JP5154668B2 - Network system, presence / absence determination method, and controller - Google Patents

Description

  The present invention relates to a network system, a presence / absence determination method, and a controller technology for determining whether a person is present in a room by using a human sensor.

  A human sensor for detecting whether or not a person is present in a room such as a house or an office is known. A technique of using a human sensor as a switch of another device is also known.

  For example, Japanese Unexamined Patent Application Publication No. 2007-227330 (Patent Document 1) discloses a ceiling-mounted lighting fixture with a human sensor. According to Japanese Patent Laying-Open No. 2007-227330 (Patent Document 1), in the lighting operation switching mode of the direct lighting fixture, a human sensor standby mode is further provided in addition to the normal security light mode that always lights. The human sensor standby mode is provided with a fade-out function in which, after the sensing is completed, the safety light is turned on for several tens of seconds by the delay circuit, and then gradually becomes dark and turns off. The human sensor part is provided to be exposed in a direction away from the center of the luminaire main body at the peripheral edge of the luminaire main body.

  Japanese Patent Laying-Open No. 2009-108488 (Patent Document 2) discloses a gate post and a door approach structure. According to Japanese Patent Laying-Open No. 2009-108488 (Patent Document 2), the structure includes a front plate member on the outside of the site, a back plate member on the building side, and a gate pole device provided between the front plate member and the back plate member. . This gate post device includes a human sensor and main body lighting that is turned on when the human sensor detects heat generated by the human body or the like. The detection area of the human sensor is within a range between an extension line between the side edges of the human sensor and the front plate member and an extension line between the side ends of the human sensor and the rear plate member. Thereby, only those who approach from the side of a front board material and a back board material can be sensed, without detecting those who approach a front board material and a back board material from the front.

  Japanese Unexamined Patent Application Publication No. 2005-222726 (Patent Document 3) discloses an illumination system and an illumination technique. According to Japanese Patent Laying-Open No. 2005-222726 (Patent Document 3), a lighting system includes a human sensor that detects a presence or absence of a person in a detection area as a predetermined detection area, and is adjacent to the road. And a lighting fixture that operates when a human sensor detects the presence of a person. The luminaire is installed such that a change in operation can be recognized by a person in the detection area and at least a part of the irradiation range of the luminaire is a blind spot as seen from the person in the detection area.

JP 2007-227330 A JP 2009-108488 A JP 2005-222726 A

  However, the human sensor may not be able to detect a person who has been stopped for a predetermined time or more. In other words, when determining whether there is a person in the room, if the person in the room has been stopped for a predetermined time or more, there is no person in the room even if the human sensor is used. There is a risk of being judged.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a network system, a presence / absence determination method, and a controller that can more accurately determine whether or not there is a person in a room. It is to provide.

According to one aspect of the present invention, a first human sensor for sensing an area near the entrance of the room, and a second human sensor for sensing an area inside the room relative to the area near the entrance A network system comprising a controller is provided. The controller receives first information indicating a sensing result from the first human sensor, and receives a second information indicating the sensing result from the second human sensor, and a first communication interface; And a processor for determining whether or not there is a person in the room based on the second information. When the first or second human sensor detects a person, the processor determines that there is a person in the room, and the second human sensor does not detect the person while the first human sensor detects the person. After the state, if the first and second human sensors do not detect a person, it is determined that there is no person in the room.

  Preferably, the sensing area of the first human sensor and the sensing area of the second human sensor do not overlap.

  Preferably, the network system further includes lighting arranged in the room. The communication interface can communicate with the lighting. The processor turns on the illumination via the communication interface when it is determined that there is a person in the room, and turns off the illumination via the communication interface when it is determined that there is no person in the room.

According to another aspect of the present invention, a first human sensor for sensing an area near the entrance of the room and a second human sensor for sensing an area inside the room with respect to the area near the entrance A presence / absence determination method in a network system including a controller is provided. In the presence / absence determination method, the controller receives the first information indicating the sensing result from the first human sensor, and the controller includes the second information indicating the sensing result from the second human sensor. And a step of the controller determining whether or not there is a person in the room based on the first and second information. In the determining step, when the first or second human sensor detects a person, it is determined that there is a person in the room, and the second human sensor detects the person while the first human sensor detects the person. This includes determining that there is no person in the room if the first and second human sensors do not detect a person after passing through the non-detecting state.

