Elevator cage door failure detection method, failure detection device, and elevator

Abstract

The application provides an elevator cage door fault detection method, a fault detection device and an elevator. The fault detection method comprises the following steps: receiving an opening and closing instruction and controlling a cage door lifting mechanism to execute the opening and closing instruction; detecting the real-time torque of a driving motor in the cage door lifting mechanism; determining whether the elevator cage door has an operation fault according to the real-time torque; and controlling the cage door lifting mechanism to stop executing the opening and closing instruction in the case that the elevator cage door has an operation fault. After the cage door lifting mechanism starts to start and execute the opening and closing instruction, whether the elevator cage door has a jamming fault can be determined by detecting the real-time torque of the driving motor and judging the real-time torque, so that automatic identification of the jamming fault of the elevator cage door is realized. In addition, in the case that the jamming fault of the elevator cage door is determined, the cage door lifting mechanism can also be automatically controlled to stop the driving of the current instruction, and corresponding processing is performed, thereby achieving the purpose of eliminating safety hazards.

Description

Technical Field

[0001] This invention belongs to the field of construction hoist technology, specifically relating to a method for detecting hoist cage door faults, a fault detection device, and a hoist. Background Technology

[0002] Construction hoists, as transportation equipment for carrying personnel and goods, are widely used in the construction industry. Most construction hoists use a chain lifting mechanism to drive the hoist cage door to open and close. In the chain lifting mechanism, one end of the chain is connected to the hoist cage door, and the other end is connected to a counterweight. The drive motor in the chain hoist controls the chain to move, thereby raising or lowering the hoist cage door. Due to the harsh working environment of construction hoists, the cage door is prone to jamming during opening and closing due to external mechanical hardware getting stuck or deformation of its own mechanical structure. However, there are currently no detection methods to identify these faults. Even if the cage door is jammed, the chain lifting mechanism may still be in normal working condition, requiring manual intervention for emergency stopping, which can easily lead to safety hazards. Summary of the Invention

[0003] To address the aforementioned deficiencies or shortcomings, this invention provides a method, device, processor, and elevator for detecting cage door malfunctions, aiming to solve the technical problem that the lack of detection methods for identifying cage door jamming malfunctions can easily lead to safety hazards.

[0004] To achieve the above objectives, the first aspect of the present invention provides a method for detecting faults in a hoist cage door, wherein the hoist cage door is opened and closed under the drive of a cage door lifting mechanism, and the hoist cage door fault detection method includes:

[0005] Receive opening and closing commands and control the cage door lifting mechanism to execute the opening and closing commands, wherein the opening and closing commands include opening commands and closing commands;

[0006] The real-time torque of the drive motor in the cage door lifting mechanism is detected;

[0007] Determine whether the elevator cage door has a malfunction based on the real-time torque.

[0008] In the event of a malfunction in the cage door of the elevator, the control mechanism for lifting the cage door will stop executing opening and closing commands.

[0009] In this embodiment of the invention, detecting the real-time torque of the drive motor in the cage door lifting mechanism includes:

[0010] When the cage door of the elevator is in a constant speed operation phase, the real-time torque of the drive motor in the cage door elevator is detected.

[0011] In this embodiment of the invention, the elevator cage door fault detection method further includes:

[0012] The running time of the cage door lifting mechanism executing opening and closing commands is timed;

[0013] If the cage door lifting mechanism exceeds the time limit for executing the opening and closing command, it is determined that the cage door of the elevator has malfunctioned.

[0014] In this embodiment of the invention, determining that the cage door of the elevator has malfunctioned when the running time for executing the opening and closing command of the cage door lifting mechanism exceeds the specified time includes:

[0015] When the cage door of the elevator has completed the uniform speed operation phase, the running time of the cage door lifting mechanism executing the opening and closing command is judged to exceed the time limit.

[0016] If the timeout is detected, it is determined that the elevator cage door has malfunctioned.

[0017] In this embodiment of the invention, when the elevator cage door has completed the uniform speed operation phase, the timeout determination of the running time for the cage door lifting mechanism to execute the opening and closing command includes:

[0018] When the elevator cage door has completed the uniform speed operation phase, receive the position monitoring information of the elevator cage door;

[0019] If the location monitoring information determines that the end opening / closing command has not been triggered, the running time of the cage door lifting mechanism executing the opening / closing command is judged to have exceeded the time limit.

