JP4259299B2 - Guidance system and guidance method - Google Patents

Description

  The present invention relates to a system and method for guiding a person to be guided when an abnormality (for example, fire, water damage, traffic jam, traffic closure, gas leakage, earthquake, etc.) occurs in a building or an open space. The present invention relates to a system and method for causing a guider to reach a destination (guidance destination) without going through a specific place (abnormality occurrence position).

  As a conventional technique, in Patent Document 1, when a person's occupancy is detected and an evacuation signal is input while the person is occupying the room, audio data indicating evacuation guidance is read from the audio data memory and supplied to the audio generation means. Evacuation guidance is performed, map data indicating the evacuation guidance is read from the map data memory, supplied to the display device, the surrounding situation and the evacuation direction are displayed, and the evacuation guidance is displayed in text. Therefore, it is described that the evacuees accurately grasp the evacuation route.

  Further, in Patent Document 2, risk detection means for detecting danger information related to entrance / exit passage that occurs at the time of a disaster, storage means for storing an optimum evacuation entrance and other evacuable entrance / exit at the time of a disaster, and risk information The safety of the optimum evacuation entrance is judged, and when the optimum evacuation entrance is dangerous, the control means to select the safe entrance from other entrances and the optimum evacuation entrance are displayed normally and the optimum evacuation It is described that it is provided with a guide light provided on the front surface with a display means for changing and displaying in the direction of another safe doorway when the doorway is dangerous. Further, in Patent Document 2, when a disaster occurs, the display unit displays a normal display in a reduced size in the liquid crystal panel, and the location of the danger detection unit that detects the danger information in the vacant space, in this case the north stairs and the disaster If the risk information such as the type, in this case a fire, etc. is displayed, and the optimum evacuation entrance is judged to be dangerous, only the danger information is displayed. It is described that when the doorway is selected, the direction of the arrow indicating the evacuation direction is changed and displayed in the direction of the selected doorway.

Japanese Patent Laid-Open No. 7-146986

Japanese Patent Laid-Open No. 2001-1000067

  However, Patent Documents 1 and 2 do not describe a rule for an evacuee to guide to an appropriate evacuation exit without passing through a disaster occurrence position and a method for calculating an evacuation route.

  In addition, since the number of people varies depending on the location, there is a possibility that evacuation guidance cannot be performed safely and efficiently if evacuees concentrate at a specific evacuation port even though there are a plurality of evacuation ports. However, this point is not considered in Patent Documents 1 and 2.

  In Patent Literature 1, a map around a place where an entry / exit management card switch device written in a ROM is installed, a current position in the map, a guidance direction when evacuating, and guidance guidance are displayed on a display device. Therefore, the display content displayed on the display device is fixed, and no consideration is given to changing the display content according to the disaster location. Moreover, in patent document 1, it is not assumed performing guidance guidance using the some display apparatus installed in the channel | path.

  On the other hand, in Patent Document 2, the direction of the arrow indicating the evacuation direction displayed on the display unit is changed depending on whether the optimum evacuation entrance is safe or dangerous, but is displayed on the display unit depending on the location of the fire. No consideration is given to changing the direction of the arrow indicating the evacuation direction.

  The objective of this invention is providing the system and method which can guide | guide a to-be-guided person safely by changing the display content of a display according to an abnormality occurrence position.

  An object of the present invention is to provide a system and method capable of safely guiding a guided person by suppressing concentration of the guided person in a part of the guiding paths and the destination.

  A computer (for example, server) is based on an abnormality occurrence position (for example, disaster occurrence position), a map of a passage in the storage device, positions of a plurality of displays installed in the passage, and a position of a guidance destination (for example, an exit) Thus, the guidance direction from each display to the guidance destination is calculated, information on the guidance direction is transmitted to each display, and each display displays the guidance direction according to the information on the guidance direction.

  According to the present invention, the guided person can be safely guided by changing the display content of the display according to the abnormality occurrence position.

  According to the present invention, by calculating the guide route according to the number of guideees in the vicinity of each display, it is possible to suppress the concentration of the guideee in some guide passages and guide destinations, and safely Guided person can be guided.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  In this embodiment, when a disaster occurs in a building such as a department store or a station, an appropriate evacuation route is calculated based on the position of the refugee at the time of the disaster, the position of the evacuation exit, and the position of the disaster occurrence, and An example of an evacuation guidance system that displays an appropriate evacuation direction from among a plurality of evacuation exits, for example, with an arrow so as not to concentrate the flow amount of a person at a specific evacuation exit is used. However, the technical idea of the present invention is not limited to this example.

