JP2022133669A - Contact history acquisition system, mobile terminal program, and server program - Google Patents

Abstract

To provide a contact history acquisition system capable of grasping dates and locations when and where people contact one another.SOLUTION: A contact history acquisition system includes beacon transmitters 200 installed in a plurality of locations; a mobile terminal 400 capable of receiving beacons of the beacon transmitters; and a server 500 for acquiring reception information of the beacons from the mobile terminal. The server 500 includes a contact history calculation section 510 for calculating a contact history for an owner of the mobile terminal from the reception information, and the contact history includes dates and locations when and where the owner has contacted other owners.SELECTED DRAWING: Figure 1

Description

The present invention relates to a contact history acquisition system, a portable terminal program, and a server program thereof.

In recent years, various researches and developments have been made on checking the movement of human resources using GPS or the like. For example, Patent Literature 1 (Japanese Patent Application Laid-Open No. 2015-61082) discloses a map information providing system that displays a three-dimensional position in a facility and a floor map corresponding to the position on a mobile terminal.

In addition, Patent Document 2 (Japanese Unexamined Patent Application Publication No. 2020-076596) discloses an employee position movement display system that enables smooth display. The employee position movement display system of Patent Document 2 describes the relationship between an employee's mobile terminal, a plurality of USB beacon communication units that can communicate with the mobile terminal, and the plurality of USB beacon communication units and the mobile terminal. and a display unit for displaying the current position of the employee. When the movement of the mobile terminal is displayed on the display unit, the control unit includes a processing unit for smoothly processing the display of the movement. is disclosed.

In addition, Patent Document 3 (Japanese Patent Application Laid-Open No. 2015-184248) discloses an indoor positioning device capable of efficiently positioning a user's indoor position at low installation cost, covering a wide range. The indoor positioning device of Patent Document 3 has a movable camera that can rotate and zoom. A control signal is sent to direct the movable camera to the direction of the moving object, the camera is photographed, and the photographed image is received. A mobile terminal with a PDR function sends the measurement data of the mounted PDR sensor to a server via a network. The server compares the movement vector of the moving object included in the captured image with the movement vector obtained from the measurement data of the sensor, and if they are similar, determines that the pedestrian is the pedestrian and obtains the position information obtained from the captured image. It is sent to a mobile terminal with a PDR function to accurately update the location information of the mobile terminal. It is also disclosed that a beacon may detect the approach of a pedestrian to the movable camera.

In addition, Patent Document 4 (Japanese Patent Application Laid-Open No. 2016-217931) discloses a mobile search server that efficiently and effectively searches for the position of a mobile using a device that transmits and a device that receives a beacon signal. It is The mobile search server of Patent Document 4 can communicate with mobile terminals, which are receivers of beacon signals, held by users located within a certain range and by mobile searchers, via a wireless network. A user location registration unit that receives and records location information, information specifying a beacon device, and information related to radio wave intensity from a terminal, and receives an instruction to search for a beacon device to be searched from a mobile terminal held by a searcher. and a beacon position calculation unit that calculates the position information of the beacon device to be searched based on the distance between the position information of each mobile terminal and the beacon device.

In addition, Non-Patent Document 1 (New Coronavirus Contact Confirmation Application (COCOA)) describes the description of "New Coronavirus Contact Confirmation Application (COCOA)", and the proximity communication function of smartphones (Bluetooth (registered trademark) ) to ensure privacy from each other and to be notified about the possibility of contact with a person who has tested positive for COVID-19. According to Non-Patent Document 1, the user can quickly receive support from the public health center, such as taking a test, by knowing the possibility of contact with a positive person.