[0020] In this embodiment of the invention, timing the running time of the cage door lifting mechanism executing the opening and closing command includes:

[0021] The running time of the cage door lifting mechanism in executing opening and closing commands is timed based on the number of pulses from the drive motor.

[0022] In this embodiment of the invention, when a malfunction occurs in the cage door of the elevator, controlling the cage door lifting mechanism to stop executing opening and closing commands includes:

[0023] If a closing command is executed and the cage door of the elevator malfunctions, the cage door lifting mechanism will stop executing the closing command and execute the zero-return opening command.

[0024] In this embodiment of the invention, determining whether the elevator cage door has experienced a malfunction based on the real-time torque includes:

[0025] If the real-time torque obtained from multiple consecutive tests exceeds the preset torque, it is determined that the elevator cage door has a malfunction.

[0026] To achieve the above objectives, a second aspect of the present invention provides a processor, wherein the processor is configured to execute the elevator cage door fault detection method described above.

[0027] To achieve the above objectives, a third aspect of the present invention provides a fault detection device for a lift cage door, wherein the lift cage door fault detection device includes a lift cage door, a cage door lifting mechanism, and a processor according to the above description.

[0028] To achieve the above objectives, a fourth aspect of the present invention provides an elevator, wherein the elevator includes the elevator cage door fault detection device according to the above description.

[0029] In the above technical solution, when the elevator cage door is normally lifting and lowering, the rotation of the drive motor mainly does work to overcome friction due to the presence of the counterweight, resulting in a relatively small torque. However, if the elevator cage door jams, the chain segment connected to the elevator cage door will loosen, and the drive motor will drive the counterweight to rotate independently, causing a significant increase in torque. Therefore, after the cage door lifting mechanism starts and executes the opening and closing command, the real-time torque of the drive motor can be detected, and the jamming fault of the elevator cage door can be determined based on the real-time torque. This enables automatic identification of the jamming fault of the elevator cage door. Furthermore, if the jamming fault of the elevator cage door is determined, the cage door lifting mechanism can be automatically controlled to stop the current command drive, thereby eliminating safety hazards.

[0030] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0031] The accompanying drawings are provided to further illustrate embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. Those skilled in the art can obtain other drawings based on the structures shown in these drawings without any inventive effort. In the drawings:

[0032] Figure 1 The schematic diagram illustrates a flowchart of a method for detecting elevator cage door faults in one embodiment of the present invention;

[0033] Figure 2 The schematic diagram illustrates a fault detection method for a lift cage door during the opening process according to another embodiment of the present invention.

[0034] Figure 3 The schematic diagram illustrates a fault detection method for a lift cage door during the closing process according to another embodiment of the present invention. Detailed Implementation

[0035] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0036] Figure 1 The illustration shows a schematic flowchart of a method for detecting elevator cage door malfunctions according to an embodiment of the present invention. Figure 1 As shown, the first aspect of the present invention provides a method for detecting faults in a hoist cage door, wherein the hoist cage door is opened and closed under the drive of a cage door lifting mechanism. Taking the application of this fault detection method to a processor as an example, the fault detection method may include the following steps:

[0037] Step S100: Receive opening and closing instructions and control the cage door lifting mechanism to execute the opening and closing instructions, wherein the opening and closing instructions include opening instructions and closing instructions.

[0038] Understandably, the opening and closing commands can be issued by personnel using a remote control or remote control platform, or directly by the intelligent controller in the unmanned elevator according to the set program. Upon receiving the opening command, the controller controls the cage door lifting mechanism to raise the elevator cage door to open the elevator cage. Upon receiving the closing command, the controller controls the cage door lifting mechanism to lower the elevator cage door to close the elevator cage.

[0039] Step S110: Detect the real-time torque of the drive motor in the cage door lifting mechanism.

[0040] Specifically, the real-time torque of the drive motor can be detected by monitoring its real-time current and then calculating the real-time torque based on the real-time current. However, this invention is not limited to this; a torque sensor can also be added to the drive motor to detect its real-time torque.

[0041] Step S120: Determine whether the elevator cage door has a malfunction based on the real-time torque.

[0042] Furthermore, the detected real-time torque can be compared with the maximum torque threshold during normal operation. When the detected real-time torque is significantly greater than the normal operating torque, it can be considered that the elevator cage door is stuck. When the detected real-time torque is within the normal operating range, it can be considered that the elevator cage door is operating normally.