A controller according to another aspect of the present invention receives first information indicating a sensing result from a first human sensor for sensing an area in the vicinity of the entrance of the room, and is located inside the room from the area in the vicinity of the entrance. Whether there is a person in the room based on the communication interface for receiving the second information indicating the sensing result from the second human sensor for sensing the area and the first and second information And a processor for determining . When the first or second human sensor detects a person, the processor determines that there is a person in the room, and the second human sensor does not detect the person while the first human sensor detects the person. After the state, if the first and second human sensors do not detect a person, it is determined that there is no person in the room.

According to another aspect of the present invention, a first human sensor for sensing an area near the entrance of the room, and a second human sensor for sensing an area inside the room from the area near the entrance, A presence / absence determination method in a controller including a communication interface for communicating and a processor is provided. In the presence / absence determination method, the processor receives the first information indicating the sensing result from the first human sensor via the communication interface, and the processor receives the second person via the communication interface. Receiving second information indicating a sensing result from the sense sensor, and a processor determining whether or not there is a person in the room based on the first and second information. In the determining step, when the first or second human sensor detects a person, it is determined that there is a person in the room, and the second human sensor detects the person while the first human sensor detects the person. This includes determining that there is no person in the room if the first and second human sensors do not detect a person after passing through the non-detecting state.

  As described above, the present invention provides a network system, a presence / absence determination method, and a controller that can more accurately determine whether or not there is a person in a room.

It is an image figure which shows the whole structure of the network system 1 which concerns on this Embodiment. It is a block diagram showing the hardware constitutions of the controller 100 which concerns on this Embodiment. It is an image figure which shows the sensor table 101A which concerns on this Embodiment. It is a flowchart which shows the process sequence by CPU110 of the controller 100 concerning this Embodiment. It is a flowchart which shows the modification of the process sequence by CPU110 of the controller 100 which concerns on this Embodiment. It is an image figure which shows the whole structure of the network system 1 which concerns on this modification.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same parts are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

<Overall configuration of network system 1>
First, the overall configuration of the network system according to the present embodiment will be described. FIG. 1 is an image diagram showing an overall configuration of a network system 1 according to the present embodiment.

  Referring to FIG. 1, network system 1 according to the present embodiment includes human sensor 200 </ b> A arranged on the ceiling near the entrance (door) of room 401 and a person installed on the center ceiling of room 401. And a sensor 200B. For example, the human sensors 200 </ b> A and 200 </ b> B detect a moving heat source.

  The human sensor 200 </ b> A detects a person at the entrance of the room 401. The human sensor 200 </ b> B detects a person inside the room 401. It is preferable that the sensing area 201A of the human sensor 200A and the sensing area 201B of the human sensor 200B do not overlap.

  The network system 1 includes lightings 301A and 301B, an air conditioner 302, and a television 303. The network system 1 may include home appliances other than the lightings 301 </ b> A and 301 </ b> B, the air conditioner 302, and the television 303.

  The network system 1 includes a controller 100 for controlling human sensors 200A and 200B, lights 301A and 301B, an air conditioner 302, and a television 303. In other words, the controller 100 can perform data communication with the human sensors 200A and 200B, the lights 301A and 301B, the air conditioner 302, the television 303, and the like via a wired or wireless network.

  The controller 100 uses, for example, a wireless LAN, ZigBee (registered trademark), Bluetooth (registered trademark), wired LAN (Local Area Network), or PLC (Power Line Communications) as a network. The controller 100 may be portable, may be detachable from a base placed on a table, or may be fixed to a wall of a room.

<Operation overview of network system 1>
Next, an outline of the operation of the network system 1 (particularly the controller 100) according to the present embodiment will be described.

  Referring to FIG. 1, controller 100 according to the present embodiment provides information indicating that a person has been detected or information indicating that a person has not been detected from human sensors 200A and 200B via a network. Etc.

  Based on information from human sensor 200B, controller 100 determines that there is a person in room 401 when human sensor 200B detects the person. Alternatively, controller 100 may determine that there is a person in room 401 when at least one of human sensor 200A and human sensor 200B detects a person based on information from human sensor 200A. .

  Here, there are cases where the human sensor 200B does not detect a person even though there is a person in the room 401. For example, when a person in the room 401 stops moving, the human sensor 200B may not detect the person.

  Therefore, after the controller 100 according to the present embodiment determines that there is a person in the room 401, the human sensor 200B does not detect a person and the human sensor 200A detects a person. It is determined that there is no person in room 401 (no person has left room 401). Thereafter, the controller 100 determines that there is no person in the room 401 until the human sensor 200A detects the person.

