Fault diagnosis method and fault diagnosis device for elevator doors

Abstract

This disclosure relates to a fault diagnosis method and a fault diagnosis apparatus for elevator doors. The fault diagnosis method includes: obtaining the actual door operation time of an elevator door (10) during elevator operation, the actual door operation time including at least one of the opening duration and closing duration of the elevator door (10); obtaining a reference door operation time, the reference door operation time indicating the normal door operation time of the elevator door (10) under normal conditions corresponding to the door operation during the actual door operation time; and determining, based on the actual door operation time and the reference door operation time, whether there is a potential fault risk in the elevator door (10).

Description

Technical Field

[0001] The embodiments of this disclosure generally relate to fault diagnosis of elevator doors, and particularly to fault diagnosis methods and devices for elevator doors. Background Technology

[0002] One of the most critical incidents in elevator use is when passengers become trapped inside the elevator car and are unable to escape, significantly impacting the passenger experience. A common cause of passengers becoming trapped is elevator door malfunction.

[0003] Many diagnostic methods for elevator door malfunctions have been proposed. For example, Chinese patent CN10500434B discloses an elevator door malfunction detection method that determines whether the elevator has malfunctioned by detecting the frequency conversion data of the variable frequency controller of the door operator system. Another example is Chinese patent CN102862903B, which discloses an elevator door inspection device that controls the speed of the drive motor according to a fixed inspection speed and extracts the actual speed of the drive motor during the opening and closing actions controlled by the door control unit at predetermined sampling intervals. Based on the deviation between the extracted actual speed and the inspection speed, it is determined whether the elevator door has experienced an opening or closing abnormality.

[0004] However, a drawback of the aforementioned fault diagnosis methods is that they are typically applied to situations where the elevator door has already malfunctioned. This means that a passenger could be trapped in an elevator at any time due to a door malfunction. Another drawback is that they generate a lot of noise and are easily affected by irrelevant interference. The aim is to provide a fault diagnosis method that can provide early warning of elevator door malfunctions before they actually occur, thereby preventing passenger entrapment due to elevator door failure. Summary of the Invention

[0005] One of the purposes of this disclosure is to provide a fault diagnosis method and device for elevator doors, which aims to solve or at least alleviate one or more of the above-mentioned technical and / or other potential problems.

[0006] According to a first aspect of this disclosure, a fault diagnosis method for elevator doors is provided. The fault diagnosis method includes: acquiring an actual door operation time of the elevator door during elevator operation, the actual door operation time including at least one of an opening duration and a closing duration of the elevator door; acquiring a reference door operation time, the reference door operation time indicating the normal door operation time of the elevator door under normal conditions corresponding to door operation during the actual door operation time; and determining, based on the actual door operation time and the reference door operation time, whether the elevator door has a potential fault risk.

[0007] In some embodiments, determining whether the elevator door has the potential failure risk includes: making a first comparison between the actual door operation time and the reference door operation time; and marking the elevator floor where the deviation occurs and marking the elevator floor as having the potential failure risk based on a first deviation between the actual door operation time and the reference door operation time exceeding a first predetermined time threshold.

[0008] In some embodiments, the method further includes: based on determining that the elevator door has the potential risk of failure, commanding the elevator to maintain normal operation.

[0009] In some embodiments, the method further includes: based on determining that the potential fault risk exists, commanding the elevator to perform a potential fault confirmation operation at the elevator floor, the potential fault confirmation operation including performing a door operation of the elevator door again at the elevator floor; and based on the potential fault confirmation operation, determining whether to eliminate the potential fault risk.

[0010] In some embodiments, the method further includes: determining whether the elevator is in an idle state based on the determination that the elevator door has the potential fault risk; and, based on the determination that the elevator is in the idle state, commanding the elevator car to travel to the elevator floor and performing the potential fault confirmation operation at the elevator floor.

[0011] In some embodiments, performing the potential fault confirmation operation includes: commanding a cyclic operation of repeatedly performing the opening and closing operations of the elevator door at the elevator floor; wherein, based on statistical processing of the opening and closing durations of the elevator door during the cyclic operation, it is determined whether the potential fault risk has been eliminated.

[0012] In some embodiments, determining whether to eliminate the potential failure risk includes: obtaining a test door operation time of the elevator door during the potential failure confirmation operation, the test door operation time including at least one of the opening duration and closing duration of the elevator door during the potential failure confirmation operation; making a second comparison between the test door operation time and the reference door operation time; and eliminating the potential failure risk based on a second deviation between the test door operation time and the reference door operation time being less than a second predetermined time threshold.

