JP2009040585A - Elevator abnormality diagnostic system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elevator abnormality diagnostic system capable of taking countermeasures for the next maintenance and check, preventing any failure in advance, and suppressing the call-out number of maintenance staff by predicting the timing leading to a failure in an early stage. <P>SOLUTION: A primary diagnostic device 20 and a secondary diagnostic device 30 are provided on an elevator 10 side and on a monitoring center 31 side, respectively. The primary diagnostic device 20 detects any symptom of abnormality while collecting the data of each apparatus, periodically transmits the data of each apparatus to the monitoring center 31, and immediately sends information on the apparatus from which any symptom of abnormality is detected and transmits the data. The secondary diagnostic device 30 saves the data of each apparatus in the database 34, and predicts the timing of any failure of each apparatus from the history of the data. When the failure timing of any apparatus is close, the maintenance staff is called. While the apparatus is not failed before the next maintenance and checking, the maintenance staff is not called to reduce the call-out number of the maintenance staff. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an abnormality diagnosis system for diagnosing an abnormality of each device such as an elevator door or a hoisting machine.

  The elevator plays an important role as a vertical transportation system, and once the elevator breaks down and becomes unusable, it causes great inconvenience to users. For this reason, it is important to constantly monitor the state of the elevator and prevent failure.

2. Description of the Related Art Conventionally, there is an elevator management system disclosed in Patent Document 1 as an elevator state monitoring apparatus. This management system consists of an elevator control device and a management unit (monitoring center). An inspection device is provided on the elevator control device side to inspect elevator abnormalities, and data from the inspection device is collected and processed on the management unit side. This function is provided.
Japanese Patent No. 3016933

  However, in the elevator management system of Patent Document 1 described above, when data of each device is collected, only the presence or absence of an abnormality is detected by comparison with a preset threshold value. For this reason, even if the device has not yet failed, if it is determined to be abnormal by comparison with the threshold value, there is a problem that inspection work at the site is required, and the number of times the maintenance staff works is increased. In this case, if the threshold value is raised, the number of times the maintenance staff is available can be reduced, but there is a possibility that a failure may occur depending on the state of the device.

  The present invention has been made in view of the above points, and by predicting the time to failure at an early stage, it is possible to cope with the next maintenance inspection, prevent the failure in advance, It is an object of the present invention to provide an elevator abnormality diagnosis system that can minimize the number of times of service.

  An elevator abnormality diagnosis system according to the present invention includes a primary diagnosis device provided in an elevator control panel and a secondary diagnosis device provided in a monitoring center connected to the primary diagnosis device via a network. In this elevator abnormality diagnosis system, the primary diagnosis device includes a data collection means for periodically collecting data of each device to be monitored from the control panel, and each device collected by the data collection means. Storage means for storing the data, first diagnostic means for detecting an abnormality sign from the data of each device stored in the storage means, and periodically transmitting the data of each device to the monitoring center A communication means for transmitting the data of the device including the diagnosis result when an abnormality sign is detected by the first diagnosis means, and the secondary diagnosis The apparatus includes a communication unit that receives data of each device from the primary diagnostic device, a database that stores data of each device received by the communication unit, and a history of data of each device stored in the database. The second diagnosis means for analyzing the state change of each device based on the above and predicting the time when the failure will occur, and a predetermined response process for the device determined to be near the failure time by the second diagnosis means And a failure coping means for performing the above.

  According to the present invention, it is possible to respond at the time of the next maintenance inspection by predicting the time to the failure at an early stage, thereby preventing the failure in advance and minimizing the number of times the maintenance staff has been assigned. .

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

(First embodiment)
FIG. 1 is a diagram showing a configuration of an elevator abnormality diagnosis system according to a first embodiment of the present invention.

  A car 12 is connected to one end of the main rope 11 of the elevator 10 and a counterweight 13 is connected to the other end. When the hoisting machine 14 is driven, the car 11 and the counterweight 12 move in a lifting manner in the hoistway through the main rope 11 wound around the hoisting machine 14.

  The operation control of the car 12 is performed by a control panel 15 installed in a machine room or the like. The control panel 15 is a general-purpose computer having a CPU, ROM, RAM, and the like. A tail cord 16 is attached to the lower end of the car 12. Transmission of control signals between the car 12 and the control panel 15 and power supply to the car 12 are performed via the tail cord 16.

