JP7097330B2 - A device that detects the floating of the step tread of a passenger conveyor - Google Patents

Description

The present invention generally relates to a technique for detecting the floating of a step tread of a passenger conveyor.

Passenger conveyors such as escalators and moving walkways, which are transport machines installed in buildings, transport passengers on steps by circulating and driving a large number of steps connected in an endless manner by means of endless connecting chains. .. Due to the structure of entering and exiting the truss at the boarding / alighting part, this step is required to have a structure with as little gap as possible between the step and the plate on which passengers get on / off (the boundary with the inside of the truss). For this reason, the gap between the step tread and the boarding / alighting plate is designed to be, for example, several millimeters, and the ends of the tread and the boarding / alighting plate are comb-shaped (in other words, they mesh with each other) so that passengers' shoes can be used. The structure is such that clothes do not get inside the truss. The step is hit by an external factor (for example, rust, pebbles, etc. generated when rainwater or the like dripping on the step tread due to aged use enters the step tread formed in a comb shape and is installed on the boarding / alighting plate. It may float due to the impact when it comes in contact with it. When the step is stored in the boarding / alighting plate with the step tread raised above the permissible value, the step collides with the boarding / alighting plate. In order to prevent this, it is checked whether or not the step has risen in the regular maintenance and inspection work.

Patent Document 1 and Patent Document 2 disclose a technique for detecting the floating of a step tread.

Japanese Unexamined Patent Publication No. 2018-24489 Japanese Unexamined Patent Publication No. 2005-255303

It is desirable to improve the accuracy of maintenance management related to the lifting of the step tread. One of the reasons is that it can be expected that the exchange of specific steps or all steps will be performed at an appropriate time. However, if the control of the ascent of the step tread is uniform, it is difficult to improve the accuracy of maintenance management.

An object of the present invention is to improve the accuracy of maintenance management related to the ascent of the tread of a step in order to solve the above problems.

In order to solve the above-mentioned problems, a floating detection device (a device that detects the floating of a step tread in a passenger conveyor that is connected in an endless manner and circulates and drives a plurality of steps each having a step tread) is applicable to each step. In addition to detecting the amount of lift of the step tread of the step, the floating position of the step tread of the step is determined. The floating detection device performs a conveyor status determination including at least one of an abnormality step determination and a replacement timing determination, and outputs determination result information which is information indicating the result of the conveyor status determination. The abnormal step determination is to determine whether or not the step is an abnormal step (a step in which the amount of levitation detected for the step exceeds the threshold value according to the levitation position determined for the step tread). The replacement time determination is made out of each of the one or more steps and all the steps based on the deterioration rate for each of the one or more steps of the plurality of steps and the determined ascent position. It is to determine at least one replacement time. For each of the one or more steps, the deterioration rate is a rate obtained from the amount of levitation detected this time for the step and the detection time thereof, and the amount of levitation previously detected for the step and the time of detection thereof.

According to the present invention, it is possible to improve the accuracy of maintenance management related to the floating of the step tread.

The figure which shows the functional block of the floating detection apparatus which concerns on one Embodiment of this invention. The schematic diagram which shows the levitation detection by the levitation detection device. The figure which shows an example of the waveform of the detection signal of a levitation amount, and an example of the area of a step tread. The figure which shows an example of the flow of the process performed by a floating detection device. The figure which shows an example of the correction of the exchange time of a certain step. The figure which shows an example of the screen of the judgment result information.

In the following description, the "interface device" may be one or more interface devices. The one or more interface devices may be at least one of the following.
-One or more I / O (Input / Output) interface devices. The I / O interface device is an interface device for at least one of the I / O device and the remote display computer. The I / O interface device for the display computer may be a communication interface device. The at least one I / O device may be any of a user interface device, eg, an input device such as a keyboard and pointing device, and an output device such as a display device.
-One or more communication interface devices. One or more communication interface devices may be one or more homogenous communication interface devices (eg, one or more NICs (Network Interface Cards)) or two or more heterogeneous communication interface devices (eg, NICs). It may be HBA (Host Bus Adapter)).

