Passenger conveyor and control method of passenger conveyor

Abstract

The invention provides a passenger conveyor and a control method of the passenger conveyor, which can implement proper control corresponding to the conditions of surrounding persons. According to one embodiment, the passenger conveyor is provided, and a plurality of steps which are annularly connected circularly move between an upper ladder way and a lower ladder way. The passenger conveyor includes: a first radar device configured to irradiate a first person approaching an upper ladder way with an electric wave and receive a reflected wave from the first person so as to output first detection information related to the first person; and a control device for controlling the operation of the passenger conveyor on the basis of the first detection information output from the first radar device.

Description

[0001] This application is based on Japanese Patent Application No. 2023-100867 (filing date: June 20, 2023) and claims the priority of the aforementioned application, and the present application incorporates the entire contents of the aforementioned application by reference. Technical Field

[0002] Embodiments of the present invention relate to a passenger conveyor and a control method of a passenger conveyor. Background Art

[0003] In recent years, in order to achieve power saving, for example, an escalator (passenger conveyor) having an automatic operation function configured to automatically start operation when a passenger is detected by a sensor is known.

[0004] In such an automatic operation function, for example, when a person approaching the escalator is detected by the primary sensor, the operation of the escalator (movement of multiple steps) is started; when a person passing through the escalator's entrance and about to board the escalator is detected by the secondary sensor, the speed of the movement of the multiple steps is accelerated to the rated speed (normal speed).

[0005] However, in the automatic operation function using the primary sensor and the secondary sensor, it is sometimes impossible to implement appropriate control according to the situation of people around the escalator. Summary of the invention

[0006] An object of the present invention is to provide a passenger conveyor and a method for controlling the passenger conveyor that can perform appropriate control according to the situation of people in the surrounding area.

[0007] According to an embodiment, a passenger conveyor is provided, which is configured as a plurality of steps connected in a ring shape and cyclically moves between an upper staircase entrance and a lower staircase entrance. The passenger conveyor comprises: a first radar device that irradiates a first person approaching the upper staircase entrance with radio waves and receives a reflected wave from the first person, thereby outputting first detection information related to the first person; and a control device that controls the operation of the passenger conveyor based on the first detection information output from the first radar device. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a diagram showing a schematic configuration example of an escalator according to an embodiment.

[0009] Figure 2 This is an enlarged view showing the vicinity of an escalator entrance.

[0010] Figure 3 This is a block diagram showing an example of the functional configuration of the control device.

[0011] Figure 4 This is a flowchart showing an example of the processing procedure of the control device.

[0012] Figure 5 This is a diagram showing an example of a radar detection range.

[0013] Figure 6 This is a diagram for explaining a configuration in which two radar devices are provided.

[0014] Figure 7 This is a diagram showing an example of a radar detection range when two radar devices are installed.

[0015] Figure 8 This is an enlarged view showing the vicinity of an escalator entrance. DETAILED DESCRIPTION

[0016] Hereinafter, embodiments will be described with reference to the drawings.

[0017] Figure 1 A schematic configuration example of a passenger conveyor according to the present embodiment is shown. In the present embodiment, a case where the passenger conveyor is an escalator is described, but the passenger conveyor may also be a moving walkway or the like.

[0018] like Figure 1 As shown, the escalator 10 is arranged obliquely between the lower floor and the upper floor of a building, for example. Figure 1 In the example shown, it is assumed that the lower floor side is an upper entrance of the escalator 10 and the upper floor side is a lower entrance of the escalator 10 .

[0019] Figure 1 The escalator 10 shown is configured to transport passengers (users) riding on the steps 11 by circulating a plurality of steps (stairs) 11 connected without gaps between a lower machine room 12 (upper staircase entrance) and an upper machine room 13 (lower staircase entrance).

[0020] The plurality of steps 11 are connected by an endless connection chain 14 and are arranged in a truss 15 installed under the floor of a building. A lower sprocket 16 and an upper sprocket 17 are arranged inside the truss 15, and the connection chain 14 is wound between them.

[0021] exist Figure 1 In the example shown, a drive device 18 having a motor, a reducer, etc. is connected to the upper sprocket 17. The drive device 18 rotates the lower sprocket 16 and the upper sprocket 17 on which the connecting chain 14 is wound, and the plurality of steps 11 circulates between the lower machine room 12 and the upper machine room 13 while being guided by a guide rail (not shown) via the connecting chain 14. Figure 1In the embodiment, the drive device 18 is connected to the upper sprocket 17 , but the drive device 18 may be connected to the lower sprocket 16 .

