JP2010053594A - Control device, control method, and control program for electric blind - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a control device, control method, and control program for an electric blind capable of performing a function for controlling the opening/closing angle which is equivalent to those of the conventional types, without using an angle detector coupled directly to a motor shaft. <P>SOLUTION: This control device includes a control angle storage means for storing each of a plurality of control angles, in correspondence with the number of drive cycles, up to an end angle indicating a fully open angle or a fully close angle. The angle of a blade is controlled, based on the stored values of the control angle storage means by managing, through figures, the number of drive cycles from the output of a cycle detection means (S22, S23). When the number of drive cycles reaches the number corresponding to a control angle according to an operating instruction, the control device makes the opening/closing operation (S27, S29) stop. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electric blind control device, a control method, and a control program, and more particularly, to an externally installed electric blind control device, control method, and control method for raising and lowering a blind portion and opening and closing a blade according to the rotation of an induction motor. It relates to the control program.

  In recent intelligent buildings and the like, there is a demand for an electric blind or a control device for an electric blind that operates by connecting and interlocking a plurality of electric blinds so that each blind has the same elevation height and the same opening / closing angle. . In such a control device, a DC motor is mainly used for ease of braking in order to perform fine control. However, the induction has a constant constant speed for large blinds or inexpensive blinds. Various types using electric motors have been proposed to improve specific problems.

  For example, Patent Document 1 discloses an electric blind provided with a transmissive photo interrupter that connects a disk provided with a slit to an electric motor shaft and sandwiches the slit as rotation detection means. This electric blind controls the angle of the blades by counting the pulse signal output from the photo interrupter every time the light from the light emitting element is blocked by the disk due to the rotation of the shaft, and the electromagnetic brake with a loud operating noise Instead, a direct current obtained by rectifying the AC power source can be passed through the induction motor winding to quietly brake.

  In Patent Document 2, after the non-energized state, the induction motor is operated in the opposite direction for the time necessary to cancel the rotational inertia torque in one direction, and the blade is stopped at a desired blade angle. An electric blind is shown.

  Patent Document 3 discloses an electric blind that first drives an induction motor to a specific end angle and then drives it in the opposite end direction when setting an arbitrary management angle. ing. That is, it is described that the reproducibility of the blade angle is ensured by always setting the same opening / closing direction to an arbitrary management angle. Similarly, it is also shown that the management angle can be easily managed by reducing the number of management angles at a height at which the load of the induction motor greatly varies depending on the opening / closing direction.

In order to reliably manage the management angle, these blinds detect the actual rotation amount by directly connecting a member to the motor shaft as shown in Patent Document 1 described above as angle detection means. It is supposed to be.
JP-A-11-190181 JP-A-11-81823 JP-A-11-190182

  In recent years, energy saving has become a major issue due to global environmental problems, so there is an externally installed blind that installs an electric blind outside the building and blocks the solar energy outside the building. Attention has been paid.

  However, since each member is normally designed on the assumption that it is an electric blind installed indoors, it would be a significant cost increase to have a waterproof function for outdoor installation.

  In particular, members (angle detection devices) such as angle detection means that are directly connected to the motor shaft cannot be separated and moved indoors, and therefore must be waterproof.

  Therefore, an object of the present invention is to provide a control device, a control method, and a control method for an electric blind capable of realizing a function for managing an opening / closing angle equivalent to the conventional one without using an angle detection device directly connected to the motor shaft. It is to provide a control program.

  A control device for an electric blind according to an aspect of the present invention is a control device for an electric blind that raises and lowers a blind portion and opens and closes a plurality of blades according to rotation of an induction motor, An operation command means for receiving the operation command from the user, a drive means for driving the induction motor, a cycle detection means for detecting an AC power supply cycle supplied to the drive means, and each of a plurality of management angles A control angle storage means for storing the number of drive cycles up to the end angle representing the fully open angle or the fully closed angle, and an operation command from the operation command means, thereby determining the operation motor from the operation command means. Control means for performing control to drive, the control means from the detection signal of the cycle detection means of the AC power supply cycle By managing the number of drive cycles representing the number, the blade angle is managed based on the value stored in the management angle storage means, and if the operation command is a blade opening / closing command, Control to stop the opening and closing operation at the management angle.

  As a result, the opening / closing amount, that is, the blind angle can be controlled by the number of driving cycles of the AC power source that is not directly connected to the motor shaft.

  Preferably, the storage device further includes an open / close correction storage unit for storing the number of drive cycles of the first operation corresponding to the upward direction of the open / close operation, and the control unit further detects the cycle detection unit during the first operation. The number of drive cycles is counted from the signal and stored in the open / close correction storage means. Each time the stored value of the open / close correction storage means becomes a constant value, additional driving is performed for a predetermined number of cycles.

  As a result, it is possible to align the actual driving amounts according to the opening and closing directions, and the reproducibility of each management angle is ensured.

  Preferably, reference value storage means for storing a drive cycle reference value for providing a difference in the number of drive cycles depending on the opening / closing direction, and for detecting that the blind portion has been lowered to the lower limit position while maintaining the end angle. A lower limit detection means and a lower limit detection angle storage means for storing the number of lower limit drive cycles, and the control means is further configured to change the detection signal from the lower limit detection means when the opening / closing operation is started at the lower limit position. The number of drive cycles that have been count-managed is stored in the lower limit detection angle storage means as the lower limit drive cycle number and, if different from the old stored value of the lower limit detection angle storage means, stored in the reference value storage means. The drive cycle reference value is changed in a direction in which the lower limit drive cycle number does not change.

  As a result, the lower limit detection angle in the opening / closing operation at the lower limit is acquired, and the actual driving amount is different because the difference in the actual driving amount with the difference in the driving amount in the up / down direction, that is, the opening / closing direction is not appropriate. Since the correction amount is adjusted by discriminating from the change in the lower limit detection angle, it is possible to control the actual drive amount so that it does not differ in the opening and closing direction so that the opening and closing range position at the lower limit position does not change. It becomes possible.

  Preferably, in the first operation, the control means further has a first driving cycle number corresponding to a first end angle, which is an end angle in the upward direction, in which the driving cycle number that has been count-managed is the end angle in the upward direction. When it is determined that the difference between the lower limit drive cycle number and the second drive cycle number corresponding to the second end angle that is the end angle in the descending direction exceeds a predetermined value, The first operation is added beyond the first end angle in a direction in which the number becomes the second driving cycle number.

  As a result, even if the lower limit detection angle deviates from the reference and the lower limit opening / closing range position shifts, the lower limit opening / closing range position can be corrected to the reference position without a sense of incongruity.

  Preferably, the control means further indicates that, as the interlocking process based on the detection signal from the lower limit detection means, the lower limit detection means has lowered the lower limit position during the second operation corresponding to the descending direction of the opening / closing operation. When the lower limit detection signal is input, the second operation by the driving unit is stopped.

  As a result, since the opening / closing operation stop of the end angle that becomes the lower limit position is set to the detection position of the lower limit detecting means, the end position is always a constant position, so that one end angle position is always the same angular position, The opening / closing position of is no longer shifted.

  Preferably, the control unit further includes a lower limit detection unit as a linked process based on the lower limit detection signal, even if the number of drive cycles counted and managed during the second operation becomes the second number of drive cycles. Further, the driving is continued until a lower limit detection signal indicating that the position has been lowered to the lower limit position is input.

  As a result, the one end angle that is the descent operation stop is set as the detection position of the lower limit detection means, so that the one end angle position is always the same angle position, and the open / close position at the lower limit is shifted. Disappears.

  Preferably, the apparatus further includes interlock selection means for accepting a selection as to whether or not to execute the interlocking process from the user, and executes the interlocking process only when the user selects to execute the interlocking process.

  Alternatively, when the control means determines that the lower limit drive cycle number has continuously coincided with the old stored value a predetermined number of times, it is preferable that the interlocking process is set to be valid in the subsequent opening / closing operation.

  An electric blind control method according to another aspect of the present invention is an electric blind control method for raising and lowering a blind portion and opening and closing a plurality of blades according to rotation of an induction motor, and each of a plurality of management angles. A management angle storage means for storing the number of drive cycles corresponding to the end angle representing the fully open angle or the fully closed angle is stored in the memory, and an operation command for raising / lowering the blind part or opening / closing the blade is received from the user. And determining the operation command to operate the driving means for driving the induction motor, counting and managing the number of driving cycles representing the number of AC power supply cycles supplied to the driving means, and counting management. Managing the blade angle based on the number of drive cycles and the stored value of the management angle storage means, and the operation If decree was command for opening and closing of the blades, and a step of stopping the opening and closing operation by managing an angle corresponding to the operation command.

  A control program for an electric blind according to still another aspect of the present invention is a control program for an electric blind that raises and lowers a blind portion and opens and closes a plurality of blades according to rotation of an induction motor, and each of a plurality of management angles. , A step of preparing in the memory management angle storage means for storing the number of drive cycles up to the end angle representing the fully open angle or the fully closed angle in correspondence with each other, and an operation command for raising / lowering the blind part or opening / closing the blades from the user If accepted, the step of operating the drive means for driving the induction motor by determining the operation command, the step of counting and managing the number of drive cycles representing the number of AC power supply cycles supplied to the drive means, The blade angle is managed based on the managed number of drive cycles and the stored value of the managed angle storage means. A step, when the operation command is a command for opening and closing of the blades, and a step of stopping the opening and closing operation by managing an angle corresponding to the operation command to the computer.

  According to the present invention, a function for managing an opening / closing angle equivalent to the conventional one can be realized without using an angle detection device directly connected to the motor shaft. As a result, even if it is an externally installed blind, it is not necessary to consider the waterproofness of the angle detection device, so that an inexpensive electric blind can be achieved.

  Embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

<About configuration>
FIG. 1 is a block diagram showing a schematic configuration of an electric blind according to an embodiment of the present invention.

