Determination system, determination method, and program

Abstract

To provide a determination system that can determine whether or not a person is present in a building.SOLUTION: A determination system 20 includes: a communication unit 21 that receives first information indicating the detection result of a sensor 11 that detects the opening and closing of a door 61 installed at an entrance 62 of a building 60 and receives second information indicating the presence of a person in the building 60; and a determination unit 24 that determines that a person is present in the building in a target period when the second information is received within the target period from one receipt of the first information to another receipt of the first information. When the time elapsed between the receipt of the first information and the receipt of another first information is within a predetermined period of time, the determination unit 24 processes the two receipts of the first information as one receipt of the first information.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a determination system and the like. [Background technology]

[0002] There is known a technology for determining whether or not a person is present in a building. Patent Document 1 discloses a management system that can determine whether or not a user is present in a room by using a detection signal obtained from a human presence sensor installed in the room during a predetermined time period from when a door sensor attached to the door of the room receives a detection signal of the movement of the door to the room. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-140355 Summary of the Invention [Problem to be solved by the invention]

[0004] The present disclosure provides a determination system and the like that can determine whether or not a person is present in a building. [Means for solving the problem]

[0005] A determination system according to one embodiment of the present invention includes a communication unit that receives first information indicating the detection result of a sensor that detects the opening and closing of a door installed at the entrance and exit of a building, and receives second information that directly or indirectly indicates the presence of a person in the building, a determination unit that determines whether the person is present in the building based on the received first information and second information, and an output unit that outputs determination result information that indicates the result of the determination by the determination unit, wherein if the second information is received within a target period from one reception of the first information to another reception of the first information, the determination unit determines that the person is present in the building during the target period, and if the time that has elapsed between the reception of the first information and the reception of another piece of the first information is within a predetermined time, performs processing to regard the two receptions of the first information as one reception of the first information.

[0006] A determination method according to one embodiment of the present invention is a determination method executed by a computer system, and includes a communication step of receiving first information indicating the detection result of a sensor that detects the opening and closing of a door installed at the entrance and exit of a building, and receiving second information that directly or indirectly indicates the presence of a person in the building, a determination step of determining whether or not the person is present in the building based on the received first information and second information, and an output step of outputting determination result information that indicates the result of the determination in the determination step, in which, if the second information is received within a target period from one reception of the first information to another reception of the first information, it is determined that the person is present in the building during the target period, and if the time that has elapsed from the reception of the first information to the reception of another piece of first information is within a predetermined time, a process is performed to consider the two receptions of the first information as one reception of the first information.

[0007] A program according to one aspect of the present invention is a program for causing the computer system to execute the determination method. Effect of the Invention

[0008] The determination system etc. of the present disclosure can determine whether or not people are present in a building. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a block diagram showing a configuration of an occupancy determination system according to an embodiment. [Diagram 2] FIG. 2 is a diagram showing an example of installation positions of an entrance door sensor, an interior door sensor, a distribution board, and devices in a building. [Diagram 3] FIG. 3 is a diagram showing an example of installation of an entrance door sensor. [Figure 4] FIG. 4 is a time chart showing an example of a process performed by the determination unit when the determination unit receives the first information multiple times. [Diagram 5] FIG. 5 is a time chart showing a specific example of determining whether or not a person is present. [Figure 6A] FIG. 6A is a time chart showing an example of a specific determination regarding the estimation of the presence or absence of a person. [Figure 6B] FIG. 6B is a time chart showing another example of a specific determination regarding the estimation of the presence or absence of a person. [Figure 7] FIG. 7 is a time chart showing the use of an IH cooking heater by people living in a building during the target period from time B to time C. [Figure 8] FIG. 8 is a diagram showing an example of display of determination result information indicating the current occupancy status acquired by the first terminal device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. Note that each of the embodiments described below shows a specific example of the present disclosure. Therefore, the numerical values, shapes, materials, components, the arrangement and connection of the components, as well as the processes (steps) and the order of the processes shown in the following embodiments are merely examples and are not intended to limit the present disclosure. Therefore, among the components in the following embodiments, components that are not described in the independent claims of the present disclosure will be described as optional components.

[0011] (Embodiment) [Configuration of the occupancy determination system] First, the configuration of an occupancy determination system 1 according to an embodiment will be described with reference to Fig. 1. Fig. 1 is a block diagram showing the configuration of an occupancy determination system 1 according to an embodiment. For example, the occupancy determination system 1 is a system that is introduced into a building 60 (such as a residence) in which elderly people who live alone reside.

[0012] 1 , the occupancy determination system 1 includes a front door sensor 11, an interior door sensor 12, a determination system 20, a gateway 30, a distribution board 40, a device 50, a first terminal device 100, and a second terminal device 110. Of the components included in the occupancy determination system 1, the components other than the determination system 20, the first terminal device 100, and the second terminal device 110 are installed in a building 60.

[0013] The occupancy determination system 1 is a system for notifying a monitor of whether or not a person is present in the building 60. For example, if the person living in the building 60 is an elderly person, the monitor may be a manager who is stationed in the building 60, an operator of a business that provides a home care service contracted by the elderly person, or a family member of the elderly person. The building 60 may be, for example, an apartment building, a detached house, or the like, or may be a nursing facility or a hospital, or the like.

[0014] A person living in the building 60 goes out from the building 60 and returns home to the building 60. That is, if a person is living normally in the building 60, the person opens and closes the door 61 at the entrance (entrance 62) of the building 60. Also, if a person is present in the building 60, the person drinks tea in the refrigerator 54 or uses the toilet. That is, if a person is present in the building 60, the person opens and closes the door of the refrigerator 54, the toilet, or the like. The determination system 20 included in the presence determination system 1 can determine whether or not a person is present in the building 60 based on first information indicating the detection result of the entrance door sensor 11 that detects the opening and closing of the door 61 installed at the entrance 62 and second information indicating the detection result of the interior door sensor 12 that detects the opening and closing of a door inside the building 60 that is installed at the door of the refrigerator 54, the toilet, or the like.

[0015] The second information described above is not limited to the opening and closing of the door. For example, if a person is present in the building 60, the equipment (in other words, electrical equipment) installed in the building 60, such as the lighting device 51, is turned on and off. In other words, if a person is present in the building 60, a certain degree of fluctuation occurs in the amount of electricity used in the building 60. The determination system 20 included in the presence determination system 1 can determine whether or not a person is present in the building 60 based on the first information indicating the detection result of the entrance door sensor 11 that detects the opening and closing of the door 61 installed at the entrance 62 and the second information indicating the detection result of the fluctuation in the amount of electricity used in the building 60, using the electricity usage measurement function of the distribution board 40.

[0016] The determination system 20 transmits the result of the determination as to whether or not a person is present in the building 60 to a first terminal device 100 used by a monitor such as a business providing a home care service. This allows the monitor to know in real time whether or not a person is present in the building 60. Each component of the presence determination system 1 will be described below.

[0017] [Entrance door sensors, interior door sensors, distribution boards, and equipment] First, the front door sensor 11, the interior door sensor 12, the distribution board 40, and the device 50 will be described. Fig. 2 is a diagram showing an example of installation positions of the front door sensor 11, the interior door sensor 12, the distribution board 40, and the device 50 in a building 60. In Fig. 2, the front door sensor 11 is represented by a double circle mark, the interior door sensor 12 by a circle mark, and the distribution board 40 by a triangle mark. Fig. 3 is a diagram showing an example of installation of the front door sensor 11.

