JP7308539B2 - Crowd control system - Google Patents

Description

Application of Article 30, Paragraph 2 of the Patent Law 1. October 20, 2nd year of Reiwa, tour 2. October 20, 2020, Website

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crowd control system that notifies a warning or the like and controls an environment based on the density of people in a closed space.

COVID-19 (new coronavirus infectious disease) has three conditions (the so-called "Three Cs"): "closed spaces" with poor ventilation, "crowded places" where many people gather, and "close-contact settings" where people talk or speak up close. ), the risk of cluster (group) occurrence is high, so it is required to avoid this, that is, to avoid crowding and close contact, and to perform appropriate and sufficient ventilation (Non-Patent Documents 1 to 3 ).
Here, in Patent Document 1, an air conditioner that air-conditions the room, a human detection sensor that detects the stay state of people in the room, and a person that acquires the density of people in the room based on the detection result of the human detection sensor and an air conditioning control device that controls the operation of an air conditioner based on the indoor human density acquired by the human density acquiring means. , discloses an indoor air conditioner that performs air conditioning control in which the air conditioning conditions of the air conditioner are relaxed more than in an area with a high density of people in the room.
Non-Patent Document 4 discloses a room occupancy estimation system that installs a plurality of thermopile array sensors on the ceiling to measure the temperature distribution in the room and estimates the number of people in the room and their positions.
Non-Patent Document 5 discloses a method of estimating the number of people in a room using a CO ₂ concentration sensor and a motion sensor.
Further, Patent Literatures 2 and 3 disclose a human detection method algorithm using a thermopile array sensor.

JP 2013-040693 A JP 2014-102093 A JP 2010-256045 A

“Ventilation to improve closed spaces with poor ventilation” in commercial facilities, etc., Ministry of Health, Labor and Welfare, March 30, 2020, Internet <URL: https://www.mhlw.go.jp/content /10900000/000616069.pdf＞ “Ventilation method to improve closed space with poor ventilation”, Ministry of Health, Labor and Welfare, April 3, 2020, Internet <URL: https://www.mhlw.go.jp/content/10900000/ 000618969.pdf> “Let's avoid the 3 Cs!”, Prime Minister's official residence, Ministry of Health, Labor and Welfare, Internet <URL: https://www.mhlw.go.jp/content/000645566.pdf> Masato Kuki, 4 others, “Indoor Human Monitoring System Using Thermopile Array Sensor”, Transactions of the Institute of Systems, Control and Information Engineers, Institute of Systems, Control and Information Engineers, 2014, Vol. 27, No. 4, p. 149-150 Tomokazu Tachikawa, et al., “Method for estimating the number of people in a room using environmental sensors”, Transactions of Environmental Systems, Architectural Institute of Japan, Architectural Institute of Japan, April 2010, Vol. 75, No. 650, p. 355-362

Patent Documents 1 to 3 and Non-Patent Documents 4 and 5 do not perform notification and ventilation based not only on a predetermined closed space but also on the density of people in individual areas within the closed space.
SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a congestion countermeasure system that detects the density of people not only in a predetermined closed space but also in individual areas within the closed space, and performs notification and environmental control.

The congestion countermeasure system of the present invention described in claim 1 includes a _CO2 sensor 11 that detects the _CO2 concentration in a predetermined closed space 1, and detects the presence of people in a plurality of individual areas 2 that divide the predetermined closed space 1. a ventilation device 40 having a weak operation mode and a strong operation mode to ventilate the predetermined closed space 1; a notification means 30 for notifying the density of people; and a centralized management server 80 for controlling notification by the notification means 30 and ventilation by the ventilation equipment 40. The density determination means 22 determines whether the individual area 2 and a number determination unit 22b that determines whether or not the number of people calculated by the number calculation unit 22a is equal to or greater than a reference number when the number of people calculated by the number calculation unit 22a is not zero. ₂ sensor 11 has a CO ₂ concentration determination unit 81a that determines whether or not the CO ₂ concentration detected by the sensor 11 is equal to or greater than a threshold, based on the combination of the determination result of the CO ₂ concentration determination unit 81a and the determination result of the number of people determination unit 22b. In addition to controlling ventilation by the ventilation equipment 40, if the CO ₂ concentration value is determined to be equal to or higher than a predetermined threshold value, the notifying means 30 notifies that the density and airtightness have exceeded the standard, and the number of people is equal to or greater than the standard number of people. When the determination is made, the notification means 30 notifies the individual areas 2 in which the number of people is determined to be equal to or greater than the reference number of people as the individual areas 2 in which the degree of density exceeds the reference.

According to the second aspect of the present invention, in the congestion countermeasure system according to the first aspect, a blower device 50 that blows air in the predetermined closed space 1 is further provided, and the centralized control server 80 receives the determination result of the CO ₂ concentration determination unit 81a. and the judgment result of the number judging section 22b, the blowing by the blower 50 is controlled.

The present invention according to claim 3 is the crowd control system according to claim 1 or claim 2, wherein the notification means 30 is a warning lamp 30a or a warning display monitor 30b on which a warning display is displayed. do.

The present invention according to claim 4 is the crowd control system according to any one of claims 1 to 3, wherein the reference number of people is a first reference number of people and a second reference number of people larger than the first reference number of people is set, and the centralized control server 80 notifies individual areas 2 in which the number of people is determined to be equal to or more than the first standard number of people and less than the second standard number of people by the number determination unit 22b as individual areas 2 in which the density exceeds the standard. The reporting means 30 notifies the individual areas 2 in which the number of people is determined to be equal to or greater than the second reference number of people by the number determining unit 22b as the individual areas 2 in which the density and the degree of closeness exceed the standards. characterized by

The present invention according to claim 5 is the crowd control system according to claim 4, wherein the individual area 2 is set to 3 m to 4 m square in floor view, the first reference number of people is set to 4 to 5 people, It is characterized in that the second reference number of people is set to 6 to 7 people.

The present invention according to claim 6 is the congestion countermeasure system according to any one of claims 1 to 5, wherein a first threshold and a second threshold higher than the first threshold are set as thresholds, When the CO ₂ concentration determination unit 81a determines that the CO ₂ concentration is equal to or higher than the second threshold value, the centralized control server 80 notifies from the notification means 30 that the density and sealing degree of the predetermined closed space 1 exceed the standard. characterized by

The present invention according to claim 7 is the crowd control system according to claim 2, wherein the central control server 80 determines that the number of people in one or more individual areas 2 is equal to or greater than the reference number of people by the number of people determination unit 22b. In this case, the ventilator 40 is set to the strong operation mode and the blower 50 is operated.

The present invention according to claim 8 is the crowd control system according to claim 6 citing claim 2. In the crowd control system according to claim 6, the centralized management server 80 controls the individual areas where the number of people is determined to be equal to or greater than the reference number by the number of people determination unit 22b. ₂ in the absence of _CO When the CO ₂ concentration determination unit 81a determines that the CO ₂ concentration is greater than or equal to the first threshold value and less than the second threshold value, the ventilator 40 is set to the high operation mode, the blower device 50 is not operated, and the CO ₂ concentration is determined. When the unit 81a determines that the CO ₂ concentration is equal to or higher than the second threshold value, the ventilator 40 is set to the high operation mode and the air blower 50 is operated.

The present invention according to claim 9 is the crowd control system according to any one of claims 1 to 8, further comprising an air conditioner 60 for adjusting the temperature of the predetermined closed space 1, and the centralized control server 80 , the temperature adjustment by the air conditioner 60 is controlled based on the combination of the determination result of the CO ₂ concentration determination unit 81a and the determination result of the number determination unit 22b.

According to the tenth aspect of the present invention, in the crowd control system according to the ninth aspect, the centralized management server 80 determines that the number of individual areas 2 whose number of persons is equal to or larger than the reference number is the reference number. further includes an individual area number determination unit 81b that determines whether or not the number of air conditioners 60 exceeds the reference number. It is characterized by lowering the set temperature.

The present invention according to claim 11 is the crowd control system according to claim 9 citing claim 6. In the crowd control system according to claim 9, the centralized control server 80 controls the individual area where the number of people is determined to be equal to or greater than the reference number by the number of people determination unit 22b. 2, if the CO ₂ concentration determination unit 81a determines that the CO ₂ concentration is less than the first threshold value, the ventilator 40 is set to the weak operation mode, and the set temperature of the air conditioner 60 is changed. First, when the CO ₂ concentration determination unit 81a determines that the CO ₂ concentration is equal to or greater than the first threshold value and less than the second threshold value, the ventilator 40 is set to the high operation mode and the set temperature of the air conditioner 60 is changed. First, when the CO ₂ concentration determination unit 81a determines that the CO ₂ concentration is equal to or higher than the second threshold value, the ventilator 40 is set to the high operation mode and the set temperature of the air conditioner 60 is lowered. .

