JP6970625B2 - Electric blind control system and control method - Google Patents

Description

The present invention relates to a technique for controlling an electric blind according to the surrounding environment.

Conventionally, a control device for controlling the degree of opening / closing of an electric blind has been known. Control of the electric blind by such a control device includes control based on the estimated altitude and direction of the sun, control based on the brightness determined from the image acquired by the camera, and the like.

As the latter type of control, an electric blind control device installed in an opening of a building, which is an image acquisition unit that acquires a gradation image in which the opening is captured by a camera, and an opening in the gradation image. The ratio of the solar radiation pixel to the opening region and the pixel determination unit that determines that the pixel is a solar radiation pixel that belongs to a predetermined solar radiation state based on the comparison between the gradation value in the corresponding opening region and the pixel threshold value. Is equal to or greater than the region threshold indicating a predetermined ratio, the area determination unit determines that the opening region belongs to the predetermined solar radiation state, and the region determination unit determines that the opening region belongs to the predetermined solar radiation state. , A control device for an electric blind having a solar radiation control unit for controlling an electric blind installed in an opening to an opening degree corresponding to a predetermined solar radiation state is known (see Patent Document 1).

According to this electric blind control device, the camera that images the opening of the building is installed so as to image the outdoor side of the blind from the room, and in this case, considering that the installation position of the equipment in the room is not restricted. It is appropriate to install it on the ceiling, which is outside the range of activity of the resident.

Japanese Unexamined Patent Publication No. 2013-168333

However, when the camera is installed on the ceiling of the room to take an image of the outside of the blind, that is, the periphery of the building, it is open due to the relationship between the angle of the slats and the depression angle of the camera in the vertical direction of the blind. There is a problem that there are regions that cannot be handled in the same way regarding the calculation of the solar radiation state in the opening region, that is, the region and the closed region. Here, the open area and the closed area will be described with reference to the drawings. FIG. 15 is a diagram showing an open region and a closed region in a conventional electric blind control system.

In FIG. 15, an electric blind 48 is provided for an opening 91 formed in the interior 9 of a building, a camera 99 for imaging the opening 91 from the indoor side is installed on the ceiling 90, and the image is taken by the camera 99. A control system for controlling an electric blind 98 based on the brightness in the image of the opening 91 is shown.

In this control system, it is desirable that the image of the opening 91 captured by the camera 99 is originally an image of the outside of the opening 91, in which case the control system is the brightness of the opening 91, that is, the building. The slat angle of the electric blind 98 is controlled based on the brightness of the light incident on the room from the outside.

However, the relationship between the depression angle and the slat angle of the camera 99 is not the same in the plurality of slats arranged in the vertical direction of the electric blind 98, whereby the open range and the closed range are roughly defined in the vertical direction of the plurality of slats. Will occur. Here, in the open range, the outside of the opening 91 is imaged relatively large with respect to the slats by approximating the depression angle and the slats angle of the camera 99 in the captured image, that is, the slats are in a relatively open state. It is a range of slats imaged as such. On the other hand, in the closed range, the outside of the opening 91 is imaged relatively small with respect to the slats due to the difference between the depression angle and the slats angle of the camera 99 in the captured image, that is, the slats are relatively closed. The range of slats imaged as in.

In this way, due to the relationship between the depression angle of the camera 99 and each of the plurality of slats, the open range and the closed range coexist in the plurality of slats, so that the captured image has a region in which the brightness greatly differs depending on the situation. There is a problem that the brightness of the opening 91 in which the electric blind 98 is installed cannot be correctly obtained due to the mixture, and the control accuracy of the electric blind 98 is reduced.

Therefore, the present invention has been made in view of such a problem, and an object thereof is to reduce restrictions on the installation position of indoor equipment while preventing a decrease in control accuracy of an electric blind. , To provide a control system and control method for electric blinds.

In order to solve the above problems, the control system for the electric blinds in the present embodiment is a horizontal electric blind control system installed in the opening of the building, and the opening and the above in the ceiling inside the room of the building. An image pickup device installed between the electric blind and an image pickup device for at least a part of the slats of the electric blind, and a region corresponding to the slats in the generated image obtained by acquiring the generated image captured by the image pickup device. A control device for controlling the opening degree of the electric blind based on the gradation value or the brightness value of the pixels in the slat region is provided.