  FIG. 1 is a diagram showing an evacuation guidance system according to an embodiment of the present invention. In FIG. 1, only one floor is shown as a plan layout, but a building having a plurality of floors may be used.

  The system of the present invention includes a plurality of displays 2a to 2h installed in a passage, a server 1 that controls display of each display, and a plurality of disaster detection sensors 3 installed in a notification. The server 1 transmits / receives data (including control data and display data) to / from each display. When the disaster detection sensor 3 detects the occurrence of a disaster, the disaster detection sensor 3 detects a disaster occurrence position. And disaster detection function 12 (arithmetic processing device) for acquiring information on disaster types (fire, gas leak, earthquake, etc.), display calculation function 13 for calculating the evacuation direction and the evacuation distance from the evacuation exit displayed on each display Arithmetic processing device), position information of each disaster detection sensor 3, position information of each display, position information of an evacuation exit, data indicating the structure of a passage in a building, etc. . The disaster detection sensor 3 is preferably installed in the passage, but may be provided in each display. The displays 2a to 2h are a transmission / reception function 21 (transmission / reception device) for transmitting / receiving data between the server 1 or the displays 2a to 2h, a human sensor function 22 for detecting a person who has passed through the vicinity of the display, the server 1 or another display. It comprises a display function 23 (display device) that displays data transmitted from. The displays 2a to 2h preferably include an arithmetic processing device. It is assumed that the human sensor function 22 includes a function capable of counting the number of persons who have passed near the display, such as using an infrared sensor or a camera to identify a person. The number of people may be counted by photographing a person with a camera and processing the photographed image with each display or server 1. Alternatively, the human sensor function 22 may be a device that can count the number of persons by receiving radio waves transmitted from an information device or an IC tag owned by a person who has passed near the display. The human sensor function 22 may be always ON when the display is ON, or may be ON only when a disaster occurs (OFF state is normal when no disaster occurs). . The display function 23 may include a display device such as a liquid crystal display or a plasma display, or a device that projects an image on a wall, floor, or ceiling using a projection device. In addition, the display can be hung on the wall or embedded in the floor, and the server and display have fire resistance, water resistance, earthquake resistance, etc. to reduce the impact on the function of the server and display due to the disaster. It is also possible. The human sensor function 22 is preferably provided in each display, but may be installed in the passage. The communication network 5 is a communication network constructed in a wireless or wired manner. Each display may be a communication system that directly transmits / receives data to / from the server, or may be a communication system that indirectly transmits / receives data to / from the server via a plurality of displays by transmitting / receiving data between the displays.

The data managed in the storage function 14 of the server 1 is at least the following five types.
(1) Position information of the disaster detection sensor (2) Position information of the display (3) Position information of the evacuation exit and the allowable number of evacuation exits (for example, the maximum number of people who can pass)
(4) Data indicating the structure of the passage inside the building (5) Calculation results of the evacuation distance and evacuation direction from the display to each evacuation exit for each of the displays 2a to 2h Hereinafter, the data (1) to (5) will be described. To do. The position data described below is held as, for example, three-dimensional coordinate data from a plan layout view and an elevation layout diagram of a building.
(1) The location information of the disaster detection sensor is composed of a number for uniquely identifying each disaster detection sensor 3 and the location data of the disaster detection sensor (coordinates on the map or area on the map). The
(2) Display position information includes (1) a number that uniquely identifies a display and position data (coordinates on the map or areas on the map), similar to the position information of each disaster detection sensor 3 described above. Consists of
(3) The location information of the evacuation exit includes the number for uniquely identifying the evacuation exit and the location data of the evacuation exit (coordinates on the map or area on the map), similar to the location information of the (1) disaster detection sensor. ).
(4) Data indicating the structure of the passage inside the building is composed of a collection of passage data,
Each passage data is composed of a number for uniquely identifying the passage, a pair of three-dimensional coordinate data indicating both ends of the passage, and a set of passage intersection data indicating how to intersect with other passages. The passage intersection data is composed of a pair of a number for identifying another passage that intersects with the passage and position data (coordinates on the map or areas on the map) indicating locations where the passages intersect each other.
(5) About each display The calculation result of the evacuation distance and the evacuation direction from the display to each evacuation exit is a result calculated by the display calculation function 13 of the server 1 when a disaster occurs, and data for holding the calculation result It is. Details will be described in the description of the processing flow in the display calculation function 13.

