Elevator diagnostic system and diagnostic method

Abstract

The present invention provides a diagnosis system and a diagnosis method that can diagnose an abnormality in a door torque of an elevator in consideration of influence of an operation environment. A diagnosis system (19) comprises a measurement unit (21), an acquisition unit (23), a correction unit (22), and a determination unit (25). The measurement unit (21) measures the door torque when a door of an elevator (1) opens or closes. The acquisition unit (23) acquires an offset value which corrects the measured value of the door torque by the measurement unit (21) on the basis of environmental information at the time when the measurement unit (21) measured the door torque. The environmental information includes information relating to at least one of the temperature and the humidity. The correction unit (22) uses the offset value acquired by the acquisition unit (23) to correct the measured value of the door torque by the measurement unit (21). The determination unit (25) determines an abnormality in the door torque when a difference between the value of the door torque corrected by the correction unit (22) and a reference value set in advance is greater than a threshold value set in advance.

Description

Technical Field

[0001] The present disclosure relates to an elevator diagnosis system and a diagnosis method.

Background Art

[0002] Patent Document 1 discloses an example of an elevator diagnosis system. In the diagnosis system, door torque when the elevator door opens and closes is measured. The diagnosis system determines an abnormality based on the measured door torque.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The diagnosis system of Patent Document 1 diagnoses an abnormality regardless of the operating environment such as temperature and humidity. On the other hand, the door torque of an elevator may be affected by the operating environment such as temperature and humidity. Therefore, the accuracy of diagnosis may decrease depending on the operating environment.

[0005] The present disclosure relates to solving such problems. The present disclosure provides a diagnosis system and a diagnosis method capable of diagnosing an abnormality in the door torque of an elevator in consideration of the influence of the operating environment.

Means for Solving the Problems

[0006] The elevator diagnosis system according to the present disclosure includes a measurement unit that measures the door torque when the elevator door opens and closes at each constant opening degree between fully closed and fully open, and based on environmental information including information on at least one of the temperature and humidity when the measurement unit measures the door torque, individually corrects the measured value of the door torque by the measurement unit for each opening degreeSet individually for each opening degree. The system includes an acquisition unit that acquires an offset value, a correction unit that corrects the door torque measurement value by the measurement unit using the offset value, and a determination unit that determines an abnormality in door torque when the difference between the door torque value corrected by the correction unit and a preset reference value is greater than a preset threshold.

[0007] The elevator diagnostic method according to this disclosure includes a measurement step of measuring the door torque when opening and closing the elevator door at certain opening degrees between fully closed and fully open, and individually correcting the measured value of the door torque in the measurement step for each opening degree based on environmental information including at least one of the temperature and humidity information at the time the door torque was measured in the measurement step. Set individually for each opening degree. The system includes an acquisition step of acquiring an offset value, a correction step of correcting the measured value of the door torque in the measurement step using the offset value, and a determination step of determining an abnormality in the door torque when the difference between the corrected door torque value and a preset reference value is greater than a preset threshold. [Effects of the Invention]

[0008] According to the diagnostic system or diagnostic method described herein, it is possible to diagnose abnormalities in elevator door torque while taking into account the influence of the operating environment. [Brief explanation of the drawing]

[0009] [Figure 1] This is a diagram showing the configuration of an elevator according to Embodiment 1. [Figure 2] This is a block diagram showing the configuration of the diagnostic system according to Embodiment 1. [Figure 3] This figure shows an example of an offset value in the diagnostic system according to Embodiment 1. [Figure 4] This figure shows an example of an offset value in the diagnostic system according to Embodiment 1. [Figure 5] This flowchart shows an example of the operation of the diagnostic system according to Embodiment 1. [Figure 6] This is a hardware configuration diagram of the main components of the diagnostic system according to Embodiment 1. [Modes for carrying out the invention]

[0010] The embodiments for carrying out the subject matter of this disclosure will be described with reference to the attached drawings. In each drawing, the same or corresponding parts are denoted by the same reference numerals, and redundant explanations are simplified or omitted as appropriate. However, the subject matter of this disclosure is not limited to the following embodiments, and any modification of any component of the embodiments or omission of any component of the embodiments is possible without departing from the spirit of this disclosure.