The present invention recited in claim 12 is the congestion countermeasure system recited in claim 10, which further quotes claim 9 quoting claim 6. When it is determined that the number of individual regions 2 is one or more and equal to or less than the reference number, if the CO ₂ concentration determining unit 81a determines that the CO ₂ concentration is less than the second threshold value, the ventilator 40 is strongly turned on. When the CO ₂ concentration determination unit 81a determines that the CO ₂ concentration is equal to or higher than the second threshold without changing the set temperature of the air conditioner 60 while switching to the operation mode, the ventilation device 40 is set to the high operation mode. At the same time, the set temperature of the air conditioner 60 is lowered.

The present invention according to claim 13 is the crowd control system according to any one of claims 1 to 12, further comprising a lighting device 70 for dimming the predetermined closed space, wherein the central control server 80 It is characterized by controlling the dimming by the lighting device 70 based on the combination of the determination result of the CO ₂ concentration determination section 81a and the determination result of the number determination section 22b.

According to a fourteenth aspect of the present invention, in the crowd control system according to the thirteenth aspect, the centralized control server 80 determines that the number of individual areas 2 for which the number of people is determined to be equal to or greater than the reference number by the number-of-persons determination unit 22b is the reference number further includes an individual area number determination unit 81b that determines whether or not the number of lighting devices 70 exceeds the reference number. It is characterized by increasing the set brightness.

According to a fifteenth aspect of the present invention, in the crowd control system according to the fourteenth aspect, the centralized control server 80 increases the set brightness of the lighting equipment 70 so that the number of individual areas 2 for which the number of people exceeds the reference number exceeds the reference number. As a warning, the set luminance is repeatedly raised and lowered for a predetermined period of time.

The present invention according to claim 16 is the crowd control system according to claim 13 quoting claim 6. In the crowd control system according to claim 13, the centralized control server 80 controls the individual areas where the number of people is determined to be equal to or greater than the reference number by the number of people determination unit 22b. 2, if the CO ₂ concentration determination unit 81a determines that the CO ₂ concentration is less than the first threshold value, the ventilator 40 is set to the weak operation mode, and the set luminance of the lighting device 70 is changed. However, when the CO ₂ concentration determination unit 81a determines that the CO ₂ concentration is equal to or greater than the first threshold value and less than the second threshold value, the ventilator 40 is set to the high operation mode, and the set luminance of the lighting device 70 is changed. First, when the CO ₂ concentration determination unit 81a determines that the CO ₂ concentration is equal to or higher than the second threshold value, the ventilator 40 is set to the high operation mode and the set luminance of the lighting device 70 is increased. .

The present invention according to claim 17 is the congestion countermeasure system according to claim 14 quoting claim 6. The centralized management server 80 determines that the number of individual areas 2 with a reference number of people or more is equal to the number of individual areas 2 by the individual area number determination unit When it is determined that the CO ₂ concentration determination unit 81a determines that the CO ₂ concentration is less than the second threshold when it is determined that the number is equal to or greater than the reference number, the ventilator 40 is set to the high operation mode, and the lighting If the CO ₂ concentration determination unit 81a determines that the CO ₂ concentration is equal to or higher than the second threshold without changing the set luminance of the device 70, the ventilation device 40 is set to the high operation mode, and the lighting device 70 is set It is characterized by increasing the brightness.

According to the present invention, it is possible to detect not only a predetermined closed space but also the density of people in an individual area within the closed space to perform notification and environment control.

FIG. 1 is a block diagram showing a congestion countermeasure system according to an embodiment of the present invention in terms of function implementation means; Diagram showing individual regions in the same predetermined closed space Flowchart showing a method of classifying a predetermined closed space state based on CO ₂ concentration by the crowd control system Diagram showing doujinshi sensors and individual areas A diagram showing an example of setting the same individual area and the standard number of people Flowchart showing how to calculate the number of people by the crowd control system Flowchart showing how to calculate the number of people by the crowd control system Flowchart showing how to calculate the number of people by the crowd control system Conceptual diagram of how to calculate the number of people by the same crowd control system A diagram showing an example of the calculation result of the number of people by the crowd control system A diagram showing an example of classification results for the same cell Flowchart showing a method of classifying individual areas by the same crowd control system Diagram explaining another classification method of individual areas by the same crowd control system Diagram showing an example of dividing the same individual area into areas based on the number of people Flowchart showing a method of classifying a predetermined closed space state based on the number of areas by the crowd control system A diagram showing an example of the notification means of the same crowd control system Image of the warning display monitor

A congestion countermeasure system according to the first embodiment of the present invention includes a CO ₂ sensor that detects the CO ₂ concentration in a predetermined closed space, and a person that detects the presence of people in a plurality of individual areas formed by dividing the predetermined closed space. A sensor, a ventilation device that has a weak operation mode and a strong operation mode and performs ventilation in a predetermined closed space, a reporting means that reports on the density of people, and a density determination means that determines the density in an individual area. , a centralized management server for controlling notification by the notification means and ventilation by the ventilation equipment, the density determination means, a people calculation unit for calculating the number of people in each individual area based on the detection result of the human sensor, and a people calculation unit and _a number of people determination unit that determines whether or not the number of people calculated is equal to _or greater than a reference number when the calculated number of people is not zero, and the centralized control server determines whether the CO ₂ concentration determination unit, controls ventilation by ventilation equipment based on the combination of the determination result of the CO ₂ concentration determination unit and the determination result of the number of people determination unit, and determines that the CO ₂ concentration value is equal to or greater than a predetermined threshold value. If the number of people exceeds the standard number of people, the individual area where the number of people is determined to be the standard number of people or more is notified from the notifying means as an individual area exceeding .
According to the present embodiment, not only the density of the entire closed space derived from the detection result of the CO ₂ sensor (macro detection), but also the partial density of the closed space derived from the detection result of the human sensor ( Based on micro detection), the notification by the notification means and the control of the ventilation equipment are performed, so it is possible to suppress the occurrence of the three Cs in a predetermined closed space and prevent the spread of infectious diseases.

According to a second embodiment of the present invention, the congestion countermeasure system according to the first embodiment further includes a blower that blows air in a predetermined closed space, and the centralized control server receives the determination result of the CO ₂ concentration determination unit and Based on the combination with the judgment result of the number-of-people judging section, the air blowing by the blower is controlled.
According to the present embodiment, based on not only the density of the entire predetermined closed space derived from the detection result of the CO ₂ sensor, but also the partial density in the predetermined closed space derived from the detection result of the human sensor. , the notification by the notification means and the control of the ventilator and the air blower are performed, so that the occurrence of the three Cs in a predetermined closed space can be further suppressed and the spread of infectious diseases can be prevented.

According to a third embodiment of the present invention, in the congestion countermeasure system according to the first or second embodiment, the notification means is a warning lamp or a warning display monitor that displays a warning display.
According to the present embodiment, when the density exceeds the standard, a warning can be quickly and reliably issued by visualizing the notification to the person in the predetermined closed space or to the observer who is outside the predetermined closed space. It can be carried out.

A fourth embodiment of the present invention is the crowd control system according to any one of the first to third embodiments, wherein the reference number of people is a first reference number of people and a second reference number that is larger than the first reference number of people The number of people is set, and the centralized control server notifies, from the notifying means, the individual areas in which the number of people is determined to be equal to or more than the first standard number of people and less than the second standard number of people by the number of people determining unit as individual areas whose density exceeds the standard. Then, an individual area in which the number of people is determined to be equal to or greater than the second reference number of people by the number determination unit is notified by the notification means as an individual area in which the density and the degree of closeness exceed the standard.
According to the present embodiment, when the density of individual areas exceeds the standard, by notifying with different content depending on the degree of excess, appropriate movement from the individual area can be urged.

According to the fifth embodiment of the present invention, in the crowd control system according to the fourth embodiment, the individual area is set to 3 m to 4 m square in floor view, and the first reference number of people is set to 4 to 5 people. and the second standard number of people is set to 6 to 7 people.
According to the present embodiment, it is possible to locally (microscopically) detect that individual regions are in a dense state or in a dense/close-contact state.

According to a sixth embodiment of the present invention, in the congestion countermeasure system according to any one of the first to fifth embodiments, a first threshold and a second threshold higher than the first threshold are set as thresholds. When the CO ₂ concentration determining unit determines that the CO ₂ concentration is equal to or higher than the second threshold value, the centralized control server notifies from the notification means that the density and sealing degree of the predetermined closed space have exceeded the standard. be.
According to the present embodiment, the timing of notification regarding the degree of density and the degree of airtightness of a predetermined closed space (macroscopically) based on the CO ₂ concentration can be made appropriate according to the increase or decrease in the number of people in the room.

