Fault detection system and method

Abstract

This invention relates to the field of elevator control technology, and particularly to a fault detection system and method. The fault detection system includes a first group control board, a second group control board, and multiple elevators. The first group control board, the second group control board, and the multiple elevators are all connected via a first communication method. The first group control board and the second group control board are also connected via a second communication method. The first group control board performs group control dispatching tasks to the multiple elevators via the first communication method. The second group control board monitors the status of the first group control board via the first and second communication methods. When the first group control board malfunctions, the second group control board performs the group control dispatching task to the multiple elevators via the first communication method. This invention can solve the passenger congestion problem caused by group control board malfunctions in current elevator group control systems.

Description

Technical Field

[0001] This invention relates to the field of elevator control technology, and in particular to a fault detection system and method. Background Technology

[0002] As a widely used vertical transportation tool, elevators have increasingly higher service quality requirements. To shorten waiting times and reduce energy consumption, multiple elevators need to be installed efficiently. This optimized scheduling system for multiple elevators is called an elevator group control system. If the elevator group control circuit board malfunctions, the elevators in the group control system will enter single-elevator operation mode. In single-elevator operation mode, elevators can only passively respond to external call commands, lacking the efficient dispatching capabilities of the group control system, potentially leading to severe congestion for passengers using the elevators. Summary of the Invention

[0003] The main technical problem solved by the embodiments of the present invention is to provide a fault detection system and method that can solve the problem of passenger congestion caused by the abnormality of the group control board in the current elevator group control system.

[0004] To solve the above-mentioned technical problems, one technical solution adopted in this invention is: providing a fault detection system, the fault detection system comprising: a first group control board, a second group control board, and multiple elevators, wherein the first group control board, the second group control board, and the multiple elevators are all connected via a first communication method, and the first group control board and the second group control board are also connected via a second communication method; the first group control board performs group control elevator dispatching tasks on the multiple elevators via the first communication method; the second group control board monitors the status of the first group control board via the first and second communication methods, and when the first group control board has an abnormality, the second group control board performs the group control elevator dispatching task on the multiple elevators via the first communication method.

[0005] In some embodiments, the fault detection system further includes a communication module connected to the second group control board, which is used to report abnormal conditions of the first group control board to external devices.

[0006] In some embodiments, the second group control board is specifically used to: obtain a first working state of the first group control board through the first communication method, and obtain a second working state of the first group control board through the second communication method; monitor the state of the first group control board according to the first working state and the second working state.

[0007] In some embodiments, both the first working state and the second working state include an online state and an offline state. The second group control board is further configured to: determine that the state of the first group control board is online when at least one of the first working state and the second working state is online; and determine that the state of the first group control board is offline and that the first group control board is abnormal when both the first working state and the second working state are offline.

[0008] In some embodiments, the second group control board is further configured to: acquire first working data of the multiple elevators through the first communication method, and acquire second working data of the multiple elevators through the second communication method; and classify the first group control board for faults based on the status of the first group control board, the first working data, and the second working data.

[0009] In some embodiments, both the first working data and the second working data include working information for each of the plurality of elevators. The working information includes elevator online, elevator offline, and elevator online but unstable. When all the working information in the first working data indicates that the elevator is online, the second group control board is specifically used to: determine that the first group control board has a level three fault when the first group control board is offline and all the working information in the second working data indicates that the elevator is offline; determine that the first group control board has a level two fault when the first group control board is online and some of the working information in the second working data indicates that the elevator is offline; and determine that the first group control board has a level one fault when the first group control board is online and some of the working information in the second working data indicates that the elevator is online but unstable.

[0010] In some embodiments, the second group control board is further configured to: when it is determined that the first group control board has a level 3 fault, the second group control board takes over from the first group control board to perform group control elevator dispatching tasks for the multiple elevators, and reports the abnormal situation of the first group control board to external devices through the communication module; when it is determined that the first group control board has a level 2 fault or a level 1 fault, the first group control board continues to work, and the second group control board reports the abnormal situation of the first group control board to external devices through the communication module.