[0013] In some embodiments, the reference gate operation time is updated based on the test gate operation time, based on the second deviation between the test gate operation time and the reference gate operation time being less than a second predetermined time threshold.

[0014] In some embodiments, determining whether to eliminate the potential fault risk further includes: confirming that the elevator door has a potential fault based on the second deviation between the test door operation time and the reference door operation time being greater than the second predetermined time threshold.

[0015] In some embodiments, based on the confirmation that the elevator door has a potential malfunction: marking the elevator as having a potential malfunction risk; and / or generating instructions to maintain the elevator; and / or updating the elevator's health report, including the indication that the elevator door has a potential malfunction.

[0016] According to a second aspect of this disclosure, a fault diagnosis device for elevator doors is provided. The fault diagnosis device includes: an actual door operation time acquisition component configured to acquire the actual door operation time of the elevator door during elevator operation, the actual door operation time including at least one of an opening duration and a closing duration of the elevator door; a reference door operation time acquisition component configured to acquire a reference door operation time, the reference door operation time indicating the normal door operation time of the elevator door in its normal state corresponding to a door operation during the actual door operation time; and judgment logic configured to determine, based on the actual door operation time and the reference door operation time, whether the elevator door has a potential fault risk.

[0017] In some embodiments, the judgment logic is configured to: perform a first comparison between the actual door operation time and the reference door operation time; and, based on the first deviation between the actual door operation time and the reference door operation time exceeding a first predetermined time threshold, mark the elevator floor where the deviation occurs and mark the elevator floor as having the potential fault risk.

[0018] In some embodiments, the judgment logic is further configured to: based on the existence of the potential fault risk, command the elevator to perform a potential fault confirmation operation at the elevator floor, the potential fault confirmation operation including performing an opening and / or closing operation of the elevator door at the elevator floor; and based on the potential fault confirmation operation, determine whether to eliminate the potential fault risk.

[0019] In some embodiments, the judgment logic is further configured to: send an instruction to maintain the normal use of the elevator based on the potential failure risk of the elevator door.

[0020] In some embodiments, the judgment logic is further configured to: determine whether the elevator is in an idle state based on the potential fault risk of the elevator door; and, based on the determination that the elevator is in the idle state, command the elevator car to travel to the elevator floor and perform the potential fault confirmation operation at the elevator floor.

[0021] In some embodiments, the determination logic is configured to: command a cyclic operation of repeatedly performing the opening and closing operations of the elevator door at the elevator floor; and determine whether to eliminate the potential fault risk based on statistical processing of the opening and closing durations during the cyclic operation.

[0022] In some embodiments, the determination logic is configured to: obtain the test door operation time of the elevator door during the potential fault confirmation operation, the test door operation time including at least one of the opening duration and closing duration of the elevator door during the potential fault confirmation operation; perform a second comparison between the test door operation time and the reference door operation time; and eliminate the potential fault risk based on the second deviation between the test door operation time and the reference door operation time being less than a second predetermined time threshold.

[0023] In some embodiments, the determination logic is configured to: store the test gate operation time based on the second deviation between the test gate operation time and the reference gate operation time being less than a second predetermined time threshold, so as to update the reference gate operation time based on the test gate operation time.

[0024] In some embodiments, the judgment logic is configured to: confirm that the elevator door has a potential fault based on the second deviation between the test door operation time and the reference door operation time being greater than the second predetermined time threshold.

[0025] In some embodiments, the determination logic is configured to perform the following actions based on the confirmation that the elevator door has a potential malfunction: mark the elevator as having a safety risk; and / or generate an instruction to maintain the elevator; and / or update the elevator's health report, including an indication that the elevator door has the potential malfunction.

[0026] According to a third aspect of this disclosure, an elevator is provided. The elevator includes: a sensing component configured to detect door operation of an elevator door; at least one processor; and at least one memory storing executable instructions that, when executed by the at least one processor, cause the elevator to perform the method according to any one of the first aspects based on signals from the sensing component.

[0027] According to a fourth aspect of this disclosure, an elevator is provided. The elevator includes: a sensing component configured to detect door operation of an elevator door; and a fault diagnosis device according to any one of the second aspects, the fault diagnosis device being communicatively connected to the sensing component to acquire signals from the sensing component.

[0028] According to the fault diagnosis method and device for elevator doors disclosed herein, it can provide early warning of the fault status of the elevator door before the elevator actually malfunctions. Therefore, a balance can be achieved between early fault warning and the accuracy of fault alarms, avoiding unnecessary dispatching or premature maintenance triggered by premature fault alarms, while also avoiding an increased probability of passenger entrapment due to late fault alarms.