According to the present invention, it is possible to reduce restrictions on the installation position of indoor equipment while preventing a decrease in control accuracy of the electric blind.

It is a schematic diagram which shows the whole structure of the control system of the electric blind which concerns on 1st Embodiment, and the hardware structure of a control device. It is a schematic side view which shows the positional relationship between an image pickup apparatus, a reflector, and an electric blind. It is a block diagram which shows the functional structure of a control device. It is a figure which shows the threshold value which is stored in the storage part. It is a flowchart which shows the whole operation of a control device. It is a schematic diagram which shows the image taken by the image pickup apparatus. It is a schematic diagram which shows the generated image based on the captured image. It is a schematic diagram which shows the slat area and the reflector area in the generated image. It is a flowchart which shows the operation of a determination process. It is a flowchart which shows the operation of the threshold value setting process. It is a flowchart which shows the operation of a pixel determination process. It is a flowchart which shows the operation of the area determination process. It is a flowchart which shows the operation of a control process. It is a flowchart which shows the operation of a glare process. It is a figure which shows the open area and the closed area in the control system of the conventional electric blind.

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

(Control system configuration)
The overall configuration of the control system of the electric blind according to the present embodiment and the hardware configuration of the control device in the control system will be described. FIG. 1 is a schematic diagram showing an overall configuration of a control system for an electric blind according to the present embodiment and a hardware configuration of a control device.

As shown in FIG. 1, the electric blind control system according to the present embodiment includes a control device 1, an image pickup device 2, a blind controller 3, an electric blind 4, and a reflector 5. The electric blind 4 is a blind installed on the indoor side with respect to an opening which is a window of a building, and the opening / closing state thereof is driven by a motor, and is a horizontal blind having a plurality of slats whose opening / closing angle can be adjusted. In the present embodiment, the control device 1 will be described as having one electric blind as a control target, but two or more electric blinds 4 may be installed. The reflecting mirror 5 is installed in the vicinity of the electric blind 4 in a posture in which the outdoor side can be imaged by the image pickup apparatus 2 from the opening in which the electric blind 4 is installed. The image pickup device 2 is installed on the indoor side and takes an image so as to include the electric blind 4 and the reflector 5.

The control device 1 controls the electric blind 4 according to the surrounding environment of the installed building based on the captured image captured by the image pickup device 2. Here, the control device 1 performs solar radiation control based on actual solar radiation to the window surface as control corresponding to the surrounding environment, and performs main control based on the altitude, direction, etc. of the sun when this solar radiation control is not necessary. .. Here, the main control transmits the open / closed state calculated from the altitude and direction of the sun to each blind. The blind controller 3 is provided corresponding to the electric blind 4, and controls the open / closed state of the corresponding electric blind 4 based on the control instruction by the control device 1.

The control device 1 includes a CPU (Central Processing Unit) 10, a memory 11, a storage unit 12, an input / output unit 13, and an I / O 14 as hardware. The CPU 10 and the memory 11 cooperate with each other to execute various functions described later. The storage unit 12 is a non-volatile storage device and stores a threshold value described later. The input / output unit 13 is a user interface for a control system administrator or user, including a keyboard and mouse as input units and a display as output units. The I / O 14 is a hardware interface for inputting / outputting signals to / from the image pickup device 2 and the blind controller 3 (including a repeater such as a floor control device or a tenant control device).

(Positional relationship between the image pickup device and the reflector)
The positional relationship between the image pickup device and the reflector will be described. FIG. 2 is a schematic side view showing the positional relationship between the image pickup device, the reflector, and the electric blind.

As shown in FIG. 2, the electric blind 4 is installed so that the opening 61 can be shielded from the ceiling 60 that defines the indoor space 6 above. Further, when the direction substantially orthogonal to the extending direction of each slat 41 provided in the electric blind 4 which is a horizontal blind is the front-rear direction, the outdoor direction side is the rear, and the indoor direction side is the front, the image pickup device 2 and the reflector. 5 is arranged behind the electric blind 4 in the front-rear direction. Here, the image pickup apparatus 2 is installed on the ceiling 60, and the reflector 5 is installed on the floor 62 that defines the indoor space 5 below.