[0011] To solve the above-mentioned technical problems, another technical solution adopted in the embodiments of the present invention is: to provide a fault detection method, wherein the fault detection method is applied to the fault detection system described above, and the method includes: controlling the first group control board to perform group control elevator dispatching tasks on the multiple elevators through a first communication method; monitoring the status of the first group control board through a first communication method and a second communication method; and when the first group control board is abnormal, controlling the second group control board to perform the group control elevator dispatching tasks on the multiple elevators through the first communication method.

[0012] In some embodiments, monitoring the status of the first group control board through a first communication method and a second communication method includes: obtaining a first working status of the first group control board through the first communication method and obtaining a second working status of the first group control board through the second communication method; and monitoring the status of the first group control board based on the first working status and the second working status.

[0013] In some embodiments, both the first working state and the second working state include an online state and an offline state. Monitoring the state of the first group control board based on the first working state and the second working state includes: determining that the state of the first group control board is online when at least one of the first working state and the second working state is online; and determining that the state of the first group control board is offline and that there is an anomaly in the first group control board when both the first working state and the second working state are offline.

[0014] Unlike related technologies, this invention provides a fault detection system and method. The fault detection system includes a first group control board, a second group control board, and multiple elevators. The first group control board, the second group control board, and the multiple elevators are all connected via a first communication method. The first group control board and the second group control board are also connected via a second communication method. The first group control board performs group control and elevator dispatching tasks on the multiple elevators via the first communication method. The second group control board monitors the status of the first group control board via both the first and second communication methods. When the first group control board malfunctions, the second group control board performs the group control and elevator dispatching task on the multiple elevators via the first communication method. This invention can solve the passenger congestion problem caused by group control board malfunctions in current elevator group control systems. Attached Figure Description

[0015] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0016] Figure 1 This is a schematic diagram of the structure of a fault detection system provided in an embodiment of the present invention;

[0017] Figure 2 This is a flowchart illustrating a fault detection method provided in an embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of a process for monitoring the status of a first group control board through a first communication method and a second communication method, provided in an embodiment of the present invention.

[0019] Figure 4 This is a schematic flowchart of monitoring the status of the first group control board according to the first working state and the second working state provided in an embodiment of the present invention;

[0020] Figure 5 This is a schematic diagram of the process for fault classification of the first group control board provided in an embodiment of the present invention;

[0021] Figure 6 This is a flowchart illustrating the process of classifying the first group control board based on its status, first working data, and second working data, according to an embodiment of the present invention.

[0022] Figure 7 This is a schematic diagram of the fault handling process after fault classification of the first group control board provided by an embodiment of the present invention. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0024] It should be noted that, unless otherwise specified, the various features in the embodiments of the present invention can be combined with each other, and all are within the protection scope of the present invention. Furthermore, although functional modules are divided in the device schematic diagram and a logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different module division or in a different order than that shown in the device schematic diagram or the flowchart.

[0025] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0026] Please see Figure 1 , Figure 1 This is a schematic diagram of a fault detection system provided in an embodiment of the present invention. The fault detection system 100 includes: a first group control board 10, a second group control board 20, and multiple elevators 30. The multiple elevators 30 include elevators 31, 32, 33, and 34. The first group control board 10, the second group control board 20, and the multiple elevators 30 are all connected through a first communication method. The first group control board 10 and the second group control board 20 are also connected through a second communication method.

[0027] The first group control board 10 is used to perform group control and elevator dispatching tasks on multiple elevators 30 through a first communication method. The second group control board 20 is used to monitor the status of the first group control board 10 through the first and second communication methods. When the first group control board 10 is abnormal, the second group control board 20 performs group control and elevator dispatching tasks on multiple elevators 30 through the first communication method.

[0028] The first group control board 10 and the second group control board 20 are both devices used for centralized scheduling and control of elevators in a group-controlled elevator system. A group-controlled elevator is an elevator system in which multiple elevators are arranged in a centralized manner and scheduled and controlled according to a prescribed procedure.

[0029] Each of the 30 elevators can receive its outbound call instructions. Outbound call instructions refer to the up and down button instructions for each floor.

[0030] The first group control board 10 can collect outgoing call commands from each of the multiple elevators 30 via a first communication method. Under normal circumstances, the first group control board 10 will execute the group control elevator dispatching task via the first communication method. The group control elevator dispatching task refers to intelligently calculating based on the outgoing call commands and the status data of each elevator to efficiently dispatch each of the multiple elevators 30 to respond to the outgoing call commands.