  Alternatively, after the controller 100 determines that there is a person in the room 401, after the human sensor 200B has not detected the person and the human sensor 200A has detected the person, the human sensor 200A. , 200B does not detect any person, it is determined that there is no person in the room 401 (no person has left the room 401). After that, the controller 100 determines that there is no person in the room 401 until at least one of the human sensor 200A and the human sensor 200B detects the person.

  When the controller 100 determines that there is a person in the room 401, the controller 100 turns on the lights 301A and 301B, the air conditioner 302, or the television 303. When the controller 100 determines that there is no person in the room 401, the controller 100 turns off the lights 301A and 301B, the air conditioner 302, or the television 303. However, the controller 100 may control operations of home appliances other than the lightings 301 </ b> A and 301 </ b> B, the air conditioner 302, and the television 303 based on the above determination result.

  As described above, the network system 1 according to the present embodiment senses the detection result of the human sensor 200A for sensing the area at the entrance of the room 401 and the area for sensing the area inside the room 401 from the entrance. Since it is determined whether there is a person in the room 401 based on the human sensor 200B and the detection result, it is possible to more accurately determine whether there is a person in the room.

  Hereinafter, a specific configuration of the network system 1 for realizing such a function will be described in detail.

<Hardware configuration of controller 100>
One aspect of the hardware configuration of the controller 100 according to the present embodiment will be described. FIG. 2 is a block diagram showing a hardware configuration of controller 100 according to the present embodiment.

  The controller 100 includes a memory 101, a display 102, a tablet 103, a button 104, a communication interface 105, a speaker 107, a clock 108, and a CPU (Central Processing Unit) 110.

  The memory 101 is realized by various types of RAM (Random Access Memory), ROM (Read-Only Memory), a hard disk, and the like. For example, the memory 101 is a USB (Universal Serial Bus) memory, a CD-ROM (Compact Disc-Read Only Memory), a DVD-ROM (Digital Versatile Disk-Read Only Memory), which is used via a reading interface. Memory card, FD (Flexible Disk), hard disk, magnetic tape, cassette tape, MO (Magnetic Optical Disc), MD (Mini Disc), IC (Integrated Circuit) card (excluding memory card), optical card, mask ROM, EPROM It is also realized by a medium for storing a program in a nonvolatile manner such as an EEPROM (Electronically Erasable Programmable Read-Only Memory).

  The memory 101 stores a control program executed by the CPU 110 and a sensor table 101A.

  FIG. 3 is an image diagram showing a sensor table 101A according to the present embodiment. Referring to FIG. 3, sensor table 101A includes, for each room, a room ID, a room name, a human sensor ID for sensing the entrance of the room, a detection result of the human sensor, The ID of the human sensor for sensing the inside of the room and the detection result of the human sensor are stored.

  Note that the sensor table 101A preferably stores a home appliance ID for specifying a home appliance arranged for each room in association with the room ID of the room. CPU 110 controls home appliances (lights 301A and 301B, air conditioner 302, television 303, etc.) corresponding to room 401 based on whether or not there is a person in room 401 by referring to sensor table 101A.

  Returning to FIG. 2, the display 102 displays the operating states of the human sensors 200 </ b> A and 200 </ b> B, the lights 301 </ b> A and 301 </ b> B, the air conditioner 302, and the television 303 under the control of the CPU 110. The tablet 103 detects a touch operation with a user's finger and inputs touch coordinates or the like to the CPU 110. The CPU 110 receives a command from the user via the tablet 103.

  In the present embodiment, a tablet 103 is laid on the surface of the display 102. That is, in the present embodiment, display 102 and tablet 103 constitute touch panel 106. However, the controller 100 may not have the tablet 103.

  The button 104 is disposed on the surface of the controller 100. A plurality of buttons such as a determination key, a direction key, and a numeric keypad may be arranged on the controller 100. The button 104 receives a command from the user. The button 104 inputs a command from the user to the CPU 110.

  The communication interface 105 is controlled by the CPU 110 to transmit / receive data to / from the lightings 301A and 301B, the air conditioner 302, the television 303, and other home appliances via the network. CPU 110 also transmits / receives data to / from human sensors 200A and 200B using communication interface 105. As described above, the communication interface 105 uses, for example, a wireless LAN, ZigBee (registered trademark), Bluetooth (registered trademark), wired LAN, or PLC to illuminate 301A and 301B, the air conditioner 302, and the television. 303 and data are transmitted / received with other household appliances.

