Indoor situation confirmation system

Abstract

The present invention provides an indoor situation confirmation system that can accurately detect the presence or absence of people indoors. [Solution] The indoor situation confirmation system is equipped with a measurement terminal and an information processing terminal, in which the measurement terminal transmits ambient carbon dioxide concentration values ​​for each measurement period Δt, and the information processing terminal stores the concentration values ​​transmitted for each measurement period Δt in chronological order as a concentration history, and performs an alarm operation when one concentration value included in the concentration history is a first concentration history value c1 and a value calculated based on at least one concentration value in the concentration history prior to the first concentration history value c1 is a second concentration history value c2, where Δc=c1-c2, which is the difference between the first concentration history value c1 and the second concentration history value c2, is equal to or greater than a threshold value C.

Description

[Technical field]

[0001] The present invention relates to a system for checking an indoor situation. [Background technology]

[0002] Conventionally, there is known a technology for monitoring the presence / absence or safety of residents of a house (see, for example, Patent Document 1). According to this technology, "the system includes a sensor information acquisition unit that receives information indicating that the person being watched over is in the living room or information indicating that the person being watched over is not in the living room from a sensor installed in the living room of the person being watched over, a setting unit that sets, for each watcher, a timing for notifying multiple watchers of information explaining the state of the person being watched over based on the information received by the sensor information acquisition unit, and an information notification unit that notifies the terminal devices of the multiple watchers of the information explaining the state at the set timing." [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-099667 Summary of the Invention [Problem to be solved by the invention]

[0004] The monitoring device disclosed in Patent Document 1 specifically detects the presence or absence of people using a camera or by sensing heat, but has the problem that the detection accuracy is low when there are obstacles such as partitions or furniture in the room.

[0005] An object of the present invention is to provide an indoor situation confirmation system capable of detecting the presence or absence of people indoors with high accuracy. [Means for solving the problem]

[0006] The indoor situation confirmation system of the present invention is an indoor situation confirmation system comprising a measurement terminal and an information processing terminal, wherein the measurement terminal transmits ambient carbon dioxide concentration values ​​for each measurement period Δt, and the information processing terminal stores the concentration values ​​transmitted for each measurement period Δt in chronological order as a concentration history, and when one of the concentration values ​​included in the concentration history is defined as a first concentration history value c1 and a value calculated based on at least one of the concentration values ​​in the concentration history prior to the first concentration history value c1 is defined as a second concentration history value c2, an alarm operation is performed when the difference between the first concentration history value c1 and the second concentration history value c2, Δc=c1-c2, is equal to or greater than a threshold value C. Effect of the Invention

[0007] According to the indoor situation confirmation system of the present invention, the presence or absence of people in a room is confirmed by detecting the concentration of carbon dioxide, so that a decrease in the accuracy of confirmation of the presence or absence of people can be suppressed even if there is an obstruction. [Brief description of the drawings]

[0008] [Figure 1] 1 is an explanatory diagram of the overall configuration of an indoor situation confirmation system 100 according to a first embodiment. [Diagram 2] FIG. 2 is an explanatory diagram of an installation state of the measurement terminal 20 shown in FIG. [Diagram 3] 1 is a hardware configuration diagram of a server 10 or an individual terminal 30 which is an information processing terminal according to the first embodiment. [Figure 4] FIG. 2 is an explanatory diagram of basic information processing of the indoor situation confirmation system 100 according to the first embodiment. [Diagram 5] 2 is an example of measurement data of carbon dioxide concentration by the indoor situation monitoring system 100 according to the first embodiment. [Figure 6] 1 shows an example of a process flow in which the indoor situation confirmation system 100 according to the first embodiment notifies that a person has entered the room 60. [Figure 7] 1 is a diagram showing an example of a processing flow in which the indoor situation confirmation system 100 according to the first embodiment notifies a user that he or she is absent for a long period of time in the room 60. FIG. [Figure 8] 1 shows an example of a process flow in which the indoor situation confirmation system 100 according to the first embodiment notifies the user that the user is absent from the room 60 for a long period of time. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Preferred embodiments of the indoor situation confirmation system of the present invention are described in detail below with reference to the drawings. Note that the embodiments described below are preferred specific examples of the present invention, and therefore various technically preferable limitations are attached, but the scope of the present invention is not limited to these aspects unless otherwise specified in the following description to the effect that the present invention is limited.

[0010] Embodiment 1 Fig. 1 is an explanatory diagram of the overall configuration of an indoor situation confirmation system 100 according to the first embodiment. Fig. 2 is an explanatory diagram of an installation state of a measuring terminal 20 described in Fig. 1. The indoor situation confirmation system 100 is a system for confirming the presence or absence of a person in a room 60 of, for example, a residence. An example will be described in which the indoor situation confirmation system 100 according to the first embodiment is configured by connecting a server 10, a measuring terminal 20, and an individual terminal 30 owned by a user via a network 90.

[0011] The network 90 serves to connect the server 10, the measurement terminals 20, and the individual terminals 30. The network 90 is a communication network that connects the server 10, the measurement terminals 20, and the individual terminals 30 and establishes connection paths to enable data transmission and reception. At least a portion of the network 90 may be a wired network or a wireless network. The network 90 may also be an IP (Internet Protocol) network. Network 90 may include, for example, an intranet, an extranet, a virtual private network (VPN), a local area network (LAN), a wireless LAN (WLAN), a wide area network (WAN), a wireless WAN (WWAN), an ad hoc network, a metropolitan area network (MAN), a portion of the Internet, a portion of the Public Switched Telephone Network (PSTN), a mobile phone network, integrated service digital networks (ISDN), wireless LAN, long term evolution (LTE), code division multiple access (CDMA), Bluetooth (registered trademark), satellite communications, or a combination of two or more of these, enabling communication between terminals.

[0012] The server 10 has a function of processing information transmitted from the measurement terminal 20 and providing the information to the individual terminal 30. The server 10 may be any information processing device capable of implementing the functions described in each embodiment. The server 10 may include, for example, a server computer, a personal computer (desktop, laptop, tablet, etc.), a media computer platform (cable, satellite set-top box, digital video recorder), a handheld computer device (PDA, email client, etc.), or other types of computers. The server 10 may also be referred to as an information processing terminal.

