JP4676298B2 - Electric blind control device - Google Patents

Description

The present invention relates to a control device for an electric blind that automatically controls an electric blind using a sunshine detection device for detecting the presence or absence of sunshine .

  2. Description of the Related Art Conventionally, as a control device for an electric blind that performs control according to the weather, one described in Patent Document 1 (Japanese Patent Laid-Open No. 2-108784) is known. In the control device described in this publication, after the output from the solar radiation amount detector is amplified by an amplifier, it is compared with a reference voltage by a comparator to determine whether it is sunny or cloudy (or rain), and according to the determination result. The slat angle of each blind is adjusted.

  By providing the sunshine determination function in this way, the blind can be controlled in accordance with the state corresponding to sunny and cloudy.

  However, although the weather judgment by the said patent document 1 is performed based on the comparison between the output from the solar radiation amount detector and a reference voltage corresponding to a predetermined reference value by a comparator, such as noon and just before sunset. The illuminance value in the clear state changes when the time zone and seasons such as summer and winter are different, and it may be clear even if the illuminance value is low, it may be cloudy even if the illuminance value is high, There is a problem that a simple comparison between the output from the solar radiation detector and a predetermined reference voltage causes an erroneous determination. In addition, even when the sun is actually hidden behind a thin cloud and there is no direct sunlight, and the illuminance is high, so-called light cloudy, it may be erroneously determined as clear.

  For example, although it is sunny, it is erroneously determined as cloudy, and if the opening degree of the blind is controlled to be high, there is a problem that sunlight directly enters the room and gives the user an unpleasant feeling. is there.

  On the other hand, a solar tracking type sensor described in Patent Document 2 is known as an apparatus that detects direct light with high accuracy. In this solar tracking type sensor, a solar illuminator is mounted with a first illuminometer. The first illuminance meter can be tracked, the light receiving angle of the first illuminance meter is set to a narrow angle necessary for receiving direct light, and the second illuminance meter is installed so that direct light cannot be received. The presence or absence of direct light is detected from the comparison value of the detected illuminance between the second illuminometer and the second illuminometer.

  However, in such a sun tracking type sensor, a solar light tracking device and two illuminance meters are indispensable, and there is a problem that it becomes an expensive device as a whole.

Japanese Patent Laid-Open No. 2-108784 JP 2005-3524 A

The present invention has been made in view of these problems, it is possible to accurately determine whether there is sunshine, and the entire apparatus of sunshine detecting device that can be configured at a low cost electric blind using It is an object of the present invention to provide a control device.

In order to achieve the above-described object, a control device for an electric blind according to claim 1 includes a plurality of illuminance sensors arranged in different directions and direct light from the direction in which the sun exists to each illuminance sensor. Relative motion with respect to each illuminance sensor so as to pass at least a first relative position that shields incident light and a second relative position that does not shield direct light incident on each illuminance sensor from the direction in which the sun exists A sunshine detection device comprising a shielding member for performing
Sunshine determination means for determining the presence or absence of sunshine from the relationship between the illuminance value from the illuminance sensor and the relative position between the illuminance sensor and the shielding member,
The illuminance value used to determine the presence or absence of sunshine is an illuminance value from one illuminance sensor selected from a plurality of illuminance sensors according to the position of the sun .

  According to a second aspect of the present invention, the shielding member according to the first aspect is a member that rotates around a plurality of illuminance sensors at a predetermined cycle, and the shielding member rotates and is disposed between the sun and the illuminance sensor. The position is the first relative position.

  The invention described in claim 3 is characterized in that the shielding member described in claim 1 or 2 moves in a direction parallel to the moving direction of the sun.

The inventions of claim 4, wherein, in the control device of the electric blind according to any one of claims 1 to 3,
Characterized in that it comprises automatic control means to output a control signal of the electric blind based on sunshine existence determination result by the sunshine determining means.