[0029] The fault diagnosis method and fault diagnosis device for elevator doors disclosed herein can also provide one or more of the following technical effects:

[0030] It can provide early warning of elevator malfunctions without relying on controller fault codes that may be too late, reducing the risk of people being trapped due to elevator door malfunctions;

[0031] It can be integrated with, for example, remote diagnostics, making it less susceptible to random cases and ensuring work efficiency when technicians do need to be sent to the site;

[0032] Provides a virtual scheduled maintenance function that generates customer-friendly equipment insights for elevator health reports; and

[0033] By performing secondary confirmation and other procedures, the risks to elevator doors caused by small debris can be eliminated. Attached Figure Description

[0034] The above and other objects, features, and advantages of embodiments of the present disclosure will become readily apparent from the following detailed description taken in conjunction with the accompanying drawings. Several embodiments of the present disclosure are illustrated in the drawings by way of example and not limitation.

[0035] Figure 1 This diagram illustrates the application environment of the fault diagnosis device according to an embodiment of the present disclosure.

[0036] Figure 2 A flowchart illustrating a fault diagnosis method for elevator doors according to an embodiment of the present disclosure is shown;

[0037] Figure 3 A flowchart illustrating a method for secondary verification of potential failure risks according to embodiments of the present disclosure; and Figure 4 A flowchart illustrating a method for determining whether to eliminate a potential failure risk according to an embodiment of this disclosure is shown.

[0038] Throughout the accompanying drawings, identical or similar parts are indicated by the same and similar reference numerals. Detailed Implementation

[0039] Preferred embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.

[0040] The term "comprising" and its variations as used herein signify an open-ended inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "at least partially based on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". Terms such as "upper", "lower", "front", and "rear", indicating placement or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are used only for the purpose of describing the principles of this disclosure, and are not intended to indicate or imply that the elements referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore should not be construed as limiting this disclosure.

[0041] As mentioned earlier, a significant factor contributing to passenger entrapment during elevator use is elevator door malfunction. This can be caused by various factors, such as a faulty door drive system, door deformation, or obstruction by foreign objects. Traditional elevator door fault diagnosis systems typically employ methods like detecting sudden current load increases or vibration patterns. This approach means that fault codes are usually only issued after the elevator malfunction has progressed to the point of stopping or becoming unusable. This implies that intervention for elevator door malfunctions is often reactive, diagnosing a fault only after it has actually occurred or is about to occur. Furthermore, this method is often noisy and susceptible to irrelevant interference, frequently leading to incorrect diagnoses.

[0042] Figure 1 A diagram illustrating the application environment of a fault diagnosis apparatus according to an embodiment of this disclosure is provided. Figure 1 As shown, elevator doors 10 are typically installed on the floors of a building. Elevator doors 10 can be landing doors at building floor openings or elevator car doors. A door actuator may be installed on the car door, which may include, for example, a motor and a transmission device such as a pulley drive. When the door actuator receives an open or close command from the door controller, it drives the car door to open or close. The car door may be equipped with a door coupler, which engages with the landing door at a predetermined position, thereby allowing the landing door to open and close synchronously when the car door opens and closes. Thus, the landing door and the car door can open and close synchronously.

[0043] One of the most critical incidents in elevator operation is when passengers become trapped inside the elevator car and are unable to escape, significantly impacting the passenger experience. A common cause of passenger entrapment is elevator door malfunction. The main causes of door malfunctions include misalignment of the door coupler and blockage of the sill. These malfunctions are partly due to factors such as aging or excessive wear of the door drive system, and partly due to accidental falling foreign objects or malicious acts by elevator users.

[0044] Based on extensive statistical data analysis of door operation in trapped and untrapped random cases, the inventors of this application discovered that the probability of abnormal door operation time in trapped cases is 5 times higher than in untrapped random cases. This means that abnormal parameters of door operation, especially the abnormality of its door operation time, can be used for door fault diagnosis and / or early warning. According to this disclosure, a method and apparatus for realizing door fault early warning and / or diagnosis based on door operation time (especially opening duration, closing duration, or combinations thereof) are proposed.

[0045] This disclosure provides a fault diagnosis method and device for elevator doors, which can provide early warning of the elevator door's fault status before the elevator actually malfunctions. This achieves a balance between early fault warning and the accuracy of fault alarms, avoiding unnecessary dispatching or premature maintenance due to premature fault alarms, while also preventing increased probability of passenger entrapment due to late fault alarms.