[0011] Embodiment 1. Figure 1 is a diagram showing the configuration of elevator 1 according to Embodiment 1.

[0012] Elevator 1 is applicable, for example, to a building having multiple floors. In the building, a hoistway 2 for elevator 1 is provided. The hoistway 2 is a long vertical space spanning multiple floors. On each floor of the building, a landing 3 for elevator 1 is provided. The landing 3 is a place that leads to the hoistway 2. At each landing 3 on each floor, a landing door 4 is provided. The landing door 4 comprises a landing door panel 5 and a landing sill 6. The landing door panel 5 separates the hoistway 2 and the landing 3. The landing door panel 5 opens and closes along the landing sill 6. Elevator 1 comprises a hoisting machine 7, a main rope 8, a car 9, a counterweight 10, and a control panel 11.

[0013] The hoisting machine 7 is located, for example, at the top or bottom of the hoistway 2. For example, if the machine room for the elevator 1 is located above the hoistway 2, the hoisting machine 7 may be located in the machine room. The hoisting machine 7 comprises a motor that generates driving force and a sheave that rotates by the driving force generated by the motor.

[0014] The main rope 8 is wound around the sheave of the hoisting machine 7. The main rope 8 supports the load of the cage 9 on one side of the sheave of the hoisting machine 7. The main rope 8 supports the load of the counterweight 10 on the other side of the sheave of the hoisting machine 7. The main rope 8 moves by the driving force generated by the motor of the hoisting machine 7, either being wound up onto the sheave of the hoisting machine 7 or being unwound from the sheave of the hoisting machine 7.

[0015] The elevator car 9 is a device that transports users of the elevator 1 between multiple floors by traveling vertically in the hoistway 2. The elevator car 9 is equipped with a car door 12. The car door 12 is equipped with a door drive device 13, a car door panel 14, and a car sill 15. The door drive device 13 is equipped with a door motor that generates driving force. The car door panel 14 separates the inside and outside of the elevator car 9. The car door panel 14 opens and closes along the car sill 15 by the driving force generated by the door motor of the door drive device 13. When the elevator car 9 stops at any floor, the car door panel 14 opens and closes in conjunction with the landing door panel 5 of that floor. The counterweight 10 is a device that balances the loads on both sides of the sheave of the hoisting machine 7 with the elevator car 9. The elevator car 9 and the counterweight 10 travel in opposite directions vertically in the hoistway 2 in conjunction with the movement of the main rope 8.

[0016] The control panel 11 is a device that controls the operation of the elevator 1. The control panel 11 is located, for example, at the top or bottom of the hoistway 2. For example, if the machine room for the elevator 1 is located above the hoistway 2, the control panel 11 may be located in the machine room. The operation of the elevator 1 controlled by the control panel 11 includes, for example, the movement of the car 9. The control panel 11 is connected to the hoisting machine 7 and the car 9 so that it can output control signals for the elevator 1 and can acquire information about the state of the elevator 1.

[0017] In elevator 1, a remote monitoring device 16 is applied. The remote monitoring device 16 is a device used for remotely monitoring the state of elevator 1. The remote monitoring device 16 is connected to the control panel 11 so as to be able to collect information on the state of elevator 1 and also output an external control signal to elevator 1. The information collected by the remote monitoring device 16 is transmitted to the central management device 18 through a communication network 17 such as the Internet or a telephone line. The central management device 18 is a device that collects and manages information on the state of elevator 1. The central management device 18 is provided at a base such as an information center. The central management device 18 is composed of, for example, one or more server devices. A part or all of the functions of the central management device 18 may be implemented by processing and storage resources on a cloud service.

[0018] In elevator 1, a diagnostic system 19 is applied. The diagnostic system 19 is a system for diagnosing the state of elevator 1 such as abnormalities. The diagnostic system 19 determines an abnormality in the door torque generated by the door motor of the door drive device 13 as the state of elevator 1. The diagnostic system 19 may be an internal system of elevator 1 or an external system applied to elevator 1 from the outside. The diagnostic system 19 determines an abnormality in the door torque, for example, in the diagnostic operation of elevator 1 performed at a preset timing. The preset timing is, for example, a regular timing such as once a month. The diagnostic system 19 includes an environmental sensor 20 and a measurement unit 21.