[0018] As shown in Fig. 2 and Fig. 3, the front door sensor 11 detects the opening and closing of a door 61 installed at a front door 62 of a building 60, and outputs first information indicating the detection result. The front door sensor 11 is a magnetic sensor realized by a magnet attached to one of the door 61 and the door frame 63, and a magnet sensor attached to the other of the door 61 and the door frame 63. The front door sensor 11 may also be an acceleration sensor attached to the door 61, and the specific embodiment of the front door sensor 11 is not particularly limited. The door 61 is, for example, the door of the front door 62, but may also be a door such as a back door.

[0019] As shown in FIG. 2, the interior door sensor 12 is a sensor attached to the door of a refrigerator 54 or the like installed in a building 60 or to a door installed in a room (e.g., a toilet, a bathroom, etc.) in the building 60. The interior door sensor 12 detects whether the door to which the interior door sensor 12 is attached is opened or closed, and outputs second information indicating the presence of a person in the room (detection result). The interior door sensor 12 is a magnetic sensor realized by a magnet attached to one of the door and the door frame, and a magnet sensor attached to the other of the door and the door frame. The interior door sensor 12 may also be an acceleration sensor attached to the door, and the specific embodiment of the interior door sensor 12 is not particularly limited.

[0020] The distribution board 40 is a device that measures the amount of electricity used in the building 60 (in other words, the amount of power consumed) for each branch circuit, and outputs electricity usage information indicating the measured amount of electricity used. This electricity usage information is another example of second information indicating the presence of a person in the building 60. If a device 50 that is turned on and off due to the presence of a person, such as a lighting device 51, is connected to a branch circuit, it is possible to determine whether or not a person is present in the building 60 by monitoring the electricity usage information of the branch circuit. The distribution board 40 is an example of a device that can measure the amount of electricity used by the device 50, and may be a watt-hour meter having a communication function, such as a smart meter.

[0021] In addition, a lighting device 51, a washing machine 52, and an IH cooking heater 53, which will be described later, are each connected to a branch circuit. This allows the distribution board 40 to monitor the amount of electricity used by each of the devices 50.

[0022] The device 50 is an electrical device used by people in the building 60. The device 50 is, for example, a lighting device 51, a washing machine 52, or an IH (Induction Heating) cooking heater 53, but may be other electrical devices used by people in the building 60. Although the lighting device 51 and the IH cooking heater 53 are not shown in Fig. 2, the lighting device 51 is installed on a ceiling or a wall in the building 60, and the IH cooking heater 53 is installed in the kitchen.

[0023] [gateway] As shown in FIG. 1, the gateway 30 is a gateway device that relays communication between the front door sensor 11, the indoor door sensor 12, and the distribution board 40 and the determination system 20. The communication performed by the gateway 30 may be wireless communication or wired communication. The communication standard used by the gateway 30 is not particularly limited. For example, the gateway 30 uses short-range wireless communication such as Bluetooth (registered trademark) when communicating with the front door sensor 11, the indoor door sensor 12, and the distribution board 40, and uses a wide area communication network such as the Internet when communicating with the determination system 20. The gateway 30 may be included in the distribution board 40, and the distribution board 40 may perform the function of the gateway 30.

[0024] [Judgment system] The determination system 20 is a system that determines whether or not a person is present in the building 60. The determination system 20 is, for example, a system that exists on the cloud. The determination system 20 includes a communication unit 21, an information processing unit 22, and a storage unit 23.

[0025] The communication unit 21 is a communication circuit for the determination system 20 to communicate with the gateway 30, the first terminal device 100, and the second terminal device 110. The communication unit 21 can also communicate with the front door sensor 11, the indoor door sensor 12, and the distribution board 40 via the gateway 30. There is no particular limitation on the communication standard of the communication performed by the communication unit 21.

[0026] Furthermore, the communication unit 21 receives the first information output by the front door sensor 11 and the second information output by the interior door sensor 12 or the distribution board 40. When receiving the first information and the second information, the communication unit 21 acquires the time when the first information and the second information are received.

[0027] Moreover, the communication unit 21 transmits the determination result information output by the output unit 26, which will be described later, to the first terminal device 100. Furthermore, the communication unit 21 transmits the third information output by the output unit 26, which will be described later, to the first terminal device 100 and the second terminal device 110. Note that the determination result information and the third information will be described in detail later.

[0028] The information processing unit 22 determines whether or not a person is present in the building 60, and outputs the result of the determination. Specifically, the information processing unit 22 includes a determination unit 24, a calculation unit 25, and an output unit 26. The information processing unit 22 is realized by, for example, a microcomputer, but may also be realized by a processor or a dedicated circuit.

[0029] The determination unit 24 determines whether or not a person is present in the building 60 based on the first information and the second information received by the communication unit 21.

[0030] The calculation unit 25 uses the result of the determination by the determination unit 24 to calculate the number of times and the time that people who reside in the building 60 go out.

[0031] The output unit 26 outputs determination result information indicating the result of the determination made by the determination unit 24. Furthermore, the determination unit 24 outputs third information regarding the number of times and the time that people living in the building 60 went out, which is calculated by the calculation unit 25.

[0032] The storage unit 23 is a storage device that stores programs and the like executed by the information processing unit 22. The storage unit 23 is realized by, for example, a semiconductor memory.

[0033] The storage unit 23 stores the time when the communication unit 21 received the first information in association with the first information. Similarly, the storage unit 23 stores the time when the communication unit 21 received the second information in association with the second information. Furthermore, the storage unit 23 stores the determination result information and the third information.

[0034] [First terminal device and second terminal device] The first terminal device 100 is an information terminal used by the above-mentioned monitor to receive information transmitted by the determination system 20. The first terminal device 100 may be, for example, a portable information terminal such as a smartphone or a tablet terminal, or may be a stationary information terminal device such as a personal computer.

[0035] The first terminal device 100 also includes a communication unit 101 , an information processing unit 102 , and a display unit 103 .

[0036] The communication unit 101 receives the determination result information or the third information transmitted by the communication unit 21. There is no particular limitation on the communication standard used by the communication unit 101. For example, the communication unit 101 communicates with the communication unit 21 using a wide area communication network such as the Internet.

[0037] The information processing unit 102 displays the determination result information and the third information received by the communication unit 101 on the display unit 103. The information processing unit 102 is realized by, for example, a microcomputer, but may also be realized by a processor or a dedicated circuit.

[0038] The display unit 103 is realized by, for example, a display including a liquid crystal panel or an organic EL panel.

[0039] The second terminal device 110 is an information terminal used by a person living in the building 60 to receive information transmitted by the determination system 20. The second terminal device 110 may be, for example, a portable information terminal such as a smartphone or a tablet terminal, or may be a stationary information terminal device such as a personal computer.

[0040] The second terminal device 110 also includes a communication unit 111 , an information processing unit 112 , and a display unit 113 .

[0041] The communication unit 111 receives the third information transmitted by the communication unit 21. There is no particular limitation on the communication standard used by the communication unit 111. For example, the communication unit 111 communicates with the communication unit 21 by using a wide area communication network such as the Internet.

[0042] The information processing unit 112 displays the third information received by the communication unit 111 on the display unit 113. The information processing unit 112 is realized by, for example, a microcomputer, but may also be realized by a processor or a dedicated circuit.