According to a fifth aspect of the present invention, there is provided an illuminance sensor in which the sunshine determining means according to any one of the first to fourth aspects is obtained from an illuminance value from an illuminance sensor selected from a plurality of illuminance sensors. Whether there is sunlight from the direct illuminance value, which is the difference between the total sky illuminance value whose illuminance is not affected by the shielding member and the scattered illuminance value where the illuminance sensor is shielded from direct light from the sun by the shielding member It is characterized by determining.

  The invention described in claim 6 is characterized in that the sunshine determination means according to claim 5 uses a comparison result between the direct illuminance value and a preset set value as the sunshine presence / absence determination result.

  The invention according to claim 7 is characterized in that the automatic control means according to claim 6 increases the blind opening when the direct illuminance value is smaller than a set value.

  The invention according to claim 8 is characterized in that the automatic control means according to claim 6 or 7 controls the opening of the blind to an opening that shields solar radiation when the direct illuminance value is larger than a set value. Features.

  According to the present invention, the first relative position that shields the incidence of direct light from the direction of the sun on the illuminance sensor and the second that does not shield the incidence of direct light from the direction of the sun on the illuminance sensor. There is a significant difference between the relative position relationship between the illuminance sensor and the shielding member, such as the relative position, and the illuminance detected by the illuminance sensor between when the sun is out and when it is not out. Therefore, the presence or absence of sunshine can be accurately determined based on this difference.

Since it is composed of an illuminance sensor and a shielding member, a sunshine detection device can be constructed at low cost.
In addition, by switching the illuminance sensor that adopts the illuminance value among a plurality of illuminance sensors facing different directions depending on the position of the sun, the first position can be changed regardless of changes in the position (azimuth, elevation angle) of the sun. One relative position can be made as constant as possible, and the measurement conditions can be made as constant as possible. Therefore, detection can be performed with higher accuracy.

  According to the second aspect of the present invention, the first relative position can always be realized regardless of changes in the position of the sun by rotating the shielding member around the illuminance sensor at a predetermined period. Moreover, it can comprise at low cost by rotating a shielding member.

  According to the invention described in claim 3, the first relative position and the second relative position are always realized regardless of the change in the position of the sun by moving the shielding member in the direction parallel to the moving direction of the sun. Can do.

  According to the fourth aspect of the present invention, since the sunshine detection device including the plurality of illuminance sensors and the shielding member is used, the control device for the electric blind can be constructed at low cost.

  According to the inventions of claims 5 and 6, if there is sunshine, the direct illuminance value that is the difference between the whole sky illuminance value and the scattered illuminance value is large, and if there is no sunshine, the direct illuminance value should be small. Therefore, the direct illuminance value can be obtained by changing the relative position of the illuminance sensor and the shielding member, and the presence or absence of sunshine can be determined from the direct illuminance value.

  According to the invention described in claim 7, since it is considered that there is no sunshine when the direct illuminance value is small, in that case, it is possible to increase the opening of the blind and control it to incorporate a large amount of external light. . Therefore, energy consumption such as lighting and air conditioning can be reduced.

  According to the invention described in claim 8, since it is considered that there is sunshine when the direct illuminance value is large, in that case, a comfortable indoor environment is provided by controlling the blind opening to an opening that shields solar radiation. Energy consumption such as air conditioning can be reduced.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic configuration diagram including a sunshine detecting device 12 according to the present invention, a control device for an electric blind using the sunshine detecting device 12, and an electric blind. In the figure, reference numeral 10 denotes a control device for an electric blind, and the control device 10 mainly includes a central control device 13 in addition to the sunshine detection device 12.

  Moreover, the control apparatus 10 is connected to the blind control apparatus 18 of the electric blind 16 arrange | positioned for every floor via the floor control apparatus 14 installed for every floor. The electric blind 16 may be any electric opening / closing device such as a horizontal blind, a low screen, a curtain, and a shutter.