[0046] like Figure 1 As shown, the elevator may further include: a sensing component 20 configured to detect door operation of the elevator door 10; and a fault diagnosis device 30 communicatively connected to the sensing component 20 to acquire signals from the sensing component 20 and to perform fault diagnosis based on the signals from the sensing component 20. The fault diagnosis device 30 may include a processor with computing capabilities and a memory. The memory may store executable instructions that, when executed by the processor, cause the elevator to perform a fault diagnosis method according to embodiments of this disclosure based on signals from the sensing component 20. In some embodiments, the fault diagnosis device 30 may be implemented as a separate modular unit. In some embodiments, the fault diagnosis device 30 may be integrated into the elevator's controller.

[0047] Figure 2 A flowchart illustrating a fault diagnosis method 200 for elevator doors according to an embodiment of the present disclosure is shown. The fault diagnosis method 200 can be performed by a fault diagnosis device 30. Figure 2As shown, at position 202, the actual door operation time of elevator door 10 during elevator operation is obtained. The actual door operation time may correspond to the door operation time during normal elevator operation. The actual door operation time may include at least one of the opening duration and closing duration of elevator door 10. The opening duration may correspond to the time from when the elevator door receives an opening command to when the door is fully open (i.e., fully open), and the closing duration may correspond to the time from when the elevator door receives a closing command to when the door is fully closed (i.e., fully closed). In some embodiments, the actual door operation time may be the opening duration; in some embodiments, the actual door operation time may be the closing duration; in some embodiments, the actual door operation time may be the sum of both.

[0048] At position 204, the reference door operation time is obtained. The reference door operation time indicates the normal door operation time of elevator door 10 in its normal state (i.e., healthy state) corresponding to the door operation during the door operation time period. Thus, the reference door operation time can indicate the door operation time of the elevator door in a healthy state. This reference door operation time can be determined, for example, based on experience and / or actual operating parameters in the normal state of the elevator door. This data can be pre-stored in memory and can be retrieved as needed.

[0049] At point 206, based on the actual door operation time and the reference door operation time, it is determined whether there is a potential risk of failure for elevator door 10. Therefore, the presence of potential failure risks can be determined by checking for anomalies in the actual door operation time. By identifying potential failures, elevator door malfunctions can be detected at an early stage, effectively preventing reactive elevator maintenance. Maintenance performed after a malfunction inevitably lowers user evaluation and the overall user experience. Further reference Figure 1 ,like Figure 1 As shown, a sensing component 20 may be provided. The sensing component 20 may be configured to detect door operation information of the elevator door 10, which can be used to determine the door operation time, such as the opening duration, closing duration, etc. The sensing component 20 may be implemented in any suitable form, as long as it can provide information on door operation. In some embodiments, the sensing component 20 may be in the form of a door position sensor, a contact switch, or the like, capable of determining whether the door has reached a predetermined position. The door operation time can be conveniently determined based on the time it takes for the elevator door to reach the predetermined position. In this case, the invention can be implemented using components already present in the elevator itself for detecting whether the elevator door is open or closed. In some embodiments, considering that the determination of the door operation time depends on the "open" command signal and the signal that the elevator door has reached the predetermined position, door opening and closing duration information is easily collected even in older elevator systems, thus facilitating the implementation of the invention. According to this disclosure, door opening and closing duration data can be captured whenever the car travels to a floor. This allows analysts to accurately locate potential anomalies at the floor level.

[0050] In some embodiments, by comparing the actual door operation time with a reference door operation time, if the deviation between the actual door operation time and the reference door operation time exceeds a first predetermined time threshold, the elevator floor with the deviation is marked and the elevator floor is marked as having a potential malfunction risk. The first predetermined time threshold may correspond to an outlier value that indicates an early malfunction in door operation but does not affect normal use; this value can be determined, for example, based on empirical data or statistical processing. When the deviation between the actual door operation time and the reference door operation time exceeds the first predetermined time threshold, it may mean that the elevator door operation is abnormal.

[0051] In some embodiments, the method further includes the following step. At 208, based on the potential risk of failure of elevator door 10, the elevator is ordered to maintain normal operation. Although the door operation time of elevator door 10 is abnormal, elevator door 10 can still successfully close and open. This means that the elevator is still operating normally and has not yet reached a state requiring immediate maintenance. According to the method of this disclosure, it can be implemented during normal elevator use and before a entrapment event as described above occurs.