  The speaker 107 outputs sound based on a command from the CPU 110. For example, the CPU 110 causes the speaker 107 to output sound based on the sound data.

  The clock 108 inputs the current date and time to the CPU 110 based on a command from the CPU 110.

  The CPU 110 executes various information stored as shown in FIG. 4 or 5 by executing various programs stored in the memory 101. In other words, the processing in the controller 100 is realized by each hardware and software executed by the CPU 110. Such software may be stored in the memory 101 in advance. The software may be stored in a storage medium and distributed as a program product. Alternatively, the software may be provided as a program product that can be downloaded by an information provider connected to the so-called Internet.

  Such software is read from the storage medium by using a reading device (not shown), or downloaded by using the communication interface 105 and temporarily stored in the memory 101. The CPU 110 stores the software in the form of an executable program in the memory 101 and then executes the program.

  As storage media, CD-ROM (Compact Disc-Read Only Memory), DVD-ROM (Digital Versatile Disk-Read Only Memory), USB (Universal Serial Bus) memory, memory card, FD (Flexible Disk), hard disk , Magnetic tape, cassette tape, MO (Magnetic Optical Disc), MD (Mini Disc), IC (Integrated Circuit) card (excluding memory card), optical card, mask ROM, EPROM, EEPROM (Electronically Erasable Programmable Read-Only Memory) And the like, for example, a medium for storing the program in a nonvolatile manner.

  The program here includes not only a program directly executable by the CPU but also a program in a source program format, a compressed program, an encrypted program, and the like.

  More specifically, CPU 110 according to the present embodiment provides information indicating that a person has been detected or information indicating that a person has not been detected from human sensors 200A and 200B via communication interface 105. Receive.

  Based on the information from the human sensor 200B, the CPU 110 determines that there is a person in the room 401 when the human sensor 200B detects the person. After CPU 110 determines that there is a person in room 401, when human sensor 200B detects no person and human sensor 200A detects a person, there is no person in room 401 (room 401). It is judged that there are no more people.

  Alternatively, CPU 110 determines that there is a person in room 401 when at least one of human sensor 200A and human sensor 200B detects a person based on information from human sensor 200A and human sensor 200B. To do. In this case, after determining that there is a person in the room 401, the CPU 110 passes through a state in which the human sensor 200B has not detected a person and the human sensor 200A has detected a person. When the human sensors 200A and 200B do not detect any person (without the person 200A detecting the person and the human sensor 200B detecting the person), there is no person in the room 401 (the room It is determined that there is no person from 401).

  When the CPU 110 determines that there is a person in the room 401 (when a transition is made from a state where there is no person to a state where there is a person), the lighting 301A, 301B, the air conditioner 302, the television 303, or the A command to turn on the power or a command to increase the strength is transmitted to other home appliances.

  On the other hand, when the CPU 110 determines that there is no person in the room 401 (when a transition is made from a person having no person) to the lighting 301A, 301B, the air conditioner 302, the television 303, or other household appliances, Sends a power-off command, a command to weaken the strength, etc.

<Information Processing in Controller 100>
Next, information processing in the controller 100 according to the present embodiment will be described. FIG. 4 is a flowchart showing a processing procedure performed by CPU 110 of controller 100 according to the present embodiment.

  Referring to FIG. 4, CPU 110 waits for data from human sensors 200 </ b> A and 200 </ b> B in each of a plurality of rooms via communication interface 105. Alternatively, the CPU 110 requests detection results from the human sensors 200A and 200B in each of the plurality of rooms via the communication interface 105. Hereinafter, processing executed by the CPU 110 with respect to one room 401 among a plurality of rooms will be described. The CPU 110 executes the following processing in parallel for each of the plurality of rooms or for each of the plurality of rooms.

  CPU 110 determines whether or not human sensor 200B has detected a person based on data from human sensor 200B (step S102). CPU110 repeats the process from step S102, when human sensor 200B has not detected the person (when it is NO in step S102).

  When the human sensor 200B detects a person (YES in step S102), the CPU 110 determines that there is a person in the room 401 corresponding to the human sensor 200B (step S104). The CPU 110 transmits a power-on command, a command for increasing the strength, and the like to the home appliances disposed in the room 401 where the human sensor 200B is disposed via the communication interface 105 (step S106).