  FIG. 2 is a diagram showing an outline of a processing flow for calculating the evacuation direction displayed on each display when a disaster occurs in the display calculation function 13 of the server 1. In FIG. 2, when a disaster occurs, the evacuation route with the shortest evacuation distance is temporarily selected from the evacuation routes that can reach the evacuation exit without going through the disaster occurrence location from each display. In the case where the evacuation centers are concentrated, a method is shown in which the evacuation exit is determined for a person whose total number of people passing the same evacuation exit is smaller than the evacuation route to the evacuation exit with the next shortest evacuation distance. Regarding the method for determining whether people are concentrated at a specific blame exit and the method for determining the escape exit, first, the first candidate escape exit is the shortest exit from each display, and then the escape exit is the shortest distance away. Is calculated as the second candidate evacuation exit, and the total number of people passing from the display to the first candidate evacuation exit is calculated. If the exit is determined as an evacuation exit and the total number of people passing exceeds the maximum number of people who can pass through the evacuation exit, calculate the total number of people passing from the display to the second candidate evacuation exit, Decide as an evacuation exit. For the display closest to the evacuation port, for example, the evacuation port 4b in FIG. In addition, when there are a plurality of evacuation routes toward the same evacuation port, the total number of people passing through each of the display 2d and the display 2f is calculated in the display closest to the evacuation port in each evacuation route, for example, the evacuation port 4a in FIG. Then, the total number of passing persons may be added to the total number of passing persons. Furthermore, based on the total number of people passing through each display, the distance from each display to the evacuation exit, and the speed of the refugee (for example, 3 to 5 km per hour), the number of people concentrated at the evacuation exit after a predetermined period of time is predicted. Also good. In addition, instead of or together with the allowable number of evacuation exits, the allowable number of persons in each passage (a passage obtained by dividing all passages inside the building) may be used.

  Details of the processing flow of FIG. 2 will be described below.

  In step 901, the disaster detection function 12 acquires the information of the disaster detection sensor 3 that has detected the disaster, searches the location information of the disaster detection sensor managed by the storage function 14, and the location information of the corresponding disaster detection sensor. To get. Further, in synchronization with the detection of the occurrence of the disaster, the server 1 requests each display to obtain the number of people passing near the display. Each display uses the human sensor function 22 to obtain the number of people passing near the display. Send to.

  In step 902, if the processing of step 903 shown below is not performed for all displays, the process proceeds to step 903, and if performed for all displays, the process proceeds to step 911.

  In step 903, one display that has not been subjected to this step is selected, and the display position information managed by the storage function 14 is searched for the display, and the position information of the display is acquired.

  In step 904, for the display selected in step 903, if the processing in step 905 shown below is not performed for all evacuation exits, the process proceeds to step 905, and if it is performed for all evacuation exits, the process proceeds to step 907. Transition.

  In step 905, for the display selected in step 903, one evacuation exit that has not yet performed this step is selected, and the location information of the evacuation exit managed by the storage function 14 is searched for the evacuation exit, Acquire location information of the evacuation exit.

  In step 906, the position information on the display selected in step 903 and the position of the evacuation exit selected in step 905 and the position information on the occurrence of the disaster acquired in step 901 are used to pass the disaster occurrence position from the display. The evacuation route that reaches the evacuation exit is calculated. The calculation method of the evacuation route is, for example, using a route search algorithm with a start point as the position of the display and an end point as the position of the evacuation exit, and excluding a route that passes through the disaster occurrence position. By calculating the route and the route up to, it is possible to acquire the evacuation distance and evacuation direction of the route that reaches the evacuation exit without passing through the disaster occurrence position on the display. This calculation result is held in the storage function 14 as a set of sets including a number for identifying a display, a number for identifying an evacuation exit, an evacuation distance, and an evacuation direction. In this calculation, there may be a plurality of evacuation routes that reach the evacuation exit from the display, and the evacuation direction or evacuation distance may be the same.

