JP2022126994A - Information providing device, information providing system, control method, and program - Google Patents

Abstract

To provide an information providing device, an information providing system, a control method, and a program capable of providing information effective for determining a risk of secondary infection in an air-conditioned space.SOLUTION: A contact information generation portion 102 discriminates persons staying in an air-conditioned space from images of the air-conditioned space, determining distances and positional relations of the discriminated persons, and generating contact information 1062 indicating the discriminated persons, presence or absence of contact of the persons, and the positional relationships of the persons. A providing portion 104 refers to the contact information 1062 to identify one or more contact persons having contacted one or more infected persons of an infection disease, and the positional relations of the infected persons and the contact persons, identifies environment information of a period when the contact persons stay in the air-conditioned space with the infected persons, in the environment information 1061 including operation information 1063 indicating an operation state of an air conditioner and state information 1064 indicating a state of the air in the air-conditioned space, and provides the discrimination information for discriminating the contact persons, the information indicating the positional relations, and the environment information as secondary infection risk information.SELECTED DRAWING: Figure 3

Description

The present disclosure relates to an information providing device, an information providing system, a control method and a program.

In recent years, in order to grasp the infection risk of infectious diseases in daily life, there is a demand for provision of information on the infection risk. Various techniques have been proposed in response to this. For example, Patent Literature 1 discloses a technique of identifying a person who is suspected of having discharged an infectious substance such as a virus from people existing in space and displaying information about the identified person.

Japanese Patent Laid-Open No. 2019-083395

With regard to infectious diseases whose infection route is airborne infection and droplet infection, the risk of secondary infection changes depending on the air condition in the space and the positional relationship between people. In particular, in an air-conditioned space in which an air conditioner controls air conditioning, the operating conditions of the air conditioner affect the state of the air, so the risk of secondary infection changes. Therefore, in order to grasp the risk of secondary infection more accurately, it is necessary to provide information on the air condition in the air-conditioned space, the operating status of the air conditioner, the positional relationship between people, and so on.

The present disclosure has been made in view of the above circumstances, and provides an information providing device, an information providing system, a control method, and a program that can provide useful information for determining the risk of secondary infection in an air-conditioned space. intended to provide

In order to achieve the above object, the information providing device according to the present disclosure
environment information acquisition means for acquiring environment information including operating information indicating the operation status of an air conditioner that controls air conditioning in an air-conditioned space and state information indicating the state of the air in the air-conditioned space;
An image of the air-conditioned space is acquired, a person present in the air-conditioned space is identified from the acquired image, a distance and a positional relationship between the identified persons are obtained, and a distance between the identified persons and the persons is obtained. contact information generating means for generating contact information indicating the presence or absence of contact and the positional relationship between the persons;
storage means for storing the acquired environment information and the generated contact information;
Infected person information acquisition means for acquiring infected person information indicating an infected person of an infectious disease;
By referring to the stored contact information, a contact person who came into contact with the infected person related to the acquired infected person information, and a positional relationship between the infected person and the contact person are specified, and the stored contact information is specified. Among the environmental information, identifying the environmental information at the time when the contact person was present in the air-conditioned space together with the infected person, identification information for identifying the contact person, and information indicating the identified positional relationship. , the specified environment information, and a providing means for providing the above as secondary infection risk information.

According to the present disclosure, it is possible to provide an information providing device, an information providing system, a control method, and a program capable of providing useful information for determining the risk of secondary infection in an air-conditioned space.

Block diagram of an information providing system according to Embodiment 1 FIG. 2 is a block diagram showing the hardware configuration of the information providing device according to the first embodiment; FIG. 1 is a block diagram showing the functional configuration of an information providing device according to Embodiment 1; A diagram showing an example of environment information according to the first embodiment. A diagram showing an example of contact information according to the first embodiment. A diagram showing an example of infection condition information according to the first embodiment A diagram showing an example of secondary infection risk information according to the first embodiment 4 is a flowchart showing contact information generation processing executed by the information providing device according to the first embodiment; 4 is a flowchart showing information providing processing executed by the information providing device according to the first embodiment; 4 is a flowchart showing infection risk value calculation processing executed by the information providing apparatus according to the first embodiment; Block diagram of an information providing system according to Embodiment 2 A diagram showing an example of secondary infection information according to the second embodiment 8 is a flowchart showing information providing processing executed by the information providing apparatus according to the second embodiment;

(Embodiment 1)
The information providing system 1 according to Embodiment 1 is a system that provides information on the risk of secondary infection.

As shown in FIG. 1 , the information providing system 1 includes one or more information providing devices 100 and one or more air conditioners 200 . Information providing apparatus 100 is communicably connected to air conditioner 200 via network 500 .

The information providing apparatus 100 determines the risk of secondary infection of the person 400 present in the air-conditioned space 300 based on the operation information of the air conditioner 200 and the state of the air in the air-conditioned space 300 transmitted from the air conditioner 200. provide information about The information providing device 100 is, for example, a system controller having a function of controlling the air conditioner 200 .

The air conditioner 200 controls air conditioning of the air-conditioned space 300 . The air conditioner 200 includes one or more indoor units 201 and one or more outdoor units 202 . The indoor unit 201 is arranged inside the air-conditioned space 300 , and the outdoor unit 202 is arranged outside the air-conditioned space 300 . The air conditioner 200 transmits operating information indicating the operating state to the information providing device 100 at a predetermined cycle.

The air conditioner 200 also includes a camera 203 that acquires an image of the air-conditioned space 300 and various sensors that acquire information indicating the state of the air in the air-conditioned space 300 . The sensors are, for example, a temperature and humidity sensor 204 that detects the temperature and humidity of the air-conditioned space 300, a CO2 concentration sensor 205 that detects the concentration of carbon dioxide, and a VOC concentration sensor 206 that detects the concentration of volatile organic compounds. . The camera 203, the temperature/humidity sensor 204, the CO2 concentration sensor 205, and the VOC concentration sensor 206 acquire an image of the air-conditioned space 300 and information indicating the state of the air at predetermined intervals. The camera 203 and various sensors are communicably connected to the indoor unit 201 and transmit the acquired information to the information providing apparatus 100 via the indoor unit 201 .

