JP5281560B2 - Lighting design support apparatus and lighting design support method - Google Patents

Description

  The present invention relates to an illumination design support apparatus and an illumination design support method that support the design of an illumination space by using a target space constructed as a virtual three-dimensional space using computer graphics.

  Conventionally, various techniques using computer graphics have been proposed to support the design of an illumination space. Patent Document 1 describes a technique for calculating the required number of lighting fixtures based on the floor area in the building, the target illuminance, and the total luminous flux of the lighting fixture, and determining the arrangement of the lighting fixtures after calculating the number. Yes. Further, it is also described that the illuminance on the ceiling surface, floor surface, and wall surface is calculated and the illuminance is evaluated based on the determined arrangement of the lighting fixtures.

  Recently, lighting fixtures using new light sources such as light-emitting diodes and organic ELs have been developed in place of conventional light sources such as incandescent bulbs and fluorescent lamps, and the spread of this type of lighting fixtures has been promoted. Yes. This type of luminaire is characterized by its small size and light weight. Therefore, applications have been proposed to place many luminaires not only on the ceiling but also on walls and floors. Control is becoming more complex.

JP 2009-9475 A

  As described above, in order to support design of an illumination space in which multiple lighting fixtures are arranged, it is necessary to make a design proposal so that multiple lighting fixtures are appropriately arranged in the lighting space. It will have a lot of work to do.

  The device described in Patent Document 1 is a technique for performing illumination design suitable for an illumination space such as an office or a classroom, and aims to uniformly illuminate the illumination space with a specified illuminance value. Therefore, it cannot be used to support lighting design suitable for lighting spaces that do not necessarily require uniform illuminance, such as residential rooms, hall entrances, and hotel lounges.

  In addition, as described above, when the degree of freedom of arrangement position increases and the number of lighting fixtures increases, it is difficult to determine how to arrange the lighting fixtures in order to form a target lighting space. is there.

  The present invention has been made in view of the above reasons, and its purpose is to arrange lighting fixtures even when there are places with different illuminance values in the lighting space when supporting lighting design using computer graphics. Another object of the present invention is to provide a lighting design support apparatus and a lighting design support method that can optimize the output of a lighting fixture.

  In order to achieve the above object, the present invention provides a virtual three-dimensional space constructed by computer graphics as a target space, an input unit that places a plurality of lighting fixtures in the target space, and all lighting fixtures that are fully lit. When a lighting calculation unit that calculates the degree of contribution of light energy that reaches each part of the target space from each lighting fixture as a lighting state, and a place in the target space and a target illuminance value in the target place are specified, lighting is performed for the place Using the degree of contribution of light energy from each lighting fixture obtained by the calculation unit, the lighting back calculation unit that reversely calculates the dimming rate of each lighting fixture necessary to achieve the target illuminance value, and the lighting back calculation unit An arrangement determining unit configured to remove a lighting fixture having a dimming rate equal to or less than a predetermined threshold among the dimming rates of the respective lighting fixtures from a target space and determine a necessary arrangement of the lighting fixtures.

  In this configuration, a virtual three-dimensional space constructed by computer graphics is used as a target space, and a plurality of lighting fixtures are arranged in the target space. From the second stage for calculating the degree of contribution of light energy reaching each part of the target space, and the lighting fixtures obtained in the second stage with respect to the place by designating the place in the target space and the target illuminance value in the place The third step of calculating back the dimming rate of each lighting fixture necessary to achieve the target illuminance value using the degree of contribution of the light energy, and the dimming rate of each lighting fixture calculated in the third step It is compatible with a procedure including a fourth step of removing a lighting fixture having a dimming rate equal to or less than a predetermined threshold from the target space and determining a necessary arrangement of the lighting fixture.

  In addition, if there is a luminaire that has been removed from the target space by the placement determination unit, the lighting reverse calculation unit, for the remaining luminaires, each illumination necessary to achieve the specified target illuminance value at the specified location. It is desirable to recalculate the dimming rate of the fixture.

  The threshold value used in the arrangement determining unit is set to a lower limit value or more when the dimming rate of the lighting fixture has a lower limit value, and when the luminous efficiency of the lighting fixture changes according to the dimming rate, the luminous efficiency of the specified value or more is set. It is desirable to set within the range that can be obtained.

  It is desirable that the input unit regularly arrange the lighting fixtures when the arrangement interval and the reference point of the lighting fixtures are designated.

  The input unit preferably has a function of defining the target space.

  According to the configuration of the present invention, a plurality of lighting fixtures are arranged in a target space serving as a lighting space, and the degree of contribution of light energy from each lighting fixture to a desired location in the target space is taken into consideration. Thus, the dimming rate of each lighting fixture can be obtained so that the target illuminance value can be obtained at the location. Therefore, even when multiple lighting fixtures are arranged at various locations in the target space and there are multiple locations with different target illuminance values in the target space, the target illuminance at each location The dimming rate of each lighting fixture can be determined so that a value is obtained. Moreover, it is possible to specify different target illuminance values at a plurality of locations in the target space, and it is possible to produce an illumination space with a shaded depth feeling.

  Moreover, since lighting fixtures with a low degree of contribution to obtain the target illuminance value are removed from the target space, it is necessary to place extra lighting fixtures in the target space in advance and obtain the target illuminance value at the place of interest. By narrowing down to the lighting fixtures, it is possible to optimize the arrangement of the lighting fixtures and the output of the lighting fixtures. That is, a realistic proposal can be made regarding the arrangement of the lighting fixtures.

  Furthermore, since the degree of contribution of light energy from the lighting fixture is evaluated for each place, different types of lighting fixtures can be mixed and exist in the target space.

It is a block diagram which shows embodiment. It is a figure which shows the example of the place which sets a target illumination value in the same as the above. It is a figure which shows the concept of the illumination intensity in the place designated in the same as the above. It is operation | movement explanatory drawing which shows the example of the light control characteristic of the lighting fixture used for the same as the above. It is explanatory drawing which shows the outline | summary of the procedure in the same as the above. It is a figure which shows the example of a setting of the area | region which arrange | positions a lighting fixture in the same as the above. It is a figure explaining the arrangement | positioning space | interval of a lighting fixture in the same as the above. It is explanatory drawing of the example using multiple types of lighting fixture or arrangement | positioning space | interval in the same as the above. It is explanatory drawing of the work example which arrange | positions a lighting fixture in the same as the above. It is explanatory drawing of the other example of arrangement | positioning of the lighting fixture in the same as the above.

(Overview)
In the embodiment described below, the illumination simulation related to the target space is basically performed in the following five steps. FIG. 5 is a schematic diagram for helping understanding of each stage.