[0052] In some embodiments, the method further includes the following steps. At 210, based on the existence of a potential failure risk, the elevator is commanded to perform a potential failure confirmation operation at the elevator floor, the potential failure confirmation operation including performing a door operation of the elevator door 10 again at the elevator floor. At 212, based on the potential failure confirmation operation, it is determined whether the potential failure risk has been eliminated.

[0053] The deviation obtained by comparing the actual door operation time with the reference door operation time does not always indicate that the elevator door is in a fault condition requiring maintenance. This is because there are various reasons for abnormal door operation times. These abnormalities may be caused by factors such as aging or excessive wear of the door drive system, or by accidental falling foreign objects or pranks by elevator users. Regardless of the cause, these failure modes can cause the door opening and closing duration to deviate from the nominal value.

[0054] According to this disclosure, by performing a potential fault confirmation operation, situations where abnormal door operation might be caused by random transient factors (such as obstruction by foreign objects, user mischief, etc.) can be effectively ruled out, further improving the accuracy of fault warnings. For example, a small piece of debris on the sill might prevent the door from opening fully, while the subsequent closing action forces the debris into the sill groove. Such transient anomalies do not pose a sustained risk of entrapment and should be excluded from risk assessment.

[0055] Figure 3 A flowchart of a method 300 for secondary verification of potential fault risks according to an embodiment of this disclosure is shown. At 302, based on the determination that there is a potential fault risk in elevator door 10, it is determined whether the elevator is in an idle state. At 304, based on the determination that the elevator is in an idle state, the elevator car is ordered to travel to the elevator floor, and a potential fault verification operation is performed at the elevator floor. In this way, secondary verification of potential faults can be performed outside of peak elevator usage periods.

[0056] In some embodiments, elevator idle time windows can be determined based on experience or statistical processing. These idle time windows can avoid peak elevator hours, and potential fault confirmation operations can be performed within these idle time windows. In some embodiments, actual elevator load information and elevator call events are used to determine whether the elevator is actually unused, allowing potential fault confirmation operations to be performed under idle conditions. This minimizes the impact on normal elevator service.

[0057] In some embodiments, once it is confirmed that the elevator is not idle, the secondary verification of potential faults can be delayed. For example, the system may include a delay timer, and after a predetermined time set by the delay timer, re-verify whether the elevator is idle. The secondary verification of potential faults is then performed after the elevator is confirmed to be idle.

[0058] In some embodiments, performing a potential fault confirmation operation includes: commanding a cyclical operation of repeatedly opening and closing the elevator door 10 at the elevator floor; wherein, based on statistical processing of the opening and closing durations of the elevator door 10 during the cyclic operation, it is determined whether the potential fault risk has been eliminated. By repeatedly performing this operation, the accuracy of potential fault confirmation can be further improved. Furthermore, in cases where the abnormal door operation time is caused by foreign objects (such as small debris) blocking the sill, this repeated active opening and closing operation can effectively push the debris across the gap in the door sill, thereby effectively eliminating this potential fault.

[0059] After confirming that the elevator is idle, the elevator can be driven to the floor where the potential fault occurred and a secondary confirmation of the potential fault can be performed at that floor to finally determine whether the potential fault risk has been eliminated and / or to record the potential fault risk and perform the corresponding reporting operation.

[0060] Figure 4 A flowchart illustrating a method 400 for determining whether a potential fault risk has been eliminated according to an embodiment of the present disclosure is shown. In some embodiments, determining whether a potential fault risk has been eliminated may include the following actions: At 402, a test door operation time of the elevator door 10 is obtained during a potential fault confirmation operation, the test door operation time including at least one of the opening duration and closing duration of the elevator door 10 during the potential fault confirmation operation. At 404, a second comparison is made between the test door operation time and a reference door operation time. At 406, the potential fault risk is eliminated based on the fact that a second deviation between the test door operation time and the reference door operation time is less than a second predetermined time threshold.

[0061] The second predetermined time threshold can correspond to a reasonable deviation value relative to the reference door operation time. This value can be determined, for example, based on empirical data or statistical processing. When the deviation between the test door operation time and the reference door operation time is less than the second predetermined time threshold, such as a deviation of 0 or a very small value, it may mean that the elevator door operation time is within a reasonable deviation range and the elevator door is in a normal state.

[0062] In some embodiments, a potential fault in elevator door 10 is confirmed based on a second deviation between the test door operation time and the reference door operation time exceeding a second predetermined time threshold. In this case, it means that elevator door 10 may indeed have an early fault.