Each slat 41 in the electric blind 4 has a substantially central portion in the front-rear direction in a fully open state, that is, a state in which the surface of each slat 41 faces in a substantially horizontal direction so as to maximize the amount of light incident into the room from the opening 61. It is formed in a convex shape curved so as to project upward. Further, in the electric blind 4, the convex surface is rearward, that is, the outdoor side in a fully closed state, that is, a state in which the surfaces of the slats 41 face substantially orthogonal directions so as to minimize the amount of light incident into the room from the opening 61. It is controlled to face.

The reflecting mirror 5 is formed as a convex mirror, whereby the mirror image can be reduced to project a wide range in a smaller area, and the installation space thereof can be reduced, and the installation position can be reduced. The degree of freedom can be improved. Further, the reflector 5 is arranged so as to reflect the outdoor sky so as to be able to be imaged by an image pickup device 2 installed on the ceiling 60, and in the present embodiment, the convex surface is inclined from the vertical direction to the outdoor side by a predetermined angle. It is in a posture to be done.

The image pickup apparatus 2 is arranged on the ceiling 60 so that the image pickup direction is downward and the image pickup range includes at least a part of the plurality of slats 41 in the electric blind 4 and the reflector 5. Further, the image pickup apparatus 2 may have a wide angle of view in order to capture a wide range of images, and in the present embodiment, the fisheye lens will be described as being used, but the image pickup device 2 is not limited to the fisheye lens.

(Functional configuration of control device)
The functional configuration of the control device will be described. FIG. 3 is a diagram showing a functional configuration of the control device. FIG. 4 is a diagram showing a threshold value stored in the storage unit.

As shown in FIG. 3, the control device 1 has, as functions, an image acquisition unit 101, an image generation unit 102, a position calculation unit 103, a pixel determination unit 104, a threshold value setting unit 105, an area determination unit 106, and a solar radiation control unit 107. It includes an opening degree control unit 108 and a glare processing unit 109. The image acquisition unit 101 acquires an image captured by the image pickup device 2. The image generation unit 102 generates a gradation image or a luminance distribution image based on the captured image acquired by the image acquisition unit 101. The position calculation unit 103 calculates the positions of the slat region corresponding to the slat 41 of the electric blind 4 and the reflector region corresponding to the reflector 5 in the gradation image or the luminance distribution image generated by the image generation unit 102. The pixel determination unit 104 determines the pixels in the slat region based on the pixel value as the threshold value. The threshold value setting unit 105 sets a threshold value used for determination by the pixel determination unit 104. The area determination unit 106 determines the ratio of pixels determined by the pixel determination unit 104 based on the ratio as a threshold value. The solar radiation control unit 107 instructs the opening degree control unit 108 to execute the solar radiation control described later based on the determination result by the area determination unit 106. The glare processing unit 109 determines an evaluation value based on the pixels in the reflector region based on a predetermined threshold value. The opening control unit 108 executes solar radiation control when instructed by the solar radiation control unit 107 or the glare processing unit 109, and when there is no instruction, the electric blind 4 is based on a preset sun altitude, direction, or the like. Executes the main control that controls the open / closed state of.

The solar radiation control instructed by the solar radiation control unit 107 or the glare processing unit 109 includes shade control corresponding to a slat portion located in the shade such as a building shade, and sun control and a slat portion corresponding to the slat portion located in the sun. This includes glare control corresponding to glare that may occur due to the difference in brightness between the brightness of the sky and the brightness of the sky, and whether or not these controls can be executed based on the threshold value stored in the storage unit 12 as shown in FIG. Is determined. Specifically, whether or not shade control can be executed is determined based on the shade threshold value and the shade region threshold value, and whether or not the shade region control can be executed is determined based on the sunflower threshold value and the sunflower region threshold value. Whether or not glare control can be executed is determined based on this. Here, the shade threshold and the sun threshold are gradation values or luminance values whose values are different from each other, and the shade threshold is set to a value lower than the sun threshold. The values of the shade area threshold value and the shade area threshold value are different from each other, and the shade area threshold value is set to a value higher than the shade area threshold value.

