JP6934553B1 - Information processing equipment, information processing system, information processing method and information processing program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an information processing device, an information processing system, an information processing method and an information processing program capable of estimating the number of people in a room at an early stage based on the concentration of carbon dioxide. SOLUTION: As a reference change of carbon dioxide concentration, an information processing apparatus provides reference change information regarding a change in carbon dioxide concentration per unit time when one person is present in the space, with the size of the space as a parameter. A storage unit for storing, a reception unit for receiving the carbon dioxide concentration measured in a predetermined space, a carbon dioxide concentration in the first hour received by the reception unit, and a first time before the first hour. Predetermined based on the acquisition unit that acquires the change in concentration based on the concentration of carbon dioxide in 2 hours, the change in the concentration of carbon dioxide acquired by the acquisition unit, and the reference change information stored in the storage unit. It is provided with an estimation unit that estimates the number of people in the space and an output control unit that controls to output the number of people estimated by the estimation unit. [Selection diagram] Fig. 1

Description

The present invention relates to an information processing apparatus, an information processing system, an information processing method and an information processing program.

Conventionally, there is a technique for measuring the concentration of carbon dioxide in a room. The technique described in Patent Document 1 measures the concentration of carbon dioxide in a room and estimates the number of people in the room.

Japanese Unexamined Patent Publication No. 2008-304124

The concentration of carbon dioxide rises when there is a person in the room, but becomes a steady value (approximately constant) over time. The technique described in Patent Document 1 estimates the number of people in a room based on the steady-state value of carbon dioxide. However, since the concentration of carbon dioxide rises relatively when there are more people in the room, warnings related to the concentration of carbon dioxide at an earlier stage in order to keep the carbon dioxide in the room below the reference value. Need to be done. That is, since the technique described in Patent Document 1 estimates the number of people in the room when the carbon dioxide concentration reaches a steady value, the carbon dioxide concentration is a reference value depending on the number of people in the room. There is a risk of exceeding.

An object of the present invention is to provide an information processing device, an information processing system, an information processing method, and an information processing program capable of estimating the number of people in a room at an early stage based on the concentration of carbon dioxide.

In one aspect of the information processing device, the unit time of the carbon dioxide concentration when one person is present in the space, with the size of the space, the ventilation volume of the space, and the intended use of the space as parameters as the reference change of the carbon dioxide concentration. A storage unit that stores reference change information regarding changes in hits, a reception unit that receives carbon dioxide concentration measured in a predetermined space, a carbon dioxide concentration in the first hour received by the reception unit, and a first hour. The acquisition unit that acquires the change in concentration based on the concentration of carbon dioxide in the second time earlier than the time, the change in the concentration of carbon dioxide acquired by the acquisition unit, and the reference that is stored in the storage unit. It includes an estimation unit that estimates the number of people in a predetermined space based on the change information, and an output control unit that controls to output the number of people estimated by the estimation unit.

In one aspect of the information processing apparatus, the acquisition unit acquires the rate of increase in the carbon dioxide concentration based on the carbon dioxide concentration in the first hour and the carbon dioxide concentration in the second hour as a change in the carbon dioxide concentration. Then, the estimation unit determines a predetermined space based on the rate of increase in the concentration of carbon dioxide acquired by the acquisition unit and the rate of increase in carbon dioxide in a unit time recorded in the reference change information stored in the storage unit. You may estimate the number of people inside.

In one aspect of the information processing apparatus, the output control unit may control to output a warning when the number of people estimated by the estimation unit exceeds a preset first threshold value.

In one aspect of the information processing apparatus, the output control unit warns when it is estimated that the carbon dioxide concentration exceeds a preset second threshold value based on the change in the carbon dioxide concentration acquired by the acquisition unit. May be controlled to output.

In one aspect of the information processing apparatus, the reception unit receives the concentration of carbon dioxide measured in a predetermined space at a predetermined interval, and the acquisition unit receives the concentration of carbon dioxide received by the reception unit in time based on the concentration of a plurality of carbon dioxide. , The amount of change in the concentration of carbon dioxide per unit time may be obtained.

In one aspect of the information processing device, the unit time of the carbon dioxide concentration when one person is present in the space, with the size of the space, the ventilation volume of the space, and the intended use of the space as parameters as the reference change of the carbon dioxide concentration. A change in concentration based on a storage unit that stores reference change information regarding the change in hit, a concentration of carbon dioxide in the first hour, and a concentration of carbon dioxide in the second hour, which is time before the first hour. An estimation unit that estimates the number of people in a predetermined space based on the acquisition unit that acquires the information, the change in the concentration of carbon dioxide acquired by the acquisition unit, and the reference change information stored in the storage unit. It includes an output control unit that controls to output the number of people estimated by the estimation unit.

In one aspect of the information processing system, an output unit that outputs information, a measurement unit that measures the concentration of carbon dioxide in a predetermined space and outputs measurement information, and a space size as a reference change of the concentration of carbon dioxide. Based on the measurement information and the storage unit that stores the reference change information regarding the change in carbon dioxide concentration per unit time when there is one person in the space, with the parameters of the ventilation volume of the space and the usage of the space. An acquisition unit that acquires the concentration of carbon dioxide in one hour and the concentration of carbon dioxide in the second hour before the first hour, and acquires the changes in the concentrations in the first and second hours. An estimation unit that estimates the number of people in a predetermined space based on the change in carbon dioxide concentration acquired by the acquisition unit and the reference change information stored in the storage unit, and the number of people estimated by the estimation unit. Is provided with an output control unit that controls the output from the output unit.

In one aspect of the information processing method, the unit time of the carbon dioxide concentration when one person is present in the space, with the size of the space, the ventilation volume of the space, and the intended use of the space as parameters as the reference change of the carbon dioxide concentration. A reception step in which a computer having a storage unit for storing reference change information regarding a hit change receives a carbon dioxide concentration measured in a predetermined space, a carbon dioxide concentration in the first hour received by the reception step, and a carbon dioxide concentration in the first hour. An acquisition step for acquiring a change in concentration based on the concentration of carbon dioxide in the second hour before the first hour, a change in the concentration of carbon dioxide acquired by the acquisition step, and storage in a storage unit. Based on the reference change information to be obtained, an estimation step for estimating the number of people in a predetermined space and an output control step for controlling the number of people estimated by the estimation step to be output are executed.

One aspect of the information processing program is a carbon dioxide concentration when there is one person in the space, with the parameters of the space size, the ventilation volume of the space, and the usage of the space as the reference change of the carbon dioxide concentration in the computer. A storage function that stores reference change information regarding changes per unit time, a reception function that accepts the concentration of carbon dioxide measured in a predetermined space, and a carbon dioxide concentration in the first hour received by the reception function. The acquisition function that acquires the change in concentration based on the concentration of carbon dioxide in the second hour before the first hour, the change in the concentration of carbon dioxide acquired by the acquisition function, and the memory function are stored. Based on the reference change information to be obtained, an estimation function for estimating the number of people in a predetermined space and an output control function for controlling the number of people estimated by the estimation function to be output are realized.