The network 500 is a wireless or wired communication network, such as the Internet, an intranet, an extranet, a LAN (Local Area Network), a VPN (Virtual Private Network), a telephone line network, or the like.

Next, the hardware configuration of the information providing apparatus 100 will be described with reference to FIG.

First, the hardware configuration of the information providing apparatus 100 will be described. The information providing apparatus 100 includes a processor 11 that executes various processes, a main storage section 12 that is used as a work area for the processor 11, an auxiliary storage section 13 that stores various data used in the processing of the processor 11, an external , an input unit 15 for acquiring input information, an output unit 16 for presenting various information, and an RTC (Real Time Clock) 17 for timekeeping. The main storage unit 12 , auxiliary storage unit 13 , communication unit 14 , input unit 15 , output unit 16 and RTC 17 are all connected to processor 11 via bus 18 .

The processor 11 includes a CPU (Central Processing Unit). The processor 11 implements various functions of the information providing device 100 by executing programs stored in the auxiliary storage unit 13 .

The main storage unit 12 includes a RAM (Random Access Memory). A program is loaded from the auxiliary storage unit 13 into the main storage unit 12 . The main storage unit 12 is used as a work area for the processor 11 .

Auxiliary storage unit 13 includes a nonvolatile memory typified by EEPROM (Electrically Erasable Programmable Read-Only Memory). The auxiliary storage unit 13 stores various data used for the processing of the processor 11 in addition to programs. Auxiliary storage unit 13 supplies data used by processor 11 to processor 11 and stores the data supplied from processor 11 in accordance with instructions from processor 11 .

The communication unit 14 includes a network interface circuit for communicating with external devices. The communication unit 14 receives a signal from an external device and outputs data indicated by this signal to the processor 11 . Also, the communication unit 14 transmits a signal indicating the data output from the processor 11 to an external device.

The input unit 15 includes input devices such as input keys and a pointing device. The input unit 15 acquires information input by the user of the information providing apparatus 100 and notifies the processor 11 of the acquired information.

The output unit 16 includes an output device such as an LCD (Liquid Crystal Display) and a speaker. The output unit 16 may configure a touch screen integrally formed with the pointing device that configures the input unit 15 . The output unit 16 presents various information to the user according to instructions from the processor 11 .

The RTC 17 is a timekeeping device having an oscillation circuit using a crystal oscillator. The RTC 17 incorporates a battery, for example, and keeps time even while the information providing apparatus 100 is powered off.

Next, functions of the information providing apparatus 100 will be described with reference to FIG.

The information providing apparatus 100 is functionally composed of an environment information acquisition unit 101 that acquires environment information 1061 from the air conditioner 200, and a contact information generation unit 102 that generates contact information 1062 regarding a person present in the air-conditioned space 300. , an infected person information acquisition unit 103 that acquires infected person information, a provision unit 104 that provides information on the risk of secondary infection, an infection risk calculation unit 105 that calculates an infection risk value, environment information 1061 and contact information 1062 and a storage unit 106 for storing.

The environment information acquisition unit 101 acquires environment information 1061 . The environment information 1061 is information including operation information 1063 indicating the operation status of the air conditioner 200 that controls the air conditioning of the air-conditioned space 300 and state information 1064 indicating the state of the air in the air-conditioned space 300 . The environment information acquisition unit 101 is implemented by the cooperation of the processor 11 and the communication unit 14 . Note that the environment information acquisition unit 101 is an example of environment information acquisition means.

The operating information 1063 is, for example, information indicating the blowing strength of the air conditioner 200 . The state information 1064 is information indicating values detected by the temperature/humidity sensor 204, the CO2 concentration sensor 205, and the VOC concentration sensor 206, for example. The information on the strength of the blowing air is used to determine whether or not the person is in contact, which will be described later. The information detected by the temperature/humidity sensor 204 is used to calculate the risk value, which will be described later. Information detected by the VOC concentration sensor 206 is used to determine whether or not the space to be air-conditioned is ventilated, which will be described later. Environmental information acquisition unit 101 receives operation information 1063 and state information 1064 from air conditioner 200 at a predetermined cycle, and stores the received information in storage unit 106 .

FIG. 4 shows an example of the environment information 1061. As shown in FIG. The environmental information 1061 includes driving information 1063 and state information 1064 in association with each other. Specifically, the environmental information 1061 corresponds to the time when each value was acquired, the strength of the air blown from the air conditioner 200, the temperature, humidity, CO2 concentration, and VOC concentration of the air-conditioned space 300. included with. The first row of the table in FIG. 4 shows that at the time “September 14, 2020, 9:00:00”, the air conditioner 200 is operated with the blowing intensity of “strong”, and the temperature of the air-conditioned space 300 is is "20° C.", humidity is "58%", CO2 concentration is "900 ppm", and VOC concentration is "0.03 ppm".

The contact information generation unit 102 acquires an image of the air-conditioned space 300, identifies people present in the air-conditioned space 300, and obtains the distance and positional relationship between the identified people. Then, the contact information generation unit 102 generates contact information indicating the presence or absence of contact between people and the positional relationship. A process for generating contact information is performed at regular time intervals. This certain period of time can be arbitrarily determined by the user of the information providing apparatus 100, and is determined, for example, in consideration of the time when the possibility of infection is judged to be high. Hereinafter, this certain period of time will be referred to as a "first period" and shall be 7.5 minutes. The contact information generation unit 102 is implemented by the cooperation of the processor 11 and the communication unit 14 . It should be noted that the contact information generating unit 102 is an example of contact information generating means.