[0043] Step S130: In the event of a malfunction in the cage door of the elevator, control the cage door lifting mechanism to stop executing the opening and closing commands.

[0044] In the above technical solution, when the elevator cage door is normally lifting and lowering, the rotation of the drive motor mainly does work to overcome friction due to the presence of the counterweight, resulting in a relatively small torque. However, if the elevator cage door jams, the chain segment connected to the elevator cage door will loosen, and the drive motor will drive the counterweight to rotate independently, causing a significant increase in torque. Therefore, after the cage door lifting mechanism starts and executes the opening and closing command, the real-time torque of the drive motor can be detected, and the jamming fault of the elevator cage door can be determined based on the real-time torque. This enables automatic identification of the jamming fault of the elevator cage door. Furthermore, if the jamming fault of the elevator cage door is determined, the cage door lifting mechanism can be automatically controlled to stop the current command drive, thereby eliminating safety hazards.

[0045] Upon receiving an opening command, the cage door lifting mechanism is controlled to raise the cage door to open the cage. During this process, the real-time torque of the drive motor of the cage door lifting mechanism is detected, and the cage door is judged to be stuck based on the detected real-time torque. If the real-time torque is significantly greater than the normal operating torque, it is determined that the cage door is stuck, and the cage door lifting mechanism is then controlled to stop the opening command.

[0046] Upon receiving a closing command, the control mechanism of the cage door lowers the cage door to close the cage. During this process, the real-time torque of the drive motor of the cage door lifting mechanism is detected, and the cage door is judged to be stuck based on the detected real-time torque. If the real-time torque is significantly greater than the normal operating torque, it is determined that the cage door is stuck, and the cage door lifting mechanism is then controlled to stop driving the closing command.

[0047] In this embodiment of the invention, step S110, detecting the real-time torque of the drive motor in the cage door lifting mechanism, includes:

[0048] When the cage door of the elevator is in a constant speed operation phase, the real-time torque of the drive motor in the cage door elevator is detected.

[0049] Understandably, during both opening and closing, the cage door of the elevator, driven by the cage door lifting mechanism, sequentially undergoes an acceleration phase, a constant speed phase, and a deceleration phase. Since the acceleration and deceleration phases are short and the torque is unstable and rapidly changing, the real-time torque of the cage door lifting mechanism is only detected when the cage door is in the constant speed phase to ensure the accuracy of identifying jammed operational faults. However, this invention is not limited to this; the real-time torque of the drive motor in the cage door elevator can be detected throughout its entire lifecycle, and segmented or dynamic detection methods can be used. The real-time torque detected during the acceleration and deceleration phases is not limited to a specific threshold but can be a range of threshold values.

[0050] Specifically, the speed of the drive motor is controlled by the control code itself to determine the operating stage of the elevator cage door, so the program itself can determine the operating state of the elevator cage door.

[0051] In this embodiment of the invention, step S100, the elevator cage door fault detection method further includes:

[0052] The running time of the cage door lifting mechanism executing opening and closing commands is timed;

[0053] If the cage door lifting mechanism exceeds the time limit for executing the opening and closing command, it is determined that the cage door of the elevator has malfunctioned.

[0054] Understandably, when the cage door lifting mechanism executes an opening or closing command, its drive motor accelerates, maintains a constant speed, and decelerates according to set parameters. This ensures that the opening and closing times of the cage door are relatively consistent during normal operation. If the execution time of the opening or closing command significantly exceeds the normal operating time, a malfunction in the cage door is confirmed, prompting the mechanism to cease operation under the current command. Combining torque comparison and timeout judgment in identifying cage door malfunctions makes the identification more comprehensive and accurate.

[0055] In this embodiment of the invention, determining that the cage door of the elevator has malfunctioned when the running time for executing the opening and closing command of the cage door lifting mechanism exceeds the specified time includes:

[0056] When the cage door of the elevator has completed the uniform speed operation phase, the running time of the cage door lifting mechanism executing the opening and closing command is judged to exceed the time limit.

[0057] If the timeout is detected, it is determined that the elevator cage door has malfunctioned.