JP-A-2015-61082 JP 2020-076596 A JP 2015-184248 A JP 2016-217931 A

“New coronavirus contact confirmation application (COCOA)”, Internet <URL: https://www. mhlw. go. jp/stf/seisakuunitsuite/bunya/cocoa_00138. html>

By using the technology disclosed in Patent Literature 1, it is possible to see the movement of employees. However, there was a problem that it was not possible to obtain information on how much people were in contact with each other in the building.
Further, by using the technique disclosed in Patent Document 2, it is possible to obtain movement information of employees within the building. However, there was a problem that it was not possible to obtain information on how much contact was made between people.
Also, by using the technique disclosed in Patent Document 3, it is possible to obtain positional information of people in a building. However, there was a problem that it was not possible to obtain information on how much contact was made between people. In addition, there are also the problems of the cost of installing cameras in each location and the occurrence of blind spots.
In addition, it is possible to search for the whereabouts of a moving object (person) by using the technique disclosed in the patent document. However, from the viewpoint of measures against infectious diseases, there is a problem that it is not possible to obtain information on the degree of contact between people.

Also, by using the technique of Non-Patent Document 1, contact with an infected person can be known after the fact. However, there is a problem that it is not possible to know the place where the infected person came into contact, and it is impossible to analyze what kind of place is at risk of infection.

A main object of the present invention is to provide a contact history acquisition system capable of ascertaining the date, time and place of contact between people.
Another object of the present invention is to provide a contact history acquisition system capable of tracking close contacts in infectious disease countermeasures.
Another object of the present invention is to provide a contact history acquisition system capable of identifying locations and times of high infection risk in infectious disease countermeasures.
Another object of the present invention is to provide a contact history acquisition system that can prevent in advance from becoming a close contact.

(1)
A contact history acquisition system according to one aspect includes beacon transmitting devices installed at a plurality of locations, a mobile terminal capable of communicating with the beacons of the beacon transmitting devices, and a server that acquires beacon reception information from the mobile terminal, The server has a contact history calculation unit that calculates a contact history between the first owner of the mobile terminal and the second owner of the mobile terminal from the received information. Include date, time and place of contact.

This allows the server to record which mobile terminal received which beacon at which location and when. In this way, it is possible to identify when, where, and with whom the owner of each mobile terminal was in the same place. Then, for example, by defining contact as when two or more people have been together for 15 minutes or longer within a distance of 3 meters, it is possible to accurately grasp the date and place of contact between people. .
In addition, by identifying the place of contact, it is possible to track close contacts, such as whether the contact occurred in a place with a high risk of infection, such as a dining room, changing room, or smoking area, or whether the contact occurred in a well-ventilated environment.

(2)
A contact history acquisition system according to a second invention is a contact history acquisition system according to one aspect, wherein the contact history further includes the contact time and the number of times the first owner contacts the second owner. can be

As a result, it is possible to extract long-term and frequent contacts with a high risk of infection, so it is possible to accurately investigate close contacts. In addition, it is possible to extract people who have been in a place with a high risk of infection for more than a certain period of time.
In addition, since infectious diseases develop after an incubation period after exposure to a virus or the like, infection may become apparent after a considerable amount of time has passed since contact. Since it is possible to check the history of contact during a specific period, even if an infected person is found after the fact, it is possible to trace the close contacts that the infected person came into contact with after being infected.

(3)
A contact history acquisition system according to a third invention is the contact history acquisition system according to the first aspect or the second invention, wherein the server has a crowded place calculation unit that records the congestion status of the place, The department may record the time evolution of the congestion status of the place.

This makes it possible to identify places and times when there is a high risk of infection. In addition, since it is possible to check which places are likely to be crowded at what time, it can be used to avoid the three Cs (close contact, crowds, and closed spaces), which increase the risk of infection.
In addition, since it is possible to grasp the congestion status of each location in real time, it is possible to encourage behavior to avoid congestion by displaying the congestion status on smartphone screens (apps) and displays near the entrances and exits of each location. can.

(4)
A contact history acquisition system according to a fourth aspect is the contact history acquisition system according to the first aspect to the third aspect, wherein the contact history calculation unit calculates the moving route of the owner from the received information, A first owner and a second owner may come into contact when the owner's travel route and the second owner's travel route and travel time are the same.

As a result, even if there is a situation in which it is temporarily impossible to receive radio waves from a beacon while moving, it is possible to accurately calculate contact between people. For example, even in the case of getting on an elevator while moving between floors, contact between people can be accurately calculated.