Here, it is assumed that the air-conditioned space 300 is an indoor space used by a specific person, such as an office or a school. A plurality of seats are provided in the air-conditioned space 300, and the position information of the seats in the space and the identification information for identifying the person to whom the seat is assigned are associated and stored in the storage unit 106. Suppose you are Hereinafter, information in which seat position information and person identification information are associated is referred to as seat information. For example, assume that "person A", "person B", "person C", . . . are assigned "seat A," "seat B," "seat C," . The contact information generator 102 identifies a person present in the air-conditioned space 300 based on the position of the person obtained from the image of the air-conditioned space 300 and the seat information.

Specifically, the contact information generation unit 102 analyzes the image acquired from the camera 203 and determines whether or not a plurality of people are present in the air-conditioned space 300 . When the contact information generation unit 102 determines that a plurality of people are present, the contact information generation unit 102 obtains the positions of the people in the air-conditioned space 300, refers to the seat information, and selects the seat closest to the position where the people are present. Identify existing seats. Next, the contact information generation unit 102 refers to the seat information, obtains identification information associated with the identified seat, and identifies the person indicated by the identification information as a person present in the air-conditioned space 300 . For example, when the contact information generation unit 102 determines that the seat closest to the position where the person is present is "seat A", the contact information generation unit 102 identifies the person present in the air-conditioned space 300 as "person A".

Next, the contact information generation unit 102 obtains the distance between people existing in the air-conditioned space 300 . For example, when the identified persons are “Person A” and “Person B”, the contact information generation unit 102 refers to the seat information to determine “Seat A” and “Seat A” of “Person A” and “Person B”. The position information of "B" is obtained, and the distance between "seat A" and "seat B" is obtained as the distance between "person A" and "person B". Note that the contact information generation unit 102 may obtain the distance between “person A” and “person B” by analyzing an image instead of using the position information of the seat.

Then, the contact information generation unit 102 determines whether or not the people present in the air-conditioned space 300 are positioned close to each other for a certain period of time. For example, the contact information generation unit 102 compares the analysis result of the most recently acquired image with the analysis result of the image immediately before the most recently acquired image, and determines whether or not the same person is included in both images. to judge whether When it is determined that a plurality of the same persons are included, it is determined whether or not the distance between the same persons is continuously short. Whether or not the distance is short is determined by whether or not the distance between the people exceeds a predetermined distance threshold. The predetermined distance threshold is, for example, a value indicating the distance at which there is a risk of droplet infection, and is set to "1 m".

For example, when the contact information generation unit 102 determines that both images include “Person A” and “Person B” based on the analysis result of the most recently acquired image and the analysis result of the previous image, Person A” and “person B” are assumed to exist in the same air-conditioned space 300 continuously. Then, the contact information generation unit 102 determines that the distance between “person A” and “person B” is equal to or less than the distance threshold “1 m” from the analysis result of the most recently acquired image, and from the analysis result of the previous image, If the distance between “Person A” and “Person B” is determined to be less than the distance threshold “1 m”, “Person A” and “Person B” are considered to have been positioned close to each other during the first period. , "Person B" is a contact of "Person A" and "Person A" is a contact of "Person B".

In addition, the contact information generation unit 102 obtains the positional relationship between the people existing in the air-conditioned space 300 . The positional relationship is represented, for example, by the items "leeward", "windward" and "others". "Leeward" indicates a positional relationship in which one person is located leeward of the other person, "Windward" indicates a positional relationship in which one person is located on the windward side of the other person, and "Others" indicates a positional relationship. , “leeward”, and “windward”. For example, when the air conditioner 200 is blowing air, that is, when the blowing strength in FIG. , the positional relationship is obtained.

Even if the contact information generation unit 102 determines that the distance between the persons exceeds a predetermined distance threshold, if one person exists downwind of the other person, the contact information generation unit 102 determines that the person is a contact person. For example, when the distance between “person A” and “person B” exceeds “1 m” but is less than “2 m”, the contact information generation unit 102 determines that “person B” exists downwind of “person A”. Upon determination, "Person B" is determined to be a contact of "Person A", and "Person A" is a contact of "Person B".

In addition, the contact information generation unit 102 determines that the distance between “person A” and “person B” exceeds “2 m”, but “person B” exists downwind of “person A” and the wind is blown. When the intensity is "strong", it is determined that "person B" is a contact of "person A" and "person A" is a contact of "person B".

Further, the contact information generation unit 102 determines whether the identified person is wearing a mask from the acquired image.

After identifying the contact person, the contact information generation unit 102 generates contact information for each contact person and stores the contact information in the storage unit 106 .

FIG. 5 shows an example of contact information. The contact information in FIG. 5 is contact information about "Person A". The contact information includes the time when it was determined that there was a contact person, information specifying the contact person who contacted "person A", information indicating the positional relationship of "leeward", "windward" and "other", Information indicating whether or not “Person A” is wearing a mask is included in association with the information. The first row of the table in FIG. The person positioned above is "Person C", and "Person A" was wearing a mask at this time.

The contact information generating unit 102 generates contact information as shown in FIG. 5 for each of "person A," "person B," "person C," . The contact information stored in the unit 106 is deleted after a certain period of time, which can be arbitrarily determined by the user of the information providing apparatus 100. In the present embodiment, this certain period of time is defined as an infection. Let the incubation period of the disease be a well-lapsed period, for example 14 days.

The infected person information acquisition unit 103 in FIG. 3 acquires infected person information indicating an infected person of an infectious disease. The infected person information acquisition unit 103 is implemented by the processor 11, the communication unit 14, and the input unit 15 working together. In addition, the infected person information acquisition unit 103 is an example of an infected person information acquisition unit.

For example, when a person infected with a certain infectious disease occurs and the infected person is "Person A", the user of the information providing apparatus 100 uses the input unit 15 to enter the infected person information indicating the infected person "Person A". , and the infected person information acquisition unit 103 acquires infected person information indicating the infected person “Person A”. Alternatively, the infected person information acquisition unit 103 may receive input of infected person information via a terminal device capable of communicating with the information providing device 100 .