According to a seventh embodiment of the present invention, in the congestion countermeasure system according to the second embodiment, the centralized control server has a number of people determined by the number of people determination unit that the number of people in one or more individual areas is equal to or greater than the reference number of people. In this case, the ventilator is switched to the strong operation mode and the blower is operated.
According to the present embodiment, if even one individual region exceeding the standard occurs, ventilation is maximized even if the CO ₂ concentration is less than the threshold, resulting in a dense state or a dense/close-contact state It is possible to reduce the risk of airborne infection by sufficiently ventilating the specified closed space where the infection is occurring.

According to the eighth embodiment of the present invention, in the crowd control system according to the sixth embodiment, which is a reference to the second embodiment, the centralized control server determines that the number of people is equal to or greater than the reference number of people by the number of people determination unit. In the case where there is no individual region, if the CO ₂ concentration determination unit determines that the CO ₂ concentration is less than the first threshold value, the ventilation device is set to the weak operation mode, the blower device is not operated, and the CO ₂ If the CO 2 concentration determination unit determines that the CO ₂ concentration is greater than or equal to the first threshold value and less than the second threshold value, the ventilation device is set to the high operation mode, the blower device is not operated, and the CO ₂ concentration determination unit determines that the CO ₂ concentration is equal to or higher than the second threshold value, the ventilator is switched to the high operation mode and the blower is operated.
According to the present embodiment, by controlling the operation of the ventilation device and the blower device based on the state of the entire predetermined closed space (macroscopic state) and the state of each individual area (microscopic state), It can effectively improve the environment.

According to a ninth embodiment of the present invention, in the crowd control system according to any one of the first to eighth embodiments, an air conditioner for adjusting the temperature of a predetermined closed space is further provided, and the centralized management server includes a CO The temperature adjustment by the air conditioner is controlled based on the combination of the judgment result of _{the two-} concentration judging section and the judgment result of the number-of-people judging section.
According to the present embodiment, based on not only the density of the entire predetermined closed space derived from the detection result of the CO ₂ sensor, but also the partial density in the predetermined closed space derived from the detection result of the human sensor. Since the notification by the notification means and the control of the ventilation equipment and the air conditioning equipment are performed, it is possible to further suppress the occurrence of the three Cs in the predetermined closed space and prevent the spread of infectious diseases.

According to a tenth embodiment of the present invention, in the congestion countermeasure system according to the ninth embodiment, the centralized management server determines that the number of individual areas in which the number of people is determined to be equal to or greater than the reference number by the number of people determining unit is the reference number. further includes an individual area number determination unit that determines whether or not the number of individual areas exceeds the reference number, and when the individual area number determination unit determines that the number of individual areas with a number of people equal to or greater than the reference number exceeds the reference number, the set temperature of the air conditioner is lowered. It is.
According to this embodiment, in addition to notification by the notification means, it is possible to notify the occurrence of a large number of individual areas with a high density by a decrease in temperature. In addition, it is possible to prevent work efficiency from being lowered due to drowsiness.

According to the eleventh embodiment of the present invention, in the congestion countermeasure system according to the ninth embodiment to which the sixth embodiment is cited, the centralized control server determines that the number of people is equal to or greater than the reference number of people by the number of people determination unit. When the CO ₂ concentration determination unit determines that the CO ₂ concentration is less than the first threshold value when there is no individual region that has been identified, the ventilator is set to the weak operation mode and the set temperature of the air conditioner is changed. However, if the CO ₂ concentration determination unit determines that the CO ₂ concentration is greater than or equal to the first threshold value and less than the second threshold value, the ventilator is set to the high operation mode, the set temperature of the air conditioner is not changed, and the CO When _{the 2-} concentration determination unit determines that the CO ₂ concentration is equal to or higher than the second threshold value, the ventilator is set to the high operation mode and the set temperature of the air conditioner is lowered.
According to the present embodiment, the environment of the predetermined closed space can be effectively improved by controlling the operation of the ventilator and the air conditioner based on the state of the entire predetermined closed space and the state of each individual area. .

According to a twelfth embodiment of the present invention, in the congestion countermeasure system according to the tenth embodiment to which the sixth embodiment is cited, the centralized management server determines, by the individual area number determination unit, the When the number is determined to be one or more and equal to or less than the reference number, if the CO ₂ concentration determination unit determines that the CO ₂ concentration is less than the second threshold, the ventilation equipment is set to the high operation mode, If the CO ₂ concentration determination unit determines that the CO ₂ concentration is equal to or higher than the second threshold without changing the set temperature of the air conditioner, the ventilator is set to the high operation mode and the set temperature of the air conditioner is lowered. It is.
According to the present embodiment, even if the number of individual areas with a high degree of density is equal to or less than the reference number, the increase in the degree of density and the degree of airtightness in the entire predetermined closed space is notified by the notifying means, and in addition to the notification by the notification means. be able to.

A thirteenth embodiment of the present invention is the crowd control system according to any one of the first to twelfth embodiments, further comprising a lighting device that performs dimming in a predetermined closed space, wherein the centralized management server comprises a CO Based on the combination of the determination result of the _2- density determination unit and the determination result of the number of people determination unit, the light adjustment by the lighting equipment is controlled.
According to the present embodiment, based on not only the density of the entire predetermined closed space derived from the detection result of the CO ₂ sensor, but also the partial density in the predetermined closed space derived from the detection result of the human sensor. , since the notification by the notification means and the control of the ventilation equipment and the lighting equipment are performed, it is possible to further suppress the occurrence of the three Cs in the predetermined closed space and prevent the spread of infectious diseases.

According to a fourteenth embodiment of the present invention, in the congestion countermeasure system according to the thirteenth embodiment, the centralized management server determines that the number of individual areas in which the number of people is determined to be equal to or greater than the reference number by the number-of-people determination unit is the reference number. further includes an individual area number determination unit that determines whether or not the number of individual areas exceeds the reference number, and if the individual area number determination unit determines that the number of individual areas for which the number of people is equal to or greater than the reference number exceeds the reference number, the set luminance of the lighting device is increased. It is.
According to this embodiment, in addition to notification by the notification means, it is possible to visually stimulate the occurrence of a large number of individual areas with a high density and also to notify the user of the change in luminance. In addition, it is possible to prevent work efficiency from being lowered due to drowsiness.

According to a fifteenth embodiment of the present invention, in the congestion countermeasure system according to the fourteenth embodiment, the centralized control server increases the set brightness of the lighting equipment, and the number of individual areas where the number of people exceeds the reference number exceeds the reference number. As a warning, the set luminance is repeatedly raised and lowered for a predetermined period of time.
According to this embodiment, since the visual stimulus is increased, it is possible to clearly notify that a large number of individual areas in a dense state or a dense/close-contact state are generated.

According to a sixteenth embodiment of the present invention, in the crowd control system according to the thirteenth embodiment to which the sixth embodiment is cited, the centralized control server determines that the number of people is equal to or greater than the reference number of people by the number of people determination unit. When the CO ₂ concentration determination unit determines that the CO ₂ concentration is less than the first threshold value when there is no individual area that has been identified, the ventilator is set to the weak operation mode, and the set luminance of the lighting device is changed. However, if the CO ₂ concentration determination unit determines that the CO ₂ concentration is greater than or equal to the first threshold value and less than the second threshold value, the ventilator is set to the high operation mode, the brightness setting of the lighting device is not changed, and the CO When the _2- concentration determination unit determines that the CO ₂ concentration is equal to or higher than the second threshold value, the ventilator is set to the high operation mode and the set brightness of the lighting equipment is increased.
According to the present embodiment, the environment of the predetermined closed space can be effectively improved by controlling the operation of the ventilation equipment and the lighting equipment based on the state of the entire predetermined closed space and the state of the individual areas. .

According to a seventeenth embodiment of the present invention, in the congestion countermeasure system according to the fourteenth embodiment to which the sixth embodiment is cited, the centralized management server determines, by the individual area number determination unit, the number of individual areas equal to or larger than the reference number When the number is determined to be one or more and equal to or less than the reference number, if the CO ₂ concentration determination unit determines that the CO ₂ concentration is less than the second threshold, the ventilation equipment is set to the high operation mode, If the CO ₂ concentration determination unit determines that the CO ₂ concentration is equal to or higher than the second threshold without changing the brightness setting of the lighting device, the ventilation device is set to the high operation mode and the brightness setting of the lighting device is increased. It is.
According to the present embodiment, even if the number of individual regions with a high density is equal to or less than the reference number, the fact that the density and the degree of sealing in the entire predetermined closed space are increasing is visually stimulated in addition to the notification by the notification means. can be given to let you know.