Further, in the following description, the "memory" is one or more memory devices, and may be typically a main storage device. At least one memory device in the memory may be a volatile memory device or a non-volatile memory device.

Further, in the following description, the "permanent storage device" is one or more permanent storage devices. The permanent storage device is typically a non-volatile storage device (for example, an auxiliary storage device), and specifically, for example, an HDD (Hard Disk Drive) or an SSD (Solid State Drive).

Further, in the following description, the "storage device" may be at least a memory of a memory and a permanent storage device.

Also, in the following description, a "processor" is one or more processor devices. The at least one processor device is typically a microprocessor device such as a CPU (Central Processing Unit), but may be another type of processor device such as a GPU (Graphics Processing Unit). At least one processor device may be single-core or multi-core. At least one processor device may be a processor core. The at least one processor device may be a processor device in a broad sense such as a hardware circuit (for example, FPGA (Field-Programmable Gate Array) or ASIC (Application Specific Integrated Circuit)) that performs a part or all of the processing.

Further, in the following description, the function may be described by the expression of "kkk part", but the function may be realized by executing one or more computer programs by the processor, or one. It may be realized by the above hardware devices (for example, FPGA or ASIC), or may be realized by a combination thereof. The description of each function is an example, and a plurality of functions may be combined into one function, or one function may be divided into a plurality of functions.

Further, in the following description, a common code among reference codes may be used when the same type of elements are not distinguished, and a reference code may be used when the same type of elements are described separately. .. For example, when the steps are described without distinction, they may be described as "step 14", and when the individual steps are described separately, they may be described as "step 14a" and "step 14b". be.

Hereinafter, embodiments of the floating detection device according to the present invention will be described.

FIG. 1 shows a functional block of a floating detection device according to an embodiment of the present invention.

The levitation detection device 10 includes an I / O device 191, a movable arm 11 described later, a camera 13 described later, and a main body device 12 (for example, a computer) connected to them. The I / O device 191 may be a device that has both an input device and a display device, for example, a tablet-type calculator or a touch panel-type display device. The I / O device 191 may be separated into an input device and a display device.

The main body device 12 includes an interface device 101, a storage device 102, and a processor 103 connected to them.

The interface device 101 is connected to, for example, the I / O device 191 and the movable arm 11 and the camera 13. Information is input / output to / from the I / O device 191 via the interface device 101. Further, data from a sensor provided on the movable arm 11 and data showing an image captured by the camera 13 are input via the interface device 101.

The storage device 102 stores management information (for example, a table) or a program. The management information includes, for example, information indicating the history of the floating amount detected in the conveyor status determination for each step constituting the passenger conveyor. The program is executed by the processor 103.

By executing the program by the processor 103, for example, a floating amount detecting unit 1, a floating position determination unit 2, a conveyor status determination unit 3, and a result output unit 9 are realized. The conveyor status determination unit 3 includes, for example, an abnormality rank determination unit 4, a value I / O unit 8, a correction unit 5, an abnormality step determination unit 6, a replacement time determination unit 106, and a result recording unit 7.

The floating amount detecting unit 1 detects the floating amount of the step tread. The ascending position determination unit 2 determines the ascending position. The conveyor status determination unit 3 determines the conveyor status including at least one of the abnormality step determination and the replacement timing determination (both in the present embodiment). The abnormality rank determination unit 4 determines the abnormality rank of the step based on the floating position of the step for each step. For each step, the value I / O unit 8 records in the management information data indicating the amount of levitation detected this time and the detection time of the step, or the amount of levitation previously detected in the step and its detection thereof. Data indicating the time is read from the management information. For each step, the correction unit 5 corrects the determination value, which is the threshold value of the floating amount, or corrects the step replacement time, based on the abnormality rank of the step. The abnormality step determination unit 6 determines the abnormality step. In the abnormal step determination, for example, for each step, it is determined whether or not the step is an abnormal step (a step in which the floating amount exceeds the determination value). The exchange time determination unit 106 greatly determines the exchange time. In the replacement time determination, for example, at least one of each of the one or more steps and all the steps is replaced based on the deterioration rate for each of the one or more steps and the determined floating position. The time is determined. The result recording unit 7 records the determination result information, which is the information indicating the result of the conveyor status determination, in the management information. The result output unit 9 reads the recorded determination result information and outputs (for example, displays) the determination result information.