(Operation of control device)
The operation of the control device will be described. FIG. 5 is a flowchart showing the overall operation of the control device. FIG. 6 is a schematic view showing an image captured by an image pickup device. FIG. 7 is a schematic view showing a gradation image based on a captured image. FIG. 8 is a schematic view showing a slat region and a reflector region in a gradation image. It is assumed that the entire operation shown in FIG. 5 is executed at predetermined time intervals.

As shown in FIG. 5, first, the image acquisition unit 101 acquires an image captured by the image pickup device 2 (S101). Here, as shown in FIG. 6, the captured image is captured so as to include at least a part of the slats 41 in the electric blind 4 to be controlled, the reflector 5, and their peripheral regions.

In addition, regardless of the open / closed state of the slat 41 of the electric blind 4, at least the image pickup device 2 arranged above the arrangement position of the slat 41 takes an image of the slat 41 with the image pickup direction facing downward. In the captured image, the space on the indoor side is more difficult to be reflected from between the slats 41 than on the electric blind 4, but in order to prevent the space on the indoor side from being more reliably reflected between the slats 41, the slats of the electric blind 4 are captured when the image pickup device 2 is used. It is good to control the angle in the fully closed direction.

After acquiring the captured image, the image generation unit 102 generates an image as shown in FIG. 7 based on the captured image (S102). Here, in the present embodiment, the following description will be made assuming that the captured image is generated as a gradation image. The gradation image is an 8-bit grayscale format image, and the gradation value of each pixel is represented in 256 steps from 0 to 255. Next, the position calculation unit 103 calculates the positions of the slat portion and the reflector portion in the gradation image, and as shown in FIG. 8, the pixel region corresponding to the slat portion is set as the slat region, and the position calculation unit 103 corresponds to the reflector portion. The area of the pixel to be used is defined as the reflector area (S103). Here, the positions of the slat portion and the reflector portion are labeled by determining pixels having a gradation value equal to or higher than a threshold value suitable for discriminating between the slat portion and the reflector portion and the wall surface around the slat portion and the reflector portion. It is calculated by setting a shape that includes all the areas. By extracting only the reflector region, it can be used for control of determining fine weather or cloudy weather.

After calculating the position of the opening, the determination process (S104) and the control process (S105), which will be described later, are sequentially executed.

(Determination process)
The operation of the determination process will be described. FIG. 9 is a flowchart showing the operation of the determination process.

As shown in FIG. 9, first, a threshold value setting process for setting a shade threshold value, a sunbeam threshold value, and a glare threshold value is executed by the threshold value setting unit 105 (S201), and all the pixels in the slat region are set to the shade threshold value and the sunflower threshold value. The pixel determination process for determination based on is executed by the pixel determination unit 104 (S202), and the ratio of the pixels determined by the pixel determination unit 104 in the slat area is determined based on the shade area threshold value and the sunbathing area threshold value, and the determination is made. The area determination process for giving a control instruction based on the above is executed by the area determination unit 106 and the solar radiation control unit 107 (S203). The specific operations of the threshold value setting process, the pixel determination process, and the area determination process will be described in detail later.

(Threshold setting process)
The operation of the threshold value setting process executed in the determination process will be described. FIG. 10 is a flowchart showing the operation of the threshold value setting process.

As shown in FIG. 10, first, the difference in brightness in the slat region of the gradation image is calculated (S301). Here, the difference in brightness is a value obtained by subtracting the gradation value having the smallest value from the gradation value having the largest value in all the pixels in the slat region. For this difference in brightness, a plurality of pixels are selected for each of the upper and lower pixels with respect to the magnitude of the gradation value, and the average value of the gradation values of the lower pixels is calculated from the average value of the gradation values of the upper pixels. It may be calculated by subtraction.