A congestion countermeasure system according to an embodiment of the present invention will be described below.
FIG. 1 is a block diagram showing the congestion countermeasure system according to the present embodiment in terms of function implementation means.
The crowd control system according to this embodiment includes a CO ₂ sensor 11 that detects the CO ₂ concentration in a predetermined closed space, a human sensor 21 that detects the presence of people in a plurality of separate areas formed by dividing the predetermined closed space, Density determination means 22 for determining the density in an individual area, notification means 30 for notifying the density of people, ventilation equipment 40 for ventilating a predetermined closed space, and an air blower for blowing air in a predetermined closed space a device 50, an air conditioner 60 that adjusts the temperature in a predetermined closed space, a lighting device 70 that adjusts the light in the predetermined closed space, a centralized control server 80, and server-side wireless communication data from the centralized control server 80. It has an infrared remote control node 90 that converts it into infrared communication data.
A predetermined closed space is a space in which air hardly enters or exits, such as a room in which all doors and windows are closed.
The CO ₂ sensor 11 is arranged in the CO ₂ sensor unit 10 together with the communication unit 12 , and the human sensor 21 and the density determining means 22 are arranged in the human sensor unit 20 together with the communication unit 23 .
The centralized control server 80 receives data from the _CO2 sensor 11, the human sensor 21, and the density determination means 22, and controls means 81 for outputting control data to target equipment in a predetermined closed space, and communication units 12 and 23. , a storage means 83, a schedule setting means 84, and a warning display command means 85.
The infrared remote control node 90 includes wireless communication means 91 for communicating with the wireless communication means 82, wireless/infrared conversion means 92 for converting server-side wireless communication data transmitted from the wireless communication means 82 into infrared communication data, and wireless・An infrared communication unit 93 for transmitting infrared communication data converted by the infrared conversion means 92 is provided.

The centralized control server 80 controls the notification means 30, the ventilation device 40, the blower device 50, the air conditioner 60, and the lighting device .
The ventilation device 40 includes a ventilation controller 41 that instructs the ventilation device 40 to stop, weak operation mode, weak operation mode, or strong operation mode. The ventilation device 40 is a duct type ventilation fan having a ventilation function within a predetermined closed space. It may be one that forcibly supplies air into a predetermined closed space, and one that is provided with a total heat exchanger and has an intake/exhaust function is preferable.
The blower device 50 includes a blower controller 51 that instructs the blower device 50 to stop or operate. The blower 50 is an electric fan having an air stirring function in a predetermined closed space or a ventilation fan for exhausting air in the predetermined closed space.
The air conditioning equipment 60 includes an air conditioning controller 61 that instructs the air conditioning equipment 60 to set a temperature to be set for stopping and operating. The set temperature of the air conditioner 60 fluctuates depending on the time period and the like according to a schedule predetermined by the schedule setting means 84 .
The lighting device 70 includes a lighting controller 71 that instructs the lighting device 70 to turn OFF and ON, and to change the set luminance when ON. Note that the set brightness of the lighting device 70 varies depending on the time period and the like according to a schedule predetermined by the schedule setting means 84 .
The lighting controller 71 receives the infrared communication data, converts it into wireless communication data, and transmits the instruction data to the lighting device 70 . In general, this type of lighting controller 71 receives infrared communication data from an infrared remote controller and transmits instruction data to the lighting equipment 70 using wireless communication data according to the communication standard adopted by the manufacturer.

The storage means 83 stores data such as the threshold value of the CO ₂ concentration in the predetermined closed space, the reference number of people in the individual area, and the control algorithm for each device.
Communication is performed between the central control server 80 and each device via the wireless communication means 82 , the communication units 12 and 23 or the infrared communication unit 93 . The control data for the lighting equipment 70 transmitted from the central control server 80 to the infrared remote control node 90 is server-side wireless communication data, and the infrared remote control node 90 converts the received control data into infrared communication data. It is transmitted to the lighting controller 71 . Here, the server-side wireless communication data has a different standard from the wireless communication data transmitted from the lighting controller 71 to the lighting device 70 .

In this embodiment, a first threshold and a second threshold higher than the first threshold are set as the thresholds for the CO ₂ concentration. Also, as the standard number of people, a first standard number of people and a second standard number of people larger than the first standard number of people are set.
Here, the individual areas are areas obtained by virtually dividing the predetermined closed space. For example, as shown in FIG. It is divided into regions to form 12 individual regions 2 .

The density determination unit 22 includes a people calculation unit 22a that calculates the number of people in the individual area 2 based on the detection result of the human sensor 21, and whether or not the number of people calculated by the people calculation unit 22a is equal to or greater than the reference number of people, that is, the individual area 2 has a number-of-people determination unit 22b that determines the degree of density in the area.
The density determination unit 22 transmits the determination result of the number determination unit 22 b to the control unit 81 and the warning display command unit 85 .
The control means 81 includes a CO ₂ concentration determination section 81a that determines whether or not the CO ₂ concentration detected by the CO ₂ sensor 11 is equal to or greater than a threshold value, and an individual area determined by the number of people determination section 22b that the number of people is equal to or greater than the reference number of people. 2 exceeds the reference number, and outputs a control command to the ventilation device 40, the blower device 50, the air conditioner 60, the lighting device 70, and the warning lamp 30a. It has a control command section 81c.
Based on the combination of the determination result of the CO ₂ concentration determination unit 81a and the determination result of the number of people determination unit 22b, the control unit 81 controls the ventilation by the ventilation device 40, the blowing by the blower device 50, and the air conditioning device 60 via the control command unit 81c. temperature adjustment by and dimming by the lighting equipment 70 are controlled.
Further, when the CO ₂ concentration value is determined to be equal to or higher than the second threshold value, the control means 81 determines that the degree of density and the degree of sealing of the predetermined closed space 1 exceeds the standard, and outputs the warning lamp 30a via the control command section 81c. If the number of people is determined to be equal to or greater than the reference number of people, the individual area 2 determined to have the number of people equal to or greater than the reference number of people is warned through the control command unit 81c as the individual area 2 whose density exceeds the standard. Notification is made from the lamp 30a.
In addition, when the CO ₂ concentration value is determined to be equal to or higher than the second threshold, the warning display command means 85 instructs the warning display server 32 to notify that the density and the degree of sealing of the predetermined closed space 1 have exceeded the standard. When the number of people is determined to be equal to or greater than the reference number of people, the warning display server 32 notifies the individual area 2 in which the number of people is determined to be equal to or greater than the reference number of people as the individual area 2 whose density exceeds the standard. to. The warning display server 32 that has received the instruction generates warning content and outputs it to the warning display monitor 30b.
In this way, not only the density of the entire closed space derived from the detection result of the CO ₂ sensor 11, that is, the macro density, but also the partial density of the closed space derived from the detection result of the human sensor 21, That is, based on the microscopic density, the warning lamp 30a and the warning display monitor 30b are notified, and the ventilation device 40, the blower device 50, the air conditioner 60, and the lighting device 70 are controlled. The spread of infectious diseases can be prevented by effectively suppressing the occurrence of the three Cs in public spaces.
Also, a first threshold value and a second threshold value are set as threshold values, and when it is determined that the CO ₂ concentration is equal to or higher than the second threshold value, it is notified that the density and sealing degree of the predetermined closed space 1 have exceeded the standard. By doing so, the timing of notification regarding the degree of density and the degree of airtightness of the predetermined closed space 1 based on the CO ₂ concentration can be made appropriate according to the increase or decrease in the number of people in the room.

FIG. 3 is a flow chart showing a method of classifying predetermined closed space states based on the CO ₂ concentration by the crowd control system of this embodiment.
The central control server 80 acquires CO ₂ concentration data from the CO ₂ sensor 11 (step S1).
The CO ₂ concentration determination unit 81a determines whether or not the acquired CO ₂ concentration is less than the first threshold (step S2).
When it is determined that the CO ₂ concentration is less than the first threshold value ("YES" in step S2), the control means 81 changes the state of the predetermined closed space 1 based on the CO ₂ concentration to the first CO ₂ concentration state. Classify.
Further, when the CO ₂ concentration determining unit 81a determines that the CO ₂ concentration is not less than the first threshold ("NO" in step S2), it determines whether the acquired CO ₂ concentration is less than the second threshold (step S3).
When it is determined that the CO ₂ concentration is less than the second threshold value ("YES" in step S3), the control means 81 classifies the state of the predetermined closed space 1 based on the CO ₂ concentration into the second CO ₂ concentration state. However, if it is determined that the CO ₂ concentration is not less than the second threshold value ("NO" in step S3), the state of the predetermined closed space 1 based on the CO ₂ concentration is classified into the third CO ₂ concentration state.
In this way, the control means 81 sets the state of the predetermined closed space 1 to a first CO 2 concentration state in which the CO ₂ concentration is less than the first threshold, and a second CO ₂ concentration state in which the CO ₂ concentration is greater than or equal to the first threshold and less than the second threshold. and a third _CO2 concentration state _in which the _CO2 concentration is greater than or equal to the second threshold.