  First stage (FIG. 5A): A virtual three-dimensional space set using computer graphics technology is defined as the target space 20, and a plurality of lighting fixtures L are arranged in the target space 20. That is, modeling for determining the shape of the target space 20, material data setting for setting attributes (reflectance, color, etc.) of the reflecting surface are performed, and the position, luminous flux, light distribution, and dimming of the arranged lighting fixture L are performed. Set light source information to set attributes such as rate.

  Second stage (FIG. 5B): The lighting state of all lighting fixtures L is set to full lighting (rated lighting), and the light energy emitted from each lighting fixture L and reaching each part of the target space 20 is calculated. That is, an illumination simulation is performed. By this lighting simulation, the degree of contribution of each lighting fixture L in each part of the target space 20 is calculated.

  Third stage (FIG. 5C): A place C where the target illuminance value is set in the target space 20 and the target illuminance value of the place are designated. The light energy obtained in the second stage at each location C in the target space 20 is used as the upper limit value of the light energy at the location C, and each lighting fixture L necessary for realizing the target illuminance value set for each location C is used. Calculate the dimming rate. That is, the dimming rate of each lighting fixture L is calculated backward from the light energy of each part obtained in the second stage and the target illuminance value (light energy) at each designated location (lighting back calculation).

  Fourth stage (FIG. 5 (d)): The lighting fixture L in which the dimming rate obtained in the third stage is equal to or less than the prescribed threshold value in all the specified locations C is the degree of contribution for obtaining the target illuminance value. Therefore, the luminaire L is removed. FIG. 5D shows that the number of lighting fixtures L has decreased.

  Fifth stage: Since the arrangement of the luminaires L is determined in the fourth stage, the dimming rate of each luminaire L is calculated backward from the light energy of each part and the target illuminance value of each designated place C. The target illuminance value is the value specified in the third stage.

  With the above procedure, the position of the lighting fixture and the dimming rate for each lighting fixture can be obtained. In the embodiment described below, each functional unit shown in FIG. 1 is realized by executing an appropriate program using a computer. That is, the procedure described above is realized by each functional unit.

  The computer includes an input device 2 such as a keyboard and a mouse, and a monitor device 3 that displays an image, and the processing device 1 that is a computer main body performs interactive processing using the input device 2 and the monitor device 3. . In addition to a display device such as a liquid crystal display, the monitor device 3 may be a projector that projects an image on a screen, a stereoscopic video display device that includes a curved screen facing a user, and displays an image in three dimensions.

  As shown in FIG. 1, the functional unit realized by the processing device 1 executing the program includes an input unit 11 that performs various settings in the first stage described above, and an illumination calculation unit that performs calculations in the second stage. 12, an illumination reverse calculation unit 13 that performs reverse calculation of the dimming rate in the third stage and the fifth stage, an arrangement determination unit 14 that determines the arrangement of the luminaires in the fourth stage, and a process for displaying on the monitor device 3. There is a display unit 15. Further, as a functional unit, data necessary for various calculations is stored, and a storage unit 16 that holds set contents and calculation results is provided. The data stored in the storage unit 16 includes attributes such as the luminous flux and light distribution of the luminaire and attributes such as the reflectance of the reflecting surface.

  That is, after appropriately arranging lighting fixtures in the specified target space and setting a target illuminance value for each desired location, the dimming rate of each lighting fixture is calculated so as to satisfy the target illuminance value. Furthermore, by determining the arrangement of the luminaires by eliminating the luminaires that are not necessary to meet the target illuminance value, and recalculating the dimming rate using the luminaires after the arrangement is determined, the desired target illuminance is obtained. The lighting space is designed so that a value can be obtained. Hereinafter, two types of embodiments will be exemplified, and the operations from the first stage to the fifth stage will be described more specifically in each embodiment.

(Embodiment 1)
1. First Step An interactive operation using the input device 2 and the monitor device 3 is performed, and a virtual three-dimensional space as a target space is defined by the processing of the input unit 11. The target space is a virtual three-dimensional space that simulates the indoor space of a house, for example, and a plurality of lighting fixtures are arranged in the target space. The lighting fixture can be arranged at an arbitrary position in the target space, and is arranged on a ceiling, a wall, a floor, or the like. Information defining the target space is stored in the storage unit 16.

  As a structure arrange | positioned on a ceiling, the structure embedded to a ceiling surface, the structure which protrudes from a ceiling surface, the structure suspended from a ceiling, etc. are employable. Moreover, as a structure arrange | positioned on a wall, the structure embedded to a wall surface, the structure which protrudes from a wall surface, the structure attached to a wall surface via an arm, etc. are employable. Furthermore, as a structure arrange | positioned on a floor, the structure embedded on a floor surface, the structure standing on a floor like a floor stand, etc. are employable.

  The lighting fixtures can be appropriately combined regardless of the arrangement of the ceiling, the wall, and the floor, and the lighting fixtures having different attributes can be combined and arranged. It is not always necessary to combine different types of lighting fixtures, and it is possible to arrange the same type of lighting fixtures. The number of lighting fixtures can be set appropriately, and even if the number of lighting fixtures to be arranged in the target space becomes excessive, unnecessary lighting fixtures are deleted at a later stage (fourth stage), and unnecessary lighting is provided. No instrument is left behind.

  The attributes of the lighting fixture can be given by, for example, an identifier (ID), light distribution, position (x, y, z), posture (h, p, r), and dimming rate as shown in Table 1. Here, the position is indicated by the coordinate position of the orthogonal coordinate system defined in the target space, and the posture is indicated by the rotation angle around the coordinate axis. Here, the ceiling surface of the target space is the xz plane, and the downward vertical direction is the positive direction of the y direction.

  The light distribution in Table 1 is expressed by the numerical value of the total luminous flux (for example, the lighting apparatus with ID = 02) when the light distribution characteristics of the lighting apparatus are uniform in all directions and can be regarded as a point light source. . In addition, when the light distribution characteristics of the lighting fixture are not uniform in all directions, the file name of the file that defines the light distribution characteristics (for example, the lighting fixture with ID = 03) (the name with the extension “.ies”) is given. (File name). When the light distribution characteristic is defined by the file name, the light distribution characteristic of the lighting apparatus can be obtained by reading the file having the file name.

  In the first stage, among the attributes of each lighting fixture set as shown in Table 1, the dimming rate is set to 100% in all the lighting fixtures and stored in the storage unit 16. Here, when a list regarding the attributes of each lighting fixture as shown in Table 1 is created in advance and registered in the storage unit 16, the list is read from the storage unit 16, and the lighting fixtures are set in the target space based on the list. You may arrange.