[0019] The environmental sensor 20 is a part equipped with a function for measuring environmental information representing the operating environment of the door drive device 13. The environmental sensor 20 is provided, for example, in the hoistway 2. In this example, the environmental sensor 20 is arranged near the control panel 11. The environmental sensor 20 may be arranged near the door drive device 13 in the car 9. The environmental information includes at least one of the temperature and humidity of the hoistway 2. In this example, the environmental information includes both the temperature and humidity of the hoistway 2. The environmental sensor 20 is, for example, a temperature and humidity sensor that measures temperature and humidity.

[0020] The measurement unit 21 is a part equipped with a function for measuring the door torque when the door of the elevator 1 is opened and closed. The measurement unit 21 measures, for example, the door torque generated by the door motor of the door drive device 13 to open and close the car door panel 14. In this example, the measurement unit 21 is provided in the door drive device 13.

[0021] The diagnostic system 19 diagnoses an abnormality in the door torque using the environmental information measured by the environmental sensor 20 and the door torque measured by the measurement unit 21.

[0022] FIG. 2 is a block diagram showing the configuration of the diagnostic system 19 according to Embodiment 1.

[0023] The diagnostic system 19 includes a correction unit 22, an acquisition unit 23, a calculation unit 24, a determination unit 25, and a reporting unit 26. In this example, the functions of the correction unit 22, the acquisition unit 23, the determination unit 25, and the reporting unit 26 are mounted on the control panel 11. Also, the function of the calculation unit 24 is mounted on the central management device 18.

[0024] The correction unit 22 is a part equipped with a function for performing correction according to the environmental information on the measured value of the door torque by the measurement unit 21. The measurement unit 21 measures the door torque, for example, during a diagnostic operation. The correction unit 22 performs correction of the door torque measured at this time. The correction unit 22 corrects the measured value of the door torque by adding an offset value according to the environmental information to the door torque measured by the measurement unit 21.

[0025] The acquisition unit 23 is equipped with a function to acquire an offset value used by the correction unit 22 to correct the measured value of the door torque. The acquisition unit 23 acquires environmental information when the measurement unit 21 measures the door torque. For example, the acquisition unit 23 acquires environmental information from the environmental sensor 20 when the measurement unit 21 measures the door torque. The acquisition unit 23 also acquires environmental information during diagnostic operation, for example.

[0026] The calculation unit 24 is the part that has the function of calculating an offset value based on environmental information. The calculation unit 24 receives environmental information from the acquisition unit 23. The calculation unit 24 outputs the offset value calculated based on the received environmental information to the acquisition unit 23. The offset value output by the calculation unit 24 is provided to the correction unit 22 through the acquisition unit 23.

[0027] The determination unit 25 determines that there is an abnormality in the door torque when the difference between the door torque value corrected by the correction unit 22 and the reference value is greater than a preset threshold. The determination unit 25 uses, for example, the measured value measured by the measurement unit 21 when the elevator 1 is first started up after normal operation has been confirmed, such as after installation or maintenance inspection, as the reference value. Here, the environmental information at the time the door torque that will become the reference value is measured may be stored in the diagnostic system 19 together with the reference value. The temperature and humidity represented by the environmental information at this time may be used as, for example, the reference temperature and reference humidity. The determination unit 25 may also use the door torque value corrected by the correction unit 22 based on the environmental information at this time as the reference value.

[0028] The alarm unit 26 is a component that provides notification of the determination result when the determination unit 25 determines that there is an abnormality in the door torque. In this example, the alarm unit 26 notifies the central control device 18 of the determination result. In the central control device 18, the alarm from the alarm unit 26 is processed by the management unit 27, which manages information on the status of elevator 1. Based on the alarm from the alarm unit 26, appropriate action is taken, such as dispatching maintenance personnel to elevator 1 where the abnormality has occurred.