In one aspect of the information processing device, the unit time of the carbon dioxide concentration when one person is present in the space, with the size of the space, the ventilation volume of the space, and the intended use of the space as parameters as the reference change of the carbon dioxide concentration. A storage unit that stores reference change information regarding changes in hits, a reception unit that receives carbon dioxide concentration measured in a predetermined space, a carbon dioxide concentration in the first hour received by the reception unit, and a first hour. The acquisition unit that acquires the change in concentration based on the concentration of carbon dioxide in the second time earlier than the time, the change in the concentration of carbon dioxide acquired by the acquisition unit, and the reference that is stored in the storage unit. It includes an estimation unit that estimates the number of people in a predetermined space based on the change information, and an output control unit that controls to output the number of people estimated by the estimation unit. This allows the information processing device to estimate the number of people in the room relatively early based on the concentration of carbon dioxide.
The information processing system, the information processing method, and the information processing program of one aspect can exert the same effect as the information processing apparatus of one aspect described above.

It is a figure for demonstrating an information processing system. It is a block diagram for explaining an information processing system. It is a figure for demonstrating an example of the change (increase) of the concentration of carbon dioxide measured by a measuring part. It is the first figure for demonstrating an example of the pictogram (warning display) displayed on the display part. It is a 2nd figure for demonstrating an example of a pictogram (warning display) displayed on a display part. It is a 3rd figure for demonstrating an example of a pictogram (warning display) displayed on a display part. FIG. 4 is a fourth diagram for explaining an example of a pictogram (warning display) displayed on the display unit. FIG. 5 is a fifth diagram for explaining an example of a pictogram (warning display) displayed on the display unit. It is a figure for demonstrating an example of a reference change information (table). It is a figure for demonstrating an example of the concentration change of carbon dioxide. It is a flowchart for demonstrating the information processing method which concerns on one Embodiment.

Hereinafter, an embodiment of the present invention will be described.
Although the wording of "information" is used in this specification, the wording of "information" can be paraphrased as "data", and the wording of "data" can be paraphrased as "information".

First, the outline of the information processing system 1 will be described.
FIG. 1 is a diagram for explaining the information processing system 1.

The information processing system 1 includes a measuring unit 10 and an information processing device 20.

The measuring unit 10 measures the concentration of carbon dioxide. For example, the measuring unit 10 is arranged in a predetermined space such as a room, and measures the concentration of carbon dioxide in the space. The measuring unit 10 may measure the concentration of carbon dioxide continuously or intermittently, for example. When the measuring unit 10 measures the concentration of carbon dioxide intermittently in time, for example, it may be measured at predetermined intervals (or at regular intervals). For example, one measuring unit 10 may be arranged in the space, or a plurality of measuring units 10 may be arranged in the space.

When there is a person in the room, for example, the carbon dioxide concentration in the room rises when the person breathes. For example, the concentration of carbon dioxide in a room gradually increases from the time when a person enters the room, and becomes a steady state (substantially constant) with the passage of time. The information processing apparatus 20 stores in advance such a change in carbon dioxide concentration (for example, the rate of increase in carbon dioxide) as a reference change. The standard change of carbon dioxide concentration is, for example, the size of the space (plane size and height size, etc.), the ventilation volume of the space, and the purpose of use of the space (for example, office room, conference room, exercise facility, classroom). , And adults, middle-aged people, children, etc.) may be used as parameters. The above-mentioned reference change may be, for example, a change in carbon dioxide concentration when there is one person (for example, an adult, a middle-aged person, a child, etc.) in the room.

The information processing device 20 may be, for example, a computer (desktop, laptop, etc.), a server, a tablet, or the like. The information processing device 20 receives the concentration of carbon dioxide measured by the measuring unit 10. The information processing apparatus 20 may acquire, for example, a change (amount of change) in the concentration of carbon dioxide based on the concentrations of a plurality of carbon dioxide measured at different times. The information processing device 20 estimates how many people are in the space where the measuring unit 10 is arranged, based on the change (change amount) of the carbon dioxide concentration measured by the measuring unit 10 and the reference change.

Next, the information processing system 1 will be described in detail.
FIG. 2 is a block diagram for explaining the information processing system 1.

As described above, the measuring unit 10 measures the concentration of carbon dioxide in the room. The measuring unit 10 continuously or intermittently transmits measurement information regarding the measured carbon dioxide concentration to the outside. For example, the measurement unit 10 may transmit measurement information to the outside at preset time intervals. The measurement unit 10 may transmit the measurement information to the outside by, for example, communication using a wired or wireless communication. As a specific example, the measuring unit 10 may transmit the measurement information to the outside by using LPWA (Low Power Wide Area), WiFi (registered trademark) or the like. As an example, the measuring unit 10 may be an IoT (Internet of Things) terminal or the like. The measurement unit 10 may, for example, transmit the measurement information to the information processing device 20, or may transmit it to an external server (not shown) or the like. When the measurement information is stored in the server or the like, the information processing device 20 acquires the measurement information from the external server or the like at a predetermined timing.
For example, when there are a plurality of measuring units 10, each measuring unit 10 may be set with identification information for identifying the measuring unit 10. In this case, the measurement unit 10 may include the identification information in the measurement information and transmit it to the outside.

The information processing device 20 includes a communication unit 26, a storage unit 27, a display unit 28, a reception unit 22, an acquisition unit 23, an estimation unit 24, and an output control unit 25. The reception unit 22, the acquisition unit 23, the estimation unit 24, and the output control unit 25 may be realized as one function of the control unit 21 (for example, an arithmetic processing unit or the like) of the information processing device 20.

The communication unit 26 communicates with an external device. For example, the communication unit 26 transmits / receives information to / from the measurement unit 10 and the above-mentioned external server (not shown).

The storage unit 27 stores various information and programs. The storage unit 27 may store, for example, reference change information. The reference change information is information on the reference change of the carbon dioxide concentration according to various conditions (parameters). More specifically, the reference change information is information on the change in carbon dioxide concentration per unit time when there is one person in the space, with the size of the space, the ventilation volume of the space, and the usage of the space as parameters. be. That is, the reference change information is, for example, a change over time in the carbon dioxide concentration according to each case, with parameters such as the floor area in the room, the height of the ceiling, the ventilation state in the room, and the usage scene (usage) of the user. It may be information about a table which recorded the increase value (increase rate) of the concentration of carbon dioxide per unit time (for example, 1 minute) calculated from. The details of the reference change information will be described later.

The display unit 28 displays, for example, characters, symbols, images, and the like. As an example, the display unit 28 may display characters, symbols, images, and the like using a Web browser or the like. The display unit 28 is, for example, based on the control of the output control unit 25, the concentration of carbon dioxide measured by the measurement unit 10, the change in the concentration of carbon dioxide acquired by the acquisition unit 23 described later, and the estimation unit 24 described later. It is possible to display the number of people estimated by, and warnings and the like as described later. The display unit 28 may be arranged in the information processing device 20 or may be outside the information processing device 20.