  As can be understood from the above description, the input unit 11 has a function of a three-dimensional CAD (Computer-Aided Design) for constructing a target space which is a virtual three-dimensional space, and an optical attribute of an object placed in the target space ( It is possible to set optical attributes for the reflectance (color, etc.) and the attributes (position, luminous flux, light distribution, dimming rate, etc.) of the lighting fixture arranged in the target space.

2. Second Stage When a lighting fixture is arranged in the target space in the first step, the lighting calculation unit 12 performs a lighting simulation according to the attribute of the lighting fixture stored in the storage unit 16. In the lighting simulation, an illumination calculation is performed to generate an image for rendering. Although the rendering is based on the radiosity method, it is possible to display a more realistic image on the monitor device 3 by combining the ray tracing method. Photon mapping may be employed as a rendering technique.

  Various conditions such as a focusing condition and the number of times of light reflection necessary for calculation for performing the illumination simulation are interactively input using the input device 2 and the monitor device 3. In the lighting simulation in the second stage, calculation is performed when all lighting fixtures are fully lit (lighting state where the dimming rate is 100%), and light energy in each part of the target space is calculated. Here, as a part for calculating the light energy, in principle, a micro surface obtained by dividing a surface existing in the target space into a small area is used. Each minute surface has a size corresponding to the area, and is expressed as a surface vector using a vector whose direction is the normal direction.

  In this calculation, since all the lighting fixtures are all turned on, the illuminance at each part of the target space is not necessarily the illuminance desired by the user. However, since it is possible to know the proportion of the light emitted from each lighting fixture that reaches each part of the target space, it is possible to calculate the degree of contribution of each lighting fixture to each part. That is, it is possible to calculate the light energy that each lighting fixture gives to each part of the target space.

  As described above, in the second stage, the light energy from each lighting fixture to each part of the target space is calculated by lighting simulation, and the calculation result (that is, the degree of contribution of each lighting fixture to the illuminance of each part of the target space) ) Is stored in the storage unit 16.

3. Third Stage In the third stage, a target illuminance value to be realized by a lighting fixture is designated for a desired location in the target space. That is, by using the input device 2 and the monitor device 3, a place in the target space is designated and a target illuminance value to be realized in the place is designated.

  As the method for specifying the location in the target space and the target illuminance value, one of the following five methods is selected. The point in the following description actually means one minute surface, and the plane in the following description actually means a plane composed of a set of a plurality of minute surfaces. The three-dimensional space actually corresponds to a set of a plurality of minute surfaces arranged on the surface of the three-dimensional space. Therefore, the target illuminance value set for the three-dimensional space is designated as a value obtained by dividing the light beam (light energy) incident on the surface of interest in the surface of the three-dimensional space by the surface area of the three-dimensional space.

  Method 1: An arbitrary point is designated as a place on the surface (floor surface, wall surface, etc.) of each element constituting the target space, and a target illuminance value is designated at the designated point. In the example shown in FIG. 2A, an appropriate point P is designated on the floor surface 21 of the target space 20.

  Method 2: An arbitrary plane is specified as a place on the surface of each element constituting the target space, and a target illuminance value is specified on the specified plane. The shape and size of the plane are arbitrary, but it is desirable to use an isotropic geometric shape (circular, elliptical, square, rectangular, etc.). Such a setting corresponds to, for example, a case where a target illuminance value is designated using the desk surface as a place. In the example shown in FIG. 2B, a circular plane A is designated on the floor surface 21 of the target space 20.

  Method 3: A virtual human body existing in the target space is assumed, a point corresponding to the eye of the virtual human body is designated as a location, and a target illuminance value is designated at the designated point. The position of the virtual human body in the target space is arbitrary, and the posture of the virtual human body is also arbitrary. In other words, the place is set at an arbitrary position and an arbitrary direction in the target space. In the example shown in FIG. 2C, the viewpoint Pv corresponding to the eyes when the virtual human body 22 moves in the target space 20 is specified.

  However, when a virtual human body intersects a surface (wall surface, ceiling surface, floor surface) surrounding the target space 20 or the surface of an object existing in the target space 20, a place corresponding to the eyes of the virtual human body cannot be specified. . In other words, even within the target space 20, for a region that cannot be specified as the viewpoint Pv of the virtual human body, the location cannot be specified and the target illuminance value cannot be specified.

  Actually, the light energy incident on the part corresponding to the eyes of the virtual human body changes depending on the orientation of the head of the virtual human body, but here, the orientation of the head is not considered, and any arbitrary space in the target space 20 is considered. Specify a location as a point.

  Method 4: A virtual human body existing in the target space is assumed, a three-dimensional space centered on the eyes of the virtual human body is designated as a location, and a target illuminance value is designated for the designated three-dimensional space. The shape and size of the three-dimensional space are arbitrary, but it is desirable to use an isotropic geometric shape (such as a sphere, a spheroid, a cube, or a cuboid). In the example shown in FIG. 2D, a spherical three-dimensional space B is specified around the viewpoint Pv corresponding to the eyes of the virtual human body 22 in the target space 20.

  Basically, the three-dimensional space B can be set at an arbitrary position in the target space 20, but, as in the condition of the method 3, a place corresponding to the eyes of the virtual human body even in the target space 20 For areas that cannot be designated as, the location and the target illuminance value cannot be designated. Further, when a part of the three-dimensional space designated with the eye as the center exceeds the boundary of the target space 20 or overlaps with an object in the target space 20, it overlaps with the region or object beyond the boundary. Are excluded from the range specified as the place. Furthermore, the light energy incident on the three-dimensional space varies depending on the orientation of the head of the virtual human body 22, but the orientation of the head is not considered here.

  Method 5: Regarding the designation of the place in the target space and the designation of the target illuminance value, the above-described methods 1 to 4 can be combined. In the example shown in FIG. 2 (e), a point P is set on the floor surface 21 in the target space 20, an appropriate viewpoint Pv is set on the target space 20, and a circular plane A is designated on the floor surface 21. ing.

  The place where the target illuminance value is set and the target illuminance value at the place are specified by any one of the methods 1 to 5 described above. The designated location and the target illuminance value are stored in the storage unit 16. Alternatively, the designated location and the target illuminance value are handed over to the illumination reverse calculation unit 13.

  It should be noted that the target illuminance value at the designated location cannot exceed the illuminance value at that location when all the lighting fixtures are fully lit. Therefore, the illuminance value obtained from the light energy obtained in the second stage for the place is set as the upper limit value of the target illuminance value of the place, and the target illuminance value is arbitrarily designated within the range up to the upper limit value.