[0031] The first communication method can be CAN communication (Controller Area Network) or other communication methods. The second communication method can be RS485 communication (communication using an RS485 interface) or other communication methods.

[0032] It should be noted that the number of elevators in the "30" category is not limited to this. Figure 1 The four parts can be set according to the actual situation.

[0033] In some embodiments, the fault detection system 100 further includes a communication module (not shown), which is connected to the second group control board 20 and is used to report abnormal conditions of the first group control board 10 to external devices.

[0034] The external device can be a mobile phone used by elevator maintenance personnel, or other electronic devices capable of receiving information sent by the communication module. The communication module can be a device that communicates via GSM (Global System for Mobile communications), or other devices capable of sending signals to external devices.

[0035] The second group control board 20 can communicate with the communication module through the following communication methods: RS485 communication, or RS232 communication (communication using an RS232 interface), or other communication methods.

[0036] Specifically, when the second group control board 20 detects an abnormality in the first group control board 10 through the first and second communication methods, it will send information about the abnormality of the first group control board 10 to the electronic equipment of the maintenance personnel through the communication module. This can promptly remind the maintenance personnel to repair or replace the first group control board 10, thus ensuring the stable operation of the elevator group control system.

[0037] In some embodiments, the second group control board 20 is specifically used to: first, obtain the first working state of the first group control board 10 through a first communication method and obtain the second working state of the first group control board 10 through a second communication method; then, monitor the state of the first group control board 10 according to the first working state and the second working state.

[0038] The first working state and the second working state of the first group control board 10 both include an online state and an offline state.

[0039] In some embodiments, the second group control board 20 is further configured to: determine that the state of the first group control board 10 is online when at least one of the first working state and the second working state is online; and determine that the state of the first group control board 10 is offline and that the first group control board 10 is abnormal when both the first working state and the second working state are offline.

[0040] Specifically, if the second group control board 20 obtains that both the first working state and the second working state of the first group control board 10 are online, then the state of the first group control board 10 is determined to be online.

[0041] If the second group control board 20 obtains the first working state of the first group control board 10 as online, but obtains the second working state as offline, then it determines that the first group control board 10 is online, and simultaneously considers the second communication method between the first group control board 10 and the second group control board 20 to have failed. Subsequently, the second group control board 20 can send the fault information of this second communication method failure to the communication module, which then reports it to the external device.

[0042] If the second group control board 20 obtains that the first group control board 10's first operating status is offline, but obtains that its second operating status is online, then it determines that the first group control board 10 is online, and simultaneously considers that the first communication method between the first group control board 10 and the second group control board 20 has failed. Subsequently, the second group control board 20 can send the fault information indicating the failure of the first communication method to the communication module, which then reports it to the external device.

[0043] If the second group control board 20 detects that both the first and second operating states of the first group control board 10 are offline, it determines that the first group control board 10 is malfunctioning. Then, the second group control board 20 can replace the first group control board 10 to perform group control and dispatch tasks for multiple elevators 30. Subsequently, the second group control board 20 can send the information about the first group control board 10's malfunction to the communication module, which then reports it to external devices.

[0044] In some embodiments, the second group control board 20 can also classify the faults of the first group control board 10. Specifically, firstly, first working data of multiple elevators 30 is obtained through a first communication method, and second working data of multiple elevators 30 is obtained through the first group control board 10 through a second communication method. Then, the first group control board 10 is classified into faults based on the status of the first group control board, the first working data, and the second working data.

[0045] In some embodiments, both the first working data and the second working data include working information for each of the multiple elevators. The working information includes whether the elevator is online, offline, or online but unstable. When all the working information in the first working data indicates that the elevator is online, the second group control board 20 is specifically used for:

[0046] When the first group control board 10 is offline and all operational information in the second operational data indicates that the elevator is offline, a level 3 fault is determined to exist in the first group control board 10. When the first group control board 10 is online and some operational information in the second operational data indicates that the elevator is offline, a level 2 fault is determined to exist in the first group control board 10. When the first group control board 10 is online and operational information in the second operational data indicates that the elevator's online status is unstable, a level 1 fault is determined to exist in the first group control board 10. Here, "unstable elevator online status" refers to a situation where the elevator's operational information alternates between "elevator power" and "elevator offline." The cause of a level 1 elevator fault may include poor wiring contact, etc.