The reception unit 22 receives the measurement information via the communication unit 26. That is, the reception unit 22 receives the concentration of carbon dioxide measured in a predetermined space. When the measurement unit 10 performs the measurement intermittently, the reception unit 22 may receive the concentration of carbon dioxide measured in a predetermined space at a predetermined interval.

FIG. 3 is a diagram for explaining an example of a change (increase) in the concentration of carbon dioxide measured by the measuring unit 10.
The acquisition unit 23 acquires the change in the concentration based on the carbon dioxide concentration in the first hour and the carbon dioxide concentration in the second time time before the first hour, which is received by the reception unit 22. do. As an example in FIG. 3, the acquisition unit 23 has a time (T-) among the concentrations of carbon dioxide measured at a plurality of times (... T-3, T-2, T-1, T ...) based on the measurement information. The amount of change (M2-M1) between the carbon dioxide concentration M1 in 2) and the carbon dioxide concentration M2 at time (T) is acquired. Similarly, the acquisition unit 23 acquires the amount of change (M4-M3) between the carbon dioxide concentration M3 at the time (T-3) and the carbon dioxide concentration M4 at the time (T-1). In addition, as in the above-mentioned example, the acquisition unit 23 not only acquires the concentration change by using the measurement result of the carbon dioxide concentration two times before, but also, for example, measures the carbon dioxide concentration one time before. The concentration change may be acquired by using the result, or the concentration change may be acquired by using the measurement result of the carbon dioxide concentration three times or more before.

In the acquisition unit 23, the change (change amount (M2-M1)) of the carbon dioxide concentration obtained by the two measurements, that is, the measurement at the time (T) and the time (T-2) in the case of the above-mentioned example, If it is positive (indicating an increase), it may be obtained that the concentration of carbon dioxide in the room is increasing.
Alternatively, the estimation unit 24 changes the concentration of carbon dioxide obtained by four measurements, that is, at time (T) and time (T-2) in the case of the above-mentioned example (change amount (M2-M1)). ) And the change in carbon dioxide concentration obtained by measurement at time (T-1) and time (T-3) (change amount (M4-M3)) are both positive (indicating an increase). It may be obtained that the concentration of carbon dioxide in the room is increasing.
The acquisition unit 23 is not limited to the above-mentioned example, and may estimate whether the concentration of carbon dioxide in the room is increasing based on the measurement of 6 times or more.

If there are people in the room, the concentration of carbon dioxide in the room will increase. Therefore, the acquisition unit 23 may acquire the rate of increase in the carbon dioxide concentration based on the carbon dioxide concentration in the first hour and the carbon dioxide concentration in the second time as a change in the carbon dioxide concentration. .. That is, the acquisition unit 23 may acquire the amount of change in the concentration of carbon dioxide per unit time based on the concentration of a plurality of carbon dioxide received by the reception unit 22 over time. As an example, when it is estimated that the carbon dioxide concentration is increasing based on two or more measurements as described above, the acquisition unit 23 acquires the amount of change (rate of increase) in the carbon dioxide concentration. You may do it.

As a specific example, in the measurement of the carbon dioxide concentration from the time (T-3) to the time (T) described above, when the measurement interval is Tp, the acquisition unit 23 performs a unit time (for example, 1 minute). ) Can be calculated by the following formula (1).
Rate of increase U = (change amount (M2-M1) + change amount (M4-M3)) / 2 × Tp ... (1)
As an example, the measurement interval Tp is "1" in the case of a 1-minute interval and "3" in the case of a 3-minute interval. The above-mentioned "unit time" is not limited to one minute, and may be an appropriately set time.

The acquisition unit 23 described above may be arranged not only in the information processing device 20 but also in the measurement unit 10. In this case, the acquisition unit 23 determines the concentration of carbon dioxide in the first hour and the second time before the first hour, for example, based on the concentration of carbon dioxide in the room measured by the measuring unit 10. The change in concentration (change in carbon dioxide concentration (rate of increase)) is obtained based on the concentration of carbon dioxide in, and information on the change in concentration (change in carbon dioxide concentration (rate of increase)) is provided. It may be transmitted to the processing device 20. Alternatively, the acquisition unit 23 may transmit the average value of the carbon dioxide concentration acquired a plurality of times to the information processing apparatus 20.
As a result, the carbon dioxide concentration is measured relatively frequently by the measuring unit 10, so that the carbon dioxide concentration changes (change amount (rate of increase)) at a relatively earlier stage in which the carbon dioxide concentration increases. ) Can be obtained. Therefore, the information processing apparatus 20 can estimate how many people are in the space where the measuring unit 10 is arranged, as will be described later, at a relatively earlier stage where the concentration of carbon dioxide increases.

The estimation unit 24 estimates the number of people in a predetermined space based on the carbon dioxide concentration change acquired by the acquisition unit 23 and the reference change information stored in the storage unit 27. That is, the estimation unit 24 is based on the rate of increase in the concentration of carbon dioxide acquired by the acquisition unit 23 and the rate of increase in carbon dioxide in the unit time recorded in the reference change information stored in the storage unit 27. The number of people in a predetermined space may be estimated. As a specific example, the estimation unit 24 can calculate the number of people in the room by the following formula (2).
Estimated number of people = (change in carbon dioxide per unit time (rate of increase)) / (change in carbon dioxide per unit time extracted from reference change information (table) (rate of increase)) ... (2)

The estimation unit 24 estimates the numerical value calculated from the above equation (2) as the number of people in a predetermined space. In this case, the estimation unit 24 estimates the number of people in a predetermined space, for example, by rounding off the decimal point of the numerical value calculated from the above formula or by rounding down the decimal point. May be good. Further, the estimation unit 24 uses, for example, parameters related to the space (indoor) for estimating the number of people (for example, the size of the space (plane size, height size, etc.), the ventilation volume of the space, the usage of the space, etc.). The number of people in a predetermined space may be estimated by appropriately selecting a table according to the situation.

The estimation unit 24 may estimate the future carbon dioxide concentration based on the amount of change (increase rate) in the carbon dioxide concentration per unit time (for example, 1 minute) acquired by the acquisition unit 23. That is, the estimation unit 24 can estimate the concentration of carbon dioxide after Tq time by using the current concentration of carbon dioxide and the above-mentioned formula (1). The estimation unit 24 estimates the concentration of carbon dioxide after Tq hours by the following equation (3).
Carbon dioxide concentration after Tq hours = (current carbon dioxide concentration) + (change in carbon dioxide concentration per unit time (rate of increase)) x Tq ... (3)

The output control unit 25 controls the output unit so as to output the number of people estimated by the estimation unit 24. The output unit may be, for example, the communication unit 26, the display unit 28, the storage unit 27, or the like described above. That is, the output control unit 25 may control the communication unit 26 so as to transmit information about the number of people estimated by the estimation unit 24 to the outside (for example, an external server, an external terminal, or the like (not shown)). Further, the output control unit 25 may control the display unit 28 so as to display the number of people estimated by the estimation unit 24. Further, the output control unit 25 may control the storage unit 27 so as to store information about the number of people estimated by the estimation unit 24.