  In step 907, for the display selected in step 903, evacuation routes for all evacuation exits that can evacuate from the display without passing through the disaster occurrence position are calculated, and are managed in the storage function 14. Using the calculation results, search for a set that is the shortest evacuation distance from the display (number for identifying the display, number for identifying the evacuation exit, evacuation distance, evacuation direction), and the obtained set is the first Search in the storage function 14 as a candidate evacuation port, and search for a pair (number identifying the display, number identifying the evacuation port, evacuation distance, evacuation direction) that is the second shortest evacuation distance from the display, The acquired set is held in the storage function 14 as a second candidate evacuation exit.

  In step 911, for each display, the processing from step 912 onward is executed in order from the shortest distance to the first candidate evacuation exit of the display processed in step 907.

  In step 912, if the processing in step 913 and subsequent steps shown below is not performed for all displays, the process proceeds to step 913, and if performed for all displays, the process proceeds to step 918.

In step 913, the total number of people passing from the display to the first candidate evacuation exit is calculated. For example, in FIG. 1, when the first candidate evacuation port of the display 2d, the display 2c, and the display 2e is the evacuation port 4a, and the distance to the evacuation port 4a is short in the order of the display 2d, the display 2c, and the display 2e,
The total number of people passing from the display 2d to the first candidate evacuation port 4a is the number of people passing through the display 2d acquired in step 901. The total number of people passing from the display 2c to the first candidate evacuation port 4a is The total number of people passing through the display 2c and the number of people passing through the display 2d acquired in step 901. The total number of people passing from the display 2e toward the first candidate evacuation port 4a is the number of people passing through the display 2e acquired in step 901. The total number of passing people, the passing number of the display 2c, and the passing number of the display 2d.

In step 914, the maximum number of people who can pass through the evacuation exit managed by the storage function 14 of the server 1 is acquired, and the total number of people who can pass through the evacuation exit is less than or equal to the maximum number of people who can pass through the evacuation exit. If the total number of people passing is less than or equal to the maximum number of people who can pass, the process proceeds to step 915,
Otherwise, the process proceeds to step 916.

  In step 915, since the total number of people passing from the display to the first candidate evacuation port of the display is less than the maximum number of people who can pass through the first candidate evacuation port, evacuation guidance is performed in the direction of the first candidate evacuation port. However, it is determined that the flow of people does not concentrate at the first candidate evacuation port, and the first candidate evacuation port is determined as the evacuation port of the display.

In step 916, since the total number of people passing from the display to the first candidate evacuation port of the display exceeds the maximum number of people who can pass through the first candidate evacuation port,
When evacuation guidance is performed in the direction of the first candidate evacuation exit, it is determined that there is a possibility that the flow of people may concentrate on the first candidate evacuation exit, and in step 907, the display of the display managed by the storage function 14 is determined. Obtain two candidate evacuation exits and calculate the total number of people passing through the display toward the second candidate evacuation exit. For example, in FIG. 1, the total number of people passing from the display 2e toward the first candidate evacuation port 4a exceeds the maximum number of people who can pass through the evacuation port 4a. In step 907, the second candidate evacuation port on the display 2e is stored as the evacuation port 4b. When managed by the function 14, the total number of people passing from the display 2e toward the second candidate evacuation port 4b is calculated. At this time, the first candidate evacuation port of the display 2h is the evacuation port 4b, the second candidate evacuation port of the display 2e is the evacuation port 4b, and the distance to the evacuation port 4b is short in the order of the display 2h and the display 2e. The total number of people passing from the display 2e toward the second candidate evacuation port 4b is the total number of people passing through the display 2h and the number of people passing through the display 2e acquired in step 901.

In step 917, for the display, the total number of people passing to the first candidate evacuation exit calculated in step 913 and the total number of people passing to the second candidate evacuation exit calculated in step 916 are compared. It is determined that the person who evacuates in the direction of the evacuation exit with a small number of passing persons is less likely to concentrate the flow of people, and the person with the smaller total number of passing persons is determined as the evacuation exit of the display.
For example, if it is determined in step 914 that the total number of people passing the first candidate evacuation port 4a on the display 2e in FIG. The total number of people passing to one candidate evacuation port 4a is calculated, and in this step, the total number of people passing to the first candidate evacuation port 4a on the display 2e and the total number of people passing to the first candidate evacuation port 4b are calculated. In comparison, the evacuation port having the smaller total number of passing people is determined as the evacuation port of the display 2e.

