JP2017218733A - Solar shading system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solar shading system capable of suppressing generation of glare.SOLUTION: The solar shading system includes: a dimming glass 10 which is disposed on a window B1 of a building B, and is capable of changing shading degree as the ratio of shading the light incident on the window B1; a sky monitoring camera 20 that picks up image of the sky above the building B to create a piece of image data; and a calculation unit 30 and a controller 40 that adjust the shading degree while considering the amount of cloud C in the image data. The calculation unit 30 estimates the amount of cloud C while considering the color in the image data.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a technique of a solar radiation shielding system including a shielding unit that can change a shielding degree that is a ratio of shielding light incident on an opening of a building, and an adjusting unit that adjusts the shielding degree.

  2. Description of the Related Art Conventionally, a technique of a solar radiation shielding system including a shielding unit that can change a shielding degree that is a ratio of shielding light incident on an opening of a building and an adjusting unit that adjusts the shielding degree is known. For example, as described in Patent Document 1.

  The blind control system (sunlight shielding system) described in Patent Document 1 includes a blind (shielding means), an illuminometer, a control unit (adjustment means), and the like. Blinds are installed in building windows (openings). The illuminometer measures the illuminance on the roof of the building and inputs the result to the control unit. A control part adjusts the slat angle (shielding degree) of a blind based on the illumination intensity (measurement result of an illumination meter) etc. on a rooftop.

  The blind control system described in Patent Document 1 is configured to adjust the slat angle from the current rooftop illumination. In this case, for example, when the sun is hidden behind a cloud (when the illuminance decreases), the blind control system adjusts the slat angle to make it easier for light to enter the room. Moreover, when the sun hidden in the clouds comes out (when the illuminance increases), the blind control system adjusts the slat angle to block the light incident from the window. In this case, light (direct sunlight) may enter the room temporarily until the slat angle is adjusted after the sun comes out, and glare may occur. The blind control system has room for improvement in this regard.

JP, 2015-127470, A

  The present invention has been made in view of the above situation, and a problem to be solved is to provide a solar shading system capable of suppressing the occurrence of glare.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, according to the first aspect of the present invention, image data is obtained by capturing the sky above the building and shielding means that is installed in the opening of the building and can change the degree of shielding that is a ratio of shielding light incident on the opening. An imaging unit to be created, and an adjusting unit that adjusts the degree of shielding in consideration of the amount of clouds on the image data.

  According to a second aspect of the present invention, the adjusting means estimates the cloud amount in consideration of a color on the image data.

  According to a third aspect of the present invention, the adjusting means estimates a clearness amount on the image data in consideration of a color on the image data, and considers the amount of clearness and the amount of clouds in consideration of the amount of the cloud. The ratio of the cloud in the entire sky on the data is calculated, and the shielding degree is adjusted in consideration of the ratio of the cloud.

  According to a fourth aspect of the present invention, the adjusting means adjusts the shielding degree in a stepwise manner in accordance with a ratio occupied by the cloud.

  According to a fifth aspect of the present invention, the adjusting means adjusts the shielding degree in stages only when it is determined that direct sunlight is incident on the opening.

  According to a sixth aspect of the present invention, the adjusting means determines whether or not direct sunlight is incident on the opening in consideration of date and time.

  According to a seventh aspect of the present invention, the adjusting means adjusts the shielding degree to a minimum value when it is determined that direct sunlight does not enter the opening.

  The image pickup unit repeatedly creates the image data, and the adjustment unit determines a temporary shielding degree value in consideration of the amount of clouds on the latest image data, and repeatedly creates the image data. The final shielding degree value is determined by correcting the temporary shielding degree value in consideration of the temporal change of the cloud amount on the image data, and the shielding degree is determined as the final shielding value. It adjusts so that it may become a value of a sufficient shielding degree.

  In Claim 9, the said shielding means is comprised with light control glass.

  As effects of the present invention, the following effects can be obtained.

  According to the first aspect, the occurrence of glare can be suppressed.

  In claim 2, the amount of clouds can be easily obtained.

  In Claim 3, generation | occurrence | production of a glare can be suppressed effectively.

  In claim 4, the degree of shielding can be easily adjusted.

  In the fifth aspect, the system can be operated without waste.

  In claim 6, it can be easily determined whether or not the direct sunlight is incident on the opening.

  According to the seventh aspect, when there is no possibility of occurrence of glare, a lot of light can be taken in from the opening.

  According to the eighth aspect, the shielding degree can be adjusted in consideration of the temporal change of the clouds.

  According to the ninth aspect, since the outside can be easily seen from the opening, the feeling of blockage can be reduced.

The schematic diagram which showed the structure of the solar radiation shielding system. The flowchart which showed operation | movement of the solar radiation shielding system. The figure which showed the table structure of solar radiation information DB. The figure which showed the result of having analyzed image data. The figure which showed the relationship between the ratio which a cloud occupies, and the risk of glare occurrence.

  Below, the solar radiation shielding system 1 which concerns on one Embodiment of this invention is demonstrated.

  The solar radiation shielding system 1 is a system for appropriately shielding light incident on the window B1 of the building B. In the present embodiment, the light incident on the window B1 includes daytime light from sunlight, that is, direct sunlight, sky light, and feature reflected light.