The output control unit 25 controls the output unit so as to output the concentration of carbon dioxide estimated by the estimation unit 24. The output unit may be, for example, the communication unit 26, the display unit 28, the storage unit 27, or the like described above. That is, the output control unit 25 controls the communication unit 26 so as to transmit information on the carbon dioxide concentration estimated by the estimation unit 24 to the outside (for example, an external server, an external terminal, etc. (not shown)). May be good. Further, the output control unit 25 may control the display unit 28 so as to display the concentration of carbon dioxide estimated by the estimation unit 24. Further, the output control unit 25 may control the storage unit 27 so as to store information regarding the carbon dioxide concentration estimated by the estimation unit 24.

The output control unit 25 displays, for example, the estimated number of people in a predetermined space and the concentration of carbon dioxide on the display unit 28 by using a Web application. As a result, the output control unit 25 can output whether the number of people in the predetermined space is relatively large (whether the predetermined space is densely populated with people). Further, the output control unit 25 displays, for example, a window opening promotion state display, a carbon dioxide concentration increase state display (for example, a pictogram containing a person), and an overcapacity state display (for example, a person leaves). A pictogram or the like that prompts the user may be displayed on the display unit 28.

The external terminal described above may be a terminal located in a predetermined space. For example, when the external terminal is a computer, a smartphone, a tablet, or the like and there is an access point for communication (for example, an access point for wireless communication such as WiFi) in a predetermined space, the identification information distributed to the measuring unit 10 , The association information associated with the identification information of the access point arranged in the predetermined space where the measurement unit 10 is arranged may be stored in the storage unit 27 or the like in advance.
The information processing device 20 (output control unit 25) is, for example, based on the concentration of carbon dioxide concentration measured by the measuring unit 10, the number of people in a predetermined space and the future concentration of carbon dioxide as described above. Is estimated for an external terminal that identifies an access point in the space where the measuring unit 10 is arranged based on the association information stored in the storage unit 27 and makes a connection related to communication to the access point. Information regarding the number of people and future carbon dioxide concentrations may be transmitted.
Further, for example, as will be described later, the information processing device 20 warns when the number of people in the predetermined space exceeds the threshold value, or when the future carbon dioxide concentration in the predetermined space exceeds the threshold value. Even in this case, a warning may be output to an external terminal that communicates with the access point arranged in the predetermined space based on the association information.

The output control unit 25 may control to output a warning when the number of people estimated by the estimation unit 24 exceeds a preset first threshold value. A limit on the number of people (for example, capacity) may be set in a predetermined space in which the measuring unit 10 is arranged. When the capacity of a predetermined space is input using an input unit (not shown) or the like arranged in the information processing device 20, or when information about the capacity of a predetermined space is stored in advance in the storage unit 27. The information processing device 20 (output control unit 25) may set the capacity as the first threshold value. The output control unit 25 may control the output unit so as to output a warning when the number of people estimated by the estimation unit 24 exceeds the capacity (first threshold value) of the predetermined space. As an example, the output control unit 25 warns that the number of people in the predetermined space exceeds the capacity (first threshold value), warns that the number of people in the predetermined space is reduced, and the number of people in the predetermined space is reduced. The display unit 28 may be controlled to display a warning or the like to encourage ventilation. Further, the output control unit 25 may control the speaker (not shown) (output unit) so as to output the above-mentioned voice indicating the warning or the warning sound. Further, the output control unit 25 may transmit the above-mentioned warning to the external terminal by a medium capable of communicating via a communication network such as e-mail.

Further, the above-mentioned first threshold value may be a plurality of values set in multiple stages. A plurality of first threshold values may be set in the information processing device 20 (output control unit 25) based on the floor area of a predetermined space. As an example, the information processing device 20 (output control unit 25) ^{is set to a value in which 50% of the floor area of a predetermined space is a capacity (10 people if the floor area is 20 m 2} ), and the capacity (10 people) is set. A plurality of first threshold values may be set, in which the name) is set as the threshold value A and 80% (8 people) of the capacity is set as the threshold value B. In this case, the output control unit 25 outputs that it is "normal" if the number of people estimated by the estimation unit 24 is less than the threshold value B, and the number of people estimated by the estimation unit 24 is equal to or more than the threshold value B and less than the threshold value A. If so, a warning indicating "caution" may be output, and if the number of people estimated by the estimation unit 24 is equal to or greater than the threshold value A, a warning prompting improvement regarding the number of people, ventilation, or the like may be output. The output control unit 25 may transmit the above-mentioned warning to an external terminal by means of a medium capable of communicating via a communication network such as e-mail.

The output control unit 25 controls to output a warning when the carbon dioxide concentration is estimated to exceed a preset second threshold value based on the change in the carbon dioxide concentration acquired by the acquisition unit 23. It may be that. That is, the output control unit 25 may control the output unit to output a warning when the concentration of carbon dioxide estimated by the estimation unit 24 after the Tq time is estimated to exceed the threshold value. The information processing device 20 (output control unit 25) uses the above-mentioned input unit (not shown) or the like to input the concentration of carbon dioxide when a predetermined space fills the capacity, or the storage unit 27. When information on the carbon dioxide concentration when the predetermined space fills the capacity is stored in advance, the information processing device 20 (output control unit 25) may set the carbon dioxide concentration as the second threshold value. .. As an example, the output control unit 25 warns that the concentration of carbon dioxide after Tq time exceeds the second threshold value, warns that the number of people in a predetermined space is reduced by Tq time, and Tq time. The display unit 28 may be controlled so as to display a warning or the like to encourage ventilation of the predetermined space later. Further, the output control unit 25 may control the speaker (not shown) (output unit) so as to output the above-mentioned voice indicating the warning or the warning sound. Further, the output control unit 25 may transmit the above-mentioned warning to the external terminal by a medium capable of communicating via a communication network such as e-mail.

4 to 8 are FIGS. 1 to 5 for explaining an example of a pictogram (warning display) displayed on the display unit 28.

A pictogram is a display that encourages a person to take action. The pictograms shown in FIGS. 4 to 8 are merely examples, and it is possible to display pictograms other than the pictograms shown in FIGS. 4 to 8, and it is also possible to change the threshold setting for changing the displayed contents. be. In addition, since some conditions may be met, it is possible to prioritize the display of pictograms or to perform processing such as alternately displaying them.

The output control unit 25 is estimated by the estimation unit 24, that is, as an example, when the carbon dioxide concentration is not increased and the carbon dioxide concentration is below the threshold value, and when the carbon dioxide concentration is relative. A pictogram 101 indicating that ventilation is sufficient is displayed on the display unit 28 as shown in FIG. 4, for example, when the concentration is returned to the normal carbon dioxide concentration by opening a window or the like when the concentration is high. You may do it. In this case, the output control unit 25 may display, for example, the concentration of carbon dioxide measured by the measurement unit 10 on the display unit 28 by a numerical value and a gauge 102.