  As shown in FIG. 3, the sunshine detection device 12 has a basic configuration in which the first illuminance sensor 52 arranged upward (for example, the zenith direction) and the horizontal direction (for example, the west direction) are arranged. A second illuminance sensor 53 and a strip-shaped shielding plate 54 which is a shielding member capable of moving relative to each of the illuminance sensors 52 and 53 are provided. In order to generate a relative motion between each of the illuminance sensors 52 and 53 and the shielding plate 54, any one or both of them can be driven, but preferably, only the shielding plate 54 can be driven easily. It can be configured at low cost. In this embodiment, a stepping motor 56 with a reduction gear, which is a driving means for driving the shielding plate 54, is provided (FIG. 2A).

  The first illuminance sensor 52 and the second illuminance sensor 53 are fixed to the front end of a bracket 55a extending from the motor case 55 so as to face different directions (for example, directions orthogonal to each other as described above). The motor 56 is accommodated in the motor case 55, and its output shaft 56a projects from the motor case 55, and the base of the shielding plate 54 is connected to the output shaft 56a.

  The shielding plate 54 is a thin black piece, and the side surface shape basically has an arc shape. The shape formed by the movement path of the shielding plate 54 driven to rotate by the motor 56 is a spherical surface. The illuminance sensors 52 and 53 are preferably positioned at the center position of the spherical surface. And as shown in FIG.8 and FIG.9, the moving direction of the shielding board 54 is parallel to the moving direction of the sun.

  The sunshine detection device 12 further includes a motor drive circuit 57 for controlling the drive of the motor 56 and an arithmetic device 58 in the motor case 55 as shown in FIG. 2A.

  During the measurement operation of the sunshine detection device 12, the motor drive circuit 57 drives the motor 56 to rotate at a predetermined speed at a predetermined cycle, and the signals from the illuminance sensors 52 and 53 and the rotation angle signal from the motor drive circuit 57 are calculated. Input to device 58. As shown in FIG. 2B, the arithmetic device 58 records an A / D converter 59, a date / time memory 60 for recording the current date / time, and the elevation angle and direction of the sun associated with the date / time and latitude / longitude. The solar position memory 62 and the direct illumination intensity calculating part 64 which calculates a direct illumination intensity value are provided.

  As shown in FIG. 7, the arithmetic unit 58 is configured to illuminate at a constant time interval (for example, a time interval corresponding to a rotation angle of 1 degree of the shielding plate 54) while the shielding plate 54 makes one rotation. Illuminance data representing the amount of solar radiation received from the sensors 52 and 53 is taken in, and is temporarily stored in a memory in association with the rotation angle data representing the rotation angle of the motor at that time. The direct illuminance value is obtained from the data.

  A signal from the sunshine detection device 12 is connected to the central control device 13 via the floor control device 14.

  As shown in detail in FIG. 2A, the central control unit 13 is configured by a computer and includes a CPU, a ROM, a RAM, and the like, and transfers data, performs calculations, stores temporary data, or stores a main program according to a program. A control circuit 28 for performing data input / output, an I / O control circuit 30 for controlling input / output of data to / from the blind control device 18 via the floor control device 14, and a memory 34 for storing data and programs. I have.

  Furthermore, the control circuit 28 includes an automatic control means 38 that performs automatic control processing of the degree of opening and closing of the electric blind 16 at regular intervals, and a sunshine determination means 40.

  The operation of the sunlight detecting device 12 configured as described above and the control device 10 using the same will be described.

  FIG. 4 is a flowchart showing a process performed by the direct illuminance calculation unit 64 in the sunshine detection device 12. First, the current date and time is acquired from the date and time memory 60, and the sun position (elevation angle and azimuth) corresponding to the current date and time is obtained by referring to the sun position memory 62 (step S12).