  First, the building B which concerns on this embodiment is demonstrated.

  A building B shown in FIG. 1 is an office building. In the building B, a company, an office, or the like occupies a space defined by the outer wall and the inner wall. A plurality of windows B1 (openings for daylighting and ventilation) are provided on the outer wall. The building B is provided with a rooftop B2.

  Next, the configuration of the solar shading system 1 will be described with reference to FIG. In the following, a case where light incident on the window B1 (one window) shown in FIG. 1 is shielded will be described as an example.

  The solar radiation shielding system 1 is constructed in a building B. The solar radiation shielding system 1 includes a light control glass 10, a sky monitoring camera 20, a calculation device 30, and a controller 40.

  The light control glass 10 is for shielding the light which injects into window B1. The light control glass 10 is installed in the window B1. The light control glass 10 includes two pieces of glass (not shown) arranged at an interval between the indoor side and the outdoor side, and a liquid crystal sheet (not shown) provided between the two pieces of glass. . The light control glass 10 is comprised so that transparency (ratio which shields light) can be changed according to the magnitude | size of the voltage applied to the said liquid crystal sheet.

  The sky monitoring camera 20 is for photographing the sky above the building B. The sky monitoring camera 20 is installed on the rooftop B2. The sky monitoring camera 20 is arranged with its lens facing the sky. The sky monitoring camera 20 is configured to be able to output image data D (see FIG. 4) created by photographing the sky to the outside. The sky monitoring camera 20 captures the sky from sunrise time to sunset time. Such sunrise time and sunset time can be obtained from the date (shooting date) and the longitude and latitude of the building B. In addition, the sky monitoring camera 20 repeatedly captures the sky at regular intervals (15 minutes in the present embodiment).

  The arithmetic device 30 performs arithmetic processing required for processing of the solar shading system 1. The arithmetic device 30 includes a central processing unit (CPU), a storage device (a main storage device such as a RAM and a ROM, and a storage such as an SSD and an HDD), an input device (a keyboard and a mouse), and an output that are connected to each other via a bus. Device (liquid crystal display) and the like. The arithmetic device 30 is configured by appropriately installing a program or the like on a commercially available PC. The arithmetic device 30 can perform arithmetic processing necessary for processing of the solar shading system 1 by calling and executing a program stored in the storage by the central processing unit. Moreover, the arithmetic unit 30 has a clock function inside, and can acquire the current date and time. The arithmetic device 30 is connected to the sky monitoring camera 20 and configured to be able to input image data D. The computing device 30 includes a solar radiation determination unit 31, an image analysis unit 32, a transparency determination unit 33, and a solar radiation information DB (Database) 34.

  The solar radiation determination unit 31 is for determining whether or not the direct sunlight enters the window B1 when it is assumed that it is clear on a certain date and time (for example, 7:00 on January 1). The solar radiation determination unit 31 is realized by executing a program that operates on the arithmetic device 30. The process of the solar radiation determination unit 31 will be described in detail later.

  The image analysis unit 32 is for analyzing colors on the image data D. The image analysis unit 32 is realized by executing a program that runs on the arithmetic device 30. The processing of the image analysis unit 32 will be described in detail later.

  The transparency determining unit 33 is for determining the transparency of the light control glass 10. The transparency determining unit 33 is realized by executing a program that operates on the arithmetic device 30. The processing of the transparency determining unit 33 will be described in detail later.

  The solar radiation information DB 34 is for storing, for each date and time, whether or not the direct sunlight is incident on the window B1 when it is assumed to be clear. The solar radiation information DB 34 is realized, for example, by creating a table with column names of month / day, time, and presence / absence of solar radiation in a DBMS (Database Management System) installed in the computing device 30 (see FIG. 3). .

  The presence / absence of solar radiation indicates whether or not direct sunlight enters the window B1 when it is assumed that the weather is clear at a certain date and time. The presence / absence of solar radiation is “present” when direct sunlight is incident, and “absent” when direct sunlight is not incident. In the solar radiation information DB 34 (table), the presence or absence of such solar radiation is registered in the process of the solar radiation shielding system 1 described later.

  The controller 40 is for controlling the light control glass 10. The controller 40 is connected to the light control glass 10 and configured to be able to control the magnitude of the voltage applied to the liquid crystal sheet. Further, the controller 40 is connected to the arithmetic device 30 and configured to be able to input a signal related to transparency from the arithmetic device 30. The controller 40 controls the magnitude of the voltage applied to the liquid crystal sheet based on the signal related to transparency. Thereby, the controller 40 can control the light control glass 10 so that it may become transparency according to the signal from the arithmetic unit 30.

  Next, processing of the solar shading system 1 will be described with reference to FIGS. The process of the solar shading system 1 is a process of adjusting the transparency of the light control glass 10 based on the image data D taken by the sky monitoring camera 20. The process of the solar shading system 1 according to the present embodiment is executed at the same timing as the time when the sky monitoring camera 20 captures an image. Thereby, the solar shading system 1 repeatedly adjusts the transparency at 15-minute intervals based on the image data D (that is, the latest image data D) captured by the sky monitoring camera 20 at the same timing.

