JP5758942B2 - Remote control system, electrical equipment, and controller - Google Patents

Description

  The present invention relates to a technique for remotely controlling an electrical device in a residence.

  In recent years, various techniques for enabling remote control of electric appliances in a house not only from a dedicated remote controller but also from a tablet terminal have been proposed. However, in the case of such remote control, the state of the electric device to be operated and the surrounding situation are often unknown to the user, and thus there is a problem in terms of safety.

  In response to this problem, for example, Patent Document 1 describes a system in which safety is improved during remote operation by limiting each function of an electric device that can be remotely operated from a terminal device.

Japanese Patent Application Laid-Open No. 2006-287739

  By the way, it is conceivable that the remote operation on the electric device is performed by the user not only from outside the house but also from inside the house. In this case, since the user is in a place near the electric device to be operated, remote control can be performed relatively safely. However, since the system described in Patent Document 1 has uniform restrictions on remote control from the terminal device, functions that can be remotely controlled even under the above circumstances are limited. As a result, user convenience is reduced.

The present invention has been made in view of the above circumstances, without compromising safety, highly convenient remote control capable of remote control systems, electric equipment, Contact and aims to provide a controller .

In order to achieve the above object, the remote control system of the present invention provides:
A remote control system for remotely controlling electrical equipment arranged in a residence from a terminal device,
In-home / outside discrimination means for discriminating whether the terminal device is inside or outside the residence when remotely controlling the electrical apparatus from the terminal device;
When it is determined that the out-of-home determination means is outside a residence, an operation restriction means for restricting operations that can be remotely controlled with respect to the electric device;
After the remote control is performed on the electrical equipment from the terminal device that is determined to be outside the house by the inside / outside discrimination means, the terminal device is periodically inquired about maintaining the power-on state, and after the inquiry, the predetermined Control means for controlling the electrical equipment to be in a power-off state when there is no response from the terminal device within a period of time;
It is characterized by providing.

  According to the present invention, convenient remote control is possible without impairing safety.

It is a figure which shows the structure of the remote control system which concerns on embodiment of this invention. It is a block diagram which shows the structure of HGW. It is a block diagram which shows the structure of a terminal device. It is a block diagram which shows the structure of an electric equipment. It is a figure which shows the example of remote operation restriction information. It is a flowchart for demonstrating operation | movement of a remote control process. It is a figure which shows the other example of remote operation restriction information. It is a flowchart for demonstrating operation | movement of the remote control process in another example. It is a flowchart for demonstrating operation | movement of the remote control process in another example. It is a figure which shows the structure of the remote control system provided with the remote control relay.

  Hereinafter, 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.

  FIG. 1 is a diagram showing an overall configuration of a remote control system 1 according to an embodiment of the present invention. The remote control system 1 is a system for a user to remotely control electrical devices in the house 8 by operating the terminal device 3 inside and outside the house. The remote control system 1 includes an HGW 2 (Home Gateway), a terminal device 3, an electric device 4, and a Web server 5.

  The HGW 2 (Home Gateway) is a device for relaying communication between the external network 6 such as the Internet and the home network 7. Moreover, in this embodiment, HGW2 functions also as a controller which manages the electric equipment in a residence. As shown in FIG. 2, the HGW 2 includes an external network communication unit 21, a home network communication unit 22, a data storage unit 23, and a control unit 24.

  The external network communication unit 21 includes a communication interface such as a NIC (Network Interface Card), and performs data communication with the Web server 5 via the external network 6 under the control of the control unit 24. The home network communication unit 22 is an access point for wireless LAN connection, for example, and performs data communication with the electrical device 4 and the terminal device 3 via the home network 7 under the control of the control unit 24.

  The data storage unit 23 plays a role as a so-called secondary storage device (auxiliary storage device), and includes, for example, a readable / writable nonvolatile semiconductor memory or the like such as a flash memory. The data storage unit 23 stores data such as a list of remotely controlled electrical devices 4, a list of operation contents of the electrical devices 4, data indicating an operation state of the electrical devices 4, and the like. The data storage unit 23 also stores various control programs including programs related to remote operation, various tables used when executing the programs, and the like.

  The control unit 24 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), etc. (none of which are shown), and the CPU uses the RAM as a work memory to store ROM and data. The entire HGW 2 is controlled by appropriately executing various programs stored in the unit 23. For example, the control unit 24 realizes a gateway function between the external network 6 and the home network 7.