(5)
A contact history acquisition system according to a fifth aspect is the contact history acquisition system according to the first aspect to the fourth aspect, wherein the mobile terminal has a predetermined time when the first owner contacts the second owner. threshold is exceeded, the first owner and the second owner may be notified.

When multiple people are within a certain distance and stay together for a certain amount of time, the mobile terminal will sound an alarm. This can prevent you from coming into close contact with other people in advance.
In this case, the threshold may be the same value as the contact definition value, or it may be set to a greater distance and/or less time than the contact definition value, such as 14 minutes or more within 4 meters.

(6)
A contact history acquisition system according to a sixth invention is the contact history acquisition system according to the first aspect to the fifth invention, and the beacon transmission device may be installed on the ceiling, wall surface, desk, or floor of the office.

This makes it possible to grasp the movement and contact information of employees working in the office, as well as the congestion status of each room in the office. In addition, since the beacon transmission device is embedded in the ceiling or floor, the design is excellent, and employees can work without being aware of the existence of the beacon.

(7)
A contact history acquisition system according to a seventh invention is the contact history acquisition system according to the first aspect to the sixth invention, wherein the beacon transmitting device further comprises a thermometer, a hygrometer and/or a carbon dioxide concentration meter, The temperature, humidity and/or carbon dioxide concentration of the location may be communicated to the server.

This makes it possible to obtain environmental information such as low temperature, low hygrometer and/or high carbon dioxide concentration even at the same location. Therefore, infection can be avoided by notifying in real time of a place with a high infectious disease risk. In addition, when a cluster (a group of infected people) occurs, the environment can be analyzed.
Environmental measuring instruments such as thermometers, hygrometers, and carbon dioxide concentration meters can be added as options to the beacon transmitter. Environmental measurement data may be directly notified from the beacon transmitting device to the server, or may be notified to the server via communication with the mobile terminal.

(8)
A contact history acquisition system according to an eighth invention is the contact history acquisition system according to the third invention, wherein the designated period is from two days before the date on which the first owner developed an infectious disease to after the date of onset. It may be up to 14 days.

The novel coronavirus infection (CVID-19) is said to have high viral shedding from 2 days before the onset to 14 days after the onset. Therefore, by extracting contacts during a period when the amount of virus shedding is high, close contacts can be accurately tracked.
Alternatively, the specified period may be up to 6 days after the onset of symptoms, or up to 10 days after the onset of symptoms, when the virus activity is said to be extremely weakened.

(9)
A mobile terminal program according to another aspect is the contact history acquisition system according to the first aspect or the second invention, wherein the server has a crowded place calculation unit that records the congestion status of the place, You may display a crowded place on the display part of a terminal.

As a result, the server administrator or the owner of the mobile terminal can know which place is crowded while staying at another place. Since it is possible to grasp the congestion status of each place in real time, it is possible to encourage actions to avoid congestion.

(10)
A mobile terminal program according to another aspect is a contact history acquisition system according to one aspect, and may include beacon reception processing for receiving a beacon from a beacon transmitting device and reception information transmission processing for transmitting reception information to a server. .

As a result, it is possible to grasp the date, time, and place of person-to-person contact. In addition, it is possible to track close contacts in infectious disease control.

(11)
A server program according to still another aspect is a contact history acquisition system according to one aspect, and includes reception information acquisition processing for acquiring beacon reception information from a mobile terminal, and calculation of the contact history of the owner of the mobile terminal from the reception information. and a contact history calculation process.

As a result, it is possible to grasp the date, time, and place of person-to-person contact. In addition, it is possible to track close contacts in infectious disease control.

1 is a schematic diagram showing an example of a contact history acquisition system according to an embodiment; FIG. FIG. 4 is a schematic diagram for explaining communication between a beacon transmitting device and a mobile terminal; FIG. 2 is a schematic diagram for explaining an example of a display of the contact history acquisition system of FIG. 1; FIG. 2 is a schematic diagram for explaining an example of a display of the contact history acquisition system of FIG. 1; FIG. 4 is a schematic diagram for explaining an example of display on a mobile terminal; It is a schematic diagram which shows an example of a contact history acquisition system. 10 is a flow chart showing another example of a contact history acquisition system; FIG. 2 is a schematic diagram for explaining communication of a plurality of moving mobile terminals;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same parts are given the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

<Embodiment>
FIG. 1 is a schematic diagram showing an example of a contact history acquisition system 100 according to this embodiment, and FIG. 2 is a schematic diagram for explaining an example of a display unit 600 of the contact history acquisition system 100 of FIG. .