  Next, the illuminance data of the illuminance sensor to be used is determined from the illuminance data from the plurality of stored illuminance sensors for the current solar position (step S13). With this determination, for example, when the first illuminance sensor 52 is facing the zenith direction and the second illuminance sensor 53 is facing the west direction as in this example, the first illuminance sensor 52 faces the first position from the sunrise of the sun. The illuminance data of the second illuminance sensor 53 can be used from the predetermined position of the sun to the sunset using the illuminance data of the illuminance sensor 52. The predetermined position of the sun for switching the illuminance sensor to be used is determined by an azimuth angle or elevation angle as shown in FIG. 7 (a), or a function value determined by the azimuth angle and elevation angle as shown in FIG. 7 (b). Can do.

  Next, with respect to the illuminance data from the illuminance sensor decided to be used, the illuminance data at the first relative position where the center of the shielding plate 54 is on a straight line connecting the position of the sun and the illuminance sensor, and the shielding plate Illuminance data at the second relative position where 54 is in another position is captured (step S14). The second relative position is not limited to one position, and may be a plurality of positions, and may be one or more positions having a predetermined relative positional relationship with respect to the first relative position. 8 shows an example of the first relative position and the second relative position when the illuminance sensor 52 is used, and FIG. 9 shows an example of the first relative position and the second relative position when the illuminance sensor 53 is used.

  Then, the direct illuminance calculation unit 64 uses the illuminance data at the first relative position and the illuminance data at the second relative position, and the total sky illuminance value A where the shielding plate 54 does not affect the illuminance sensors 52 and 53 at all. The scattered illuminance value B by scattered light other than the direct light in which the direct light of the sun is shielded by the plate 54 is obtained (step S16). Basically, the sky illuminance value A is obtained based on the illuminance data at the second relative position, and the scattered illuminance value B is obtained based on the illuminance data at the first relative position. However, in order to increase the accuracy, correction may be performed using illuminance data at each other position, for example, illuminance data at a third relative position at an intermediate position between the first relative position and the second relative position. Is possible.

Next, a difference between the sky illuminance value A and the scattered illuminance value B is obtained (step S18). That is,
[Equation 1]
ΔI = | A−B | / cos θ (θ: zenith angle = 90 degrees−elevation angle) (1)

It becomes. This direct illuminance value ΔI represents direct solar radiation from the sun. cos θ is for correcting the influence of the elevation angle of the sun at the first relative position. This direct illuminance value ΔI is output as a detection signal (step S20).

  A detection signal from the sunshine detection device 12 is input to the central control device 13 via one floor control device 14. It is possible to directly input the detection signal to the central control device 13 without going through the floor control device 14. However, once the detection signal is input to one floor control device 14, The load on the control device 13 is reduced. The central controller 13 can capture the direct illuminance value ΔI via the floor controller 14 or can capture the direct illuminance value ΔI stored in the floor controller 14 at a constant cycle.

  The automatic control means 38 of the central control device 13 performs automatic control processing according to the flowchart shown in FIG. First, the time T corresponding to the period for performing the automatic control is counted (step S102). When the time T elapses, the sunshine determination means 40 described in detail below performs sunshine determination (step S110), and it is determined that there is sunshine. If so, the solar radiation shielding opening for shielding solar radiation is calculated (step S116). As the solar radiation shielding opening, for example, when the electric blind 16 is a horizontal blind, it can be either or both of the degree of rotation angle of the slat and the degree of elevation of the slat. In this case, either or both of the degree of rotation angle of the louver and the degree of movement position of the louver can be used. Further, for example, when the electric blind 16 is a roll clone, the opening degree can be a degree of the height of the screen. The opening degree that shields solar radiation can be calculated based on the solar position information and the information on the orientation of the mounting surface of the electric blind 16 and can be arbitrarily calculated.