  Referring to FIG. 1, the electric blind according to the present embodiment converts an AC voltage output from power input unit 1, power transformer 2, and power transformer 2 to which a 100 V AC power is input into a predetermined DC voltage. Stabilized power supply unit 3 for controlling the electric blind, MPU (Micro Processing Unit) 4 for controlling the electric blind, zero cross detecting unit 5 for detecting the zero cross point of the voltage of the AC power source, electric motor for driving the induction motor 7 The drive unit 6, the electromagnetic brake 8, the speed reduction mechanism 71 for reducing the rotation of the induction motor 7, the opening / closing drum 13 connected to the speed reduction mechanism 71 by the shaft 102 (see FIG. 2), the plurality of blades 14, and the opening / closing drum 13 Ladder cord 15 for opening and closing blades 14 by rotation, blind portion 20 including a plurality of blades 14, provided at the lower end of blind portion 20 Tom rail 16, lifting tape 17 for raising and lowering blind part 20, upper limit switch 18 for detecting that blind part 20 has been raised to the upper limit, conversely lower limit switch 19 for detecting that the lower part has been lowered to the lower limit, user An operation unit 300 for receiving an instruction from is included. The operation unit 300 includes an elevation command unit 9, an opening / closing command unit 10, and a fully closed interlocking switch 11 described later. The raising / lowering command unit 9 includes a plurality of operation switches for receiving an operation command related to the raising / lowering of the blind unit 20 from the user, that is, an up switch 91, a down switch 92, and a stop switch 93. The opening / closing command unit 10 includes a plurality of operation switches, that is, angle setting switches 1001 to 1029 for receiving operation commands related to opening / closing of the blades 14 from the user.

  In the electric blind device shown in FIG. 1, components other than the blind portion 20 (the plurality of blades 14 and the bottom rail 16) and the ladder cord 15 constitute an “electric blind control device”.

  FIG. 2 is a conceptual diagram illustrating an appearance and a configuration example of the electric blind according to the embodiment of the present invention.

  Referring to FIG. 2, blind portion 20 and head box 100 are arranged outdoors, that is, outside a window, and power supply input portion 1, controller 220, and control box 200 connected to power supply input portion 1 and controller 220 are provided. Located indoors. The controller 220 includes the above-described elevation command unit 9 and opening / closing command unit 10.

  The head box 100 includes an induction motor 7, an electromagnetic brake 8, an opening / closing drum 13, an upper limit switch 18, a lower limit switch 19, a speed reduction mechanism 71, a shaft 102, and a lifting drum 104.

  The control box 200 includes a power transformer 2, a stabilized power supply unit 3, a zero cross detection unit 5, and an electric motor drive unit 6 that are high-power systems 202, and an MPU 4 and a fully-closed interlocking switch 11 that are light-power systems 204. . The fully-closed interlocking switch 11 receives a selection from the user (such as an administrator) whether or not to execute the fully-closed interlocking process, that is, the correction of the deviation of the opening / closing range height by the lower limit switch 19.

  The MPU 4 is connected to the upper limit switch 18 and the lower limit switch 19 through the communication line 112. In addition, the electric motor drive unit 6 is connected to the induction motor 7 and the electromagnetic brake 8 by a power supply line 114.

  The 100 V AC power input to the power input unit 1 is stepped down by the power transformer 2 and supplied to the stabilized power unit 3. The stabilized power supply unit 3 generates and outputs a DC voltage to be supplied to the MPU 4 and the like. Further, the zero cross detection unit 5 detects that the AC voltage input to the power input unit 1 becomes 0 V, and outputs it to the MPU 4 as a pulse waveform.

  The AC voltage of 100 V input to the power input unit 1 is also supplied to the motor drive unit 6. The electric motor drive unit 6 rectifies the supplied alternating current and selectively outputs the rectified current and the alternating current to the induction motor 7. The electric motor drive unit 6 controls the output of the alternating current and the rectified current based on the control signal output from the MPU 4 and controls the forward rotation, reverse rotation, and stop of the induction motor 7. The electric motor drive unit 6 also controls the supply of alternating current to the electromagnetic brake 8. A specific configuration example of the electric motor drive unit 6 will be described later.

  The rotation of the induction motor 7 is decelerated by the deceleration mechanism 71, and the decelerated rotation is transmitted to the open / close drum 13 by the shaft 102. The opening / closing drum 13 opens and closes the blades 14 via the ladder cord 15 by the rotation of the shaft 102. One of the ladder cords 15 is wound around and fixed to the open / close drum 13, and the other is provided so as to sandwich the plurality of blades 14 at a constant interval, and the lower end thereof is fixed to the bottom rail 16.

  The induction motor 7 has a rotational speed that is substantially proportional to the AC power supply frequency, but the rotational speed decreases as the load increases. As described above, at the time of the ascending operation and the opening operation, the bottom rail 16 and the blades 14 stacked on the bottom rail 16 become a load and wind up the lifting tape 17. However, since it is rewound during the reverse descending operation and closing operation, the bottom rail 16 and the blades 14 stacked on the bottom rail 16 work to reduce the load. That is, the load is larger in the ascending operation and the opening operation than in the descending operation and the closing operation, and the rotation speed of the induction motor 7 is also slowed.

  One end of a lifting tape 17 for raising and lowering the blind portion 20 is fixed to the bottom rail 16. The other end of the lifting tape 17 passes through a through hole formed in the plurality of blades 14 and is fixed to the elevating drum 104. The elevating drum 104 and the opening / closing drum 13 are connected by a clutch mechanism (not shown), and the blades 14 are raised through the opening direction or lowered through the closing direction. That is, when the lifting tape 17 is wound around the elevating drum 104, the blades 14 are opened at full open angles (actually, they are fully closed like the ends in the reverse direction. When the lifting tape 17 is rewound from the lifting drum 104, the blades 14 are lowered after the closing angle reaches the fully closed angle.

  Each of the upper limit switch 18 and the lower limit switch 19 has a built-in micro switch. When the blind portion 20 rises to the upper limit, the blades 14 stacked on the bottom rail 16 push up the protrusion 18A attached so as to protrude from the head box 100, whereby each contact point of the micro switch of the upper limit switch 18 Is configured to turn on. In addition, when the blind portion 20 is lowered to the lower limit, each contact of the micro switch of the lower limit switch 19 is turned on by a cam (not shown) that decelerates the rotation speed of the shaft 102. .

  The lower limit switch 19 includes a speed reducing mechanism 71 using a cam to reduce the rotational speed of the shaft 102 and turn on / off the micro switch. However, when changing the lower limit, that is, the lowering height, the administrator The screw bolt of the cam for turning on / off the micro switch in the speed reduction mechanism 71 can be adjusted.

  Moreover, the structure of the upper limit switch 18 and the lower limit switch 19 is not limited to the above, and each should just detect that the blind part 20 reached the upper limit position and the lower limit position.

FIG. 3 is a block diagram showing a schematic configuration of the electric motor drive unit 6.
Referring to FIG. 3, motor drive unit 6 has a gate control circuit unit for controlling the output of alternating current and rectified current to induction motor 7 and the output of alternating current to electromagnetic brake 8 under the control of MPU 4. 26, triacs 21 to 24, which are bidirectional semiconductor switches, and a diode 25.

  When the induction motor 7 is rotated forward and in an ascending operation and an opening operation, the gate control circuit unit 26 turns on the triac 21 according to an instruction from the MPU 4. As a result, an AC voltage of 100 V is applied between CW (ClockWise) and COM (COMmon) of the induction motor 7, and the induction motor 7 rotates forward.

  Further, when the induction motor 7 is reversely rotated to be the lowering operation and the closing operation, the gate control circuit unit 26 turns on the triac 22 according to an instruction from the MPU 4. As a result, an AC voltage of 100 V is applied between the CCW (Counter ClockWise) of the induction motor 7 and the COM, and the induction motor 7 is reversed.

  Further, when the induction motor 7 is subjected to DC braking, the gate control circuit unit 26 turns on the triac 24. As a result, the current half-wave rectified by the diode 25 flows from CW of the induction motor 7 to COM, and the induction motor 7 is braked.

  When the induction motor 7 is rotated forward or reverse, the gate control circuit unit 26 turns on the triac 23. As a result, an AC voltage of 100 V is applied to the electromagnetic brake 8 and the braking of the electromagnetic brake 8 is released. A capacitor 72 provided between CW and CCW of the induction motor 7 is a phase advance capacitor.

  FIG. 4 is a block diagram showing a configuration example of the MPU 4 of the electric blind according to the embodiment of the present invention.

  Referring to FIG. 4, MPU 4 includes a calculation unit 40 for controlling each unit and performing various calculation processes, and a RAM (Random Access) for storing work data used for opening / closing control and opening / closing management of the electric blind. Memory) 49. In the RAM 49, a management angle table 41, an opening / closing management counter 42, an opening / closing correction counter 43, correction reference data 44, a lower limit detection angle data 45, a lower limit opening / closing range flag 46, and an opening / closing stop angle data 47 are defined and arranged. Has been. Although not shown here, work data used for raising / lowering control and height management of the blind portion 20 is also arranged in the RAM 49.

  The calculation unit 40 of the MPU 4 counts the pulse waveform signal input from the zero cross detection unit 5 while the induction motor 7 is controlled to rotate forward and reverse, and manages the height position of the blind unit 20 and the blade angle. More specifically, by determining an operation command from the controller 220, the electric motor drive unit 6 controls the induction motor 7 to be driven (forward or reverse). Further, the angle of the blade 14 is based on the stored value of the management angle table 41 by counting and managing the number of drive cycles (hereinafter referred to as “half cycle number”) representing the number of AC power supply cycles from the detection signal of the zero cross detection unit 5. When the operation command is a blade opening / closing command, control is performed to stop the opening / closing operation at a management angle corresponding to the operation command.

  The starting point of the height data is when the upper limit switch 18 is turned on. The arithmetic unit 40 stops the ascending operation when the upper limit switch 18 is turned on, clears the count, and sets the height data to “0”. Then, the number of pulses of the pulse waveform signal input from the zero cross detector 5 is added during the descending operation, and the height data is counted and managed by subtracting it during the reverse ascending operation. If the lower limit switch 19 is turned on when the blind portion 20 is lowered to the lower limit, the lowering operation is stopped. That is, the blind portion 20 can be moved up and down within a range in which the upper limit switch 18 and the lower limit switch 19 are turned on, and the height data value when the lower limit switch 19 is turned on becomes the maximum value.

  As described above, the starting point of the angle data is the fully open angle that is the angle data when the ascending operation is stopped because the ascending operation is ascending at the fully open angle and the descending operation is descending at the fully closed angle. The angle data when the descending operation is stopped is the fully closed angle.

  As described above, the angle setting switches 1001 to 1029 of the opening / closing command unit 10 are switches for setting the angle of the blade 14. As for the angle of the blade 14, the fully open angle that is the end in the forward direction of the induction motor 7 is “1”, the angle at which the blade 14 is horizontal is “15”, and the fully closed angle that is the end in the reverse direction is “29”. In other words, in the present embodiment, the range from the fully open angle to the fully closed angle is divided into 29, and each management angle corresponds to the angle setting switches 1001 to 1029. For example, when the angle setting switch 1008 is pressed, the arithmetic unit 40 causes the induction motor 7 to rotate forward or reverse from the management angle at the time of the command so that the management angle becomes “8”. Control is performed so that the management angle becomes “8”.