[0058] Understandably, during both opening and closing, the elevator cage door, driven by the cage door lifting mechanism, sequentially undergoes an acceleration phase, a constant speed phase, and a deceleration phase. If, after the constant speed phase of the elevator cage door ends, the execution time of the opening / closing command by the cage door lifting mechanism exceeds the specified time, and the current command has not yet ended, it can be determined that a malfunction has occurred in the elevator cage door after the constant speed phase, thus overcoming the inaccuracy of identifying malfunctions through torque comparison. Limiting the timeout judgment to after the constant speed phase of the elevator cage door avoids redundant calculations during the constant speed phase. Of course, this invention is not limited to this; the timeout detection judgment can be performed throughout the entire process of the cage door lifting mechanism executing the opening / closing command.

[0059] Specifically, upon receiving an opening command, the system controls the cage door lifting mechanism to raise the cage door to open the cage, and begins timing the execution time of the opening command. Simultaneously, as the cage door transitions from the acceleration phase to the constant speed phase, the real-time torque of the cage door lifting mechanism's drive motor is detected. Based on the detected real-time torque, the system determines whether the cage door is experiencing a jamming malfunction. If the real-time torque is significantly greater than the normal operating torque, a jamming malfunction is determined in the constant speed phase, and the cage door lifting mechanism is stopped from executing the current command. If the real-time torque is within the normal operating range, the cage door is considered to be operating normally in the constant speed phase. Simultaneously, as the cage door transitions from the constant speed phase to the deceleration phase, a timeout judgment is made regarding the execution time of the opening command. If the execution time of the opening command is significantly greater than the normal operating time, a malfunction is determined in the deceleration phase, and the cage door lifting mechanism is stopped from executing the opening command.

[0060] Furthermore, upon receiving a closing command, the system controls the cage door lifting mechanism to lower the cage door to close the hoist cage, and begins timing the execution time of the closing command. Simultaneously, as the cage door transitions from the acceleration phase to the constant speed phase, the real-time torque of the cage door lifting mechanism's drive motor is detected. Based on the detected real-time torque, the system determines whether the cage door is experiencing a jamming malfunction. If the real-time torque is significantly greater than the normal operating torque, it is determined that the cage door is jamming during the constant speed phase, and the system stops driving the cage door lifting mechanism under the current command. If the real-time torque is within the normal operating range, the cage door is considered to be operating normally during the constant speed phase. Simultaneously, as the cage door transitions from the constant speed phase to the deceleration phase, the system checks the timeout of the closing command execution time. If the execution time of the closing command is significantly greater than the normal operating time, it is determined that the cage door is experiencing a malfunction during the deceleration phase, and the system stops driving the cage door lifting mechanism under the closing command.

[0061] In this embodiment of the invention, when the elevator cage door has completed the uniform speed operation phase, the timeout determination of the running time for the cage door lifting mechanism to execute the opening and closing command includes:

[0062] When the elevator cage door has completed the uniform speed operation phase, receive the position monitoring information of the elevator cage door;

[0063] If the location monitoring information determines that the end opening / closing command has not been triggered, the running time of the cage door lifting mechanism executing the opening / closing command is judged to have exceeded the time limit.

[0064] Understandably, the cage door lifting mechanism relies on the position detection information of the cage door to end the opening and closing command. If the position monitoring information shows that the cage door has reached the opening and closing position corresponding to the opening and closing command, an end opening and closing command can be issued and the cage door lifting mechanism can be controlled to stop executing the opening and closing command. Only when the position monitoring information shows that the cage door has not yet reached the opening and closing position corresponding to the opening and closing command, is it necessary to judge the timeout of the cage door lifting mechanism's execution of the opening and closing command. If the timeout occurs, it is determined that the cage door has experienced a malfunction after the uniform speed operation phase.

[0065] It is important to note that, because the deceleration phase following the uniform speed operation phase of the elevator cage door is relatively short, the cause of operational failure is generally not due to external mechanical hardware jamming or deformation of the cage door itself. Rather, it is the sensor used to monitor the position of the elevator cage door. When the sensor malfunctions, even if the cage door lifting mechanism has already driven the elevator cage door to the opening / closing position corresponding to the opening / closing command, it cannot obtain the corresponding position monitoring information, and therefore cannot trigger the end opening / closing command. The cage door lifting mechanism remains in the driving state of executing the opening / closing command, causing the elevator cage door to malfunction.