[0022] In addition, a pair of skirtings (not shown) are provided on the upper part of the truss 15 in a manner facing both sides of each step 11 along the moving direction of the step 11. Handrails 19 are respectively provided upright on the upper part of the pair of skirtings. In other words, the handrails 19 are respectively provided upright on both sides of each step 11. A belt-shaped handrail track 20 is installed around the handrail 19. The handrail track 20 is a handrail for passengers riding on the step 11 to hold, and is transmitted, for example, by the driving force of the driving device 18, thereby revolving in synchronization with the movement of the step 11.

[0023] The entrances and exits (up and down stairs) of the escalator 10 are located above the lower machine room 12 and the upper machine room 13, and the entrances and exits are provided with the boarding and descending plates 22 and 23 so as to be removable. The boarding and descending plates 22 and 23 are equivalent to the ceilings of the lower machine room 12 and the upper machine room 13. Passengers walk on the boarding and descending plates 22 when getting on the escalator 10 (stairs 11), and walk on the boarding and descending plates 23 when getting off the escalator 10 (stairs 11).

[0024] In the upper machinery room 13, a control device 21 is provided in addition to the drive device 18. The control device 21 controls the operation of various devices provided in the escalator 10 in order to control the operation of the escalator 10.

[0025] Here, the escalator 10 of the present embodiment has a function of automatically starting the operation when a passenger is detected (hereinafter referred to as an automatic operation function).

[0026] Below, using the above Figure 1 The automatic operation function of the escalator 10 according to the comparative example of the present embodiment will be briefly described.

[0027] For example, when a person approaching the entrance is detected by a primary sensor installed at the entrance, the operation of the escalator 10 is started. When a secondary sensor installed at the handrail track 20 detects that the person has passed the entrance (above the boarding and descending plate 22) and is about to board the steps 11, the moving speed of the multiple steps 11 (the moving speed of the multiple steps 11) is accelerated, thereby realizing the automatic operation function of the comparative example of the present embodiment.

[0028] In the comparative example of the present embodiment, for example, a reflective optical sensor composed of a light projecting element and a light receiving element can be used as a primary sensor, and a transmissive optical sensor composed of a light projecting element and a light receiving element can be used as a secondary sensor.

[0029] According to the automatic operation function of the comparative example of the above-mentioned present embodiment, the operation of the escalator 10 can be stopped when there are no passengers, and the operation of the escalator 10 can be started when a passenger is detected by the primary sensor and the secondary sensor. Therefore, the power consumption of the escalator 10 can be reduced (i.e., power saving is achieved).

[0030] However, in the comparative example of the present embodiment, for example, when a person moves in a manner of crossing the entrance of the escalator 10 (on the boarding and descending board 22), even if the person does not board the escalator 10 (the steps 11), the person is detected by the primary sensor and the operation of the escalator 10 is started. Therefore, in the comparative example of the present embodiment, the effect of reducing the power consumption of the escalator 10 may be reduced.

[0031] Therefore, in this embodiment, if Figure 1 As shown in the figure, a radar device 24 is provided near the entrance of the escalator 10. The radar device 24 of this embodiment is a millimeter wave radar configured to irradiate a person approaching the entrance with an electric wave such as a millimeter wave (radar signal) and receive a reflected wave from the person. Such a radar device 24 can detect (measure) the direction of travel, speed, and position (the distance from the radar device 24 to the person) of the person based on the reflected wave received from the person.

[0032] In the present embodiment, the control device 21 controls the operation of the escalator 10 using the detection result of the radar device 24. In the present embodiment, the primary sensor and the secondary sensor described in the comparative example of the present embodiment are not necessary.

[0033] Figure 2 1 is an enlarged view showing the vicinity of the entrance of the escalator 10 according to the present embodiment. Figure 2 As shown in FIG. 1 , the radar device 24 is installed on, for example, a skirt board 25 near the entrance of the escalator 10. In addition, the radar device 24 may be installed in a space above the boarding and landing platform 22 as long as it can emit radar signals to people near the entrance of the escalator 10 (i.e., the space above the boarding and landing platform 22). Figure 2 Any position other than the skirt plate 25 shown.

[0034] Figure 3 Yes means Figure 1 FIG. 2 is a block diagram showing an example of the functional configuration of the control device 21. Figure 3 As shown, the control device 21 includes an acquisition unit 21a, a determination unit 21b, a calculation unit 21c, and a control unit 21d.