  On the other hand, when it is determined that there is no sunshine, the calculated opening is a non-shielding opening with a high opening so that external light can be taken in as much as possible (step S118). For example, in the case where the electric blind 16 is a horizontal blind, the non-shielding opening degree can be set to a degree representing the horizontal rotation angle of the slat or a degree representing the complete rise of the slat. Or it can also be set as the degree showing the rotation angle of the slat parallel to the incident angle of sunlight obtained from the solar altitude information. This is because, when it is cloudy, the angle toward sunlight is the brightest direction.

  Further, in addition to the illuminance value, if it is necessary to perform other time-dependent determination elements such as closing the blind after a certain time, the opening degree based on the determination element has priority (steps S120 to S122). ).

  When the opening degree is calculated, a blind control signal for operating the electric blind 16 is transmitted to the opening degree (step S124). The blind control signal is sent to each blind control device 18, and the operation of each electric blind 16 is performed.

  Every time T, steps S102 to S124 are repeated to perform automatic control following the change in weather.

The sunshine determination by the sunshine determination means 40 is performed according to the flowchart shown in FIG. First, the latest direct illuminance value ΔI from the sunshine detecting device 12 is acquired through the floor control device 14 as described above (step S202). Then, a comparison of these differences and the reference value delta _Th (step S206).

[Equation 2]
ΔI ≦ Δ _Th

If the above inequality is satisfied, it is determined that there is no sunshine (step S208). This is because a low direct illuminance value means that no direct light is present. On the other hand, if the above inequality is not satisfied, it is determined that there is sunshine (step S210). This is because the direct illuminance value is sufficiently large, meaning that there is direct light.

  After the above determination, the process returns to the automatic control process, and the blind opening corresponding to each case is obtained.

  As described above, in this embodiment, the presence / absence of sunshine is determined based on the difference between the whole sky illuminance value and the scattered illuminance value from the sunshine detection device 12 including the illuminance sensors 52 and 53 and the shielding plate 54 that is a shielding member. In addition, a stable determination can be made regardless of the time zone or season. Further, since it is only necessary to relatively rotate the shielding plate 54 around the plurality of illuminance sensors 52 and 53, it can be configured easily and at low cost.

  By arranging a plurality of illuminance sensors 52 and 53 facing different directions, the illuminance sensors 52 and 53 to be used are switched as shown in FIGS. 8 and 9 according to the movement of the sun. It is possible to prevent the relative positional relationship between the shielding plate 54 and the illuminance sensors 52 and 53 when satisfying the position from changing greatly regardless of the position of the sun (the first relative positions in FIGS. 8 and 9). (Note that the relative positional relationship between the illuminance sensor and the shielding plate at the position is substantially the same). That is, it is possible to perform measurement with higher accuracy while avoiding slight fluctuations in the illuminance value due to the directivity of the illuminance sensors 52 and 53.

  The number of illuminance sensors 52 and 53 is two in this embodiment. However, the number of illuminance sensors 52 and 53 is not limited to this, and it is possible to provide three or more illuminance sensors facing different directions in accordance with the sun's orbit. These illuminance sensors can be sequentially switched with the movement of the sun. When an appropriate number and an illuminance sensor with low directivity are used, the correction by multiplying 1 / cos θ in the above equation (1) can be omitted. Further, an expensive device such as a solar light tracking device can be eliminated.

  Moreover, in the above embodiment, the presence or absence of sunshine was determined using the illuminance value from any one of the illuminance sensors 52 and 53. However, the present invention is not limited to this. For example, When the sun is in the vicinity of the predetermined position, the direct illuminance value may be obtained using the illuminance values of both of the plurality of illuminance sensors 52 and 53.

  In the embodiment described above, the direct illuminance value is calculated in the sunshine detection device 12, but the present invention is not limited to this, and the direct illuminance value is calculated in the central control device 13 or other devices. The illuminance sensor to be used may be determined by the sunshine determining means 40 and the central control device 13, or the sunshine determining means 40 itself may be provided in the sunshine detecting device 12. Various modifications are possible within the range.

