JP5416635B2 - Home automation converter - Google Patents

Description

  The present invention relates to a home automation (hereinafter referred to as HA) conversion device, and more particularly, to an HA conversion device that enables remote control of a device that does not have an HA terminal.

  Home automation is to connect terminal devices such as air conditioners, fully automatic baths, floor heating equipment, etc. to HA control devices installed in the home via the HA terminal, and operate those devices by operating the HA control device. Enable. Further, the HA control device can communicate with the management center via a public line or the like, and the terminal device can be operated by remote control from a customer's mobile phone or the like.

  An HA converter provided between the HA control device and the terminal device is proposed in order to enable remote operation via the HA control device even for a terminal device that does not have an HA terminal. Yes. For example, it is described in Patent Document 1.

  The HA conversion device has an HA terminal that can be connected to the HA control device, has a power switch of the terminal device and a relay switch that constitutes a three-way circuit, receives a control signal from the HA control device, and responds to it. The relay switch is switched to monitor the energization state of the terminal device and send a monitor signal to the HA control device. The terminal device is, for example, a lighting device, and a three-way switch is configured by an internal switch in the HA converter and a power switch of the lighting device, and the lighting device can be remotely operated to turn on or off the power. Therefore, it is possible to monitor the energization state of the lighting equipment.

JP 2006-191419 A

  The three-way circuit can be switched between an energized state and a non-energized state by operating either of the two switches. When one switch of the three-way circuit is configured by a relay switch in the HA converter, it is necessary to switch to the set side or the reset side according to the current state of the relay switch.

  However, when the power is turned on, the state of this relay switch is unknown, and the three-way circuit switch may not be correctly operated by remote control.

  Accordingly, an object of the present invention is to provide an HA converter capable of normally switching a three-way circuit.

A first aspect of the present invention is an HA converter connected to a home automation (hereinafter referred to as HA) control device via an HA terminal,
An internal switch that can be switched to a set or reset state by configuring a three-way circuit together with an external power supply and an external switch;
A flip-flop that latches information corresponding to the internal switch state; in response to a control signal from the HA control device, the internal switch is opposite to the internal switch state of the flip-flop on the set side or the reset side And an internal switch drive circuit that inverts the state of the flip-flop,
A closed circuit connected to the set or reset side of the internal switch and the external power supply, and an internal switch state determining circuit for setting the state of the flip-flop according to the energized state of the closed circuit.

  In a preferred aspect of the first aspect, the internal switch state determination circuit makes the closed circuit energizable in response to an initial setting signal that is temporarily generated when the power is turned on. The flip-flop is set according to whether the closed circuit is energized or not.

  Further, the home automation system includes the HA conversion device described above and an HA control device connected to the HA conversion device via an HA terminal and outputting a control signal to the HA conversion device.

  According to the first aspect, since the internal switch state determination circuit determines the state of the internal switch and presets the state of the flip-flop in the internal switch drive circuit, in response to a remote operation, The state can be reversed correctly.

It is a figure which shows the structure of the home automation (HA) system and HA converter in this Embodiment. 6 is a diagram for explaining the operation of an internal switch drive circuit 23. FIG. 6 is a diagram for explaining the operation of an internal switch drive circuit 23. FIG. It is a specific circuit diagram of the HA conversion device in the present embodiment. It is a wave form diagram which shows operation | movement of the HA converter in this Embodiment.

  FIG. 1 is a diagram showing a configuration of a home automation (HA) system and an HA conversion device in the present embodiment. The HA system includes an HA control device 10 and a terminal device such as a heat source device 36 whose operation is controlled by an operation from the HA control device 10. The HA control device 10 is installed in a living room of a house, for example, and centrally operates and controls one or a plurality of terminal devices connected to the HA control device 10 via HA terminals.

  In recent years, the HA control device 10 is connected to the management center 34 via a public communication line, and the management center 34 instructs the HA control device 10 to generate a control signal in response to a user's operation from the mobile phone 38 or the like. In response, the HA control device 10 controls the terminal device 36. With this configuration, the user can remotely operate the terminal device in the home.

  The HA terminal standardized by the Japan Electric Appliances Industry Association HA terminal (JEM-A) standard is described in Patent Document 1 described above. That is, the HA terminal is composed of two communication lines, and a control signal and a monitor signal are transmitted / received by a photocoupler.

  The terminal device 32 can be switched between an energized state and a non-energized state by the external switch 30. In the example of FIG. 1, the terminal device 32 is a lighting device. The HA converter 20 is provided between the HA controller 10 and the terminal device 32 in order to enable remote control by the HA controller 10 of the terminal device not provided with the HA terminal as described above.