[0035] Here, in the present embodiment, the control device 21 is connected to the radar device 24. As described above, the radar device 24 irradiates a radar signal to a person approaching the entrance of the escalator 10, receives a reflected wave from the person, and outputs detection information related to the person. In addition, the detection information output from the radar device 24 includes, for example, the direction of travel of the person irradiated by the radar signal, the speed of the person (the speed at which the person moves), and the position of the person (the distance from the radar device 24 to the person). As described above, the acquisition unit 21a acquires the detection information output from the radar device 24.

[0036] The determination unit 21b determines whether the person is a passenger (a person intending to board the escalator 10) based on the moving direction of the person included in the detection information acquired by the acquisition unit 21a.

[0037] The calculation unit 21c calculates the time until the person gets on the escalator 10 (step 11) based on the position and speed of the person included in the detection information acquired by the acquisition unit 21a.

[0038] The control unit 21d controls the operation of the escalator 10 based on the determination result of the determination unit 21b and the calculation result of the calculation unit 21c (that is, the detection information output from the radar device 24).

[0039] Next, refer to Figure 4 The flowchart of FIG. 1 illustrates the processing procedure of the control device 21 of the present embodiment.

[0040] First, the radar device 24 operates in a manner of periodically emitting radar signals. For example, when a person (hereinafter referred to as a target person) approaches the entrance of the escalator 10 and a reflected wave of the radar signal from the target person is received, the presence of the target person is detected and the detection information related to the target person is output to the control device 21.

[0041] In addition, the radar device 24 can measure the distance from the radar device 24 to the target person (i.e., the position of the target person relative to the radar device 24) based on, for example, the time from when the radar signal is irradiated to when the reflected wave from the target person is received. In the radar device 24, the moving direction and speed of the target person can be further measured based on the change in the position of the target person measured in this way. Thus, the radar device 24 can output detection information including the moving direction, speed, and position of the target person.

[0042] As described above, the acquisition unit 21 a included in the control device 21 acquires the detection information output from the radar device 21 (step S1 ).

[0043] The distance determination unit 21 b determines whether the target person is a passenger based on the moving direction of the target person included in the detection information acquired in step S1 (step S2 ).

[0044] Here, refer to Figure 5 The process of step S2 (process of determining whether the target person is a passenger) will be described. Figure 5 An example of the irradiation range (ie, radar detection range) of the radar signal of the radar device 24 is shown in FIG. Figure 5 is prepared to explain the processing of step S2. Figure 5 In the figure, the skirt plate, the radar device 24 disposed below the handrail rail 20, and the like are omitted.

[0045] As described above, in the present embodiment, when a target person enters the radar detection range 24 a , detection information on the target person is output from the radar device 24 , and the detection information is acquired in step S1 .

[0046] Thus, the detection information obtained in step S1 includes the moving direction of the target person. Figure 5 The arrows 241 to 245 in Graph 24A and 24B respectively indicate the moving directions of the target person. The moving directions of the target person included in the detection information are expressed based on, for example, two coordinate points in a three-dimensional space defined by the radar device 24 .

[0047] In this embodiment, for example, when the moving direction of the target person is Figure 5 If the target person is in the direction of arrows 241 to 243 shown, it is determined in step S2 that the target person is a passenger.

[0048] That is, in step S2 , for example, when the moving direction of the target person is toward the steps 11 (that is, the extension line of the moving direction of the target person passes between the pair of handrails 20 ), it is determined that the target person is a passenger.

[0049] On the other hand, for example, when the direction of movement of the target person is Figure 5 If the target person is in the direction of arrows 244 and 245 shown, it is determined in step S2 that the target person is not a passenger.

[0050] That is, in step S2, for example, when the target person's moving direction is not toward the steps 11 (ie, the extension line of the target person's moving direction does not pass between the pair of handrails 20), it is determined that the target person is not a passenger.

[0051] In addition, as described above, the detection information obtained in step S1 includes the speed and position of the target person in addition to the direction of travel of the target person, but the speed and position of the target person can be further considered to perform the process of determining whether the target person is a passenger in step S2. Specifically, even in the case where the direction of travel of the target person is toward the steps 11, for example, when the speed of the target person is extremely low (i.e., so low that it is presumed that there is no intention to board the escalator 10), it can be determined that the target person is not a passenger, and when the position of the target person is not within a predetermined area (i.e., because it is located at a relatively far distance from the upper staircase, it is unclear whether there is an intention to board the escalator 10), it can be determined that the target person is not a passenger.