[0013] 2, and is installed, for example, in an outlet 62 in a room 60. The measurement terminal 20 includes a control unit 21, a storage unit 22, a communication unit 25, and a measurement unit 26 inside a housing 28, and is configured to be able to communicate with the server 10 or the individual terminal 30 via a network 90. ​​However, the measurement terminal 20 may not be provided with some of the control unit 21, the storage unit 22, the communication unit 25, and the measurement unit 26.

[0014] The measurement terminal 20 includes a plurality of measurement terminals 20a, 20b, and 20c. The plurality of measurement terminals 20a, 20b, and 20c are installed in rooms 60a, 60b, and 60c, respectively, in which the indoor conditions are to be confirmed. The plurality of measurement terminals 20a, 20b, and 20c are each registered in the server 10 so as to be identifiable, and information measured by each of them is transmitted to the server 10.

[0015] The individual terminal 30 is a terminal that is mainly owned by a user who uses the indoor situation confirmation system 100, and can receive information from the server 10 or the measurement terminal 20 via the network 90, and can confirm the situation of the room 60 in which the measurement terminal 20 is installed. Specifically, the individual terminal 30 includes a mobile information terminal such as a smartphone or tablet owned by the user, a personal computer owned by the user, an information terminal using a display device such as a television, a landline telephone, etc. Note that the individual terminal 30 may be configured to receive information from the measurement terminal 20 without going through the server 10. In other words, the server 10 and the individual terminal 30 may be configured functionally as one unit. Also, the individual terminal 30 may be expressed as an information processing terminal.

[0016] (Measuring terminal 20) As shown in FIG. 2, the measurement terminal 20 according to the first embodiment is a terminal that is used by being plugged into a socket 62 in a room 60. The measurement terminal 20 includes a measurement unit 26 inside a housing 28. The measurement unit 26 is a module for measuring the carbon dioxide concentration, temperature, and humidity of the air in the surrounding environment. The data measured by the measurement unit 26 is transmitted from the communication unit 25 to the server 10 via a network 90. ​​The measurement terminal 20 according to the first embodiment includes, for example, a SIM card 23, and is capable of transmitting information to the server 10 via a line of a communication connection carrier. Therefore, the measurement terminal 20 can be installed in a communicable manner in any area in Japan where people live. However, the configuration of the measurement terminal 20 is not limited to the above, and may be other configurations as long as it can transmit measured data. The room 60 in which the measurement terminal 20 is installed is not limited to a residence, but may be any partitioned space into which people enter, including, for example, the interior of a car. In addition, the measurement terminal 20 is not limited to being powered by a socket, and other forms of power supply are also acceptable.

[0017] The measurement terminal 20 may further include a control unit 21, a storage unit 22, and a display unit 24. The control unit 21 processes data measured by the measurement unit 26, stores the data in the storage unit 22, and causes the display unit 24 to display the data as information. As shown in FIG. 2(a), the display unit 24 displays data on the front surface of the housing 28, and includes a carbon dioxide concentration display unit 24a, a temperature display unit 24b, and a humidity display unit 24c. The carbon dioxide concentration display unit 24a, the temperature display unit 24b, and the humidity display unit 24c display, for example, the most recent measured value measured by the measurement unit 26. However, the display contents can be changed as appropriate.

[0018] The measuring terminal 20 is provided with a plug 27a that can be inserted into a power outlet 62 on the back of a roughly rectangular parallelepiped housing 28. Power is supplied to each part of the measuring terminal 20 from the plug 27a via the power supply unit 27. The measuring terminal 20 has a structure in which the housing 28 is directly attached to the power outlet 62, so it can be installed in any room 60 of a building, residence, etc. that is supplied with power. Since the measuring terminal 20 measures the concentration of carbon dioxide in the air of the room 60, it is convenient to detect carbon dioxide, which has a high specific gravity compared to air, when the measuring terminal 20 is installed by inserting it into a power outlet 62 provided in a position close to the floor of the room 60. However, the measuring terminal 20 can be installed anywhere and can notify entry and long-term absence, which will be described later.

[0019] The measurement terminal 20 has a detection hole 26a on the front. The detection hole 26a is configured so that the internal structure cannot be seen by a front plate 26b provided on the inside of the housing, and a slit 26c is provided on the side so that air can reach the sensor of the measurement unit 26. The sensor installed in the measurement unit 26 is preferably installed in a position where it is not directly irradiated with light from the outside and is not directly hit by the flow of external air. However, from the viewpoint of improving the output accuracy, it is desirable that the sensor is installed as close as possible to the outer surface of the housing 28, and the opening through which the air flows in has as large an area as possible. As shown in Figures 2(a) and (b), the front plate 26b is installed in front of the opening of the detection hole 26a, and the front plate 26b is arranged so as to cover the opening from the inside of the housing 28. A slit 26c is formed between the front plate 26b and the outer shell 28a of the housing 28, and the air that enters from the detection hole 26a hits the front plate 26b and enters the inside of the housing 28 from the slit 26c on the side. This prevents the air flow from directly hitting the sensor of the measurement unit 26, and ensures that sufficient air is supplied to the sensor on the internal measurement unit 26.

[0020] Also, it is desirable that the sensor of measuring section 26 is disposed at a position away from power supply unit 27. In the first embodiment, plug 27a inserted into outlet 62 is disposed above the center in the vertical direction of housing 28, and therefore detection hole 26a is desirably disposed below the center in the vertical direction of housing 28. In other words, plug 27a and detection hole 26a are desirably disposed at a distance from each other across the center in the vertical direction of housing 28.

[0021] (Server 10 and individual terminal 30) FIG. 3 is a hardware configuration diagram of the server 10 or the individual terminal 30 which is an information processing terminal according to the first embodiment. The server 10 and the individual terminal 30 which are information processing terminals include a control unit 51, a storage unit 52, and a communication unit 53. The control unit 51 is, for example, a CPU (Central Processing Unit). The control unit 51 may also include a ROM (Read Only Memory) and a RAM (Random Access Memory). The CPU is also called a central processing unit, a central arithmetic unit, a processor, a microprocessor, a microcomputer, or a DSP (Digital Signal Processor). In the information processing terminal, the CPU reads out the programs and data stored in the ROM, and uses the RAM as a work area to centrally control each information processing terminal. The CPU controls communication between the information processing terminals by the communication unit 53 based on information stored in the storage unit 52 such as the ROM and the RAM, and the contents displayed on the output unit 55 such as a display device and a printer. In addition, when the information processing terminal has a hardware configuration as shown in FIG. 2(b), the control unit 51 controls the contents displayed on the output unit 55 such as a display device and a printer based on the contents input by the user via the input unit 54, and also controls various functions such as recognizing the contents input by the user via the input unit 54 and storing information in the memory unit 52.