  Here, in this system, the primary diagnosis device 20 and the secondary diagnosis device 30 are provided, and the abnormality diagnosis of the elevator 10 is performed in two stages.

  The primary diagnostic device 20 is used as a “simple diagnostic device” and has a function of detecting signs of abnormality with respect to each device of the elevator 10. The primary diagnosis apparatus 20 is provided on the control panel 15 of the elevator 10 and includes a data collection unit 21, a storage unit 22, a diagnosis unit 23, and a communication unit 24.

  The data collection unit 21 collects data of each device to be monitored from the control panel 15. The storage unit 22 stores the data of each device collected by the data collection unit 21. The diagnosis unit 23 is a part that performs a primary diagnosis process, and detects an abnormality sign by comparing each device data stored in the storage unit 22 with a reference value set in advance. The communication unit 24 performs communication processing with the secondary diagnosis device 30, and periodically transmits the data of each device collected by the data collection unit 21 to the monitoring center 31, and also sends the data to the diagnosis unit 23. If a sign of abnormality is detected, the device data including the diagnosis result is transmitted immediately.

  On the other hand, the secondary diagnostic device 30 is used as an “abnormality diagnostic device” and has a function of predicting a failure time for a device in which a sign of abnormality is detected by the primary diagnostic device 20. The secondary diagnostic device 30 is provided in the monitoring center 31.

  The monitoring center 31 exists in a remote place and remotely monitors the operation state of the elevator 10 via the network 40. Although only one elevator 10 is shown in the example of FIG. 1, a large number of elevators scattered in various places are actually connected to the monitoring center 31 via the network 40. The monitoring center 31 constantly monitors the operating state of these elevators, and dispatches maintenance personnel to the site when any abnormality is detected.

  The secondary diagnostic device 30 provided in the monitoring center 31 includes a communication unit 32, a diagnostic unit 33, a database 34, and a failure handling unit 35.

  The communication unit 32 performs data communication with the primary diagnosis apparatus 20. The data of each device received by the communication unit 32 is given to the diagnosis unit 33 and the database 34. The diagnosis unit 33 is a part that performs secondary diagnosis processing, and analyzes the change in the state of each device based on the history of the data of each device stored in the database 34 to predict when the failure will occur. The database 34 stores the data of each device for each type of elevator (see FIG. 6). The failure handling unit 35 performs a predetermined response process on a device that has been determined by the diagnosis unit 33 to have a near failure time.

Next, the processing operation of this system will be described.
2 and 3 are flowcharts showing the processing operation of this system. FIG. 2 shows the processing on the primary diagnostic device 20 side, and FIG. 3 shows the processing on the secondary diagnostic device 30 side.

First, processing on the primary diagnostic apparatus 20 side will be described.
As shown in FIG. 2, in the primary diagnostic apparatus 20 provided in the elevator 10, the data collection unit 21 collects data of each device to be monitored from the control panel 15 at a predetermined cycle (step A11). Each device is, for example, the door of the car 12 or the hoisting machine 14. Further, the “data” referred to here is data (operation data) indicating the operation state of the equipment during elevator operation. For example, in the case of the door of the car 12, it is opening / closing time.

  The period for collecting data of these devices is determined by the characteristics of the devices to be monitored. That is, for a device whose state changes gradually after a sign of abnormality appears and the period until failure occurs is long, the collection cycle is lengthened. Conversely, for equipment that fails in a relatively short time after a sign of abnormality appears, shorten the collection cycle and collect data so that the early detection of the sign of abnormality and the estimation accuracy at the time of failure are not reduced. Shall.

  Specifically, since the period until the hoisting machine 14 fails is usually very long, the data collection period for the hoisting machine 14 may be long. On the other hand, the door of the car 12 is relatively easy to break down and immediately affects the operation of the elevator. Therefore, it is necessary to shorten the data collection period for the door.

  As shown in FIG. 4, the period table 21a provided in the data collection unit 21 stores data collection periods (T1, T2,...) Set in advance for each device to be monitored. The data collection unit 21 collects data of each device at a period determined with reference to the period table 21a.

  Note that the data collection cycle of each device stored in the cycle table 21a can be arbitrarily changed through the cycle changing unit 21b. The cycle changing unit 21b performs a data collection cycle changing process in accordance with an input operation by a maintenance worker or an external instruction from the monitoring center 31 on the elevator 10 side.

  Further, the period in which the secondary diagnosis apparatus 30 acquires the data of each device from the primary diagnosis apparatus 20 is the same as or longer than the data collection period of the data collection unit 21.