[0052] When it is determined that the target person is a passenger ("Yes" in step S2), the control unit 21d starts the operation of the escalator 10 (step S3).

[0053] When the process of step S3 is executed, the calculation unit 21c calculates the time until the target person gets on the escalator (the arrival time to the step 11) based on the speed and position of the target person included in the detection information obtained in step S1 (step S4). In addition, if the position of the target person included in the detection information is represented by, for example, a coordinate point in a three-dimensional space specified by the radar device 24, the calculation unit 21c can calculate the distance from the target person to the step 11 based on the position of the target person and, for example, the position (coordinate point) of the boundary between the boarding and landing board 22 and the step 11 that is retained in advance. The calculation unit 21c can calculate the arrival time to the step 11 using the speed of the target person and the distance from the target person to the step 11 calculated in this way.

[0054] When the process of step S4 is executed, the control unit 21d controls the operation of the escalator 10 based on the arrival time calculated in step S4 so as to accelerate the moving speed of the plurality of steps 11 to the rated speed (step S5). Specifically, the control unit 21d implements the control to make the moving speed of the plurality of steps 11 reach the rated speed at the timing when the target person gets on the steps (i.e., after the arrival time).

[0055] In addition, Figure 4 The case of automatically starting the operation of the escalator 10 is described in the above description, but in the automatic operation function, the operation of the escalator 10 needs to be automatically stopped. Therefore, the control device 21 (control unit 21d) stops the operation of the escalator 10 when, for example, a light sensor provided at the exit of the escalator 10 detects that a passenger has left the escalator 10 (step 11). At this time, the escalator 10 may be detected when the passenger is leaving the escalator, and the escalator may be decelerated and stopped after a certain period of time. That is, each time a person is detected by the radar device 24, the above-mentioned operation is executed. Figure 4 When a plurality of persons are detected and the operation is controlled, if it can be confirmed that the number of passengers getting on and the number of passengers getting off are the same, the operation of the escalator 10 may be stopped.

[0056] As described above, in the present embodiment, a radar device 24 is provided, and the radar device 24 irradiates a radio wave (radar signal) such as a millimeter wave to a person (first person) approaching the entrance of the escalator 10 (passenger conveyor), and receives a reflected wave from the person, thereby outputting detection information (first detection information) related to the person, and the control device 21 controls the operation of the escalator 10 based on the detection information output from the radar device 24. In the present embodiment, by such a configuration, appropriate control corresponding to the conditions of the surrounding people can be implemented.

[0057] Specifically, in the present embodiment, it is determined whether the person is a passenger (a person who intends to board the escalator 10) based on the moving direction of the person included in the detection information output from the radar device 24, and the operation of the escalator is started when it is determined that the person is a passenger. In the present embodiment, by such a configuration, for example, it is possible to avoid starting the operation of the escalator 10 due to a person (i.e., a person who does not intend to board the escalator 10) crossing the entrance of the escalator 10 (above the boarding and landing board 22), thereby reducing the power consumption of the escalator 10 in automatic operation.

[0058] Furthermore, in the present embodiment, the time until the person gets on the escalator 10 (arrival time at the steps 11) is calculated based on the speed (moving speed) and position of the person included in the detection information output from the radar device 24, and the moving speed of the plurality of steps 11 is accelerated to the rated speed based on the calculated time. In the present embodiment, by such a configuration, passengers can smoothly get on the escalator 10 (steps 11) even in the case of automatic operation.

[0059] In addition, in the present embodiment, when the person is determined to be a passenger based on the direction of travel of the person included in the detection information output from the radar device 24, and the operation of the escalator 10 is started (i.e., the start of the escalator 10 is controlled based on the detection information), the power consumption of the escalator 10 can be reduced (energy saving can be achieved), and therefore, the process of calculating the arrival time to the above-mentioned step 11 can also be omitted.

[0060] Here, in this embodiment, as described above Figure 2 In the above description, a case where one radar device 24 is provided is described, but the present embodiment may also be configured as follows, for example. Figure 6As shown in FIG. 2 , two radar devices 24 are provided. In this way, as long as two radar devices 24 are provided, Figure 5 The radar detection range 24a shown is extended to Figure 7 Radar detection ranges 24a and 24b are shown.

