the illumination space based on image information of the indoor space image pickup means. Control based on the estimated value of the illuminance distribution estimation unit, the information of the absent area estimation unit, the information of the non-work area estimation unit, and the target illuminance distribution value of the non-work area and the absent area set in the target illuminance distribution setting unit Amount, the target illuminance distribution value of the absent area is less than or equal to the average value of the target illuminance distribution value of the existing area, and the target illuminance distribution value of the non-working area is less than or equal to the average value of the target illuminance distribution value of the work area. The illumination control system according to any one of claims 1 to 6, wherein the non-work area target illuminance set value is set to be equal to or less than the absent area target illuminance set value. 13. At least one of the absent area information of the absent area estimation unit, the non-work area information of the non-work area estimation unit, and the illuminance distribution information estimated by the illuminance distribution estimation unit is output to an external device. 13. The illumination control system according to claim 12, further comprising a spatial information output unit that controls the illumination. 14. An optical data correction unit for removing the influence of image distortion, brightness distortion, etc. due to optical characteristics of a lens used in the window surface imaging means or the indoor space imaging means. The lighting control system according to any one of claims 1 to 13. 15. Abnormal lighting state detection means for detecting an abnormality in the lighting state of an individual light source lamp of each lighting fixture,
15. An abnormality information display unit that receives abnormality information from the abnormal lighting state detection means and identifies a light source lamp in an abnormal state and displays the abnormality information. Lighting control system.