Note that the first threshold and the second threshold are set based on the allowable number of people in the predetermined closed space 1 . The maximum number of people that can be accommodated in a given closed space 1 is based on the Act on Ensuring Sanitary Environments in Buildings (Building Management Act), etc. It is calculated from the number of times and the volume of the predetermined closed space 1, etc., the required ventilation volume is obtained based on the calculated capacity capacity and the required exhaust volume per person, and the appropriate ventilation equipment 40 corresponding to the ventilation volume is specified. Calculation is made assuming that the device is installed in the closed space 1. If the CO ₂ concentration in the predetermined closed space 1 exceeds the second threshold of 1,000 ppm, there are people exceeding the allowable number of people, or there is insufficient ventilation by the installed ventilation equipment 40. - Since it is thought that it is a closed state, in this Example, a 1st threshold value is set to 800 ppm and a 2nd threshold value is set to 1,000 ppm.

4A and 4B are diagrams showing human sensors and individual areas in this embodiment. FIG. 4A shows the installation locations and individual areas of the human sensors, and FIG. It shows a state in which the sensor is viewed from directly below. FIG. 5 is a diagram showing a setting example of the individual areas and the reference number of people in this embodiment.
In this embodiment, as shown in FIG. 4(a), the human sensor 21 is arranged at a height of 2.5 m to 3.1 m from the floor in the center of the individual area 2, and as shown in FIG. 5(a). It is assumed that the size of the individual area 2 that can be measured is 4 m square (4 m x 4 m). The human sensor 21 has four thermopile array sensors P, Q, R, and S (one: 4×4 elements) arranged at equal intervals in the circumferential direction as shown in FIG. 4(b). The four thermopile array sensors P, Q, R, and S mounted at an angle detect each of the four parts obtained by dividing the individual area 2 by crossing the floor surface with the center point as a reference. For example, when the motion sensor 21 is installed so as to match the direction of the "A direction mark" shown in FIGS. The lower left portion of the divided individual area 2 is detected. As a result, the individual region 2 can be measured with a temperature distribution composed of continuous 8×8 elements.
FIG. 5(b) shows an example of how a heat source regarded as a person is measured by a thermopile array sensor. The density determining means 22 classifies each square (cell) into either a cell in which a heat source regarded as a person exists or a cell in which a heat source regarded as a person does not exist. In FIGS. 5(b) to (d), gray cells are cells with a heat source, white cells are cells without a heat source, and white circles indicate estimated positions of people. The density determining means 22 determines that two or more consecutive gray cells are human heat sources, and that one independent gray cell is a non-human heat source such as a personal computer or a printer.
The first reference number of people and the second reference number of people are set based on the size of the individual area 2 . The first standard number of people is the number of people that can be accommodated in the individual area 2 without being crowded. The second standard number of people is the number of people that can be accommodated in the individual area 2 without being crowded or in close contact.
For example, in the COVID-19 countermeasures, it is recommended to keep a distance of 2m or more between people (so-called social distance) in order to avoid crowding and close contact. If there are 4 or more people in 2, it is difficult to keep a distance of 2 m or more between them. Therefore, in this embodiment, the first reference number of persons is set to four. Also, as shown in FIG. 5(d), when six or more people are present in the individual area 2 of 4 m square, they tend to become close to each other. Therefore, in this embodiment, the second reference number of persons is six.
In this way, the first reference number of people and the second reference number of people depend on the size of the individual area 2, but when the size of the individual area 2 is set to 3m square to 4m square, the first reference number of people is 4 to 5 people. It is preferable to set the second reference number of people to 6 to 7 people. As a result, it is possible to locally (microscopically) detect that the individual regions 2 are in a dense state or a dense/close-contact state.

6 to 8 are flowcharts showing the method of calculating the number of people by the congestion countermeasure system of this embodiment, FIG. 9 is a conceptual diagram of the method of calculating the number of people by the crowd countermeasure system of this embodiment, and FIG. 10 is the crowd countermeasure of this embodiment. It is a figure which shows the calculation result example of the number of people by a system.
As described above, based on the temperature detected by the thermopile array sensor, the density determination means 22 determines each cell (8×8=64 cells in this embodiment) in the individual area 2 as a cell having a heat source that is regarded as a person. or cells in which there is no heat source that is regarded as a person, and performs the first number calculation, the second number calculation, and the third number calculation, and the number of people existing in the individual area 2 is calculated. calculate.
The following describes the first number calculation, the second number calculation, and the third number calculation, using the cell classification result shown in FIG. 11 as an example. In FIG. 11, cells in which heat sources considered to be humans exist are gray, and cells in which heat sources considered to be humans do not exist are white.

FIG. 6 is a flow chart showing the first number-of-people calculation.
The number-of-persons calculation unit 22a uses a square determination frame 100 surrounding four continuous cells in four directions as shown in FIG. (step S21).
Next, the number calculation unit 22a determines whether or not the number of cells calculated in step S21 is four (step S22).
When the number of persons calculating unit 22a determines that the calculated number of cells is four ("YES" in step S22), the number of persons calculated is incremented by 1 (step S23). Then, the four cells that are determined to be human heat sources are marked as having undergone determination processing (step S24).
After step S24, or when determining that the calculated number of cells is not four ("NO" in step S22), the number-of-persons calculating unit 22a determines that all the cells in the individual region 2 are determined by the determination frame 100. It is determined whether or not it is completed (step S25).
When the number calculation unit 22a determines that the determination by the determination frame 100 has not been completed for all the cells in the individual area 2 ("NO" in step S25), the determination frame is set as shown in FIG. By moving 100 by one column or one row, one or more cells among the four cells to be determined are replaced (step S26), and the process returns to step S21. In step S21 from the second time onwards, the number of cells to be calculated does not include the marked cells that have already undergone determination processing in step S24.
On the other hand, when the number calculation unit 22a determines that the determination by the determination frame 100 has been completed for all cells in the individual area 2 ("YES" in step S25), the first number calculation is completed and the second number calculation is completed. Move to the number of people calculation.
In the example shown in FIG. 11, as a result of the first calculation of the number of persons, the number of persons in the individual area 2 is calculated as "1" (see FIG. 10(a)).

FIG. 7 is a flow chart showing the second number-of-people calculation.
The number-of-people calculation unit 22a uses the determination frame 100 in the same manner as in the first number-of-people calculation, and calculates the number of cells regarded as heat sources for people within the determination frame 100 (step S31). At this time, the number of cells to be calculated does not include the marked cells that have undergone determination processing in the first calculation of the number of persons.
Next, the people calculation unit 22a determines whether or not the number of cells calculated in step S31 is two or more (step S32).
When the number of persons calculation unit 22a determines that the calculated number of cells is two or more ("YES" in step S32), the number of persons in the individual area 2 is incremented by one (step S33). Then, two or more cells that are determined to be human heat sources are marked as having undergone determination processing (step S34).
After step S34, or when it is determined that the calculated number of cells is not two or more ("NO" in step S32), the number-of-persons calculation unit 22a performs determination by the determination frame 100 for all cells in the individual region 2. is completed (step S35).
When the number calculation unit 22a determines that the determination by the determination frame 100 has not been completed for all the cells in the individual region 2 ("NO" in step S35), the determination frame By moving 100 by one column or one row, one or more cells among the four cells to be determined are replaced (step S36), and the process returns to step S31. In step S31 from the second time onwards, in addition to the cells that have undergone determination processing and have been marked in the first calculation of the number of people, the cells that have already undergone determination processing and have been marked in step S34 are not included in the calculated number.
On the other hand, when the people calculation unit 22a determines that the determination by the determination frame 100 has been completed for all the cells in the individual area 2 ("YES" in step S35), the second people calculation is finished and the third Move to the number of people calculation.
In the example shown in FIG. 11, as a result of the second calculation of the number of persons, the number of persons in the individual area 2 is calculated as "4" (see FIG. 10(b)).