After calculating the light / dark difference, the threshold value setting unit 105 multiplies the light / dark difference by the shade coefficient (S302). Here, the shade coefficient is a preset coefficient, and is set to a value such that the result of multiplying the difference in brightness falls within the range of 0 to 255, and is at least a value smaller than the Hinata coefficient and the glare coefficient described later. .. Next, the threshold value setting unit 105 sets a value obtained by multiplying the difference in brightness by the shade coefficient as the shade threshold (S303).

After setting the shade threshold value, the threshold value setting unit 105 multiplies the difference in brightness by the Hinata coefficient (S304). Here, the Hinata coefficient is a preset coefficient like the shade coefficient, and is set to a value such that the result of multiplying the difference in brightness is within the range of 0 to 255. Further, the Hinata coefficient is at least larger than the shade coefficient and smaller than the glare coefficient described later. Next, the threshold value setting unit 105 sets the value obtained by multiplying the difference in brightness by the Hinata coefficient as the Hinata threshold value (S305).

After setting the Hinata threshold value, the threshold value setting unit 105 multiplies the difference in brightness by the glare coefficient (S306). Here, the glare coefficient is a preset coefficient like the shade coefficient and the sunshine coefficient, and is set to a value such that the result obtained by multiplying the difference in brightness is within the range of 0 to 255. Further, the glare coefficient shall be at least a value larger than the Hinata coefficient. Next, the threshold value setting unit 105 sets a value obtained by multiplying the difference in brightness by the glare coefficient as the glare threshold value (S307).

In this way, by setting the shade threshold value, the sunlight threshold value, and the glare threshold value based on the difference in brightness, which is the difference between the maximum gradation value and the minimum gradation value in the opening region, the threshold value is set so as to correspond to the amount of solar radiation. It can be variable. For example, when the difference in brightness is small, the amount of solar radiation tends to be small, so it is possible to cope with the decrease in the amount of solar radiation by lowering each threshold value. In the threshold value setting process according to the present embodiment, the threshold value is calculated by multiplying the light / dark difference by a coefficient. However, when the light / dark difference increases between the light / dark difference and the threshold value, the threshold also increases. As long as the correlation between the above is maintained, the threshold value may be obtained by any method based on the difference in brightness.

(Pixel judgment processing)
The operation of the pixel determination process executed in the determination process will be described. FIG. 11 is a flowchart showing the operation of the pixel determination process.

As shown in FIG. 11, first, the pixel determination unit 104 selects one pixel from all the pixels included in the slat region in the gradation image (S401), and the gradation value of the selected pixel is the shade threshold value. It is determined whether or not it is as follows (S402).

When the gradation value is not equal to or less than the shade threshold value (S402, NO), the pixel determination unit 104 determines whether or not the gradation value of the selected pixel is equal to or greater than the sunflower threshold value (S403).

When the gradation value is not equal to or more than the Hinata threshold value (S403, NO), the pixel determination unit 104 determines whether or not all the pixels included in the slat region in the gradation image are selected (S404). When all the pixels are selected (S404, YES), the pixel determination unit 104 ends the pixel determination process.

On the other hand, when all the pixels are not selected (S404, NO), the pixel determination unit 104 selects one unselected pixel from all the pixels included in the slat area in the gradation image (S401). ).

Further, in the determination of step S403, when the gradation value is equal to or higher than the Hinata threshold value (S403, YES), the pixel determination unit 104 determines that the selected pixel is a Hinata pixel (S405), and the slat region in the gradation image is used. It is determined whether or not all the included pixels are selected (S404).

Further, in the determination of step S402, when the gradation value is equal to or less than the shade threshold value (S402, YES), the pixel determination unit 104 determines that the selected pixel is a shade pixel (S406), and all openings in the gradation image. It is determined whether or not all the pixels included in the part region are selected (S404).

In this way, by making a determination based on the shade threshold value and the sunbeam threshold value for all the pixels in the slat region in the gradation image, the pixels in the slat region are shaded pixels, sunflower pixels, or pixels that do not belong to these. It is classified as one of.

(Area judgment processing)
The operation of the area determination process executed in the determination process will be described. FIG. 12 is a flowchart showing the operation of the area determination process.