[0022] The control unit 51 may realize each process not only by a CPU having a control circuit, but also by a logic circuit (hardware) formed in an integrated circuit (IC (Integrated Circuit) chip, LSI (Large Scale Integration)) or a dedicated circuit.

[0023] The storage unit 52 is, for example, a non-volatile semiconductor memory such as a flash memory, an EPROM (Erasable Programmable ROM), an EEPROM (Electrically Erasable Programmable ROM), or an HDD (Hard disk drive), and serves as a so-called secondary storage device. In the first embodiment, the storage unit 52 may be installed in the terminal, or may be a server connected via the network 90. ​​The storage unit 52 is not necessarily installed in the terminal, but may be installed on the network 90 so as to be communicable therewith, and may be referred to as the storage unit 52 including the network 90. ​​That is, the control unit 51 can call up information from a communicable storage device including the storage unit 52 installed in the terminal or the storage unit 52 connected to the network 90. ​​The control unit 51 also calls up information required for displaying on the display device from the storage unit 52 as appropriate. The storage unit 52 can also store user response information via the input unit 54.

[0024] The communication unit 53 is a part that transmits and receives various data via the network 90, and may use any communication protocol, whether wired or wireless, as long as communication between each information processing device can be performed. The communication unit 53 has a function of performing communication between each information processing device via the network 90. ​​The communication unit 53 transmits various data to other information processing devices based on instructions from the control unit 51. The communication unit 53 also receives various data from other information processing devices and sends it to the control unit 51.

[0025] The control unit 51, the storage unit 52, and the communication unit 53 of the server 10 in the indoor situation confirmation system 100 may be configured in any form. For example, when the server 10 is formed as a network computer system consisting of multiple server computers, each function may be distributed and arranged in the multiple server computers. Furthermore, these server computers may be arranged across computer systems owned by multiple vendors and server administrators (for example, computer systems owned or managed by other information providers, providers, hosting system providers, etc.). The server computer may be formed as a so-called cloud computer system. Furthermore, at least a part of the configuration of the control unit 51, the storage unit 52, and the communication unit 53 may be provided in a client terminal constituting the indoor situation confirmation system 100. The server 10 may further include an input unit 54, an output unit 55, etc., as shown in FIG. 3(b), and each function may be distributed and arranged in multiple server computers.

[0026] (30 individual terminals) The individual terminal 30 is mainly used by a user of the indoor situation confirmation system 100 to confirm the indoor situation measured by the measuring terminal 20, or to receive a notification under certain conditions. As shown in FIG. 3(b), the individual terminal 30 includes a control unit 51, a storage unit 52, a communication unit 53, an input unit 54, and an output unit 55. The individual terminal 30 is a fixed terminal such as a mobile information terminal or a personal computer, and can display numerical data measured by the measuring terminal 20, data in which the fluctuation of numerical values ​​is visualized by a graph, and the like on a display device corresponding to the output unit 55 using an installed dedicated application or a web browser. When it is not necessary to confirm the measured values ​​and only a notification is required, the individual terminal 30 may be a fixed telephone, an intercom, or a buzzer that notifies using visual information such as voice or text information.

[0027] A user can operate the individual terminal 30 using the input unit 54 and operate the settings of the indoor situation confirmation system 100 using an installed dedicated application or a web browser. For example, by operating the individual terminal 30, in a situation where no one is present in the room 60a in which the measuring terminal 20a is installed, the user can switch the indoor situation confirmation system 100 to an out-of-room mode for the measuring terminal 20a as necessary. In addition, in a situation where a person is present in the room 60a in which the measuring terminal 20a is installed or is entering and leaving the room, the indoor situation confirmation system 100 can be switched to an in-room mode for the measuring terminal 20a. The indoor situation confirmation system 100 can switch whether or not to perform a notification operation based on a determination based on the measurement data according to the mode set by the user. In addition, the user can operate the individual terminal 30 to check the measurement data of each measuring terminal 20 and download the measurement data to the individual terminal 30.

[0028] The operations performed by the user using the individual terminal 30 can also be performed by the server 10. In other words, the server 10 can also function as the individual terminal 30, and the individual terminal 30 may also function as the server 10.

[0029] The server 10, the measuring terminal 20, and the individual terminal 30 may read out a program stored in a storage medium and execute the read out program to realize the functions of the multiple functional units shown in the embodiment.

[0030] Furthermore, the programs for realizing the functions of the indoor situation confirmation system 100 according to the first embodiment may or may not be provided to the server 10, the measuring terminal 20, and the individual terminal 30 via any transmission medium capable of transmitting the programs (such as a communication network or broadcast waves). The server 10, the measuring terminal 20, and the individual terminal 30 execute programs downloaded via the Internet, for example, to realize the functions of the multiple functional units shown in each embodiment.

[0031] The indoor situation confirmation system 100 according to the first embodiment may also be realized in the form of a data signal embedded in a carrier wave, in which the program is embodied by electronic transmission. At least a part of the processing in the server 10, the measuring terminal 20, and the individual terminal 30 may or may not be realized by cloud computing consisting of one or more computers.

[0032] At least a part of the processing in the measuring terminal 20 may or may not be configured to be performed by the server 10. In this case, at least a part of the processing of each functional unit of the control unit 51 of the measuring terminal 20 may or may not be configured to be performed by the server 10.

[0033] Also, at least a part of the processing in the server 10 may or may not be configured to be performed by the measurement terminal 20. In this case, at least a part of the processing of each functional unit of the control unit 51 of the server 10 may or may not be configured to be performed by the measurement terminal 20.

[0034] Unless explicitly stated, the judgment configuration in embodiment 1 is not essential, and a specified process may or may not be performed when the judgment condition is satisfied, or a specified process may or may not be performed when the judgment condition is not satisfied.

[0035] The programs disclosed herein are implemented using, for example, scripting languages ​​such as JavaScript (registered trademark) and Python (registered trademark), object-oriented programming languages ​​such as Java (registered trademark), markup languages ​​such as HTML5, and functional programming languages ​​such as Erlang.

[0036] The following describes an example of information processing according to the embodiment 1. In the following description, for each component of the indoor situation confirmation system 100, reference will be made to Figs. 1 to 3 as appropriate.