Hereinafter, the work data in the RAM 49 will be described in detail.
The management angle table 41 stores, for each of the plurality of management angles, the number of half cycles up to the end angle representing the fully open angle or the fully closed angle in association with each other. In the present embodiment, for example, the number of half cycles for each management angle with the fully open angle as a reference (“0”) is stored.

  FIG. 5 is a diagram illustrating a data structure example of the management angle table 41. The management angle table 41 shows the relationship of the drive amount of the induction motor 7 between the 29 management angles, that is, the number of drive half cycles from the management angle “1 (full open angle)” to each management angle. The number of drive half cycles is managed by the open / close management counter 42.

  The open / close management counter 42 stores the number of drive half cycles counted based on the output from the zero-cross detector 5 during the up / down operation and the open / close operation. That is, as described above, the angle is fully open (management angle “1”) during the ascent, and the opening / closing management counter 42 is set to “0”. The arithmetic unit 40 increments by 1 ("+1") every time half-cycle driving is performed during the closing operation. In the reverse opening operation, the value is decremented by 1 ("-1") every time half cycle driving is performed. In that sense, the data table shown in FIG. 5 is also a diagram showing the relationship between the 29 management angles and the opening / closing management counter 42.

  Since the fully closed angle (management angle “29”) is set during the lowering as described above, “132” is set in the open / close management counter 42 during the lowering. In addition, the calculation unit 40 controls the induction motor 7 so that the value of the opening / closing management counter 42 does not stop except for the table value shown in FIG. Thereby, the angle of the blade | wing 14 is managed only to 29 management angles.

  The open / close correction counter 43 stores the number of drive cycles of the open / close operation in a specific direction. The “specific direction” is one of the upward and downward directions, and in the present embodiment, it is assumed to be upward. That is, the open / close correction counter 43 stores the number of drive half cycles during the opening operation.

  The correction reference data 44 stores a drive half cycle reference value for providing a difference in the number of drive cycles during the opening operation.

  At the time of the opening operation, the arithmetic unit 40 sets the opening / closing management counter 42 to “−1” and simultaneously sets the opening / closing correction counter 43 to “+1”. Then, every time the half cycle value (drive cycle reference value) stored in the correction reference data 44 is reached, only the half cycle number is driven to perform the opening operation. When additional driving is executed during the opening operation, the open / close correction counter 43 is reset (“0”). As described above, when the opening operation is performed, every time the counter value of the opening / closing correction counter 43 becomes the set value of the correction reference data 44, the opening operation is performed by additional driving for half a cycle.

  The additional half-cycle opening operation by the above-described opening / closing correction counter 43 is performed to correct a difference in actual driving amount due to a difference in electric motor load depending on the opening / closing direction, that is, the lifting / lowering direction. That is, as described above, since the motor load is larger during the ascending operation than during the descending operation, the actual driving amount is smaller during the ascending operation even with the same number of driving half cycles. In order to obtain the same drive amount as that of the descending operation, that is, the closing operation, even during the ascending operation, that is, the opening operation, the additional half-cycle number opening operation is performed for every certain opening operation.

  Note that the difference in the actual driving amount in the raising / lowering direction, that is, the opening / closing direction differs depending on the size of the blind portion 20, and generally the difference increases as the blind portion 20 becomes larger. That is, regardless of the size of the blind portion 20, if the value of the reference data for correction 44 is the same value, if only the opening / closing operation is repeated, the amount of additional opening operation at the time of opening operation (ie additional Ascending operation amount) is insufficient, and the height of the opening / closing operation is lowered, that is, the opening / closing range is lowered. On the contrary, in the case of the small blind part 20, the additional opening operation (that is, the additional raising operation amount) at the time of the opening operation is excessively large, and the opening / closing range is increased. For these reasons, it is necessary to set the correction amount corresponding to the size of the blind portion 20, that is, the set value (drive cycle reference value) of the correction reference data 44. In the present embodiment, an appropriate reference value can be set as the opening / closing operation is repeated.

  The blind portion 20 is normally opened and closed at a height lowered to the lower limit height. However, in the opening and closing operation at the lower limit, the lower limit switch 19 is turned on when the lower limit is stopped in the lowering operation, and management is performed. The angle is “29 (fully closed angle)”. Here, if an opening operation is performed, the blind portion 20 performs an opening operation with an ascending operation, and the lower limit switch 19 is switched from on to off. Here, when only the opening / closing operation is repeated, if the opening / closing range increases, the lower limit switch 19 will not be turned on even if the control angle becomes “29 (fully closed angle)” in the closing operation, and the opening / closing is reversed. If the range is lowered, the lower limit switch 19 is turned on before the control angle “29 (fully closed angle)” is reached. That is, it changes so as to be turned on with a small management angle value. Similarly, in the case of the opening operation, it is turned off with a small management angle value. This means that the change in the count value itself of the opening / closing management counter 42 before conversion into the management angle can be grasped more finely.

  In the present embodiment, the count value of the open / close management counter 42 when the lower limit switch 19 is turned off is stored in the lower limit detection angle data 45. The lower limit detection angle data 45 is a management angle value (information for specifying the current angle of the blade 14) when the detection signal from the lower limit switch 19 during the opening / closing operation at the lower limit changes from on to off. The number of half cycles stored in the management counter 42 is stored. By comparing the value of the lower limit detection angle data 45 with the fully closed angle data, that is, the half cycle number (132) corresponding to the fully closed angle, it is determined whether or not the opening / closing range is deviated (up or down). The

  Specifically, the calculation unit 40 overwrites and saves the count value of the open / close management counter 42 when the lower limit switch 19 is turned off from the ON state during the subsequent opening operation at the lower limit in the lower limit detection angle data 45. At the same time, if the stored value is different from the old stored value (that is, if a change occurs in the height of the opening / closing range), the set value of the reference data for correction 44 is set in a direction in which the value of the lower limit detection angle data 45 does not change. change. That is, the calculation unit 40 decreases the set value of the correction reference data 44 when the stored value of the lower limit detection angle data 45 becomes smaller than the old stored value (that is, when the opening / closing range decreases). Then, when such processing is repeated and overcorrection occurs and the opening / closing range starts to increase (that is, conversely, when the lower limit detection angle data 45 is stored larger than the old stored value), the correction reference data The data value of 44 is increased.

  Thus, in the present embodiment, it is determined whether the height of the opening / closing range has changed (whether it is rising or falling), and correction is made when the height of the opening / closing range has increased. The over-correction is prevented by increasing the data value of the reference data 44 for use and reducing the half-cycle additional opening operation. On the contrary, when the height of the opening / closing range is lowered, the correction reference data 44 is made smaller so that correction is not insufficient by increasing the number of half-cycle additional opening operations.

  Further, as will be described in detail later, when the value of the lower limit detection angle data 45 is greatly deviated from the fully closed angle data, that is, when the open / close range is greatly lowered, the opening to the “fully open angle” is performed. During operation, an opening operation is further added to raise the height of the opened / closed range that has been lowered and restore the height of the opened / closed range.

  The lower limit opening / closing range flag 46 indicates whether or not the blind portion 20 is in the lower limit opening / closing range, that is, the operation after the blind portion 20 is lowered to the lower limit is only an ascending operation and an opening / closing operation that do not exceed the height of the full opening angle. Is set by the lower limit signal (ON) of the lower limit switch 19 during the lowering operation, and is reset (0) when the full opening angle is exceeded during the ascent operation.

  The opening / closing stop angle data 47 stores the management angle value at which the opening / closing operation is to be stopped, that is, the number of driving half cycles corresponding to the management angle at which the opening / closing operation is to be stopped. If the opening / closing operation is not being performed, “255” is stored, and when any of the operation management angles “1” to “29” is pressed, the corresponding table value (the number of driving half cycles) of the management angle table 41 is set. Remembered. By comparing the value of the opening / closing stop angle data 47 with the value of the opening / closing management counter 42, it is determined whether or not the angle of the blind portion 20 has become the angle desired by the user.

  In the present embodiment, paying attention to the timing at which the lower limit switch 19 is turned on, the “fully closed angle” that is the management angle when the descending operation stops at the lower limit position, the following processing is performed. That is, when the lower limit switch 19 is turned on during the closing operation in the lower limit opening / closing range (the lower limit opening / closing range flag 46 is “1”), the closing operation is stopped as the “fully closed angle” and the opening / closing management counter 42 is set to “ The updated value is set to “132” of the “fully closed angle” table value. Alternatively, even if the count value of the open / close management counter 42 becomes “132” of the “fully closed angle” table value in the closing operation, the count value of the counter 42 remains “131” if the lower limit switch 19 is off. The closing operation is continued until turned on at.

  Such a fully-closed interlocking process can also be performed by turning on the above-described fully-closed interlocking switch 11. By doing so, in the case of the lower limit opening / closing range, the height at the “fully closed angle” is managed to be the height at which the lower limit switch 19 is turned on, so that the height of the opening / closing range does not change.

  The management angle table 41 and the correction reference data 44 are stored, for example, in an EEPROM (Electrically Erasable Programmable ROM), and the data is copied to the RAM 49 in an initialization routine at power-on.

<About operation>
Below, the raising / lowering operation | movement and opening / closing operation | movement of the electric blind in this Embodiment are demonstrated.

1. Elevating Operation The elevating operation, that is, the ascending operation and the descending operation of the electric blind according to the present embodiment will be described with reference to FIGS.

(Climbing action)
It is assumed that the operator presses the lift switch 91 of the controller 220 and gives an instruction to lift the blind unit 20. In this case, the calculation unit 40 of the MPU 4 outputs a release ON signal for releasing the braking of the electromagnetic brake 8 to the electric motor drive unit 6 in synchronization with the zero cross signal from the zero cross detection unit 5. When the release ON signal is input, the motor drive unit 6 turns on the triac 23 and applies an AC voltage to the electromagnetic brake 8. At this time, braking of the electromagnetic brake 8 is released, and the rotor of the induction motor 7 can rotate. Further, the calculation unit 40 of the MPU 4 outputs a normal rotation signal for causing the induction motor 7 to perform normal rotation to the gate control circuit unit 26. When a normal rotation signal is input from the MPU 4, the gate control circuit unit 26 turns on the triac 21 and applies an AC voltage to the induction motor 7. Since the braking of the electromagnetic brake 8 is released, the induction motor 7 starts normal rotation. In general, since the induction motor 7 rotates at high speed, the speed reduction mechanism 71 decelerates the induction motor 7 to a predetermined lifting speed.