  By the way, by the illumination simulation in the second stage, the degree of contribution of the luminous flux emitted from each lighting device that is fully lit for each part of the target space is calculated, and the calculation result is stored in the storage unit 16. The lighting reverse calculation unit 13 uses these data to reversely calculate the dimming rate of each lighting fixture.

  Now, as shown in FIG. 3, it is assumed that six lighting fixtures Li (i = 1, 2,..., 6) are arranged in the target space 20. Focusing on one minute surface 23 in the target space 20, the illuminance E of the minute surface 23 can be obtained as the sum of the illuminance Ei of the minute surface 23 by the light beams emitted from the respective lighting fixtures Li and respectively incident on the minute surface 23. .

  That is, the illuminance Ei of each lighting fixture Li is obtained by using the illuminance ai when the lighting fixture Li is fully lit (the dimming rate is 100%) and the dimming rate xi of each lighting fixture Li. Xxi. Therefore, E = ΣEi = Σ (ai × xi). Since the illuminance ai when the lighting fixture Li is fully lit is known in the second stage, the lighting back calculation unit 13 sets the dimming rate xi that satisfies the target illuminance value = Σ (ai × xi) to all the lighting fixtures. The calculation for Li is performed.

  However, since the target illuminance value bj (j is the number of target illuminance values) is often specified at a plurality of locations in the target space 20, the illumination back-calculation unit 13 actually indicates [aij] [aij] [ The inverse problem of finding a vector [xi] that satisfies xi] = [bj] is solved.

  This inverse problem becomes indefinite when the number j of target illuminance values bj is smaller than the number i of lighting fixtures Li (j <i), and the number j of target illuminance values bj is larger than the number i of lighting fixtures Li. In the case of (j> i), it becomes impossible.

If conditions the solution becomes unstable, ^| [xi] | ² to minimize seek [xi], and when the condition is the solution becomes impossible, | [aij] [xi] - [bj] | 2 of What is necessary is just to obtain [xi] to be minimized. That is, this results in a problem of obtaining an inverse matrix [aij] ⁻¹ of the matrix [aij] so that [xi] = [aij] ⁻¹ [bj] is satisfied.

  A method for obtaining an approximate solution when the solution is indefinite or impossible employs a known method such as singular value decomposition, and thus a detailed description thereof is omitted. The obtained dimming rate [xi] is applied to each lighting fixture Li, and the list of Table 1 obtained in the first stage is updated. The updated list is stored in the storage unit 16. Table 2 shows an example of the updated list.

4). Fourth Stage Next, the arrangement determining unit 14 employs the list generated as shown in Table 2 in the third stage by deleting from the target space lighting fixtures whose dimming rate is equal to or less than a predetermined threshold. Determine the lighting fixture. The threshold is set by one of the following methods.

  Threshold value 1: A threshold value is set to 0, and only lighting fixtures having a dimming rate of 0 are deleted from the lighting fixtures arranged in the target space. That is, a lighting fixture having a dimming rate of 0 is not turned on and does not contribute to the target illuminance value, and thus is regarded as an unnecessary lighting fixture and is deleted from the target space. That is, unnecessary lighting fixtures are deleted from the list stored in the storage unit 16 in the format shown in Table 2, and the list is updated.

  In the fifth stage, after the unnecessary lighting fixtures are deleted, the calculation for obtaining the dimming rate of each lighting fixture is performed again. However, the lighting fixtures having the dimming rate of 0 originally do not contribute to the target illuminance value. Therefore, when the threshold value 1 is adopted, it is not necessary to recalculate the dimming rate.

  Threshold 2: A positive value is used as the threshold, and lighting fixtures with a dimming rate equal to or less than the threshold are deleted. As the threshold value, either a predetermined value set in advance or a value designated by the user is used. Generally, since there is a lower limit value in the control range of the dimming rate of the luminaire, setting an uncontrollable dimming rate can be prevented by setting the threshold value to a value equal to or higher than the lower limit value.

  If the threshold value 2 is set near the lower limit value of the dimming rate, the threshold value 2 becomes a relatively small value. Therefore, even if a lighting fixture having a dimming rate of 2 or less is deleted from the target space, the target illuminance value changes. The recalculation of the dimming rate in the fifth stage can be omitted. However, when the error needs to be further reduced, it is desirable to recalculate the dimming rate in the fifth stage.

  Regardless of whether or not the light control rate is recalculated in the fifth stage, if there is a lighting fixture to be deleted from the target space, the lighting fixture is deleted from the list stored in the storage unit 16 and the list is updated. .

  Threshold 3: A dimming rate corresponding to the dimming characteristics of the lighting fixture (relationship between power consumption and dimming rate) is set as the threshold. In general, if the type of light source used in the lighting fixture is different, the dimming characteristics are different, so the variable range of the dimming rate is different. For example, a lighting fixture using a fluorescent lamp as a light source has a lower limit value of the dimming rate of about 15% to 25%, and a lighting fixture using an incandescent lamp or a light emitting diode as a light source has a lower limit value of the dimming rate. It can be 0%. Such dimming characteristics of the luminaire are registered in the storage unit 16 in advance. An example of the dimming characteristics of the lighting fixture is shown in FIG. The lower limit value of the dimming rate (the dimming rate is indicated by the illuminance ratio in FIG. 4) of the lighting fixture shown in FIG. 4A is 10%, and the lighting fixture shown in FIG. The lower limit of the light rate is 0%.

  In this way, when the lower limit value of the dimming rate is different for each lighting fixture, a list in which the lower limit value of the dimming rate is set as a threshold value for each lighting fixture can be created. By using this list, it becomes possible to set the dimming rate within a range where dimming is possible for all the lighting fixtures. That is, if a lighting fixture having a dimming rate equal to or less than a threshold is removed from the lighting fixtures included in the list created in the third stage, a lighting simulation within a feasible range is possible.

  In the above example, the lower limit value of the dimming rate is used as the threshold value 3, but in view of the relationship between the power consumption and the dimming rate, the threshold value 3 is set so as to remove the luminaire whose luminous efficiency is not more than the specified value. It is also possible to set.

  In the example shown in FIG. 4B, the illuminance ratio (dimming rate) is 7% when the power consumption is 20%, the illuminance ratio is 20% when the power consumption is 25%, and the power consumption is 50%. The lighting fixture whose illuminance ratio is 60% is shown. Here, the luminous efficiency is expressed as (illuminance ratio / power consumption) × 100%. According to FIG. 4B, this luminaire has a luminous efficiency of 80% or more when the illuminance ratio is 20% or more, but when the illuminance ratio falls below 20%, the luminous efficiency gradually decreases, and the illuminance ratio becomes 10%. It can be seen that the luminous efficiency is 50% or less when the ratio is about%.