FIG. 2 shows levitation detection by the levitation detecting device 10.

The passenger conveyor transports passengers on the steps by circulating and driving a plurality of steps 14 connected in an endless manner by means of the endlessly connected chains. Each step 14 enters below one boarding / alighting plate of the passenger conveyor as it moves, and eventually exits below the other boarding / alighting plate of the passenger conveyor. In addition, in FIG. 2, steps 14a to 14e are exemplified.

The floating detection device 10 is mounted on one and / or the other boarding / alighting plate of the passenger conveyor in the maintenance / inspection of the passenger conveyor. That is, the floating detection device 10 according to the present embodiment is used at the site of maintenance and inspection.

The levitation detection device 10 has a movable arm 11, a camera 13, and a main body device 12 connected to them.

The movable arm 11 has a member extending over the width of step 14 and placed on the step tread at the tip thereof, and has a sensor (for example, a displacement sensor) that measures a value according to the height of the member. It can move in the vertical direction (+ z direction and −z direction) about a predetermined fulcrum according to the height of the step tread with which the member contacts. The width direction of the step is the y direction in FIG. Further, the member held at the tip of the movable arm 11 is, for example, a rod-shaped member extending in the width direction. The levitation amount is detected by the levitation amount detection unit 1 from the sensor value change (for example, the displacement amount) caused by the movable arm 11 following in the vertical direction according to the height of the tread.

The camera 13 photographs the step tread. The captured image may be a still image or a moving image. When a still image is adopted, for example, the camera 13 shoots in response to a shooting instruction from the main body device 12. The shooting instruction is issued by the main body device 12 when, for example, the main body device 12 determines that the relative relationship between the step position and the predetermined shooting position satisfies a predetermined condition based on the moving speed of the step or the like. The floating position determination unit 2 determines the floating position by analyzing the captured image of the camera 13.

The main body device 12 has an interface device 101, a storage device 102, and a processor 103 shown in FIG. The main body device 12 performs signal processing on the floating amount and the floating position for each step.

FIG. 3 shows an example of the waveform of the detection signal of the amount of levitation and an example of the region of the step tread.

In the present embodiment, the step tread has a front wheel side region 16a, a central region 16b, and a rear wheel side region 16c along the front-rear direction (+ x direction and −x direction in FIG. 2). For each step 14, it is measured at which position in the regions 16a to 16c and how much there is levitation.

The amount of floating in the vertical direction may be measured by non-contact laser distance measurement or the like. Further, the determination of the floating position may be determined by calculation, for example, from the amount of change in the laser and the speed of the passenger conveyor, instead of analyzing the image taken from the camera 13.

According to the signal waveforms exemplified in FIG. 3, the output waveforms 15a, 15b, 15c, 15d and 15e correspond to the steps 14a, 14b, 14c and 14d and 14e shown in FIG. 2, respectively.

Since step 14a is normal, the output waveform 15a is flat. Since the step 14b has a lift in the front wheel side region 16a, the portion corresponding to the front wheel side region 16a is high in the output waveform 15b. Since the whole of step 14c is raised, the output waveform 15c is flat, but the whole is higher than the output waveform 15a. Since the rear wheel side region 16c is raised in step 14d, the portion corresponding to the rear wheel side region 16c is high in the output waveform 15d. Since the step 14e has a bulge in the central region 16b, the portion corresponding to the central region 16b is high in the output waveform 15e.

Next, a process including detection of the amount of levitation and determination of the levitation position will be described with reference to FIG.