[0047] For example, such as Figure 1 As shown, the multiple elevators 30 include four elevators, namely elevator 31, elevator 32, elevator 33 and elevator 34.

[0048] The state of the first group control board 10 obtained by the second group control board 20 can be recorded as A, the state of the first working data obtained by the second group control board 20 can be recorded as B, and the state of the second working data obtained by the second group control board 20 can be recorded as C.

[0049] The case where the first group control board 10 is offline is denoted as A0, and the case where the first group control board 10 is online is denoted as A1. Alternatively, the case where the first group control board 10 is online via the first communication method and offline via the second communication method can be denoted as A10; the case where the first group control board 10 is offline via the first communication method and online via the second communication method can be denoted as A11; and the case where the first group control board 10 is online via both the first and second communication methods can be denoted as A12.

[0050] The working information of elevators 31, 32, 33 and 34 in the first working data is recorded as elevator online as B15.

[0051] In the second working data, the working information for elevators 31, 32, 33, and 34 is recorded as "elevator offline" (C0). The working information for elevators 31, 32, 33, and 34 in the second working data is recorded as "elevator offline," "elevator online," "elevator online," and "elevator online" in sequence (C1). The working information for elevators 31, 32, 33, and 34 in the second working data is recorded as "elevator online," "elevator offline," "elevator online," and "elevator online" in sequence (C2). The working information for elevators 31, 32, 33, and 34 in the second working data is recorded as "elevator online," "elevator online," "elevator offline," and "elevator online" in sequence (C3). The working information for elevators 31, 32, 33, and 34 in the second working data is recorded as "elevator online," "elevator online," "elevator online," and "elevator offline" in sequence (C4). The working information for elevators 31, 32, 33, and 34 in the second working data is recorded as "elevator offline," "elevator offline," "elevator online," and "elevator online" in sequence (C5). The operational information of elevators 31, 32, 33, and 34 in the second working data is recorded as follows: elevator offline, elevator online, elevator offline, elevator online, recorded as C6. The operational information of elevators 31, 32, 33, and 34 in the second working data is recorded as follows: elevator offline, elevator online, elevator online, elevator offline, recorded as C7. The operational information of elevators 31, 32, 33, and 34 in the second working data is recorded as follows: elevator offline, elevator offline, elevator offline, elevator online, elevator offline, recorded as C8. The operational information of elevators 31, 32, 33, and 34 in the second working data is recorded as follows: elevator offline, elevator offline, elevator online, elevator offline, elevator offline, recorded as C9. The operational information of elevators 31, 32, 33, and 34 in the second working data is recorded as follows: elevator offline, elevator online, elevator offline, elevator offline, elevator offline, recorded as C10. The working information of elevators 31, 32, 33, and 34 in the second working data is recorded as follows: elevator online, elevator offline, elevator offline, elevator online, recorded as C11. The working information of elevators 31, 32, 33, and 34 in the second working data is recorded as follows: elevator online, elevator offline, elevator online, elevator offline, recorded as C12. The working information of elevators 31, 32, 33, and 34 in the second working data is recorded as follows: elevator online, elevator offline, elevator offline, elevator offline, recorded as C13. The working information of elevators 31, 32, 33, and 34 in the second working data is recorded as follows: elevator online, elevator online, elevator offline, elevator offline, recorded as C14. The working information of elevators 31, 32, 33, and 34 all being listed as elevator online is recorded as C15.

[0052] If the second group control board 20 obtains A0, B15 and C0, it is considered that the first group control board 10 has a level three fault.

[0053] If the second group control board 20 obtains A1, B15 and C1 (or any one of C2, C3, ..., C14), then the first group control board 10 is considered to have a level two fault.

[0054] If the second group control board 20 obtains A1, B15 and C15, it is considered that the first group control board 10 is not faulty.

[0055] If the second group control board 20 obtains A1 and B15 and there is working information in the second working data indicating that the elevator is unstable online, then the first group control board 10 is considered to have a level one fault.