  Therefore, in the case of the lighting fixture having the dimming characteristics shown in FIG. 4B, by setting the threshold value to about 20%, it becomes possible to use in a region with high luminous efficiency, and as a result. Lighting design that considers energy saving is possible.

  By the way, when the threshold value 3 is used, similarly to the case where the threshold value 2 is used, if the threshold value 3 is a small value, the target illuminance value is obtained even if the lighting fixture having a dimming rate of the threshold value 3 or less is deleted from the target space. Since there is little change, the fifth stage can be omitted. However, if the fifth stage is omitted, the error increases. In particular, when considering the light emission efficiency when setting the threshold 3, the threshold 3 is not necessarily a small value. Depending on the size of the threshold 3, the actual dimming rate for obtaining the target illuminance value And there is a possibility that an error with the set dimming rate will increase. Therefore, when it is necessary to further reduce the error, it is desirable to recalculate the dimming rate in the fifth stage.

  In the above-described operation example, the lighting fixture whose dimming rate is equal to or lower than the threshold is deleted and the list stored in the storage unit 16 is updated. However, the lighting fixture whose dimming rate is equal to or lower than the threshold is simply deleted. Instead, a list as shown in Table 3 may be generated in which a deletion flag is set for a lighting fixture having a dimming rate equal to or less than a threshold value.

  In this case, the list is used to generate another list in which the luminaires with the deletion flag (in table 3, “del” is “deletion flag”) are set, or from the list. What is necessary is just to perform the process which employ | adopts the lighting fixture in which the deletion flag does not stand. In short, while keeping the information of the list generated in the third stage, the lighting fixtures to be deleted are made known.

  When a list with the deletion flag set is created, the lighting apparatus with the deletion flag set is not used, so the result is the same as when a list with the lighting apparatus deleted is generated. However, when performing a lighting design in which the type and arrangement of the lighting fixtures are not changed or only a part thereof is changed, the already stored list can be reused, which increases convenience.

  For example, if a deletion flag is left in the list generated in the third stage, the type and arrangement of the lighting fixtures in the list stored in the storage unit 16 can be used in the first stage. Instead of updating the list, the list used in the first stage, the list generated in the third stage, and the list generated in the fourth stage are stored in the storage unit 16 separately, so that the list May be reused.

  When the fourth stage is performed, among the lighting fixtures arranged in the first stage, only the lighting fixtures that are indispensable for obtaining the target illuminance value specified in the third stage are left, and the target illuminance value is set for each lighting fixture. The dimming rate necessary to obtain is known.

5. Step 5 When the final attribute (type / position / posture) of the lighting fixture is obtained in the fourth step, using this attribute, the lighting back calculation unit 13 again sets the dimming rate for achieving the target illuminance value. Calculate backwards. As the target illuminance value, the value specified in the third stage is used.

  As described above, except for the case where the threshold value is set to 0 in the fourth stage (that is, when threshold value 2 and threshold value 3 are adopted), a part of the lighting fixture has a small contribution to the target illuminance value. Therefore, in the fifth stage, the dimming rate is obtained again using the deleted lighting fixture.

  However, as described above, even when the lighting fixture is deleted in the fourth stage, recalculation may not be performed if an error is allowed. When the user decides whether or not to implement the fifth step, an instruction is given interactively using the input device 2 and the monitor device 3.

  Moreover, you may decide whether to implement a 5th step according to the difference | error of the illuminance value after deleting a lighting fixture at a 4th step, and a target illuminance value. In this case, if the error is equal to or less than a predetermined reference value, the fifth step may be omitted, and if the error exceeds the reference value, the fifth step may be performed to automate the execution of the fifth step. It becomes possible.

  The result is given to the display unit 15 and displayed on the screen of the monitor device 3. Moreover, the result of the illumination calculation given to the display part 15 is preserve | saved at the memory | storage part 16 as needed.

  In the result of the lighting simulation, as a condition for performing the lighting simulation, data defining the target space and a list of attributes of the lighting fixture are combined. In addition, when a list with a deletion flag set is generated in the fourth stage, a list in which the lighting fixtures with the deletion flag set are deleted is combined. In short, the conditions for the lighting simulation are combined with the results.

  In the operation example described above, the illumination back-calculation unit 13 obtains the dimming rate or illuminance ratio, and the arrangement determination unit 14 sets a threshold value for the dimming rate or illuminance ratio. 14 may be replaced with the power consumption or the power consumption ratio instead of the dimming rate or the illuminance ratio.

  In this case, the dimming rate or the illuminance ratio can be converted into the power consumption by using the dimming characteristics (the relationship between the power consumption and the dimming rate) stored in the storage unit 16. That is, the calculation in the illumination back-calculation unit 13 or the arrangement determination unit 14 may be performed based on the dimming rate or the illuminance ratio, and the calculation result may be converted into power consumption. Alternatively, the calculation result may be converted into a power consumption ratio when displayed on the monitor device 3.

  When power consumption is used as described above, it is easy to estimate energy consumption, so that it is possible to support lighting design with consideration for energy saving. That is, it can be used as a design support tool for energy saving.

  In addition, when the number of lighting fixtures arranged in the first stage is too small with respect to the target illuminance value, there is a place where the target illuminance value is not satisfied even if the dimming rate of all the lighting fixtures is 100%. When the light control rate is obtained in the fourth stage, there is a possibility that the light control rate does not change. Moreover, since the light control rate exceeds a threshold value in all the lighting fixtures, there is a possibility that the lighting fixtures to be deleted in the fourth stage will not occur.

  Therefore, when the number of lighting fixtures is too small in the first stage, all the arranged lighting fixtures are used, and the dimming rate of all the lighting fixtures may be 100%. . In order to avoid such a situation, it is desirable to set more than the number of lighting fixtures considered necessary in the first stage. Even if the number of arranged lighting fixtures is excessive, the final lighting design is optimized because it is narrowed down to the necessary number by appropriately deleting as described above.

  In addition, when the target illuminance value is specified in the third stage, if the specified target illuminance value exceeds the illuminance value obtained by using the lighting fixture arranged in the first stage, the target illuminance value is obtained by back calculation. The calculated dimming rate exceeds 100% in calculation. However, since the setting of the dimming rate exceeding 100% is prohibited, there arises a problem that an error between the illuminance value obtained by the lighting apparatus arranged in the first stage and the target illuminance value becomes large.

  Therefore, in the third stage, when the dimming rate exceeds 100% in the calculation result in the lighting reverse calculation unit 13, it is desirable to show a warning to the user so as to change the attribute and number of lighting fixtures. . Specifically, when the dimming rate exceeds 100% as a result of the reverse calculation in the illumination reverse calculation unit 13, a warning is displayed on the screen of the monitor device 3.