  The rotation of the induction motor 7 rotates the elevating drum 104 via the speed reduction mechanism 71 and the shaft 102, and further rotates the open / close drum 13 via the clutch. The lifting tape 17 is wound up by the rotation of the elevating drum 104, and the blades 14b placed on the bottom rail 16 are raised. Further, as the opening / closing drum 13 rotates, the blades 14a suspended by the ladder cord 15 rotate simultaneously. At this time, the bottom rail 16 and the blades 14b mounted on the bottom rail 16 are not rotated and are maintained as they are. It should be noted that when the fully open angle that is the end of the blade 14 in the forward rotation direction is reached, the clutch is automatically disengaged and the rotation of the open / close drum 13 is stopped. Therefore, the angle of the blade 14 during the ascending operation of the blind portion 20 is the fully open angle, that is, the management angle “1”.

  Note that the calculation unit 40 of the MPU 4 counts and manages the height data by subtracting the number of pulse waveform signals input from the zero-cross detection unit 5, that is, the number of half cycles, from the height data while outputting the normal rotation signal.

  It should be noted that the number of driving half cycles is counted during the ascending operation even with a correction counter (not shown) equivalent to the open / close correction counter 43 in the above-described opening operation. Each time the set value of the correction reference data 44 is reached, an additional ascending operation is performed for the number of half cycles (the above-described height data is not subtracted), and a correcting counter (not shown) for the ascending operation is provided. Clear “0”.

  In addition, since the opening operation is performed until the full opening angle is reached immediately after the start of the ascending operation, the open / close management counter 42 is set at every half cycle number during the ascending operation as in the opening operation, as will be described in detail later. “−1” and the opening / closing correction counter 43 are incremented by “+1”. Each time the value of the open / close correction counter 43 becomes the set value of the correction reference data 44, an additional open operation is performed for the number of half cycles (the "-1" process of the open / close management counter 42 is not performed), and the open / close operation is performed. The correction counter 43 is cleared to “0”.

  If the value of the open / close management counter 42 is “0”, no further “−1” count processing is performed. The opening / closing correction counter 43 is also not subjected to “+1” processing. When the opening / closing management counter 42 is “0” and the ascending operation continues, the opening / closing correction counter 43 is cleared to “0” and the lower limit opening / closing range flag 46 is reset (0) to detect the lower limit. An invalid value (“255”) is set in the angle data 45. As a result, the opening / closing correction counter 43 starts counting from “0” at the start of the opening operation in the opening / closing range during the ascending stop. Although details will be described later, since the lower limit detection angle data 45 is “255”, the opening / closing operation management is not performed as the lower limit opening / closing range.

(Descent action)
It is assumed that the operator presses the lowering switch 92 of the controller 220 and gives an instruction to lower the blind unit 20. In that case, the calculation unit 40 of the MPU 4 outputs a release ON signal of the electromagnetic brake 8 to the electric motor drive unit 6. The gate control circuit unit 26 turns on the triac 23 to release the braking of the electromagnetic brake 8, and simultaneously turns on the triac 22 to start reversing the induction motor 7. As the elevating drum 104 rotates, the bottom rail 16 and the blades 14b mounted on the bottom rail 16 begin to descend. Further, the blade 14a suspended by the ladder cord 15 is also rotated by the rotation of the opening / closing drum 13, but the clutch is disengaged when the fully closed angle that is the end angle in the rotation direction of the blade 14 is released, and the angle of the blade 14 is increased. The lowering operation of the blind portion 20 is continued with the fully closed angle, that is, the management angle “29” as described later.

  The calculating unit 40 of the MPU 4 counts and manages the height data by adding the number of pulse waveform signals input from the zero-cross detecting unit 5, that is, the number of half cycles, to the height data while outputting the inverted signal.

  Since the closing operation is performed until the fully closed angle is reached immediately after the start of the descending operation, the opening / closing management counter 42 is set to “ +1 ”.

  If the opening / closing management counter 42 is incremented by “+1” to “132”, that is, the management angle is “29”, no further “+1” counting processing is performed. When the opening / closing management counter 42 is “132” and the descent operation continues, the opening / closing correction counter 43 is also cleared to “0”. As a result, the opening / closing correction counter 43 starts counting from “0” at the start of the opening operation in the opening / closing range during the descent stop.

(Stop of lifting operation)
When the execution of the lifting / lowering operation by the stop switch 93 is finished, the calculation unit 40 of the MPU 4 instructs the motor driving unit 6 to brake the induction motor 7. When there is an instruction to brake the induction motor 7, the gate control circuit unit 26 turns off the triacs 21, 22, and 23, stops applying the AC voltage to the induction motor 7, and sets the induction motor 7 by the electromagnetic brake 8. Start braking. Further, the calculation unit 40 of the MPU 4 turns on the triac 24 via the gate control circuit unit 26 and applies the DC current obtained by rectifying the AC voltage to the induction motor 7 to perform braking. At this time, the rotor of the induction motor 7 is braked, and the rotation of the induction motor 7 is stopped. Note that the triac 24 is also turned off after a set time (for example, one second). When the rotation of the induction motor 7 is stopped, the angle of the blade 14 is the fully open angle, that is, the management angle “1” when the operation is an upward operation, that is, the open / close management counter 42 “0”. Is the fully closed angle, that is, the management angle “29”, and the open / close management counter 42 “132”. The open / close correction counter 43 is “0”.

  If there is no stop operation to the lifting / lowering operation by the stop switch 93, that is, if the lifting operation is continued, the blade 14a suspended by the ladder cord 15 is stacked on the blade 14b mounted on the bottom rail 16. The stacked blades 14 push up the protrusion 18A of the upper limit switch 18 protruding from the head box 100 to turn on the micro switch of the upper limit switch 18.

  In that case, the calculation unit 40 of the MPU 4 instructs the motor drive unit 6 to brake the induction motor 7 with the upper limit signal of the upper limit switch 18 in the same manner as in the stop operation by the stop switch 93 described above, and the management angle “ It will stop at 1 ". The calculation unit 40 sets the height data “0”. The angle data is the management angle “1”, and the open / close management counter 42 as information for specifying the management angle of the blade 14 is “0”.

  When the reverse descending operation is continued, the micro switch built in the lower limit switch 19 is turned on by the cam whose speed of rotation of the shaft 102 is reduced by the speed reduction mechanism 71 at the lower limit position. In this case as well, the calculation unit 40 sets (1) the lower limit opening / closing range flag 46 by the lower limit signal of the lower limit switch 19, and instructs the motor drive unit 6 to brake the induction motor 7, It stops at the management angle “29”. As described above, the angle data is the management angle “29”, and the open / close management counter 42 is “132”.

In either case, the open / close correction counter 43 is “0”.
2. Opening / Closing Operation The opening / closing operation of the electric blind according to the present embodiment will be described with reference to FIGS. 1 to 5 and the flowcharts of FIGS.

  FIG. 6 is a flowchart showing the opening / closing operation management routine in the embodiment of the present invention, and FIG. 7 is a flowchart showing the opening / closing operation management routine in the embodiment of the present invention. FIG. 8 is a flowchart showing the reference data optimization process in FIG. 6 to 8 are stored in advance in a built-in ROM (not shown) of the MPU 4 as a program, for example, and the arithmetic unit 40 of the MPU 4 reads out and executes this program. Further, the routines of FIGS. 6 and 7 are each executed at regular intervals.

(Opening / closing operation management routine)
Referring to FIG. 6, calculation unit 40 of MPU 4 determines whether or not blind unit 20 is operating (step S <b> 1 (hereinafter, “step” is omitted)). Specifically, it is determined whether or not the data value “255” indicating that the opening / closing operation is not being performed is set in the opening / closing stop angle data 47.

  If it is determined that the elevator is moving up or down (YES in S1), the next processing routine is executed. On the other hand, if it is determined that the lift operation or the opening / closing operation is not being performed, that is, the vehicle is stopped (NO in S1), it is determined whether or not the user performs an opening / closing operation (S2).

  If it is determined that the opening / closing operation has been performed, that is, if any of angle setting switches 1001 to 1029 of opening / closing command unit 10 included in controller 220 is pressed (YES in S2), the process proceeds to S3. If it is determined that the opening / closing operation has not been performed (NO in S2), the next processing routine is executed.

  As described above, in this embodiment, in order to simplify the description of the opening / closing operation, the opening / closing operation during the operation is invalidated and valid only during the stop, but this need not be the case.

  In S3, the calculation unit 40 determines the opening / closing direction from the relationship between the operation angle of the opening / closing operation and the current stop angle. That is, in the management angle table 41, the management angle corresponding to the current value of the open / close management counter 42 is compared with the management angle indicated by the pressed angle setting switch. For example, if the value of the opening / closing management counter 42 is “132”, if the angle setting switch 1029 is pressed, it is determined that “operation angle = current stop angle”, and the next processing routine is executed. That is, the operation set of S4 or S5 is not performed, and the management angle “29” is maintained.

  On the other hand, if it is determined in S3 that “operation angle <current stop angle”, the forward rotation operation is set in S4. Specifically, the calculation unit 40 outputs a release ON signal of the electromagnetic brake 8 to the electric motor drive unit 6 as in the above-described ascending operation. Thereby, the gate control circuit unit 26 turns on the triac 23 to release the braking of the electromagnetic brake 8. At the same time, a normal rotation signal for normal rotation of the induction motor 7 is output to the gate control circuit unit 26, and the gate control circuit unit 26 turns on the triac 21 to start normal rotation of the induction motor 7.

  If it is determined in S3 that “operation angle> current stop angle”, the reversing operation is set in S5. Specifically, a release ON signal of the electromagnetic brake 8 is output to the electric motor drive unit 6 as in the above-described lowering operation. Then, the gate control circuit unit 26 turns on the triac 23 to release the braking of the electromagnetic brake 8. At the same time, an inversion signal for inverting the induction motor 7 is output to the gate control circuit unit 26, and the gate control circuit unit 26 turns on the triac 22 to start the inversion of the induction motor 7.