  The HA converter 20 constitutes a three-way circuit together with the external power supply AC and the external switch 30, and has an internal switch 24 that can be switched to a set or reset state. The internal switch 24 is, for example, a relay switch. As shown in FIG. 1, when the external switch 30 or the internal switch 24 is switched, the external power source AC is switched between a state where the terminal device 32 is energized and a state where it is not energized. With this three-way circuit, the user can control the ON / OFF of the terminal device 32 as usual with the external switch 30, and also uses the function of the HA control device 10 to switch and control the internal switch 24 by remote operation. Thus, the terminal device 32 can be controlled on and off.

  Further, the HA conversion device 20 has a control circuit 27 that controls the internal switch 24 to determine the energization state of the terminal device 32. The control circuit 27 receives a control signal from the control signal transmission circuit 14 in the HA control device 10 and transmits a control signal S21 to the inside, and a monitor signal for determining the energization state of the terminal device 32. And a monitor signal transmission circuit 22 for transmitting to the monitor signal reception circuit 12 in the HA control device 10.

  The control circuit 27 has an internal switch drive circuit 23 that drives the internal switch 24 to the set side or the reset side. The internal switch drive circuit 23 is a flip-flop FF1 that latches information corresponding to the state of the internal switch 24. In response to the control signal S21 from the HA control device, the internal switch 24 is driven to the side opposite to the internal switch state of the flip-flop FF1 on the set side or the reset side, and the state of the flip-flop FF1 Invert.

  Further, the control circuit 27 includes a circuit 25 that determines the energization state of the terminal device 32.

  In the internal switch drive circuit 23, a flip-flop FF1 is provided as a latch circuit for latching information corresponding to the state (set or reset) of the internal switch 24, and responds to the control signal S21 supplied from the control signal receiving circuit 21. Then, the state of the internal switch 24 is switched based on the state of the flip-flop FF1.

  As will be described later, the internal switch drive circuit 23 generates a coil current on the set side or the reset side of the internal switch 24 in response to the control signal S21, and switches the state of the internal switch 24. Which coil current is generated depends on the state of the flip-flop FF 1 that latches information corresponding to the state of the internal switch 24. However, since the state of the flip-flop FF1 is set or reset when the power is turned on or the like is indefinite, if the state of the flip-flop FF1 does not match the state of the internal switch 24, the control signal Switching may not be performed properly. This will be described below.

  2 and 3 are diagrams for explaining the operation of the internal switch drive circuit 23. FIG. FIG. 2 shows (1) operation on the contact side of the relay switch, which is an internal switch, and (2) operation on the reset side. In either case, the state of the flip-flop FF1 matches the state of the internal switch 24 and operates normally.

  When the relay switch of FIG. 2 (1) is on the set side, if the state of the flip-flop FF1 is the output Q = H and −Q = L (set state), the internal switch is responded to the control signal at time t1. The drive circuit 23 generates a coil current on the reset side, and then inverts the state of the flip-flop FF1. Further, in response to the control signal at time t2, a coil current on the set side is generated, and then the state of the flip-flop FF1 is inverted. The control signal at time t3 is the same as at time t1.

  Next, when the relay switch of FIG. 2 (2) is on the reset side, if the state of the flip-flop FF1 is the output Q = L and −Q = H (reset state), in response to the control signal at time t11. The internal switch drive circuit 23 generates a coil current on the set side, and then inverts the state of the flip-flop FF1. Further, in response to the control signal at time t12, a reset side coil current is generated, and then the state of the flip-flop FF1 is inverted.

  FIG. 3 shows (1) the operation on the contact side of the relay switch, which is an internal switch, and (2) the operation on the reset side. However, because the state of the flip-flop FF1 does not match the state of the internal switch 24, this is an example of an abnormal operation.

  When the relay switch of FIG. 3A is on the set side, if the state of the flip-flop FF1 is the output Q = L and −Q = H (reset state) for reasons such as indefinite operation at the time of power activation, the time t31 In response to the control signal, the internal switch drive circuit 23 generates a coil current on the set side, and then inverts the state of the flip-flop FF1. However, since the relay switch is on the set side, the switch state cannot be switched by the coil current on the set side. However, when the coil current on the reset side is generated in response to the control signal at the next time t32, the relay switch on the set side is normally switched. Thereafter, the flip-flop FF1 operates normally because the state of the flip-flop FF1 matches the state of the relay switch.

  Next, when the relay switch of FIG. 3 (2) is on the reset side, if the state of the flip-flop FF1 is the output Q = H and −Q = L (set state), in response to the control signal at time t41. The internal switch drive circuit 23 generates a coil current on the reset side, and then inverts the state of the flip-flop FF1. However, the relay switch is not switched because it is on the reset side. However, when the coil current on the set side is generated in response to the control signal at the next time t42, the relay switch on the reset side is normally switched. After that, it operates normally in the same way.