[0056] In some embodiments, the second group control board 20 is further configured to: when it is determined that the first group control board 10 has a level 3 fault, the second group control board 20 takes over from the first group control board 10 to perform group control and dispatch tasks for multiple elevators 30, and reports the abnormal situation of the first group control board 10 to external devices through the communication module. When it is determined that the first group control board 10 has a level 2 or level 1 fault, the first group control board 10 continues to work, and the second group control board 20 reports the abnormal situation of the first group control board to external devices through the communication module.

[0057] This invention provides a fault detection system 100, which includes a first group control board 10, a second group control board 20, and multiple elevators 30. The first group control board 10, the second group control board 20, and the multiple elevators 30 are all connected via a first communication method. The first group control board 10 and the second group control board 20 are also connected via a second communication method. The first group control board 10 performs group control and elevator dispatching tasks for the multiple elevators 30 via the first communication method. The second group control board 20 monitors the status of the first group control board 10 via both the first and second communication methods. When the first group control board 10 malfunctions, the second group control board 20 performs group control and elevator dispatching tasks in its place, thus solving the passenger congestion problem caused by group control board malfunctions in current elevator group control systems.

[0058] Please see Figure 2 , Figure 2 This is a flowchart illustrating a fault detection method provided in an embodiment of the present invention. The fault detection method is applied to the fault detection system described above, and includes:

[0059] Step S1: Control the first group control board to perform group control and elevator dispatching tasks for multiple elevators through the first communication method.

[0060] Step S2: Monitor the status of the first group control board through the first communication method and the second communication method.

[0061] Step S3: When the first group control board malfunctions, control the second group control board to perform group control elevator dispatching tasks on multiple elevators through the first communication method.

[0062] In some embodiments, please refer to Figure 3 , Figure 3 This is a flowchart illustrating the process of monitoring the status of the first group control board according to an embodiment of the present invention. Monitoring the status of the first group control board through a first communication method and a second communication method includes:

[0063] Step S21: Obtain the first working state of the first group control board through the first communication method, and obtain the second working state of the first group control board through the second communication method.

[0064] Step S22: Monitor the status of the first group control board according to the first working status and the second working status.

[0065] In some embodiments, please refer to Figure 4 , Figure 4 This is a flowchart illustrating the monitoring of the status of a first group control board based on a first working state and a second working state, provided by an embodiment of the present invention. Both the first and second working states include an online state and an offline state. Monitoring the status of the first group control board based on the first and second working states includes:

[0066] Step S221: When at least one of the first working state and the second working state is online, determine that the state of the first group control board is online.

[0067] Step S222: When both the first working state and the second working state are offline, determine that the state of the first group control board is offline and determine that there is an abnormality in the first group control board.

[0068] In some embodiments, please refer to Figure 5 , Figure 5 This is a schematic flowchart illustrating fault classification of the first group control board according to an embodiment of the present invention. The fault detection method further includes:

[0069] Step S223: Obtain first working data of multiple elevators through the first communication method, and obtain second working data of multiple elevators through the second communication method.

[0070] Step S224: Based on the first working data and the second working data, classify the faults of the first group control board.

[0071] In some embodiments, please refer to Figure 6 , Figure 6This is a flowchart illustrating the process of classifying faults in a first group control board based on its status, first working data, and second working data, as provided in an embodiment of the present invention. Both the first and second working data include working information for each elevator in the multiple elevators, including whether the elevator is online, offline, or online but unstable. The fault classification of the first group control board based on its status, first working data, and second working data includes:

[0072] Step S2241: When the first group control board is in an offline state and all the working information in the second working data indicates that the elevator is offline, it is determined that the first group control board has a level three fault.

[0073] Step S2242: When the first group control board is in an online state and some working information in the second working data indicates that the elevator is offline, it is determined that the first group control board has a level two fault.

[0074] Step S2243: When the first group control board is in an online state and the second working data contains working information indicating that the elevator is unstable online, it is determined that the first group control board has a level one fault.

[0075] In some embodiments, please refer to Figure 7 , Figure 7 This is a schematic diagram of the fault handling process after fault classification of the first group control board provided by an embodiment of the present invention. Figure 7 As shown, the fault detection method also includes:

[0076] Step S2244: When it is determined that the first group control board has a level 3 fault, the second group control board takes over the first group control board to perform group control and elevator dispatching tasks for multiple elevators, and reports the abnormal situation of the first group control board to external devices through the communication module.