[0037] <Outline of information processing in the indoor situation confirmation system 100> Fig. 4 is an explanatory diagram of basic information processing of the indoor situation confirmation system 100 according to the embodiment 1. In Fig. 4, the indoor situation confirmation system 100 displays, as a graph in time series, data on carbon dioxide concentration measured by the measuring terminals 20 installed by users in the rooms 60. In the graph in Fig. 4, the horizontal axis represents time, and the vertical axis represents carbon dioxide concentration [ppm].

[0038] The measurement terminal 20 is installed in a room 60 and measures the carbon dioxide concentration, temperature, and humidity of the surrounding air. In Fig. 4, only the carbon dioxide concentration [ppm] is displayed, but the temperature and humidity can also be displayed. The graph in Fig. 4 is displayed on a display device provided in the individual terminal 30, for example.

[0039] The concentration values ​​measured by the measurement terminal 20 are stored in the server 10 as a time-series concentration history. That is, the concentration values ​​are measured and stored in the measurement terminal 20 at intervals of a certain measurement period Δt. The concentration values ​​are specifically stored in the storage unit 22 of the measurement terminal 20. Alternatively, the concentration value data is transmitted from the communication unit 25 to the server 10 via the network 90. ​​The concentration value data is transmitted to the server 10 together with measurement time data, and is accumulated in the server 10 as a time-series concentration history.

[0040] The curve h in the graph shown in FIG. 4 is a straight line connecting the concentration values ​​plotted at each time when the measurement terminal 20 measured. Therefore, the curve h has points plotted for each measurement period Δt, and is displayed as a broken line connecting the points with straight lines. In FIG. 4, the concentration values ​​at times t1, t2, t3, and t4 are measured and plotted. A collection of these concentration values ​​is stored in the storage unit 52 of the server 10 as a concentration history. The indoor situation confirmation system 100 can confirm whether a person is present in the room 60, whether a person has entered the room, or whether the person is absent for a long time by using the multiple concentration values ​​included in these concentration histories. As shown in FIG. 4, the concentration value is basically recorded together with the time when it was measured by the measurement terminal 20, and is displayed on the individual terminal 30, and an entry notification and a long absence notification are performed, but the time associated with the concentration value may be, for example, the time when the measurement terminal 20 transmits the concentration value data, or the time when an information processing terminal such as the server 10 receives the data.

[0041] 4, the measuring terminal 20 starts measuring the carbon dioxide concentration from a certain time t0, and transmits concentration value data to the server 10 for each measurement period Δt. The concentration value does not fluctuate significantly from time t0, and does not fluctuate significantly until time t3, but increases relatively significantly from time t3 to time t4. In this case, it is highly likely that a person has entered the room 60, and the indoor situation confirmation system 100 can notify the user that a person has entered the room 60.

[0042] Fig. 5 is an example of measurement data of carbon dioxide concentration by the indoor condition confirmation system 100 according to the embodiment 1. The measurement data shown in Fig. 5 shows, as an example, the measurement results of carbon dioxide concentration in a certain room 60 from February 2 to February 5.

[0043] The fluctuation of the concentration value in section P in FIG. 5 indicates a case where a person is present in the room 60 and is active, or a plurality of people are entering and leaving the room 60.

[0044] Section Q in FIG. 5 shows a state in which no one is in the room 60 after the state of section P, and the carbon dioxide concentration gradually decreases.

[0045] Section R in FIG. 5 indicates a steady state in which the carbon dioxide concentration has decreased when the room 60 is unoccupied.

[0046] 5 shows a state in which the room 60 is unoccupied and someone has entered an adjacent room or a corridor and then left the room. For example, the concentration level increases more slowly than the increase and decrease in the concentration level in the section P and the like.

[0047] Section T in FIG. 5 shows a state in which room 60 is empty and people in the adjacent rooms or the corridor have left the room, leaving the surrounding area empty.

[0048] Section U in FIG. 5 indicates a state in which people have entered the room 60 and are active, with multiple people entering and leaving.

[0049] As shown in sections P and Q in FIG. 5, when there is a person in the room 60, the carbon dioxide concentration value is higher than in a stationary state where no one is present (for example, section R), and the concentration value fluctuates significantly.

[0050] On the other hand, when no one is present in the room 60, the carbon dioxide concentration value either gradually decreases as shown in sections Q and T, or fluctuates with little fluctuation as shown in section R.

[0051] As described above, the indoor situation confirmation system 100 according to embodiment 1 is configured to record carbon dioxide concentration values ​​in chronological order using the measuring terminal 20 installed in the room 60, and to display the values ​​on a display device of the individual terminal 30, for example, so that the user can determine the situation in the room 60, such as the presence or absence of people therein.

[0052] Generally, the carbon dioxide concentration in the atmosphere is about 400 ppm, and when the room 60 is unoccupied and in a steady state, it fluctuates around this value, with no significant increase or decrease in value. On the other hand, when someone enters the room 60, the carbon dioxide concentration increases rapidly in a short period of time, as shown in section U of Fig. 5. The indoor situation confirmation system 100 according to the first embodiment uses these fluctuations in the carbon dioxide concentration value to confirm the situation in the room 60.

[0053] (Entry notification) FIG. 6 shows an example of a process flow in which the indoor situation confirmation system 100 according to the first embodiment notifies that a person has entered the room 60. The indoor situation confirmation system 100 can be set to either an absent mode in which no person is present in the room 60 or a present mode in which a person is present, by a user operating the individual terminal 30 (step S1). In the present mode (No in step S1), the indoor situation confirmation system 100 does not notify entry, measures a normal carbon dioxide concentration value, and continues recording the concentration history. In the absent mode (Yes in step S1), the indoor situation confirmation system 100 determines whether to notify entry based on the latest concentration value and concentration history acquired from the measurement terminal 20. In the absent mode, the indoor situation confirmation system 100 processes the carbon dioxide concentration value measured by the measurement terminal 20 in the server 10, which is an information processing terminal, and detects and notifies that a person has entered the room 60 under a predetermined condition.

[0054] First, the measurement terminal 20 transmits the carbon dioxide concentration value measured at an interval of the measurement period Δt to the server 10. The server 10 sets the received carbon dioxide concentration value as the first concentration history value c1 (step S2), sets the carbon dioxide concentration value acquired at a time a predetermined comparison period ΔT before as the second concentration history value c2 (step S3), and calculates the difference between them Δc=c1-c2 (step S4). Here, the first concentration history value c1 is the carbon dioxide concentration value at the latest time t, and indicates the state of the room 60 at the latest time t. For example, in the graph shown in FIG. 4, the first concentration history value c1 is the first concentration history value c1b acquired at the latest time t4, and the second concentration history value c2 is the second concentration history value c2b acquired by the server 10 at a time ΔT before the time t4.