The providing unit 104 refers to the stored contact information 1062 to identify the contact person who came into contact with the infected person related to the acquired infected person information, and the positional relationship between the infected person and the contact person. In addition, the providing unit 104 identifies the environmental information of the period when the contact person was present in the air-conditioned space 300 together with the infected person, among the stored environmental information 1061 . Then, the providing unit 104 provides the identified identification information of the contact person, the identified information indicating the positional relationship, and the identified environmental information as the secondary infection risk information. Secondary infection risk information indicates information about the risk of secondary infection for contacts of an infected person. In addition, the providing unit 104 further provides the infection risk value calculated by the infection risk calculating unit 105 as secondary infection risk information. The providing unit 104 is implemented by the processor 11, the communication unit 14, and the output unit 16 working together. Note that the providing unit 104 is an example of providing means.

Specifically, when the infected person information is acquired, the providing unit 104 searches the contact information 1062 stored in the storage unit 106 to identify the contact person. For example, when infected person information indicating an infected person “person A” is acquired, the providing unit 104 refers to the contact information in FIG. , “Person C”, “Person D”, “Person E”, . In addition, the providing unit 104 also identifies the positional relationship indicating that the contact person was located "upwind", "downwind" or "other" of the infected person "person A".

Next, the providing unit 104 obtains the time of contact between the infected person and the contact person from the contact information 1062, searches the environment information 1061 stored in the storage unit 106, and identifies the environment information at the time of contact. For example, the time when the infected person “Person A” contacted the contact person “Person B” is “9:00:00 on September 14, 2020” and “9:07:30 on September 14, 2020”. , “9:15:00 on September 14, 2020”, . and VOC concentration.

Next, the infection risk calculation unit 105 in FIG. 3 calculates an infection risk value indicating the risk of secondary infection of the contact from the state information when the contact was present in the air-conditioned space 300 and the infection condition information. calculate. The infection risk value is calculated using the risk value included in the infection condition information, as described later. The infection risk calculator 105 is implemented by the processor 11 . The infection risk calculation unit 105 is an example of infection risk calculation means.

Here, the infection condition information is information in which the condition of the air condition in which there is a possibility of being infected with an infectious disease and the risk value indicating the risk of infection are associated with each other. For example, the infection condition information is information in which conditions for activating pathogens in the air and risk values are associated with each other. A higher risk value indicates a higher risk of infection, eg, higher values are assigned closer to pathogen activation conditions. The infection condition information is stored in the storage unit 106 for each pathogen type of infectious disease.

FIG. 6 shows an example of infection condition information. The infection condition information in FIG. 6 indicates the risk value for the conditions for activating the pathogen X, and indicates the state of the air in which the pathogen X is activated by temperature and humidity. In the infection condition information of FIG. 6, risk values are associated with combinations of air temperature and humidity. For example, if pathogen X is activated at a temperature of "less than 23° C." and a humidity of "less than 50%," then a higher numerical risk value is assigned to a combination of temperature and humidity that approaches this condition.

The infection risk calculator 105 refers to the infection condition information and obtains the risk value from the state information included in the environment information specified by the provider 104 . For example, when the temperature is “20° C.” and the humidity is “58%” at “09:00:00 on September 14, 2020”, the infection risk calculation unit 105 refers to the infection condition information in FIG. Then, a risk value of "1" is obtained.

Here, the infection risk calculator 105 corrects the risk value based on whether the air-conditioned space is ventilated and whether the infected person wears a mask.

In general, when the air-conditioned space 300 is ventilated, the risk of infection is reduced. Therefore, when the air-conditioned space 300 is being ventilated, the infection risk calculation unit 105 corrects the risk value obtained from the state information to decrease. Here, the information for determining whether or not the space to be air-conditioned is ventilated is information on the concentration of carbon dioxide detected by the CO2 concentration sensor 205 and information on the concentration of volatile organic compounds detected by the VOC concentration sensor 206. information. For example, when the concentration of carbon dioxide detected by the CO2 concentration sensor 205 is below a predetermined first concentration, or when the concentration of volatile organic compounds detected by the VOC concentration sensor 206 is below a second predetermined concentration, If it is less than that, it is considered that ventilation is present in the air-conditioned space 300 . The first density and the second density can be arbitrarily set by the user of the information providing apparatus 100 based on the number of people present in the air-conditioned space 300, the size of the air-conditioned space 300, and the like.

For example, the infection risk calculation unit 105 refers to the contact information in FIG. Determine whether ventilation was provided during When the infection risk calculation unit 105 determines that the concentration detected by the CO2 concentration sensor 205 at this time falls below the first concentration or the concentration detected by the VOC concentration sensor 206 falls below the second concentration, the risk value is “1”. , for example, a predetermined first correction value "-0.1" is added to correct the risk value to "0.9".

Also, in general, if an infected person wears a mask, the risk of infection is reduced. Therefore, the infection risk calculation unit 105 corrects the risk value to decrease.

For example, the infection risk calculation unit 105 refers to the contact information in FIG. Then, it is determined whether or not the infected person "Person A" is wearing a mask. Since the infected person “Person A” is wearing a mask at this time, the infection risk calculation unit 105 converts the corrected risk value “0.9” to the predetermined second correction value “−0”, for example. .2” to correct for a risk value of “0.7”.

Note that the predetermined first correction value and second correction value can be arbitrarily set by the user of the information providing apparatus 100 . Also, the correction may be made based on only one of the information on the presence or absence of the mask and the presence or absence of ventilation.

The infection risk calculation unit 105 obtains a risk value for each time when it is determined from the contact information that the infected person and the contact person came into contact with each other. The infection risk calculation unit 105 regards the time during which the risk value is equal to or greater than a predetermined risk threshold as the contact time during which the infected person and the contact person are in contact, and totals the contact time for each contact person. Then, the infection risk calculator 105 calculates an infection risk value based on the accumulated time. Specifically, the infection risk calculation unit 105 calculates an infection risk value indicating that the risk of secondary infection increases as the cumulative value of contact time equal to or greater than the risk threshold increases. For example, if the condition for the time to be judged as a close contact of an infected person is "15 minutes", the infection risk value of the contact with the accumulated contact time of "15 minutes or more" is "high", The infection risk value for contacts with a cumulative contact time of “less than 15 minutes and 7 minutes and 30 seconds or longer” is set to “medium”, and the infection risk value for contacts with a cumulative contact time of “less than 7 minutes and 30 seconds” is set to “ small”.