[0029] Next, we will explain examples of offset values ​​in the diagnostic system 19 using Figures 3 and 4. Figures 3 and 4 show examples of offset values ​​in the diagnostic system 19 according to Embodiment 1.

[0030] In this example, the offset value depends on the difference between the environmental information when the reference door torque was measured and the environmental information when the door torque being diagnosed was measured. More specifically, the offset value depends on the difference between the reference temperature and the temperature when the door torque being diagnosed was measured. Furthermore, the offset value depends on the difference between the reference humidity and the humidity when the door torque being diagnosed was measured.

[0031] Figure 3 shows an example of the relationship between the offset value and the temperature difference from the reference temperature. In the graph in Figure 3, the horizontal axis represents the temperature difference, and the vertical axis represents the offset value. The relationship between the offset value and the temperature difference may be linear or nonlinear. Furthermore, the offset value may be a continuous or discrete value with respect to the temperature difference.

[0032] Figure 4 shows an example of the relationship between the offset value and the humidity difference from the reference humidity. In the graph in Figure 3, the horizontal axis represents the humidity difference, and the vertical axis represents the offset value. The relationship between the offset value and the humidity difference may be linear or nonlinear. The offset value may also be a continuous or discrete value with respect to the humidity difference. The relationship between the offset value and environmental information may include interactions that represent the synergistic effect of the temperature difference and the humidity difference.

[0033] The calculation unit 24 calculates the offset value using the environmental information received from the acquisition unit 23, based on the relationship shown in Figures 3 and 4, for example. The relationship between the offset value and the environmental information is stored in the central control device 18, on which the calculation unit 24 is installed, for example. The relationship between the offset value and the environmental information is set based on, for example, prior tests or simulations. The relationship between the offset value and the environmental information may also be set based on the measured values ​​in the elevator 1, for example, as follows. In this example, the relationship between the offset value and the environmental information is determined in the calculation unit 24.

[0034] The calculation unit 24, through the acquisition unit 23, acquires the measured value measured by the measurement unit 21 during the first startup of elevator 1 after its normal operation has been confirmed, such as after installation or maintenance inspection, as a reference value. At this time, the calculation unit 24 also acquires environmental information at the time the door torque, which will be the reference value, was measured. Thus, the calculation unit 24 acquires a combination of the reference value and environmental information. Based on multiple combinations of the reference value and environmental information, the calculation unit 24 constructs a model representing the relationship between the reference value and environmental information, for example, by simple regression or multiple regression. The calculation unit 24 may also construct a model representing the relationship between the reference value and environmental information, for example, by machine learning, based on multiple combinations of the reference value and environmental information. The calculation unit 24 may also use measured values ​​from other elevators of the same model as elevator 1 to construct a model representing the relationship between the reference value and environmental information. In this case, the calculation unit 24 may also use only measured values ​​from other elevators of the same model as elevator 1. The calculation unit 24 sets the reference temperature and humidity as the reference operating environment, and sets the relationship between the offset value and environmental information based on the difference between the reference value of door torque in the reference operating environment and the reference value of door torque in other operating environments.

[0035] Next, we will explain an example of the operation of the diagnostic system 19 using Figure 5. Figure 5 is a flowchart showing an example of the operation of the diagnostic system 19 according to Embodiment 1. The process shown in Figure 5 is performed, for example, during a diagnostic operation at a predetermined timing.

[0036] In step S101, the control panel 11 opens or closes the car door panel 14 using the door torque generated by the door drive unit 13. At this time, the control panel 11 obtains the measured value of the door torque from the measurement unit 21. In this example, the measurement unit 21 measures the value of the door torque generated by the door motor of the door drive unit 13 at a certain opening degree between the fully closed and fully open positions of the car door panel 14. That is, the measurement unit 21 obtains the door torque at each opening degree of the car door panel 14 as a measured value. After that, the diagnostic system 19 proceeds to step S102.

[0037] In step S102, the control panel 11 acquires environmental information from the environmental sensor 20. In this example, the control panel 11 acquires temperature and humidity information for the elevator shaft 2 as environmental information. Subsequently, the diagnostic system 19 proceeds to step S103.