[0055] If the difference Δc = Δc1 - Δc2 of the concentration history values ​​at the latest time t is less than a certain threshold C (No in step S4), the indoor condition monitoring system 100 does not perform an alarm operation and further acquires the next first concentration history value c1 after the measurement period Δt (return to step S2).

[0056] If the difference Δc=Δc1−Δc2 of the concentration history values ​​at time t4 is equal to or greater than a certain threshold C (Yes in step S4), the indoor condition confirmation system 100 performs a reporting operation (step S5).

[0057] The indoor situation confirmation system 100 may terminate information processing after performing the notification operation, or may obtain a new first concentration history value c1 after a measurement period Δt and perform a new notification operation if the condition is met. Alternatively, the indoor situation confirmation system 100 may be set not to perform a notification operation until a predetermined time has elapsed after performing a notification operation once, even if the new first concentration history value c1 and second concentration history value c2 meet the condition that Δc>C.

[0058] If there is no second concentration history value c2 corresponding to the first concentration history value c1 that is the comparison period ΔT before, the indoor situation confirmation system 100 may use the latest concentration history value among the concentration history values ​​that are more than the comparison period ΔT before to determine the difference Δc and make the determination. That is, the indoor situation confirmation system 100 may acquire one concentration value that is more than the comparison period ΔT before the first concentration history value c1 as the second concentration history value c2. In this case, for example, the latest concentration value among the concentration values ​​before the comparison period ΔT may be set to treat the concentration value measured at a time within a range of less than ΔT+Δt from the time t at which the first concentration history value c1 was measured as the second concentration history value, and not to target the others.

[0059] Measurements at the measurement terminal 20 and communications between the measurement terminal 20 and the server 10 are not performed at exactly the same time intervals, and some errors may occur. In this case, even if an attempt is made to obtain a concentration history value exactly the comparison period ΔT before as the second concentration history value c2, there may be cases where the data does not exist. In such a case, as an example, a concentration value measured at a time within a range of less than ΔT+Δt from the time t at which the first concentration history value c1 was measured may be treated as the second concentration history value. Alternatively, a concentration value existing within a range of ΔT±x from the time t at which the first concentration history value c1 was measured may be set as the second concentration history value c2. In this case, x may be appropriately set within a range of values ​​sufficiently smaller than ΔT, taking into account measurement and transmission errors. In other words, when the comparison period ΔT is specifically set as a numerical value, it may include an error.

[0060] The information processing of FIG. 6 will be explained based on the example of FIG. 4. For example, in the case where the time t3 in FIG. 4 is the latest time, if the difference between the concentration values ​​is small, such as Δca=Δc1a-Δc2a, the indoor situation confirmation system 100 does not perform a notification operation, since it is determined that no person has entered the room 60 (No in step S4). Then, the indoor situation confirmation system 100 acquires a new first concentration history value c1b at the next time t4 after the measurement period Δt (return to step S2). As shown in FIG. 4, the difference Δcb=Δc1b-Δc2b between the first concentration history value c1b acquired at time t4 and the second concentration history value c2b acquired ΔT before time t4 is larger than the difference Δca determined previously. If the difference Δcb is equal to or greater than the threshold C, the indoor situation confirmation system 100 determines that a person has entered the room 60, and the indoor situation confirmation system 100 notifies the user.

[0061] The measuring terminal 20 continues the measurement in the room 60 regardless of the notification operation. The indoor situation confirmation system 100 may perform a further notification operation if the condition of step S4 is met at a new time t5 after the notification operation, or may be set not to perform a notification operation until a predetermined time has elapsed.

[0062] As an example of the entry notification, the indoor situation confirmation system 100 sets the measurement period Δt to 1 [min] ≦ Δt < 20 [min], the comparison period ΔT to 10 [min] ≦ ΔT ≦ 30 [min], and the threshold C for determining the difference Δc between the first concentration history value c1 and the second concentration history value c2 to 20 [ppm] ≦ C ≦ 50 [ppm]. However, Δt < ΔT. In this case, the room 60 in which the measurement terminal 20 is installed ranges from a room with an area of ​​about 1 tatami mat such as a toilet to a room with an area of ​​132 m², and the ceiling height is a standard 210 cm to 250 cm. However, the value for the area of ​​the room 60 is an example, and the entry notification can be determined without any problem if the room 60 is small. Also, if the room 60 is large, the sensitivity of the entry notification can be increased by setting the threshold C low. The above values ​​of Δt, ΔT, and C are not limited to these values, but are conditions under which entry notification can be suitably performed in rooms ranging from about 1 tatami mat in size to 132 square meters in size. These values ​​may be adjusted appropriately according to the volume of room 60, but more preferably, Δt≦5 [min], ΔT≧20 [min], and C≦35 [ppm].

[0063] In addition, Figure 5 shows an area of ​​21 m2 with one door installed. 2 This is an example of the measurement result of the carbon dioxide concentration in a room 60 having an area of ​​6.35 tsubo (13 tatami mats) and a ceiling height of 2.5 m. The room 60 has no windows and is constantly ventilated with a ventilator. In this example, the threshold C is set to 35 [ppm] and the comparison period ΔT is set to 20 [min]. In this example, if the absence mode is set in the section Q to section U, the indoor situation confirmation system 100 will perform an alarm operation at points X1 and X2 where the concentration value has increased. Note that by adjusting the threshold C, it can also be set to perform an alarm operation only at point X2.