When the change in carbon dioxide concentration estimated by the estimation unit 24 exceeds the set threshold value, the output control unit 25 may display the pictogram 103 for promoting ventilation on the display unit 28 as shown in an example in FIG. good. The above-mentioned setting threshold value may be, for example, 800 ppm. In this case, similarly to FIG. 4, the output control unit 25 may display, for example, the concentration of carbon dioxide measured by the measurement unit 10 on the display unit 28 by a numerical value and a gauge 104.

When estimated by the estimation unit 24, the output control unit 25 may display a pictogram 105 indicating that the concentration of carbon dioxide is increasing on the display unit 28, as shown by an example in FIG. In this case, similarly to FIG. 4, the output control unit 25 may display, for example, the concentration of carbon dioxide measured by the measurement unit 10 on the display unit 28 by a numerical value and a gauge 106. The output control unit 25 can indicate that the concentration of carbon dioxide is increasing by increasing the numerical value and the gauge 106 together with an image showing how a person enters the room.

When the number of people estimated by the estimation unit 24 exceeds the set threshold value for the capacity, the output control unit 25 promotes to reduce the number of people in a predetermined space as shown in FIG. 7 (prompts exit). ) The pictogram 107 may be displayed on the display unit 28. In this case, similarly to FIG. 4, the output control unit 25 displays, for example, the concentration of carbon dioxide measured by the measuring unit 10 by a numerical value and a gauge 108 together with an image showing how a person goes out of the room. It may be displayed on 28.

When the output control unit 25 estimates by the estimation unit 24, the output control unit 25 may display a pictogram displaying the estimated number of people on the display unit 28 as shown in an example in FIG. For example, the output control unit 25 sets one or a plurality of threshold values (for example, 80% of the capacity) in advance for the capacity of a predetermined space, and the number of people estimated by the estimation unit 24 is equal to or less than the threshold C. In this case, a pictogram having a blue background may be displayed on the display unit 28. The output control unit 25 may change the background to yellow or the number of people to yellow when the number of people estimated by the estimation unit 24 exceeds the threshold value C. Further, when the number of people estimated by the estimation unit 24 exceeds the threshold value D (threshold value C <threshold value D), the output control unit 25 may change the background to red or the number of people portion to red. As a result, the output control unit 25 can notify the current state of the number of people in the room, for example, a warning for exceeding the capacity at an early stage.

Next, the reference change information will be described.
FIG. 9 is a diagram for explaining an example of reference change information (table).

In the case where an example is shown in FIG. 9, the reference change information (table) includes the change in carbon dioxide concentration (unit time (unit time)) with the parameters of the user, the size of the room (space), and the ventilation volume of the room (space). For example, the amount of change (rate of increase) in carbon dioxide concentration per minute, etc.) is recorded. In addition to the case where an example is shown in FIG. 9, the reference change information (table) records changes in carbon dioxide concentration according to each of a plurality of usage conditions (parameters) of the room (space) in addition to the above-mentioned parameters. It may be a thing.

For example, when the space usage status is a conference room, a classroom, or the like, reference change information (table) as shown in FIG. 9 may be created.
In this case, in the standard change information (table), for example, the amount of carbon dioxide emissions for one adult (user) as a user is set, and one middle school person (usage status is high school and the usage status is high school and) as a user. For junior high school classrooms, etc.), the value obtained by multiplying the carbon dioxide emission amount per adult by "0.7" as a coefficient may be set as the carbon dioxide emission amount. Similarly, for example, for one child as a user (usage status is an elementary school classroom, etc.), the numerical value obtained by multiplying the carbon dioxide emission amount for one adult by "0.5" as a coefficient is used. It may be set as the amount of carbon dioxide emissions.
Further, the activity state coefficient a may be set in the reference change information (table). In this case, for example, the activity state coefficient a is set to a coefficient of "1" in the case of standard work, a coefficient of "2" is set in the case of very slight movement, and "3" is set in the case of slight movement. Coefficient of may be set. As a result, a more accurate carbon dioxide emission amount can be set by multiplying the standard carbon dioxide emission amount of one adult by the activity state coefficient a.
The coefficient is not limited to the numerical value of the above example, and a numerical value may be appropriately set according to a predetermined space usage situation or the like.

Further, the reference change information (table) shown in FIG. 9 shows the ^{amount of carbon dioxide emitted according to the size of the room (space) (for example, floor area [m 2} ] and height [m], etc.). Is set.
Further, in the reference change information (table) shown as an example in FIG. 9, the amount of carbon dioxide emissions is set according to the ventilation volume (ventilation state) of the room (space). The ventilation volume (ventilation state) may be set to, for example, four stages of "strong", "normal", "weak" and "no ventilation".

In the reference change information (table), the size of the room (space) (for example, only the floor area) is set, and when the height (ceiling height) is not set, the size of the room (space) is set. The volume of the room (space) may be obtained from the average ceiling height. If the volume of the room (space) can be determined by inputting the ceiling height, a volume table may be used. Similarly, regarding the usage status, it is possible to determine how many times the amount of emissions per adult is from the amount of activity of a person. Therefore, carbon dioxide according to the usage status is shown in the reference change information (table) illustrated in FIG. It is possible to increase the value of the change in carbon concentration (rate of increase).

FIG. 10 is a diagram for explaining an example of a change in carbon dioxide concentration.
The change (rate of increase) in the concentration of carbon dioxide per unit time recorded in the above-mentioned reference change information (table) changes with the passage of time. The change (rate of increase) can be obtained by conducting an experiment or the like in advance with reference to various calculation formulas, for example.

First, the ventilation volume is Q [m ³ / h], the elapsed time is t [h], the volume of the room is V [m ³ ], the amount of carbon dioxide generated is G, and the initial concentration of carbon dioxide in the room (space). Let Cs be, the change (rate of increase) (C—Cs) can be obtained by the following equation (4). An example of the ventilation model in this case is shown in FIG. When the initial carbon dioxide concentration Cs is outside air, the value is 400 ppm.

…（４）

… (4)

Further, in the steady state (t = ∞), the carbon dioxide concentration C in the room (space) can be obtained by the following equation (5).

…（５）

… (5)

Further, the amount of carbon dioxide generated G is calculated by the following equation (6).

…（６）
ここで、呼気中の二酸化炭素の濃度をＣｅ（ここでは４６０００ｐｐｍとする。）、在室者数をｎ［人］、１人当たりの呼気発生量（安静時）をＲ［ｍ^３／ｈ］（０．３９［ｍ^３／ｈ］（６．５［Ｌ／ｍｉｎ］）とする）（着席事務作業を想定）とする。また、ｋは呼吸量係数であり、例えば、大人・大学生は１、中高生は０．７、小学生は０．５となる。したがって、式（６）は以下のようになる。
Ｇ＝０．０１７９４＊ｎ＊ｋ＊ａ［ｍ^３／ｈ］ …（７）
上式から、人数に比例して二酸化炭素の発生量が増加することが分かる。

… (6)
Here, the concentration of carbon dioxide in the exhaled breath is Ce (here, 46000 ppm), the number of occupants is n [persons], and the amount of exhaled breath generated per person (at rest) is R [m ³ / h] ( 0.39 [m ^{3 /} h] (6.5 [L / min])) (assuming seated office work). Further, k is a respiratory volume coefficient, for example, 1 for adults / university students, 0.7 for junior high and high school students, and 0.5 for elementary school students. Therefore, the equation (6) is as follows.
G = 0.01794 * n * k * a [m ³ / h]… (7)
From the above equation, it can be seen that the amount of carbon dioxide generated increases in proportion to the number of people.