1 is a schematic configuration diagram including an electric blind control device and an electric blind according to the present invention. It is a detailed block diagram of the control apparatus of the electric blind by this invention. It is a detailed block diagram of the arithmetic unit of the sunshine detection apparatus by this invention. It is a perspective view of the sunshine detection apparatus by this invention. It is a side view of the sunshine detection apparatus by this invention. It is a flowchart of direct illuminance value calculation. It is a flowchart of an automatic control process. It is a flowchart of a sunshine determination process. (a) is a top view showing the relationship between the position of the sun and the illuminance sensor to be used, and (b) is a projection onto a vertical plane perpendicular to the north-south direction. It is explanatory front view showing the relative positional relationship of the shielding board which is a shielding member, and an illumination intensity sensor. It is explanatory front view showing the relative positional relationship of the shielding board which is a shielding member, and another illumination intensity sensor.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Control apparatus 12 Sunlight detection apparatus 13 Central control apparatus 16 Electric blind 38 Automatic control means 40 Sunlight determination means 52 Illuminance sensor 53 Illuminance sensor 54 Shielding plate (shielding member)
A Sky illuminance value B Scattered illuminance value ΔI Direct illuminance value Δ _Th reference value (setting value)

Claims (8)

A plurality of illuminance sensors (52, 53) arranged to face different directions, and a first relative position that shields the incidence of direct light from the direction of the sun on each illuminance sensor (52, 53); Relative motion is performed with respect to each illuminance sensor (52, 53) so as to pass at least the second relative position that does not block the incidence of direct light from the direction in which the sun exists on each illuminance sensor (52, 53). A sunshine detecting device (12) comprising a shielding member (54) to perform ;
Sunshine determination means (40) for determining the presence or absence of sunshine from the relationship between the illuminance value from the illuminance sensor (52, 53) and the relative position between the illuminance sensor (52, 53) and the shielding member (54); With
The illuminance value used to determine the presence or absence of sunshine is an illuminance value from one illuminance sensor selected from a plurality of illuminance sensors (52, 53) according to the position of the sun. Electric blind control device. The shielding member (54) is a member that rotates around the plurality of illuminance sensors (52, 53) at a predetermined cycle, and the shielding member (54) rotates so that the sun and the illuminance sensors (52, 53) 2. The electric blind control device according to claim 1, wherein a position arranged between the first relative positions is set as the first relative position. The control device for an electric blind according to claim 1 or 2, wherein the shielding member (54) moves in a direction parallel to a moving direction of the sun. The automatic control means (38 ) for outputting a control signal for the electric blind (16) based on the result of the sunshine presence / absence determination by the sunshine determination means (40), comprising an automatic control means (38 ) . Electric blind control device. The said sunshine determination means (40) is calculated | required from the illuminance value from the illuminance sensor selected from several illuminance sensors (52,53), and the illuminance sensor (52,53) is the illuminance by the shielding member (54). The difference between the whole sky illuminance value (A) that is not affected and the scattered illuminance value (B) in which the illuminance sensors (52, 53) are shielded from direct light from the sun by the shielding member (54) The control device for an electric blind according to any one of claims 1 to 4 , wherein the presence or absence of sunshine is determined from a direct illuminance value (ΔI). The sunshine determination means (40), electric blind according to claim 5, wherein the comparison result between the feedthrough illuminance value ([Delta] I) with a predetermined setting value (delta _Th) be the sunshine existence determination result Control device. 7. The electric blind control according to claim 6, wherein the automatic control means (38) increases the blind opening when the direct illuminance value (ΔI) is smaller than a set value ( _ΔTh ). apparatus. The said automatic control means (38) controls the opening degree of a blind to the opening degree which shields solar radiation, when the said direct illuminance value ((DELTA) I) is larger than a setting value ((DELTA) _Th ). The control device for an electric blind according to 6 or 7.

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