  When the processing of S4 or S5 is completed, the calculation unit 40 sets the corresponding table value (number of drive half cycles) of the management angle table 41 of the operation management angle in the opening / closing stop angle data 47 (S6). For example, “0” is set when the operation management angle is “1”, and “105” is set when the operation management angle is “24”. That is, the value of “255” that is not in the open / close operation is updated to the corresponding table values “0”, “7”, “12”,.

When the process of S6 ends, the next processing routine is executed.
(Opening / closing operation management routine)
Referring to FIG. 7, at the beginning S <b> 11 of the opening / closing operation management routine, whether or not the opening / closing operation is being performed is always performed from the set value of opening / closing stop angle data 47. In the present embodiment, when the power is turned on (the flow diagram is omitted) and when the opening / closing operation is stopped (described later), a data value “255” indicating that the opening / closing operation is not being performed is set in the opening / closing stop angle data 47. Yes. Accordingly, whether or not the value of the opening / closing stop angle data 47 is “255” is determined in S11.

  If “open / close stop angle data = 255”, it is determined that the open / close operation is not being performed, and the next processing routine is performed. However, when the forward rotation operation or the reverse operation is set in S4 or S5, the “open / close stop angle” is set. Since “data ≠ 255”, it is determined that the opening / closing operation is in progress. In S12, the zero cross signal input output from the zero cross detector 5 is determined. That is, “input” is determined every half cycle of the AC power supply, and whether or not forward rotation is being performed, that is, the opening / closing direction is determined in the next S13. When forward rotation is determined, that is, when it is determined to be in the open direction (YES in S13), the process proceeds to S14. When reverse rotation is determined, that is, when the closed direction is determined (NO in S13), the process proceeds to S17.

  Hereinafter, specific examples of the forward rotation operation and the reverse operation in the present embodiment will be described. For simplicity of explanation, items are described separately for each assumed situation.

a) Forward rotation operation (opening operation) from the lower limit position When stopping at the lower limit position, as described above, when the lowering switch 92 of the controller 220 is pressed, the blind portion 20 is moved to the lower limit switch at the lower limit position. While 19 is turned on and stopped, the control values are as follows. That is, the lower limit opening / closing range flag 46 is set (1), the opening / closing management counter 42 is “132” indicating a fully closed angle, the opening / closing correction counter 43 is “0”, and the lower limit detection angle data 45 is “255” indicating an invalid value. Therefore, when the blind portion 20 is lowered to the lower limit position and stopped, the opening / closing stop angle data 47 is “255”.

  In this case, since the current management angle is “29”, it is assumed that one of the angle setting switches 1001 to 1028 is pressed in the opening / closing operation management routine of FIG. In this case, since the current management angle is “29” with respect to the operation management angles “1” to “28”, “operation angle <current stop angle” is determined in S3 described above, and forward rotation is performed in S4. Is set.

  In S14 of FIG. 7, the calculation unit 40 executes a reference data optimization process, that is, a process for making the correction reference data 44 an appropriate value.

  In the reference data optimization process shown in FIG. 8, since the lower limit opening / closing range flag 46 is set (1) in S141, the lower limit opening / closing range is determined (YES in S141). Since the lower limit switch 19 is not yet turned off immediately after the opening operation is started, it is determined in S142 that there is no change in the lower limit switch (NO in S142). Thereafter, when a certain opening operation is performed, lower limit switch 19 is turned off, and it is determined that the lower limit switch has changed (YES in S142).

  In the next S143, since it is the first opening operation after the descent operation is stopped, the lower limit detection angle data 45 is determined to be “255”, that is, the lower limit detection angle data is “invalid value (255)”. Therefore, the process proceeds to S 147, and the value of the opening / closing management counter 42, that is, the effective value (“0” to “131”) when the lower limit switch 19 is turned off is set in the lower limit detection angle data 45. When this process ends, the process returns to the opening / closing operation management routine.

  In addition, although the optimization process of the reference data for correction 44 is not performed this time, it is performed from the next time when an effective value is set in the lower limit detection angle data 45.

  Referring to FIG. 7 again, when the processing of S14 is completed, operation unit 40 increments the count value of open / close correction counter 43 in S15, and determines whether or not the additional opening operation is appropriate in next S16. . That is, it is determined whether the count value of the open / close correction counter 43 has been “+1” to the set value of the correction reference data 44. Immediately after the first opening operation, since “open / close correction counter value <correction reference data value”, the open / close management counter 42 is “−1” without performing an additional opening operation (NO in S16). (S22).

  However, as described later, if the opening operation is repeated and “open / close correction counter value = correction reference data value” is satisfied, an additional opening operation is performed (YES in S16), and reset of open / close correction counter 43 is performed. (0) is performed (S21). When the process of S21 is finished, the series of processes is finished, and the next processing routine is started. That is, since the value of the open / close management counter 42 is not updated this time, an additional opening operation for a half cycle is performed.

  When the process of S22 is performed instead of the additional opening operation, it is next determined whether the value of the opening / closing management counter 42 is the set value of the opening / closing stop angle data 47 (S25). In particular, it is first determined whether or not the full opening angle that is the end angle, that is, the opening / closing management counter 42 is “0”. If it is not the full opening angle (NO in S25), it is determined whether the opening / closing stop angle is S27. That is, “open / close management counter value = open / close stop angle data value” is determined, and if different, the next processing routine is executed (NO in S27). The processing when it is determined in S25 that the open / close management counter 42 is “0” will be described later in item d).

  However, when the opening operation is performed up to the value of the opening / closing stop angle data 47 set in S6 of FIG. 6, "opening / closing management counter value = opening / closing stop angle data value" is obtained, and it is determined that the opening / closing stop angle has been reached. (YES at S27). Then, an opening / closing stop process is performed in S29.

  That is, the braking of the induction motor 7 is instructed to the electric motor drive unit 6 in the same manner as the stop process in the above-described lifting operation. When there is an instruction to brake the induction motor 7, the gate control circuit unit 26 turns off the triacs 21, 22, and 23, stops applying the AC voltage to the induction motor 7, and sets the induction motor 7 by the electromagnetic brake 8. Start braking. Further, the calculation unit 40 of the MPU 4 turns on the triac 24 via the gate control circuit unit 26 and applies the DC current obtained by rectifying the AC voltage to the induction motor 7 to perform braking. At this time, the rotor of the induction motor 7 is braked, and the rotation of the induction motor 7 is stopped. Note that after a set time (for example, 1 second), the triac 24 is also turned off (the flow diagram is omitted). Further, a value “255” indicating that the opening / closing operation is not being performed is set in the opening / closing stop angle data 47.

  When the opening / closing stop process of S29 ends, the process proceeds to the next process routine. Since the value of “255” is set in the opening / closing stop angle data 47 in S29, it is determined that the non-opening / closing operation is in progress at the beginning S11 of the next opening / closing operation management routine (NO in S11). It becomes only this processing routine.

  As described above, when the current management angle is “29”, when any one of the angle setting switches 1001 to 1028 is pressed, the opening operation is performed from the fully closed angle to the management angle corresponding to the angle setting switch. Is done.

  If the above opening operation is other than the angle setting switch 1001, it is stopped at a management angle other than the end, but if any of the angle setting switches 1001 to 1029 is pressed again, the same as described above. In S2, it is determined that there is an opening / closing operation (YES in S2), and in S3, the opening / closing direction is determined from the relationship between the operation angle of the opening / closing operation and the current stop angle. When it is determined that “operation angle = current stop angle” as described above, the next processing routine is executed. When it is determined that “operation angle <current stop angle”, the forward operation is set by setting the forward rotation operation set in S4, and the opening / closing stop angle data 47 is set in S6. In this case, the same opening / closing operation management as in the above-described example is executed, and the operation is stopped at the set management angle.

  On the other hand, if it is determined that “operation angle> current stop angle”, the reversing operation is set in S5, and the management angle of operation management angles “2” to “29” is set in the opening / closing stop angle data 47 in S6. The corresponding table value of the table 41 is set, and the reverse operation, that is, the closing operation is set. It should be noted that the operation management angle “1” is omitted here because when the angle setting switch 1001 is pressed, it is an end angle of the forward rotation operation. This is because it is impossible.

  Then, at the beginning S11 of the opening / closing operation management routine, since the value of the opening / closing stop angle data 47 is not the invalid value “255”, it is determined that the opening / closing operation is being performed (YES in S11). In S12, “input” is determined every half cycle, and an inversion signal is being output in the process of S5 of the above-described opening / closing operation management routine. If determined (NO in S13), the process proceeds to S17.

Hereinafter, operations after S17 will be described.
b) Reversal Operation (Closed Operation) When Fully Closed Interlock Switch 11 is Off In S17 of FIG. 7, the calculation unit 40 of the MPU 4 determines whether or not the fully closed interlocked operation mode is set. In this case, the fully closed interlocking operation “NO” is determined in S17, and the process proceeds to S23 without executing S18 to S20.

  In S23, the arithmetic unit 40 increments the value of the opening / closing management counter 42 by “+1”, contrary to the opening operation. Then, the process proceeds to S 27 described above, and it is determined whether the value of the opening / closing management counter 42 is the set value of the opening / closing stop angle data 47. If it is determined that the condition is not satisfied (NO in S27), the next processing routine is executed. On the other hand, if it is determined that the condition is satisfied (YES in S27), the same open / close stop process as in the above opening operation is performed in S29, and the process proceeds to the next processing routine.

  Thus, when any one of the angle setting switches 1002 to 1029 is pressed and the operation management angle is larger than the stop management angle, the closing operation is performed to the management angle corresponding to the angle setting switch.

  Further, when any one of the angle setting switches 1001 to 1029 is repeatedly pressed, the processing as described above is repeated. In other words, when the operation management angle is the same as the stop management angle during operation, no opening / closing operation occurs, but when the operation management angle is smaller than the stop management angle during operation, the opening operation is performed, and conversely, when the operation management angle is large, the closing operation is performed. Will be repeated.

c) When the opening / closing operation is repeated when the fully closed interlocking switch 11 is OFF In the above-described reference data optimization process (S14), the first lower limit switch 19 is switched from ON to OFF in the opening operation after the lower limit stop. In S147, the value of the open / close management counter 42, that is, the effective value (“0” to “131”) at the timing when the lower limit switch 19 is turned off is set in the lower limit detection angle data 45.

  Therefore, when the opening / closing operation is repeated, if the lower limit switch 19 is turned off again from the ON state during the opening operation after the OFF lower limit switch 19 is turned on in the closing operation (YES in S142), the next S143 The lower limit detection angle data 45 is determined as “effective value” because the effective values of “0” to “131” are set. Then, in S144, the set value of the lower limit detection angle data 45 is compared with the value when the lower limit switch 19 is changed, that is, the value of the open / close management counter 42.