  As shown in FIG. 2, in step S <b> 101, the arithmetic device 30 inputs the current date and time to the solar radiation determination unit 31. At this time, for example, the arithmetic unit 30 acquires the current date and time using the clock function or the like, and inputs the acquisition result to the solar radiation determination unit 31. The arithmetic unit 30 performs the process of step S102 after performing the process of step S101.

  As shown in FIGS. 2 and 3, in step S <b> 102, the arithmetic unit 30 inputs (registers) date, time, and presence / absence of solar radiation into the solar radiation information DB 34 (table). For example, the arithmetic unit 30 performs the simulation based on the longitude and latitude of the building B, the direction of the window B1 and the surrounding environment (whether there is something that blocks direct sunlight, etc.), thereby determining whether or not there is solar radiation for each date and time. Ask. And the arithmetic unit 30 registers the calculated | required result in the solar radiation information DB34. Thereby, in the solar radiation information DB 34, the presence or absence of solar radiation during the time (from sunrise time to sunset time) when the solar radiation shielding system 1 operates is registered at intervals of 15 minutes. Also, in the solar radiation information DB 34, the presence or absence of solar radiation between January 1 and December 31 is registered.

  In addition, the process of step S102 is performed only by the process (first process) performed first after constructing the solar radiation shielding system 1, and is skipped in the process after the next (process after the second). The arithmetic unit 30 performs the process of step S103 after performing the process of step S102.

  In step S <b> 103, the arithmetic unit 30 determines (determines) whether or not there is solar radiation (direct sunlight is incident on the window B <b> 1 when it is assumed clear) by executing the solar radiation determination unit 31. . The solar radiation determining unit 31 determines whether or not there is solar radiation at the timing (15 minutes later) when the solar radiation shielding system 1 is processed next. The solar radiation determination unit 31 performs such determination using the current date and solar radiation information DB 34 input in step S101. More specifically, the solar radiation determination unit 31 searches the solar radiation information DB 34 using the date and time 15 minutes after the current date and time as a key. For example, in the case where “1/1” and “6:45” and the current date and time are input in step S101, the solar radiation determination unit 31 uses “1/1” and “7:00” as keys as the solar radiation information DB 34. And the fact that the presence or absence of solar radiation is “none” is acquired as a search result. The solar radiation determination unit 31 determines that there is no solar radiation when the presence or absence of solar radiation is “none” (NO in step S103). In this case, the arithmetic unit 30 executes the process of step S104.

  In step S104, the arithmetic unit 30 sets the transparency of the light control glass 10 to the maximum value (the light control glass 10 can adjust) (a value that makes the light control glass 10 substantially transparent (a value close to 100%)). ). Such a maximum value is a value at which the ratio of shielding light is minimized. Then, the arithmetic unit 30 inputs a signal related to transparency (maximum value) to the controller 40. The controller 40 controls the light control glass 10 based on the signal from the arithmetic unit 30 so that the transparency becomes the maximum value. Thereby, the arithmetic unit 30 and the controller 40 adjust the transparency of the light control glass 10 to the maximum value.

  Here, when it is determined that there is no solar radiation in step S103 (NO in step S103), direct sunlight does not enter the window B1 and glare until the next processing of the solar radiation shielding system 1 is performed, even if it is clear. Is not expected to occur. Therefore, in such a case, the transparency of the light control glass 10 is adjusted to the maximum value (step S104) so that the light incident from the window B1 is not shielded as much as possible. According to this, since it is possible to capture light from the window B1 as much as possible when there is no possibility of occurrence of glare, it is possible to reduce illumination illuminance using natural light. For this reason, the power consumption of illumination can be reduced and the energy saving effect can be acquired.

  The arithmetic unit 30 ends the process of the solar shading system 1 after executing the process of step S104.

  In step S103, when the solar radiation determination unit 31 determines that there is solar radiation (the presence or absence of solar radiation is “Yes”) (YES in step S103), the arithmetic unit 30 executes the process of step S105. .

  In step S <b> 105, the arithmetic unit 30 obtains the amount of the cloud C on the image data D and inputs it to the transparency determination unit 33. The amount of the cloud C is a numerical value of the area of the cloud C on the image data D, specifically, the number of pixels of the cloud C, the area of the cloud C on the image data D, and the like. As illustrated in FIG. 4, the arithmetic unit 30 inputs the image data D to the image analysis unit 32 and executes the image analysis unit 32 to obtain the amount of the cloud C. In addition, in FIG. 4, the clear space F (the blue part of the sky like the cut of the cloud C) is shown with the oblique line.

  In step S105, first, the image analysis unit 32 adds up the pixels of the image data D for each color. At this time, the image analysis unit 32 determines that pixels having the same color information (RGB value in the present embodiment) have the same color and performs aggregation (counting the number of pixels having the same RGB value set). ). Then, the image analysis unit 32 extracts the upper tenth color (from the first color C1 to the tenth color C10) having a large total value, and associates the RGB value with the number of pixels (see FIG. 4). In the bar graph shown in FIG. 4, the bars are arranged along the vertical axis, and the horizontal width (length) of the bars indicates the total value (number of pixels).