  In addition, for example, when collecting opening / closing data for a door in a cycle of one week, not all the data in the week is sent, but the maximum value, minimum value, average value, and latest data in the week are not sent. It may be extracted and sent. However, in the case of a door, there may be a floor where there is no user during the collection period and the opening / closing data cannot be collected. In that case, the door is automatically inspected at a less frequently used time if necessary, and the opening / closing data obtained at that time is sent.

  In addition, if the data collected on a weekly basis includes data that is significantly different from other data, that data is excluded. For example, when opening / closing of the door is hindered by mischief or the like, the door does not open / close within a certain time, and thus an abnormal value is detected. Such apparently abnormal data is a factor that lowers the diagnostic accuracy, and is excluded from the collected data.

  The primary diagnosis apparatus 20 stores the data of each device collected in this way in the storage unit 22 (step A12), and then performs a primary diagnosis process by the diagnosis unit 23 (step A13). In this primary diagnosis process, an abnormality sign is detected by comparison with a reference value preset for each device.

  As shown in FIG. 5, the reference value table 23a provided in the diagnosis unit 23 stores reference values (K1, K2,...) Of devices to be monitored in advance. The diagnosis unit 23 refers to the reference value table 23a to determine whether or not the data of each device exceeds the determined reference value.

  If it is below the reference value (Yes in step A14), the diagnosis unit 23 determines that there is no abnormality, continues data collection as it is, and when the regular transmission time comes (Yes in step A16), the communication unit 24 Data is transmitted to the monitoring center 31 (step A17).

  Note that data transmission to the monitoring center 31 is performed by transmitting collected data collectively in order to reduce communication costs and the burden on the monitoring center 31, and the result of remote inspection performed approximately once a month. It is also possible to send it together. The data of each device transmitted from the primary diagnostic device 20 to the monitoring center 31 is received by the secondary diagnostic device 30 provided in the monitoring center 31, where secondary diagnosis is performed.

  On the other hand, if there is a device exceeding the reference value as a result of the primary diagnosis (No in step A14), the diagnosis unit 23 regards that an abnormality sign has appeared (step A15), and immediately checks the monitoring center 31. , To that effect, and transmits the data of the device (step A17).

Next, processing on the secondary diagnostic apparatus 30 side will be described.
As shown in FIG. 3, the secondary diagnostic device 30 provided in the monitoring center 31 receives the data of each device periodically transmitted from the primary diagnostic device 20 or the primary diagnostic device 20. When the data of the device in which the sign of abnormality is detected is received (step B11), the diagnosis unit 23 executes the secondary diagnosis process (step B12).

  In this secondary diagnosis process, the time when each device will fail is predicted. As shown in FIG. 6, in the database 34, the data of each device collected from each elevator is classified and stored by ID information (0001, 0002, 0003...).

  The diagnosis unit 23 analyzes the change in the state of the device from the data received this time and the history of past data stored in the database 34 using a prediction formula created from the data of the same model stored in the database 34. And predict the time until failure. This prediction formula is prepared for each device.

  FIG. 7 shows a failure prediction result when the door opening / closing time is taken as an example. When the state change of the device is analyzed from the current received data (data 5) and past data (data 1 to 4), and the door opening / closing time reaches a preset failure determination threshold (Kx) according to the prediction formula Is determined as the failure time (Tx).

  Here, when the state change of the device is stable and the interval from the current time to the failure time (Tx) is equal to or longer than the predetermined period (No in Step B13), the diagnosis unit 33 still has a low possibility of failure. The data of the device is stored as it is in the database 34 (step B14).

  On the other hand, when it is determined that the failure time is close, that is, when the interval from the current time to the failure time (Tx) is less than the predetermined period (Yes in step B13), the diagnosis unit 33 performs maintenance inspection (not shown). In light of the schedule, it is determined whether or not the device will fail until the next maintenance check, and the result is passed to the failure handling unit 35 (step B15).

  As a result, when it is determined that there is no failure until the next maintenance inspection (No in Step B15), the failure coping section 35 specifies that the failure of the device is close to the maintenance inspection schedule, etc. Adjustment is made so that it can be handled at the next maintenance inspection (step B16). At this time, as shown in FIG. 5, the database 34 stores the data of the device with the attribute information “adjustment” to that effect (step B17).