  When there is no difference in the angle data from the ON to OFF of the lower limit switch 19, it is determined that “management counter value−lower limit detection angle data value” is “= 0”, and the reference data optimization process only ends. Become.

  However, if the additional opening operation at the time of the above-described opening operation is not sufficient, the opening / closing range is lowered. In this case, since the lower limit switch 19 is changed from ON to OFF at a small management angle in the full opening angle direction, “management counter value−lower limit detection angle data value” is “<0” in S144. In step S145, the correction reference data 44 is set to “−1”. In S147, the value of the lower limit detection angle data 45 is updated and set to an effective value ("0" to "131") at the timing when the current lower limit switch 19 is turned off.

  As a result, the correction reference data 44 becomes smaller than before, and the additional opening operation in the subsequent repeated opening / closing operations increases. As a result, the degree of lowering of the opening / closing range becomes smaller or does not lower. If the degree is decreased but still descends, the timing value from the ON to the OFF of the lower limit switch 19 becomes smaller as described above, and the degree is further reduced by “−1”. It will not descend at the end.

  Even if the open / close range does not drop and the correction reference data 44 reaches the optimum value, the open / close range has fallen from the lower limit position. However, when the lower limit is reached in the next raising / lowering operation, that is, the lowering operation, it stops at the lower limit position, so that the opening / closing range is maintained at an appropriate height.

  On the other hand, when the additional opening operation at the time of the above-described opening operation is too large and the opening / closing range increases, the lower limit switch 19 changes from ON to OFF at a large numerical management angle in the fully closed angle direction. It becomes. That is, “management counter value−lower limit detection angle data value” is determined to be “> 0” in S144, and correction reference data 44 is “+1” in S145. In S147, the value of the lower limit detection angle data 45 is updated and set to an effective value ("0" to "131") at the timing when the current lower limit switch 19 is turned off.

  As a result, since the correction reference data 44 becomes larger than before, the additional opening operation in the subsequent repeated opening / closing operations is reduced. As a result, the degree to which the opening / closing range increases is reduced or does not increase. If the degree is small but still rises, it means that the timing value from ON to OFF of the lower limit switch 19 becomes larger. Further, it is further increased by “+1”, and the degree becomes smaller, and finally rises. Disappear.

  Note that when the opening / closing operation starts at the lower limit position, the lower limit switch 19 is turned from on to off at the fully closed angle or close to the fully closed angle. It will not turn on even when the fully closed angle is reached. That is, unlike the case where the opening / closing range is lowered, the lower limit switch 19 has fewer opportunities to be turned off, so that there is less opportunity for “+1” processing in S146, and as a result, the opening / closing range continues to rise. Also become. Therefore, as the initial value of the correction reference data 44, a value that the opening / closing range is lowered (a relatively large value that reduces the frequency of the additional opening operation) is recommended.

  As a result, when the opening / closing range greatly decreases, that is, even when the set value of the correction reference data 44 is reduced, the decrease of the opening / closing range does not converge and the value of the correction reference data 44 is constant from the normal value. In the case of being away, the height of the opening / closing range is greatly increased by the additional full opening operation at the time of the opening operation to the next “full opening angle”. This is described in item d).

d) Regarding angle management when the angle setting switch 1001 is pressed (the fully closed interlocking switch 11 is off) When the angle setting switch 1001 is pressed and the opening operation is performed to the fully open angle, the process proceeds to S25 described above. Thus, the fully open angle is determined (YES in S25). In the next S26, the set value of the lower limit detection angle data 45 set in S147 is determined. If the value of the open / close management counter 42 that is half or more of the open / close range, that is, a value less than “66” is set, the lower limit detection angle “<66” is determined. In S28, the value of the open / close management counter 42 is updated from “0” to “66”, and the value of the lower limit detection angle data 45 is updated to “255”. When this process is finished, the next processing routine is executed.

  As described above, when it is determined that the lower limit detection angle data 45 is less than “66” even when the full opening angle of the end portion angle is reached, the value of the opening / closing management counter 42 is not subjected to the opening / closing stop processing. The horizontal angle value. Therefore, the opening operation is continued until the value of the counter 42 becomes “0”. That is, the ascending operation is performed at the full open angle. As a result, the height of the opening / closing range is increased by the “66” value of the opening / closing management counter 42.

  The fact that the lower limit detection angle data 45 is less than “66” means that the height of the open / close range has dropped by half or more of the open / close range amount. The above-described additional fully opening operation is from “66” to “0” in the counter 42, which means that the height of the open / close range is increased by half of the open / close range amount. Therefore, the height of the opening / closing range at the time of stopping at the lower limit position from the substantially lowering operation is restored.

  Since the invalid value “255” is set in the lower limit detection angle data 45, even if the angle setting switch 1001 is pressed again and the opening operation is performed up to the full opening angle, the next opening operation is performed. Is determined as “> 65” in S26. Therefore, as described above, the additional full-opening operation by the processing of S28 (update of the value of the management counter 42) is not performed. Also, in the reference data optimization process of S14, since the process is performed in the same manner as the stop at the lower limit position from the lowering operation as described above, the lower limit detection acquired after the additional full opening operation at the above full opening angle. From the value of the angle data 45, the above-described optimization processing of the reference data for correction 44 and the additional full-open operation at the full-open angle are resumed.

  As described above, when the fully-closed interlock switch 11 is off, if the initial value of the correction reference data 44 is set to be insufficiently corrected, the operation at the lower limit position from the descent operation is stopped. As the opening / closing operation is repeated, the up / down change of the opening / closing range can be finally eliminated while the opening / closing range is constantly lowered.

e) Reversal Operation (Closed Operation) When Fully Closed Interlock Switch 11 is On When any of the fully closed interlock switch 11 is on, any one of the angle setting switches 1002 to 1029 is pressed, and the same as described above, FIG. When the closing operation is set in the opening / closing operation management routine of FIG. 7, in S17 of the opening / closing operation management routine of FIG. 7, it is determined that the fully closed interlocking operation is “YES”, and the height of the opening / closing range is corrected by the lower limit switch 19 ( S18 to S20, S24) are executed.

  First, in S18, whether the lower limit opening / closing range is right or wrong is determined based on the value (1 or 0) of the lower limit opening / closing range flag 46.

  When it is determined that it is not the lower limit opening / closing range, that is, when lower limit opening / closing range flag 46 is reset (0) (NO in S18), the process proceeds to S23, and the same processing as in the case where full-close interlock switch 11 is off is performed. Executed. That is, the “+1” process of the opening / closing management counter 42 is performed (S23), and it is determined whether the value is the set value of the opening / closing stop angle data 47 (S27). That is, whether or not “opening / closing management counter value = opening / closing stop angle data value” is determined, and if different, the next processing routine is executed (NO in S27). On the other hand, when the “+1” process in S23 is performed up to the set value of the opening / closing stop angle data 47, “open / close management counter value = open / close stop angle data value” is obtained, and the opening / closing stop angle is determined (YES in S27). ), An opening / closing stop process similar to that in the above-described opening / closing operation is performed in S29.

  As described above, when any one of the angle setting switches 1002 to 1029 is pressed when raising / lowering is stopped at an intermediate height that is not the lower limit opening / closing range, when the operation management angle is larger than the stop management angle, the above-described fully closed interlocking switch 11 is operated. As in the case where is OFF, the closing operation is performed until the open / close management counter 42 reaches the management angle table value corresponding to the angle setting switch.

  However, when the operation is stopped at the lower limit position from the lowering operation, the lower limit opening / closing range flag 46 is set (1), so that the lower limit opening / closing range is determined in S18 (YES in S18). In that case, next, in S19, it is determined whether the lower limit switch 19 is on or off. If the lower limit switch 19 is ON, "132" which is the table value of the fully closed angle is set in the open / close management counter 42 in S24, and the process proceeds to S29. In S29, the above-described opening / closing stop process is performed.

  Thus, in the present embodiment, when the fully closed interlocking switch 11 is on, if the lower limit switch 19 is turned on during the closing operation, regardless of the value of the open / close management counter 42 (representing the fully closed angle “ If the fully closed angle is reached, the counter 42 is also incremented and an opening / closing stop process is performed. Thereby, the height when the operation is stopped at the lower limit position from the lowering operation can always be managed as the height of the fully closed angle in the lower limit opening / closing range. That is, even if the height of the opening / closing range is shifted in the downward direction, it can always be corrected to the original height.

  If it is determined in S19 that the lower limit switch 19 is off, it is determined whether or not the count value of the open / close management counter 42 is a value immediately before the fully closed angle (S20). The “value immediately before the fully closed angle” specifically represents a value “half” before “132”, that is, “131”.

  If the count value of the open / close management counter 42 has not yet reached “131” (“other than 131” in S20), the process proceeds to S23 described above. Thereby, the “+1” process of the opening / closing management counter 42 is performed, and the closing operation is continued.

  On the other hand, when it is determined that the count value of the opening / closing management counter 42 has reached the value “131” immediately before the full closing angle (“131” in S20) while the lower limit switch 19 remains off, the opening / closing management counter 42 The process proceeds to the next processing routine without executing the “+1” process. That is, even if the count value of the open / close management counter 42 reaches the value “131” immediately before the full closing angle, the closing operation is continued unless the lower limit switch 19 is turned on. If the lower limit switch 19 is turned on (“ON” in S19), the table value “132” of the full-close angle is set in the open / close management counter 42 in S24, and the open / close stop process in S29 is performed. .

  In this way, if the lower limit switch 19 is not turned on during the closing operation, the closing operation is continued without counting up the opening / closing management counter 42, and if the lower limit switch 19 is turned on, the counting is increased and the opening / closing stop is stopped. Do. Thereby, the height when the operation is stopped at the lower limit position from the lowering operation can always be managed as the height of the fully closed angle in the lower limit opening / closing range. That is, even if the height of the open / close range is shifted in the upward direction, it can always be corrected to the original height.

  That is, when the fully closed interlocking switch 11 is on, the height at which the lower limit switch 19 is turned on is set to the fully closed angle in the lower limit opening / closing range regardless of the count value of the opening / closing management counter 42. Unlike the case where the interlock switch 11 is off, it is possible to always eliminate the elevation change of the lower limit opening / closing range.