First, in S01, the value I / O unit 8 reads past detection data (for example, data indicating the floating amount and detection time of each step) from the management information (for example, a database). The previous detection value (for example, the previous levitation amount and the detection time) indicated by the past detection data is used to calculate the difference from the current detection value (for example, the current levitation amount and the detection time).

Next, in S02, the floating amount is detected by the floating amount detecting unit 1 and the floating position is determined by the floating position determination unit 2 for each step tread of the passenger conveyor.

Next, in S03, the abnormality step determination unit 6 determines whether or not the floating amount exceeds a predetermined value for each step. A step in which the amount of levitation exceeds a predetermined value is a step in which the boarding / alighting plate and the step tread do not come into contact with each other, but is regarded as a step requiring replacement. That is, the "predetermined value" referred to here is an example of a determination value, for example, an absolute determination value as a determination value as a reference.

Next, in S04, the abnormality step determination unit 6 classifies the step into one of the deterioration modes A and B for each step in which the floating amount does not exceed a predetermined value. The deterioration mode A means that the floating position does not exist in either the front wheel side region 16a or the rear wheel side region 16c. The deterioration mode B means that the floating position is in either the front wheel side region 16a or the rear wheel side region 16c.

In the case of a passenger conveyor in which the steps move only in a certain direction between the boarding / alighting plates, the deterioration mode B may mean that the floating position is in the front wheel side region 16a. In other words, the step whose floating position is not in the front wheel side region 16a may be classified into the deterioration mode A instead of the deterioration mode B. This is because the ascent in the central region 16b and the rear wheel side region 16c is less important than the ascent in the front wheel side region 16a. Specifically, even if there is a floating portion in the center of the step tread or on the rear wheel side with respect to the moving direction of the step and the floating portion collides with the boarding / alighting plate, the collision causes the step tread to get on and off. Since the collision occurs on the way after entering the plate, a force that pushes down the step tread works, and it is unlikely that the step will be damaged even if the collision occurs.

Further, S03 may be performed after S04, but it is considered to be more efficient if it is performed before S04. This is because, in S04, the number of steps classified into either deterioration mode A or B may be smaller than in the case where S03 is performed after S04.

Next, in S05, the abnormal step determination unit 6 calculates the ratio of the number of abnormal steps to the total number of steps. The "abnormal step" is a step in which the detected floating amount exceeds the determination value according to the deterioration mode. The determination value according to the deterioration mode may be prepared in advance, but in the present embodiment, for example, the following is performed.
-For each deterioration mode, the correction unit 5 determines a determination value corresponding to the deterioration mode based on the reference value (for example, an absolute determination value), in other words, the reference value is determined to correspond to the deterioration mode. Correct to the value. The correction of the reference value may be performed based on the number of steps classified into the deterioration mode. That is, the corrected determination value may be a value according to at least the deterioration mode among the deterioration mode and the number of steps classified into the deterioration mode.
-For each deterioration mode, the abnormality step determination unit 6 determines whether or not the step is an abnormality step in which the floating amount exceeds the determination value corresponding to the deterioration mode for each step classified into the deterioration mode. judge.
-The abnormality step determination unit 6 calculates the abnormality ratio, which is the ratio of the number of abnormality steps to the total number of steps (the number of steps possessed by the passenger conveyor). The abnormal rate may be different for each deterioration mode.

Next, in S06, the correction unit 5 determines the degree of correction of the replacement time according to the deterioration rate for each rank.

Here, for each step, the "deterioration rate" is a speed obtained from the amount of levitation detected this time for the step and the detection time thereof, and the amount of levitation previously detected for the step and the time of detection thereof.

