JPH0810957B2 - Remote control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is for remotely controlling a control target device such as various electric appliances in a home or various devices in a factory by a central control device. Of equipment.

[Conventional technology]

2. Description of the Related Art In recent years, a device called a home automation device that centrally controls various electric appliances in a home has been put into practical use. As a control center of such a device, a control device using a microcomputer device is used.

FIG. 1 is a block diagram showing a conventional general structure of the apparatus as described above.

In the figure, A is a central control unit, R1, R2, and R3 are control target devices that are remotely controlled by the central control unit A, and B, C, and D are control target devices that receive instructions from the central control unit A, respectively.
An interface unit as a terminal control device for controlling R1, R2, R3, and 1 is a signal transmission line for connecting the central control device A and each interface unit B, C, D.

In addition, the switches Sb and S attached to the central control unit A
c and Sd are remote control switches for controlling the control target devices R1, R2 and R3 via the interface units B, C and D, respectively, and switches attached to the respective control target devices R1, R2 and R3. S1, S2, S3 are hand switches for operating the respective controlled devices R1, R2, R3 at hand.

In such a remote control device, each controlled device R1, R2,
When the remote control switches Sb, Sc, Sd are turned on, the control command R3 is sent to the transmission line 1 with the destination address added to each of the control target devices R1, R2, R3. In each interface unit B, C, D, the destination address of the control command received via the transmission line 1 is collated with its own address, and if they match, the address is accepted and each controlled device is operated according to the command. R1, R2, R3
Control.

On the other hand, the control target devices R1, R2, R3 are respectively provided with hand switches S1, S2, S3. This is intended for backup and improvement of operability when the central control unit A fails. Conventionally, the relationship between the hand switches S1, S2, S3 and the central control unit A is generally set to a logical sum (OR) relationship (Japanese Patent Laid-Open No. 58-66491). (Sho 58-60894, etc.) That is, if one of the remote control switches Sb, Sc, Sd or the hand switches S1, S2, S3 of the central control unit A is turned on, the corresponding control target device R1, R2, R3
Conventionally, the state of operating is common.

[Problems to be Solved by the Invention]

By the way, it is conceivable that such a remote control device will be systematically developed and have more various and versatile functions in the future. In such a case, in the conventional device, the device to be controlled may be remotely operated contrary to manual operation, causing various problems in terms of safety and operability. That is, even if a person near the controlled device operates the hand switch, remote control is given priority and the hand switch is disabled, or conversely, remote control is performed regardless of the intention of the person near the controlled device. The control may cause a controlled device to operate and cause a dangerous state.

The present invention has been made in view of such circumstances, and an object thereof is to provide a remote control device capable of prohibiting remote control of a control target device and improving safety and operability.

Further, since various inconveniences may occur even if the user forgets that the remote control is prohibited, it is an object of the present invention to provide a remote control device that automatically releases the prohibited state of the remote control according to a predetermined condition.

Further, when remote control is prohibited, it is another object of the present invention to provide a remote control device capable of distinguishing from a failure of a signal transmission line by giving a signal to that effect to the central control device. .

[Means for solving the problem]

In the remote control device of the present invention, a switch means for prohibiting remote control is provided on the side of the device to be controlled in addition to the hand switches to be controlled respectively. Further, when the control device tries to perform the control while the above-mentioned switch means is turned on and the remote control is prohibited, the alarm is issued and the remote control is prohibited again by the elapse of a predetermined time. When the switch means is not operated, it is automatically returned to a state in which remote control is possible. Further, it is also provided with means for notifying the central control unit that the remote control is prohibited.

[Action]

In the remote control device of the present invention, when the switch means for prohibiting the remote control is turned on, the remote control by the central control device is prohibited, so that the safety and operability are improved. Further, the remote control prohibited state is automatically released according to a predetermined condition, and the remote control prohibited state is transmitted to the central controller.

Example of Invention

Hereinafter, the present invention will be described in detail with reference to the drawings showing an embodiment thereof.

The remote control device of the present invention is basically applied to a remote control device similar to that shown in FIG.

That is, in the figure, A is a central control unit, R1, R2, and R3 are control target devices remotely controlled by the central control unit A, B, C, and
D is an interface unit as a terminal control device that controls the control target devices R1, R2, R3 in response to instructions from the central control device A, and l is the central control device A and each interface unit B, C, D Is a signal transmission line for connecting the.