The provision unit 104 provides information on the identified contact person, environmental information when the contact person was present in the air-conditioned space together with the infected person, information on the identified positional relationship, and the infection risk calculated by the infection risk calculation unit 105. and are provided as secondary infection risk information.

FIG. 7 shows an example of secondary infection risk information. The secondary infection risk information in FIG. 7 is information relating to the secondary infection risk of a person determined to be a contact of the infected person "Person A". The secondary infection risk information includes contact identification information, environmental information when the contact came into contact with the infected person, the positional relationship between the contact and the infected person, and an infection risk value in association with each other. . The first row of the table in FIG. temperature is 20°C, humidity is 48%, CO2 concentration is 1200 ppm, VOC concentration is 0.03 ppm, and contact person B is located downwind of infected person A. , indicating that the infection risk value is “high”. Each value of the environmental information included in the secondary infection risk information represents the operating status of the air conditioner 200 and the state of the air during the cumulative contact time, such as the average, median, and mode of the cumulative contact time. is the value to

The providing unit 104 displays the secondary infection risk information as shown in FIG. 7 on the display of the information providing apparatus 100, for example. Alternatively, the providing unit 104 may transmit the secondary infection risk information of FIG. 7 to a terminal device capable of communicating with the information providing device 100. FIG.

Storage unit 106 in FIG. 3 stores environment information 1061 , contact information 1062 , and infection condition information 1065 . Storage unit 106 is implemented by auxiliary storage unit 13 . Note that the storage unit 106 is an example of storage means.

Next, processing executed by the information providing apparatus 100 according to this embodiment will be described with reference to flowcharts of FIGS. 8 to 10. FIG. First, contact information generation processing executed by the contact information generation unit 102 of the information providing apparatus 100 will be described using the flowchart of FIG.

The contact information generation unit 102 determines whether or not the first period has passed (step S101). When the contact information generation unit 102 determines that the first period has passed (step S101; YES), it acquires an image from the camera 203 (step S102). On the other hand, when the contact information generating unit 102 determines that the first period has not passed (step S101; NO), it waits as it is.

The contact information generation unit 102 analyzes the image acquired from the camera 203 and extracts a person present in the air-conditioned space 300 (step S103). Then, the contact information generation unit 102 determines whether or not a plurality of people are present in the air-conditioned space 300 (step S104).

When the contact information generation unit 102 determines that a plurality of people are present in the air-conditioned space 300 (step S104; YES), the contact information generation unit 102 identifies the people present in the air-conditioned space 300, and calculates the distance and positional relationship between the people. (step S105). On the other hand, when the contact information generating unit 102 determines that there are not a plurality of people in the air-conditioned space 300 (step S104; NO), the contact information generating process ends.

The contact information generation unit 102 determines whether or not the contact person has been identified (step S106). Specifically, the contact information generation unit 102 determines whether or not the people present in the air-conditioned space 300 are positioned close to each other for a certain period of time, and determines whether or not the persons who are judged to be positioned close to each other for a certain period of time. identified as a contact. When the contact information generation unit 102 determines that the contact person has been specified (step S106; YES), the contact information generation unit 102 generates contact information for each contact person and stores the contact information in the storage unit 106 (step S107). On the other hand, when the contact information generation unit 102 determines that the contact person has not been identified (step S106; NO), the contact information generation process ends.

Next, information providing processing executed by the information providing apparatus 100 will be described using the flowchart of FIG.

The infected person information acquisition unit 103 acquires infected person information indicating an infected person of an infectious disease (step S201). The providing unit 104 searches for the contact information stored in the storage unit 106, and identifies contacts of the infected person related to the acquired infected person information (step S202). Then, the providing unit 104 obtains the time when the infected person and the contact person came into contact from the contact information, searches the environmental information stored in the storage unit 106, and identifies the environmental information at the time of contact (step S203). .

Next, the infection risk calculation unit 105 calculates an infection risk value indicating the risk of secondary infection from the state information when the contactor was in the air-conditioned space 300 and the infection condition information (step S204). . The infection risk value calculation process executed by the infection risk calculator 105 will be described with reference to the flowchart of FIG.

The infection risk calculation unit 105 obtains a risk value from the infection condition information and the state information included in the environment information specified by the provision unit 104 at each time when the infected person and the contact person come into contact with each other. (Step S301). Next, the infection risk calculator 105 corrects the risk value based on whether the infected person wears a mask, the CO2 concentration value, and the VOC concentration value (step S302). The infection risk calculation unit 105 accumulates contact times for which the risk value is equal to or greater than the risk threshold (step S303). Then, an infection risk value is calculated based on the accumulated contact time (step S304).

Returning to step S205 in FIG. The obtained infection risk value is provided as secondary infection risk information (step S205).

According to this embodiment, information indicating the air condition in the air-conditioned space, operating status of the air conditioner, and information indicating the positional relationship between the infected person and the contact person are provided together with the information of the contact person of the infected person. can provide useful information for determining the risk of secondary infection. As a result, not only the presence or absence of contact based on the distance, but also the air condition in the air-conditioned space, the operating status of the air conditioner, and the positional relationship between the infected person and the contact person are taken into account to reduce the risk of secondary infection. It is possible to make an accurate judgment and to prevent the spread of infection by promptly isolating those who are at risk of secondary infection.

Moreover, according to the present embodiment, it is possible to provide an infection risk value indicating the risk of secondary infection, which is calculated based on the state of the air in the air-conditioned space, for the contact person. Furthermore, it is possible to provide an infection risk value considering whether the infected person wears a mask and whether the air-conditioned space is ventilated. This makes it possible to more accurately indicate the risk of secondary infection.