[0064] (Long-term absence notification No. 1) FIG. 7 is a diagram showing an example of a process flow in which the indoor situation confirmation system 100 according to the first embodiment notifies the user that the room 60 is absent for a long time. The indoor situation confirmation system 100 determines whether the room 60 is in an absent mode in which no one is present or in a present mode in which a person is present, by a user operating an individual terminal (step S6). If the room 60 is in the absent mode (No in step S6), the indoor situation confirmation system 100 does not notify the user of the long time absence, but measures a normal carbon dioxide concentration value and continues recording the concentration history. If the room 50 is in the present mode (Yes in step S6), the indoor situation confirmation system 100 determines whether to notify the user of the long time absence based on the latest concentration value and concentration history acquired from the measurement terminal 20. In the present mode, the indoor situation confirmation system 100 processes the carbon dioxide concentration value measured by the measurement terminal 20 in the server 10, which is an information processing terminal, and detects that a person is absent for a long time in the room 60 under a predetermined condition. Specifically, the indoor situation confirmation system 100 notifies the user that no one is present in the room 50 for more than the evaluation period ΔD. The evaluation period ΔD is set to, for example, 24 hours, but can be changed as appropriate. The time count starts when the mode is switched to the presence mode in step S6, and the indoor situation confirmation system 100 determines whether the evaluation period ΔD has elapsed.

[0065] First, the measurement terminal 20 transmits the carbon dioxide concentration value measured at an interval of the measurement period Δt to the server 10. The server 10 regards the received carbon dioxide concentration value as the first concentration history value c1, and the carbon dioxide concentration value acquired at a time a predetermined comparison period ΔT before as the second concentration history value c2, and calculates the difference between them Δc=c1-c2. If the difference Δc is equal to or greater than the threshold C, it is stored (step S7). Here, the first concentration history value c1 is the carbon dioxide concentration value at the latest time t, and indicates the latest state of the room 60. The indoor situation confirmation system 100 calculates the difference Δc for each measurement period Δt, and if it is equal to or greater than the threshold C, it stores the time t, or stores the fact that it is equal to or greater than the threshold C. However, in the case of a long-term absence notification, since the indoor situation confirmation system 100 is installed in the presence mode, an entry notification is not performed. Then, the indoor situation confirmation system 100 resets the count of the time to be compared with the evaluation period ΔD.

[0066] Next, it is determined whether the latest time t has exceeded the evaluation period ΔD since the occupancy mode was set, or since the time the occupancy mode was set and the difference Δc=c1-c2 in the concentration history values ​​last became equal to or greater than the threshold C (step S8). If the time t has not exceeded the evaluation period ΔD since the start of counting, recording of the concentration history values ​​continues (No in step S8). If the time t has exceeded the evaluation period ΔD since the start of counting (Yes in step S8), the indoor situation confirmation system 100 performs an alarm operation (step S9).

[0067] (Long-term absence notification No. 2) 8 shows an example of a process flow in which the indoor situation confirmation system 100 according to the first embodiment notifies that the room 60 is unoccupied for a long period of time. The indoor situation confirmation system 100 determines whether the room 60 is in an absent mode in which no one is present or in a present mode in which someone is present, by the user operating the individual terminal (step S6). Step S6 is the same as the process flow shown in FIG.

[0068] Next, it is determined whether the latest time t has exceeded the evaluation period ΔD since the occupancy mode was set (step S10). If the time t has not exceeded the evaluation period ΔD since the occupancy mode was set, recording of the concentration history value continues (No in step S10). If the time t has exceeded the evaluation period ΔD since the occupancy mode was set (Yes in step S10), the indoor situation confirmation system 100 determines whether to perform an alarm operation (step S11).

[0069] The measurement terminal 20 transmits the carbon dioxide concentration value measured at intervals of the measurement period Δt to the server 10. The server 10 stores the concentration value at each time t as a concentration history. The indoor situation monitoring system 100 determines whether or not there is a combination of the first concentration history value c1 and the second concentration history value c2 in which Δc=c1-c2 is equal to or greater than the threshold C within the evaluation period ΔD (step S11). If there is a combination of the first concentration history value c1 and the second concentration history value c2 in which the difference Δc is equal to or greater than the threshold C within the evaluation period ΔD, recording of the concentration history is continued until the evaluation period ΔD has elapsed again (Yes in step S11).

[0070] If there is no combination of the first concentration history value c1 and the second concentration history value c2 for which the difference Δc is equal to or greater than the threshold value C during the evaluation period ΔD, the indoor condition confirmation system 100 performs a reporting operation (step S12).

[0071] After performing the long-term absence notification operation, the indoor situation confirmation system 100 may end the information processing, or may perform a determination after the evaluation period ΔD has elapsed and perform the notification operation. In this case, the evaluation period ΔD may be determined based on an evaluation period Da that is a period shorter than the one that was initially set.

[0072] In addition, the difference Δc and the comparison period ΔT in the long-term absence notification may use the same settings as those used in the entry notification, or different settings may be used. In the long-term absence notification described above, the indoor situation confirmation system 100 makes a determination based on the concentration history measured in the room 60 after the user sets it to the presence mode, so for example, in the absence mode, at least one of the set values ​​of the difference Δc and the comparison period ΔT may be set smaller than the set values ​​in the entry notification.

[0073] As an example of a long-term absence notification, the indoor situation confirmation system 100 can set the evaluation period ΔD to, for example, 24 h, 36 h, 48 h, 72 h, 120 h, etc. However, the evaluation period ΔD is not limited to these values ​​and can be set appropriately, and may be set to, for example, several hours, 6 hours, etc.

[0074] 5, when the presence mode is set in the section Q to section T, the indoor situation confirmation system 100 issues a long-term absence notification at the time of point X3, 24 hours after the start point of the section Q where the presence mode is set. This also depends on the length of the evaluation period ΔD set in the indoor situation confirmation system 100.

[0075] 5, when the presence mode is set in section P to section U, a long-term absence notification is made at point X3, 24 hours after the carbon dioxide concentration value rises sharply in the last part of section P. This also changes depending on the settings of the difference Δc, comparison period ΔT, and evaluation period ΔD set in the indoor situation confirmation system 100.

[0076] 6 to 8, the entry notification and long-term absence notification are made after first determining whether the mode is absent or present, but the indoor situation confirmation system 100 does not need to have a function for switching between absent mode and present mode. The indoor situation confirmation system 100 may be configured to switch between the entry confirmation notification mode in absent mode and the long-term absence notification mode in present mode. In other words, if the answer is No in step 1 of FIG. 6, the process may proceed to the process of FIG. 7 or FIG. 8, and if the answer is No in step S6 of FIG. 7 or FIG. 8, the process may proceed to the process of FIG. 6.

[0077] (Regarding the alarm operation) The notification operation of the indoor situation confirmation system 100 is not only displayed on an individual terminal 30 such as a mobile information terminal or PC to make it easy for the system user to recognize, but it can also be set, for example, in the server 10 to set an email address for the notification destination and to send notifications only by email.