  Returning to FIG. 1, the terminal device 3 is a mobile terminal such as a smartphone, for example. The terminal device 3 is used inside and outside the residence 8 by the user. As shown in FIG. 3, the terminal device 3 includes an external network communication unit 31, a home network communication unit 32, a position detection unit 33, a display unit 34, an input unit 35, a data storage unit 36, and a control unit. 37.

  The external network communication unit 31 includes, for example, a communication interface for Internet connection and performs data communication with the Web server 5 via the external network 6 under the control of the control unit 37. The home network communication unit 32 includes, for example, an interface for wireless LAN connection conforming to the Wi-Fi (registered trademark) standard, and performs data communication with the HGW 2 via the home network 7 under the control of the control unit 37. Do.

  The position detection unit 33 includes a GPS (Global Positioning System) module and the like, and detects position information (latitude and longitude) of the terminal device 3.

  The display unit 34 includes a liquid crystal panel and the like, and displays a user operation screen and the like for remotely operating the electric device 4 under the control of the control unit 37.

  The input unit 35 includes a touch panel, a touch pad, and the like, and performs processing for receiving an operation input from a user. For example, when a touch panel is adopted as the input unit 35, a transparent flat plate-like capacitance sensor that detects a change in capacitance is mounted on the liquid crystal display. When this capacitive sensor detects contact (press) on the touch surface (for the user, the display screen of the liquid crystal display) with the user's fingertip or a dedicated pen, the position information (coordinate data) is controlled. Is output to the unit 37. The control unit 37 determines the operation content of the user based on the position information. When the user performs an input operation via the input unit 35, a signal corresponding to the operation content is output to the control unit 37.

  The data storage unit 36 plays a role as a so-called secondary storage device (auxiliary storage device), and includes, for example, a readable / writable nonvolatile semiconductor memory or the like such as a flash memory. The data storage unit 36 stores programs executed by the control unit 37 and various data.

  The control unit 37 includes a CPU, a ROM, a RAM, and the like (all not shown), and the CPU uses the RAM as a work memory and appropriately executes various programs stored in the ROM and the data storage unit 36. The entire terminal device 3 is controlled.

  Returning to FIG. 1, the electrical device 4 is a device such as an air conditioner, a lighting device, a rice cooker, an IH cooker, or a dehumidifier used in the house 8, and is connected to a power line 10 that supplies power from a commercial power source 9. Has been. In FIG. 1, only one electric device 4 is shown as a representative, but actually, a plurality of electric devices 4 that can be remotely controlled are arranged in the house 8. As shown in FIG. 4, the electric device 4 has a main function unit (not shown) for realizing the original function of the electric device 4 (for example, an air conditioning function for an air conditioner and an illumination function for a lighting device). In addition, a communication unit 41, a data storage unit 42, and a control unit 43 are provided.

  The communication unit 41 is, for example, a communication adapter for connecting to the home network 7 and performs data communication with the HGW 2 via the home network 7 under the control of the control unit 43. In addition, you may comprise the communication part 41 with the external communication adapter which can be attached or detached.

  The data storage unit 42 plays a role as a so-called secondary storage device (auxiliary storage device), and includes, for example, a readable / writable nonvolatile semiconductor memory or the like such as a flash memory. The data storage unit 42 stores programs executed by the control unit 43 and various data. Further, the data storage unit 42 stores remote operation restriction information 421 in which restriction contents for remote operation instructed from the terminal device 3 outside the residence are defined.

  Here, FIG. 5 conceptually shows an example of the remote operation restriction information 421 when the electric device 4 is an air conditioner. In this example, the remote operation restriction information 421 is configured to include an operable flag that indicates whether the operation can be performed remotely from outside the house 8 for each operation of the air conditioner.

  In FIG. 5, the operation “change set temperature (within assumed range)” indicates an operation to change the set temperature of the air conditioner within the assumed range, and such an operation is performed remotely from the operable flag. Shall be permitted. In addition, what is necessary is just to obtain | require the assumption range of preset temperature from the range of preset temperature set to the air conditioner in the last one week, for example. Specifically, the set temperature is assumed to be a range in which the value obtained by subtracting 3 ° C from the lowest set temperature in the last one week is the lower limit and the value obtained by adding 3 ° C from the highest set temperature is the upper limit. A range may be used. Or you may estimate the assumption range of preset temperature in the range considered appropriate from the temperature in a house, and it is good also as a preset range according to a date and every season.