In addition, according to the present embodiment, it is possible to specify a contact person in consideration of the positional relationship between an infected person and a contact person. This makes it possible to more accurately identify those at risk of secondary infection.

(Embodiment 2)
The information providing system 1 according to the second embodiment is a system that updates infection condition information based on secondary infection information.

As shown in FIG. 11, the information providing system 1 according to the second embodiment is obtained by adding a server device 600 to the information providing system 1 of the first embodiment. Differences from the information providing system 1 of the first embodiment will be described below.

The infected person information acquisition unit 103 acquires secondary infected person information indicating a secondary infected person of an infectious disease. For example, when a person infected with a certain infectious disease occurs, and the infected person is “Person A” and the secondary infected persons are “Person B” and “Person D”, the user of the information providing apparatus 100 inputs the input unit 15 is used to input the secondary infected person information indicating the secondary infected persons “Person B” and “Person D”, and the infected person information acquisition unit 103 acquires the secondary infected persons “Person B” and “Person D” Acquire the secondary infected person information shown. Hereinafter, the secondary infected persons of the infected person "person A" are called "person B" and "person D", and the contacts who are not the secondary infected persons but are "person C" and "person E".

The contact information generation unit 102 generates state information about the time when the secondary infected person was present in the air-conditioned space 300 together with the infected person, and the contact information of the infected person who is a contact person other than the secondary infected person. Secondary infection information is generated that includes state information about the time when the object existed in the target space 300 . In other words, the secondary infection information is information indicating a situation in which secondary infection has occurred and a situation in which it has not occurred. The secondary infection information includes information indicating the presence or absence of occurrence of secondary infection, status information, and information on the total contact time between the infected person and the contacts including the secondary infected person.

For example, when the infected person information acquisition unit 103 acquires the secondary infected person information indicating the secondary infected person “person B” as a secondary infected person of the infected person “person A”, the contact information generation unit 102 , the contact information 1062 is referred to identify the time when the secondary infected person “Person B” came into contact with the infected person “Person A”, and the environment information 1061 is referred to obtain the temperature and humidity at the identified time. . Then, the contact information generation unit 102 obtains the total contact time of the secondary infected person "person B" and the infected person "person A" in the air-conditioned space 300 with the obtained temperature and humidity. The contact information generation unit 102 similarly obtains the temperature and humidity at the time of contact, and the total contact time for those who came into contact with the infected person "Person A", although they are not secondary infected persons.

FIG. 12 shows an example of secondary infection information. The secondary infection information in FIG. 12 shows the secondary infection information about the infected person "Person A". The secondary infection information includes information indicating the presence or absence of secondary infection, status information, and accumulated contact time in association with each other. The status information and the contact time information associated with the records of “Yes”, “Yes”, “No”, and “No” in the column of presence/absence of secondary infection in FIG. ", "Person D", contacts "Person C", and "Person E". Secondary infection information does not include information that identifies an individual. In the first row of the table in FIG. 12, the temperature of the air-conditioned space 300 where the secondary infected person occurred is "20° C.", the humidity is "58%", and the infected person in the air-conditioned space 300 with such air conditions and the cumulative contact time of the secondary infected person was "15 minutes".

The provision unit 104 transmits the generated secondary infection information to the server device 600 .

The server device 600 accumulates secondary infection information received from the information providing device 100 . The server device 600 can accumulate secondary infection information received from various information providing devices 100, and can accumulate as big data the situation in which secondary infection has occurred and the situation in which secondary infection has not occurred. The infection condition information is updated based on the accumulated secondary infection information at the instruction of the user of the server device 600 or at a predetermined timing. Updating of infection condition information is performed by known techniques such as machine learning. For example, based on the accumulated secondary infection information, the server device 600 identifies the air condition in which secondary infection actually occurred and the air condition in which secondary infection did not occur. Update information risk values. That is, server device 600 uses the accumulated secondary infection information to update infection condition information that more accurately indicates the risk of infection.

After updating the infection condition information, the server device 600 transmits it to the information providing device 100 .

The providing unit 104 receives updated infection condition information from the server device 600 and stores the updated infection condition information in the storage unit 106 .

The infection risk calculator 105 calculates an infection risk value using the updated infection condition information.

Next, information providing processing executed by the information providing apparatus 100 in this embodiment will be described using the flowchart of FIG. Step S401 in the flowchart of FIG. 13 indicates the processing of steps S201 to S205 in FIG.

When the process of step S401 ends, the infected person information acquisition unit 103 determines whether or not a certain period of time has passed (step S402). Hereinafter, this fixed period is referred to as a second period. When the infected person information acquiring unit 103 determines that the second period has passed (step S402; YES), it requests the input of secondary infected person information indicating the secondary infected person of the infectious disease (step S403). Here, for the input request, an input image for inputting the secondary infected person information is displayed on the display of the information providing apparatus 100 . Alternatively, a message requesting the input may be sent to the pre-registered user's e-mail address, or a smartphone application may be notified. On the other hand, when the infected person information acquisition unit 103 determines that the second period has not passed (step S402; NO), it stands by.

Next, the infected person information acquisition unit 103 determines whether or not input of secondary infected person information has been received (step S404). When the infected person information acquiring unit 103 determines that the input of the secondary infected person information has been received (step S404; YES), the contact information generating unit 102 generates secondary infection information (step S405). On the other hand, when the infected person information obtaining unit 103 determines that the input of the secondary infected person information has not been received (step S404; NO), the information providing process ends. The provision unit 104 transmits the generated secondary infection information to the server device 600 (step S406).

According to the present embodiment, it is possible to accumulate as big data information on the air conditions in air-conditioned spaces in which secondary infected persons occur and in which secondary infected persons do not occur. As a result, even if the properties of infectious disease-causing pathogens have not been elucidated, it is possible to know the tendency of infectious diseases to occur through big data analysis. By reflecting the tendency obtained by the analysis in the calculation of the infection risk value, it is possible to provide more accurate secondary infection risk information.