Further, the "rank" follows at least the deterioration mode of the deterioration mode and the abnormality rate. In this embodiment, there are the following four ranks. In addition, "partially abnormal" means that the abnormal ratio is less than a predetermined ratio, that is, a part of the steps in the passenger conveyor is considered to be abnormal. "Overall abnormality" means that the abnormality ratio is equal to or higher than a predetermined ratio, that is, it is considered that there is an abnormality in the steps of the passenger conveyor as a whole. Which of the partial abnormality and the total abnormality has occurred may be determined by the replacement timing determination unit 106 based on the abnormality ratio calculated in S05.
Rank 1: Deterioration mode A and partial abnormality Rank 2: Deterioration mode A and overall abnormality rank 3: Deterioration mode B and partial abnormality rank 4: Deterioration mode B and overall abnormality

According to the example of FIG. 4, the degree of correction for each rank determined by the replacement time determination unit 106 in S06 is as follows. It should be noted that the larger the degree of correction, the earlier the replacement time, that is, the time when the floating amount reaches the absolute determination value is considered to be earlier. In the present embodiment, for the reason described later, the smaller the value (%) as the degree of correction, the larger the degree of correction.
-The degree of correction is larger in the deterioration mode B than in the deterioration mode A. This is because having a floating position in the front wheel side region 16a or the rear wheel side region 16c is more important than having no floating position in any of those regions 16a and 16c.
・ The degree of correction is larger for all abnormalities than for partial abnormalities. This is because it is more important to replace the steps in whole than to replace the steps partially.

In S07, the replacement time determination unit 106 determines the replacement time of the abnormal step based on the correction degree determined in S06. Here, the abnormal step in which the replacement timing is corrected may be each abnormal step in the case of a partial abnormality, or may be each abnormal step in the case of a total abnormality, and a specific abnormal step (for example, the floating amount is the largest). Only a large abnormal step) may be used. An example of the details of S07 is as follows.

For example, regarding a step classified into rank 3 in which a deterioration rate at which the amount of levitation reaches an absolute determination value is obtained after 24 months, since the step has a correction degree of “80%” (24 months later). ) × (0.8) = Make corrections that will be replaced after about 19 months. According to the example of FIG. 4, for the steps classified into rank 4, since the correction degree is “70%” (because the correction degree becomes further 10% stricter), (after 24 months) × (0). .7) = Correction will be made so that the replacement time will be about 16 months later. When the lift of the single step tread occurs at multiple positions (for steps where the number of lift positions is larger than the predetermined number in some abnormalities), the degree of correction may be increased, in other words, the replacement time is It may be judged more severely.

FIG. 5 shows an example of correction of the replacement time of a certain step. The horizontal axis corresponds to time, and the vertical axis corresponds to the amount of levitation. The slope K06 obtained from the second (previous) measurement point K01 (floating amount and detection time) and the third (current) measurement point K02 corresponds to the deterioration rate. According to this slope K06, the exchange time K04 in which the floating amount is predicted to reach the absolute determination value X is obtained. Here, for the third time, when the certain step is classified into rank 3, the degree of correction is 80%, so that the predicted replacement time K04 is corrected to the replacement time K07, which has a life of 80%. As a result, the inclination K03 is corrected to the inclination K06.

In S08, the result recording unit 7 performs aggregation. For example, for each rank, the number of abnormal steps classified into the rank is totaled, the identification number of the abnormal step classified into the rank is totaled, and for each abnormal step, the floating position, the floating amount, and the exchange are totaled. The time is totaled. The information indicating the aggregation result is recorded in the storage device 102 by the result recording unit 7 as the determination result information.

Finally, in S09, the result output unit 9 outputs the determination result information. The output may be to send the information to a predetermined address by a method such as e-mail, or may be displayed on the I / O device 191.

FIG. 6 shows an example of a screen for displaying the determination result information.

The screen 600 displays rank-specific information H01, step-specific information H02, and captured image H03.

The rank-specific information H01 includes, for example, the following information.
The number of steps exceeding the determination value in S03 and the identification number for each step exceeding the determination value in S03 (these information is displayed at the top).
-For each rank, the number of abnormal steps classified into the rank and the identification number for each step classified into the rank.

The step-specific information H02 includes, for example, information indicating an identification number, a floating position, a floating amount, and a predicted exchange time (corrected exchange time) for each abnormal step. The arrangement of abnormal steps may be changed in the order of earliest predicted exchange time. This facilitates maintenance and management.