[0038] In step S103, the acquisition unit 23 of the control panel 11 provides the calculation unit 24 of the central management device 18 with the environmental information acquired in step S102. Subsequently, the diagnostic system 19 proceeds to step S104.

[0039] The calculation unit 24 calculates an offset value based on the temperature and humidity represented by the environmental information received from the acquisition unit 23. For example, the calculation unit 24 calculates the difference between the temperature and humidity represented by the environmental information and the temperature and humidity in the reference operating environment as a temperature difference and a humidity difference. Using the calculated temperature difference and humidity difference, the calculation unit 24 calculates an offset value based on, for example, the relationship shown in Figures 3 and 4. Here, if the measured value of the door torque is a value for each degree of opening of the car door panel 14, the offset value may be set individually for each degree of opening, or it may be set as a single value averaged over each degree of opening. The calculation unit 24 of the central control device 18 outputs the calculated offset value to the acquisition unit 23 of the control panel 11.

[0040] In step S104, the acquisition unit 23 of the control panel 11 acquires the offset value from the calculation unit 24 of the central management device 18. After that, the diagnostic system 19 proceeds to step S105.

[0041] In step S105, the correction unit 22 corrects the measured value of the door torque obtained in step S101 with the offset value obtained in step S104. In this example, the correction unit 22 corrects the measured value of the door torque by adding the offset value. Here, if the measured value of the door torque is a value for each degree of opening of the cage door panel 14, the correction unit 22 corrects the door torque for each degree of opening. After that, the processing of the diagnostic system 19 proceeds to step S106.

[0042] In step S106, the determination unit 25 performs a process to determine whether or not there is an abnormality in the door torque. The determination unit 25 calculates the difference between the door torque value corrected in step S105 and a preset reference value. The reference value at this time is preset as, for example, a reference value in a standard operating environment. The determination unit 25 determines that there is an abnormality in the door torque when the calculated difference exceeds a preset threshold. Here, if the measured value of the door torque is a value for each degree of opening of the car door panel 14, the determination unit 25 calculates the difference from the reference value for each degree of opening. The determination unit 25 may determine that there is an abnormality in the door torque when, for example, the difference exceeds the threshold at any degree of opening, or it may determine that there is an abnormality in the door torque when the sum of the differences for each degree of opening or the sum of the absolute values ​​of the differences exceeds the threshold. When the determination unit 25 determines that there is an abnormality in the door torque because the difference in the door torque exceeds a preset threshold, the processing of the diagnostic system 19 proceeds to step S107. On the other hand, if the difference in door torque does not exceed a preset threshold and the determination unit 25 does not determine that there is an abnormality in the door torque, the processing of the diagnostic system 19 ends.

[0043] In step S107, the alarm unit 26 of the control panel 11 notifies the management unit 27 of the central management device 18 of the determination result in step S106. Based on the notified information, the management unit 27 performs the necessary actions to respond, such as dispatching maintenance personnel to the elevator 1 where the abnormality occurred. After that, the processing of the diagnostic system 19 is completed.

[0044] As described above, the diagnostic system 19 according to Embodiment 1 comprises a measurement unit 21, an acquisition unit 23, a correction unit 22, and a determination unit 25. The measurement unit 21 measures the door torque when the elevator door 1 is opened and closed. The acquisition unit 23 acquires an offset value to correct the measured value of the door torque by the measurement unit 21 based on environmental information at the time the measurement unit 21 measures the door torque. The environmental information includes information on at least one of temperature and humidity. The correction unit 22 corrects the measured value of the door torque by the measurement unit 21 using the offset value acquired by the acquisition unit 23. The determination unit 25 determines that there is an abnormality in the door torque when the difference between the corrected door torque value by the correction unit 22 and a preset reference value is greater than a preset threshold. Furthermore, the diagnostic method according to Embodiment 1 comprises a measurement step, an acquisition step, a correction step, and a determination step. The measurement step is a step of measuring the door torque when the door of the elevator 1 is opened and closed. The acquisition step is a step of acquiring an offset value to correct the measured value of the door torque in the measurement step based on environmental information at the time the door torque was measured in the measurement step. The correction step is a step of correcting the measured value of the door torque in the measurement step with the offset value acquired in the acquisition step. The determination step is a step of determining an abnormality in the door torque when the difference between the corrected door torque value in the correction step and a preset reference value is greater than a preset threshold.