  Based on the data from human sensor 200A, CPU 110 determines whether human sensor 200A has detected a person (step S108). CPU110 repeats the process from step S102, when human sensor 200A detects a person (when it is YES in step S108).

  CPU 110 recognizes that human sensor 200A has not detected a person, that is, human sensor 200A has not detected a person and human sensor 200B has detected a person (NO in step S108). If it is, it is determined whether or not the human sensor 200B has detected a person (step S110). CPU110 repeats the process from step S110, when human sensor 200B detects a person (when it is YES in step S110).

  CPU 110 determines whether or not human sensor 200A has detected a person when human sensor 200B has not detected a person (NO in step S110) (step S112). CPU110 repeats the process from step S110, when human sensor 200A does not detect a person (when it is NO in step S112).

  When CPU 110A detects a person, that is, when human sensor 200A detects a person and recognizes that human sensor 200B does not detect the person (YES in step S112). It is determined that there is no person in the room 401 (step S114). CPU 110 transmits a power-off command, a command to reduce the strength, and the like to home appliances arranged in room 401 where human sensor 200B is arranged via communication interface 105 (step S116).

  In the present embodiment, CPU 110 determines whether or not a person has completely entered room 401 by executing the process of step S108. However, if the sensing area 201A of the human sensor 200A and the sensing area 201B of the human sensor 200 do not overlap, the process of step S108 may not be executed.

<Modification of Information Processing in Controller 100>
Next, a modified example of information processing in the controller 100 will be described. In the above embodiment, it is assumed that there is a person in the room 401 when there is a person in the sensing area of the human sensor 200B, and there is no person in the room 401 when there is no person in the sensing area of the human sensor 200B. It was judged. On the other hand, in this modification, it is assumed that there is a person in the room 401 when a person is in the sensing area of the human sensor 200A and the human sensor 200B, and a person is present in the sensing area of the human sensor 200A and the human sensor 200B. When there is no person, it is determined that there is no person in the room 401.

  FIG. 5 is a flowchart showing a modification of the processing procedure performed by CPU 110 of controller 100 according to the present embodiment. The same steps as those shown in FIG. 4 are denoted by the same step numbers, and description thereof will not be repeated.

  Referring to FIG. 5, after step S112, CPU 110 may determine again whether human sensor 200A has detected a person (step S113). In this case, CPU 110 repeats the processing from step S110 when human sensor 200A detects a person (YES in step S113).

  Then, CPU 110 does not detect a person when human sensor 200A does not detect a person (NO in step S113), that is, human sensor 200B detects a person while human sensor 200A does not detect a person. When the human sensor 200A and the human sensor 200B recognize that no person is detected (YES in step S113), it is determined that there is no person in the room 401 (step S114).

  In this modification, in step S102, the CPU 110 may determine whether at least one of the human sensor 200A and the human sensor 200B has detected a person. In this case, when at least one of human sensor 200A and human sensor 200B detects a person, CPU 110 executes processing from step S104, and both human sensor 200A and human sensor 200B detect a person. If not detected, the process of step S102 is repeated.

<Modified example of sensing area of human sensor 200A, 200B>
Next, a modified example of the sensing areas 201A and 2001B of the human sensors 200A and 200B will be described. FIG. 6 is an image diagram showing an overall configuration of the network system 1 according to the present modification.

  In the above embodiment, as shown in FIG. 1, the network system 1 is installed on the human sensor 200 </ b> A disposed on the ceiling near the entrance (door) of the room 401 and the ceiling on the center of the room 401. The human sensor 200B is provided. The human sensor 200 </ b> A detects a person passing through the entrance of the room 401. The human sensor 200 </ b> B detects a person inside the room 401.

  On the other hand, in the present modification, as shown in FIG. 5, the network system 1 includes a human sensor 200 </ b> A disposed on the ceiling of the hallway 402 near the entrance (door) of the room 401, and the room 401. It includes a human sensor 200B installed on the ceiling and in the vicinity of the entrance (door) of the room.

  The human sensor 200 </ b> A detects a person who is outside the entrance of the room 401. The human sensor 200 </ b> B detects a person inside the room 401 at the entrance. It is preferable that the sensing area 201A of the human sensor 200A and the sensing area 201B of the human sensor 200B do not overlap.

  As described above, the network system 1 includes a human sensor 200A that senses an area through which a person entering and exiting the room 401 passes, and a human sensor 200B that is disposed inside (back) the room 401 with respect to the human sensor 200A. including. The controller 100 determines whether or not there is a person in the room 401 corresponding to the human sensors 200A and 200B based on the information from the human sensors 200A and 200B by the same process as the process described in the present embodiment. Judging.