The captured image H03 is, for example, a captured image of the step tread of the step determined by the result recording unit 7 to be the most deteriorated based on the amount of levitation and the number of levitation positions. The captured image H03 may be a captured image of the step tread of each step in which the degree of deterioration determined based on the amount of levitation and the number of levitation positions belongs to the upper Nth place (N is a natural number).

The above explanation can be summarized as follows, for example.

The floating detection device 10 is a device that detects the floating of a step tread in a passenger conveyor that is connected in an endless manner and circulates and drives a plurality of steps each having a step tread. The levitation detection device 10 has a levitation amount detection unit 1 that detects the levitation amount of the step tread of the step for each step, and a levitation position determination unit that determines the levitation position of the step tread of the step for each step. 2, a conveyor status determination unit 3 that performs a conveyor status determination including at least one of an abnormality step determination and a replacement timing determination, and a result output unit that outputs determination result information that is information indicating the result of the conveyor status determination. 9 and. The abnormal step determination is to determine whether or not the step is an abnormal step. The abnormal step is a step in which the amount of levitation detected for the step exceeds the determination value (threshold value) according to the levitation position determined for the step tread. The replacement timing determination is based on the deterioration rate and the determined floating position for each of the one or more steps (for example, the step in which the floating amount is determined to be less than the absolute determination value in S03). It is to determine the exchange time of at least one of each of the above steps and all the steps. The replacement time of all steps may be, for example, the earliest replacement time of one or more replacement times corresponding to one or more steps. For each of the one or more steps, the deterioration rate is a rate obtained from the amount of levitation detected this time for the step and the detection time thereof, and the amount of levitation previously detected for the step and the time of detection thereof.

In this way, since the conveyor status is determined according to the floating position of the step tread, highly accurate maintenance management can be expected.

The result output information includes a first result information (for example, rank-specific information H01) which is information indicating the result of the abnormality step determination and a second result information (for example) which is information indicating the result of the exchange time determination. At least one of the step-specific information H02) may be included. The first result information may include information about anomalous steps with levitation at the levitation position for each of the plurality of levitation positions. The second result information may include information indicating a determined replacement time for at least some of the steps of the one or more steps described above.

Areas of the step tread are distinguished, for example: The step tread includes a first region which is a region including at least one of an edge on the moving direction side of the step and an edge on the opposite side of the moving direction of the step, and a second region which is a region other than the first region. .. An example of the first region is at least the front wheel side region 16a of the front wheel side region 16a and the rear wheel side region 16c. An example of the second region is the central region 16b. The second region may include, for example, a rear wheel side region 16c (an example of a region including an edge on the opposite side of the step moving direction) if the moving direction of the step is constant. For each step, the determined ascent position is either the first region or the second region of the step tread of the step.

The difference between the first region and the second region corresponds to, in other words, the difference in the importance of the ascent position. This is because even if there is a raised part in the center or rear of the step tread with respect to the moving direction of the step and the raised part collides with the boarding / alighting plate, there is a possibility that the step will be damaged as described above. Because it is low. Conveyor condition determination is performed in consideration of the importance of such a floating position, and therefore highly accurate maintenance management can be expected.

The replacement time of a single step is the time when the amount of floating of the step reaches a predetermined value according to the deterioration rate of the step. The replacement timing determination includes, for each of the above-mentioned one or more steps, correcting the replacement timing according to the deterioration rate of the step according to the floating position determined for the step.

From this, it is expected that an appropriate replacement time will be determined based on the importance according to the floating position.

When the conveyor status determination includes both an abnormal step determination and a replacement time determination, the replacement timing determination determines the replacement time of the step for each of the above-mentioned one or more steps, and the floating position determined for the step. In addition, it includes correction according to the ratio of the number of abnormal steps to the total number of steps.

As a result, it is expected that a more appropriate replacement time will be determined based on the importance according to the ratio of the number of abnormal steps as well as the importance according to the floating position.