[0063] In some embodiments, once a potential malfunction of elevator door 10 is confirmed, a safety risk is flagged for the elevator. For example, a risk of people being trapped in the elevator can be flagged, prompting elevator users and / or maintenance personnel to pay closer attention to the elevator. These flagged safety risks provide a basis for subsequent elevator maintenance work. In some embodiments, maintenance instructions for the elevator are generated. This can be used in scenarios with high safety requirements, allowing for early intervention against potential malfunctions. In some embodiments, a health report for the elevator, including an indication of a potential malfunction of elevator door 10, is updated. This allows early malfunction status of the elevator to be promptly provided to users. In particular, anomalies in door operation times can be included in the user-facing elevator health report, enabling users to be informed of the elevator's health status in a timely manner and to develop appropriate maintenance plans.

[0064] In some embodiments, the reference door operation time can be updated based on the test door operation time, provided that the second deviation between the test door operation time and the reference door operation time is less than a second predetermined time threshold. Thus, the reference door operation time can be updated in a timely manner to reflect the actual condition of the elevator.

[0065] According to this disclosure, a fault diagnosis device for elevator door 10 is also provided. Reference is also made to... Figure 1 ,like Figure 1 As shown, the fault diagnosis device 30 includes: an actual door operation time acquisition component 32, configured to acquire the actual door operation time of the elevator door 10 during elevator operation, the actual door operation time including at least one of the opening duration and closing duration of the elevator door 10; a reference door operation time acquisition component 34, configured to acquire a reference door operation time, the reference door operation time indicating the normal door operation time of the elevator door 10 in the normal state of the elevator corresponding to the door operation during the actual door operation time; and a judgment logic 36, configured to determine whether there is a potential fault risk in the elevator door 10 based on the actual door operation time and the reference door operation time.

[0066] In some embodiments, the determination logic 36 is configured to: perform a first comparison between the actual door operation time and the reference door operation time; mark the elevator floor where the deviation occurs and mark the elevator floor as having a potential fault risk based on a first deviation between the actual door operation time and the reference door operation time exceeding a first predetermined time threshold; based on the existence of a potential fault risk, command the elevator to perform a potential fault confirmation operation at the elevator floor, the potential fault confirmation operation including performing an opening operation and / or closing operation of the elevator door 10 at the elevator floor; and based on the potential fault confirmation operation, determine whether to eliminate the potential fault risk.

[0067] In some embodiments, the judgment logic 36 is further configured to: send an instruction to maintain normal elevator operation based on the potential failure risk of elevator door 10.

[0068] In some embodiments, the judgment logic 36 is further configured to: determine whether the elevator is in an idle state based on the potential fault risk of the elevator door 10; and, based on the determination that the elevator is in an idle state, command the elevator car to travel to the elevator floor and perform a potential fault confirmation operation at the elevator floor.

[0069] In some embodiments, the judgment logic 36 is configured to: command a cyclic operation of repeatedly performing the opening and closing operations of the elevator door 10 at the elevator floor; and determine whether to eliminate potential fault risks based on statistical processing of the opening and closing durations during the cyclic operation.

[0070] In some embodiments, the determination logic 36 is configured to: obtain the test door operation time of the elevator door 10 during the potential fault confirmation operation, the test door operation time including at least one of the opening duration and closing duration of the elevator door 10 during the potential fault confirmation operation; make a second comparison between the test door operation time and the reference door operation time; and eliminate the potential fault risk based on the second deviation between the test door operation time and the reference door operation time being less than a second predetermined time threshold.

[0071] In some embodiments, the determination logic 36 is configured to: store the test gate operation time based on the second deviation between the test gate operation time and the reference gate operation time being less than a second predetermined time threshold, so as to update the reference gate operation time based on the test gate operation time.

[0072] In some embodiments, the judgment logic 36 is configured to: confirm that there is a potential fault in the elevator door 10 based on the second deviation between the test door operation time and the reference door operation time being greater than a second predetermined time threshold.

[0073] In some embodiments, the determination logic 36 is configured to perform the following actions based on the confirmation that there is a potential malfunction in the elevator door 10: mark the elevator as having a safety risk; and / or generate an instruction to maintain the elevator; and / or update the elevator's health report, including the indication that there is a potential malfunction in the elevator door 10.

[0074] According to this disclosure, an elevator is also provided, comprising: a sensing component 20 configured to detect door operation of an elevator door 10; at least one processor; and at least one memory storing executable instructions that, when executed by the at least one processor, cause the elevator to perform a method according to any one of the embodiments of this disclosure based on a signal from the sensing component 20.