[0078] In particular, when the individual terminal 30 is a mobile information terminal, a PC, or the like, a push notification may be performed by an application installed on the individual terminal 30.

[0079] The alert operation may be performed by a device that uses voice such as an interphone or a buzzer, or a device that uses visual information such as displaying text information or turning on a warning light. In this case, these devices function as individual terminals 30, receive information related to the alert from the server 10, and perform alert operations such as outputting voice, displaying text information, or turning on a warning light.

[0080] As described above, the indoor situation confirmation system 100 issues entry and long-term absence notifications based on the carbon dioxide concentration value measured by the measuring terminal 20 in the room 60. The entry notification can be used, for example, to detect an intruder when no one is at home, or to confirm that a user has entered a guest room in an accommodation facility. The long-term absence notification can be used to confirm that a guest room in an accommodation facility has not been used for a long period of time, or to detect whether an elderly person living alone in a rental property is still alive.

[0081] There is known a technology for checking the presence or absence of people in a room 60 by using an image taken by a camera, but this raises privacy concerns. According to the indoor situation checking system 100 of the first embodiment, the indoor situation can be checked without using an image, and it is possible to check the presence or absence of people while suppressing privacy concerns. In other words, the indoor situation checking system 100 has the advantage of being versatile in use, since the measuring terminal 20 can be installed in a dressing room or a bathroom dressing room.

[0082] Furthermore, the indoor situation confirmation system 100 detects the presence of a person based on the temporal variation in the carbon dioxide concentration in the room. The carbon dioxide concentration in the air varies slowly depending on the weather and the surrounding environment, but the indoor situation confirmation system 100 according to the first embodiment can detect the presence of a person without being affected by these. Also, the carbon dioxide concentration in the room varies slightly depending on the location in the room, but the indoor situation confirmation system 100 according to the first embodiment can detect the presence of a person while suppressing this effect.

[0083] (Modification of the measuring terminal 20) The measuring terminal 20 performs the above-mentioned notification operation by being equipped with at least a carbon dioxide concentration sensor, but may further be equipped with other sensors. For example, by being equipped with an infrared sensor or a human sensor, the measuring terminal 20 can refer to the detection history of the infrared sensor or human sensor when notifying entry. For example, even if Δc is within a range below the threshold C in the judgment based on the carbon dioxide concentration history, the infrared sensor or human sensor may notify entry if it detects human movement. In this case, the range of settings for the judgment based on the carbon dioxide concentration history is expanded, such as by setting the threshold C higher.

[0084] 2, the measurement terminal 20 is directly attached to a power outlet, but the present invention is not limited to this. For example, the measurement terminal 20 may be powered by various sources, such as a USB terminal, a cigarette lighter socket in a vehicle, a battery, or a solar cell. If the measurement terminal 20 can be operated by a power source other than a power outlet, the range of locations where it can be installed will be expanded, such as inside a vehicle, not just inside a room 50.

[0085] Also, if the measuring terminal 20 is configured to receive power supply from sources other than an outlet, it can be used, for example, to prevent an infant or small child from being left unattended inside a car. In this case, the indoor situation confirmation system 100 detects, for example, that the car engine is stopped, the car doors are locked, or that the person does not move from a certain location for a certain time by GPS, and transitions to a notification mode. The indoor situation confirmation system 100 may be configured to perform a notification operation to the individual terminal 30, assuming that a person is left unattended inside the car, if Δc fluctuates to a threshold value C or more after transitioning to the notification mode. In this case, the condition that is the criterion for the determination in step S1 of FIG. 6 corresponds to the car engine being stopped, the car doors being locked, or that the person does not move from a certain location for a certain time by GPS, and when this condition is satisfied, the information processing from step S2 to step S5 is performed. The notification operation may be performed by the individual terminal 30, or the measuring terminal 20 itself may function as the individual terminal 30 and perform the notification by sound or by turning on a warning light. Alternatively, if at least a part of the functions of the interior condition confirmation system 100 is incorporated into the vehicle's system, the notification may be given by activation of the headlights or horn.

[0086] Although the present disclosure has been described above based on each embodiment, the present disclosure is not limited to the configuration of the above-mentioned embodiment. In each of the above-mentioned embodiments, the indoor situation confirmation system 100 is realized using a system including a client-server system of a network computer system, but the same functions as the indoor situation confirmation system 100 can be realized in various computers such as personal computers that do not constitute a client-server system, and various communication terminals and mobile information terminals such as mobile terminals and tablets. In addition, it is also possible to realize at least a part of the functions of the indoor situation confirmation system 100 by installing a computer program in various computers and various communication terminals and mobile information terminals. In other words, the present disclosure also includes a program for causing various computers to function as at least a part of the indoor situation confirmation system 100. In addition, the above-mentioned embodiments and modified examples may be implemented in appropriate combination. It is to be noted that the gist (technical scope) of the present disclosure also includes the range of various modifications, applications, and uses that a person skilled in the art may make as necessary.

[0087] The indoor situation confirmation system 100 described above may also include combinations of the features shown in the following Supplementary Notes 1 to 10. Such combinations are described below.