[0045] With this configuration, the measured door torque is corrected using an offset value obtained based on environmental information. An abnormality in the door torque of elevator 1 is diagnosed based on the door torque corrected using the offset value. This allows for the diagnosis of an abnormality in the door torque of elevator 1, taking into account the effects of the operating environment. At the lower door shoe of the landing door panel 5, which is guided by the landing sill 6, or at the lower door shoe of the car door panel 14, which is guided by the car sill 15, changes in physical properties such as dimensions and elasticity may occur due to temperature changes. In addition, changes in humidity may cause changes in the coefficient of friction, etc., at these sills and door shoes. For this reason, the door torque of elevator 1 may be affected by the operating environment, such as temperature and humidity. Since the diagnostic system 19 takes into account the effects of the operating environment, such as temperature and humidity, the accuracy of the diagnosis is further improved.

[0046] The diagnostic system 19 also includes an environmental sensor 20. The environmental sensor 20 is located in the hoistway 2 of the elevator 1. The environmental sensor 20 measures environmental information. The acquisition unit 23 acquires the environmental information from the environmental sensor 20.

[0047] With this configuration, the measured value of the door torque is corrected based on the environmental information actually measured in the elevator shaft 2. As a result, the influence of the operating environment is taken into account with greater accuracy, and the accuracy of the diagnosis in the diagnostic system 19 is further improved.

[0048] The diagnostic system 19 also includes a calculation unit 24. The calculation unit 24 calculates an offset value based on environmental information received from the acquisition unit 23. The acquisition unit 23 obtains the offset value from the calculation unit 24.

[0049] The acquisition unit 23 may also acquire environmental information from an external weather information service. This external weather information service is provided, for example, by a public institution or weather service provider that handles weather information. The acquisition unit 23 acquires weather information at the location of the building to which the elevator 1 is applied, for example, through a communication network 17. The acquisition unit 23 acquires information such as temperature and humidity as weather information. The acquisition unit 23 may also acquire weather information such as sunny or rainy as weather information. In this case, the acquisition unit 23 stores in advance the corresponding environmental information for each type of weather information, for example, sunny or rainy. Based on the acquired weather information, the acquisition unit 23 acquires an offset value using the corresponding environmental information.

[0050] This configuration makes it possible to apply the diagnostic system 19 even when the elevator is not equipped with environmental sensors.

[0051] Furthermore, the calculation unit 24 may be mounted on an external computing device outside the diagnostic system 19. The computing device consists of, for example, one or more server devices connected to the communication network 17. The central management device 18 may be an external device included in another system separate from the diagnostic system 19. In this case, the central management device 18, which incorporates functions such as the calculation unit 24, is an example of an external computing device outside the diagnostic system 19. Also, some or all of the functions of the diagnostic system 19, such as the correction unit 22, acquisition unit 23, determination unit 25, and alarm unit 26, may be mounted on the control panel 11, remote monitoring device 16, central management device 18, or other devices of the elevator 1.

[0052] Furthermore, the diagnostic system 19 may perform diagnostics during the normal operation of the elevator 1. For example, the diagnostic system 19 may diagnose whether there is an abnormality in the door torque each time the car door panel 14 opens and closes during normal operation.

[0053] Next, we will explain an example of the hardware configuration of the diagnostic system 19 using Figure 6. Figure 6 is a hardware configuration diagram of the main components of the diagnostic system 19 according to Embodiment 1.

[0054] Each processing function in the diagnostic system 19 can be implemented by a processing circuit. The processing circuit comprises at least one processor 100a and at least one memory 100b. The processing circuit may also include at least one dedicated hardware 200 together with the processor 100a and memory 100b, or as a substitute for them.