  Therefore, when the fully closed interlocking switch 11 is on, the value of the lower limit detection angle data 45 is substantially the same value. Therefore, the above reference data optimization process (S14) and the additional fully opening operation at the fully opening angle are performed. Will not be performed. However, when the opening / closing operation without repeating the full-closed angle is repeated, if the set value of the correction reference data 44 is not an appropriate value, the height of the opening / closing range decreases or increases, so that the value is an appropriate value. This is preferable. That is, at the start of operation, it is recommended to use the fully-closed interlocking switch 11 turned on after the fully-closed interlocking switch 11 is turned off and the correction reference data 44 is set to an appropriate value. In the present embodiment, it is assumed that the full-close interlock switch 11 is switched from OFF to ON manually by an operator.

  In addition, the calculating part 40 may implement | achieve the function of switching from OFF to ON of the fully closed interlocking switch 11. FIG. Specifically, in S144 of the reference data optimization process, it is determined that there is no change in the lower limit detection angle data 45 (for example, it is the same value as the value of the open / close management counter 42 for three consecutive times). It is also possible to perform automatic switching when stopping at the lower limit position in the next lowering operation. That is, without using the fully-closed interlock switch 11 itself, the RAM 49 built in the MPU 4 can be defined and disposed as a fully-closed interlock flag.

  In this case, at the time of shipment, the fully closed interlock flag in the RAM 49 is set to “0” (invalid). If “= 0” is determined in S144, then a process of counting the number of times (hereinafter referred to as “number of coincidence”) is added. Then, when stopping at the lower limit position in the above-described lowering operation, it is determined whether or not the number of coincidence is three consecutive times. If so, the fully closed interlock flag in the RAM 49 is set (1) and validated. Thereby, in S17 of the opening / closing operation management routine, if the value of the fully-closed interlock flag is “1”, the calculation unit 40 determines the fully-closed interlock mode (YES in S17), and the value of the fully-closed interlock flag. If "0", it can be determined that the fully closed interlock mode is not set (NO in S17).

  As described above, in the present embodiment, by using the zero-cross signal from the zero-cross detector 5 and the lower limit switch 19, the opening / closing operation at the lower limit position at which the actual operating height is achieved is directly connected to the conventional motor shaft. Open / close angle management equivalent to that of the angle detection device is realized. Accordingly, even when the blind main body (blind portion 20) is installed outdoors, the angle detection device does not need to be an expensive waterproof type, so that it is possible to provide an inexpensive externally installed electric blind. .

<Specific examples of management angle value correction>
The characteristic processing part of the opening / closing angle management in the present embodiment as described above will be described more specifically with reference to FIGS.

  FIG. 9 is a timing chart showing an example of correction of the management angle value by the open / close correction counter 43. FIG. 10 is a timing chart showing an example of correction of the management angle value based on the lower limit detection angle data 45. FIG. 11 is a timing chart showing a first correction example of the management angle value by the lower limit switch 19. FIG. 12 is a timing chart showing a second correction example of the management angle value by the lower limit switch 19.

  In these timing charts, the vertical axis indicates the management angle (1 to 29). Since the opening / closing operation is also an ascending / descending operation, the vertical axis indicates the “height” of the blades 14 as well as the “angle” of 29 management angles. In addition, a circle mark indicates an operation angle, and a square mark indicates an actual stop angle (a deviation and a correction operation are reflected). As described above, the lower limit switch 19 is “ON” at the fully closed angle / height and is “OFF” near the upper side of the fully closed angle / height.

1. Example of Correction of Management Angle Value by Open / Close Correction Counter 43 First, an example of correction of the management angle value by the open / close correction counter 43 will be described with reference to FIG. It is assumed that “125” is set in the correction reference data 44.

  Timing TA1 is a tentative initial state, and is assumed to be a state where the lower limit switch 19 is stopped by the lowering operation. In this case, the management angle is “29”, and the open / close management counter 42 that is the management angle value is “132”. The open / close correction counter 43 is “0”. At timing TA1, there is no deviation between the management angle and the actual stop angle. Thereafter, it is assumed that an opening / closing operation to each management angle is performed at timings TA2 to TA9.

  If the angle setting switch 1018 is pressed at the timing TA1, the opening operation (forward rotation operation) is executed, the management angle “18”, the opening / closing management counter 42 is “78”, and the opening / closing correction counter 43 is It becomes "54" from {0+ (132-78)} and a small deviation occurs (TA2). If the angle setting switch 1021 is pressed in the state of timing TA2, the closing operation (reversing operation) is executed, so that the open / close correction counter 43 does not change (TA3). At timing TA3, there is no change in deviation.

  When the angle setting switch 1015 is pressed in the state of the timing TA3, the opening operation is executed, so that the deviation further increases and the opening / closing correction counter 43 is obtained from {54+ (90-66)}. It becomes “78” (TA4). Thereafter, it is assumed that the angle setting switches 1020 and 1028 in the closing direction are sequentially pressed. At timings TA4 to TA6, there is no change in the deviation from the actual angle, and the deviation remains large.

  However, since the opening operation is executed when the angle setting switch 1017 is pressed next time, the open / close correction counter 43 is set to “129” from {78+ (125−74)}, that is, for correction during the opening operation. The value of the reference data 44 becomes “125”, and the additional opening operation is executed to correct the angle deviation of the blade 14. Here, as a result of the opening / closing correction counter 43 being reset to “0” when it reaches “125”, at timing TA7, “129” is set to “4”. Then, the deviation from the actual angle is also corrected and almost disappeared (TA7).

  After that, the angle setting switch 1021 is pressed and the closing operation is performed, but the deviation from the actual angle remains small (TA8). When the angle setting switch 1016 is pressed, the opening operation is performed. As described above, the open / close correction counter 43 is set to “24” by {4+ (90−70)}, and the deviation from the actual angle also occurs. A small deviation occurs again (TA9).

  As described above, if the opening / closing correction counter 43 is set to “125” by the opening operation by pressing the angle setting switches 1001 to 1029 thereafter, the additional opening operation is performed and the deviation from the actual angle is corrected again. The above is repeated, but if the frequency of the additional opening operation is appropriate, the deviation from the actual angle will not be accumulated.

2. Example of Correction of Management Angle Value Based on Lower Limit Detection Angle Data 45 Next, an example of correction of the management angle value based on the lower limit detection angle data 45 will be described with reference to FIG. In this example, since the correction by the open / close correction counter 43 is insufficient, it is assumed that the open / close range is greatly lowered (deviation from the actual angle, for example, by 13 steps), and the timing TB1 indicates the state. Show.

  At the timing TB1, it is assumed that the lower limit detection angle data 45 is “69” because there is a deviation of, for example, 13 steps from the actual angle.

  At timings TB <b> 2 to TB <b> 5, the angle switch other than the end angle is pressed, but the lower limit switch 19 remains on because the angle shift is large. It is assumed that the angle setting switch 1001 is pressed in the state of timing TB5 and the fully open operation up to the fully open angle is performed. It is assumed that the lower limit switch 19 is switched from on to off when the opening operation is performed and the open / close management counter 42 is “60”. Then, it is determined in S142 that the lower limit switch 19 has been turned off from on, and the lower limit detection angle data 45 is changed to “60” of the open / close management counter 42 in S147. If the fully open angle, that is, the open / close management counter 42 becomes “0” in the continued opening operation, it is determined as a fully open angle in S25, and the lower limit detection angle is determined as “<66” in S26. Thus, the open / close management counter 42 is changed from “0” to “66”, and the lower limit detection angle data 45 is changed from “60” to “255”. As a result, a correction additional fully opening operation, that is, an additional opening operation for 14 stages, which is half of the opening / closing range until the opening / closing management counter 42 changes from “66” to “0”, is performed. "Has been greatly improved.

3. First Correction Example of Management Angle Value by Lower Limit Switch 19 Next, a first correction example of the management angle value by the lower limit switch 19 will be described with reference to FIG.

  At the timing TC1, the above 1. Similarly, it is assumed that the lower limit switch 19 is stopped when the lowering switch 19 is turned on. The timing TC1 is in the same state as the timing TA1. Also in this example, it is assumed that “125” is set in the correction reference data 44.

  In this example, a “displacement” in the downward direction occurs in the opening operation up to timings TC2 and TC4. When the angle setting switch 1029 is pressed in the state of the timing TC5, the “fully closed” closing operation is executed. However, since the opening / closing range is shifted in the downward direction, the opening / closing management counter 42 is set to “fully closed (132 ) "Before the lower limit switch 19 is turned on. Therefore, regardless of the value of the open / close management counter 42, the closing operation is stopped when the lower limit switch 19 is turned on (TC6) ("ON" in S19, S29). Thereby, the deviation of the open / close range in the downward direction is corrected.

4). Second Example of Correction of Management Angle Value by Lower Limit Switch 19 Next, a second example of correction of the management angle by the lower limit switch 19 will be described with reference to FIG.

  Timing TD1 shows a case where the opening / closing range is slightly shifted in the upward direction in the previous opening / closing operation. In this example as well, it is assumed that “125” is set in the correction reference data 44.

  It is assumed that correction by the open / close correction counter 43 described with reference to FIG. 9 is also performed during the opening operation from timing TD1 to TD2. Thereby, at the timing TD2, the opening / closing range is further shifted in the upward direction.

  Between timings TD2 to TD5, an angle setting switch other than the end angle is pressed and an opening / closing operation is performed. Even at timing TD5, the open / close range is still slightly shifted in the upward direction.

  When the angle setting switch 1029 is pressed in the state of the timing TD5 and the fully closed / closed operation is performed, the open / close range is shifted in the upward direction, so that the open / close management counter 42 becomes “132” corresponding to the fully closed angle. Even then, the closing operation is continued until the lower limit switch 19 is turned on. Specifically, when the number of half cycles “131” immediately before “fully closed” is reached in S20, the “+1” process of the open / close management counter 42 is not executed, and the closing operation is continued as it is. Thereafter, when the lower limit switch 19 is turned on (TC6), the closing operation is stopped ("ON" in S19, S29). Thereby, the shift of the opening / closing range in the upward direction is corrected.

<Modification>
In the above-described embodiment, the process (S145, S146) for appropriately correcting the correction reference data 44 is performed in units of “−1” or “+1” in units of “1”. When the change is large (in the case of a predetermined value or more), a large correction value (2 or more) may be used. That is, a plurality of correction values may be employed according to the magnitude of the difference between the value of the opening / closing management counter 42 and the value of the lower limit detection angle data 45.