  In order to prevent the above abnormal operation, the HA converter 20 of the present embodiment of FIG. 1 has an internal switch state determination circuit 26 that determines the contact position (state) of the internal switch SW. The internal switch state determination circuit 26 determines the switch state and records information corresponding to the state in the flip-flop FF1. As a result, the state of the flip-flop FF1 can be made to correspond to the internal switch state.

  Hereinafter, as an example, an internal switch state determination circuit that determines the state of the internal switch at the time of power-on and sets the flip-flop FF1 to the corresponding state will be described.

  FIG. 4 is a specific circuit diagram of the HA converter according to the present embodiment. FIG. 4 shows a circuit diagram of the internal switch drive circuit 23, the internal switch state determination circuit 26, and the terminal device state determination circuit 25 in the HA converter 20 of FIG.

  First, the internal switch drive circuit 23 will be described. The internal switch drive circuit 23 includes a flip-flop FF1, NOR gates NOR1 and NOR2, a set side coil S and a reset side coil R, and NPN drive transistors N1 and N2 for driving them, respectively. A control signal S21 from the control signal receiving circuit 21 is supplied to the clock terminal CL of the flip-flop FF1. The control signal S21 is a negative logic pulse signal unlike FIGS. 2 and 3, and the control signal level for switching the internal switch 24 is L level. The inverted output -Q of the flip-flop FF1 is connected to the data terminal D. The control signal S21 and the output Q are input to the NOR gate NOR1, and the output is supplied to the base of the drive transistor N1. On the other hand, the control signal S21 and the inverted output -Q are input to the NOR gate NOR2, and the output is supplied to the base of the driving transistor N2.

  Therefore, when the L level control signal S21 is supplied, one of the NOR gates NOR1 and NOR2 sets the output to the H level, and one of the drive transistors N1 and N2 becomes conductive, and the set side coil S or the reset side coil R 1 is driven to switch the internal switch 24. Since the inverted output -Q is input to the data terminal D of the flip-flop FF1, the flip-flop FF1 is switched in response to the rising edge of the control signal S21 after the drive current flows through one of the coils.

  That is, in response to the control signal S21, the internal switch drive circuit 23 sends a drive current to the coils S and R on the opposite side to the state of the flip-flop FF1, and inverts the state of the flip-flop FF1.

  The terminal device state determination circuit 25 has a closed circuit CC2 including a terminal device 32 that is a lighting device, an external switch 30, an internal switch 24, and a power source AC, and a photocoupler 44 is provided in the closed circuit CC2. Yes. The state of the three-way circuit in FIG. 4 is a state in which the internal switch 24 is on the reset side and the power supply 32 is energized to the terminal device 32 together with the state of the external switch 30. As described above, when the terminal device 32 is in the energized state, the closed circuit CC2 passes a current, and a current flows to the monitor signal transmission circuit 22 via the photocoupler 44. If the terminal device 32 is in a non-energized state, the closed circuit CC2 does not flow current, and no current is generated in the monitor signal transmission circuit 22. A signal indicating both states is output from the monitor signal transmitting circuit 22 to the monitor signal receiving circuit 12 in the HA control device 10.

  Next, the internal switch state determination circuit 26 will be described. FIG. 5 is a waveform diagram showing the operation of the HA converter.

  The internal switch state determination circuit 26 has a closed circuit CC1 that detects whether the internal switch 24 is on the set side. That is, in the example of FIG. 4, when the internal switch 24 is on the set side, the current of the power source AC can flow into the closed circuit CC1. Furthermore, due to the delay circuit consisting of resistor R1 and capacitor C1, node n10 rises slowly with a CR time constant when power supply HV is started at time t50, and PNP transistor P3 conducts until node n10 goes high. The current I1 is supplied, and the closed circuit CC1 becomes conductive by the phototriac 40.

  If the internal switch 24 is on the set side, the current I2 flows through the closed circuit CC1, and if the internal switch 24 is on the reset side, I2 does not flow. When the current I2 is generated in the closed circuit CC1 (internal switch is set), the NPN transistor N4 becomes conductive through the photocoupler 42 in response to the current I2, and the node n12 becomes L level. On the other hand, when the current I2 is not generated in the closed circuit CC1 (the internal switch is in the reset state), the NPN transistor N4 is non-conductive, and the node n12 becomes H level by the resistor R4. In FIG. 5, the operation waveform when the internal switch is set is indicated by a solid line, and the operation waveform when the internal switch is reset is indicated by a broken line.

  On the other hand, another delay circuit is formed by the resistor R7 and the capacitor C2, and this CR time constant is smaller than that of the delay circuit formed by the resistor R1 and the capacitor C1, and the node n14 rises sharper than the node n10 when the power supply HV is activated. Therefore, the node n14 becomes H level at time t51 while the node n10 is still L level. In response to the rising edge of the node n14, the second flip-flop FF2 takes in the L level (the internal switch is in the set state) or the H level (same reset state) of the node n12. As a result, the output of the second flip-flop FF2 becomes Q = L, −Q = H (set state) or Q = H, −Q = L (reset state).