[0066] Specifically, the hoist cage is equipped with an upper limit sensor and a lower limit sensor to detect the position of the hoist cage door. The upper limit sensor can be triggered when the hoist cage door is raised to the open position, and the lower limit sensor can be triggered when the hoist cage door is lowered to the closed position.

[0067] More specifically, when the cage door lifting mechanism executes the opening command to drive the cage door of the elevator to the fully opened position, if the upper limit sensor is not faulty, it will issue a position monitoring information indicating that the opening is in place, thereby triggering the end-of-open command and controlling the cage door lifting mechanism to stop the drive of the opening command. If the upper limit sensor is faulty, it will not issue a position monitoring information indicating that the opening is in place. Only after the running time of the cage door lifting mechanism executing the opening command is determined by timing can the fault of the upper limit sensor be identified, and the cage door lifting mechanism be controlled to stop the drive of the opening command.

[0068] Furthermore, when the cage door lifting mechanism executes the closing command and drives the cage door of the elevator to the closed position, if the lower limit sensor is not faulty, it will send a closed position monitoring information, thereby triggering the end closing command and controlling the cage door lifting mechanism to stop the closing command. If the lower limit sensor is faulty, it will not send a closed position monitoring information until the running time of the cage door lifting mechanism executing the closing command is determined by timing, at which point the lower limit sensor fault can be identified and the cage door lifting mechanism can be controlled to stop the closing command.

[0069] In this embodiment of the invention, timing the running time of the cage door lifting mechanism executing the opening and closing command includes:

[0070] The running time of the cage door lifting mechanism in executing opening and closing commands is timed based on the number of pulses from the drive motor.

[0071] Furthermore, the drive motor can be equipped with an encoder. The timing of the running time for the cage door lifting mechanism to execute the opening and closing command can be converted into counting the number of pulses of the encoder. The addition of the encoder can not only be used for timing, but also for measuring the speed and determining the direction of rotation.

[0072] In this embodiment of the invention, when a malfunction occurs in the cage door of the elevator, controlling the cage door lifting mechanism to stop executing opening and closing commands includes:

[0073] If a closing command is executed and the cage door of the elevator malfunctions, the cage door lifting mechanism will stop executing the closing command and execute the zero-return opening command.

[0074] Understandably, if the cage door malfunctions and stops moving while the cage door lifting mechanism is executing the closing command, the chain connecting it to the cage door will loosen and accumulate, potentially causing it to fall and injure personnel. In this situation, switching the cage door lifting mechanism from executing the closing command to executing the zero-return opening command allows the accumulated chain to be retracted promptly, eliminating the safety hazard. It should be noted that even if the cage door malfunctions and stops moving while executing the opening command, the chain connecting it to the cage door remains taut and will not loosen. The cage door is in a relatively stable state, and in this case, simply stopping the cage door lifting mechanism is sufficient.

[0075] like Figure 2 As shown, Figure 2 This schematically illustrates a flowchart of a fault detection method for a lift cage door during the opening process, according to another embodiment of the present invention. The fault detection method may include the following steps:

[0076] (1) Receive the door opening command;

[0077] (2) Control the opening of the elevator cage door and set the door opening timer;

[0078] (3) During the constant speed operation phase, the torque of the drive motor is judged to exceed the limit. If it exceeds the limit, an emergency stop is controlled. If it does not exceed the limit, it runs normally.

[0079] (4) After the uniform speed operation phase, it is determined whether the upper limit of the cage door has been reached. If the upper limit of the cage door has been reached, the "door opening ended" message is issued. If the upper limit of the cage door has not been reached, the timeout is determined.

[0080] (5) If the timeout is exceeded, control the emergency stop; if the timeout is not exceeded, return to the step of judging whether the upper limit of the cage door has been reached.

[0081] like Figure 3 As shown, Figure 3 This schematically illustrates a flowchart of a fault detection method for a lift cage door during the closing process, according to another embodiment of the present invention. The fault detection method may include the following steps:

[0082] (1) Receive the door closing command;

[0083] (2) Control the elevator cage door to close and set the closing timer;

[0084] (3) During the constant speed operation phase, the torque of the drive motor is judged to exceed the limit. If it exceeds the limit, the control executes the zero-opening command. If it does not exceed the limit, it operates normally.