  In the above-described embodiment, the lower limit detection angle data 45 is the angle data at the timing when the lower limit switch 19 changes from on to off, but it may be the angle data at the timing when the lower limit switch 19 is turned on from the opposite. . In the present embodiment, when the lower limit detection angle data 45 is greatly changed, the additional opening operation is performed and corrected. However, the additional opening operation amount is a fixed amount that is half of the opening / closing range. In other words, when there is a deviation of almost half of the open / close range, only the half of the deviation is corrected so that there is no deviation. Therefore, if the ON / OFF timing difference is large and the variation is large, the correction operation is performed. Variation occurs in the amount of deviation when performing, and a difference occurs in the deviation after correction. For this reason, it can be said that it is preferable to manage the angle data at the timing of turning on because the amount of deviation when performing the correction operation is eliminated if it is managed only at the timing of turning on.

  In the above-described embodiment, the condition for performing the additional full opening operation at the full opening angle is that the lower limit detection angle data 45 is about half or less of the opening / closing range (“<66” in S26), but this is limited. is not. For example, if the value is smaller than half, the opportunity for optimization of the correction reference data 44 is reduced, but the amount of elevation of the open / close range is reduced, which is preferable.

  In the above-described embodiment, the management angle is 29. However, the management angle is not limited, and an arbitrary number of stages such as 15 can be used.

  In the above embodiment, the opening / closing operation part in the opening / closing operation routine (the flow diagram is omitted) is used for the opening / closing operation part in the opening / closing range at the start of the lifting operation. It may be a routine.

  In the above-described embodiment, the controller 220 instructs to raise and lower and open / close one blind unit 20, but the plurality of blind units 20 may be operated by one controller 220. That is, a command signal from the controller 220 configured by the elevation command unit 9 and the opening / closing command unit 10 is not directly input to one MPU 4 but is input to the MPUs of a plurality of blind devices using a communication line. Thus, a plurality of blind portions 20 may be operated simultaneously. By doing so, it becomes possible to operate a plurality of blind portions simultaneously by one operation.

  In the above-described embodiment, the timing at which the lower limit switch 19 is turned on during the closing operation at the lower limit position is the angle data reset, that is, the fully closed angle (the value of the open / close management counter 42 is set to “132”). (S24), it is considered that resetting the height data to the lower limit height value that has been determined is also an effective process in terms of height data management. That is, the value of the height data when the lowering operation is performed from the upper limit position (height data is “0”) until the lower limit switch 19 is turned on without stopping lifting is determined as the lower limit height value. If the lower limit switch 19 is turned on during the closing operation, it is conceivable that not only the angle data is set to the fully closed angle, but also the height data is reset to the determined lower limit height value.

  In the above-described embodiment, the operation corresponding to the upward direction among the opening / closing operations is described as the opening operation, and the operation corresponding to the downward direction is the closing operation. However, the operation is not limited, and the corresponding operation is reversed. Also good.

  In addition, the control method (opening / closing operation method) which the control apparatus of the electric blind of this invention performs can also be provided as a program. Such a program can be recorded on an optical medium such as a CD-ROM (Compact Disc-ROM) or a computer-readable recording medium such as a memory card and provided as a program product. A program can also be provided by downloading via a network. Such a program may be read by a drive device (not shown) provided in the control box 200 and processed by the arithmetic unit 40 of the MPU 4, for example.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is a block diagram which shows schematic structure of the electric blind by embodiment of this invention. It is a conceptual diagram which shows the external appearance and structural example of the electric blind by embodiment of this invention. It is a block diagram which shows schematic structure of the electric motor drive part of the electric blind by embodiment of this invention. It is a block diagram which shows the structural example of MPU of the electric blind by embodiment of this invention. It is a figure which shows the example of a data structure of a management angle table. It is a flowchart which shows the opening / closing operation management routine in embodiment of this invention. It is a flowchart which shows the opening / closing operation | movement management routine in embodiment of this invention. It is a flowchart which shows the reference data optimization process in FIG. It is a timing chart which shows the example of amendment of the management angle value by the counter for opening and closing correction. It is a timing chart which shows the example of amendment of the management angle value by lower limit detection angle data. It is a timing chart which shows the 1st correction example of the management angle value by a lower limit switch. It is a timing chart which shows the 2nd correction example of the management angle value by a lower limit switch.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Power input part 2 Power supply transformer 3 Stabilization power supply part 4 MPU 5 Zero cross detection part 6 Motor drive part 7 Induction motor 8 Electromagnetic brake 9 Lift command part 10 Open / close command part 11 Fully closed interlock Switch, 13 Open / close drum, 14, 14a, 14b Blade, 15 Ladder cord, 16 Bottom rail, 17 Lifting tape, 18 Upper limit switch, 18A Protrusion, 19 Lower limit switch, 20 Blind section, 21-24 Triac, 25 Diode, 26 Gate control circuit unit, 40 arithmetic unit, 41 management angle table, 42 opening / closing management counter, 43 opening / closing correction counter, 44 correction reference data, 45 lower limit detection angle data, 46 lower limit opening / closing range flag, 47 opening / closing stop angle data, 49 RAM, 71 Deceleration mechanism, 72 Condensate , 91 Ascending switch, 92 Decreasing switch, 93 Stopping switch, 100 Head box, 102 Shaft, 104 Lifting drum, 112 Communication line, 114 Feeding line, 200 Control box, 202 High electric system, 204 Light electric system, 220 Controller, 300 Operation unit , 1001-1029 Angle setting switch.

Claims (10)

A control device for an electric blind that raises and lowers a blind portion and opens and closes a plurality of blades according to rotation of an induction motor,
Operation command means for accepting operation commands for raising and lowering the blind part and opening and closing the blades from a user;
Drive means for driving the induction motor;
A cycle detection means for detecting an AC power supply cycle supplied to the drive means;
Management angle storage means for storing the number of driving cycles corresponding to each of the plurality of management angles up to the end angle representing the fully open angle or the fully closed angle;
Control means for performing control to drive the induction motor by the drive means by determining the operation command from the operation command means,
The control means manages the angle of the blade based on the stored value of the management angle storage means by counting and managing the number of drive cycles representing the number of AC power supply cycles from the detection signal of the cycle detection means, When the operation command is a command to open / close the blades, an electric blind control device that performs control to stop the opening / closing operation at a management angle corresponding to the operation command. An opening / closing correction storage means for storing the number of drive cycles of the first operation corresponding to the upward direction of the opening / closing operation;
The control means further counts the number of drive cycles from the detection signal of the cycle detection means during the first operation and stores it in the open / close correction storage means, and the stored value of the open / close correction storage means is a constant value. 2. The electric blind control device according to claim 1, wherein additional driving is performed for a predetermined number of cycles each time. Reference value storage means for storing a drive cycle reference value for providing a difference in the number of drive cycles depending on the opening and closing direction;
A lower limit detecting means for detecting that the blind portion has been lowered to the lower limit position while maintaining the end angle;
A lower limit detection angle storage means for storing the lower limit drive cycle number,
The control means further sets the lower limit drive cycle number as the lower limit drive cycle number when the detection signal from the lower limit detection means is changed when the opening / closing operation is started at the lower limit position. If the lower limit drive cycle number is stored in the detected angle storage means and the drive cycle reference value stored in the reference value storage means is different from the old stored value of the lower limit detection angle storage means, The control device for an electric blind according to claim 2, wherein the control device is changed in a direction not changing.   In the control means, during the first operation, the number of drive cycles that have been count-controlled becomes a first drive cycle number corresponding to a first end angle that is an end angle in the upward direction. In this case, when it is determined that the difference between the lower limit drive cycle number and the second drive cycle number corresponding to the second end angle that is the end portion angle in the descending direction exceeds a predetermined value, the lower limit drive cycle 4. The electric blind control device according to claim 3, wherein the first operation is added beyond the first end angle in a direction in which the number of cycles becomes the second number of driving cycles. 5. .   The control means further detects that the lowering has been lowered from the lower limit detecting means to the lower limit position during the second operation corresponding to the descending direction of the opening / closing operation as an interlocking process based on the detection signal from the lower limit detecting means. The control device for an electric blind according to claim 3 or 4, wherein when the lower limit detection signal shown is input, the second operation by the driving unit is stopped.   Further, as the interlocking process based on the lower limit detection signal, the control means further includes the lower limit even if the number of drive cycles that are count-controlled during the second operation becomes the second drive cycle number. 6. The control device for an electric blind according to claim 4, wherein the driving is continued until a lower limit detection signal indicating that the detection means has lowered to the lower limit position is input. Further comprising interlock selection means for accepting a selection as to whether or not to execute the interlock processing from the user,
The control device for an electric blind according to claim 5 or 6, wherein the interlocking process is executed only when the user selects to execute the interlocking process.   7. The control unit according to claim 5, wherein, when it is determined that the lower limit drive cycle number continuously matches the old stored value for a predetermined number of times, the control unit sets the interlocking process to be effective in the subsequent opening / closing operation. Electric blind control device. A method for controlling an electric blind that raises and lowers a blind portion and opens and closes a plurality of blades according to rotation of an induction motor,
For each of the plurality of management angles, preparing a management angle storage means in the memory for storing the number of drive cycles up to the end angle representing the fully open angle or the fully closed angle in correspondence with each other;
A step of operating a driving means for driving the induction motor by determining the operation command when an operation command for raising / lowering the blind part or opening / closing the blade is received from a user;
Counting and managing the number of drive cycles representing the number of AC power supply cycles supplied to the drive means;
Managing the angle of the blade based on the count-controlled number of drive cycles and the stored value of the management angle storage means;
And a step of stopping the opening / closing operation at a management angle corresponding to the operation command when the operation command is a command for opening / closing the blade. A control program for an electric blind that raises and lowers a blind portion and opens and closes a plurality of blades according to rotation of an induction motor,
For each of the plurality of management angles, preparing a management angle storage means in the memory for storing the number of drive cycles up to the end angle representing the fully open angle or the fully closed angle in correspondence with each other;
A step of operating a driving means for driving the induction motor by determining the operation command when an operation command for raising / lowering the blind part or opening / closing the blade is received from a user;
Counting and managing the number of drive cycles representing the number of AC power supply cycles supplied to the drive means;
Managing the angle of the blades based on the count-controlled number of drive cycles and the stored value of the management angle storage means;
A control program for an electric blind that causes a computer to execute a step of stopping an opening / closing operation at a management angle corresponding to the operation command when the operation command is a command for opening / closing the blade.

Images