[0043] The display unit 113 is realized by, for example, a display including a liquid crystal panel or an organic EL panel.

[0044] [Example of processing performed by the determination unit using the first information] Hereinafter, an example of the process performed by the determination unit 24 when a person opens and closes the door 61 of the entrance 62 of the building 60 multiple times will be described. FIG. 4 is a time chart showing an example of the process performed by the determination unit 24 when the determination unit 24 receives the first information multiple times. FIG. 4(a) is a time chart when the communication unit 21 receives the first information indicating that the door 61 is open at times A, C, and E, and receives the first information indicating that the door 61 is closed at times B, D, and F. FIG. 4(b) is a time chart when the communication unit 21 receives the first information indicating that the door 61 is open at time G, and receives the first information indicating that the door 61 is closed at time H. In addition, in FIG. 4(a) and FIG. 4(b), the upper part shows the result of receiving the first information, and the lower part shows the result of the process performed by the determination unit 24.

[0045] The double-headed arrows shown in (a) and (b) of Fig. 4 indicate a predetermined time set in advance by the people living in the building 60 and the supervisor. The predetermined time may be, for example, 30 seconds or 10 minutes, but in this embodiment, it is 2 minutes. Note that (a) and (b) of Fig. 4 are schematic diagrams for explaining an example of the processing performed by the determination unit 24, and the lengths of time indicated by the time charts and the lengths of the double-headed arrows shown in (a) and (b) of Fig. 4 are not necessarily accurate.

[0046] Whenever a person in the building 60 goes out or comes home, the door 61 is always opened and closed, and there is a high possibility that the presence and absence of a person will be switched between before and after the opening and closing of the door 61. Therefore, the determination unit 24 determines a target period based on the reception of first information corresponding to the opening and closing of the door 61, and determines whether a person is present or absent for each target period.

[0047] Here, in cases where a person receives a package outside the entrance 62 and immediately returns to the building 60, or where a person goes out but then returns to the building 60 to retrieve something they left behind, the door 61 will be repeatedly opened and closed within a short period of time. However, it is considered unlikely that presence and absence will be switched during this short period of time. In other words, it is considered inappropriate to simply determine the target period based on the reception of the first information corresponding to the opening and closing of the door 61.

[0048] Therefore, the determination unit 24 uses the above-mentioned predetermined time as a criterion for whether the door 61 has been opened and closed within a short period of time, and treats these as one reception of the first information even if the first information is received again within the predetermined time after the first information is received. If the determination unit 24 receives the first information after the predetermined time has elapsed since the first information was received, it treats each of these as one reception of the first information, and sets the period from the reception of one piece of first information to the reception of another piece of first information as the target period. The target period refers to the period during which the determination unit 24 determines whether or not a person is present in the building 60.

[0049] In the example of FIG. 4(a), the determination unit 24 performs processing to regard the period before time A, the period from time D to time E, and the period after time F as the target period.

[0050] 4(a) in more detail, since the time that has elapsed since the first information was received at time A until the first information was received at time B is within the predetermined time, the first information received at times A and B is regarded as one reception of the first information. When the first information is received at time B, the count of the predetermined time is reset, and the next predetermined time is counted starting from time B. In other words, the count of the predetermined time starts from 0 each time the first information is received.

[0051] Because the time that has elapsed from when the first information is received at time B until when the first information is received at time C is within a predetermined time, the first information received from times A to C is considered to be one reception of the first information. Because the time that has elapsed from when the first information is received at time C until when the first information is received at time D is within a predetermined time, the first information received from times A to D is considered to be one reception of the first information. In other words, the period from time A to time D is not considered to be the target period.

[0052] Because the time that has elapsed from when the first information is received at time D to when the first information is received at time E exceeds a predetermined time, the determination unit 24 regards the first information received from time A to time D as one reception of the first information, and regards the first information received at time E as another reception of the first information. In other words, the determination unit 24 performs processing to regard the period from time D to time E as target period 2.

[0053] Note that, in this diagram, the first information received before time A is not described, but the first information received at time A is received after a predetermined time has elapsed since the first information received before time A. As a result, the determination unit 24 performs processing to regard the period before time A as target period 1. Similarly, in this diagram, the first information received after time F is not described, but the first information received after time F is received after a predetermined time has elapsed since the first information received at time F. As a result, the determination unit 24 performs processing to regard the period after time F as target period 3.

[0054] Furthermore, the determination unit 24 determines that the time that has elapsed from when the first information is received at time E until when the first information is received at time F is within a predetermined time. For this reason, the reception of the first information at time E and time F is regarded as one reception of the first information, and the period from time E to time F is not regarded as the target period.

[0055] As described above with reference to (a) of Fig. 4, when the first information is received twice within a predetermined time, the determination unit 24 regards it as a single reception of the first information, and therefore can exclude the period during which the door 61 is opened and closed from the target period. Therefore, the determination unit 24 can accurately identify the target period for determining whether or not a person is present in the building 60.

[0056] Furthermore, when the determination unit 24 regards two receptions of the first information as one reception of the first information, and then receives another piece of first information within a predetermined time, the determination unit 24 can regard three receptions of the first information as one reception of the first information. Thus, the determination unit 24 can more accurately specify the target period for determining whether or not a person is present in the building 60.

[0057] Next, an example of (b) in FIG. 4 will be described. As shown in (b) in FIG. 4, the time that has elapsed since the first information was received at time G until the first information was received at time H exceeds a predetermined time, so the determination unit 24 performs a process of regarding the period from time G to time H as the target period 5. In addition, for the time charts before time G and after time H, the determination unit 24 performs a process of regarding the period before time G as the target period 4 and the period after time H as the target period 6, for the same reason as the time charts before time A and after time F described in (a) in FIG. 4. In other words, two or more pieces of first information are not necessarily required to specify the target period. For example, the determination unit 24 may perform a process of regarding the period after time G as the target period when a predetermined time has elapsed since the first information was received at time G.

[0058] [Example of judgment action based on secondary information detected by interior door sensor] An example of the determination operation based on the second information detected by the indoor door sensor 12 will be described below. Fig. 5 is a time chart showing a specific example of determining whether or not a person is present. In Fig. 5, the upper part shows the result of receiving the first information, the middle part shows the result of receiving the second information, and the lower part shows the result of the determination made by the determination unit 24.

[0059] 5, the communication unit 21 receives first information indicating that the door 61 of the entrance 62 is open at time A and time C, and receives first information indicating that the door 61 of the entrance 62 is closed at time B and time D. In addition, the communication unit 21 receives second information indicating the presence of a person when the indoor door sensor 12 detects the opening and closing of a door in the building 60 between time B and time C.

[0060] Next, the determination unit 24 performs the process described in FIG. 4. Specifically, since the time elapsed from time A to time B is within a predetermined time, the determination unit 24 performs a process of regarding the reception of the first information at time A and time B as one reception of the first information. In addition, since the time elapsed from time C to time D is also within a predetermined time, the determination unit 24 performs a similar process. Furthermore, since the time elapsed from time B to time C exceeds the predetermined time, the determination unit 24 performs a process of regarding the period from time B to time C as the target period. In addition, for the time chart before time A and after time D in FIG. 5, for the same reason as the time chart before time A and after time F described in FIG. 4(a), the determination unit 24 performs a process of regarding the period before time A and the period after time D as the target period.