In addition, the switches Sb and S attached to the central control unit A
c and Sd are remote control switches for controlling the control target devices R1, R2 and R3 via the interface units B, C and D, respectively, and switches attached to the respective control target devices R1, R2 and R3. S1, S2, S3 are hand switches for operating the respective controlled devices R1, R2, R3 at hand.

FIG. 2 is a circuit diagram showing the configuration of one control target device R1 and its interface unit B in the above-mentioned device, and the other control target devices R2, R3 and interface units C, D are also the same. .

The interface unit B includes a transmitting / receiving circuit 11, a CPU12,
It is composed of a self-address switch 13, a control relay 14, a speaker 16, an amplifier 15 thereof, a remote control prohibiting switch IS and the like.

The transmission / reception circuit 11 receives a control command and transmits a monitor signal or a response signal to / from the transmission line 1.

The CPU 12 is the control center of the interface unit B, and the signal from the central control unit A is input to the external interrupt terminal INT via the transmission / reception circuit 11, and the central control unit A is output from the output port P11 via the transmission / reception circuit 11. Output signal to.

The self-address switch 13 generates a self-address assigned to identify the controlled device R1 corresponding to the interface unit B and outputs it to the port P0 of the CPU 12.

The control relay 14 causes the relay coil 14C to be generated when the control signal output from the output port P12 of the CPU 12 is at a high level to cause the normally open contact 14a to circuit, and when the control signal is at a low level, the relay coil 14C. Is excited to close the normally open contact 14a.

The speaker 16 outputs this signal when the high level output is output from the output port P25 of the transmission / reception circuit 11.
An alarm sound is generated by being amplified and given by 15.

The remote control inhibit switch IS is activated when it is turned on.
The input signal to the input port P24 of the CPU 12 is changed from high level to low level.

The controlled device R1 is an outlet that is connected to a commercial power source.
21, relay 22, current detection circuit 23, load 24 and hand switch S
It is composed of 1 etc.

The outlet 21 is connected to the control relay 14 of the interface unit B, the relay 22 of the control target device R1, and the load 24. Specifically, one line of the outlet 21 has a normally open contact 14a of the control relay 14 and a relay coil 2 of the relay 22.
It is connected to the other line via 2C. Further, one line of the outlet 21 is also connected to one end of each of the normally open contact 22a and the normally closed contact 22b of the relay 22. The other line of the outlet 21 is connected to the first normally open contact a1 and the first normally closed contact b1 of the hand switch S1 via the load 24 (light bulb in this embodiment).
Connected to one end of each.

The other end of the normally open contact 22a of the relay 22 is connected to the other end of the first normally open contact a1 of the hand switch S1, and the other end of the normally closed contact 22b of the relay 22 is connected to the first normally closed contact b1 of the hand switch S1. It is connected to each of the other ends.

Also, one end of the second normally open contact a2 of the hand switch S1 is CP
The input port P21 of U12 is connected to the input port P22 of the CPU12, and one end of the second normally closed contact b2 is also connected to the second normally open contact 2a.
The other end of the second normally closed contact 2b is grounded.

The current detection circuit 23 detects the current flowing through the load 24 and uses the result as a load status signal for the input port P of the CPU 12.
Giving to 23.

Therefore, the normally open contact of the relay 22 is opened and the normally closed contact is closed by the state shown in FIG. 2, that is, the normally open contact 14a of the control relay 14 is opened, and the first normally open contact of the hand switch S1 is closed.
When a1 is opened and the first normally closed contact b1 is closed, the load from the outlet 21 to the load 24, the first normally closed contact b1 of the hand switch S1, the normally closed contact 22b of the relay 22 and the outlet 21 The load 24 operates because a closed circuit is formed in the path.

In this case, the second normally-closed contact b2 of the hand switch S1 is closed, and the second normally-open contact a2 of the same switch S1 is opened, so that the CPU12
Input low level signal to P22 and high level signal to P21.
The operating state of the load 24 is detected by 23, and a load state signal is given to the input port P23 of the CPU 12. The CPU 12 grasps the relationship between the state of the hand switch S1 and the operating state of the load 24 from the input signals to the input ports P21, P22, P23.