As shown in FIG. 12, the area determination unit 106 first determines whether or not the proportion of the sunflower pixels in the slat area is equal to or greater than the sunflower area threshold value (S501).

When the proportion of the sunlit pixels is not equal to or greater than the sunlit area threshold value (S501, NO), the region determination unit 106 determines whether or not the proportion of the shaded pixels in the selected slat region is equal to or greater than the shaded region threshold value (S502). ).

When the proportion of the shaded pixels is equal to or greater than the shaded area threshold value (S502, YES), the solar radiation control unit 107 controls the opening degree control unit 108 to shade the electric blind 4 corresponding to the selected opening area. Instructed (S503) to end the area determination process.

On the other hand, when the ratio occupied by the shaded pixels is not equal to or more than the shaded area threshold value (S502, NO), the area determination unit 106 ends the area determination process.

Further, in the determination of step S501, when the ratio occupied by the sunflower pixels is equal to or greater than the sunflower area threshold value (S501, YES), the solar radiation control unit 107 instructs the opening degree control unit 108 to control the sun (S504). , Terminates the area determination process.

In this way, by comparing the ratio occupied by the sun and shade pixels in the slat region with the region threshold value, it is possible to perform solar radiation control based on actual solar radiation to the window surface. Further, by performing the determination in the order of the sun pixel and the shade pixel, the instruction is given priority in the order of the sun control and the shade control.

(Control processing)
The operation of the control process executed in the overall operation of the control device will be described. FIG. 13 is a flowchart showing the operation of the control process.

As shown in FIG. 13, first, the opening degree control unit 108 determines whether or not the sun control is instructed (S601).

When the sun control is not instructed (S601, NO), the opening degree control unit 108 determines whether or not the shade control is instructed (S602).

When the shade control is not instructed (S602, NO), the opening degree control unit 108 controls the slat 41 of the electric blind 4 to the slat angle corresponding to the sun position (S603), and ends the control process.

On the other hand, when the shade control is instructed (S602, YES), the opening degree control unit 108 executes the shade control for the electric blind 4 (S604), and ends the control process. Here, in the shade control, the slat angle of the slat 41 is set to the horizontal state and the electric blind 4 is controlled to the fully open state, but the slat angle controlled based on the sun position is controlled by a predetermined amount in the open direction. You can do it.

Further, in the determination of step S601, when the sun control is instructed (S601, YES), the opening control unit 108 executes the sun control for the electric blind 4 (S605), and executes the glare process described later. (S606), and the control process is terminated. Here, the sun control controls the electric blind 4 to a slat angle that provides the maximum view while blocking direct sunlight, but closes the slat angle controlled based on the sun position by a predetermined amount. It may be controlled in the direction.

(Glare processing)
The glare processing executed in the control processing will be described. This glare process is a process that is executed after the sun control and controls the electric blinds in response to the glare that occurs in the room. FIG. 14 is a flowchart showing the operation of glare processing. In this process, it is assumed that the electric blind is selected in advance and the sun control is executed for the selected electric blind.

As shown in FIG. 14, first, the glare processing unit 109 acquires an image of the reflector region in the gradation image (S701), estimates the sky brightness based on the image of the reflector region (S702), and this A glare evaluation value is calculated based on the sky brightness (S703), and it is determined whether or not this glare evaluation value is equal to or higher than the glare threshold (S704).

Here, the sky brightness is estimated by calculating the average of the brightness values of all the pixels in the reflector region. The brightness of each pixel in the reflector region may vary, but by calculating the average of these pixels, the brightness of the outdoor sky can be estimated accurately. Further, the glare evaluation value is a value adjusted by multiplying the sky brightness by a predetermined coefficient, and this predetermined coefficient is set so that the glare evaluation value exceeds the glare threshold value when unpleasant glare occurs. Set. Therefore, the glare evaluation value is based on the brightness value of the pixel in the reflector region and the brightness value of the pixel in the slat region based on the glare threshold value.

When the glare evaluation value is equal to or higher than the glare threshold value (S704, YES), the glare processing unit 109 determines that unpleasant glare has occurred and instructs the opening control unit 108 to perform glare control (S705) to control the opening. Unit 108 performs glare control (S706) and ends the glare process. Here, the glare control is a control that changes the slat angle of the slat 41 in a direction of closing by a predetermined amount with respect to the opening degree controlled by the Hinata control.