[0061] When the second information is not received within the target period, the determination unit 24 determines that no one is present in the building 60 during the target period. In Fig. 5, the determination unit 24 determines that no one is present (absent) in the building 60 during the target period, since the second information is not received during the target period before time A and during the target period after time D.

[0062] Furthermore, when the second information is received within the target period, the determination unit 24 determines that a person is present in the building 60 during the target period. In Fig. 5, the determination unit 24 determines that a person is present (is present) in the building 60 during the target period, since the second information is received within the target period from time B to time C. Note that the determination unit 24 may determine that a person is not present during the target period from time B to time C until the second information is received, and may correct the result of the determination to that a person is present when the second information is received.

[0063] As a result, the determination unit 24 determines that a person is present in the building 60 when the second information is received within the target period.

[0064] Furthermore, the determination unit 24 can determine, based on the second information detected by the interior door sensor 12, whether or not a person is present in the building 60 during the target period.

[0065] [Example 1 of inferred behavior based on secondary information detected by indoor door sensor] An example of an estimation operation based on the second information detected by the indoor door sensor 12 will be described below. Estimation means judging whether or not a person is present in the building 60 during a target period using the results of judgments for a plurality of target periods. Fig. 6A is a time chart showing an example of a specific judgment regarding the estimation of the presence or absence of a person. In Fig. 6A, the top row shows the result of receiving the first information, the row one row below the top row shows the result of receiving the second information, the row two rows below the top row shows the result of the judgment before estimation performed by the judgment unit 24, and the lower row shows the result of the judgment after estimation performed by the judgment unit 24.

[0066] 6A, the communication unit 21 receives first information indicating that the door 61 of the entrance 62 is opened at time A, time C, time E, and time G, and receives first information indicating that the door 61 of the entrance 62 is closed at time B, time D, time F, and time H. In addition, the communication unit 21 receives second information indicating the presence of a person when the indoor door sensor 12 detects the opening and closing of a door in the building 60 between time B and time C.

[0067] Next, the determination unit 24 performs the process described in Fig. 4. Specifically, the determination unit 24 regards the reception of the first information at times A and B, times C and D, times E and F, and times G and H as one reception of the first information. In addition, the determination unit 24 performs a process of regarding the period from time B to time C, the period from time D to time E, and the period from time F to time G as target periods.

[0068] The determination unit 24 normally determines that a person is present in the building 60 during a target period when the second information is received during the target period, and determines that a person is not present in the building 60 during the target period when the second information is not received during the target period. In this figure, the second information is received only during the target period from time B to time C. Therefore, as shown in the results of the determination in the second row below the top row, the determination unit 24 determines that a person is present (is present) in the building 60 during the target period from time B to time C, and determines that a person is not present (is absent) in the building 60 during the target period from time D to time E and during the target period from time F to time G. Note that the result of the determination before estimation performed by the determination unit 24 is not the result of the determination actually performed by the determination unit 24. The result of the determination actually performed by the determination unit 24 is the result of the determination after estimation performed by the determination unit 24, which will be described below.

[0069] However, as described above, if the determination unit 24 makes a determination based only on the result of receiving the second information within one target period, there are cases where an accurate determination cannot be made. For example, if a person is actually present in the building 60 within the target period from time F to time G, but the person does not open or close the door in the building 60, the determination unit 24 will erroneously determine that no person is present in the building 60. In other words, the determination that a person is present is highly accurate because it requires the reception of the second information, which does not occur unless a person is present in the building 60. In contrast, the determination that a person is absent requires the non-reception of the second information, so there is a possibility that a person is actually present during the target period in which it was determined that a person is absent.

[0070] Therefore, when target periods in which it has been determined that no one is present continue, the determination unit 24 may use an estimation operation (estimation algorithm) that assumes that the presence and absence of a person are switched (reversed) at the boundary of the target periods, thereby determining that a person is present in the building 60 during the target period even if the second information has not been received during the target period. The estimation operation will be described below.

[0071] First, the determination unit 24 determines that a person is present (is present) in the building 60 during the target period from time B to time C when the second information is received.

[0072] Next, the determination unit 24 performs an estimation operation for the target period from time D to time E, which is immediately after the target period from time B to time C. The determination unit 24 determines that a person is present during the target period from time B to time C, and regards times C and D as receiving one piece of first information. From this, the determination unit 24 estimates that the first information received by the communication unit 21 at times C and D is the first information obtained when a person residing in the building 60 opened and closed the door 61 to go out. From this estimation, the determination unit 24 determines that no person is present (absent) in the building 60 during the target period from time D to time E.

[0073] As a result, the determination unit 24 can estimate whether or not people are present in the building 60 by using the determination result information obtained in the immediately preceding target period in determining the target period.

[0074] Furthermore, the determination unit 24 performs an estimation operation for the target period from time F to time G, which is immediately after the target period from time D to time E. The determination unit 24 determines that a person is absent during the target period from time D to time E, and regards times E and F as receiving one piece of first information. From this, the determination unit 24 estimates that the first information received by the communication unit 21 at times E and F is the first information obtained when a person residing in the building 60 opened and closed the door 61 to return home. From this estimation, the determination unit 24 determines that a person is present (is present) in the building 60 during the target period from time F to time G.

[0075] As a result, the determination unit 24 can estimate whether or not people are present in the building 60 by using the determination result information obtained by estimation in the immediately preceding target period in determining the target period.

[0076] The determination unit 24 can perform the determination using the above-described estimation operation until the target period during which the second information is received appears.

[0077] [Example 2 of inferred behavior based on secondary information detected by indoor door sensor] Hereinafter, another example of the estimation operation based on the second information detected by the indoor door sensor 12 will be described. Fig. 6B is a time chart showing another example of a specific judgment regarding the estimation of the presence or absence of a person. Note that Fig. 6B is a time chart showing a continuation of the time chart of Fig. 6A. In Fig. 6B, the upper row shows the result of receiving the first information, the row one row below the top shows the result of receiving the second information, the row two rows below the top shows the result of the judgment after the estimation in Fig. 6A, and the lower row shows the result of the judgment after the estimation in Fig. 6B.

[0078] The estimation operation in FIG. 6B is effective when the determination unit 24 performs a determination multiple times using the estimation operation. When the determination unit 24 performs a determination multiple times using the estimation operation, the accuracy of the result of the determination becomes low. Therefore, when a target period in which the second information is received appears, the determination unit 24 may perform an estimation operation to determine that a person is present (is present) in the building 60 during the target period and to correct the result of the determination during the target period prior to the target period. This allows the determination unit 24 to perform a determination during the past target period using a more accurate determination result. The estimation operation will be described below. Note that the operation example shown in FIG. 6B is an example in which, although no person is actually present in the building 60 during the target period from time F to time G, the determination unit 24 erroneously determines that a person is present (is present) in the building 60 using the estimation operation in FIG. 6A.

[0079] 6B, the communication unit 21 receives first information indicating that the door 61 of the entrance 62 is opened at time I, and receives first information indicating that the door 61 of the entrance 62 is closed at time J. In addition, the communication unit 21 receives second information indicating the presence of a person when the indoor door sensor 12 detects the opening and closing of a door in the building 60 between time H and time I.

[0080] Next, the determination unit 24 performs the process described in Fig. 4. Specifically, the determination unit 24 regards the reception of the first information at time I and time J as one reception of the first information. In addition, the determination unit 24 performs a process of regarding the period from time H to time I as the target period.