(Embodiment 2)
In Embodiment 1, the arrangement of lighting fixtures is optimized by deleting lighting fixtures that are not necessary for obtaining a target illuminance value designated at a location designated by the user from among the lighting fixtures appropriately arranged by the user. ing. On the other hand, in the present embodiment, a technique for automatically and regularly arranging lighting fixtures in an arrangement area designated in advance in the target space will be described.

  That is, this embodiment differs from Embodiment 1 only in the first stage. In other words, the processing content in the input unit 11 is different from that in the first embodiment. In the input unit 11 of the present embodiment, after the virtual three-dimensional space as the target space is defined, the lighting fixtures are not arranged individually but are arranged in the target space according to the following procedure.

  First, the input unit 11 is instructed in the target space in the target space where the luminaire can be placed. This instruction is performed by an interactive operation using the input device 2 and the monitor device 3. For example, in a state where the target space is displayed on the screen of the monitor device 3, a desired area may be enclosed using a pointing device such as a mouse. In general, the area where lighting equipment can be placed is the area where the lighting duct is placed if the lighting equipment is powered using a lighting duct (wiring duct) placed on the ceiling. It becomes an area | region except opening parts, such as.

  Next, when the type (light source, light distribution, posture, etc.) of the lighting fixture to be placed in the region and the arrangement interval are designated using the input device 2, the designated lighting fixture is designated in the input unit 11. In the specified area at the specified interval. This type of processing is generally known in draw graphic software. When a plurality of types of lighting fixtures are used, the same processing is performed for each lighting fixture, and the lighting fixtures are arranged in the target space by designating the type and arrangement interval of the lighting fixtures. If necessary, the user may correct (change or add) the type and position of the lighting fixture using the input device 2 and the monitor device 3.

  As described above, the user can regularly arrange a plurality of lighting fixtures in a desired region in the target space without arranging individual lighting fixtures in the target space. A list of identifiers, light distribution, position, posture, and dimming rate of the lighting fixtures arranged in the target space is stored in the storage unit 16 as in the first embodiment. The processes after the second stage are the same as those in the first embodiment.

  The operation of the input unit 11 will be described more specifically. First, in order to designate an area in which the luminaire can be arranged, the input unit 11 is provided with an area designation mode. When the area designation mode is selected, a pen-shaped pointer for coloring is displayed on the screen of the monitor device 3. Is displayed.

  Next, by using a pointing device such as a mouse or a pen tablet, the pointer is moved to color a desired area of the target space, and the colored area is set as an area where the lighting apparatus can be arranged. The reason for coloring the regions is to visually distinguish the regions on the screen of the monitor device 3. The area may be specified by a free curve or a closed polygon, or may be specified by using a basic figure such as a rectangle or a circle. In the case of using a basic figure, the basic figure can be deformed in the same manner as the graphic software, and can be changed by changing the size, aspect ratio, rotation angle, etc. of the basic figure.

  If there is an eraser tool, it is possible to delete a part of the designated area. In short, an area may be specified using a function similar to that of known graphic software. The area is designated to be a closed figure, and a tool for painting the inside of the figure (so-called bucket tool) is used to color the inside of the closed figure.

In addition to specifying individual areas, areas can be specified by specifying units in units such as ceilings and walls, and after automatically placing lighting fixtures, users can specify and delete unnecessary lighting fixtures. You may employ | adopt the method of applying the following rules and deleting an unnecessary lighting fixture automatically.
Rule 1: A distance from the surface (for example, 10 cm) is determined for each specified unit, and there is a region where other objects exist within the distance range determined from the surface, as in the case where a duct exists. For example, the area is excluded from the area where the lighting fixture is placed.
Rule 2: If there is a region where there is a recess, projection, or opening, such as a pillar, beam, window, or doorway, for each specified unit, that region is excluded from the region where the luminaire is placed.

  Other rules may be applied as long as it is a rule that distinguishes whether or not to place a lighting fixture, and a region where a lighting fixture is placed or a region where a lighting fixture is not placed may be designated by a numerical value representing coordinates defined in the target space. Is possible.

  FIG. 6 shows a case where an area is specified in units of ceiling 24. FIG. 6A shows an example in which rule 1 is applied to determine whether or not a lighting fixture can be arranged based on the distance between the ceiling 24 and the objects Ob1 and Ob2. The object Ob1 on the left side of the figure has a distance d1 from the ceiling 24 larger than the determined distance d0. In this case, it is possible to place a lighting fixture in a region where the object Ob1 is projected onto the ceiling 24. On the other hand, the object Ob2 on the right side of the drawing has a distance d2 from the ceiling 24 that is smaller than the distance d0. In this case, it is not possible to place a lighting fixture in a region where the object Ob2 is projected onto the ceiling 24.

  FIG. 6B shows an example in which rule 2 is applied when the convex portion Cn exists on the ceiling 24. That is, the region where the convex portion Cn exists is excluded from the region where the lighting fixture is arranged.

  Next, the input device 2 is used to set the type of lighting fixture to be placed, the arrangement interval, and the posture of the lighting fixture. The designation of the type of lighting fixture is the same as that in the first embodiment, and a list as shown in Table 1 above may be generated.

  Here, when the light distribution characteristic is represented by a file name, the user designates the posture (h, p, r) when the lighting fixture is arranged. When adjusting the posture of the luminaire, one luminaire whose posture is to be adjusted is arranged at an arbitrary position within the region where the luminaire designated as described above can be arranged, and the luminaire Is displayed on the monitor device 3. And the attitude | position of a lighting fixture is adjusted so that it may become desired light distribution, seeing the light distribution curve displayed on the monitor apparatus 3. FIG.

  In order to make it easy for the user to understand the posture of the lighting fixture, a window in which the entire target space is reduced is displayed on the screen of the monitor device 3, and the result of the lighting calculation according to the posture of the lighting fixture is displayed in the window. May be displayed. That is, it is possible to adjust the posture of the lighting fixture while confirming the change in light in the target space according to the posture of the lighting fixture of interest.

  As in the first embodiment, the ceiling surface of the target space is the xz plane, and the downward vertical direction is the positive direction of the y direction. In this case, the arrangement interval of the luminaires on the ceiling surface or the floor surface specifies a dimension for at least one of the x direction and the z direction. Moreover, the arrangement | positioning space | interval of the lighting fixture in a wall surface specifies a dimension about at least one of an x direction and ay direction, or at least one of ay direction and az direction.

  Here, since the lighting fixture is not a point, it is necessary to consider the occupied range, and in the real space corresponding to the target space, it is necessary to secure a work space necessary for the installation work of the lighting fixture. . Therefore, the arrangement interval of the lighting fixtures must be determined in consideration of the occupied size and the work space.