  Returning to FIG. 4, the control unit 43 includes a CPU, a RAM, a ROM, and the like, and controls each unit described above. Functionally, the control unit 43 includes an in-home / outside determination unit 431, an operation restriction unit 432, and a control execution unit 433. The functions of these components are realized by the CPU appropriately executing various programs stored in the ROM and the data storage unit 42 using the RAM as a work memory.

  When receiving a control signal for controlling the electric device 4 from the terminal device 3, the in-home / outside determination unit 431 determines whether the terminal device 3 is inside or outside the residence 8.

  The operation restriction unit 432 performs processing for restricting operations that can be remotely controlled with respect to the electric device 4 when the inside / outside discrimination unit 431 determines that the terminal device 3 is outside the residence 8. Specifically, when the operation restriction unit 432 determines that the terminal device 3 is outside the residence 8, the operation restriction unit 432 refers to the remote operation restriction information 421 and determines whether or not the operation indicated by the received control signal is appropriate. Determine. When it is determined that the operation is not appropriate, the operation restriction unit 432 transmits data indicating that (control disapproval data) to the terminal device 3.

  When the control execution unit 433 determines that the inside / outside determination unit 431 determines that the terminal device 3 is in the residence 8 or the operation restriction unit 432 determines that the control is appropriate, the received control signal is The main function unit (not shown) is caused to execute the control shown.

  Returning to FIG. 1, the Web server 5 is a server connected to the HGW 2 and the terminal device 3 via an external network 6 such as the Internet. The Web server 5 stores various types of information (for example, a registered user name, a registered password, identification information of the terminal device 3, identification information of the HGW 2) for identifying a contracted user. In addition, the Web server 5 acquires, accumulates, and stores various data regarding the environment in the residence 8 and the electrical device 4 via the HGW 2. The terminal device 3 can access the Web server 5 via the external network 6 and refer to these pieces of information. Further, the Web server 5 transmits remote operation instruction data (details will be described later) received from the terminal device 3 to the HGW 2.

  Subsequently, in the remote control system 1 configured as described above, an operation of a process (remote control process) of remotely controlling the electric device 4 from the terminal device 3 inside and outside the residence 8 will be described with reference to a flowchart of FIG. .

  The user operates the input unit 35 of the terminal device 3 from inside and outside the residence 8 to specify the electric device 4 to be operated and the operation content for the electric device 4 and instruct remote operation. In response to this instruction, the control unit 37 of the terminal device 3 receives remote operation instruction data including information (for example, an apparatus ID) indicating the designated electric device 4 to be operated and the designated operation content. Generate (step S101).

  Subsequently, the control unit 37 transmits the generated remote operation instruction data and the current position information detected by the position detection unit 33 to the HGW 2 (step S102). Specifically, the control unit 37 first determines whether or not the home network communication unit 32 is connectable to the home network 7. If connection is possible, the control unit 37 controls the home network communication unit 32 and transmits remote operation instruction data and position information to the HGW 2 via the home network 7. On the other hand, when the connection to the home network 7 cannot be established, the control unit 37 controls the external network communication unit 31 to transmit the remote operation instruction data and the position information to the Web server 5 via the external network 6. Transmits these pieces of information to the HGW 2.

  When receiving the remote operation instruction data and the position information, the control unit 24 of the HGW 2 generates a control signal for controlling the electric device 4 to be operated based on the operation content indicated by the received remote operation instruction data. (Step S103), together with the received position information, is transmitted to the electric device 4 to be operated (Step S104).

  When the control signal and the position information are received, the inside / outside determination unit 431 of the electric device 4 determines whether the terminal device 3 instructing the remote operation is inside or outside the residence 8 based on the position information (step) S105). For example, the inside / outside discrimination unit 431 compares the position indicated by the received position information with the position of the house 8 registered in advance, and if the distance between the two positions is within a predetermined range (for example, within 20 m). What is necessary is just to discriminate | determine that the terminal device 3 exists in the residence 8. FIG.