[0081] Then, since the second information is received only during the target period from time B to time C, the judgment unit 24 judges that a person is present (occupied) in the building 60 during the target period from time B to time C.

[0082] Here, the determination unit 24 compares the result of the determination in the target period from time F to time G with the result of the determination in the target period from time H to time I. Specifically, since the determination unit 24 regards the reception of the first information as one time at time G and time H, it estimates that a person entered and left the building 60 during the period from time G to time H. As a result, the determination unit 24 estimates that a person was present during either the target period from time F to time G or the target period from time H to time I, and that a person was absent during the other target period. Here, since the second information was not received during the target period from time F to time G, and the second information was received during the target period from time H to time I, the determination unit 24 estimates that it is highly likely that a person was present in the building 60 during the target period from time H to time I. Therefore, the determination unit 24 determines that a person was present during the target period from time H to time I, and determines that a person was absent during the target period from time F to time G. This enables the determination unit 24 to perform an estimation operation to correct the result of the determination made before that period.

[0083] This allows the determination unit 24 to estimate whether or not people are present in the building 60 by using the result of the determination obtained in the immediately following target period when determining the target period.

[0084] Furthermore, the determination unit 24 may estimate whether or not a person is present in the building 60 by using the result of the determination obtained by estimation in the immediately following target period when determining the target period. For example, in the example of Fig. 6B, the determination for the target period from time D to time E may be estimated by using the result of the determination obtained by estimation in the target period from time F to time G. In other words, the determination unit 24 may determine that a person is present in the target period from time D to time E by using the result of the determination that a person is absent in the target period from time F to time G.

[0085] [Example of decision making based on secondary information measured by the distribution board] An example of a determination operation based on the second information detected by the distribution board 40 will be described below. Fig. 7 is a time chart showing an example of a specific determination of the presence or absence of a person when the second information is electricity usage information. Fig. 7 is a time chart when a person residing in the building 60 uses the IH cooking heater 53 during a target period from time B to time C. In Fig. 7, the top row shows the result of receiving the first information, the row one row below the top shows the electricity usage information of the IH cooking heater 53 measured by the distribution board 40, the row two rows below the top shows the result of receiving the electricity usage information, and the lower row shows the result of the determination made by the determination unit 24.

[0086] As shown in FIG. 7, the communication unit 21 receives first information indicating that the door 61 of the entrance 62 is opened at time A and time C, and receives first information indicating that the door 61 of the entrance 62 is closed at time B and time D.

[0087] The determination unit 24 performs the process described in Fig. 4. Specifically, the determination unit 24 regards the reception of the first information at time A and time B, and time C and time D as one reception of the first information. The determination unit 24 also performs a process of regarding the period from time B to time C as the target period. Furthermore, for the time chart of before time A and after time D in Fig. 7, for the same reasons as the time chart of before time A and after time F described in (a) of Fig. 4, the determination unit 24 performs a process of regarding the period before time A and the period after time D as the target period.

[0088] During the target period from time B to time C, a person living in building 60 starts to use IH cooking heater 53, and then stops using IH cooking heater 53. At this time, as shown in the next row below from the top, distribution board 40 measures the amount of electricity used (W) in using IH cooking heater 53.

[0089] As shown in the second row below from the top, the communication unit 21 receives electricity usage information indicating the electricity usage measured by the distribution board 40. The electricity usage information received by the communication unit 21 is information regarding the total amount of electricity usage (W) consumed by the devices 50 during a predetermined interval. The predetermined interval is a time set in advance by the above-mentioned monitor. The predetermined interval may be one minute or one hour, but is 30 minutes in this embodiment. In other words, the communication unit 21 receives the electricity usage information at every predetermined interval. As a result, the timing at which the communication unit 21 receives the second information is different from the timing at which the distribution board 40 starts measuring the electricity usage.

[0090] The determination unit 24 calculates the difference between the total amount of electricity usage measured during the predetermined interval and the total amount of electricity usage measured during the predetermined interval immediately before the predetermined interval. If the difference is greater than a preset threshold, the determination unit 24 determines that the electricity usage information measured during the predetermined interval is to be regarded as the second information. On the other hand, if the difference is smaller than the threshold, the determination unit 24 determines that the electricity usage information measured during the predetermined interval is not to be regarded as the second information. By setting a threshold, the determination unit 24 can determine that the total amount of standby power of the device 50 is not to be regarded as the second information. This allows the determination unit 24 to make a more accurate determination.

[0091] In the time chart shown in the second lower row from the top of FIG. 7, the electricity usage information fluctuates four times. For example, the determination unit 24 determines not to regard the first and fourth fluctuations of the electricity usage information as the second information because the fluctuation amounts of the first and fourth electricity usage information are smaller than the threshold value. Also, the determination unit 24 determines to regard the second and third fluctuations of the electricity usage information as the second information because the fluctuation amounts of the second and third electricity usage information are larger than the threshold value. Furthermore, if the fluctuation amount is the second information indicating an increase, the determination unit 24 determines to regard it as the second information indicating that the use of the device 50 has started, and if the fluctuation amount is the second information indicating a decrease, the determination unit 24 determines to regard it as the second information indicating that the use of the device 50 has ended. That is, in FIG. 7, the determination unit 24 determines to regard the second fluctuation of the electricity usage information as the second information indicating that the use of the device 50 has started, and determines to regard the third fluctuation of the electricity usage information as the second information indicating that the use of the device 50 has ended.

[0092] When second information indicating an increase in the amount of variation is continuously received, the determination unit 24 determines that the second information having the earliest time in the target period is regarded as second information indicating that use of the device 50 has started, and determines that the other second information is regarded as second information indicating continued use of the device 50. When second information indicating a decrease in the amount of variation is continuously received, the determination unit 24 determines that the second information having the earliest time in the target period is regarded as second information indicating that use of the device 50 has ended, and determines that the other second information is regarded as second information received after use of the device 50 has ended.

[0093] 7, since the second information is received only during the target period from time B to time C, the determination unit 24 determines that a person is present in the building 60 (is present) during the target period from time B to time C. Furthermore, since the second information is not received during the target period before time A and after time D, the determination unit 24 determines that a person is not present in the building 60 (is not present) during the target period before time A and after time D.

[0094] This allows the determination unit 24 to determine, based on the electricity usage information received by the communication unit 21, whether or not anyone is present in the building 60 during the target period.

[0095] [Modification of the determination operation based on the second information measured by the distribution board] In the above description, the determination unit 24 determines whether or not a person is present in the building 60 based on the electricity usage information of the IH cooking heater 53. However, it may also determine whether or not a person is present in the building 60 based on the electricity usage information of the lighting device 51, the washing machine 52, etc. However, the lighting device 51 and the washing machine 52, etc. are devices 50 that may be used by a person who may go out of the building 60. However, in order to turn on and off the power of the lighting device 51, the person needs to operate a switch installed in the building 60 or a remote control in the building 60. In other words, when turning on and off the power of the lighting device 51, the person is definitely present in the building 60. In addition, the washing machine 52 is a device 50 that is turned on and starts operating by the person's selection of a switch, and automatically stops operating and turns off the power when the washing is finished. In other words, when turning on the power of the washing machine 52, the person is definitely present in the building 60.

[0096] Therefore, when the judgment unit 24 judges whether or not a person is present in the building 60 based on the electricity usage information of the device 50 that may be used outside, it may judge that a person is present in the building 60 if the time when the second information indicating that use of the device 50 has started or the second information indicating that use of the device 50 has ended is received is within the target period.