  In addition, when it is determined that a failure occurs by the next maintenance check date (Yes in Step B15), the failure coping section 35 immediately brings a maintenance staff to the site and responds immediately (Step B18). In this case, the monitoring center 31 may contact the branch office to send the maintenance staff to the site, or, for example, directly contact the maintenance staff's mobile terminal using e-mail or the like, and send it to the site. That's fine. When the maintenance staff is dispatched to the site, as shown in FIG. 5, the attribute information “maintenance staff serving” is added to the data of the device and stored in the database 34 (step B19).

  The same processing is performed for each device. In this case, even if it is not determined that the failure time is near by the secondary diagnosis, the failure coping unit 35 adjusts the device for which an abnormality sign is detected by the primary diagnosis so that it corresponds to the next maintenance check. Shall.

  In addition, although no sign of abnormality was detected in the primary diagnosis, the failure handling unit 35 should investigate the equipment that shows signs of abnormality as a result of the secondary diagnosis at the next maintenance inspection as necessary. Thus, it is possible to pick up the buds of the failure early.

  As described above, when the abnormality diagnosis of each device of the elevator 10 is performed, the diagnosis is divided into the primary diagnosis and the secondary diagnosis, and after the simple diagnosis is performed by the primary diagnosis, the state change of the device is analyzed by the secondary diagnosis. In addition, by predicting the time until failure, it is possible to cope with the next maintenance inspection, so that the failure can be prevented and the number of times the maintenance staff can be used can be suppressed as much as possible.

(Second Embodiment)
Next, a second embodiment of the present invention will be described.
FIG. 8 is a diagram showing the configuration of an elevator abnormality diagnosis system according to the second embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the same part as the structure of FIG. 1 in the said 1st Embodiment, and the description shall be abbreviate | omitted.

  In the second embodiment, one primary diagnostic apparatus 20 is connected to a plurality of elevators 10a, 10b, 10c installed in the same building. As in the first embodiment, the primary diagnosis apparatus 20 includes a data collection unit 21, a storage unit 22, a diagnosis unit 23, and a communication unit 24.

  The data collection unit 21 collects data of each device from the control panels 15 of the elevators 10a, 10b, and 10c at a predetermined period. In addition, the data collection period of each apparatus may be set in common in the elevators 10a, 10b, and 10c, or may be set individually. The storage unit 22 stores data of each device classified for each elevator.

Subsequent processing is the same as in the first embodiment.
That is, after storing the data of each device of the elevators 10a, 10b, and 10c in the storage unit 22, the diagnosis unit 23 performs a primary diagnosis process to detect an abnormality sign. Then, the data of each device is periodically transmitted to the monitoring center 31, and the device in which the abnormality sign is detected in the primary diagnosis is immediately notified and the data is transmitted.

  The secondary diagnostic device 30 provided in the monitoring center 31 receives the data of each device of the elevators 10a, 10b, and 10c through the communication unit 32. Then, the diagnosis unit 33 performs a secondary diagnosis process, and predicts the time until each device will break down using the current data and the history of past data stored in the database 34. As a result of the prediction, if there is a device with a near failure time, the maintenance staff will be dispatched, but if the failure does not occur until the next maintenance inspection, the maintenance staff will be dispatched by responding without dispatching the maintenance staff. Reduce the number of times.

  As described above, the same effect as described above can be obtained by diagnosing a plurality of elevators 10a, 10b, and 10c installed in the same building with one primary diagnostic device 20. In this case, there is an advantage that the cost can be significantly reduced as compared with the case where the primary diagnostic apparatus 20 is individually installed in each of the elevators 10a, 10b, and 10.

  In addition, when it is set as the structure which diagnoses several elevators with one primary diagnostic apparatus, while the burden of a diagnostic part increases, it is necessary to also increase the capacity | capacitance of a memory | storage part. However, if the diagnosis time of each elevator is adjusted so as to be shifted, the burden on the diagnosis unit can be reduced and the capacity of the storage unit can be dealt with without increasing.

  In the configuration of FIG. 8, three elevators are taken as an example. However, a configuration in which a number of elevators are connected to the primary diagnosis apparatus to perform primary diagnosis processing is also possible.