  In step S105, the image analysis unit 32 extracts the color of the cloud C (white or gray) from the first color C1 to the tenth color C10. At this time, the image analysis unit 32 determines that the RGB values from the first color C1 to the tenth color C10 (see RGB values shown in FIG. 4) are “R value = G value = B value”. Alternatively, it is determined whether or not the condition of “R value> B value and G value> B value” is satisfied. Then, the image analysis unit 32 extracts a color that satisfies the above condition as a color of the cloud C. Accordingly, the image analysis unit 32 extracts the first color C1, the second color C2, the fifth color C5 to the seventh color C7, and the tenth color C10. Such conditions for extracting the color of the cloud C are set in advance before the processing of the solar shading system 1 is performed.

  In step S105, the image analysis unit 32 extracts the extracted colors C1, C2,. The amount of cloud C is estimated by summing the number of pixels (length of the bar graph) of C5 to C7 · C10. Thereby, the image analysis unit 32 obtains the amount of the cloud C and inputs it to the transparency determination unit 33.

  As shown in FIG. 2, the arithmetic unit 30 executes the process of step S <b> 105 and then executes the process of step S <b> 106.

  In step S <b> 106, the arithmetic unit 30 obtains the amount of sunny space F on the image data D and inputs it to the transparency determination unit 33. The amount of the clear space F is a numerical value of the clear space F area on the image data D, specifically, the number of pixels of the clear space F, the area of the clear space F on the image data D, and the like. The arithmetic unit 30 executes the image analysis unit 32 to obtain the amount of sunny space F.

  In step S106, the image analysis unit 32 extracts the color (light blue) of the sunny space F from the first color C1 to the tenth color C10 shown in FIG. At this time, the image analysis unit 32 extracts the color of the clear sky F from the colors C3, C4, C8, and C9 that are not extracted as the color of the cloud C in step S105. The image analyzing unit 32 determines whether or not the RGB values of the colors C3, C4, C8, and C9 satisfy “R value <B value and G value ≦ B value”. Then, the image analysis unit 32 extracts a color satisfying the above condition as a clear-space F color. Thereby, the image analysis unit 32 extracts the third color C3, the fourth color C4, the eighth color C8, and the ninth color C9. Such conditions for extracting the color of the sunny day F are set in advance before the processing of the solar shading system 1 is performed. In addition, when there is a color that does not satisfy the above condition among the colors C3, C4, C8, and C9, the image analysis unit 32 determines that the color is not the color of the cloud C or the color of the clear sky F and excludes it. .

  In step S <b> 106, the image analysis unit 32 estimates the amount of sunny space F in the same procedure as when the amount of cloud C is estimated. As a result, the image analysis unit 32 obtains the amount of sunny space F and inputs it to the transparency determination unit 33.

  As illustrated in FIG. 2, the arithmetic device 30 executes the process of step S107 after executing the process of step S106.

  In step S <b> 107, the arithmetic unit 30 executes the transparency determination unit 33 to calculate the ratio of the cloud C in the entire sky on the image data D.

  More specifically, in step S107, the transparency determination unit 33 adds the amount of clouds C and the amount of clear sky F input in steps S105 and S106, thereby adding the amount of the entire sky on the image data D (image A numerical value of the entire sky area on the data D, in this embodiment, the number of pixels of the entire sky) is calculated. Then, the transparency determining unit 33 calculates the ratio of the cloud C by dividing the amount of the entire sky from the amount of the cloud C (the number of pixels of the color of the cloud C). The ratio of such a cloud C is a value close to 1 when the amount of the cloud C is large (cloudy), and is 0 when the amount of the cloud C is small (clear). A close value.

  In step S107, the transparency determination unit 33 determines the risk of occurrence of glare (the degree of possibility of occurrence of glare) from the ratio occupied by the cloud C using a table as shown in FIG. For example, as shown in FIGS. 2 and 5, the transparency determining unit 33 determines that the degree of risk is “low” when the ratio occupied by the cloud C is 0.7 or more (“risk” in step S107). Degree: low)), the process of step S108 is executed.

  In step S108, the transparency determining unit 33 determines the transparency of the light control glass 10 to the maximum value (substantially transparent). And the arithmetic unit 30 inputs the signal regarding the transparency (maximum value) determined in the transparency determination part 33 to the controller 40, and makes the transparency of the light control glass 10 the maximum value.

  Here, when the ratio occupied by the cloud C is 0.7 or more (“risk level: low” in step S107), the amount of the cloud C is large, and for a while (for example, the solar radiation shielding system 1 next) It is assumed that the sun S is covered with the cloud C until it operates. In this case, for a while from the present time, it is considered that direct sunlight hardly enters the window B1, and glare is hardly generated (the risk of occurrence of glare is low). Therefore, the transparency of the light control glass 10 is adjusted to the maximum value (step S108), so that the light incident from the window B1 is not shielded as much as possible. According to this, when the possibility of occurrence of glare is low, light can be taken in from the window B1 as much as possible.

  The arithmetic unit 30 ends the process of the solar shading system 1 after executing the process of step S108.

  In step S107, the transparency determining unit 33 determines that the degree of risk of occurrence of glare is “medium” when the ratio occupied by the cloud C is 0.3 or more and less than 0.7 (step S107). In “risk level: medium”), the process of step S109 is executed.

  In step S109, the transparency determining unit 33 determines the transparency to 20%. And the arithmetic unit 30 inputs the signal regarding transparency (20%) determined in the transparency determination part 33 into the controller 40, and makes the transparency of the light control glass 10 20%.