In the device having the above-mentioned levitation amount detection unit 1, levitation position determination unit 2, conveyor status determination unit 3, and result output unit 9, predetermined software is executed on a plurality of types of calculation resources such as a cloud platform. This may be realized as a software-defined system. In this case, data necessary for detecting the amount of levitation (for example, measurement data by a sensor) may be transmitted to the system. The ascent position may be determined from the signal waveform indicated by the data and the moving speed of the step. Further, data used for determining the floating position (for example, data showing a captured image of the step tread) may also be transmitted to the system, and the floating position may be determined using the data.

The floating detection device 10 according to the above-described embodiment is a device used at a site where a passenger conveyor is located. Specifically, the levitation detection device 10 is connected to a sensor (for example, the above-mentioned movable arm 11) that measures a value according to the height of the step tread, a camera 13 that photographs the step tread, and the like. It is provided with a main body device 12. The main body device 12 is a control device including a floating amount detecting unit 1, a floating position determination unit 2, a conveyor status determination unit 3, and a result output unit 9. The levitation amount detection unit 1 detects the levitation amount of the step tread of the step based on the change of the value measured by the sensor for each step. The levitation position determination unit 2 determines the levitation position for each step based on the image captured by the camera. The determination result information includes information indicating a captured image of at least one abnormal step.

This supports maintenance and inspection of users (for example, maintenance personnel) in the field.

Although one embodiment of the present invention has been described above, this is an example for the purpose of explaining the present invention, and the scope of the present invention is not limited to this embodiment. The present invention can also be implemented in various other forms.

10: Uplift detection device

Claims (5)

It is a device that detects the floating of a step tread in a passenger conveyor that is connected in an endless manner and circulates and drives a plurality of steps each having a step tread.
For each step, a floating amount detection unit that detects the floating amount of the step tread of the step, and
For each of the steps, a floating position determination unit that determines the floating position on the step tread of the step, and a floating position determination unit.
A conveyor status determination unit that determines the conveyor status including at least one of an abnormality step determination and a replacement timing determination, and a conveyor status determination unit.
A result output unit for outputting determination result information, which is information indicating the result of the conveyor status determination, is provided.
The abnormal step determination is to determine whether or not the step is an abnormal step.
The abnormal step is a step in which the amount of levitation detected for the step exceeds the threshold value according to the levitation position determined for the step tread.
The replacement time determination is based on the deterioration rate for each of the one or more steps among the plurality of steps and the determined ascent position, and each of the one or more steps and all the steps. To determine when to replace at least one of them,
For each of the one or more steps, the deterioration rate is a rate obtained from the amount of levitation detected this time for the step and the detection time thereof, and the amount of levitation previously detected for the step and the time of detection thereof.
Device. For each of the plurality of steps, the step tread of the step has a first region which is a region including at least one of an edge on the moving direction side of the step and an edge on the opposite side of the moving direction of the step, and the first region. Including the second region, which is a region other than the region,
For each step, the determined ascent position is either the first region or the second region of the step tread of the step.
The device according to claim 1. The replacement time of a single step is the time when the amount of floating of the step reaches a predetermined value according to the deterioration rate of the step.
The replacement time determination includes, for each of the one or more steps, correcting the replacement time according to the deterioration rate of the step according to the floating position determined for the step.
The device according to claim 1. The conveyor status determination includes both the abnormality step determination and the replacement timing determination.
In the exchange timing determination, for each of the one or more steps, the exchange timing of the step is corrected according to the ratio of the number of abnormal steps to the total number of steps in addition to the floating position determined for the step. including,
The device according to claim 3. A sensor that measures the value according to the height of the step tread, and
A camera that shoots the step tread and
It is provided with a main body device which is a control device connected to the sensor and the camera and having the floating amount detection unit, the floating position determination unit, the conveyor status determination unit, and the result output unit.
The floating amount detecting unit detects the floating amount of the step tread of the step based on the change of the value measured by the sensor for each step.
The levitation position determination unit determines the levitation position for each step based on the image captured by the camera.
The determination result information includes information indicating a captured image of at least one abnormal step.
The apparatus according to any one of claims 1 to 4.

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