As shown in FIG. 1, the contact history acquisition system 100 includes beacon transmitting devices 200 installed at a plurality of locations, mobile terminals 400 owned by employees in offices and the like, and servers that receive beacon reception information from the mobile terminals 400. 500 included. The server 500 may be provided with a display unit 550 for displaying the output of the server 500 , or may be connected to the administrator terminal 300 to display the output of the server 500 .
The server 500 includes a contact history calculator 510 that calculates employee contact history and the like from beacon reception information, and a crowded place calculator 520 that calculates the congestion status of each place from the employee contact history information. The contact history calculation unit 510 may calculate the cumulative contact time between employees, etc. from information on the employee's contact history.

Here, in this embodiment, a case of acquiring employee contact information in an office will be described, but the present invention is not limited to use in an office or a building, and can be used in an outdoor facility such as an amusement park, Alternatively, it can be applied outdoors such as in a wider municipality unit. For example, in the case of an amusement park, it is possible to grasp the contact information between users and the state of congestion of the playground equipment by using the users instead of the employees and the playground equipment instead of the conference room.

As shown in FIG. 1, in the present embodiment, server 500 can communicate with mobile terminal 400 via the Internet or the like. A specific application may be installed in the mobile terminal 400 , thereby enabling smooth communication with the server 500 and displaying information from the server 500 .
A mobile terminal 400 can communicate with a plurality of beacon transmitting devices 200 . The mobile terminal 400 can receive beacon signals from the beacon transmitting devices 200 installed in various places and acquire position information of the mobile terminal 400 . In acquiring the location information of the mobile terminal 400, in addition to the beacon signal from the beacon transmitting device 200, a wireless LAN (Wi-Fi) signal and/or a GPS (Global Positioning System) signal is received to acquire the location information. or may be refined.
Also, the server 500 may be capable of communicating with a plurality of beacon transmitting devices 200 . In this case, the unique information of the mobile terminal 400 is read by the plurality of beacon transmitting devices 200 , and the beacon transmitting device 200 transmits the unique information to the server 500 , so that the server 500 recognizes the location of the mobile terminal 400 .

(Acquisition of location information)
FIG. 2 is a schematic diagram for explaining an example of communication between the beacon transmitting device 200 and the mobile terminal 400. As shown in FIG. As shown in FIG. 2, a plurality of beacon transmitting devices 200 can be installed in the ceiling, on the wall, on the desk, or under the floor.
A unique ID (number or the like) is assigned to the installed beacon transmitting device 200, and the beacon transmitted from the beacon transmitting device 200 includes information on the unique ID. Therefore, the mobile terminal 400 that has received the beacon knows which beacon transmitting device 200 has received the beacon and the radio wave intensity of the beacon. Since the unique ID of the beacon transmitting device 200 installed at each location is recorded in the server 500, it is possible to recognize which beacon transmitting device 200 each mobile terminal 400 is communicating with. can.
Communication between the server 500 and the mobile terminal 400 is preferably performed in real time, but by accumulating beacon reception information in the mobile terminal 400, transmission and reception may be performed at regular time intervals. Thereby, the power consumption of the mobile terminal 400 can be reduced.

Specifically, the beacon transmitting device 200 can use a BLE beacon or the like, is powered by a DC power supply or a USB bus power supply, or the like, and transmits a Bluetooth (registered trademark) beacon signal. send. By using the BLE beacon, transmission can be performed with low power consumption, and the radio wave intensity and transmission interval can be adjusted appropriately according to the installation location.
Mobile terminal 400 transmits beacon signal reception information (unique ID and radio wave intensity information) to server 500 . As a result, it is possible to recognize which beacon transmitting device 200 among the plurality of beacon transmitting devices 200 the mobile terminal 400 is located near.