[0075] According to this disclosure, an elevator is also provided, including: a sensing component 20 configured to detect door operation of an elevator door 10; and a fault diagnosis device according to any embodiment of this disclosure, the fault diagnosis device being communicatively connected to the sensing component 20 to obtain signals from the sensing component 20.

[0076] According to this disclosure, early warnings of elevator malfunctions can be provided without relying on controller fault codes that may be too late, reducing the risk of people being trapped due to elevator door malfunctions; it can be integrated with, for example, remote diagnostics, making it less susceptible to random cases and ensuring work efficiency when technicians do need to be dispatched to the site; it provides a virtual periodic maintenance that can generate customer-friendly equipment insights for elevator health reports; and it can eliminate elevator door risks caused by small debris through operations such as secondary confirmation.

[0077] According to this disclosure, the logical functions described above herein can be performed at least in part by one or more hardware logic components. For example, exemplary types of hardware logic components that can be used, without limitation, include: field programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload programmable logic devices (CPLDs), and so on.

[0078] Although the operations are described in a specific order, this should be understood as requiring that such operations be performed in the specific order shown or in sequential order, or requiring that all illustrated operations be performed to achieve the desired result. In certain environments, multitasking and parallel processing may be advantageous. Similarly, while several specific implementation details are included in the above discussion, these should not be construed as limiting the scope of this disclosure. Certain features described in the context of individual embodiments may also be implemented in combination in a single implementation. Conversely, various features described in the context of a single implementation may also be implemented individually or in any suitable sub-combination in multiple implementations.

[0079] Although the subject matter has been described using language specific to structural features and / or methodological logic, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. Rather, the specific features and actions described above are merely illustrative examples of implementing the claims.

[0080] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A fault diagnosis method for an elevator door (10), comprising: Obtain the actual door operation time of the elevator door (10) during elevator operation, the actual door operation time including at least one of the opening duration and closing duration of the elevator door (10); Obtain a reference door operation time, the reference door operation time indicating the normal door operation time of the elevator door (10) under normal conditions corresponding to the door operation during the actual door operation time; and Based on the actual door operation time and the reference door operation time, determine whether the elevator door (10) has potential failure risks.

2. The fault diagnosis method according to claim 1, wherein determining whether the elevator door (10) has the potential fault risk includes: The actual door operation time is compared with the reference door operation time in the first comparison. Based on the first deviation between the actual door operation time and the reference door operation time exceeding a first predetermined time threshold, the elevator floor where the deviation occurred is marked and the elevator floor is marked as having the potential fault risk.

3. The fault diagnosis method according to claim 1 further includes: Based on the determination that the elevator door (10) has the potential risk of failure, the elevator is ordered to maintain normal operation.

4. The fault diagnosis method according to claim 1 further includes: Based on the determination of the potential failure risk, the elevator is ordered to perform a potential failure confirmation operation at the elevator floor, the potential failure confirmation operation including performing the door operation of the elevator door (10) again at the elevator floor; and Based on the potential fault confirmation operation, it is determined whether the potential fault risk should be eliminated.

5. The fault diagnosis method according to claim 4 further includes: Based on the determination that the elevator door (10) has the potential failure risk, determine whether the elevator is in an idle state; as well as Based on the determination that the elevator is in the idle state, the elevator car is ordered to travel to the elevator floor and the potential fault confirmation operation is performed at the elevator floor.

6. The fault diagnosis method according to claim 5, wherein performing the potential fault confirmation operation includes: The command executes a cyclic operation of opening and closing the elevator door (10) multiple times at the elevator floor; The determination of whether the potential failure risk is eliminated is based on statistical processing of the opening and closing durations of the elevator door (10) during the cyclic operation.

7. The fault diagnosis method according to claim 4, wherein determining whether to eliminate the potential fault risk includes: The test door operation time of the elevator door (10) during the potential fault confirmation operation is obtained, the test door operation time including at least one of the opening duration and closing duration of the elevator door (10) during the potential fault confirmation operation; A second comparison is made between the test door operation time and the reference door operation time; and The potential failure risk is eliminated based on the fact that the second deviation between the test door operation time and the reference door operation time is less than a second predetermined time threshold.

8. The fault diagnosis method according to claim 7, wherein the reference door operation time is updated based on the test door operation time, based on the second deviation between the test door operation time and the reference door operation time being less than a second predetermined time threshold.

9. The fault diagnosis method according to claim 7, wherein determining whether to eliminate the potential fault risk further includes: Based on the fact that the second deviation between the test door operation time and the benchmark door operation time is greater than the second predetermined time threshold, it is confirmed that the elevator door (10) has a potential fault.