(Modification)
Although the embodiments of the present disclosure have been described above, various modifications and applications are possible in carrying out the present disclosure.

In the above-described embodiment, a system controller having a function of controlling the air conditioner 200 was taken as an example of the information providing device 100, but the information providing device 100 is not limited to this. The information providing device 100 may be implemented by, for example, a personal computer, a smart phone, a HEMS (Home Energy Management System), an AI speaker, or the like.

In the above embodiment, the camera 203, the temperature/humidity sensor 204, the CO2 concentration sensor 205, and the VOC concentration sensor 206 are communicably connected to the indoor unit 201, and the acquired information is provided via the indoor unit 201. Although it is assumed that the data is transmitted to the device 100, the present invention is not limited to this. The camera 203 and various sensors may each be communicably connected to the information providing apparatus 100 and transmit the acquired information directly to the information providing apparatus 100 .

Further, in the above embodiment, the seat position information is associated with the identification information of the person to whom the seat is assigned, but the present invention is not limited to this. For example, face recognition technology may be used to identify people present in the air-conditioned space 300 and determine the distance between the identified people. Also, each person present in the air-conditioned space 300 may possess a terminal device, and the terminal device may transmit the position information and the owner's identification information to the information providing device 100 via the network 500. . Alternatively, an application for performing contact confirmation is installed in the indoor unit 201 and the terminal device, and the indoor unit 201 acquires the position information of the terminal device and the identification information of the owner using short-range wireless communication. Then, the acquired position information and identification information may be transmitted to the information providing apparatus 100 . The information providing apparatus 100 identifies a person existing in the air-conditioned space 300 based on the received position information and identification information, and obtains the distance between the identified persons.

In the above embodiment, the information for determining whether or not the air-conditioned space 300 is ventilated is information indicating the concentration of carbon dioxide and the concentration of volatile organic compounds, but the information is not limited to this. For example, a ventilator may be installed in the air-conditioned space 300, and the information providing apparatus 100 may be communicably connected to the ventilator to acquire the operating information of the ventilator. The information providing apparatus 100 may use the acquired operating information of the ventilation device as information for determining whether or not the air-conditioned space 300 is being ventilated, and may determine whether or not the air-conditioned space 300 is being ventilated.

In the above embodiment, the infection risk calculation unit 105 corrects the risk value based on the information on whether the infected person is wearing a mask or not. do not have. For example, the contact information generation unit 102 may determine that there is no contact person when the infected person wears a mask.

Further, by applying an operation program that defines the operation of the information providing apparatus 100 according to the above embodiment to an existing personal computer or information terminal apparatus, the personal computer or information terminal apparatus can be used as the information providing apparatus 100 according to the embodiment. It is also possible to make it work.

Any method of distributing such a program may be used. For example, the program may be distributed by storing it in a computer-readable recording medium such as a CD-ROM (Compact Disk Read-Only Memory), a DVD (Digital Versatile Disk), or a memory card. or distributed over a communication network such as the Internet.

This disclosure is capable of various embodiments and modifications without departing from the broader spirit and scope of this disclosure. Moreover, the embodiments described above are for explaining the present disclosure, and do not limit the scope of the present disclosure. In other words, the scope of the present disclosure is indicated by the claims rather than the embodiments. Various modifications made within the scope of the claims and within the scope of equivalent disclosure are considered to be within the scope of the present disclosure.

INDUSTRIAL APPLICABILITY The present disclosure can provide an information providing device, an information providing system, a control method, and a program capable of providing useful information for determining the risk of secondary infection in an air-conditioned space.

1 information providing system 11 processor 12 main storage unit 13 auxiliary storage unit 14 communication unit 15 input unit 16 output unit 17 RTC 18 bus 100 information providing device 101 environmental information acquisition unit 102 contact information generation unit 103 infected person information acquisition unit 104 provision unit 105 infection risk calculation unit 106 storage unit 1061 environmental information 1062 contact information 1063 driving information 1064 state information 1065 infection condition information 200 air conditioner, 300 space to be air-conditioned, 400 people, 500 network, 600 server device.

Claims (12)