  When it is determined that it is in the house 8 (step S105; in the house), the control execution unit 433 causes the main function unit (not shown) of the electric device 4 to execute processing according to the received control signal (step S106).

  On the other hand, when it is determined that the user is outside the residence 8 (step S105; outside the residence), the operation restriction unit 432 refers to the remote operation restriction information 421 and determines whether or not the operation indicated by the received control signal is appropriate. Determination is made (step S107).

  For example, in the case of the remote operation restriction information 421 as shown in FIG. 5, if the received control signal is an instruction to turn on the electric device 4, the operation restriction unit 432 determines that the operation is not appropriate. To do. When the received control signal is an instruction to turn off the power of the electrical device 4, the operation restriction unit 432 determines that the operation is appropriate.

  Returning to FIG. 6, when it is determined that the control is not appropriate (step S107; No), the control execution unit 433 transmits data indicating that (control disapproval data) to the HGW 2 (step S108), and controls the HWG 2 The unit 24 transmits the received control non-permission data to the terminal device 3 (step S109). The control unit 37 of the terminal device 3 that has received the operation disapproval data displays an error message or the like on the display unit 34 to notify the user that the desired remote operation cannot be performed on the designated electrical device 4. (Step S110).

  On the other hand, when it is determined that the control is appropriate (step S107; Yes), the control execution unit 433 causes the main function unit to execute processing according to the received control signal (step S106).

  As described above, according to the remote control system 1 according to the embodiment of the present invention, when the electric device 4 in the residence 8 is remotely operated from the terminal device 3, the terminal device 3 is inside or outside the residence 8. Is determined. When it is determined that the user is outside the residence 8, operations that can be remotely controlled are restricted, whereas when it is determined that the user is inside the residence 8, such a restriction is not imposed. Therefore, convenient remote control is possible without impairing safety.

  In addition, this invention is not limited to the said embodiment, Of course, the various correction in the part which does not deviate from the summary of this invention is possible.

  For example, in the above embodiment, when a remote operation instruction is given from the terminal device 3 in the residence 8, the remote control is executed without any particular limitation. However, as shown in FIG. 7, the remote control restriction information 421 further including an operable flag (for in-house use) indicating whether or not the remote operation can be performed from the terminal device 3 in the residence 8 is stored in the data storage unit. 42, the remote operation may be restricted by determining whether or not the remote operation instruction from the terminal device 3 in the residence 8 is appropriate. For example, in this example, the operation to turn on the power is not remotely controlled even if it is an instruction from the terminal device 3 in the residence 8. By doing in this way, it becomes possible to improve safety more.

  Moreover, in the said embodiment, the electrical equipment 4 discriminate | determined whether the terminal device 3 which instruct | indicated self remote operation was in the inside or outside of the residence 8 (inside / outside discrimination | determination), and determined the suitability of operation. However, other devices constituting the remote control system 1 may perform this in-home / outside discrimination. For example, the remote control process when the HGW 2 performs the inside / outside discrimination will be described with reference to the flowchart of FIG. The description of the same processing as that in the flowchart shown in FIG. 6 will be simplified as appropriate. In this case, the HGW 2 stores the remote operation restriction information 421 of each electric device 4 in the data storage unit 23.

  First, in response to an operation from the user via the input unit 35, the terminal device 3 generates remote operation instruction data (step S201), and transmits the remote operation instruction data and position information to the HGW 2 (step S201). S202).

  When receiving the remote operation instruction data and the position information, the control unit 24 of the HGW 2 determines whether the terminal device 3 that has instructed the remote operation is inside or outside the residence 8 based on the position information (step S203). .

  When it is determined that the user is outside the residence 8 (step S203; outside the residence), the control unit 24 refers to the remote operation restriction information 421 of the electrical device 4 to be operated, and the operation indicated by the received control signal is appropriate. Is determined (step S204).

  When it is determined that the control is not appropriate (step S204; No), the control unit 24 transmits data indicating that fact (control non-permission data) to the terminal device 3 (step S205), and the control unit 37 of the terminal device 3 Displays a message indicating that it cannot be operated on the display unit 34 (step S206).

  When it is determined that the terminal device 3 is in the residence 8 (step S203; in the residence), or when it is determined that the control is appropriate (step S204; Yes), the control unit 24 of the HGW 2 A control signal for controlling the electrical device 4 is generated and transmitted to the electrical device 4 (step S207). The control unit 43 of the electric device 4 executes processing based on the received control signal (step S208), and the remote control processing ends.