10. The fault diagnosis method according to any one of claims 1-3 and 6-9, wherein the fault is confirmed to exist in the elevator door (10): The elevator is marked as having the potential failure risk; and / or Generate instructions for maintaining the elevator; and / or Update the elevator with a health report indicating that the elevator door (10) has the potential malfunction.

11. A fault diagnosis device for an elevator door (10), comprising: The actual door operation time acquisition component (32) is configured to acquire the actual door operation time of the elevator door (10) during elevator operation, the actual door operation time including at least one of the opening duration and closing duration of the elevator door (10); The reference door operation time acquisition component (34) is configured to acquire a reference door operation time, which indicates the normal door operation time of the elevator door (10) in the normal state of the elevator door (10) corresponding to the door operation during the actual door operation time. as well as The judgment logic (36) is configured to determine whether there is a potential fault risk in the elevator door (10) based on the actual door operation time and the reference door operation time.

12. The fault diagnosis device according to claim 10, wherein the judgment logic (36) is configured as follows: A first comparison is made between the actual door operation time and the reference door operation time; and Based on the first deviation between the actual door operation time and the reference door operation time exceeding a first predetermined time threshold, the elevator floor where the deviation occurred is marked and the elevator floor is marked as having the potential fault risk.

13. The fault diagnosis device according to claim 12, wherein the judgment logic (36) is further configured to: Based on the existence of the aforementioned potential failure risk, the elevator is instructed to perform a potential failure confirmation operation at the elevator floor, the potential failure confirmation operation including performing an opening and / or closing operation of the elevator door (10) at the elevator floor; and Based on the potential fault confirmation operation, it is determined whether the potential fault risk should be eliminated.

14. The fault diagnosis device according to any one of claims 11-13, wherein the judgment logic (36) is further configured to: send an instruction to maintain the normal use of the elevator based on the existence of the potential fault risk of the elevator door (10).

15. The fault diagnosis apparatus according to any one of claims 11-13, wherein the judgment logic (36) is further configured to: Based on the potential malfunction risk of the elevator door (10), determine whether the elevator is in an idle state; and Based on the determination that the elevator is in the idle state, the elevator car is ordered to travel to the elevator floor and the potential fault confirmation operation is performed at the elevator floor.

16. The fault diagnosis device according to claim 13, wherein the judgment logic (36) is configured to: command a cyclic operation of repeatedly performing the opening and closing operations of the elevator door (10) at the elevator floor; and Based on statistical processing of the door opening and closing durations during the cyclic operation, it is determined whether the potential failure risk has been eliminated.

17. The fault diagnosis device according to claim 13, wherein the judgment logic (36) is configured as follows: The test door operation time of the elevator door (10) during the potential fault confirmation operation is obtained, the test door operation time including at least one of the opening duration and closing duration of the elevator door (10) during the potential fault confirmation operation; A second comparison is made between the test door operation time and the reference door operation time; and The potential failure risk is eliminated based on the fact that the second deviation between the test door operation time and the reference door operation time is less than a second predetermined time threshold.

18. The fault diagnosis device according to claim 17, wherein the judgment logic (36) is configured to: store the test gate operation time based on the second deviation between the test gate operation time and the reference gate operation time being less than a second predetermined time threshold, so as to update the reference gate operation time based on the test gate operation time.

19. The fault diagnosis method according to claim 17, wherein the judgment logic (36) is configured to: confirm that the elevator door (10) has a potential fault based on the second deviation between the test door operation time and the reference door operation time being greater than the second predetermined time threshold.

20. The fault diagnosis device according to any one of claims 11-13, 15-19, wherein the judgment logic (36) is configured to perform the following action based on the confirmation that the elevator door (10) has a potential fault: Marking the elevator as having a safety risk; and / or generating instructions for maintaining the elevator; and / or Update the elevator with a health report indicating that the elevator door (10) has the potential malfunction.

21. An elevator, comprising: The sensing component (20) is configured to detect door operation of the elevator door (10) of the elevator; At least one processor; as well as At least one memory stores executable instructions that, when executed by the at least one processor, cause the elevator to perform the method according to any one of claims 1-10 based on a signal from the sensing component (20).

22. An elevator, comprising: The sensing component (20) is configured to detect door operation of the elevator door (10) of the elevator; as well as The fault diagnosis device according to any one of claims 11-20 is communicatively connected to the sensing component (20) to obtain signals from the sensing component (20).

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