[0077] Step S2245: When it is determined that the first group control board has a level 2 or level 1 fault, the first group control board continues to work, and the second group control board reports the abnormal situation of the first group control board to the external device through the communication module.

[0078] This invention provides a fault detection method applied to the fault detection system described above. The method first controls a first group control board to perform group control elevator dispatching tasks to multiple elevators via a first communication method. Then, it monitors the status of the first group control board via both the first and second communication methods. Finally, when the first group control board malfunctions, it controls a second group control board to perform group control elevator dispatching tasks to multiple elevators via the first communication method. By monitoring the status of the first group control board and allowing the second group control board to perform the group control elevator dispatching task in its place when the first group control board malfunctions, this invention solves the passenger congestion problem caused by group control board malfunctions in current elevator group control systems.

[0079] It should be noted that the above fault detection method is applied to the fault detection system described above. For technical details not described in detail in the fault detection method embodiments, please refer to the fault detection system provided in the embodiments of the present invention.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; under the concept of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the present invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A fault detection system, characterized in that, include: The system comprises a first group control board, a second group control board, and multiple elevators. The first group control board, the second group control board, and the multiple elevators are all connected via a first communication method. The first group control board and the second group control board are also connected via a second communication method. The first group control board performs group control and elevator dispatching tasks to the multiple elevators through the first communication method; The second group control board monitors the status of the first group control board through the first communication method and the second communication method. When the first group control board is abnormal, the second group control board executes the group control elevator dispatching task for the multiple elevators through the first communication method. The second group control board is specifically used for: obtaining the first working state of the first group control board through the first communication method, and obtaining the second working state of the first group control board through the second communication method; monitoring the state of the first group control board based on the first working state and the second working state, wherein both the first working state and the second working state include an online state and an offline state; the second group control board is also used for: determining that the state of the first group control board is online when at least one of the first working state and the second working state is online; and determining that the state of the first group control board is offline and that there is an abnormality in the first group control board when both the first working state and the second working state are offline. The second group control board is also used to: acquire first working data of the multiple elevators through the first communication method, and acquire second working data of the multiple elevators through the second communication method, and classify the fault of the first group control board according to the status of the first group control board, the first working data and the second working data; Both the first and second working data include working information for each of the multiple elevators. This working information includes whether the elevator is online, offline, or online but unstable. When all working information in the first working data indicates that the elevator is online, the second group control board is specifically used for: determining a level 3 fault in the first group control board when the first group control board is offline and all working information in the second working data indicates that the elevator is offline; determining a level 2 fault in the first group control board when the first group control board is online and some working information in the second working data indicates that the elevator is offline; and determining a level 1 fault in the first group control board when the first group control board is online and some working information in the second working data indicates that the elevator is online but unstable.

2. The system according to claim 1, characterized in that, The fault detection system also includes a communication module, which is connected to the second group control board. The communication module is used to report abnormal conditions of the first group control board to external devices.

3. The system according to claim 2, characterized in that, The second group control board is also used for: When it is determined that the first group control board has the level 3 fault, the second group control board takes over the first group control board to perform group control and elevator dispatching tasks for the multiple elevators, and reports the abnormal situation of the first group control board to external devices through the communication module; When it is determined that the first group control board has a level 2 or level 1 fault, the first group control board continues to work, and the second group control board reports the abnormal situation of the first group control board to the external device through the communication module.

4. A fault detection method, characterized in that, The fault detection method is applied to the fault detection system as described in any one of claims 1-3, and the method includes: The first group control board is controlled to perform group control elevator dispatching tasks to the multiple elevators through a first communication method; Monitoring the status of the first group control board through a first communication method and a second communication method includes: The first working state of the first group control board is obtained through the first communication method, and the second working state of the first group control board is obtained through the second communication method. Monitor the status of the first group control board based on the first working status and the second working status; When the first group control board malfunctions, it controls the second group control board to perform the group control elevator dispatching task on the multiple elevators through the first communication method.

5. The fault detection method according to claim 4, characterized in that, Both the first and second working states include an online state and an offline state. Monitoring the state of the first group control board based on the first and second working states includes: When at least one of the first working state and the second working state is online, the state of the first group control board is determined to be online. When both the first working state and the second working state are offline, it is determined that the state of the first group control board is offline and that there is an abnormality in the first group control board.

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