[0097] Furthermore, when the type of the device 50 connected to the branch circuit cannot be identified, the determination unit 24 calculates the difference between the total amount of electricity usage measured during the predetermined interval and the total amount of electricity usage measured during the predetermined interval immediately before the predetermined interval, as in the case of the IH cooking heater 53, and makes a determination. However, the device 50 connected to the outlet may not be an electric device such as the IH cooking heater 53 that is used when the person is in the building 60, but may be an electric device that is operated by a timer operation or the like. In such a case, the determination unit 24 may make a presumptive determination that the person is in the building 60, rather than determining that the person is in the building 60. Note that the presumptive determination is a determination that may be corrected by a presumptive operation using the results of other determinations.

[0098] Furthermore, when the predetermined interval during which the electricity usage is measured spans two or more target periods, the determination unit 24 cannot identify in which target period the second information (electricity usage information) was measured, and therefore does not determine whether or not a person is present in the building 60 based on the second information. This enables the determination unit 24 to more accurately determine whether or not a person is present in the building 60.

[0099] Furthermore, the determination unit 24 may perform an estimation operation using a determination result based on the second information measured by the distribution board 40. The estimation operation is similar to the example of the estimation operation based on the second information detected by the indoor door sensor 12 described above.

[0100] Furthermore, the determination unit 24 may determine whether or not a person is present in the building 60 by combining the second information detected by the interior door sensor 12 and the second information measured by the distribution board 40. This enables the determination unit 24 to more accurately determine whether or not a person is present in the building 60.

[0101] [Determination accuracy] As described above, the results of the judgment made by the judgment unit 24 include judgment results with high accuracy and judgment results with low accuracy. However, if the judgment result information distinguished according to the accuracy is not displayed on the display unit 103, the presence judgment system 1 may not be able to provide detailed information to the monitor. Therefore, the judgment system 20 outputs judgment result information linked to a level indicating the accuracy of the judgment. The following describes a case where the level indicating the accuracy of the judgment is indicated in three stages. Note that the level indicating the accuracy of the judgment is not limited to three stages.

[0102] The determination unit 24 associates the result of the determination with one of levels 1, 2, or 3 according to the accuracy of the result of the determination. The value of each level indicates a higher accuracy as the number of the value of each level increases. Specifically, the determination unit 24 associates level 1 with the result of the determination when the second information is not obtained or the result of the determination when the determination unit 24 uses an estimation operation. The determination unit 24 also associates level 2 with the result of the determination when it is estimated that the person is present in the building 60. Furthermore, the determination unit 24 associates level 3 with the result of the determination when the second information detected by the indoor door sensor 12 is obtained within the target period or the result of the determination when the second information measured by the distribution board 40 is obtained within the target period.

[0103] This allows the determination unit 24 to associate a level indicating the accuracy of the determination with the result of the determination, and therefore the determination system 20 can provide detailed information to the observer.

[0104] In addition, when the determination unit 24 performs a determination multiple times using the estimated motion, the result of the determination using the estimated motion multiple times has a lower accuracy than the result of the determination using the estimated motion once. Therefore, the determination unit 24 may further associate a level indicating the accuracy of the determination with the result of the determination using the estimated motion. Therefore, the determination system 20 can provide detailed information to the monitor.

[0105] [Notification to observers] An example of a notification given to a monitor by the occupancy determination system 1 will be described below with reference to Fig. 8. Fig. 8 is a diagram showing a display example of determination result information indicating a current occupancy status acquired by the first terminal device 100. In Fig. 8, for example, the building 60 is an apartment building having eight rooms from room 101 to room 204. Also, the display unit 103 displays the determination result information for the eight rooms on the same screen, but the determination result information for each room may be displayed.

[0106] 8, the display unit 103 of the first terminal device 100 displays in real time the current occupancy status indicating whether or not a person is present in the building 60. Specifically, the current occupancy status is displayed in a table, with the room number displayed in the left column, the result of the determination made by the determination unit 24 displayed in the center column, and the accuracy of the result of the determination displayed in the right column.

[0107] For example, if a monitor wants to check the current occupancy status in room 101, he or she can see by looking at the column for room 101 that the judgment result is "present" and the accuracy is level 3. Therefore, the monitor can know that the person living in room 101 is definitely present. Furthermore, if a monitor wants to check the current occupancy status in room 104, he or she can see by looking at the column for room 104 that the judgment result is "present" and the accuracy is level 2. Therefore, the monitor can know that the person living in room 104 is probably present. Furthermore, if a monitor wants to check the current occupancy status in room 201, he or she can see by looking at the column for room 201 that the judgment result is "absent" and the accuracy is level 1. Therefore, the monitor can know that the person living in room 201 is not present according to the judgment result, but that there is a possibility that they may be present.

[0108] This allows the monitor to know in real time whether or not there is anyone in the building 60. For example, if the monitor is a manager who resides in the building 60, the monitor can consider visiting elderly people residing in the building 60 based on the determination result information.

[0109] In addition, the display unit 103 displays the result of the determination and the degree of accuracy of the determination. This allows the monitor to know the accuracy of the current occupancy status displayed in real time. Therefore, the determination system 20 can provide the monitor with detailed information.

[0110] In addition, the table showing the current occupancy status may display the room number and the result of the determination, and a color according to the degree of certainty may be displayed in the column for each room number and result of the determination.

[0111] [Third information notice] The following describes an example of notification of the third information by the occupancy determination system 1 to a person residing in the building 60 or a monitor. For example, the occupancy determination system 1 notifies the person or the monitor of a count result regarding the number of times and the time that the person residing in the building 60 went out during the past month.

[0112] The calculation unit 25 calculates the number of times and the time that the person has gone out using the result of the judgment by the judgment unit 24. Specifically, the calculation unit 25 regards the number of times during the target period in which the judgment unit 24 judges that the person is absent as the number of times the person has gone out, and regards the total time during the target period in which the judgment unit 24 judges that the person is absent as the time the person has gone out. The output unit 26 outputs third information regarding the number of times and the time the person has gone out calculated by the calculation unit 25. The processing method for displaying the output third information on the display unit 113 has been described above and will not be described here.

[0113] This allows the determination system 20 to output the past going-out status of a person residing in the building 60 or a supervisor.

[0114] If the person goes out frequently or for a long time, the determination unit 24 determines that the person exercises a lot, such as walking, when going out, and can determine that the person's health condition is likely to be maintained in a good state. On the other hand, if the person goes out frequently and for a short time, the determination unit 24 determines that the person does not exercise much, such as walking, when going out, and can determine that the person's health condition is likely to deteriorate. Therefore, the output unit 26 may output recommendation information according to the calculated number of times and time that the person goes out.

[0115] For example, the memory unit 23 stores recommendation information for a plurality of categories according to the number of times or the length of time that a person has gone out, and the output unit 26 outputs recommendation information associated with the category to which the calculated number of times or the length of time that the person has gone out belongs by referring to the memory unit 23. When a person has gone out only a few times and for a short time, recommendation information is output that points out that the person has gone out only a few times and for a short time, and encourages the person to go out. The output unit 26 may output third information related to the number of times and the length of time that the person has gone out, including the recommendation information.

[0116] This enables the determination system 20 to output, to the people residing in the building 60, recommendation information that is useful for the health management of the people.