FIG. 8 is a flow chart showing the third number-of-people calculation.
The number-of-persons calculation unit 22a uses a rectangular determination frame 101 surrounding three horizontally continuous cells as shown in FIG. Calculate (step S41). At this time, the number of cells marked for judgment processing is not included in the number of calculations in the first calculation of the number of persons and the second calculation of the number of persons.
Next, the people calculation unit 22a determines whether or not the number of cells calculated in step S41 is three (step S42).
When the number of persons calculation unit 22a determines that the calculated number of cells is 3 ("YES" in step S42), the number of persons calculated in the individual area 2 is incremented by 1 (step S43). Then, the three cells determined to be human heat sources are marked as having undergone determination processing (step S44).
After step S44, or when determining that the calculated number of cells is not three ("NO" in step S42), the number-of-persons calculating unit 22a determines that all the cells in the individual region 2 are determined by the determination frame 101. It is determined whether or not it is completed (step S45).
When the people calculation unit 22a determines that the determination by the determination frame 101 has not been completed for all the cells in the individual area 2 ("NO" in step S45), the determination frame By moving 101 by one column or one row, one or more cells among the three cells to be determined are replaced (step S46), and the process returns to step S41. In step S41 from the second time onward, in addition to the marked cells that have already undergone judgment processing in the first and second calculations of the number of people, cells that have already undergone judgment processing and have been marked in step S44 are calculated. not counted.
On the other hand, when the number calculation unit 22a determines that the determination by the determination frame 101 has been completed for all the cells in the individual area 2 ("YES" in step S45), the vertical direction as shown in FIG. Using a rectangular judgment frame 102 surrounding three consecutive cells, the number of cells judged to be human heat sources within the judgment frame 102 is calculated (step S47). At this time, the number of cells to be calculated does not include the marked cells that have undergone the determination process in the first calculation of the number of persons, the second calculation of the number of persons, and step S44.
Next, the number-of-persons calculation unit 22a determines whether or not the number of cells calculated in step S47 is three (step S48).
When the number of persons calculation unit 22a determines that the calculated number of cells is 3 ("YES" in step S48), the number of persons calculated in the individual area 2 is incremented by 1 (step S49). Then, the three cells determined to be human heat sources are marked as having undergone determination processing (step S50).
After step S50, or when determining that the calculated number of cells is not three ("NO" in step S48), the number-of-persons calculating unit 22a determines that all the cells in the individual region 2 are determined by the determination frame 102. It is determined whether or not it is completed (step S51).
When the people calculation unit 22a determines that the determination by the determination frame 102 has not been completed for all the cells in the individual area 2 ("NO" in step S51), the determination frame By moving 102 by one column or one row, one or more cells among the three cells to be determined are replaced (step S52), and the process returns to step S47. In step S47 from the second time onward, in addition to the cells that have undergone the first calculation of the number of persons, the second calculation of the number of persons, and the marking that has undergone the judgment processing in step S44, the marking that has already undergone the judgment processing has been conducted in step S50. Do not include cells in the calculation.
On the other hand, when the people calculation unit 22a determines that the determination by the determination frame 102 has been completed for all the cells in the individual area 2 ("YES" in step S51), the third people calculation ends.
In the case of the example shown in FIG. 11, the number of people in the individual area 2 is calculated as "0" as a result of the third number of people calculation.

In this manner, the number-of-persons calculation unit 22a calculates the number of persons by sequentially moving the determination frames 100, 101, and 102 set in the individual area 2. FIG.
The people calculation unit 22a calculates the number of people in the individual area 2 by adding the first people calculation result, the second people calculation result, and the third people calculation result. In the case of this embodiment, it is calculated as 1+4+0=5 people.

FIG. 12 is a flow chart showing a method of classifying individual areas by the congestion countermeasure system of this embodiment.
The density determination unit 22 acquires data for detecting the presence of people from the human sensor 21 (step S61).
The number calculation unit 22a calculates the number of persons for each individual area 2 as described above based on the acquired data (step S62).
The number determination unit 22b determines whether or not the number of people calculated by the number calculation unit 22a is zero for each individual area 2 (step S63).
The density determining means 22 classifies the individual areas 2 determined to have zero people ("YES" in step S63) as zero areas.
In addition, the number-of-people determination unit 22b determines whether or not the number of people calculated by the number-of-people calculation unit 22a is equal to or greater than the first reference number of people for individual areas 2 in which the number of people is determined not to be zero ("NO" in step S63). step S64).
The density determining means 22 classifies the individual area 2, in which the number of people is determined to be less than the first reference number of people ("NO" in step S64), as a normal area.
In addition, the number-of-persons determination unit 22b determines whether the number of people calculated by the number-of-people calculation unit 22a is equal to or more than the second reference number of individual areas 2 for which the number of people is determined to be equal to or greater than the first reference number of people ("YES" in step S64). (step S65).
The density determination means 22 classifies the individual area 2 in which it is determined that the number of people is not equal to or greater than the second reference number of people ("NO" in step S65) as a dense area, and the number of people is equal to or greater than the second reference number of people (in step S65 “YES”) is classified as a dense/close area.

13A and 13B are diagrams for explaining another method of classifying individual areas by the congestion countermeasure system of this embodiment, FIG. 13A is a diagram showing a small area, and FIGS. It is a figure which shows the heat-source detection condition in.
As described above, the density determination unit 22 acquires data for detecting the presence of people from the human sensor 21 and calculates the number of people for each individual area 2 based on the acquired data. However, if the heat sources are too close to each other, it may be assumed that the heat source is for one person even though there are actually two of them. Therefore, in addition to the classification based on the number of people in each individual area 2 described above, the density determination means 22 classifies the individual areas 2 based on the number of heat sources in a part of the individual areas 2 .
In this classification, a plurality of small areas 3 containing a predetermined number of cells are set for all the cells in the individual area 2, and among the total number of cells in the small areas 3, heat sources that are considered to be human exist. Based on the number of cells, it is determined whether or not it is a dense/close area.
For example, as shown in FIG. 13(a), it is assumed that one small area 3 consists of 16 cells in an individual area 2 having 64 cells. Further, adjacent small areas 3 overlap half of the number of cells (8 cells). As a result, small areas 3A to 3I are set in the individual area 2 as the small area 3. FIG.
In FIGS. 13B and 13C, gray cells indicate cells with a heat source, and white cells indicate cells without a heat source. As shown in FIG. 13(b), if there are two or more small areas 3 determined to have a heat source considered to be a person in more than half of the cells, or as shown in FIG. 13(c), 3/ If there is one or more small areas 3 in which 4 (12 cells) or more cells have a heat source regarded as a person, the individual area 2 is classified as a dense/close area. This makes it possible to more appropriately determine the situation in the individual area 2 even when the heat sources that are too close to each other cannot be separated from a plurality of persons.

FIG. 14 is a diagram showing an example of dividing an individual area into areas based on the number of people. Zero areas or normal areas are shown in white, dense areas are shaded, and dense/close areas are gray. In FIG. 14(a), there are 11 zero areas or normal areas and 1 dense area, and in FIG. 14(b) there are 5 zero areas or normal areas, 6 dense areas, and 1 dense/close area. In FIG. 14C, there are 6 zero areas or normal areas, 1 dense area, and 5 dense/close areas.

FIG. 15 is a flow chart showing a method of classifying predetermined closed space states based on the number of areas by the congestion countermeasure system of this embodiment.
The control means 81 classifies the state of the predetermined closed space 1 based on the number of zero areas, normal areas, dense areas, and dense/close areas and the reference number. The reference number is, for example, half of the total number of individual regions 2 .
The individual area number determining unit 81b determines whether or not there is a normal area, a dense area, or a dense/close area (step S71).
When it is determined that there is no normal area, dense area, or dense/close area ("NO" in step S71), the control means 81 classifies the state of the predetermined closed space 1 based on the number of people into the fourth state of the number of people. do.
Further, when the individual area number determination unit 81b determines that there is a normal area, a dense area, or a dense/close area ("YES" in step S71), it determines whether a dense area or a dense/close area exists. Determine (step S72).
When it is determined that there is no dense area or dense/close area ("NO" in step S72), the control means 81 classifies the state of the predetermined closed space 1 based on the number of people into the first state of the number of people.
Further, when the individual area number determining unit 81b determines that there is a dense area or a dense/close area ("YES" in step S72), it determines whether the number of dense areas and dense/close areas is equal to or less than the reference number. Determine (step S73).
If the control means 81 determines that the number of dense areas and dense/close areas is equal to or less than the reference number (half or less) as shown in FIGS. When the state of the predetermined closed space 1 based on the number of people is classified into the second state of the number of people, and it is determined that the number of dense areas and dense/close areas is not equal to or less than the reference number (half or less) as shown in FIG. 14(b). ("NO" in step S73) classifies the state of the predetermined closed space 1 based on the human sensor 21 into the third state of the number of people.
In this way, the control means 81 sets the state of the predetermined closed space 1 to the first number state in which the presence of people is detected but there are no dense areas and dense/close areas, and one dense area and one dense/close area. Classify into one of the second state of the number of people above the standard number or less, the third state of the number of people in the dense area and the dense/close area exceeds the standard number, and the fourth state of the number of people in which the presence of people is not detected. .

Table 1 below is a table showing notifications by the congestion countermeasure system of the present embodiment.