In the example shown in FIG. 2, as the beacon transmitting devices 200, a beacon transmitting device 200a, a beacon transmitting device 200b, and a beacon transmitting device 200c are arranged.
In this case, mobile terminal 400 receives beacon signals from beacon transmitting devices 200a and 200b. Therefore, by comparing the radio wave intensity Ia of the beacon transmitting device 200a and the radio wave intensity Ib of the beacon transmitting device 200b, it is possible to grasp the position of the mobile terminal 400 with respect to the beacon transmitting devices 200a and 200b.

When the mobile terminal 400 receives one beacon signal, the position information of the employee is about the range of the beacon of the beacon transmitting device 200 . On the other hand, when the number of beacon signals received by the mobile terminal 400 is two or more, it is possible to acquire the employee's location information in more detail by the mechanism described above.
Since the strength of the beacon signal is also affected by obstacles and the like, the more beacon transmitting devices 200 installed, the more detailed position information can be obtained.

It should be noted that if the user does not want to receive the beacon signal from the next conference room, it is possible to set the radio wave intensity of the beacon transmitting device 200 installed in the conference room to be weak. In this case, the position information of the mobile terminal 400 may be calculated after correcting the radio wave intensity of each beacon transmitting device 200 .

(Leveling processing of location information)
As shown in FIG. 6, the location information of the mobile terminal 400s detected by the beacon transmitting device 200 is not always stably obtained. In particular, as shown in FIG. 6, the same mobile terminal 400s may be subject to various influences, such as the communication environment, obstacles, or other employees blocking radio waves, causing variations in location information. For example, when many employees are close to each other, or when they are close to each other across a desk or personal computer, the position information may vary.
Therefore, it is preferable that the server 500 equalizes the location information detected by the relationship between the beacon transmitting device 200 and the mobile terminal 400 multiple times.

When performing the leveling process, as shown in FIG. 7, the server 500 detects the position from the relationship between the beacon transmitting device 200 and the mobile terminal 400 (step S1).
Next, server 500 detects the next position from the relationship between beacon transmitting device 200 and mobile terminal 400 (step S2). The next position here includes the case where mobile terminal 400 has not moved after a predetermined time.

Next, the server 500 determines whether or not the location information of the mobile terminal 400 has been acquired a predetermined number of times (eg, five times) (step S3). When the predetermined number of times has been exceeded, the server 500 averages the positions of the mobile terminals 400 to level them (step S4). In the present embodiment, the average position of a predetermined number of times is taken and leveled.

(Calculation of contact history)
As described above, the server 500 can obtain the location information of each employee. Then, when two or more employees are at the same place at the same time, the server 500 determines that each employee has made contact. In this case, the administrator of this system can preset in the server 500 the time and distance for determining contact.
For example, if two or more employees have been together within 3 meters for 15 minutes or more, contact can be determined. As a result, if an employee is found to be infected with an infectious disease at a later date, it is possible to identify the employee's close contacts (those who have been together for more than 15 minutes within 3 meters).

Note that the definition of contact may be changed after the fact. In other words, the location information of each employee may be recorded for a certain period of time so that contact information with different conditions, such as those who have been together for more than 5 minutes within 1 meter, can be extracted after the fact. This will allow for more detailed contact tracing.
In this way, the server 500 can calculate when, where, with whom, and to what extent each employee has been in contact.
Contact information can also be used to take steps to reduce contact, such as taking meetings offline.

(Calculation of congestion status)
The server 500 can grasp the population density in the office in real time by acquiring the location information of each employee. In this way, hourly congestion conditions are calculated for each location in the office.
Furthermore, the server 500 can calculate how often contact occurs at each location. Therefore, it is possible to identify places and time zones where close contact is likely to occur. As a result, it is possible to grasp the places and time zones where the risk of mass infection (cluster) is high, so that it is possible to take measures in advance and prevent the spread of infection.
Also, for example, it is possible to extract a group of employees having lunch in a large number during a time period when the cafeteria is crowded. In other words, this makes it possible to grasp employees who are in places where outbreaks are likely to occur, so it is possible to analyze what kind of employee behavior affects cluster formation, and to analyze the behavior of high-risk employees. Specific precautions can be taken against
Alternatively, countermeasures such as detecting a crowded place and changing the arrangement or placing a partition between them can be taken.