[0085] (4) After the uniform speed operation phase, it is judged whether the lower limit of the cage door has been reached. If the lower limit of the cage door has been reached, the "closing end" message is issued. If the lower limit of the cage door has not been reached, the timeout is judged.

[0086] (5) If the timeout occurs, the control will execute the zero-opening command. If the timeout does not occur, the process will return to the step of judging whether the lower limit of the cage door has been reached.

[0087] In this embodiment of the invention, determining whether the elevator cage door has experienced a malfunction based on the real-time torque includes:

[0088] If the real-time torque obtained from multiple consecutive tests exceeds the preset torque, it is determined that the elevator cage door has a malfunction.

[0089] Understandably, if multiple torque over-limit judgments occur consecutively within a preset time period, it can be determined that the elevator cage door is experiencing a jamming malfunction, thus avoiding misjudgment. Specifically, the preset torque can be set much greater than the normal operating torque, but this preset torque must be within a reasonable range to encompass the abnormal torque that may occur when the elevator cage door jams.

[0090] A second aspect of the present invention provides a processor configured to execute the elevator cage door fault detection method described above. Since the processor employs all the technical solutions of the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated further here.

[0091] A third aspect of the present invention provides a fault detection device for a lift cage door, wherein the lift cage door fault detection device includes a lift cage door, a cage door lifting mechanism, and a processor as described above. Since the lift cage door fault detection device adopts all the technical solutions of the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated further here.

[0092] A fourth aspect of the present invention provides an elevator, wherein the elevator includes the elevator cage door fault detection device according to the above-described embodiments. Since the elevator adopts all the technical solutions of the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated further here.

[0093] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0094] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0095] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0096] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0097] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0098] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0099] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0100] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0101] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A method for detecting faults in elevator cage doors, characterized in that, The elevator cage door is raised and lowered and opened / closed under the drive of the cage door lifting mechanism. The elevator cage door fault detection method includes: The system receives and controls the cage door lifting mechanism to execute the opening and closing commands, and times the running time of the cage door lifting mechanism executing the opening and closing commands, wherein the opening and closing commands include opening commands and closing commands. When the cage door of the elevator is in a constant speed operation phase, the real-time torque of the drive motor in the cage door lifting mechanism is detected. The real-time torque is used to determine whether the elevator cage door, which is in the constant speed operation phase, has experienced a malfunction. If a malfunction occurs during the uniform speed operation of the cage door, the cage door lifting mechanism shall be controlled to stop executing the opening and closing command. If no malfunction occurs during the uniform speed operation, the cage door lifting mechanism shall be controlled to operate normally. After the elevator cage door completes the uniform speed operation phase, the position monitoring information of the elevator cage door is received. When the elevator cage door moves to the position, the upper limit sensor or lower limit sensor on the elevator cage initiates the position monitoring information of opening and closing and triggers the end of the opening and closing command. If the location monitoring information determines that the opening and closing command has not been triggered, the running time of the cage door lifting mechanism executing the opening and closing command is judged to have exceeded the time limit. If the running time of the opening and closing command exceeds the time limit, the upper limit sensor or the lower limit sensor is judged to be faulty.

2. The elevator cage door fault detection method according to claim 1, characterized in that, The timing of the operation time for the cage door lifting mechanism to execute the opening and closing command includes: The running time for the cage door lifting mechanism to execute the opening and closing command is timed based on the number of pulses from the drive motor.

3. The elevator cage door fault detection method according to claim 1 or 2, characterized in that, In the event of a malfunction in the cage door of the elevator, controlling the cage door lifting mechanism to stop executing the opening and closing command includes: If the closing command is executed and the cage door of the elevator malfunctions, the cage door lifting mechanism is controlled to stop executing the closing command and execute the zero-return opening command.

4. The elevator cage door fault detection method according to claim 1 or 2, characterized in that, The step of determining whether the elevator cage door has a malfunction based on the real-time torque includes: If the real-time torque obtained from multiple consecutive tests exceeds the preset torque, it is determined that the elevator cage door has a malfunction.

5. A processor, characterized in that, The processor is configured to execute the elevator cage door fault detection method according to any one of claims 1 to 4.

6. A fault detection device for elevator cage doors, characterized in that, The elevator cage door fault detection device includes an elevator cage door, a cage door lifting mechanism, and a processor as described in claim 5.

7. An elevator, characterized in that, The elevator includes the elevator cage door fault detection device according to claim 6.

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