As shown in Table 1, the warning display command means 85, when the presence of a person is detected by the human sensor 21 in any of the individual areas 2 (first, second, and third state of the number of persons), When the state of the predetermined closed space 1 based on the CO ₂ concentration is classified into the third CO ₂ concentration state, the warning display monitor 30b warns that the density of people and the degree of sealing in the entire predetermined closed space 1 exceed the standard. etc. will be notified. By visualizing the notification, it is possible to encourage people to leave the predetermined closed space 1, for example.
In addition, the warning display command means 85 regards the individual areas 2 classified as the dense area as the individual areas 2 whose density exceeds the standard, and regards the individual areas 2 classified as the dense/close area with the density Also, the warning display monitor 30b issues a warning or the like as the individual region 2 where the degree of density exceeds the standard. In this way, when the density of the individual area 2 exceeds the standard, the notification is visualized by changing the content depending on the degree of exceeding, so that appropriate movement from the individual area 2 can be urged.
In addition, the control means 81 controls the number of persons determining unit 22b to determine that the number of persons in one or more individual areas 2 is equal to or greater than the reference number of persons (second number of persons state or third number of persons state), and the number of persons There is no individual region 2 in which the number of people is determined to be equal to or greater than the reference number of people by the determining unit 22b (first number of people state), and the CO ₂ concentration determining unit 81a determines that the CO ₂ concentration is equal to or greater than the second threshold. In the case of (third CO ₂ concentration state), the warning lamp 30a is turned on. The control for this warning lamp 30a is the same as the control for the blower device 50 as will be described later.

The notification means 30 is preferably a warning lamp 30a or a warning display monitor 30b as in this embodiment. As a result, when the density exceeds the standard, the warning can be quickly and surely issued to the person in the predetermined closed space 1 or to the observer outside the predetermined closed space 1 by visualizing the notification. can.
For example, the momentary CO ₂ sensor value displayed on the warning display monitor 30b installed in the predetermined closed space 1 is displayed in white while being classified into the first CO ₂ concentration state or the second CO ₂ concentration state. , and when classified into the third CO ₂ concentration state, a blinking red display can be used to give a warning in a visually comprehensible manner.
Further, as shown in FIG. 16, by inverting the color of the individual area 2 whose density exceeds the reference among the plurality of individual areas 2 on the warning display monitor 30b, what kind of warning is given to which individual area 2. A person or the like in the predetermined closed space 1 can grasp at a glance whether or not it has been taken out. Note that the color indicating the warning level is, for example, “yellow” indicating warning level 1 for the dense area, and “red” indicating warning level 2 for the dense/close area.
Here, FIG. 17 is an image diagram of the warning display monitor. Information such as the current CO ₂ concentration, temperature, humidity, discomfort index, weather forecast, etc. is also displayed in addition to a warning about the degree of congestion based on the detection results of the CO ₂ sensor 11 and the human sensor 21 . Note that the warning display monitor 30b can also emit a warning sound or a warning voice regarding the degree of congestion.
In this way, by visualizing the environmental values and the congestion status of the predetermined closed space 1 (indoor), it is possible to constantly grasp the environment and the congestion status.

Table 2 below shows the control states of the ventilation device 40 , the blower device 50 , the air conditioner 60 , and the lighting device 70 .

As shown in Table 2, the control means 81, when the number of people determination unit 22b determines that the number of people in one or more individual areas 2 is greater than or equal to the reference number of people (second number of people state or third number of people state) case), the ventilator 40 is set to the high operation mode and the blower 50 is operated. In this way, if even one high-density area or high-density/high-density area occurs, maximizing ventilation even when the _CO2 concentration is below the first threshold will The generated predetermined closed space 1 can be sufficiently ventilated to reduce the risk of airborne infection.

In addition, when the number of individual areas 2 having the number of persons equal to or greater than the reference number is determined by the individual area number determination unit 81b to be one or more and equal to or less than the reference number (in the second state of the number of persons), the control means 81 controls the CO ₂ When the concentration determination unit 81a determines that the CO ₂ concentration is less than the second threshold (the first CO 2 concentration state or the second CO 2 concentration state), the ventilation device 40 is set to the high operation mode and the blower device 50 is turned on. When the CO ₂ concentration determining unit 81a determines that the CO ₂ concentration is equal to or higher than the second threshold without changing the set temperature of the air conditioner 60 and the set luminance of the lighting device 70 (third CO ₂ Concentration state) sets the ventilator 40 to the strong operation mode to operate the blower 50 , lowers the set temperature of the air conditioner 60 , and raises the set brightness of the lighting device 70 .
In this way, when the CO ₂ concentration is equal to or higher than the second threshold, the set temperature of the air conditioner 60 is lowered even if the number of dense areas and dense/close areas is less than or equal to the number of other areas. Control is performed to increase the set luminance of the lighting device 70 . As a result, in addition to the notification by the notification means 30, it is possible to give a sensory or visual stimulus to notify that the degree of density and degree of sealing in the predetermined closed space 1 is increasing.

In addition, when the number of individual areas combined with the dense area and the dense/close area exceeds the reference number (in the case of the third number of people), the control means 81 lowers the set temperature of the air conditioner 60, Increase the brightness setting.
In this way, when the number of dense areas and dense/close areas is greater than the number of other areas, the set temperature of the air conditioner 60 is lowered even if the CO ₂ concentration is less than the first threshold. , control is performed to increase the set luminance of the lighting equipment 70 . Thereby, in addition to notification by the notification means 30, it is possible to notify the occurrence of a large number of individual areas 2 in a dense state or a dense/close-contact state by providing a sensory or visual stimulus.
At this time, when increasing the set brightness of the lighting device 70, the control means 81 preferably repeats raising and lowering the set brightness for a predetermined period of time as a warning that the number of individual areas 2 for which the number of people is greater than the reference number exceeds the reference number.
As a result, the visual stimulus is increased, so that it is possible to clearly notify the occurrence of a large number of individual regions 2 in a dense state or a dense/close-contact state.

Further, when there is no individual region 2 in which the number of persons determined by the number-of-persons determining unit 22b to be equal to or larger than the reference number of persons (first number-of-people state), the control means 81 performs control as follows.
(1) When the CO ₂ concentration determination unit 81a determines that the CO ₂ concentration is less than the first threshold value (in the case of the first CO ₂ concentration state), the ventilation device 40 is set to the weak operation mode, and the blower device 50 is not operated, the set temperature of the air conditioner 60 is not changed, and the set luminance of the lighting device 70 is not changed.
(2) When the CO ₂ concentration determination unit 81a determines that the CO ₂ concentration is equal to or greater than the first threshold value and less than the second threshold value (in the case of the second CO ₂ concentration state), the ventilator 40 is set to the strong operation mode. , the air blower 50 is not operated, the temperature setting of the air conditioner 60 is not changed, and the brightness setting of the lighting device 70 is not changed.
(3) When the CO ₂ concentration determination unit 81a determines that the CO ₂ concentration is equal to or higher than the second threshold value (in the case of the third CO ₂ concentration state), the ventilation device 40 is set to the high operation mode, and the blower device 50 to lower the set temperature of the air conditioner 60 and raise the set brightness of the lighting device 70 .
In this way, by controlling the operations of the ventilation device 40, the blower device 50, the air conditioner 60, and the lighting device 70 based on the state of the entire predetermined closed space 1 and the state of the individual areas 2, the environment of the predetermined closed space can be effectively improved.

Further, when the absence of people in the predetermined closed space 1 is detected (in the case of the fourth state of the number of people), the control means 81 does not operate the ventilation device 40 or sets it to a weak operation mode, and operates the blower device 50. First, the air conditioner 60 is not operated, or is operated within a range of +2° C. during cooling and −2° C. during heating with respect to the set temperature, and the lighting device 70 is turned off or has a brightness higher than the set brightness. Lower.

In this way, the ventilation device 40, the blower device 50, the air conditioner 60, and the lighting device 70 combine the determination result of the CO ₂ concentration determination unit 81a and the determination result of the number of people determination unit 22b, that is, the entire predetermined closed space 1. It is controlled based on the situation and the situation change of a part thereof (individual area 2).
By operating the ventilation device 40 in the strong operation mode and operating the blower device 50, the predetermined closed space 1 is sufficiently ventilated, the temperature of the air conditioner 60 is lowered, and the set brightness of the lighting device 70 is lowered. By raising it, it is possible to notify the occurrence of a dense state or a dense/close-contact state sensibly or visually. As a result, the spread of infectious diseases can be effectively suppressed. In addition, the reduction in temperature by the air conditioner 60 and the increase in the brightness of the lighting device 70 have the effect of stimulating the people in the predetermined closed space 1 and preventing a decrease in work efficiency due to drowsiness.