  In step 918, it is determined in step 912 that evacuation exits have been determined for all the displays, and display data for guiding to the determined evacuation exit is transmitted to each display by the transmission / reception function 11 of the server 1. The display data is, for example, image information and character information indicating the direction to the evacuation exit, voice data for guiding the refugee to the evacuation exit, and the like.

In the following, the above processing flow is supplemented.
(1) In the above embodiment, an example in which a disaster occurs in one place is used. However, when a disaster occurs in a plurality of places, in step 906, the display selected in step 903 and in step 905 are selected. The evacuation route that reaches the evacuation exit from the display without passing through the plurality of disaster occurrence locations using the location information of the evacuation exit that has been obtained and the location information of the occurrence of the disaster obtained in step 901. calculate.
(2) When a disaster such as a fire is affected by the wind direction,
By adding a function to detect the wind direction to the displays 2a to 2h, and weighting the data indicating the structure of the passage inside the building in consideration of the wind direction,
It is possible to determine an evacuation route that reduces the influence of the wind direction. That is, when a disaster occurs, in step 901, information such as disaster detection and wind direction is acquired from the disaster detection sensor 3, and in step 906, the evacuation route toward the wind direction is weighted, and the display selected in step 903 is displayed. And using the position information of the evacuation exit selected in step 905 and the position information of the disaster occurrence acquired in step 901, the display reaches the evacuation exit without passing through the disaster occurrence position from the display, and the weight is Calculate the evacuation route so that it becomes smaller.
(3) An uninterruptible power supply or a rechargeable built-in battery in the server 1 or the displays 2a to 2h in preparation for the case where the power supply to the server or the display is temporarily cut off or completely stopped due to the influence of a disaster. Can be displayed on the display even during a power failure.
(4) In the event that a failure occurs in the communication path connecting the server 1 and the displays 2a to 2h due to the influence of the disaster, and the connection of the communication path is temporarily or completely disconnected, each display has a display function 23. Data to be temporarily displayed is calculated and held in advance, and when it is determined that a connection cannot be established in communication with the server 1, the temporary display data is displayed on the display. The temporarily displayed data contents indicate the evacuation direction fixed and assigned in advance based only on the position of the display and the position of the evacuation exit. When the connection is restored in the communication between each display and the server 1, the display content on the display is switched from the temporary display data to the evacuation direction or evacuation guidance message calculated in the processing flow of FIG.
(5) If the evacuation direction calculated in the processing flow of FIG. 2 is different from the evacuation direction or display contents of the evacuation guide light permanently installed in the building, the evacuation direction or evacuation guidance message displayed on the display By using video or audio to notify the evacuees that they can evacuate more safely and swiftly by evacuating according to the above, take measures to prevent the evacuees from being confused. Alternatively, the display contents of the permanent evacuation guide light can be linked with the display contents of the display so that the display contents are matched so as not to confuse the evacuees.

By the above method, it is possible to appropriately control the amount of human flow and perform evacuation guidance so that people are distributed to a plurality of evacuation ports. In this embodiment, two evacuation exits from each display, that is, the evacuation exit with the shortest distance and the evacuation exit with the next shortest distance are compared. By performing the comparison, it is possible to further control the flow of people. Further, in this embodiment, the number of people who passed near each display at the time of disaster occurrence is counted, and the server calculates the evacuation direction to be displayed on each display using the information.
The server counts the number of people passing through the vicinity of each display at regular intervals or at appropriate intervals according to the calming situation of the disaster and the evacuation situation of the evacuees, and the server determines the evacuation direction displayed on each display. It is possible to recalculate each time, and even with the same display, the evacuation direction information indicating the evacuation route and the evacuation guidance information such as the evacuation guidance message can be changed with time. As a result, the evacuation guidance information changes according to the elapsed time since the disaster occurred.

  According to the present invention, at the time of occurrence of an abnormality, for each display, a guide route candidate for a guided person in the vicinity of the display to reach each guidance destination without passing through the abnormality occurrence position is calculated. Since the guide destination and the guide route with a relatively short distance are determined among the candidates, the guide information is displayed on the display based on the position of the display installed in the passage, the position of the guide destination, and the position where the abnormality occurred. Is possible.