  In short, the present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the components without departing from the scope of the invention in the implementation stage. In addition, various forms can be formed by appropriately combining a plurality of constituent elements disclosed in the above embodiments. For example, some components may be omitted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

FIG. 1 is a diagram showing a configuration of an elevator abnormality diagnosis system according to a first embodiment of the present invention. FIG. 2 is a flowchart showing the processing operation on the primary diagnosis apparatus side of the abnormality diagnosis system in the same embodiment. FIG. 3 is a flowchart showing the processing operation on the secondary diagnosis apparatus side of the abnormality diagnosis system in the same embodiment. FIG. 4 is a diagram showing an example of a periodic table provided in the primary diagnosis apparatus of the abnormality diagnosis system in the same embodiment. FIG. 5 is a diagram showing an example of a reference value table provided in the primary diagnosis apparatus of the abnormality diagnosis system in the same embodiment. FIG. 6 is a diagram showing an example of data provided in the secondary diagnosis apparatus of the abnormality diagnosis system in the same embodiment. FIG. 7 is a diagram showing a failure prediction result when the door opening / closing time is taken as an example in the embodiment. FIG. 8 is a diagram showing the configuration of an elevator abnormality diagnosis system according to the second embodiment of the present invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Elevator, 11 ... Main rope, 12 ... Ride car, 13 ... Counterweight, 14 ... Hoisting machine, 15 ... Control panel, 16 ... Tail cord, 20 ... Primary diagnostic device, 21 ... Data collection part, 21a ... Cycle table, 21b ... Cycle change unit, 22 ... Storage unit, 23 ... Diagnostic unit, 23a ... Reference value table, 24 ... Communication unit, 30 ... Secondary diagnostic device, 31 ... Monitoring center, 32 ... Communication unit, 33 ... Diagnosis Part, 34 ... database, 35 ... failure handling part, 10a-10c ... elevator.

Claims (9)

An elevator abnormality diagnosis system comprising a primary diagnosis device provided in an elevator control panel and a secondary diagnosis device provided in a monitoring center connected to the primary diagnosis device via a network,
The primary diagnostic device is
Data collection means for periodically collecting data of each device to be monitored from the control panel;
Storage means for storing data of each device collected by the data collection means;
First diagnostic means for detecting signs of abnormality from the data of each device stored in the storage means;
The data of each device is periodically transmitted to the monitoring center, and when an abnormality sign is detected by the first diagnosis means, the data of the device including the diagnosis result is immediately transmitted. Communication means
The secondary diagnostic device is
A communication means for receiving data of each device from the primary diagnostic apparatus;
A database for storing data of each device received by the communication means;
A second diagnostic means for analyzing a change in the state of each device based on a history of data of each device stored in the database and predicting a time of failure;
An elevator abnormality diagnosis system characterized by comprising failure coping means for performing a predetermined coping process on a device that is determined to have a near failure time by the second diagnosis means.   2. The elevator according to claim 1, wherein the failure coping means adjusts the equipment that is determined not to fail until the next maintenance inspection by the second diagnosis means so that it can cope with the next maintenance inspection. Abnormality diagnosis system.   Even if the failure coping means does not determine that the failure time is near by the second diagnostic means, the equipment for which the first diagnostic means detects an abnormality is to be dealt with at the next maintenance inspection. The elevator abnormality diagnosis system according to claim 1, wherein the abnormality diagnosis system is adjusted.   The failure coping means does not detect any sign of abnormality in the first diagnosis means, but the device in which the sign of abnormality is detected as a result of the second diagnosis means is to respond at the next maintenance inspection. The elevator abnormality diagnosis system according to claim 1, wherein the abnormality diagnosis system is adjusted. The data collection means is
2. The apparatus according to claim 1, further comprising a period table storing data collection periods set for each of the devices, and collecting data at a predetermined period for each of the apparatuses with reference to the period table. Elevator abnormality diagnosis system. The data collection means is
6. The elevator abnormality diagnosis system according to claim 5, further comprising cycle changing means for arbitrarily changing a data collection cycle of each of the devices stored in the cycle table. The data collection means is
The elevator abnormality diagnosis system according to claim 1, wherein a maximum value, a minimum value, an average value, and latest data among a plurality of pieces of data collected at a predetermined cycle are extracted as transmission targets for a specific device. The data collection means is
8. The elevator abnormality diagnosis system according to claim 7, wherein data significantly different from other data among a plurality of data collected at a predetermined cycle is excluded.   The primary diagnostic device is connected to a plurality of elevators installed in the same building, the primary diagnostic processing of each elevator is performed by the primary diagnostic device, and each diagnostic result is transmitted to the monitoring center. The elevator abnormality diagnosis system according to claim 1, wherein the elevator abnormality diagnosis system is provided.

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