(Output of contact history acquisition system 100)
The calculation result of the contact history acquisition system 100 is displayed on the screen of the display unit 550 and/or the administrator terminal 300 .
Also, part or all of the calculation results may be displayed on the mobile terminal 400 of the employee by setting by the administrator of the contact history acquisition system 100 .

FIGS. 3A and 3B are schematic diagrams for explaining an example of a display screen for an administrator output by the contact history acquisition system 100 of this embodiment. 3A and 3B are displayed on display unit 550 and administrator terminal 300 in this embodiment.
FIG. 3(a) displays the congestion status on each floor of the building for each day of the week, and FIG. 3(b) displays the congestion status on the office floor. As a result, for example, it is possible to avoid congestion and reduce the frequency of close contact by ascertaining the days of the week and time periods when the break room is crowded.
In addition, as shown in FIG. 3(b), it is possible to see the time transition of crowded places on the floor and the behavior history of each employee, so it is possible to analyze what kind of department employees tend to gather in a specific place. can be done. As a result, it is possible to take countermeasures against congestion in the office, for example, by staggering the starting time of the department that is causing congestion in the changing room. In addition, if the degree of congestion or the time of day differs depending on the department of the company, the layout of the office may be changed so as to avoid the congestion.

FIG. 4 is a schematic diagram for explaining an example of a display screen for a manager output by the contact history acquisition system 100 of the present embodiment, which outputs contact persons for each employee. In this embodiment, FIG. 4 is displayed on display unit 550 and administrator terminal 300 .
On the screen of FIG. 4, when the administrator selects the period to be extracted and the name of the target employee, the number of days of contact with the target employee, each contact date, and the total contact time are displayed in a list.
Since the cumulative contact time with each employee is displayed, even if it is a short time, you will not miss the case of frequent contact. In addition, employees who have frequent or frequent contact with each other can take measures against contact, such as using telework or changing the seat position. In addition, employees with a large number of rows in the list of contacts in Figure 4, that is, employees who contact many people in a short period of time, may form clusters in the future. Contact measures can be taken intensively from
In addition, if an infected person is found, it is possible to trace close contacts.

FIG. 5 is a schematic diagram for explaining an example of the display on the employee's mobile terminal 400. As shown in FIG. This allows employees to grasp the congestion situation by floor or by area in real time. Therefore, employees can reduce their risk of infection by taking actions to avoid congestion in advance.

The mobile terminal 400 may notify the employee of the congestion by sounding an alarm or by vibrating when the congestion situation at the location where the employee is located exceeds a threshold. Specifically, the application installed in the mobile terminal 400 communicates with the server 500 to receive notification that the congestion situation has exceeded the threshold, and notifies the employee of this by an alarm sound or vibration. This makes it possible for the employee to know that the place where he or she is now is getting crowded.
In addition, when the time of contact with another employee exceeds a threshold, the mobile terminal 400 may notify the employee that the contact time is long by sounding an alarm or vibrating. As a result, close contact between an employee and another employee can be prevented.

(Contact with movement)
When the mobile terminals 400a and 400b move in contact with each other and there is a place B in the middle of the movement path where the radio wave of the beacon of the beacon transmitting device 200 does not reach, the employees come into contact with each other before and after the place B. If so, the employees are likely to be in contact with each other during their stay at location B as well. A description will be given using a specific example in FIG.

FIG. 8 is a schematic diagram for explaining communication of a plurality of moving mobile terminals 400a and 400b. The owner of the mobile terminal 400a and the owner of the mobile terminal 400b meet in the beacon area of the beacon transmitting device 201a, then move together and separate in the beacon area of the beacon transmitting device 201c.
In this case, it is assumed that the bold line portion of both routes satisfies the definition of the contact distance (for example, within 3 meters). Here, even if there is a place B where the radio waves of the beacon transmitting device 201b and the beacon transmitting device 201c do not reach in the middle of both paths, if the definition of the contact distance before and after the place B is satisfied, , add to the time of contact between the two. If this satisfies the definition of contact time (for example, 15 minutes or more), both sides are deemed to have satisfied the definition of contact (for example, 15 minutes or more within 3 meters).