[0061] In addition, in the present embodiment, a case is described in which the operation (start-up) of the escalator 10 is controlled based on the detection information output from the radar device 24, mainly from the viewpoint of reducing the power consumption of the escalator 10. However, the present embodiment may also be a configuration in which the operation of the escalator 10 is controlled from the viewpoint of improving the safety of passengers, for example.

[0062] Specifically, for example, when the speed of a person included in the detection information output from the radar device 24 (the speed of a person determined to be a passenger) is lower than a predetermined speed, it can be inferred that the person is an elderly person or a person with mobility problems, and the moving speed of the plurality of steps 11 (the operating speed of the escalator 10) can be slowed down. Thus, in this embodiment, the moving speed of the plurality of steps 11 can be controlled based on the speed of the person included in the detection information output from the radar device 24, thereby improving the safety of passengers.

[0063] Furthermore, for example, by executing the above Figure 4 The operation of the escalator 10 is started by the processing shown in the figure. In a situation where a plurality of passengers successively board the escalator 10 (step 11), if it can be considered that a plurality of passengers (persons determined to be passengers) are queuing at the entrance of the escalator 10 based on the moving direction and speed of the person included in the detection information output from the radar device 24, the stagnation of passengers at the entrance can be detected. In this case, the control device 21 (control unit 21d) can also output a sound notifying the stagnation at the entrance of the escalator 10 from a speaker (not shown) provided in the escalator 10, for example, to guide the passengers to board the escalator 10 (step 11) in two rows (i.e., board the escalator in two rows).

[0064] In addition, in this embodiment, Figure 1 as well as Figure 2 Although the case where the radar device 24 (first radar device) is provided near the entrance of the escalator 10 as shown in FIG. Figure 8 As shown in FIG. 1 , a radar device 26 (second radar device) is installed near the exit of the escalator 10. Figure 8 It is assumed that one radar device 26 is installed near the lower entrance of the escalator 10. However, in order to expand the radar detection range of the lower entrance of the escalator 10, more than two radar devices 26 may be installed near the lower entrance.

[0065] In this case, the radar device 26 irradiates a radio wave (radar signal) such as a millimeter wave to a person (second person) approaching the lower entrance of the escalator 10, and receives a reflected wave from the person, thereby being able to output detection information (second detection information) related to the person. Accordingly, the control device 21 (control unit 21d) can detect a person who wants to board the escalator 10 from the lower entrance of the escalator 10 (i.e., a passenger from a direction different from the direction of operation of the escalator 10) based on the direction of travel of the person included in the detection information output from the radar device 26. In this case, the control device 21 can also be configured to output a sound from a speaker notifying that the escalator 10 cannot be boarded from the lower entrance (i.e., the intention of prohibiting boarding is guided by automatic broadcasting).

[0066] Furthermore, at the exit of the escalator 10, if, for example, a child's hand is caught in the entrance 27 (entrance to the handrail track 20) ​​provided at the skirt board 25, it is dangerous. Figure 8 As shown, a radar device 26 that outputs detection information related to a person approaching the lower staircase of the escalator 10 is provided near the entrance 27, and when the difference between the position included in the detection information and the position of the entrance 27 is less than a threshold value (i.e., when a person such as a child is significantly close to the entrance 27), the control device 21 (control unit 21d) may also output an alarm (for example, sound a warning buzzer). Here, the entrance 27 provided at the lower staircase is described, but an alarm may also be output in the same manner when a person approaches the entrance provided at the upper staircase.

[0067] Furthermore, the radar device 26 can output detection information related to a person who has moved away from the lower entrance of the escalator 10 after descending from the plurality of steps 11. Accordingly, the control device 21 (control unit 21d) detects that a plurality of passengers are stranded at the lower entrance of the escalator 10 based on the speed of the person included in the detection information output from the radar device 26, and takes action to slow down the moving speed of the plurality of steps 11, or gradually reduce the moving speed of the plurality of steps 11 to completely stop the operation of the escalator 10 (i.e., controls the moving speed of the plurality of steps 11 based on the speed of the person included in the detection information output from the radar device 26).

[0068] In addition, the radar device 26 installed at the exit of the escalator 10 (the detection information output from the radar device 26) can also be used to automatically stop the operation of the escalator 10 during automatic operation (i.e., detect that a passenger has come down from the escalator 10).