On the other hand, from the state shown in FIG. 2, output port P12 of CPU12
When the output signal of turns to a low level, the relay coil 14C of the control relay 14 is excited and its normally open contact 14a is closed,
As a result, the relay coil 22C of the relay 22 is excited, so that the normally open contact 22a of the relay 22 is closed and the normally closed contact 22b of the relay 22 is closed.
Opens. In such a state, from the above-mentioned outlet 21 to the load 24, the first normally-closed contact b1 of the hand switch S1,
The normally closed contact 22b of the relay 22 and the closed circuit formed by the path of the outlet 21 are opened by opening the normally closed contact 22b of the relay 22. Therefore, the load 24 becomes non-operational. Conversely, if the output signal of the output port P12 of the CPU 12 shifts to a high level from this state, the normally closed contact 22b of the relay 22 is closed again, and the load 24 is put into operation.

Further, in the state shown in FIG. 2, when the hand switch S1 is switched, the normally closed contact b1 of the hand switch S1 is opened, so that the load 24 becomes inoperative.

On the contrary, when the normally open contact 14a of the control relay 14 is closed from the state shown in FIG. 2, the load 24 is in the non-operating state as described above. When switched, the normally open contact a1 is closed and the normally open contact 22a of the relay 22 is also closed.
Becomes operational.

That is, when the load 24 is in the operating / non-operating state, the output signal of the output port P12 of the CPU 12 is changed or the local switch S
It can be controlled either by switching 1 and the operating / non-operating state of the load 24 can be changed from the current detection circuit 23.
It can be recognized by the load state signal input to the input port P23 of the CPU 12.

The control operation of the remote control device of the present invention will be described below in CP.
This will be described in detail with reference to the flowchart showing the control procedure of U12.

FIG. 3 shows an initialization program. That is, first, when the main power switch (not shown) of the controlled device R1 is turned on, the internal buffer, pointer, etc. of the CPU 12 are initialized, and the initialization of each output port including the output port P12 (load control output port), Further, the self address (SA) is stored by reading the data from the self address switch 13, the initial state of the ports P21 and P22 to which the signal from the local switch S1 is input, the initial state of the port P23 to which the load state signal is input are stored. After storing the state, etc., the timer clock is started in the external interrupt enable state (INTEN) and the standby state is entered.

FIG. 4 is a flow chart showing the control procedure of the CPU 12 when the control command from the central control unit A is received.

The control command from the central control unit A is transmitted on the transmission line l.
It is also input to the external interrupt terminal INT of the CPU 12 via the transmission / reception circuit 11. By the first start bit of the control command input from the central control unit A to this external interrupt terminal INT
When the CPU 12 is interrupted, the CPU 12 first receives a prescribed packet and determines whether or not it is addressed to itself by comparing it with the self-address (SA) stored previously.

If the addresses match, the CPU 12 next checks the prohibition flag INF to confirm whether remote control is possible. This prohibition flag INF is set to "1" when the remote control prohibition switch IS is turned on and the input signal to the input port P24 of the CPU 12 is at low level.

Therefore, since the prohibition flag INF being “0” means that remote control is possible, the CPU 12 executes control of the controlled device R1 according to the control command given from the central control unit A. To do. Specifically, if the command is issued from the central control unit A to bring the load 24 into the non-operating state when the load 24 is in the operating state,
The CPU 12 changes the state of the output signal from the output port P12 (if it is “1” until then, it is set to “0”, and if it is “0” until then, it is set to “1”). If the command from the central control unit A is the same as the state of the load 24 at that time, the CPU 12 ignores the command.

On the other hand, when the prohibition flag INF is “1”, it means that the remote control is prohibited, and thus the CPU 12 ignores the control command received from the control device A.

However, in this case, it is possible that the ON operation of the remote control prohibiting switch IS is due to a previous operation and that it has been forgotten to reset it. Therefore, in this case, the CPU 12 outputs a high level signal from the output port P25 to cause the speaker 16 to ring and issue an alarm. At the same time, the CPU 12 sends a reject signal to the central control unit A to inform the control unit A that remote control is prohibited. As a result, when the remote control cannot be executed, the central control unit A determines that the remote control prohibit switch IS
It is possible to determine whether it is due to the operation of or the failure such as the disconnection of the transmission line l.

Further, the CPU 12 sets the reject flag RJF to "1" and the interval time value n to the interval timer (IT).

The reject flag RJF is set to "1" when the remote control by the central controller A is about to be performed while the remote control is prohibited.

FIG. 5 is a flowchart showing the control related to the operation of the remote control prohibiting switch IS.