<Other embodiments>
The present invention is achieved by supplying a program to the controller 100, the human sensors 200A and 200B, the lighting 301A and 301B, the air conditioner 302, the television 303, other home appliances, other mobile phones, and the like. Needless to say, this can also be applied. Then, a storage medium storing a program represented by software for achieving the present invention is supplied to the system or apparatus, and the computer (or CPU or MPU) of the system or apparatus stores the program code stored in the storage medium It is possible to enjoy the effects of the present invention also by reading and executing.

  In this case, the program code itself read from the storage medium realizes the functions of the above-described embodiment, and the storage medium storing the program code constitutes the present invention.

  Further, by executing the program code read by the computer, not only the functions of the above-described embodiments are realized, but also an OS (operating system) running on the computer based on the instruction of the program code However, it is needless to say that a case where the function of the above-described embodiment is realized by performing part or all of the actual processing and the processing is included.

  Further, after the program code read from the storage medium is written to a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer, the function expansion is performed based on the instruction of the program code. It goes without saying that the CPU or the like provided in the board or the function expansion unit performs part or all of the actual processing and the functions of the above-described embodiments are realized by the processing.

  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.

  1 network system, 100 controller, 101 memory, 101A sensor table, 102 display, 103 tablet, 104 button, 105 communication interface, 106 touch panel, 107 speaker, 108 clock, 110 CPU, 200A, 200B human sensor, 201A, 201B sensing Area, 301A, 301B lighting, 302 air conditioner, 303 TV, 401 rooms, 402 corridor.

Claims (6)

A first human sensor for sensing an area near the entrance of the room;
A second human sensor for sensing an area inside the room rather than an area near the entrance;
With a controller,
The controller is
A communication interface for receiving first information indicating a sensing result from the first human sensor and receiving second information indicating a sensing result from the second human sensor;
Based on the first and second information, viewed contains a processor for determining whether there is a person in the room,
The processor is
When the first or second human sensor detects a person, it is determined that there is a person in the room,
After the first human sensor detects a person and the second human sensor does not detect a person, the first and second human sensors do not detect a person. A network system that judges that there are no people. The network system according to claim 1 , wherein a sensing area of the first human sensor and a sensing area of the second human sensor do not overlap. Further comprising lighting disposed within the room;
The communication interface can communicate with the illumination,
The processor is
When it is determined that there is a person in the room, the lighting is turned on via the communication interface,
Wherein when it is determined that no one in the room, turns off the lighting through the communication interface, network system according to claim 1 or 2. A first human sensor for sensing an area near the entrance of the room; a second human sensor for sensing an area inside the room from the area near the entrance; and a controller. A presence determination method in a network system,
The controller receiving first information indicating a sensing result from the first human sensor;
The controller receiving second information indicating a sensing result from the second human sensor;
The controller determining whether there is a person in the room based on the first and second information ;
In the determining step, when the first or second human sensor detects a person, it is determined that there is a person in the room, and the first human sensor detects the person while the second human sensor detects the person. A presence / absence determination method , comprising : determining that there is no person in the room if the first and second human sensors do not detect a person after the sensor does not detect a person . First information indicating a sensing result is received from a first human sensor for sensing an area near the entrance of the room, and a first area for sensing an area inside the room from the area near the entrance. A communication interface for receiving second information indicating a result of sensing from two human sensors;
A processor for determining whether or not there is a person in the room based on the first and second information ,
The processor is
When the first or second human sensor detects a person, it is determined that there is a person in the room,
After the first human sensor detects a person and the second human sensor does not detect a person, the first and second human sensors do not detect a person. A controller that determines that there are no people . A first human sensor for sensing an area near the entrance of the room and a communication interface for communicating with a second human sensor for sensing an area inside the room from the area near the entrance; A presence / absence determination method in a controller including a processor,
Receiving the first information indicating the result of sensing from the first human sensor via the communication interface;
The processor receiving second information indicating a sensing result from the second human sensor via the communication interface;
The processor determining whether there is a person in the room based on the first and second information ;
In the determining step, when the first or second human sensor detects a person, it is determined that there is a person in the room, and the first human sensor detects the person while the second human sensor detects the person. A presence / absence determination method , comprising : determining that there is no person in the room if the first and second human sensors do not detect a person after the sensor does not detect a person .

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