  Since the occupancy size and work space of the luminaire differ depending on the type of the luminaire, the occupancy range f is defined as an attribute of the luminaire L as shown in FIG. Is preferably registered in the storage unit 16 in advance. In the figure, the luminaire L is regarded as a point and a circular occupation range f centered on the luminaire L is set. However, it is desirable to set the occupancy range f for each direction according to the shape of the luminaire L. .

  In this way, by registering the occupation range f in the storage unit 16, when the occupation range f overlaps as shown in FIG. 7B at the arrangement interval designated by the user, a warning is given to the monitor device 3. It becomes possible to display. Here, when a warning is displayed on the monitor device 3, the user is instructed to correct the arrangement interval, or the arrangement interval is automatically corrected so that the occupied ranges f do not overlap. If the minimum arrangement interval obtained from the occupation range f is presented on the screen for specifying the arrangement interval by the user, the user can be alerted about the arrangement interval that can be specified.

  A reference point may be designated for the installation position of the luminaire. When designating the reference point, the luminaires are arranged at an arrangement interval designated from the reference point. Therefore, it is possible to change the position of the lighting fixture by changing only the reference point without changing the arrangement interval.

  For example, when a lighting fixture is arranged on the ceiling surface, the coordinates (x, z) of the reference point are (0.3, 0.5), the arrangement interval is 0.8 in the x direction, and 1 in the z direction. For example, the arrangement positions (x, z) of the lighting fixtures are (0.3, 0.5), (1.1, 0.5), (1.9, 0.5),. , 1.5), ..., (0.3, 2.5), ..., (0.3, 3.5), (1.1, 3.5), ....

  On the other hand, if the coordinates (x, z) of the reference point are changed to (−0.1, 0.5), the arrangement interval is not changed, (−0.1, 0.5), ( 0.7, 0.5), (1.5, 0.5), ..., (-0.1, 1.5), ..., (-0.1, 2.5), ..., (-0 .1, 3.5), (0.7, 3.5),... Can be obtained.

  Note that the position of the reference point can be set as appropriate, and the reference point can be set even outside the region where the luminaire can be placed.

  When the arrangement interval of the luminaires is determined as described above, the luminaires within the range designated as the area where the luminaires can be arranged are extracted, an identifier (ID) is assigned to each luminaire, The arrangement position is associated with the identifier, and the light distribution characteristics and postures of the respective lighting fixtures are associated with each other and stored in the storage unit 16. That is, a list regarding the attributes of regularly arranged lighting fixtures is registered in the storage unit 16.

  In order to extract the luminaires in the area where the luminaires can be arranged, the luminaires whose coordinates are in the area may be extracted. That is, the coordinates (x, y, z) of each luminaire may be obtained by the following relationship, and the luminaires within the region where the coordinates (x, y, z) can be arranged may be extracted.

  The coordinates (x, y, z) of the luminaire are obtained by using the reference point (x0, y0, z0) and the arrangement interval (dx, dy, dz) in each axial direction, so that x = x0 + i · dx, y = Y0 + j · dy, z = z0 + k · dz (where i, j, and k are positive integers).

  In addition, since there is a direction in which the arrangement interval is not specified depending on the surface on which the luminaire is arranged, the arrangement interval may be set to 0 for the direction (that is, any of dx, dy, dz becomes 0, and Will use the coordinates of the reference point).

  As described above, after generating a list regarding the attributes of the lighting fixtures, the lighting fixtures are arranged in the target space according to the list. The subsequent processing is the same as in the first embodiment, and after extracting the lighting fixtures necessary to satisfy the target illuminance value of the designated place and deleting unnecessary lighting fixtures, the dimming rate required for each lighting fixture. May be calculated.

  By the way, the above-mentioned example is a procedure in the case of using one type of lighting fixture or an arrangement interval, and when using a plurality of types of lighting fixtures or a plurality of arrangement intervals, the above-mentioned example is given for each type of lighting fixture and the arrangement interval. Place the luminaire in the procedure. For example, as shown in FIG. 8, two types of lighting fixtures La and Lb are used, the target space is divided into two in the z direction, the lighting fixture La is arranged on one side in the z direction, and the lighting fixture Lb is placed in the z direction. The case where it arranges on the other side is assumed. In the target space, a region Ra is set on the one side in the z direction, and a region Rb is set on the other side.

  In this case, the light distribution of each of the lighting fixtures La and Lb is specified and the posture is adjusted, and the arrangement intervals ga and gb and the reference points Pa and Pb are specified for each of the lighting fixtures La and Lb. Therefore, the lighting fixtures La and Lb are extracted for each of the regions Ra and Rb, and a list regarding the attributes of the lighting fixtures La and Lb is created.

  In the list stored in the storage unit 16 in the above-described procedure, lighting fixtures having the same attribute are arranged in a region where the lighting fixtures can be arranged. Therefore, after the list is stored in the storage unit 16, it is possible to change the type and arrangement position of the lighting fixtures by interactive input using the input device 2 and the monitor device 3. In addition, lighting fixtures can be added or deleted.

  In this way, by making correction work by the user possible, it becomes possible to finely adjust the lighting environment of the target space. In addition, since a list of many luminaires is stored in the storage unit 16 in advance, the operation is semi-automated, and when a large number of luminaires are arranged, the user can select all of the luminaires. The amount of work is reduced compared to inputting attributes.

  For example, as shown in FIG. 9, 20 lighting fixtures L may be regularly arranged in the target space, and only two lighting fixtures L (the lighting fixture Lc described at the right end of FIG. 9) are arranged. Is changed (moved by a predetermined distance to the right in FIG. 9). In this case, the attributes are not individually specified for the 20 lighting fixtures L, but after generating the list by specifying the arrangement interval and the reference point as described above, only the two lighting fixtures Lc to which attention is paid. The arrangement position is adjusted.

  Similarly, the luminaire L is a downlight arranged on the ceiling, and only three luminaires L (the luminaire Ld described in the lower left portion of FIG. 9) are distributed toward the wall, and the rest are directly below. Suppose the light distribution toward In this case as well, it is only necessary to adjust the posture of only the three lighting fixtures Ld of interest.

  Here, when the posture of the lighting fixture is changed, the arrangement interval between each pair of adjacent lighting fixtures does not change, and when the lighting fixture is deleted, the arrangement interval becomes large. There is no need to consider the range (ie, the minimum spacing). However, regarding other attribute changes, it is necessary to confirm that the minimum arrangement interval is satisfied for each luminaire after the attribute change.