environment information acquisition means for acquiring environment information including operating information indicating the operation status of an air conditioner that controls air conditioning in an air-conditioned space and state information indicating the state of the air in the air-conditioned space;
An image of the air-conditioned space is acquired, a person present in the air-conditioned space is identified from the acquired image, a distance and a positional relationship between the identified persons are obtained, and a distance between the identified persons and the persons is obtained. contact information generating means for generating contact information indicating the presence or absence of contact and the positional relationship between the persons;
storage means for storing the acquired environment information and the generated contact information;
Infected person information acquisition means for acquiring infected person information indicating an infected person of an infectious disease;
By referring to the stored contact information, a contact person who came into contact with the infected person related to the acquired infected person information, and a positional relationship between the infected person and the contact person are specified, and the stored contact information is specified. Among the environmental information, identifying the environmental information at the time when the contact person was present in the air-conditioned space together with the infected person, identification information for identifying the contact person, and information indicating the identified positional relationship. , the specified environmental information, and a providing means for providing the above as secondary infection risk information,
Information provider. The storage means further stores infection condition information in which conditions regarding air conditions that may cause infection with the infectious disease and risk values indicating the risk of infection are associated with each other, and
Infection risk calculation for calculating an infection risk value indicating the risk of secondary infection of the contact person from state information relating to the period when the contact person was present in the air-conditioned space together with the infected person and the infection condition information. further equipped with means,
the providing means further provides the infection risk value as the secondary infection risk information;
The information providing device according to claim 1. The infection condition information is information in which conditions for activating pathogens of the infectious disease in air and the risk values are associated with each other,
The infection risk calculation means refers to the infection condition information, and the closer the air condition indicated by the condition information related to the period when the contact person was present in the air-conditioned space together with the infected person, the closer to the activation condition. , to calculate an infection risk value indicating a high risk of secondary infection,
3. The information providing device according to claim 2. The state information includes temperature and humidity information of the air-conditioned space,
The activation conditions are indicated by the temperature and humidity of the air,
The infection risk calculation means calculates that the temperature and humidity values of the air-conditioned space at the time when the contact person was present in the air-conditioned space together with the infected person approach the temperature and humidity values related to the activation condition. , to calculate an infection risk value indicating a high risk of secondary infection,
The information providing device according to claim 3. The state information further includes information for determining whether or not the space to be air-conditioned is ventilated,
The infection risk calculation means, based on the information for determining the presence or absence of ventilation, determines that there is ventilation in the air-conditioned space at the time when the contact person was present in the air-conditioned space together with the infected person. compensate to decrease the value,
5. The information providing device according to claim 4. The information for determining the presence or absence of ventilation in the air-conditioned space is information indicating the concentration of carbon dioxide in the air-conditioned space,
The infection risk calculation means determines that the air-conditioned space is ventilated when the concentration of carbon dioxide is lower than a predetermined first concentration.
6. The information providing device according to claim 5. The information for determining the presence or absence of ventilation in the air-conditioned space is information indicating the concentration of volatile organic compounds in the air-conditioned space,
The infection risk calculation means determines that the air-conditioned space is ventilated when the concentration of the volatile organic compound is lower than a predetermined second concentration.
7. The information providing device according to claim 5 or 6. The contact information generating means determines whether or not a person present in the air-conditioned space is wearing a mask from the image of the air-conditioned space,
When the infection risk calculation means determines that the infected person was wearing a mask when the contact person was present in the air-conditioned space together with the infected person, the infection risk value is corrected to decrease.
The information providing device according to any one of claims 3 to 7. The contact information generating means is
If the distance between the people is equal to or less than a predetermined distance threshold, it is determined that the people have contacted each other,
Even if the distance between the persons exceeds the predetermined distance threshold, if one of the persons is downwind of the other person, it is determined that the persons have come into contact with each other. ,
The information providing device according to any one of claims 1 to 8. environment information acquisition means for acquiring environment information including operating information indicating the operation status of an air conditioner that controls air conditioning in an air-conditioned space and state information indicating the state of the air in the air-conditioned space;
An image of the air-conditioned space is acquired, a person present in the air-conditioned space is identified from the acquired image, a distance and a positional relationship between the identified persons are obtained, and a distance between the identified persons and the persons is obtained. contact information generating means for generating contact information indicating the presence or absence of contact and the positional relationship between the persons;
Infection condition information in which the acquired environmental information, the generated contact information, the condition of air conditions that may cause infection with an infectious disease, and a risk value indicating the risk of infection are associated with each other. and a storage means for storing
Infected person information acquiring means for acquiring infected person information indicating an infected person of the infectious disease;
By referring to the stored contact information, a contact person who came into contact with the infected person related to the acquired infected person information, and a positional relationship between the infected person and the contact person are specified, and the stored contact information is specified. Among the environmental information, identifying the environmental information at the time when the contact person was present in the air-conditioned space together with the infected person, identification information for identifying the contact person, and information indicating the identified positional relationship. , the identified environmental information as secondary infection risk information;
Infection risk calculation for calculating an infection risk value indicating the risk of secondary infection of the contact person from state information relating to the period when the contact person was present in the air-conditioned space together with the infected person and the infection condition information. comprising means and
The providing means further provides the infection risk value as the secondary infection risk information,
The infected person information acquisition means further acquires secondary infected person information indicating a secondary infected person of the infectious disease,
The contact information generating means generates state information relating to the period when the secondary infected person was present in the air-conditioned space together with the infected person, and contacts of the infected person who are other than the secondary infected person. generates secondary infection information including status information related to the time when the infected person was present in the air-conditioned space together with the infected person,
The providing means transmits the secondary infection information, receives infection condition information updated based on the transmitted secondary infection information, and stores the received infection condition information in the storage means.
information system. A contact information generating means acquires an image of an air-conditioned space, identifies a person existing in the air-conditioned space from the acquired image, obtains a distance and a positional relationship between the identified persons, and determines the distance and positional relationship between the identified persons. generating contact information indicating the presence or absence of contact between the persons and the positional relationship between the persons, and storing the generated contact information in a storage means;
Infected person information acquisition means acquires infected person information indicating an infected person of an infectious disease,
The providing means refers to the contact information stored in the storage means, and provides a contact person who came into contact with the infected person related to the acquired infected person information and a positional relationship between the infected person and the contact person. Environment information including operating information indicating the operating status of an air conditioner controlling air conditioning of the air-conditioned space and state information indicating the state of the air in the air-conditioned space, which are specified and stored in the storage means Among them, the environmental information of the period when the contact person was present in the air-conditioned space together with the infected person is specified, identification information for identifying the contact person, information indicating the specified positional relationship, and provide the identified environmental information as secondary infection risk information,
control method. the computer,
environment information acquisition means for acquiring environment information including operating information indicating the operating status of an air conditioner that controls air conditioning in an air-conditioned space and state information indicating the state of the air in the air-conditioned space;
An image of the air-conditioned space is acquired, a person present in the air-conditioned space is identified from the acquired image, a distance and a positional relationship between the identified persons are obtained, and a distance between the identified persons and the persons is obtained. contact information generating means for generating contact information indicating the presence or absence of contact and the positional relationship between said persons;
storage means for storing the acquired environmental information and the generated contact information;
Infected person information acquisition means for acquiring infected person information indicating an infected person of an infectious disease;
By referring to the stored contact information, a contact person who came into contact with the infected person related to the acquired infected person information, and a positional relationship between the infected person and the contact person are specified, and the stored contact information is specified. Among the environmental information, identifying the environmental information at the time when the contact person was present in the air-conditioned space together with the infected person, identification information for identifying the contact person, and information indicating the identified positional relationship. , a providing means for providing the identified environmental information and the above as secondary infection risk information;
A program that acts as a

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