This control is a timer interrupt process, and is executed each time a predetermined time has elapsed in the standby state of the flowchart of FIG.

Now, when a timer interrupt occurs, the CPU 12 performs this interrupt processing. That is, it is first checked whether or not the remote control prohibiting switch IS has been switched from off to on. Specifically, the CPU 12 is a remote control prohibit switch if the input signal to the input port P24 changes from high level to low level.
Judge that the IS has been operated from off to on.

In either case, the CPU 12 then selects the reject flag RJF.
Find out. If the reject flag is "1" when the remote control prohibition switch IS is operated from OFF to ON, the remote control from the central control unit A is in the remote control prohibition state (prohibition flag INF = "1"). The signal indicates that the remote control prohibiting switch IS is turned on again after the signal is received and the alarm is issued by the speaker 16.
Therefore, in this case, the remote control prohibition state is maintained,
The process proceeds to the step of checking the terminal status signal input to the input port P23.

On the other hand, if the reject flag RJF = "0", it means that the remote control prohibition switch IS is turned on from the normal state (not the remote control prohibition state) and the remote control prohibition state is instructed. After the flag INF is set to "1", the process proceeds to the step of checking the terminal status signal.

If the remote control prohibition switch IS is not operated from OFF to ON, if the reject flag RJF = "1",
When the remote control signal from the central control unit A is received, the set value n is set in the interval timer (IT), and this is decremented by "1" for each routine of the interrupt processing of the flowchart shown in FIG. If the remote control prohibition switch IS is not turned on by the time the predetermined time corresponding to the set value n elapses, the prohibition flag INF is reset to "0". This is a remote control prohibition switch
This is a measure in preparation for the possibility of forgetting to release the remote control prohibition state by turning on the IS or for unmanned state.

After that, the CPU 12 checks the terminal status signal and, if there is a change, sends the monitor signal to the central control unit A via the transmission line 1.

In the above embodiment, the signal transmission between the central control unit and the interface unit is performed by wire,
Of course, wireless communication or optical communication may be used.

〔The invention's effect〕

As described above, according to the remote control device of the present invention, since it is possible to directly control the remote control of the control target device by the central control device, it is possible to improve safety and operability. Also, if it is forgotten that remote control is prohibited, the remote control prohibition state is automatically canceled according to predetermined conditions, and when the central control unit issues a remote control signal, If the control is prohibited, this is notified to the central control unit, so that the central control unit can determine the reason why the remote control is impossible,
It is easy to find a failure.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of a general remote control device, FIG. 2 is a circuit diagram showing the configuration of an interface unit and controlled equipment of the remote control device of the present invention, FIG.
4 and 5 are flowcharts showing the control procedure. A: Central control unit, B, C, D ... Interface unit, R1, R2, R3 ... Controlled device, S1, S2, S3 ... Hand switch, IS ... Remote control prohibition switch, 12 ... CPU, 16 ...
… Speaker

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Naohio Ohashi 2-18 Keihanhondori, Moriguchi City, Osaka Sanyo Electric Co., Ltd. (72) Osamu Kawakami 2-18th Keihanhondori, Moriguchi City, Osaka Sanyo Within Denki Co., Ltd. (56) Reference JP-A-57-99892 (JP, A) JP-A-58-60894 (JP, A) JP-A-56-96594 (JP, A)

Claims (2)

[Claims] 1. A terminal control device for controlling a controlled device having a hand-operated means for controlling itself, and a central unit for remotely controlling the controlled device by giving a control signal to the terminal control device. A remote control device comprising: a control device; and a switch means for prohibiting remote control of the controlled device by the central control device in the terminal control device, the operation of the switch means provided in the terminal control device. When the control signal is given from the central control device while the remote control of the controlled device is prohibited by the, the alarm means for issuing a predetermined alarm, and the alarm means provided in the terminal control device. Means for canceling the prohibition state of remote control when the switch means is not operated again for a predetermined time after the alarm is issued. And the remote control device. 2. A terminal control device for controlling a control target device having a hand-operated means for controlling itself, and a central unit for remotely controlling the control target device by giving a control signal to the terminal control device. In a remote control device comprising a control device and a switch means for prohibiting remote control of the controlled device by the central control device in the terminal control device, a remote control device provided in the terminal control device and operated by the switch means. A means for transmitting a signal indicating that the remote control is prohibited to the central control device when a control signal is given from the central control device while the remote control of the controlled device is prohibited. A remote control device comprising: