Elevator maintenance support system and elevator maintenance support method

Abstract

To appropriately determine whether an abnormality occurring in an elevator is a temporary abnormality or an abnormality caused by aging deterioration.SOLUTION: An elevator maintenance support system comprises, as a monitoring device 300, an abnormality detection unit 302 that monitors the operation of an elevator and detects abnormalities, and an abnormality reporting unit 303 that issues an abnormality report when an abnormality is detected by the abnormality detection unit 302. A diagnostic server 900 comprises a diagnosis unit 902 that analyzes the operation information of equipment installed in the elevator and diagnoses the elevator when an abnormality report is issued by the abnormality reporting unit 303. When an abnormality is reported by the monitoring device 300, the diagnosis unit 902 of the diagnostic server 900 determines whether the corresponding abnormality is a transient abnormality or an abnormality due to aging based on the trend of changes in measurement data during operation of the elevator, and transmits the determination result to a control center 800.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an elevator maintenance support system and an elevator maintenance support method.

Background Art

[0002] Many elevators connect a car and a counterweight with a rope and are driven by a winding machine in a hoistway type. And, an elevator remote monitoring device is installed in the elevator to be monitored, and acquires control information of the elevator and operation information of each device of the elevator from the elevator to be monitored. Thereby, the elevator remote monitoring device performs processing such as detecting an abnormality of the elevator and reporting it to the control center, or uploading operation information of the elevator to be monitored to a server.

[0003] Abnormalities detected by the remote monitoring device are classified into those caused artificially, such as mischief, and those caused by failures of elevator devices. When an abnormality occurs due to a failure of an elevator device, it is necessary to promptly dispatch a maintenance worker. On the other hand, in the case of an abnormality caused artificially, such as mischief, if there is no accompanying failure of the elevator device, it is not necessary to dispatch a maintenance worker. For this reason, various considerations have been made conventionally for discriminating between artificial abnormalities and abnormalities due to equipment failures.

[0004] For example, the control center stores in a database, in accordance with predetermined rules, the state of each device and the content of the response of the maintenance worker at the time of past failures. Then, for a newly occurring failure, the control center infers the cause of the failure and the response method of the maintenance worker from the failure content and the device state, and presents it to the operator of the control center. By performing such processing, the control center can determine whether the abnormality that has occurred in the elevator is artificial or due to a device failure.

[0005] Patent Document 1 describes a technique for obtaining user behavior information by comparing an elevator to be monitored when an abnormality occurs with the operation data of elevators with similar business types and uses. Patent Document 1 also describes a technique for obtaining variation information regarding the device operation of an elevator to be monitored when an abnormality occurs and an elevator of the same model, and determining whether the occurred abnormality is caused by human factors or a device failure based on the correlation between the behavior information and the variation information.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] When an elevator abnormality occurs, in either the case where the abnormality is caused artificially or by a device failure, the elevator with the abnormality may return to the normal state immediately after the abnormality is detected, and there may be a case where there is no abnormality when the maintenance staff arrives. Thus, the abnormalities that are in the normal state when the maintenance staff arrives can be classified into those considered to be transient abnormalities due to accidental causes and those considered to be aging abnormalities caused by device wear and the like.

[0008] Here, in the case of a transient abnormality, no cause investigation or corrective work by the maintenance staff is required. On the other hand, in the case of an aging abnormality, a cause investigation is carried out to identify the cause, and corrective work for the cause is necessary. Therefore, at the time of an abnormality occurrence, it is extremely important to determine whether the occurred abnormality is a transient abnormality or an aging abnormality in terms of the response when an elevator abnormality occurs. Conventionally, according to the technique described in Patent Document 1, for example, it is possible to determine whether an abnormality that has occurred in an elevator to be monitored is caused by human error or a failure by using information on similar elevators other than the one to be monitored. However, the technique described in Patent Document 1 does not distinguish whether the occurred abnormality is a transient abnormality or an abnormality due to aging deterioration.

[0009] In view of these points, an object of the present invention is to provide an elevator maintenance support system and an elevator maintenance support method capable of determining whether an abnormality that has occurred is a transient abnormality or an abnormality due to aging deterioration when an abnormality occurs in an elevator.

Means for Solving the Problems

[0010] To solve the above problems, for example, the configuration described in the claims is adopted. This application includes a plurality of means for solving the above problems. For example, the elevator maintenance support system of the present invention includes a monitoring device including an abnormality detection unit that monitors the operation of an elevator and detects an abnormality, and an abnormality reporting unit that performs an abnormality report when an abnormality is detected by the abnormality detection unit, and a diagnosis server including a diagnosis unit that communicates with the monitoring device and analyzes the operation information of the devices installed in the elevator at the time of the abnormality report to diagnose the elevator, and a control center that performs a notification when receiving the abnormality report from the monitoring device. Here, the diagnosis unit of the diagnosis server determines whether the corresponding abnormality is a transient abnormality or an abnormality due to aging deterioration based on the change tendency of the measurement data during the operation of the elevator when an abnormality report is made by the monitoring device, and transmits the determination result to the control center.

Effects of the Invention

[0011] According to the present invention, when an abnormality occurs in an elevator, it is possible to quickly determine whether the abnormality is a transient abnormality or an abnormality due to aging deterioration. Therefore, according to the present invention, it is possible to quickly take corrective measures for the abnormality, and overall, it is possible to quickly take corrective measures for the abnormality. Problems, configurations, and effects other than those described above will be clarified by the following description of the embodiments.

Brief Description of the Drawings

[0012]

Figure 1

Figure 2

Figure 3

Figure 4

Modes for Carrying Out the Invention

[0013] Hereinafter, an example of an elevator maintenance support system and an elevator maintenance support method according to an exemplary embodiment of the present invention (hereinafter referred to as "this example") will be described with reference to the accompanying drawings.

[0014] [Configuration Example of Elevator Maintenance Support System] FIG. 1 shows the overall configuration of the elevator maintenance support system in this example. The elevator maintenance support system of this example is a system that supports maintenance personnel who perform maintenance work on the elevator 100. In the elevator 100, the car 101 and the counterweight 102 are connected by the main rope 103, and when the traction machine 104 rotates, the car 101 travels in the upward direction 101a and the downward direction 101b. The elevator 100 shown in FIG. 1 is exemplified as stopping at each floor of the first floor F1, the second floor F2, the third floor F3, and the fourth floor F4, but the number of floors is merely an example.

[0015] The operation of the elevator 100 is controlled by an elevator control device 200 called an elevator control panel. The elevator control device 200 includes an operation control unit 201, a speed control unit 202, a measurement unit 203, and a communication unit 204. The operation control unit 201 controls the operating state of the elevator 100. The speed control unit 202 controls the speed of the vertical movement of the car 101 of the elevator 100.

[0016] The measurement unit 203 measures the operation time of various devices installed in the elevator 100 and acquires the measurement data of various sensors installed in the elevator 100. The communication unit 204 communicates with the outside. That is, the communication unit 204 is connected to the network line network 700 via the communication device 400 of the building where the elevator 100 is installed, and communicates with a control center 800, a diagnostic server 900, etc. to be described later.

[0017] A monitoring device 300 and a communication device 400 are connected to the elevator control device 200. The monitoring device 300 includes a measurement unit 301, an abnormality detection unit 302, an abnormality reporting unit 303, and a communication unit 304. The measurement unit 301 acquires the device operation information of the elevator 100 received via the elevator control device 200 and measures the operating state of the elevator 100. The abnormality detection unit 302 performs an abnormality detection process for detecting an abnormality of the elevator 100 based on the operating state measured by the measurement unit 301. When an abnormality is detected by the abnormality detection unit 302, the abnormality reporting unit 303 performs an abnormality reporting process for transmitting an abnormality report to the outside.

[0018] The communication unit 304 communicates with the outside. That is, the communication unit 304 is connected to the network line network 700 via the communication device 400 of the building where the elevator 100 is installed, and communicates with the control center 800, the diagnostic server 900, etc. connected thereto. The control center 800 and the diagnostic server 900 will be described later. Note that the monitoring device 300 may be installed in a building equipped with the elevator 100 and configured integrally with the elevator control device 200.

[0019] The communication device 400 includes a communication unit 401. The communication unit 401 connects the communication unit 204 of the elevator control device 200 and the communication unit 304 of the monitoring device 300 to the network line network 700 to execute communication with the mobile terminal 600, the control center 800, the server 900, etc.

[0020] The mobile terminal 600, the control center 800, and the diagnostic server 900 are connected to the network line network 700. Note that a wired or wireless telephone line network, etc. is used for the network line network 700. Alternatively, a dedicated line network line network 700 may be used.

[0021] The mobile terminal 600 is a communication terminal held by the maintenance staff 500 of the elevator 100. The maintenance staff 500 performs maintenance work on the elevator 100. In particular, when an abnormality occurs in the elevator 100, the maintenance staff 500 goes to the site and performs corrective work on the abnormality. As the mobile terminal 600, for example, a smartphone or a tablet terminal having a wireless telephone function is used. The mobile terminal 600 includes a display unit 601, an input unit 602, and a communication unit 603.

[0022] The display unit 601 performs display processing for displaying various information to the maintenance staff 500. The input unit 602 is used for the maintenance staff 500 to input various information, particularly the dispatch contact to the site. The communication unit 603 communicates with the outside via the network line network 700. Note that the communication unit 603 also has a function of making calls with the control center 800, the diagnostic server 900, etc.

[0023] The control center 800 includes a transmission / reception unit 801 and a communication unit 802. The transmission / reception unit 801 receives the abnormality report from the monitoring device 300. The communication unit 802 communicates with the outside via the network line network 700.

[0024] The diagnostic server 900 includes a data processing unit 901, a diagnostic unit 902, a database unit (DB unit) 903, and a communication unit 904. The data processing unit 901 processes the device operation information of the elevator 100 collected from the monitoring device 300. The diagnostic unit 902 analyzes the device information of the elevator 100 processed by the data processing unit 901 and performs diagnostic processing regarding abnormalities.

[0025] The database unit 903 stores the device operation information of the elevator 100 collected from the monitoring device 300 in a time - segmented manner for each elevator over a certain period. The communication unit 904 communicates with the outside via the network line network 700. In FIG. 1, for simplicity of explanation, only one elevator 100 is shown. However, in reality, the diagnostic server 900 collects data of multiple (a plurality of) elevators 100 and performs diagnostic processing. The control center 800 also performs control processing of multiple (a plurality of) elevators 100.

[0026] The elevator control device 200, the monitoring device 300, the mobile terminal 600, the control center 800, and the diagnostic server 900 shown in FIG. 1 can each be configured by a computer that performs information processing. For example, a computer serving as the diagnostic server 900 includes a CPU (Central Processing Unit) 911, a memory 912, a communication interface 913, etc., as shown in FIG. 1.

[0027] The CPU 911 is an arithmetic processing unit that reads and executes the program code of software that realizes the functions performed by the diagnostic server 900 from the memory 912. The CPU 911 reads the program code from the memory 912 and executes arithmetic processing in the work area of the memory 912, whereby various processing functional units are configured in the memory 912. For example, a data processing unit 901 and a diagnosis unit 902 are configured in the memory 912.

[0028] The memory 912 is a storage medium such as an HDD (Hard Disk Drive), an SSD (Solid State Drive), a memory card, etc., in addition to semiconductor memories called ROM (Read Only Memory), RAM (Random Access Memory), etc. In the memory 912, software that realizes the functions of the diagnosis server 900 and data obtained by the execution of the program are stored. The database unit 903 is also configured using the storage area of the memory 912. The communication interface 913 performs communication processing with other devices via a network. Although illustration is omitted, the elevator control device 200, the monitoring device 300, the mobile terminal 600, and the control center 800 are also configured by computer devices similar to the diagnosis server 900.

[0029] [Example of Processing When an Abnormality Occurs in the Elevator] FIG. 2 and FIG. 3 are flowcharts showing the flow of processing when an abnormality occurs in the elevator 100. The part “A” in FIG. 2 is connected to the part “A” in FIG. 3, and the part “B” in FIG. 2 is connected to the part “B” in FIG. 3.

[0030] When the abnormality detection unit 302 of the monitoring device 300 detects that an abnormality has occurred in the elevator 100 (step S101), the abnormality reporting unit 303 of the monitoring device 300 reports the abnormality to the control center 800 (step S102). Then, the alarm receiving unit 801 of the control center 800 receives the abnormality report, and the control center 800 notifies the diagnosis server 900 of the details of the abnormality through the communication unit 802 (step S103).

[0031] At this time, an abnormality notification is also sent from the control center 800 to the mobile terminal 600 of the maintenance staff 500. The maintenance staff 500 who has confirmed the abnormality notification will go to the location where the elevator 100 is installed. Then, when the maintenance staff 500 arrives at the location, they notify the diagnostic server 900 of the start of work using the mobile terminal 600 (step S104). Before the diagnostic unit 902 of the diagnostic server 900 receives the notification of the start of work from the mobile terminal 600 of the maintenance staff 500, it determines whether the abnormality that occurred in step S101 has been recovered (step S105).

[0032] If it is determined in step S105 that the abnormality has been recovered (YES in step S105), the diagnostic unit 902 reads out the equipment operation information of the elevator 100 before and after the occurrence of the abnormality from the database unit 903 in the diagnostic server 900 and performs an analysis of the abnormality (step S106). The analysis result in this step S106 is notified from the diagnostic server 900 to the mobile terminal 600 of the maintenance staff 500 (step S107). At this time, it also conveys that the abnormality has been recovered and it is a transient abnormality.

[0033] Moving on to the explanation at "A" in Figure 3, then, the diagnostic unit 902 of the diagnostic server 900 determines whether the analysis result of the abnormality is an abnormality due to aging deterioration (step S108). Specific examples of the determination of whether it is an abnormality due to aging deterioration will be described later. If it is an abnormality due to aging deterioration in step S108 (YES in step S108), the diagnostic unit 902 reads out the equipment operation information at the time of abnormality occurrence in another elevator that has a history of the same type of abnormality as this time from the database unit 903.

[0034] The diagnostic unit 902 of the diagnostic server 900 compares the equipment operation information at the time of abnormality occurrence in the other elevator it has read out with the equipment operation information at the time of this abnormality occurrence (step S109). Then, the diagnostic unit 902 determines whether there is a similar case in the comparison in step S109 (step S110).

[0035] If there is a similar case in step S110 (YES in step S110), the diagnostic server 900 presents the cause of the abnormality and the corresponding measures taken at that time for the similar case to the mobile terminal 600 of the maintenance staff 500 (step S111). Thereby, the maintenance staff 500 performs the abnormality correction work while referring to the presented cause of occurrence and corresponding measures (step S112), and completes the correction work (step S113).

[0036] Returning to FIG. 2 again to continue the explanation. If the abnormality has not been recovered in step S105 (NO in step S105), the maintenance staff 500 refers to the existing troubleshooting cases and performs the abnormality correction work (step S114), and completes the abnormality correction work (step S115).

[0037] In step S108 of FIG. 3, when the analysis result of the abnormality is not an aging abnormality but a transient abnormality (NO in step S108), the maintenance staff 500 only checks the current status of the elevator 100 and completes the work (step S116). Furthermore, in step S110, if there is no similar case (NO in step S110), the diagnostic server 900 notifies the mobile terminal 600 of the maintenance staff 500 that there is no similar case. The maintenance staff 500 who has confirmed this notification refers to the existing troubleshooting and performs the abnormality correction work (step S117), and completes the abnormality correction work (step S118).

[0038] [Example of determination process for aging abnormality or transient abnormality] FIG. 4 is a flowchart showing an example in which the diagnosis unit 902 of the diagnostic server 900 performs a determination process as to whether the abnormality that occurred in the elevator 100 is an aging abnormality or a transient abnormality. The determination in the flowchart shown in FIG. 4 is to determine an abnormality (landing level abnormality) detected by the monitoring device 300 when the floor level of the car 101 of the elevator 100 deviates from the floor level of the arrival floor by a certain amount or more when the car 101 stops at each floor F1 to F4.

[0039] First, when an abnormality in the landing level occurs (step S201), the diagnostic server 900 retrieves data on the differences in the landing levels in all directions for all floors in the elevator 100 from the database unit 903 of the diagnostic server 900 from a certain period before to the present (step S202).

[0040] Here, when the data on the most recent landing level is not stored in the database unit 903, the diagnostic server 900 causes the data stored in the elevator control device 200 or the monitoring device 300 to be transferred to the database unit 903. Also, the all directions here means both the upward direction 101a and the downward direction 101a shown in FIG. 1. That is, the difference in the landing levels in all directions for all floors is the difference in the landing levels for all floors at the time of landing during operation in the upward direction 101a and the difference in the landing levels for all floors at the time of landing during operation in the downward direction 101a.

[0041] Then, the diagnostic unit 902 of the diagnostic server 900 determines whether the landing level in any direction on any floor has a tendency to increase by a certain amount or more from a certain period before to the present (step S203). In step S203, if there is a tendency to increase by a certain amount or more in the difference in the landing level in any direction on any floor (YES in step S203), the diagnostic server 900 determines that the current abnormality is an aging deterioration abnormality and ends the analysis (step S204).

[0042] Also, in step S203, if there is no tendency to increase by a certain amount or more in the landing level (NO in step S203), the diagnostic unit 902 determines whether there is a similar level shift in the change tendency of the landing levels in a certain number or more of floors and directions (step S205). In step S205, if a similar tendency is observed in the change tendency of the landing level (YES in step S205), the diagnostic server 900 determines that the current abnormality is an aging deterioration abnormality and ends the analysis (step S206).

[0043] Also, in step S205, when no similar trend is observed in the change trend of the landing level (NO in step S205), the diagnosis unit 902 determines whether the landing levels in all directions on all floors have been normal since the occurrence of the abnormality, that is, whether they have never exceeded the abnormal values (step S207). In step S207, if the abnormal values are never exceeded (YES in step S207), the diagnosis server 900 determines that the current abnormality is a transient abnormality and ends the analysis (step S208). Furthermore, in step S207, if there is any abnormal value even once (NO in step S207), the diagnosis server 900 determines that the current abnormality is an aging deterioration abnormality and ends the analysis (step S209).

[0044] Note that in the process described in the flowchart of FIG. 4, when an abnormality in the landing level occurs, whether it is an aging deterioration abnormality or a transient abnormality is determined from the change trend of the landing level. However, the diagnosis server 900 can similarly determine whether it is an aging deterioration abnormality or a transient abnormality when other abnormalities occur.

[0045] For example, when an abnormality in the opening and closing of the door of the car 101 occurs, the diagnosis server 900 may determine, regarding the opening and closing time of the door, whether there is an increasing trend when landing on a specific floor, whether there is no abnormality in all floors and in all directions, etc., in the same way as the process in FIG. 4. Thereby, the diagnosis server 900 can also determine whether it is an aging deterioration abnormality or a transient abnormality when an abnormality in the opening and closing of the door occurs. Furthermore, when other abnormalities occur, the diagnosis server 900 can also determine whether it is an aging deterioration abnormality or a transient abnormality from the increasing trend of the measurement data corresponding to the elevator abnormality.

[0046] As described above, according to the elevator maintenance support system of this example, when an elevator abnormality occurs, it is possible to quickly determine whether the abnormality is a transient abnormality or an aging deterioration abnormality. Therefore, the elevator maintenance support system of this example can also quickly correct the abnormality, and overall, it is possible to quickly correct the abnormality. According to this example in particular, the mobile terminal 600 held by the maintenance staff is notified of whether it is an abnormal aging or a transient abnormality, enabling a quick response to the abnormality.

[0047] [Modification Example] In addition, the embodiments described so far have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. For example, in the configuration shown in FIG. 1, the diagnostic server 900 is provided separately from the control center 800. However, for example, a function as the diagnostic server 900 may be built into the terminal provided in the control center 800. Further, a diagnostic unit similar to the diagnostic unit 902 of the diagnostic server 900 may be built into the monitoring device 300 installed on the building side, and the control center 800 or the mobile terminal 600 may acquire the diagnostic result of the diagnostic unit in the monitoring device 300.

[0048] Alternatively, a diagnostic unit similar to the diagnostic unit 902 of the diagnostic server 900 may be built into the mobile terminal 600 held by the maintenance staff 500, and the mobile terminal 600 may acquire measurement data and the like from the elevator control device 200 for diagnosis.

[0049] Also, in the configuration diagram shown in FIG. 1, only the control lines and information lines considered necessary for explanation are shown, and not all control lines and information lines are necessarily shown in the product. In reality, it may be considered that almost all configurations are interconnected. Also, the flow of the processes shown in the flowcharts shown in FIGS. 2, 3, and 4 is also an example, and if the processing results are the same, the order of some processes may be changed, or a plurality of processes may be executed simultaneously.