  Here, when the ratio occupied by the cloud C is 0.3 or more and less than 0.7 (“risk level: medium” in step S107), the cloud C is sparse, and the sun S is hidden by the cloud C at this time. Even if it is, it is assumed that the sun S will come out of the cloud C immediately. As described above, when the cloud C is sparse, even if the sun S is hidden behind the cloud C at this time, the direct sunlight enters the window B1 immediately (for example, until the next processing of the solar shading system 1). May cause glare. Therefore, the transparency is adjusted to 20% (step S109), and the light is blocked by the light control glass 10. According to this, since the transparency can be lowered in advance (before the sun S comes out of the cloud C and the direct sunlight enters the window B1), the occurrence of glare can be effectively suppressed. In addition, by setting the transparency to 20% (a value slightly higher than the minimum value that the light control glass 10 can adjust), even when the clouds C are sparse, it is possible to transmit light into the room while suppressing the occurrence of glare. You can capture as much as possible. Thereby, according to the ratio which the cloud C accounts, it can be set as an appropriate lighting state.

  The arithmetic unit 30 ends the process of the solar shading system 1 after executing the process of step S109.

  In step S107, the transparency determining unit 33 determines that the risk of occurrence of glare is “high” when the ratio occupied by the cloud C is less than 0.3 (“risk: high in step S107”). "), The process of step S110 is executed.

  In step S110, the transparency determining unit 33 determines the transparency to 10%. And the arithmetic unit 30 inputs the signal regarding transparency (10%) determined in the transparency determination part 33 into the controller 40, and makes the transparency of the light control glass 10 10%.

  Here, when the ratio occupied by the cloud C is less than 0.3 (“risk level: high” in step S107), the amount of the cloud C is small, and the sun S comes out from the cloud C for a while from the present time. It is assumed that In this case, it is considered that the direct sunlight is likely to enter the window B1 for a while from the present time, and the possibility of occurrence of glare is high. Therefore, the transparency of the light control glass 10 is adjusted to 10% (step S110), and the light incident from the window B1 is shielded as much as possible. According to this, when the possibility that the glare is generated is high, it is possible to effectively shield the direct sunlight incident on the window B1. Thereby, the occurrence of glare can be suppressed.

  The arithmetic unit 30 ends the process of the solar shading system 1 after executing the process of step S110.

  As described above, the transparency determination unit 33 predicts the possibility of occurrence of glare within 15 minutes (the risk of occurrence of glare) based on the ratio occupied by the cloud C (step S107). The transparency determining unit 33 divides the risk of occurrence of glare into three levels (“low”, “medium”, and “high”). Further, the arithmetic unit 30 and the controller 40 adjust the transparency to three levels (maximum value, 20% or 10%) according to the risk of occurrence of such glare (steps S108 to S110). Thereby, the arithmetic unit 30 and the controller 40 adjust the transparency in stages. According to this, control of the light control glass 10 by the controller 40 can be simplified.

  As described above, the solar radiation shielding system 1 according to the present embodiment is installed in the window B1 (opening) of the building B, and the light control glass 10 capable of changing the transparency, which is the ratio of shielding the light incident on the window B1. (The shielding means), the sky monitoring camera 20 (imaging means) that captures the sky above the building B and creates the image data D, and the transparency is adjusted in consideration of the amount of clouds C on the image data D An arithmetic device 30 and a controller 40 (adjustment means) are provided.

  With this configuration, the occurrence of glare can be suppressed.

  The arithmetic unit 30 estimates the amount of the cloud C in consideration of the color on the image data D.

  With this configuration, the cloud C can be easily identified from the image data D, and therefore the amount of the cloud C can be easily obtained.

  In addition, the arithmetic unit 30 and the controller 40 estimate the amount of the clear space F on the image data D in consideration of the color on the image data D, and consider the amount of the clear space F and the amount of the cloud C. Then, the ratio of the cloud C in the entire sky on the image data D is calculated, and the transparency is adjusted in consideration of the ratio of the cloud C.

  By configuring in this way, it becomes possible to adjust the transparency by judging the possibility of the occurrence of glare from the ratio occupied by cloud C (whether cloud C is sparse, etc.) (steps S107 to S110). Generation | occurrence | production can be suppressed effectively.

  Further, the arithmetic unit 30 and the controller 40 adjust the transparency step by step according to the proportion of the cloud C.

  By comprising in this way, since control of the light control glass 10 by the controller 40 can be simplified, transparency can be adjusted easily.

  The arithmetic unit 30 and the controller 40 adjust the transparency in a stepwise manner only when it is determined that direct sunlight is incident on the window B1.

  With this configuration, the transparency can be adjusted in stages only when there is a possibility of occurrence of glare (YES in step S103). Thereby, only when necessary, the process of analyzing the image data D and inputting the amount of the cloud C (steps S105 to S110) can be executed. According to this, the system can be operated without waste.

  The arithmetic unit 30 determines whether or not direct sunlight enters the window B1 in consideration of the date and time.

  With this configuration, it is possible to determine whether or not direct sunlight is incident on the window B1 using a value that can be easily obtained. According to this, it can be easily determined whether or not the direct sunlight is incident.