In this way, in contact history acquisition system 100 in the present embodiment, by calculating the moving routes of a plurality of mobile terminals 400a and 400b, the moving routes of the owner and the moving routes and moving times of other owners can be calculated. In the same case, it is calculated that the owner and another owner have come into contact. As a result, contact between people can be reliably detected even when they are moving.

As a result, for example, when employees who are in contact with each other in the office on the 3rd floor move to a conference room on the 4th floor, even if there is a time zone when the beacon cannot be received in the elevator on the way, the employees will be able to It is highly likely that the contact continued even in the elevator. Therefore, in such a case, the time spent in the elevator is counted as contact time between employees. Therefore, more accurate contact information can be obtained.

In the present invention, the contact history acquisition system 100 corresponds to the "contact history acquisition system", the beacon transmission device 200 corresponds to the "beacon transmission device", the mobile terminal 400 corresponds to the "mobile terminal", and the server 500 The contact history calculator 510 corresponds to the "contact history calculator", and the crowded place calculator 520 corresponds to the "crowded place calculator".

Although one preferred embodiment of the invention is described above, the invention is not so limited. It is understood that various other embodiments can be made without departing from the spirit and scope of the invention. Furthermore, in this embodiment, the actions and effects of the configuration of the present invention are described, but these actions and effects are examples and do not limit the present invention.

100 contact history acquisition system 200 beacon transmission device 300 administrator terminal 400 mobile terminal 500 server 510 contact history calculation unit 520 crowded location calculation unit 550 display unit B location where radio waves from beacons do not reach

Claims (11)

beacon transmitters installed at multiple locations;
a mobile terminal capable of communicating with the beacon of the beacon transmitting device;
a server that acquires reception information of the beacon from the mobile terminal,
The server has a contact history calculation unit that calculates a contact history of the owner of the mobile terminal from the received information,
The contact history acquisition system, wherein the contact history includes dates and places when the owner contacts other owners. 2. The contact history acquisition system according to claim 1, wherein said contact history further includes contact time and number of contact between said owner and said other owner during a specified period. The server has a crowded place calculation unit that records the congestion status of the place,
3. The contact history acquisition system according to claim 1, wherein said crowded place calculation unit calculates a time transition of congestion status of said place. The contact history calculation unit calculates the moving route of the owner from the received information, and if the moving route and the moving time of the owner and the other owner are the same, the owner and the other owner 4. The contact history acquisition system according to any one of claims 1 to 3, wherein contact is made during said movement. 5. The contact according to any one of claims 1 to 4, wherein the mobile terminal notifies the owner when the owner's contact time with the other owner exceeds a predetermined threshold. History acquisition system. 6. The contact history acquisition system according to any one of claims 1 to 5, wherein said beacon transmitting device is installed on a ceiling, wall, desk or floor of an office. 7. Any one of claims 1 to 6, wherein the beacon transmitting device further comprises a thermometer, a hygrometer and/or a carbon dioxide concentration meter, and notifies the server of the temperature, humidity and/or carbon dioxide concentration of the location. The contact history acquisition system described in the item. 4. The contact history acquisition system according to claim 3, wherein said specified period is from two days before the date on which said owner developed an infectious disease to 14 days after the date of onset. The server has a crowded place calculation unit that records the congestion status of the place,
3. The contact history acquisition system according to claim 1, wherein a crowded place is displayed on a display unit of said server or a display unit of said portable terminal. In the contact history acquisition system according to claim 1,
a beacon reception process for receiving the beacon from the beacon transmitting device;
a reception information transmission process for transmitting the reception information to the server. In the contact history acquisition system according to claim 1,
Reception information acquisition processing for acquiring reception information of the beacon from the mobile terminal;
a contact history calculation process for calculating a contact history of the owner of the mobile terminal from the received information.

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