  When the second flip-flop FF2 takes in the level of the node n12, since the node n10 is still at the L level, the bases of the PNP transistors P5 and P6 are at the L level. The collectors of the transistors P5 and P6 are connected to the reset terminal R and the set terminal S of the flip-flop FF1, and are further connected to the ground GND via the resistors R7 and R8. Therefore, if the internal switch is in the set state, the output of the flip-flop FF2 is Q = L, −Q = H, the set terminal S of the flip-flop FF1 becomes H level, and FF1 is set. Conversely, if the internal switch is in the reset state, the output of the flip-flop FF2 is Q = H, −Q = L, the reset terminal R of the flip-flop FF1 becomes H level, and FF1 is reset.

  Thereafter, at time t52, the node n10 reaches the H level, the transistors P5 and P6 become non-conductive, and the reset terminal R and the set terminal S of the flip-flop FF1 are both set to the ground level (L level) via the resistors R7 and R8. Become. Thereafter, the flip-flop FF1 performs a normal operation of latching the level of the data terminal D in response to the rising edge of the clock terminal CL.

  As described above, the internal switch state determination circuit 26 can determine the state of the internal switch 24 at the time of power activation only by providing the closed circuit CC1 connected to the set or reset side of the internal switch 24 and the external power supply AC. it can. Then, the state of the flip-flop FF1 in the internal switch drive circuit 23 is set to the internal switch 24 according to the determination result.

  After the above initial setting, the internal switch drive circuit 23 performs a drive operation of the terminal device 32 by a three-way circuit in response to the control signal S21. When the control signal S21 becomes L level at time t53 in FIG. 5, according to the state of the flip-flop FF1, one of the outputs of the NOR gates NOR1 and NOR2 becomes H level, and one of the drive transistors N1 and N2 And a drive current is passed through either the set side coil or the reset side coil. Then, in response to the rising edge of the control signal S21 at time t54, the clock terminal CL of the flip-flop FF1 becomes H level, and the state of the flip-flop FF1 is switched. This operation has already been described. Thereafter, when the control signal S21 is input again, the same operation as described above is repeated.

  As described above, according to the present embodiment, the internal switch drive circuit 23 is provided with a simple closed circuit CC1, and the circuit (R1, C1) that detects the power supply activation and the closed circuit CC1 when the power supply is activated A circuit (P3,40) that enables I2 to flow, a circuit (42, R4, N4) that detects the presence or absence of current in closed circuit CC1 at that time, and a set terminal of flip-flop FF1 depending on the presence or absence of that current Alternatively, the state of the internal switch 24 can be initialized in the flip-flop FF1 simply by providing a circuit (FF2, P5, P6) for driving the reset terminal. As a result, the abnormal operation of FIG. 3 can be avoided.

  Note that if the delay circuits R1 and C1 that detect the power activation detect not only the power activation but also the operation of a hardware reset switch (not shown), the response of the flip-flop FF1 even in response to a manual reset operation. The state can be initialized to the internal switch state.

  In addition, the flip-flop FF2 in the internal switch state determination circuit 26 only latches the level of the node n12 at the time of power activation, and does not perform switching operation during normal operation. Therefore, it is not always necessary to provide the flip-flop FF2. Absent. Furthermore, it goes without saying that the closed circuit CC1 may be connected to the reset side of the internal switch 24.

10: HA control device 20: HA conversion device 21: Control signal receiving circuit 22: Monitor signal transmission circuit 23: Internal switch drive circuit 24: Internal switch, relay switch 25: Terminal device state determination circuit 26: Internal switch state determination circuit CC1 : Closed circuit FF1: Flip-flop S21: Control signal

Claims (3)

An HA converter connected to a home automation (hereinafter referred to as HA) control device via an HA terminal,
An internal switch that can be switched to a set or reset state by configuring a three-way circuit together with an external power supply and an external switch;
A flip-flop that latches information corresponding to the internal switch state; in response to a control signal from the HA control device, the internal switch is opposite to the internal switch state of the flip-flop on the set side or the reset side And an internal switch drive circuit that inverts the state of the flip-flop,
HA conversion comprising a closed circuit connected to the set or reset side of the internal switch and the external power supply, and having an internal switch state determining circuit for setting the state of the flip-flop according to the energized state of the closed circuit apparatus. In claim 1,
The internal switch state determination circuit makes the closed circuit energizable in response to an initial setting signal that is temporarily generated when the power is turned on, depending on whether the closed circuit is energized or not energized in the energized state. HA converter for setting the flip-flop. HA converter according to claim 1 or 2,
A home automation system comprising: an HA controller connected to the HA converter via an HA terminal and outputting a control signal to the HA converter.

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