  Further, when the arithmetic unit 30 and the controller 40 determine that the direct sunlight does not enter the window B1, the transparency is set to the maximum value (the value at which the ratio of shielding the light incident on the window B1 is minimum). It adjusts so that it may become.

  With this configuration, when there is no possibility of occurrence of glare (YES in step S107), the transparency can be adjusted to the maximum value (step S108), so that a large amount of light can be captured from the window B1.

  The shielding means is constituted by the light control glass 10.

  By comprising in this way, since the exterior can be made easy to see from the window B1, a feeling of obstruction | occlusion can be reduced.

Note that the window B1 according to the present embodiment is an embodiment of the opening according to the present invention.
Moreover, the light control glass 10 which concerns on this embodiment is one Embodiment of the shielding means which concerns on this invention.
The sky monitoring camera 20 according to the present embodiment is an embodiment of the imaging means according to the present invention.
The arithmetic device 30 and the controller 40 according to the present embodiment are an embodiment of the adjusting means according to the present invention.
Further, the transparency according to the present embodiment corresponds to the shielding degree according to the present invention.

  The embodiment of the present invention has been described above, but the present invention is not limited to the above-described configuration, and various modifications can be made within the scope of the invention described in the claims.

  For example, the type of the building B to which the solar shading system 1 is applied is not limited to an office building, and may be an apartment, a house, a hospital, or the like.

  Moreover, the place where the light control glass 10 is installed is not limited to the window B1. The place where the light control glass 10 is installed should just be a place where direct sunlight injects among the opening parts of the building B. Specifically, it may be an entrance or a skylight leading to a veranda.

  Moreover, although the solar radiation shielding system 1 gave and demonstrated as an example the case where the light which injects into one window B1 was shielded (comprising one light control glass 10), it is not limited to this, A plurality The light incident on the window B1 may be shielded. In this case, for example, the light control glass 10 is installed so as to correspond to the plurality of windows B1 (one light control glass 10 is installed for one window B1). In the solar radiation information DB 34, a plurality of tables are created so as to correspond to the plurality of light control glasses 10 (one table is created for one light control glass 10). Moreover, the solar radiation determination part 31 searches the table corresponding to each light control glass 10, and acquires the presence or absence of the solar radiation in each window B1. Moreover, the arithmetic unit 30 and the controller 40 adjust the transparency of the some light control glass 10 by step S104 * S108-S110.

  Further, the shielding means is not limited to the light control glass 10, and may be, for example, a blind capable of changing the slat angle. In this case, the arithmetic unit 30 determines the ratio of shielding light with the blind in steps S104 and S108 to S110. The controller 40 controls the slat angle of the blind so that the ratio determined by the arithmetic device 30 is obtained. At this time, the controller 40 appropriately controls the slat angle from the altitude or position of the sun determined by the date and time. Thus, the shielding degree according to the present invention is a ratio of shielding light incident on the window B1. Specifically, the degree of shielding is the slat angle of the blind according to the transparency of the light control glass 10 and the date and time.

  Further, the place where the sky monitoring camera 20 is installed is not limited to the rooftop B2 as long as the sky can be photographed. Specifically, the place where the sky monitoring camera 20 is installed may be on the site of the building B or on the roof of a building different from the building B.

  In addition, the time for the sky monitoring camera 20 to capture the sky and the time for executing the processing of the solar shading system 1 are from the sunrise time to the sunset time, but are not limited thereto. It may be from the start time to the end time of the company or office in the office building.

  Moreover, the space | interval which image | photographs the sky with the sky monitoring camera 20, and the space | interval which performs the process of the solar radiation shielding system 1 are not limited to 15 minutes, It may be 10 minutes or 20 minutes. Further, the interval at which the sky monitoring camera 20 captures the sky and the interval at which the process of the solar shading system 1 is executed may be appropriately changed depending on the season or the like.

  Moreover, in step S103, the solar radiation determination unit 31 determines whether there is solar radiation 15 minutes after the current date and time (date and time after 15 minutes), but the time for determining whether there is solar radiation is: It is not limited to the date and time after 15 minutes. For example, the solar radiation determination unit 31 may determine whether there is solar radiation at the current date and time. Moreover, the solar radiation determination part 31 may each determine whether there is solar radiation in the present date and time and the date and time after 15 minutes. In this case, the solar radiation determination part 31 performs the process after step S105, for example, when it determines with solar radiation having at least one of the present date and time or the date and time after 15 minutes.

  Further, the solar radiation determination unit 31 determines whether or not the direct sunlight is incident on the window B1 when it is assumed to be clear at a certain date and time. It may be determined whether or not the sunlight is just before entering the window B1. In this case, for example, the solar radiation determination unit 31 determines whether or not it is immediately before the direct sunlight enters based on the measurement result of the illuminometer that measures the illuminance around the window B1. More specifically, the solar radiation determination unit 31 determines that the direct sunlight is incident when the measurement result of the illuminometer exceeds a predetermined threshold value, and the measurement result of the illuminometer becomes equal to or less than the predetermined threshold value. It is determined that it is not just before direct sunlight enters. According to this, it is possible to determine whether or not the direct sunlight enters the window B1 without using the solar radiation information DB 34. As described above, “direct sunlight is incident on the opening” according to the present invention means “direct sunlight is incident on the opening when it is assumed to be clear” and “direct sunlight is actually open. "Immediately before entering the part".