[0069] In addition, in the present embodiment, a case where the lower side is the entrance of the escalator 10 and the upper side is the exit of the escalator 10 is described, but the escalator 10 can change the moving direction of the plurality of steps 11, for example, by installing radar devices on both sides near the entrance of the escalator. As described above, appropriate responses can be given to the case where the moving direction of the plurality of steps 11 is changed.

[0070] Furthermore, in the present embodiment, the case where the radar device is installed near the entrance of the escalator 10 is described, but the radar device may be installed at a position other than the entrance of the escalator 10. Specifically, for example, if the radar device is installed at a position where a radar signal can be irradiated to a passenger (including a passenger's space) riding on the steps 11, it is possible to detect a dangerous situation where the passenger (for example, a child, etc.) sticks out of the handrail track 20.

[0071] Several embodiments of the present invention have been described, and these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other ways, and various omissions, substitutions, and changes can be made without departing from the scope of the invention. These embodiments and their variations are included in the scope and purpose of the invention, and are included in the invention described in the scope of the patent claim and the scope equivalent thereto.

Claims

1. A passenger conveyor, comprising a plurality of steps connected in a ring shape and moving in a circular motion between an upper staircase opening and a lower staircase opening, characterized in that: have: The first radar device irradiates a first person approaching the staircase entrance with radio waves, receives a reflected wave from the first person, and outputs first detection information related to the first person; as well as The control device controls the operation of the above-mentioned passenger conveyor based on the first detection information output from the above-mentioned first radar device.

2. The passenger conveyor according to claim 1, characterized in that The first detection information includes the moving direction of the first person. The above control device comprises: a determination unit that determines whether the first person is a person who intends to board the passenger conveyor based on the travel direction included in the first detection information; and The control unit starts the operation of the passenger conveyor when it is determined that the first person is a passenger.

3. The passenger conveyor according to claim 2, characterized in that The first detection information includes the speed of movement of the first person and the position of the first person. The control device further includes a calculation unit that calculates a time until the first person gets on the passenger conveyor based on the speed and position included in the first detection information. The control unit accelerates the moving speed of the plurality of steps to a rated speed based on the calculated time.

4. The passenger conveyor according to claim 1, characterized in that The first detection information includes the moving direction of the first person and the moving speed of the first person. The control device includes a control unit that controls the speed at which the plurality of steps move based on the moving direction and speed included in the first detection information.

5. The passenger conveyor according to claim 1, characterized in that The first detection information includes the moving direction of the first person and the moving speed of the first person. The control device includes a control unit configured to output a sound for notifying the passenger of the delay at the entrance based on the traveling direction and speed included in the first detection information.

6. The passenger conveyor according to any one of claims 1 to 5, characterized in that The passenger conveyor further includes a second radar device, which irradiates radio waves to a second person approaching the staircase entrance and receives reflected waves from the second person, thereby outputting second detection information related to the second person. The second detection information includes the moving direction of the second person. The control device includes a control unit that outputs a sound notifying that the passenger cannot board the passenger conveyor based on the traveling direction included in the second detection information.

7. The passenger conveyor according to any one of claims 1 to 5, characterized in that The above passenger conveyor further comprises: a second radar device that irradiates a second person approaching the stairwell and receives a reflected wave from the second person, thereby outputting second detection information related to the second person; a pair of skirt plates facing both sides of the plurality of steps; A railing is erected on the upper part of the skirt board; A handrail track is installed around the railing and revolves synchronously with the movement of the plurality of steps; as well as The entrance is an entrance to the handrail track provided on the skirt board. The second detection information includes the position of the second person. The control device includes a control unit configured to output an alarm when a difference between a position included in the second detection information and a position of the entrance is smaller than a threshold value.

8. The passenger conveyor according to any one of claims 1 to 5, characterized in that The passenger conveyor further includes a second radar device, which irradiates radio waves to a second person who has come down from the plurality of steps and is away from the staircase exit, and receives reflected waves from the second person, thereby outputting second detection information related to the second person. The second detection information includes the speed at which the second person moves. The control device includes a control unit that controls the speed at which the plurality of steps move based on the speed included in the second detection information.

9. A control method for a passenger conveyor, wherein a plurality of steps connected in a ring shape are cyclically moved between an upper staircase entrance and a lower staircase entrance, characterized in that: include: irradiating a first person approaching the stair entrance with radio waves, and receiving a reflected wave from the first person, thereby outputting first detection information related to the first person; and Based on the outputted first detection information, the operation of the passenger conveyor is controlled.

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