  Next, remote control processing when the terminal device 3 determines whether or not remote operation is appropriate will be described with reference to the flowchart of FIG. In this case, the terminal device 3 stores the remote operation restriction information 421 of each electrical device 4 and the location information of the residence 8 where these electrical devices 4 are arranged in the data storage unit 36.

  When receiving a remote operation instruction from the user via the input unit 35, the control unit 37 of the terminal device 3 compares the position information detected by the position detection unit 33 with the position information of the residence 8, It is determined whether the house 8 is inside or outside the house 8 (step S301).

  When it is determined that the user is outside the residence 8 (step S301; outside the residence), the control unit 37 refers to the remote operation restriction information 421 of the electrical device 4 to be operated, and the operation indicated by the received control signal is appropriate. Whether or not (step S302).

  When it is determined that the control is not appropriate (step S302; No), the control unit 37 displays a message indicating that on the display unit 34 (step S303).

  Further, when it is determined that it is in the house 8 (step S301; in the house), or when it is determined that the control is appropriate (step S302; Yes), the control unit 37 generates remote operation instruction data. Are transmitted to the HGW 2 (step S304). The control unit 24 of the HGW 2 generates a control signal from the received remote operation data and transmits it to the electric device 4 to be operated (step S305). The control execution unit 433 of the electrical device 4 causes the main function unit to execute the received control signal (step S306), and the remote control process ends.

  As described above, in this example, the terminal device 3 that has received the remote operation instruction makes a discrimination between inside and outside the house, and if the terminal device 3 is outside the residence 8, the remote operation is restricted and remote operation instruction data for inappropriate remote operation is not transmitted. . Therefore, it is possible to reduce the communication load as compared with the case where the electric device 4 or the HGW 2 makes the home / outside discrimination (FIGS. 6 and 8).

  Moreover, in the said embodiment, although it was discriminate | determined based on the positional information on the terminal device 3 whether the terminal device 3 exists in the inside and outside of the residence 8, you may discriminate | determine inside and outside the residence 8 by another method. For example, the determination may be performed based on a data communication path during remote operation. Specifically, when receiving the remote operation instruction data from the terminal device 3, the control unit 24 of the HGW 2 analyzes the communication path of the remote operation instruction data. Then, when the analyzed communication path indicates that it passes through the external network 6, the control unit 24 determines that the terminal device 3 is outside the residence 8. Further, when the analyzed communication path indicates that it passes through the home network 7, the control unit 24 may determine that the terminal device 3 is in the residence 8.

  Alternatively, when the remote control can be performed by directly transmitting a control signal from the terminal device 3 to the electric device 4 by ad hoc communication without going through the home network 7, the control unit 43 of the electric device 4 can perform the ad hoc communication from the terminal device 3. When the control signal is received, it may be determined that the terminal device 3 is in the residence 8.

  Whether the control unit 43 of the electric device 4 maintains the power ON state periodically (for example, every 30 minutes) after being remotely controlled other than the power OFF from the terminal device 3 outside the residence 8. To the user of the terminal device 3. And when there is no response from the terminal device 3 (user) within a predetermined time after making the inquiry, the control unit 43 may turn off its own power supply. As described above, in remote control from outside the house, confirmation by the user is required periodically, so that safety can be further improved. Note that the above inquiry processing may be performed by the control unit 24 of the HGW 2 that is a controller, instead of the control unit 43 of the electrical device 4.

Further, as shown in FIG. 10, a remote control relay 11 is arranged on a power line 10 that supplies electric power to the electric device 4, and the electric device 4 and the remote control relay 11 are connected to be communicable by wire or wirelessly. The remote control relay 11 includes a contact and an excitation coil, and the drive power is supplied to the excitation coil from a step-down transformer (not shown), so that the opening / closing state of its own contact can be changed. The supply of the commercial power supply 9 can be turned on and off. And the control part 43 of the electric equipment 4 discriminate | determines abnormality of the electric equipment 4 regularly from an operation state, an electric current waveform, etc., and when the abnormality is detected, it controls the contact in the remote control relay 11 to be opened. The supply of the commercial power supply 9 may be cut off. By doing in this way, when the electric device 4 is abnormal, it becomes impossible to remotely control the electric device 4, so that it is possible to further improve safety.
Note that the control unit 43 of the electrical device 4 may be configured as an adapter device that is serially connected to the electrical device 4. In this case, when an error occurs more than a predetermined frequency in serial communication with the connected electrical device 4 or communication cannot be performed for a predetermined time or longer, the adapter device controls the contact in the remote control relay 11 to be opened, The supply of the power source 9 may be cut off.