  Moreover, the arithmetic unit 30 does not necessarily have to determine whether there is solar radiation (execute the process of step S103).

  Further, when a predetermined building (building B or a building different from building B) is reflected in the image data D, the image analysis unit 32 considers the predetermined building and calculates the amount of clouds C and the amount of sunny space F. You may ask for it. Such a predetermined building is always photographed in the same way in the image data D. Therefore, the image analysis unit 32 extracts, for example, a color satisfying a predetermined condition from image data captured in advance by the sky monitoring camera 20 as a predetermined building color, and tabulates the number of pixels. In step S <b> 105, the image analysis unit 32 determines the number of pixels of the predetermined building color that is preliminarily calculated from the total value (number of pixels) of the color that matches the color of the predetermined building among the colors on the image data D. Is subtracted. Thereby, the color of a predetermined building can be removed from the image data D, and the amount of clouds C and the amount of sunny space F can be obtained. For this reason, the amount of the cloud C and the amount of the clear space F can be obtained with high accuracy, and as a result, the proportion of the cloud C can be obtained with high accuracy.

  Here, since the image data D is obtained by photographing the sky, many areas thereof are occupied by clouds C and sunny spaces F. For this reason, it is considered that the color having a large value (the number of pixels is large) calculated in step S105 is a color indicating the area of the cloud C or the sunny space F. On the other hand, a color with a very small value (small number of pixels) is considered to be a thing that cannot be assumed to be captured in advance, such as a flying object. Therefore, in step S105, the image analysis unit 32 extracts a predetermined number (ten types in the present embodiment) of colors having a large total value from among the colors on the image data D. According to this, since the color of the flying object or the like, that is, the color of the region other than the cloud C and the sunny space F can be excluded, the amount of the cloud C and the sunny space F can be accurately obtained. The number of colors extracted in step S105 is not limited to ten colors (up to the top ten), and may be nine colors or less or eleven colors or more, for example.

  In addition, the image analysis unit 32 counts the number of pixels for each identical RGB value. However, the present invention is not limited to this. For example, colors that are indistinguishable by the eyes are set to the same color (RGB value). May be aggregated).

  Further, the conditions for extracting the color of the cloud C and the color of the clear space F used in steps S105 and S106 are not limited to the conditions as in the present embodiment.

  Further, the method of calculating the ratio occupied by the cloud C is not limited to the present embodiment. For example, the transparency determination unit 33 may calculate the ratio of the cloud C by dividing the amount of the cloud C input in step S105 by the number of pixels of the entire image data D. By configuring in this way, it is possible to accurately calculate the proportion of the clouds C in the time zone (for example, the evening time zone) in which the color of the clear sky F is different from the light blue color. In addition, the method using the number of pixels of the entire image data D and the method using the amount of sunny space F as in step S107 according to the present embodiment may be properly used according to the time zone (for example, evening time). The ratio occupied by the cloud C may be calculated using the number of pixels of the entire image data D for the band). According to this, regardless of the time zone, the ratio occupied by the cloud C can be calculated with high accuracy.

  In addition, the image analysis unit 32 performs image processing (for example, edge processing for detecting an outline) on the image data D, obtains areas of the cloud C and the sunny space F, and calculates the area as the cloud C. And the amount of sunny space F may be used.

  In steps S107 to S110, the transparency of the light control glass 10 is adjusted based on the proportion of the cloud C. However, the present invention is not limited to this. For example, the light control glass 10 is based on the amount of the cloud C. You may adjust the transparency.

  In steps S107 to S110, the transparency is adjusted so that the maximum value is 20% or 10% (in three steps) according to the ratio occupied by the cloud C (in three steps). However, the present invention is not limited to this. is not. For example, the solar shading system 1 may adjust the transparency in four or more stages according to the ratio of the clouds C. Thereby, transparency can be adjusted more finely. Further, the transparency may be adjusted so as to be the maximum value or 10% according to the ratio occupied by the cloud C.

  Further, the transparency value adjusted in steps S104 and S108 to S110 is not limited to the value of the present embodiment (maximum value, 20% or 10%), and an arbitrary value can be set. .

  Further, the transparency determining unit 33 occupies the ratio of the cloud C calculated in the previous process of the solar shading system 1 (the ratio of the cloud C calculated 15 minutes ago, hereinafter referred to as “the ratio of the previous cloud C”). May be used to correct the transparency determined in steps S108 to S110.

  In such a configuration, for example, the transparency determining unit 33 determines the transparency determined in steps S108 to S110 as a provisional transparency value (maximum value, 20% or 10%). Then, the transparency determination unit 33 calculates the difference between the ratio occupied by the previous cloud C and the ratio occupied by the cloud C calculated in step S107, and when the difference is small (the change in the ratio occupied by the cloud C is small). Judge that the weather is stable. In this case, the transparency determining unit 33 determines a value higher than the temporary transparency value (a value obtained by adding a predetermined value to the temporary transparency) as the final transparency value. Then, the solar radiation shielding system 1 adjusts the transparency of the light control glass 10 so that it may become a final transparency value. According to this, when the weather is stable, the provisional transparency (transparency determined in steps S108 to S110) can be corrected so as to be increased, so that light can be taken in from the window B1 as much as possible. In addition, when the difference is small (the weather is stable), it is not necessary to frequently adjust the transparency. Therefore, the arithmetic unit 30 delays the next timing for processing the solar shading system 1. Specifically, processing at intervals of 15 minutes is set at intervals of 20 minutes. Thereby, the adjustment frequency of transparency can be reduced. When the temporary transparency value is the maximum value (step S108), the transparency determination unit 33 keeps the final transparency value at the maximum value (does not correct the temporary transparency value).