[0117] [Effects, etc.] The inventions obtained from the disclosure of this specification are exemplified above, and the effects and the like obtained from the inventions are described.

[0118] Invention 1 is a judgment system 20 comprising a communication unit 21 that receives first information indicating the detection result of a sensor 11 that detects the opening and closing of a door 61 installed at an entrance (front door 62) of a building 60, and receives second information that directly or indirectly indicates the presence of a person in the building 60, a judgment unit 24 that judges whether or not a person is present in the building 60 based on the received first information and second information, and an output unit 26 that outputs judgment result information that indicates the result of the judgment by the judgment unit 24, wherein, if second information is received within a target period from the reception of one piece of first information to the reception of another piece of first information, the judgment unit 24 judges that a person is present in the building 60 during the target period, and, if the time that has elapsed from the reception of the first information to the reception of another piece of first information is within a predetermined time, performs processing to regard the reception of two pieces of first information as the reception of one piece of first information.

[0119] With this configuration, when the first information is received twice within a predetermined time, the determination unit 24 regards it as a single reception of the first information, and therefore the period during which the door 61 is opened and closed can be excluded from the target period. This allows the determination unit 24 to accurately specify the target period for determining whether or not a person is present in the building 60. Furthermore, when the second information is received within the target period, the determination unit 24 determines that a person is present in the building 60. Thus, the determination system 20 can determine whether or not a person is present in the building 60.

[0120] Invention 2 is a judgment system 20 of Invention 1, in which the judgment unit 24 performs processing to regard three receptions of first information as one reception of first information if the time elapsed between the reception of first information and the reception of another piece of first information is within a predetermined time and the time elapsed between the reception of another piece of first information and the reception of yet another piece of first information is within a predetermined time.

[0121] With this configuration, the determination unit 24 can, after determining that two receptions of the first information are one reception of the first information, determine that three receptions of the first information are one reception of the first information if another piece of first information is received within a predetermined time. This allows the determination unit 24 to more accurately specify the target period for determining whether or not a person is present in the building 60. Therefore, the determination system 20 can more accurately determine whether or not a person is present in the building 60.

[0122] Invention 3 is a judgment system described in Invention 1, in which, if the time that elapses between the reception of first information and the reception of another piece of first information is within a predetermined time, and the time that elapses between the reception of two pieces of first information following the first information is within the predetermined time, the judgment unit 24 performs processing to regard the period from the reception of the first piece of first information to the reception of the last piece of first information within the period determined to be within the predetermined time as being one reception of first information.

[0123] With this configuration, the determination unit 24 can, after determining that two receptions of the first information are one reception of the first information, determine that three receptions of the first information are one reception of the first information if another piece of first information is received within a predetermined time. This allows the determination unit 24 to more accurately specify the target period for determining whether or not a person is present in the building 60. Therefore, the determination system 20 can more accurately determine whether or not a person is present in the building 60.

[0124] Invention 4 is a determination system 20 of any of Inventions 1 to 3, in which the determination unit 24 determines that a person is present in the building 60 during the target period, and if second information is not received within a first target period immediately following the target period, determines that a person is absent from the building 60 during the first target period.

[0125] With this configuration, the determination unit 24 can estimate whether or not people are present in the building 60 by using the determination result information obtained in the immediately preceding target period in determining the target period. This enables the determination system 20 to more accurately determine whether or not people are present in the building 60.

[0126] Invention 5 is the judgment system 20 of Invention 4, wherein the judgment unit 24 further judges that a person is present in the building 60 during the second target period if the second information is not received during a second target period immediately following the first target period.

[0127] With this configuration, the determination unit 24 can estimate whether or not people are present in the building 60 by using the determination result information obtained by estimation in the immediately preceding target period in determining the target period. This enables the determination system 20 to more accurately determine whether or not people are present in the building 60.

[0128] Invention 6 is a judgment system 20 of any of Inventions 1 to 5, in which the judgment unit 24 determines that a person is present in the building 60 during the target period, and if the second information is not received during a third target period immediately preceding the target period, determines that a person is absent from the building 60 during the third target period.

[0129] With this configuration, the determination unit 24 can estimate whether or not people are present in the building 60 by using the result of the determination obtained in the immediately following target period when determining the target period. This enables the determination system 20 to more accurately determine whether or not people are present in the building 60.

[0130] Invention 7 is the judgment system 20 of Invention 6, in which the judgment unit 24 judges that no one is present in the building 60 during the fourth target period if the second information is not received during a fourth target period immediately preceding the third target period, judges that no one is present in the building 60 during the third target period if the second information is not received during a third target period following the fourth target period, and changes the judgment result for the third target period from "present" to "absent" if it is determined that no one is present in the building 60 during the target period.

[0131] With this configuration, the determination unit 24 can estimate whether or not people are present in the building 60 by using the result of the determination obtained by estimation in the immediately following target period when determining the target period. This enables the determination system 20 to more accurately determine whether or not people are present in the building 60.

[0132] An eighth aspect of the present invention is the determination system 20 of any one of the first to seventh aspects, in which the determination unit 24 associates a level indicating the accuracy of the determination with the result of the determination.

[0133] With this configuration, the determination unit 24 can associate a level indicating the accuracy of the determination with the result of the determination, thereby enabling the determination system 20 to provide detailed information to the observer.

[0134] A ninth aspect of the present invention is the determination system 20 of any one of the first to eighth aspects, wherein the second information is information indicating a detection result of a sensor installed in the building 60 that detects opening and closing of a door.

[0135] With this configuration, the determination unit 24 can determine, based on the second information detected by the interior door sensor 12, whether or not a person is present in the building 60 during the target period.

[0136] Invention 10 is the determination system 20 of any one of Inventions 1 to 8, wherein the second information is electricity usage information indicating the amount of electricity usage measured in the building 60.

[0137] With this configuration, the determination unit 24 can determine, based on the electricity usage information received by the communication unit 21, whether or not anyone is present in the building 60 during the target period.

[0138] Invention 11 is the judgment system 20 of any of Inventions 1 to 10, further comprising a calculation unit 25 that calculates the number of times and the time that the person goes out using the result of the judgment by the judgment unit 24, and the output unit 26 outputs third information regarding the number of times and the time that the person goes out calculated by the calculation unit 25.

[0139] With this configuration, the determination system 20 can output the past going-out status of a person residing in the building 60 or a supervisor.

[0140] Invention 12 is the determination system 20 of Invention 11, wherein the third information includes recommendation information according to the number of times and duration that the person went out, calculated by the calculation unit 25.

[0141] With this configuration, the determination system 20 can output, to the people residing in the building 60, recommendation information that is useful for the health management of the people.

[0142] Invention 13 is a judgment system 20 of any of Inventions 1 to 12, in which the output unit 26 outputs judgment result information to a terminal device (first terminal device 100) owned by a monitor who watches over the safety of people, and the display unit 103 of the terminal device (first terminal device 100) that has acquired the judgment result information displays in real time whether or not people are present in the building 60.

[0143] This configuration allows the monitor to know in real time whether or not anyone is present in the building 60.