On the other hand, when the glare evaluation value is not equal to or higher than the glare threshold value (S704, NO), the glare processing unit 109 ends the glare processing.

As described above, by determining the gradation value of the pixels in the slat region and determining the ratio occupied by the determined pixels, the solar radiation to the slat 41 of the electric blind 4 is in either the sun or the shade. It is possible to determine whether or not, and it is possible to control the electric blind 4 in response to these states. Further, by performing glare control based on the sky brightness obtained from the pixels in the reflector region for the electric blind 4 in which the sun control is executed, an unpleasant glare due to a difference in the amount of light is generated. Can be accommodated.

As described above, according to the present embodiment, the opening 61 is shaded by the influence of the eaves and sleeve walls installed in the neighboring building or the own building, or the direct sunlight from the sun is applied to the opening 61. Even though it is not irradiated, it is possible to control the blinds in response to changes in the surrounding environment, such as the reflected light shining on the opening 61 due to the influence of neighboring buildings and the ground. Further, by arranging the image pickup device 2 on the ceiling 60 and controlling the electric blind 4 based on the image obtained by imaging the slats 41, the image pickup device 2 is arranged on the indoor side of the electric blind 4 and the opening 61 is imaged. Compared with the case where the electric blind 4 is controlled based on the image, it is possible to reduce the restriction on the installation position of the equipment in the room while preventing the control accuracy from being reduced.

Although embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. This novel embodiment can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

1 Control device 2 Imaging device 4 Electric blind 5 Reflector 12 Storage unit 101 Image acquisition unit 102 Image generation unit 103 Position calculation unit 104 Pixel determination unit 105 Threshold setting unit 106 Area determination unit 107 Solar radiation control unit 108 Opening control unit 109 Glare Processing unit

Claims (5)

It is a control system for horizontal electric blinds installed in the opening of a building.
An imaging device installed between the opening and the electric blind on the ceiling in the room of the building to image at least a part of the slats of the electric blind.
Control to acquire the generated image captured by the image pickup apparatus and control the opening degree of the electric blind based on the gradation value or the brightness value of the pixels in the slat area which is the region corresponding to the slat in the generated image. A control system equipped with a device. A reflector is further provided between the opening and the electric blind so that the outdoor sky is arranged in a posture that can be imaged by the imaging device through the opening.
The imaging device captures at least a part of the slats and the reflecting mirror.
The control device opens the electric blind based on the gradation value or the luminance value of the pixel in the slat region and the gradation value or the luminance value of the pixel in the reflecting mirror region which is the region corresponding to the reflecting mirror. The control system according to claim 1, wherein the degree is controlled. The control device is
A pixel that determines that the pixel is a solar radiation pixel that belongs to a predetermined solar radiation state based on a comparison between the gradation value or the luminance value of the pixel in the slat region and the pixel threshold indicating a predetermined gradation value or the luminance value. Judgment unit and
When the ratio of the solar radiation pixels to the slat region is equal to or higher than the region threshold value indicating the predetermined ratio, the region determination unit for determining that the slat region belongs to the predetermined solar radiation state.
1. The control system according to claim 2. The control device is
The glare evaluation value was calculated based on the gradation value or the brightness value of the pixels in the reflector region, and the glare evaluation value was set based on the difference in the gradation value or the brightness value between the pixels in the slat region. When it is equal to or higher than the glare threshold, it is determined that unpleasant glare has occurred in the electric blind, and when it is determined that unpleasant glare has occurred, the glare process for controlling the electric blind to an opening corresponding to the unpleasant glare. The control system according to claim 2, further comprising a unit. It is a control method for horizontal electric blinds installed in the opening of a building.
At least a part of the slats of the electric blind is imaged by an image pickup device installed between the opening and the electric blind on the ceiling in the room of the building, and the imaged generated image is acquired. A control method for controlling the opening degree of the electric blind based on the gradation value or the brightness value of the pixels in the slat area, which is a region corresponding to the slat.

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