  Further, when the difference is large, the transparency determining unit 33 determines that the weather is unstable, and finally obtains a value lower than the temporary transparency value (a value obtained by subtracting the temporary transparency by a predetermined value). Determined as transparency value. And the solar radiation shielding system 1 adjusts the transparency of the light control glass 10 so that it may become the value of final transparency. According to this, when it is assumed that the weather is unstable, the provisional transparency can be corrected to be low, so that it is easy to block the direct sunlight incident on the window B1, so that the occurrence of glare is effective. Can be suppressed. Moreover, when the difference is large, the arithmetic unit 30 advances the timing for performing the next process of the solar shading system 1. Specifically, processing at intervals of 15 minutes is set at intervals of 10 minutes. Thereby, the transparency can be quickly adjusted in accordance with a sudden change in weather.

  Here, when the difference is calculated, it is determined that there is no solar radiation (“NO” in step S103) in the previous processing of the solar shading system 1, and the ratio of the previous cloud C may not be calculated. . In this case, the ratio of the cloud C may be calculated from the previously captured image data D before obtaining the difference.

  The process of correcting the transparency using the difference as described above is desirably performed when “risk level: medium” is obtained in step S107. Thus, when it is difficult to clearly determine the possibility of occurrence of glare due to sparse clouds, whether or not the weather is stable (not different from the ratio occupied by cloud C), not just the ratio occupied by cloud C. Information) can be used to finally determine the transparency. According to this, the transparency can be set to a more optimal value. In the process, the difference may be calculated using not only the ratio of the previous cloud C but also the ratio of the cloud C calculated before the previous time.

  As described above, the sky monitoring camera 20 repeatedly creates the image data D, and the arithmetic unit 30 and the controller 40 consider the amount of the cloud C on the latest image data D in consideration of the temporary transparency value. And determining the final transparency value by correcting the temporary transparency value in consideration of the temporal change in the amount of the cloud C on the image data D that has been repeatedly generated, The transparency is adjusted to be the final transparency value.

  By configuring in this way, the transparency can be adjusted in consideration of the temporal change of the cloud C.

  Further, the solar radiation information DB 34 is constructed in the computing device 30, but is not limited to this, and may be constructed in a PC different from the computing device 30. For example, the solar radiation information DB 34 may be constructed in a DB server that can be connected to the arithmetic device 30 via an Internet line or the like. Thereby, the load concerning the process of the solar radiation shielding system 1 can be disperse | distributed to several PC (the arithmetic unit 30 and DB server).

1 Solar radiation shielding system 10 Light control glass (shielding means)
20 Sky monitoring camera (imaging means)
30 arithmetic unit (adjustment means)
40 Controller (Adjustment means)
B Building B1 Window (opening)
D Image data

Claims (9)

Shielding means installed at the opening of the building and capable of changing the degree of shielding, which is the ratio of shielding light incident on the opening;
Imaging means for imaging the sky above the building and creating image data;
Adjusting means for adjusting the degree of shielding in consideration of the amount of clouds on the image data;
Comprising
Solar radiation shielding system. The adjusting means includes
Estimating the amount of the cloud in consideration of the color on the image data;
The solar radiation shielding system according to claim 1. The adjusting means includes
Estimating the amount of clearness on the image data taking into account the color on the image data;
In consideration of the amount of clear sky and the amount of clouds, the proportion of the clouds in the entire sky on the image data is calculated,
Adjusting the degree of shielding taking into account the proportion of the cloud,
The solar radiation shielding system according to claim 1 or 2. The adjusting means includes
The degree of shielding is adjusted step by step according to the proportion of the cloud.
The solar radiation shielding system according to claim 3. The adjusting means includes
Only when it is determined that direct sunlight is incident on the opening, the shielding degree is adjusted in stages.
The solar radiation shielding system according to claim 4. The adjusting means includes
Determine whether direct sunlight is incident on the opening in consideration of the date and time,
The solar radiation shielding system according to claim 5. The adjusting means includes
When it is determined that direct sunlight does not enter the opening, the shielding degree is adjusted to a minimum value,
The solar radiation shielding system according to claim 5 or 6. The imaging means includes
Create the image data repeatedly,
The adjusting means includes
Determine the provisional occlusion value in consideration of the amount of clouds on the latest image data,
By correcting the temporary shielding degree value in consideration of the temporal change in the amount of clouds on the image data that has been repeatedly created, the final shielding degree value is determined,
Adjusting the shielding degree to be the final shielding degree value;
The solar radiation shielding system as described in any one of Claim 1- Claim 7. The shielding means includes
Composed of light control glass,
The solar radiation shielding system as described in any one of Claim 1- Claim 8.

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