1 Predetermined closed space 2 Individual area 3 Small area 10 _CO2 sensor unit 11 _CO2 sensor 12 Communication unit 20 Human sensor unit 21 Human sensor 22 Density determination means 22a People calculation unit 22b People determination unit 23 Communication unit 30 Notification means 30a Warning lamp 30b Warning display monitor 31 Warning lamp controller 32 Warning display server 40 Ventilation device 41 Ventilation controller 50 Blower device 51 Blower controller 60 Air conditioner 61 Air conditioner controller 70 Lighting device 71 Lighting controller 80 Central control server 81 Control Means 81a CO ₂ concentration determination unit 81b Individual area number determination unit 81c Control command unit 82 Wireless communication unit 83 Storage unit 84 Schedule setting unit 85 Warning display command unit 90 Infrared remote control node 91 Wireless communication unit 92 Wireless/infrared conversion unit 93 Infrared communication Unit 100 Judgment frame 101 Judgment frame

Claims (17)

a CO ₂ sensor that detects the CO ₂ concentration in a predetermined closed space;
a human detection sensor that detects the presence of a person in a plurality of separate areas obtained by dividing the predetermined closed space;
a ventilation device that has a weak operation mode and a strong operation mode and performs ventilation of the predetermined closed space;
an informing means for informing about the density of the people;
density determination means for determining density in the individual regions;
A centralized management server for controlling notification by the notification means and ventilation by the ventilation equipment,
The density determination means includes a people calculation unit that calculates the number of people in each of the individual areas based on the detection result of the human sensor, and whether or not the number of people calculated by the people calculation unit is equal to or greater than a reference number when the number of people calculated by the people calculation unit is not zero. and a number-of-people determination unit that determines
The centralized control server has _a CO ₂ concentration determination unit that determines whether the CO ₂ concentration detected by the CO ₂ sensor is equal to or greater than a threshold value. Controlling ventilation by the ventilation equipment based on the combination with the determination result,
If the CO ₂ concentration value is determined to be equal to or greater than a predetermined threshold value, the notification means notifies that the density and the degree of sealing have exceeded the standard,
When the number of people is determined to be equal to or greater than the reference number of people, the notification means notifies the individual area in which the number of people is determined to be equal to or greater than the reference number of people as the individual area having the density exceeding the standard. A crowd control system characterized by Further comprising a blower that blows air in the predetermined closed space,
2. The crowd according to claim 1, wherein the central control server controls air blowing by the air blower based on a combination of the determination result of the CO ₂ concentration determining unit and the determination result of the number of people determining unit. countermeasure system. 3. The congestion countermeasure system according to claim 1, wherein said notification means is a warning lamp or a warning display monitor displaying a warning display. As the standard number of people, a first standard number of people and a second standard number of people larger than the first standard number of people are set,
The centralized management server
The notification means notifies the individual region in which the number of people is determined to be equal to or more than the first reference number of people and less than the second reference number of people by the number determination unit as the individual region in which the density exceeds the reference,
The individual area determined by the number-of-persons determining unit to have the number of people equal to or greater than the second reference number of people is notified by the notifying means as the individual area having the density and the degree of closeness exceeding the reference. The crowd control system according to any one of claims 1 to 3. The individual area is set to 3 m to 4 m square in floor view, the first reference number of people is set to 4 to 5 people, and the second reference number of people is set to 6 to 7 people. The congestion countermeasure system according to claim 4. As the threshold, a first threshold and a second threshold higher than the first threshold are set,
When the CO ₂ concentration determination unit determines that the CO ₂ concentration is equal to or greater than the second threshold value, the centralized control server notifies that the density and the degree of sealing of the predetermined closed space have exceeded standards. 6. The crowd control system according to any one of claims 1 to 5, wherein notification is made from means. When the number of people determining unit determines that the number of people in one or more of the individual areas is equal to or greater than the reference number of people, the centralized control server sets the ventilation device to the high operation mode and operates the blower device. 3. The crowd control system according to claim 2, which is activated. The centralized control server, when there is no individual area for which the number of people is determined to be equal to or greater than the reference number of people by the number of people determining unit,
When the CO ₂ concentration determination unit determines that the CO ₂ concentration is less than the first threshold value, the ventilation device is set to the weak operation mode and the blower device is not operated,
When the CO ₂ concentration determining unit determines that the CO ₂ concentration is greater than or equal to the first threshold value and less than the second threshold value, the ventilation device is set to the strong operation mode, and the blower device is not operated. ,
When the CO ₂ concentration determination unit determines that the CO ₂ concentration is equal to or higher than the second threshold value, the ventilation device is set to the strong operation mode and the blower device is operated. 7. The crowd control system according to claim 6, citing claim 2. Further comprising an air conditioner for adjusting the temperature of the predetermined closed space,
The central control server controls temperature adjustment by the air conditioner based on a combination of the determination result of the CO ₂ concentration determination unit and the determination result of the number of people determination unit. 9. The crowd control system according to any one of 8. The centralized management server
further comprising an individual region number determination unit that determines whether or not the number of the individual regions for which the number of people is determined to be equal to or greater than the reference number by the number determination unit exceeds a reference number;
10. The countermeasure against congestion according to claim 9, wherein when the individual area number determination unit determines that the number of the individual areas where the number of people is equal to or greater than the reference number exceeds the reference number, the set temperature of the air conditioner is lowered. system. The centralized control server, when there is no individual area for which the number of people is determined to be equal to or greater than the reference number of people by the number of people determining unit,
When the CO ₂ concentration determination unit determines that the CO ₂ concentration is less than the first threshold value, the ventilator is set to the weak operation mode, and the set temperature of the air conditioner is not changed,
When the CO ₂ concentration determination unit determines that the CO ₂ concentration is greater than or equal to the first threshold value and less than the second threshold value, the ventilator is set to the strong operation mode, and the set temperature of the air conditioner is set. without changing
When the CO ₂ concentration determination unit determines that the CO ₂ concentration is equal to or higher than the second threshold value, the ventilator is set to the strong operation mode and the set temperature of the air conditioner is lowered. The crowd control system according to claim 9 quoting claim 6 as When the number of individual areas determining unit determines that the number of individual areas for which the number of persons is equal to or greater than the reference number is one or more and is equal to or less than the reference number, the centralized management server
When the CO ₂ concentration determination unit determines that the CO ₂ concentration is less than the second threshold, the ventilator is set to the strong operation mode, and the set temperature of the air conditioner is not changed,
When the CO ₂ concentration determination unit determines that the CO ₂ concentration is equal to or higher than the second threshold value, the ventilator is set to the strong operation mode and the set temperature of the air conditioner is lowered. 11. The crowd control system according to claim 10 , further quoting claim 9 quoting claim 6. further comprising a lighting device for dimming the predetermined closed space,
The central control server controls dimming by the lighting equipment based on a combination of the determination result of the CO ₂ concentration determination unit and the determination result of the number of people determination unit. 13. The crowd control system according to any one of 12. The centralized management server
further comprising an individual region number determination unit that determines whether or not the number of the individual regions for which the number of people is determined to be equal to or greater than the reference number by the number determination unit exceeds a reference number;
14. The countermeasure against crowding according to claim 13, wherein when the individual area number determination unit determines that the number of the individual areas in which the number of persons is equal to or greater than the reference number exceeds the reference number, the set brightness of the lighting equipment is increased. system. The central control server is characterized in that, when increasing the set brightness of the lighting device, the set brightness is repeatedly raised and lowered for a predetermined time as a warning that the number of the individual areas with the number of persons equal to or greater than the reference number exceeds the reference number. The congestion countermeasure system according to claim 14. The centralized control server, when there is no individual area for which the number of people is determined to be equal to or greater than the reference number of people by the number of people determining unit,
When the CO ₂ concentration determination unit determines that the CO ₂ concentration is less than the first threshold, the ventilation device is set to the weak operation mode, and the brightness setting of the lighting device is not changed,
When the CO ₂ concentration determination unit determines that the CO ₂ concentration is greater than or equal to the first threshold value and less than the second threshold value, the ventilator is set to the strong operation mode, and the set luminance of the lighting device is set. without changing
When the CO ₂ concentration determination unit determines that the CO ₂ concentration is equal to or higher than the second threshold, the ventilation device is set to the strong operation mode and the set luminance of the lighting device is increased. 14. The crowd control system according to claim 13, quoting claim 6 as above. When the number of individual areas determining unit determines that the number of individual areas for which the number of persons is equal to or greater than the reference number is one or more and is equal to or less than the reference number, the centralized management server
When the CO ₂ concentration determination unit determines that the CO ₂ concentration is less than the second threshold, the ventilation device is set to the strong operation mode, and the set luminance of the lighting device is not changed,
When the CO ₂ concentration determination unit determines that the CO ₂ concentration is equal to or higher than the second threshold, the ventilation device is set to the strong operation mode and the set luminance of the lighting device is increased. 15. The crowd control system according to claim 14, quoting claim 6 as above.

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