In this embodiment, it is assumed that the amount of carbon dioxide generated by one person (generation amount G) is constant in adults. Equation (7) is the amount of carbon dioxide generated in the case of one person, but the amount of carbon dioxide generated is doubled in the case of two people, and the amount of carbon dioxide generated is tripled in the case of three people. Become. For junior and senior high school students, the amount of carbon dioxide generated is, for example, 70% of that of adults, and for elementary school students, the amount of carbon dioxide generated is, for example, 50% of that of adults.

Here, even if the number of people who are in a predetermined space after the steady state is estimated, it will be delayed in time. In this embodiment, in order to estimate the number of people at an early stage (for example, the number of people is estimated at the start of a meeting and the start of a lecture), carbon dioxide emissions, the size of a room (space), and the ventilation state are used. The rising curve of the carbon dioxide concentration is recorded in advance in the reference change information (table) using the obtained "change over time of the carbon dioxide concentration".

Further, since it is difficult to measure the ventilation volume Q of the room (space), a preset value is used. Here, assuming that the ventilation volume per floor area of the room (space) is Qf [m ³ / m ² · h], the ventilation volume Q can be obtained by the following equation (8).
Q = Qf × S ... (8)
In the present embodiment, as the ventilation volume Q, a value of 30 is used when the ventilation is "strong", a value of 7.2 is used when the ventilation is "normal", and a value of 7.2 is used when the ventilation is "weak". Use the value of 3.6 and use the value of 1.3 when there is no ventilation.

The estimation unit 24 determines the change (rate of increase) in the carbon dioxide concentration per unit time based on the reference change information (table) as described above and the change in the carbon dioxide concentration measured by the measurement unit 10. The number of people is estimated by comparing with the change in carbon dioxide concentration measured by the measuring unit 10 (change in carbon dioxide concentration per unit time in a predetermined space (rate of increase)).
That is, the estimation unit 24 estimates the number of people in the predetermined space and the future concentration of carbon dioxide in the predetermined space by using the reference change information as shown in FIG. 9 as an example. In this case, parameters related to a predetermined space are input to the estimation unit 24. The parameters input to the estimation unit 24 may correspond to the parameters recorded in the reference change information. For example, the estimation unit 24 includes the size of a predetermined space for estimation (for example, floor area and height, etc.), usage status (for example, adults, middle-aged people, children, etc.), and ventilation state (for example, strong, strong, etc.). Normal, weak, none, etc.), activity state coefficient a (for example, the activity state coefficient a is "1" for standard work, "2" for very slight movements, and "3" for minor movements. The coefficient (input condition) of) is input, and by comparing the input parameter (input condition) with the reference change information (table), it is input from the reference change information (table). The change (rate of increase) of carbon dioxide per unit time corresponding to the specified parameter (input condition) is extracted.
The estimation unit 24 creates a predetermined space based on the change in carbon dioxide concentration acquired by the acquisition unit 23 and the change in carbon dioxide concentration per unit time extracted from the reference change information (table) as described above. It is possible to estimate the number of people present and the future carbon dioxide concentration in a given space.

Next, the information processing method according to the embodiment will be described.
FIG. 11 is a flowchart for explaining the information processing method according to the embodiment.

In step ST101, the measuring unit 10 measures the carbon dioxide concentration in a predetermined space and generates measurement information.

In step ST102, the reception unit 22 receives the measurement information generated in step ST101. For example, the reception unit 22 receives the measurement information transmitted from the measurement unit 10 or the measurement information stored in the server.

In step ST103, the acquisition unit 23 changes the carbon dioxide concentration (increase rate) based on the measurement information received in step ST102, that is, the carbon dioxide concentration in the first time and the carbon dioxide concentration in the second time. ) Is obtained.

In step ST104, the estimation unit 24 compares the carbon dioxide concentration change (increasing rate) acquired in step ST103 with the reference change information (table) stored in the storage unit 27. In this case, the usage purpose of the predetermined space is input to the estimation unit 24.

In step ST105, the estimation unit 24 estimates the number of people in a predetermined space based on the comparison in step ST104. In addition, the estimation unit 24 may estimate the future concentration of carbon dioxide in a predetermined space based on the comparison in step ST104. The output control unit 25 may control to output the number of people estimated by the estimation unit 24 and the future concentration of carbon dioxide.

In step ST106, the output control unit 25 determines whether the number of people estimated in step ST105 exceeds the first threshold value. If the estimated number of people exceeds the first threshold (Yes), the process proceeds to step ST107. If the estimated number of people does not exceed the first threshold value (No), the process ends.
Further, in the output control unit 25, the future concentration of carbon dioxide estimated in step ST105 exceeds the threshold value, that is, the change (rate of increase) in the concentration of carbon dioxide acquired in step ST103 exceeds the second threshold value. You may judge whether or not. When the future concentration of carbon dioxide exceeds the threshold value (when the rate of increase exceeds the second threshold value) (Yes), the process proceeds to step ST107. When the future concentration of carbon dioxide does not exceed the threshold value (when the rate of increase does not exceed the second threshold value) (No), the process ends.

In step ST107, the output control unit 25 outputs a warning. As an example, the output control unit 25 warns that the number of people in the predetermined space exceeds the capacity, warns that the number of people in the predetermined space will be reduced, and promotes ventilation of the predetermined space. The display unit 28 may be controlled to display a warning or the like. Further, the output control unit 25 may control the speaker (not shown) (output unit) so as to output the above-mentioned voice indicating the warning or the warning sound. Further, the output control unit 25 may transmit the above-mentioned warning to the external terminal by a medium capable of communicating via a communication network such as e-mail.