  Furthermore, according to the present invention, when the flow of the person being guided concentrates on a specific destination, other guide destinations and guide routes (for example, guide to the guide destination) among the guide destination and guide route candidates. By determining the next shortest guide route) as an alternative guide destination and guide route, it is possible to appropriately control the amount of human flow so that people can evacuate in multiple evacuation openings. In addition, it is possible to display the evacuation guidance information on the display.

  INDUSTRIAL APPLICABILITY The present invention can be used to safely guide a guided person to an evacuation exit when a fire occurs in a station.

It is a figure which shows the evacuation guidance system of embodiment of this invention. It is a figure which shows the outline | summary of the processing flow which calculates the evacuation direction displayed on a display in embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Server 2a-2h Display 3 Disaster detection sensor 4a, 4b Escape exit 5 Communication network 11 Transmission / reception function 12 Disaster detection function 13 Display calculation function 14 Storage function 21 Transmission / reception function 22 Human sensor function 23 Display function

Claims (10)

A plurality of displays installed in the passage, a computer that controls display of the display, a map of the passage, a position of each display on the map of the passage, and a position of a guide destination on the map of the passage are stored. In a guidance system with a storage device,
When the abnormality occurs, the computer guides from each display to the guidance destination based on the abnormality occurrence position, the map of the passage in the storage device, the position of each display, and the position of the guidance destination. Calculating the direction, sending information on the guidance direction to each display,
If each display can establish a connection with the computer, it displays a guidance direction according to the guidance direction information transmitted from the computer, and if it cannot establish a connection with the computer, each display And a guidance direction calculated in advance based on the position of the guidance destination and the position of the guidance destination .   The calculator calculates one or a plurality of guide route candidates such that a guided person in the vicinity of each display can reach the guide destination while avoiding the abnormality occurrence position, and the calculated 1 or An optimum guidance route having a relatively short guidance distance from each display to the guidance destination is selected from a plurality of guidance route candidates, and the guidance direction of each display is selected based on the selected optimum guidance route. The guidance system according to claim 1, wherein:   The computer selects a plurality of optimum guidance routes having a relatively short guidance distance from each display to the guidance destination among the plurality of guidance route candidates, and for each optimum guidance route to the guidance destination Calculating the number of guided persons, selecting an optimal guiding path with a relatively short number of guided persons to the destination, and determining the guiding direction of each display based on the selected optimal guiding path The guidance system according to claim 2, wherein the guidance system is calculated.   When the computer determines that the number of guided persons who have passed near the respective displays is concentrated on the optimum guide route, the computer selects another one of the one or more guide route candidates excluding the optimum guide route. The guidance system according to claim 1, wherein an evacuation route is selected, and the guidance direction of each display is calculated based on the other guidance route instead of the optimum guidance route.   The guidance system according to claim 4, wherein the display includes a guided person sensor for detecting the number of the guided persons in the vicinity of the display. The storage device stores an allowable number of the guidance destinations,
The calculator determines whether the number of guided persons passing near each display depends on whether or not the number of guided persons passing near each display exceeds the allowable number of the guiding destination in the storage device. 5. The guidance system according to claim 4, wherein it is determined whether or not the information is concentrated on the optimum guidance route.   The guide route from each display to the guide destination is recalculated every time at a predetermined time interval or at an appropriate interval according to the calming state of the abnormality or the guide state of the guided person. The guidance system according to any one of claims 1 and 2. In a guidance method for guiding a person to be guided using a plurality of displays installed in a passage when an abnormality occurs,
The storage device stores the map of the passage, the position of each display on the map of the passage, and the position of the guidance destination on the map of the passage,
The computer calculates a guide direction from each of the displays to the guide destination based on the abnormality occurrence position, the map of the passage in the storage device, the position of each display, and the position of the guide destination, Send information on the direction of guidance to each display,
When each display can establish a connection with the computer, it displays a guidance direction according to the guidance direction information transmitted from the computer, and when it cannot establish a connection with the computer, each display And a guidance direction calculated in advance based on the position of the guidance destination and the position of the guidance destination . When the connection with the computer is restored in a state where the display cannot establish a connection with the computer, the guidance direction is changed from the predetermined guidance direction according to the guidance direction information transmitted from the computer. 2. The guidance system according to claim 1, wherein display contents are switched. When the connection with the computer is restored in a state where the display cannot establish a connection with the computer, the guidance direction is changed from the predetermined guidance direction according to the guidance direction information transmitted from the computer. The guidance method according to claim 8, wherein display contents are switched.

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