  In addition, for example, by applying an operation program that defines the operation of the HGW 2 and the terminal device 3 according to the present invention to an existing personal computer, information terminal device, and the like, the personal computer or the like is connected to the HGW 2 and the terminal device 3 according to the present invention. It is also possible to function as.

  Further, the distribution method of such a program is arbitrary. For example, the program can be read by a computer such as a CD-ROM (Compact Disk Read-Only Memory), a DVD (Digital Versatile Disk), an MO (Magneto Optical Disk), or a memory card. It may be distributed by storing in a recording medium, or distributed via a communication network such as the Internet.

DESCRIPTION OF SYMBOLS 1 Remote control system, 2 HGW, 3 Terminal device, 4 Electric equipment, 5 Web server, 6 External network, 7 Home network, 8 Housing, 9 Commercial power supply, 10 Power line, 11 Remote control relay, 21, 31 External network communication part, 22, 32 Home network communication unit, 23, 36, 42 Data storage unit, 24, 37, 43 Control unit, 33
Position detection unit, 34 display unit, 35 input unit, 41 communication unit, 421 remote operation restriction information, 431 in-home / outside discrimination unit, 432 operation restriction unit, 433 control execution unit

Claims (6)

A remote control system for remotely controlling electrical equipment arranged in a residence from a terminal device,
In-home / outside discrimination means for discriminating whether the terminal device is inside or outside the residence when remotely controlling the electrical apparatus from the terminal device;
When it is determined that the out-of-home determination means is outside a residence, an operation restriction means for restricting operations that can be remotely controlled with respect to the electric device;
After the remote control is performed on the electrical equipment from the terminal device that is determined to be outside the house by the inside / outside discrimination means, the terminal device is periodically inquired about maintaining the power-on state, and after the inquiry, the predetermined Control means for controlling the electrical equipment to be in a power-off state when there is no response from the terminal device within a period of time;
A remote control system comprising: The operation restriction means includes
When it is determined that the inside / outside determination means is outside the house, the appropriateness of the remote control is determined based on a predetermined standard, and when it is determined to be appropriate, the electric device is remotely controlled, If it is determined that there is not, do not remotely control the electrical equipment,
The remote control system according to claim 1. The inside / outside discrimination means discriminates whether the terminal device is inside or outside the residence based on position information of the terminal device .
The remote control system according to claim 1 or 2, characterized by the above. The inside / outside discrimination means discriminates whether the terminal device is inside or outside the residence based on a communication path of data transmitted from the terminal device when performing remote control.
The remote control system according to claim 1 or 2, characterized by the above. An electrical device arranged in a residence and connected to a terminal device via a network,
In-home / outside discrimination means for discriminating whether the terminal device is inside or outside the residence when instructed by the terminal device to be remotely controlled;
When it is determined that the inside / outside discrimination means is outside the residence, an operation restriction means for restricting operations that can be remotely controlled;
After the remote control of the terminal device determined that the inside / outside determination means is outside the house, the terminal device is periodically inquired about maintaining the power ON state, and within a predetermined time after the inquiry Control means for controlling itself to a power OFF state when there is no response from the terminal device;
An electrical apparatus comprising: A controller connected via a network to a terminal device and electrical equipment arranged in a house,
In-home / outside discrimination means for discriminating whether the terminal device is inside or outside the residence when instructed to remotely control the electrical device from the terminal device;
When it is determined that the out-of-home determination means is outside a residence, an operation restriction means for restricting operations that can be remotely controlled with respect to the electric device;
After the remote control is performed on the electrical equipment from the terminal device that is determined to be outside the house by the inside / outside discrimination means, the terminal device is periodically inquired about maintaining the power-on state, and after the inquiry, the predetermined Control means for controlling the electrical equipment to be in a power-off state when there is no response from the terminal device within a period of time;
A controller comprising:

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