Next, the effect of this embodiment will be described.
The information processing device 20 has a storage unit 27 that stores reference change information, a reception unit 22 that receives the concentration of carbon dioxide measured in a predetermined space, and a carbon dioxide concentration in the first hour received by the reception unit 22. And the acquisition unit 23 that acquires the change in concentration based on the concentration of carbon dioxide in the second time before the first hour, and the change in the concentration of carbon dioxide acquired by the acquisition unit 23. An estimation unit 24 that estimates the number of people in a predetermined space based on the reference change information stored in the storage unit 27, and an output control unit 25 that controls to output the number of people estimated by the estimation unit 24. And.
Here, it is required to keep the concentration of carbon dioxide below a predetermined reference value in the room in the building. According to the Building Sanitation Law (Building Management Law), the concentration of carbon dioxide is required to be 1000 ppm or less. On the other hand, in schools as well, the recommended value under the School Health Law is required to be 1500 ppm or less. For this reason, carbon dioxide concentration measurement has been carried out regularly, but it is not always measured. Nowadays, with the spread of the new coronavirus, it is required to avoid crowding of people, and as a premise, it is required to sufficiently ventilate the room. However, since there is no index of ventilation, it is not possible to know what kind of ventilation should be performed. In such a situation, it was an urgent task to avoid crowding in the room and to provide sufficient ventilation. Further, in the conventional system, it is limited to simply showing the measured value of carbon dioxide concentration, and it is often used for judging the environmental condition. However, it is important to grasp the number of people in the room and detect whether or not there are more than the capacity at an early stage by using the concentration of carbon dioxide emitted by a person.
The information processing device 20 of the present embodiment can estimate the number of people in the room at an early stage based on the concentration of carbon dioxide in a predetermined space. Further, since the information processing device 20 of the present embodiment does not grasp the number of people by using a motion sensor, a surveillance camera, or the like arranged in the room, the system configuration can be simplified and a predetermined value can be obtained. You can protect the privacy of the people in the space.

In the information processing apparatus 20, the acquisition unit 23 acquires the rate of increase in the carbon dioxide concentration based on the carbon dioxide concentration in the first hour and the carbon dioxide concentration in the second time as a change in the carbon dioxide concentration. It may be that. In this case, the estimation unit 24 is based on the rate of increase in the concentration of carbon dioxide acquired by the acquisition unit 23 and the rate of increase in carbon dioxide in the unit time recorded in the reference change information stored in the storage unit 27. , The number of people in a predetermined space may be estimated.
The carbon dioxide concentration in the predetermined space gradually increases as described above, and becomes a steady state (substantially constant) with the passage of time. Since the information processing device 20 acquires a change (rate of increase) in the concentration of carbon dioxide, the number of people is in the early stage of the stage where the concentration of carbon dioxide in a predetermined space gradually increases (before the steady state is reached). Can be estimated.
Similarly, since the information processing apparatus 20 acquires the change (rate of increase) in the concentration of carbon dioxide, it is an early stage of the stage where the concentration of carbon dioxide in the predetermined space gradually increases (before the steady state is reached). Even so, the future carbon dioxide concentration can be estimated.

In the information processing device 20, the output control unit 25 may control to output a warning when the number of people estimated by the estimation unit 24 exceeds a preset first threshold value.
As a result, the information processing device 20 can promote the number of people in a predetermined space to be equal to or less than the reference value. That is, the information processing device 20 can make the concentration of carbon dioxide in the predetermined space equal to or less than the reference value, and can make the predetermined space an appropriate environment with respect to the concentration of carbon dioxide.

In the information processing device 20, the output control unit 25 warns when it is estimated that the carbon dioxide concentration exceeds a preset second threshold value based on the change in the carbon dioxide concentration acquired by the acquisition unit 23. May be controlled to output.
The information processing device 20 can estimate the future concentration of carbon dioxide based on the change in the concentration of carbon dioxide. The information processing device 20 can output a warning when the amount of change exceeds the second threshold value, that is, when the estimated future carbon dioxide concentration exceeds the threshold value. As a result, the information processing apparatus 20 can make the concentration of carbon dioxide in the predetermined space equal to or less than the reference value, and can make the predetermined space an appropriate environment with respect to the concentration of carbon dioxide.

In the information processing device 20, the reception unit 22 may receive the concentration of carbon dioxide measured in a predetermined space at a predetermined interval. The acquisition unit 23 may acquire the amount of change in the concentration of carbon dioxide per unit time based on the concentration of a plurality of carbon dioxide received by the reception unit 22 over time.
As a result, the information processing apparatus 20 has the number of people in the predetermined space and the predetermined number of people in the predetermined space at the stage where the concentration of carbon dioxide in the predetermined space gradually increases (before the concentration of carbon dioxide becomes a steady state). It is possible to estimate future carbon dioxide concentrations in space.

The information processing system 1 includes an output unit that outputs information, a measurement unit 10 that measures the concentration of carbon dioxide in a predetermined space and outputs measurement information, a storage unit 27 that stores reference change information, and a measurement unit 10. Based on the reception unit 22 that receives the measurement information from the reception unit 22 and the measurement information received by the reception unit 22, the concentration of carbon dioxide in the first hour and the concentration of carbon dioxide in the second hour that is time before the first hour. And the acquisition unit 23 that acquires the change in concentration in the first time and the second time, the change in the concentration of carbon dioxide acquired by the acquisition unit 23, and the reference change information stored in the storage unit 27. Based on this, it includes an estimation unit 24 that estimates the number of people in a predetermined space, and an output control unit 25 that controls the number of people estimated by the estimation unit 24 to be output from the output unit.
As a result, the information processing system 1 can estimate the number of people in the room at an early stage based on the concentration of carbon dioxide in the predetermined space.
Further, even if there are a plurality of measuring units 10, the information processing system 1 estimates based on the concentration of carbon dioxide measured by which measuring unit 10 by including, for example, identification information for identifying the measuring unit 10 in the measurement information. It is possible to identify whether it is the number of people (future carbon dioxide concentration). For example, when the measuring unit 10 is arranged in each of the plurality of spaces, the information processing system 1 can specify in which space the number of people (future carbon dioxide concentration) is estimated.

In the information processing method, a computer having a storage unit 27 for storing reference change information receives a carbon dioxide concentration measured in a predetermined space in a reception step, and a carbon dioxide concentration in the first hour received by the reception step. And the acquisition step of acquiring the change in concentration based on the concentration of carbon dioxide in the second time before the first hour, the change in the concentration of carbon dioxide acquired by the acquisition step, and the storage unit. Based on the reference change information stored in 27, an estimation step for estimating the number of people in a predetermined space and an output control step for controlling to output the number of people estimated by the estimation step are executed. ..
Thereby, the information processing method can estimate the number of people in the room at an early stage based on the concentration of carbon dioxide in the predetermined space.

The information processing program has a storage function for storing reference change information in a computer, a reception function for receiving the concentration of carbon dioxide measured in a predetermined space, and a carbon dioxide concentration in the first hour received by the reception function. , The acquisition function to acquire the change in concentration based on the concentration of carbon dioxide in the second hour before the first hour, the change in the concentration of carbon dioxide acquired by the acquisition function, and the memory function. Based on the stored reference change information, an estimation function for estimating the number of people in a predetermined space and an output control function for controlling the number of people estimated by the estimation function to be output are realized.
As a result, the information processing program can estimate the number of people in the room at an early stage based on the concentration of carbon dioxide in a predetermined space.