[0050] Furthermore, the elevator control device 200, the monitoring device 300, the mobile terminal 600, the control center 800, and the diagnostic server 900 may, for example, implement a program for executing the processes described in each embodiment example on an existing computer to perform similar control processes. In this case, regarding the program to be implemented on the computer, in addition to being prepared in the storage or memory within the elevator control device 200, it may be placed on a recording medium such as an external memory, an IC card, an SD card, or an optical disk and transferred.

Explanation of Signs

[0051] 11 100…elevator, 102…counterweight, 103…main rope, 104…traction machine, 200…elevator control device, 201…operation control unit, 202…speed control unit, 203…measurement unit, 204…communication unit, 300…monitoring device, 301…measurement unit, 302…abnormality detection unit, 303…abnormality reporting unit, 304…communication unit, 400…communication device, 401…communication unit, 500…maintenance staff, 600…mobile terminal, 601…display unit, 602…input unit, 603…communication unit, 700…network line network, 800…control center, 801…report receiving and power supply unit, 802…communication unit, 900…diagnostic server, 901…data processing unit, 902…diagnosis unit, 903…database unit, 903…memory, 904…communication unit, 911…CPU, 912…memory, 913…interface, 913…communication interface

Claims

1. A monitoring device comprising an abnormality detection unit that monitors the operation of an elevator and detects abnormalities, and an abnormality reporting unit that issues an abnormality report when an abnormality is detected by the abnormality detection unit; A diagnostic server that communicates with the monitoring device and includes a diagnostic unit that analyzes the operation information of the devices installed in the elevator during the abnormality report and diagnoses the elevator; A control center that issues a notification when receiving an abnormality report from the monitoring device; An elevator maintenance support system composed of; When an abnormality is reported by the monitoring device, the diagnostic unit of the diagnostic server determines whether the corresponding abnormality is a transient abnormality or an abnormality due to aging deterioration based on the change trend of the measurement data during the operation of the elevator, and transmits the determination result to the control center. Elevator maintenance support system.

2. The monitoring device includes a measurement unit that acquires sensor data during the operation of the elevator and measures the operation status. When the abnormality at the time of the abnormality report from the abnormality reporting unit of the monitoring device is an abnormal landing level of the car at any floor, the diagnostic server acquires the data of the landing levels of all floors from a certain period before to the present measured by the measurement unit. The diagnostic unit of the diagnostic server determines whether the corresponding abnormality is a transient abnormality or an abnormality due to aging deterioration based on the change trend of the data of the landing levels of all floors acquired. The elevator maintenance support system according to Claim 1.

3. The data of the landing levels of all floors acquired by the diagnostic server are the data of the landing levels of each floor during the upward operation and the data of the landing levels of each floor during the downward operation. When the landing levels of all floors during the operation in both directions are normal after the occurrence of the abnormality, the diagnostic unit of the diagnostic server determines it as a transient abnormality. The elevator maintenance support system according to Claim 2.

4. Furthermore, the determination result obtained by the diagnostic unit of the diagnostic server is transmitted to and displayed on the terminal held by the maintenance staff who performs the maintenance work of the elevator. The elevator maintenance support system according to Claim 3.

5. When the determination result obtained by the diagnostic unit is an abnormality due to aging deterioration, based on the data accumulated by the diagnostic server, the corresponding content in past cases similar to the occurred abnormality is transmitted to and displayed on the terminal. The elevator maintenance support system according to Claim 4.

6. A monitoring device in a building where an elevator is installed, which performs an abnormality detection process for monitoring the operation of the elevator and detecting an abnormality, and an abnormality reporting process for reporting an abnormality to the outside from the monitoring device when an abnormality is detected in the abnormality detection process, and a diagnostic process for diagnosing the elevator by analyzing the operation information of the devices installed in the elevator through arithmetic processing when receiving the abnormality report by the abnormality reporting process, which is an elevator maintenance support method, in the diagnostic process, when an abnormality is reported by the monitoring device, it is determined whether the corresponding abnormality is a transient abnormality or an abnormality due to aging deterioration based on the change trend of the measurement data during the operation of the elevator, and the determination result is notified. Elevator maintenance support method.

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