[0088] [Appendix 1] An indoor situation confirmation system comprising a measurement terminal and an information processing terminal, The measuring terminal includes: Transmit the ambient carbon dioxide concentration value every measurement period Δt, The information processing terminal includes: The concentration values ​​transmitted for each measurement period Δt are stored in chronological order as a concentration history; a first concentration history value c1 is one of the concentration values ​​included in the concentration history, and a second concentration history value c2 is a value calculated based on at least one of the concentration values ​​in the concentration history prior to the first concentration history value c1, and a notification operation is performed when a difference Δc=c1-c2 between the first concentration history value c1 and the second concentration history value c2 is equal to or greater than a threshold value C. Indoor situation confirmation system. [Appendix 2] The indoor situation confirmation system according to claim 1, The second concentration history value c2 is The concentration value is one of the concentration histories that is a comparison period ΔT earlier than the first concentration history value c1. Indoor situation confirmation system. [Appendix 3] The indoor situation confirmation system according to claim 2, The comparison period ΔT is set to be longer than the measurement period Δt. [Appendix 4] The indoor situation confirmation system according to claim 1, The second concentration history value c2 is an average value of a plurality of concentration values ​​in the concentration history before the first concentration history value c1, Indoor situation confirmation system. [Appendix 5] An indoor situation confirmation system according to any one of appendix 1 to 4, The information processing terminal includes: a notification operation is performed when Δc of any combination of the first concentration history value and the second concentration history value among the plurality of concentration history values ​​included in an evaluation period ΔD that is longer than the comparison period ΔT is less than a threshold value C; Indoor situation confirmation system. [Appendix 6] An indoor situation confirmation system according to any one of appendix 1 to 5, The measurement period Δt is set to be shorter than 20 minutes, The comparison period ΔT is set to a length of 20 minutes or more, The threshold C is set to 35 ppm or more. Indoor situation confirmation system. [Appendix 7] The indoor situation confirmation system according to claim 5, The evaluation period ΔD is set to 24 hours or more. Indoor situation confirmation system. [Appendix 8] An indoor situation confirmation system according to any one of appendix 1 to 7, The measurement terminal includes: A housing having a built-in carbon dioxide measuring device; a power plug that is installed on an exterior surface of the housing and that can supply power to the carbon dioxide measuring device; It is installed by plugging it into a power outlet in the room. Indoor situation confirmation system. [Appendix 9] An indoor situation confirmation system according to any one of appendix 1 to 8, The information processing terminal includes: A server that acquires information from the measurement terminal via a network; an individual terminal that acquires information from the server; The individual terminal includes: displaying at least one of the concentration value received from the server and the plurality of concentration history values ​​along a time series as measurement information; Indoor situation confirmation system. [Appendix 10] The indoor situation confirmation system according to claim 9, The individual terminal includes: A portable information terminal that performs a push notification as a notification action on a display device by an installed application. Indoor situation confirmation system. [Explanation of symbols]

[0089] 10: Server 20: Measurement terminal 20a: Measuring terminal 20b: Measuring terminal 20c: Measurement terminal 21: Control section 22: Storage section 23: SIM card 24:Display device 24a: Carbon dioxide concentration display section 24b: Temperature display section 24c:Humidity display section 25: Communications Department 26: Measuring part 26a: Detection hole 26b: Front panel 26c: Slit 27: Power supply unit 27a: Plug 28: Housing 28a: Outer shell 30: Individual terminal 50: Room 50a:Room 50b: Room 50c:Room 51: Control section 52: Storage section 53: Communications Department 54: Input section 55: Output section 60: Room 60a:Room 62: Outlet 90: Network 100: Indoor situation confirmation system C: Threshold Da: Evaluation period c1: First concentration history value c1b: First concentration history value c2: Second concentration history value c2b: Second concentration history value ΔD: Evaluation period ΔT: Comparison period Δc: difference Δca: Difference Δcb: difference Δt: Measurement period

Claims

1. An indoor situation confirmation system comprising a measurement terminal and an information processing terminal, The measurement terminal includes: Transmitting the ambient carbon dioxide concentration value every measurement period Δt; The information processing terminal includes: The concentration values ​​transmitted for each measurement period Δt are stored in chronological order as a concentration history; a first concentration history value c1 is one of the concentration values ​​included in the concentration history, and a second concentration history value c2 is a value calculated based on at least one of the concentration values ​​in the concentration history prior to the first concentration history value c1; and when a difference Δc=c1-c2 between the first concentration history value c1 and the second concentration history value c2 is equal to or greater than a threshold value C, a notification operation is performed; The second concentration history value c2 is one of the concentration histories that is a comparison period ΔT before the first concentration history value c1; The comparison period ΔT is It is set longer than the measurement period Δt. Indoor situation confirmation system.

2. An indoor situation confirmation system including a measurement terminal and an information processing terminal, the indoor situation confirmation system being capable of setting a presence mode that is set when a person is present in a room in which the measurement terminal is installed, and an absence mode that is set when a person is not present in the room, The measurement terminal includes: Transmitting the ambient carbon dioxide concentration value every measurement period Δt; The information processing terminal includes: In the absence mode, the concentration values ​​transmitted for each measurement period Δt are stored in chronological order as a concentration history; a first concentration history value c1 is one of the concentration values ​​included in the concentration history, and a second concentration history value c2 is a value calculated based on at least one of the concentration values ​​in the concentration history prior to the first concentration history value c1, and a notification operation is performed when a difference Δc=c1-c2 between the first concentration history value c1 and the second concentration history value c2 is equal to or greater than a threshold value C; Indoor situation confirmation system.

3. The indoor situation confirmation system according to claim 2, The second concentration history value c2 is one of the concentration values ​​in the concentration history that is earlier than the first concentration history value c1 by a comparison period ΔT; Indoor situation confirmation system.

4. The indoor situation confirmation system according to claim 3, The comparison period ΔT is set to be longer than the measurement period Δt. Indoor situation confirmation system.

5. The indoor situation confirmation system according to any one of claims 1 to 4, The second concentration history value c2 is an average value of a plurality of concentration values ​​in the concentration history before the first concentration history value c1, Indoor situation confirmation system.

6. The indoor situation confirmation system according to any one of claims 1, 3 and 4, The information processing terminal includes: a notification operation is performed when Δc of any combination of the first concentration history value c1 and the second concentration history value c2 among a plurality of concentration history values ​​included in an evaluation period ΔD that is longer than the comparison period ΔT is less than a threshold value C; Indoor situation confirmation system.

7. The indoor situation confirmation system according to any one of claims 1, 3 and 4, The measurement period Δt is set to be shorter than the comparison period ΔT, The comparison period ΔT is set to a length of 20 minutes or more, The threshold C is set to 35 ppm or more. Indoor situation confirmation system.

8. The indoor situation confirmation system according to claim 6, The evaluation period ΔD is set to 24 hours or more. Indoor situation confirmation system.

9. The indoor situation confirmation system according to any one of claims 1 to 4, The measurement terminal includes: A housing having a built-in carbon dioxide measuring device; a power plug that is installed on an exterior surface of the housing and that can supply power to the carbon dioxide measuring device; It is installed by plugging it into a power outlet in the room. Indoor situation confirmation system.

10. The indoor situation confirmation system according to any one of claims 1 to 4, The information processing terminal includes: A server that acquires information from the measurement terminal via a network; an individual terminal that acquires information from the server; The individual terminal includes: displaying at least one of the concentration value and a plurality of concentration history values ​​along a time series received from the server as measurement information; Indoor situation confirmation system.

11. The indoor situation confirmation system according to claim 10, The individual terminal includes: A portable information terminal that performs a push notification as a notification action on a display device by an installed application. Indoor situation confirmation system.

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