[0144] Invention 14 is a determination method executed by a computer system, and includes a communication step of receiving first information indicating the detection result of a sensor that detects the opening and closing of a door 61 installed at the entrance (front door 62) of a building 60, and receiving second information that directly or indirectly indicates the presence of a person in the building 60, a determination step of determining whether or not a person is present in the building 60 based on the received first information and second information, and an output step of outputting determination result information that indicates the result of the determination in the determination step, in which, if second information is received within a target period from the reception of one first information to the reception of another first information, the determination step determines that a person is present in the building 60 during the target period, and if the time that has elapsed from the reception of the first information to the reception of another first information is within a predetermined time, a process is performed to regard the reception of two pieces of first information as the reception of one piece of first information.

[0145] With this configuration, when the first information is received twice within a predetermined time, the determination unit 24 regards it as a single reception of the first information, and therefore the period during which the door 61 is opened and closed can be excluded from the target period. This allows the determination unit 24 to accurately specify the target period for determining whether or not a person is present in the building 60. Furthermore, when the second information is received within the target period, the determination unit 24 determines that a person is present in the building 60. Thus, the determination system 20 can determine whether or not a person is present in the building 60.

[0146] Invention 15 is a program for causing a computer system to execute the determination method of Invention 14.

[0147] With this configuration, when the first information is received twice within a predetermined time, the determination unit 24 regards it as a single reception of the first information, and therefore the period during which the door 61 is opened and closed can be excluded from the target period. This allows the determination unit 24 to accurately specify the target period for determining whether or not a person is present in the building 60. Furthermore, when the second information is received within the target period, the determination unit 24 determines that a person is present in the building 60. Thus, the determination system 20 can determine whether or not a person is present in the building 60.

[0148] (Modification) Although the determination system according to one or more aspects has been described based on the above embodiment, the present disclosure is not limited to the above embodiment. As long as it does not deviate from the gist of the present disclosure, various modifications conceived by a person skilled in the art to the above embodiment and forms constructed by combining components in different embodiments may also be included within the scope of one or more aspects.

[0149] For example, in the above embodiment, each component may be configured with dedicated hardware, or may be realized by executing a software program suitable for each component. Each component may be realized by a program execution unit such as a CPU or a processor reading and executing a software program stored in a recording medium such as a hard disk or a semiconductor memory.

[0150] Furthermore, some or all of the functions of the determination system according to the above-described embodiment may be realized by a processor such as a CPU executing a program.

[0151] Some or all of the components constituting each of the above devices may be composed of an IC card or a standalone module that can be attached to each device. The above IC card or module is a computer system composed of a microprocessor, ROM, RAM, etc. The above IC card or module may include a super multi-function LSI. The above IC card or module achieves its functions by the microprocessor operating according to a computer program. This IC card or module may be tamper-resistant.

[0152] In addition, the determination system of the above embodiment may be realized by a plurality of devices or a single device. When the determination system is realized by a plurality of devices, the components (particularly functional components) of the determination system may be distributed among the plurality of devices in any manner.

[0153] In addition, the general or specific aspects of the present disclosure may be realized in a system, an apparatus, a method, an integrated circuit, a computer program, or a computer-readable recording medium such as a CD-ROM, or may be realized in any combination of a system, an apparatus, a method, an integrated circuit, a computer program, and a recording medium.

[0154] For example, the present disclosure may be realized as a determination method executed by a computer such as the determination system of the above-described embodiment, or as a program for causing a computer to execute the determination method. Furthermore, the present invention may be realized as a computer-readable non-transitory recording medium having such a program recorded thereon. [Explanation of symbols]

[0155] 11 Entrance door sensor (sensor) 20 Judging System 21 Communications Department 24 Judgment section 25 Calculation section 26 Output section 60 Building 61 Door 62 Entrance (Entrance) 100 First terminal device (terminal device) 103 Display section

Claims

1. a communication unit that receives first information indicating a detection result of a sensor that detects opening and closing of a door installed at an entrance of a building, and receives second information that directly or indirectly indicates the presence of a person in the building; a determination unit that determines whether or not the person is present in the building based on the received first information and the received second information; an output unit that outputs determination result information indicating a result of the determination by the determination unit; The determination unit is When the second information is received within a target period from one reception of the first information to another reception of the first information, it is determined that the person is present in the building during the target period; When the time that has elapsed since the first information was received until another piece of the first information was received is within a predetermined time, a process is performed in which the reception of the first information twice is regarded as a single reception of the first information. Judging system.

2. the determination unit performs a process of regarding three receptions of the first information as one reception of the first information when a time elapsed from the reception of the first information to the reception of the other first information is within the predetermined time and a time elapsed from the reception of the other first information to the reception of the further other first information is within the predetermined time. The determination system according to claim 1 .

3. the determination unit, when the time that has elapsed from when the first information is received until when the other first information is received is within the predetermined time, and the time that has elapsed between when two pieces of the first information that follow the first information are received is within the predetermined time, performs a process of regarding the period from the reception of the first information to the reception of the last piece of the first information as one reception of the first information during the period that is determined to be within the predetermined time. The determination system according to claim 1 .

4. the determination unit determines that the person is present in the building during the target period, and when the second information is not received within a first target period immediately following the target period, determines that the person is absent from the building during the first target period. The determination system according to claim 1 .

5. The determination unit further determines that the person is present in the building during the second target period when the second information is not received during a second target period immediately following the first target period. The determination system according to claim 4 .

6. the determination unit determines that the person is present in the building during the target period, and when the second information is not received within a third target period immediately preceding the target period, determines that the person is absent from the building during the third target period. The determination system according to any one of claims 1 to 5.

7. The determination unit is If the second information is not received within a fourth target period immediately preceding the third target period, it is determined that the person is absent from the building during the fourth target period; When the second information is not received during the third target period following the fourth target period, it is determined that the person is present in the building during the third target period; When it is determined that the person is present in the building during the target period, the result of the determination during the third target period is changed from "present" to "absent." The determination system according to claim 6.

8. The determination unit associates a level indicating the accuracy of the determination with the result of the determination. The determination system according to claim 1 .

9. The second information is information indicating a detection result of a sensor that detects opening and closing of a door installed in the building. The determination system according to claim 1 .

10. The second information is electricity usage information indicating electricity usage measured in the building. The determination system according to claim 1 .

11. Further, a calculation unit is provided that calculates the number of times and the duration of time that the person goes out using the result of the determination by the determination unit, The output unit outputs third information regarding the number of times and the time when the person goes out, which is calculated by the calculation unit. The determination system according to claim 1 .

12. The third information includes recommendation information according to the number of times and the time when the person went out, which are calculated by the calculation unit. The determination system according to claim 11.

13. The output unit outputs the determination result information to a terminal device owned by a monitor who watches over the safety of the person, a display unit of the terminal device that has acquired the determination result information displays the determination result information on whether or not the person is present in the building in real time. The determination system according to claim 1 .

14. A method of determining whether a computer system is capable of detecting a plurality of different types of errors, comprising: a communication step of receiving first information indicating a detection result of a sensor that detects opening and closing of a door installed at an entrance of a building, and receiving second information that directly or indirectly indicates the presence of a person in the building; a determination step of determining whether or not the person is present in the building based on the received first information and the received second information; and outputting determination result information indicating a result of the determination in the determination step, In the determination step, When the second information is received within a target period from one reception of the first information to another reception of the first information, it is determined that the person is present in the building during the target period; When the time that has elapsed since the first information was received until another piece of the first information was received is within a predetermined time, a process is performed in which the reception of the first information twice is regarded as a single reception of the first information. Judgment method.

15. A program for causing a computer system to execute the determination method according to claim 14.

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