[0055] When the processing circuit includes a processor 100a and a memory 100b, each function of the diagnostic system 19 is realized by software, firmware, or a combination of software and firmware. At least one of the software and firmware is written as a program. This program is stored in the memory 100b. The processor 100a realizes each function of the diagnostic system 19 by reading and executing the program stored in the memory 100b.

[0056] The processor 100a is also called a CPU (Central Processing Unit), processing unit, arithmetic unit, microprocessor, microcomputer, or DSP. The memory 100b is composed of non-volatile or volatile semiconductor memory such as RAM, ROM, flash memory, EPROM, or EEPROM.

[0057] If the processing circuit includes dedicated hardware 200, the processing circuit may be implemented as, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC, an FPGA, or a combination thereof.

[0058] Each processing function in the diagnostic system 19 can be implemented by a separate processing circuit. Alternatively, all functions of the diagnostic system 19 can be implemented together by a single processing circuit. Some functions of the diagnostic system 19 may be implemented by dedicated hardware 200, while others are implemented by software or firmware. Thus, the processing circuit implements each function of the diagnostic system 19 using dedicated hardware 200, software, firmware, or a combination thereof. [Industrial applicability]

[0059] The content output system described herein is applicable to elevators. [Explanation of symbols]

[0060] 1 Elevator, 2 Hoistway, 3 Landing, 4 Landing door, 5 Landing door panel, 6 Landing sill, 7 Hoisting machine, 8 Main rope, 9 Car, 10 Counterweight, 11 Control panel, 12 Car door, 13 Door drive mechanism, 14 Car door panel, 15 Car sill, 16 Remote monitoring device, 17 Communication network, 18 Central management device, 19 Diagnostic system, 20 Environmental sensor, 21 Measurement unit, 22 Correction unit, 23 Acquisition unit, 24 Calculation unit, 25 Judgment unit, 26 Alarm unit, 27 Management unit, 100a Processor, 100b Memory, 200 Dedicated hardware

Claims

1. A measuring unit that measures the door torque when opening and closing the elevator door at regular intervals between fully closed and fully open positions, An acquisition unit acquires an offset value that is individually set for each opening degree in order to individually correct the measured value of the door torque by the measurement unit for each opening degree, based on environmental information including information on at least one of temperature and humidity when the measurement unit measures the door torque. A correction unit corrects the measured value of the door torque by the measurement unit using the offset value, A determination unit determines an abnormality in door torque when the difference between the door torque value corrected by the correction unit and a preset reference value is greater than a preset threshold, An elevator diagnostic system equipped with [the following features].

2. The acquisition unit acquires the environmental information from an external weather information service. The elevator diagnostic system according to claim 1.

3. An environmental sensor is placed in the elevator shaft and measures the environmental information. Equipped with, The acquisition unit acquires the environmental information from the environmental sensor. The elevator diagnostic system according to claim 1.

4. Calculation unit that calculates the offset value based on the environmental information received from the acquisition unit Equipped with, The acquisition unit acquires the offset value from the calculation unit. An elevator diagnostic system according to any one of claims 1 to 3.

5. The calculation unit calculates the offset value using a combination of a reference value, which is the measured value of the door torque measured by the measurement unit during the first startup after the elevator has been installed or after maintenance and inspection and normal operation has been confirmed, and the environmental information at the time the reference value was measured. The elevator diagnostic system according to claim 4.

6. The acquisition unit provides the environmental information to an external computing device, and acquires the offset value calculated by the computing device based on the environmental information from the computing device. An elevator diagnostic system according to any one of claims 1 to 3.

7. A measurement step that measures the door torque when opening and closing the elevator door at regular intervals between fully closed and fully open positions, An acquisition step in which an offset value is individually set for each opening degree in order to individually correct the measured value of the door torque in the measurement step based on environmental information including at least one of the temperature and humidity information at the time the door torque was measured in the measurement step, A correction step in which the measured value of the door torque in the measurement step is corrected by the offset value, A determination step in which, when the difference between the corrected door torque value and a preset reference value is greater than a preset threshold, determines an abnormality in the door torque, A diagnostic method for elevators that includes [specific features / features].

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