  That is, when the minimum arrangement interval is not satisfied due to the change of the attribute, the lighting fixtures existing within the minimum arrangement interval among the lighting fixtures existing around the lighting fixture are deleted or the change of the attribute is stopped. The user selects whether to do it. In addition, when changing the type of luminaire when changing the attribute, the luminaire attribute change is preferentially treated as having high importance, and peripheral luminaires that do not meet the minimum arrangement interval are automatically handled. It is desirable to delete it.

  When the arrangement of all the luminaires is determined as described above, the list of luminaire attributes is updated, and the updated list is stored in the storage unit 16. In updating the list, the list may be updated after determining the arrangement of all the lighting fixtures, or the list may be updated every time the attribute of each lighting fixture is changed. In the latter case, the change of the lighting fixture is stored in the storage unit 16 every time the attribute of the individual lighting fixture is changed. When the list update is completed, the process proceeds to the second stage as in the first embodiment.

  This embodiment is particularly effective when the target space is an office space or the like and a large number of lighting fixtures of the same type are arranged almost regularly. In general, in this type of target space, the arrangement positions of the luminaires are almost equally spaced. However, it takes much labor for the user to determine the arrangement positions of the individual luminaires and arrange them in the target space. On the other hand, in this embodiment, since most of the arrangement positions are automatically determined and only necessary portions are adjusted, the labor can be greatly reduced. In other words, it is possible to study a plurality of types of lighting designs with the effort conventionally required for one type of lighting design. Therefore, a better lighting design is possible.

  In the above-described operation example, the luminaire is arranged at a lattice point of a two-dimensional lattice composed of rectangular (square, rectangular) unit lattices, and the direction of the lattice axis (virtual axis connecting the lattice points) is the target. Although it is assumed that the coordinate axis of the orthogonal coordinate system set in the space is parallel to the coordinate axis, the lattice axis and the coordinate axis may not coincide with each other.

  That is, as shown in FIG. 10A, the rotation angle θ and the rotation center cθ can be designated, and the entire two-dimensional lattice is designated around the designated rotation center cθ in the plane of the two-dimensional lattice. You may rotate only rotation angle (theta). Since the shape of the unit grid does not change by rotation, the position of the lighting fixture L may be calculated by rotating the two-dimensional grid after obtaining the arrangement position of the lighting fixture L in the original two-dimensional grid before the rotation.

  Further, as shown in FIG. 10B, every two adjacent lattice axes At of the two-dimensional lattice may be shifted in the extending direction of the lattice axis At. In this case, the lighting fixtures L on the lattice points are arranged in a so-called staggered pattern. When such an arrangement is selected, a direction in which the lattice axis At is shifted and a dimension (offset) df by which the lattice axis At is shifted are specified.

  Furthermore, as shown in FIG. 10C, a plurality of circular imaginary lines sc set concentrically around the center point cc of interest, and a plurality of linear imaginary lines set radially from the center point cc. You may employ | adopt the structure which arrange | positions the lighting fixture L in the intersection with sl. In this case, in place of the arrangement interval with respect to each coordinate axis of the orthogonal coordinate system set in the target space, the coordinate position where the luminaire is arranged using the interval r of the circular virtual line and the angle interval φ of the radial line is set. calculate.

  That is, assuming that the lighting fixture is arranged on the ceiling surface (xz plane), the coordinate position of (x0 + n · rcos (mφ), z0 + n · rsin (mφ)) with respect to the coordinates (x0, z0) of the center point. (Where n, m = 0, 1, 2,..., The maximum value of n is the number of concentric circles, and the maximum value of m is the number of straight lines −1). The arrangement position of the luminaire is designated by r and φ in the ceiling surface, and the y coordinate is designated for the distance from the ceiling surface.

  Furthermore, when luminaires are arranged on a plurality of spherical surfaces having a common center point, the angle of the virtual line with respect to the xz plane is required to define a straight virtual line. to enable. Other configurations and operations are the same as those of the first embodiment.

DESCRIPTION OF SYMBOLS 1 Processing apparatus 2 Input apparatus 3 Monitor apparatus 11 Input part 12 Illumination calculation part 13 Illumination reverse calculation part 14 Arrangement | positioning determination part 15 Display part 16 Storage part 20 Target space

Claims (6)

  An input unit that places a virtual three-dimensional space constructed by computer graphics as a target space and places a plurality of lighting fixtures in the target space, and sets all lighting fixtures to all lighting states from each lighting fixture to each part of the target space The lighting calculation unit that calculates the degree of contribution of light energy reaching the light source, and the light energy from each lighting fixture obtained by the lighting calculation unit for the location when the location in the target space and the target illuminance value in the location are specified The lighting back-calculation unit that back-calculates the dimming rate of each lighting fixture necessary to achieve the target illuminance value using the degree of contribution of the lighting, and the dimming rate out of the dimming rates of each lighting fixture calculated by the lighting back-calculation unit An illumination design support apparatus, comprising: an arrangement determination unit that removes an illumination fixture having a threshold value equal to or less than a predetermined threshold value from the target space and determines a required placement of the illumination fixture.   When there is a lighting fixture that has been removed from the target space by the placement determination unit, the lighting reverse calculation unit has each lighting necessary to achieve the target illuminance value specified at the specified location for the remaining lighting fixtures. The lighting design support apparatus according to claim 1, wherein the dimming rate of the appliance is recalculated.   The threshold value used in the arrangement determining unit is set to a lower limit value or more when the dimming rate of the lighting fixture has a lower limit value, and a luminous efficiency of a specified value or more when the luminous efficiency of the lighting fixture changes according to the dimming rate. The illumination design support device according to claim 1, wherein the illumination design support device is set within a range where   The lighting design support apparatus according to any one of claims 1 to 3, wherein the input unit regularly arranges the lighting fixtures when an arrangement interval and a reference point of the lighting fixtures are designated.   The lighting design support apparatus according to claim 1, wherein the input unit has a function of defining the target space.   A first stage in which a virtual three-dimensional space constructed by computer graphics is set as a target space and a plurality of lighting fixtures are arranged in the target space, and all lighting fixtures are turned on in the lighting state, and each lighting fixture is set in each target space. The second stage for calculating the degree of contribution of the light energy reaching the part, the place in the target space and the target illuminance value in the place are designated, and the light energy from each lighting device obtained in the second stage for the place is calculated. The third step of calculating back the dimming rate of each lighting fixture necessary to achieve the target illuminance value using the degree of contribution, and the dimming rate of the dimming rate of each lighting fixture calculated in the third step is And a fourth step of determining a necessary arrangement of the luminaires by removing the luminaires that are equal to or less than a predetermined threshold from the target space.

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