Each part of the information processing apparatus 20 described above may be realized as a function of a computer arithmetic processing unit or the like. That is, even if the reception unit 22, the acquisition unit 23, the estimation unit 24, and the output control unit 25 of the information processing device 20 are realized as a reception function, an acquisition function, an estimation function, and an output control function by a computer arithmetic processing unit or the like, respectively. good.
The information processing program can realize each of the above-mentioned functions in a computer. The information processing program may be recorded on a non-temporary recording medium that can be read by a computer, such as an external memory or an optical disk.
Further, as described above, each part of the information processing device 20 may be realized by a computer arithmetic processing device or the like. The arithmetic processing unit and the like are configured by, for example, an integrated circuit and the like. Therefore, each part of the information processing device 20 may be realized as a circuit constituting an arithmetic processing unit or the like. That is, the reception unit 22, the acquisition unit 23, the estimation unit 24, and the output control unit 25 of the information processing device 20 are realized as a reception circuit, an acquisition circuit, an estimation circuit, and an output control circuit that constitute a computer arithmetic processing unit or the like. May be good.
Further, the communication unit 26, the display unit 28, and the storage unit 27 (output unit) of the information processing device 20 may be realized as, for example, a communication function including a function of an arithmetic processing unit, a display function, and a storage function (output function). good. Further, the communication unit 26, the display unit 28, and the storage unit 27 (output unit) of the information processing device 20 are realized as a communication circuit, a display circuit, and a storage circuit (output circuit) by being composed of, for example, an integrated circuit or the like. You may. Further, the communication unit 26, the display unit 28, and the storage unit 27 (output unit) of the information processing device 20 are configured as a communication device, a display device, and a storage device (output device) by being composed of, for example, a plurality of devices. You may.
Further, the measuring unit 10 may be realized as a measuring function including a function of, for example, an arithmetic processing unit. Further, the measuring unit 10 may be realized as a measuring circuit by being configured by, for example, an integrated circuit or the like. Further, the measuring unit 10 may be configured as a measuring device by being configured by, for example, a plurality of devices.

1 Information processing system 10 Measuring unit 20 Information processing device 21 Control unit 22 Reception unit 23 Acquisition unit 24 Estimating unit 25 Output control unit 26 Communication unit (output unit)
27 Storage unit (output unit)
28 Display (output)

Claims (9)

As the standard change of carbon dioxide concentration, the amount of change per unit time of carbon dioxide concentration when there is one person in a predetermined space is shown with the size of the space, the ventilation volume of the space and the purpose of use of the space as parameters. A storage unit that stores reference change information regarding the rate of increase,
A reception unit that accepts the concentration of carbon dioxide measured in a predetermined space,
Based on the concentration of carbon dioxide in the first hour received by the reception unit and the concentration of carbon dioxide in the second hour before the first hour, the rate of increase indicating the change in concentration is acquired. Acquisition department and
An estimation unit that estimates the number of people in a predetermined space by dividing the rate of increase in the concentration of carbon dioxide acquired by the acquisition unit by the rate of increase based on the reference change information stored in the storage unit. When,
An output control unit that controls to output the number of people estimated by the estimation unit,
Information processing device equipped with. The estimation unit determines the rate of increase of the carbon dioxide concentration acquired by the acquisition unit, which indicates a change in the carbon dioxide concentration in a relatively early stage, based on the reference change information stored in the storage unit. Estimate the number of people in a given space by dividing by the rate of increase at a relatively early stage of change
The information processing device according to claim 1. The information processing device according to claim 1 or 2, wherein the output control unit controls to output a warning when the number of people estimated by the estimation unit exceeds a preset first threshold value. The output control unit outputs a warning when it is estimated that the carbon dioxide concentration exceeds a preset second threshold value based on the rate of increase indicating the change in the carbon dioxide concentration acquired by the acquisition unit. The information processing apparatus according to any one of claims 1 to 3. The reception unit receives the concentration of carbon dioxide measured in a predetermined space at a predetermined interval, and receives the concentration of carbon dioxide.
According to any one of claims 1 to 4, the acquisition unit acquires an increase rate as a change in the concentration of carbon dioxide per unit time based on the concentration of a plurality of carbon dioxide received by the reception unit over time. The information processing device described. As a reference change of carbon dioxide concentration, the increase showing the change per unit time of carbon dioxide concentration when one person is in a predetermined space, with the size of the space, the ventilation volume of the space, and the purpose of use of the space as parameters. A storage unit that stores standard change information related to the rate,
An acquisition unit that acquires an increase rate indicating a change in concentration based on the concentration of carbon dioxide in the first hour and the concentration of carbon dioxide in the second hour before the first hour.
The number of people in a predetermined space is estimated by dividing the rate of increase indicating the change in the concentration of carbon dioxide acquired by the acquisition unit by the rate of increase based on the reference change information stored in the storage unit. Estimator and
An output control unit that controls to output the number of people estimated by the estimation unit,
Information processing device equipped with. An output unit that outputs information and
A measuring unit that measures the concentration of carbon dioxide in a predetermined space and outputs measurement information,
As a reference change of carbon dioxide concentration, the increase showing the change per unit time of carbon dioxide concentration when one person is in a predetermined space, with the size of the space, the ventilation volume of the space, and the purpose of use of the space as parameters. A storage unit that stores standard change information related to the rate,
Based on the measurement information, the concentration of carbon dioxide in the first time and the concentration of carbon dioxide in the second time time prior to the first time are obtained, and in the first time and the second time. The acquisition unit that acquires the rate of increase indicating the change in concentration,
The number of people in a predetermined space is estimated by dividing the rate of increase indicating the change in the concentration of carbon dioxide acquired by the acquisition unit by the rate of increase based on the reference change information stored in the storage unit. Estimator and
An output control unit that controls the number of people estimated by the estimation unit to be output from the output unit,
Information processing system equipped with. As a standard change of carbon dioxide concentration, the increase showing the change per unit time of carbon dioxide concentration when one person is in a predetermined space, with the size of the space, the ventilation volume of the space, and the purpose of use of the space as parameters. A computer having a storage unit that stores reference change information regarding the rate,
A reception step that accepts the concentration of carbon dioxide measured in a predetermined space,
Based on the concentration of carbon dioxide received in the reception step in the first hour and the concentration of carbon dioxide in the second hour time prior to the first hour , an increase rate indicating a change in concentration is obtained. To get the steps and
The number of people in a predetermined space is estimated by dividing the rate of increase indicating the change in the concentration of carbon dioxide acquired by the acquisition step by the rate of increase based on the reference change information stored in the storage unit. Estimating steps and
An output control step that controls to output the number of people estimated by the estimation step, and
Information processing method to execute. On the computer
As a reference change of carbon dioxide concentration, the increase showing the change per unit time of carbon dioxide concentration when one person is in a predetermined space, with the size of the space, the ventilation volume of the space, and the purpose of use of the space as parameters. A memory function that stores standard change information related to the rate,
A reception function that accepts the concentration of carbon dioxide measured in a predetermined space,
Based on the concentration of carbon dioxide received by the reception function in the first hour and the concentration of carbon dioxide in the second hour time prior to the first hour , an increase rate indicating a change in concentration is obtained. Get function and
The number of people in a predetermined space is estimated by dividing the rate of increase indicating the change in the concentration of carbon dioxide acquired by the acquisition function by the rate of increase based on the reference change information stored in the memory function. Estimate function and
An output control function that controls the number of people estimated by the estimation function to be output, and
Information processing program that realizes.

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