Elevator shallow pit control method, device, controller and system

Abstract

The invention relates to an elevator shallow pit control method, device, controller and system. The method comprises the steps that under the condition that an elevator is in a shallow pit operation mode, a received maintenance instruction is responded, and a shallow pit operation quitting process is executed so as to indicate the elevator to enter the maintenance mode; the process of exiting from the shallow pit operation comprises the steps of indicating the lift car of the elevator to operate upwards until the stopping operation distance reaches the target distance, and adjusting the buffer distance of a buffer of the elevator; the adjusted buffering distance is used for providing buffering for the stopped lift car; under the condition that execution of the shallow pit quitting process is completed, prompt information is output; the prompt information is used for indicating that the elevator is currently in a maintenance mode; the problems that in a traditional technical scheme, when maintenance personnel enter the pit for maintenance, related devices need to be installed and operated to guarantee that the elevator is in the maintenance mode of exiting from the shallow pit, and the pit maintenance operation efficiency is low are effectively solved.

Description

Technical Field

[0001] The present application relates to the field of elevator control technology, and in particular to an elevator shallow pit control method, device, controller and system. Background Art

[0002] At present, most of the shallow pit control of elevators is achieved by adding limit switches, car buffer heightening seats, car buffers, detection switches, in-place switches and safety systems to the original elevator configuration. When the maintenance personnel use the key outside the hall to open any door that can enter the pit, the detection switch set on the corresponding door will be activated, thereby triggering the electrical safety system to stop the normal operation of the elevator. At this time, the car needs to stop at a position far away from the pit ground to facilitate the maintenance personnel to enter the pit. Only when the maintenance personnel enter the pit and install the heightening seat between the car buffer and the pit ground so that the car buffer is raised, can the elevator be operated for maintenance. Therefore, even if the depth of the elevator pit is small, the safety of the pit maintenance personnel during maintenance can be ensured.

[0003] However, in the traditional solution, maintenance personnel need to install and operate related devices when entering the pit. Devices may be damaged during the operation, causing the elevator to be unable to operate normally, affecting the efficiency of pit maintenance operations. Summary of the invention

[0004] Based on this, it is necessary to provide an elevator shallow pit control method, device, controller and system to address the above technical problems.

[0005] In a first aspect, the present application provides a method for controlling an elevator shallow pit, the method comprising:

[0006] When the elevator is in the shallow pit operation mode, in response to receiving the maintenance instruction, executing the shallow pit operation exit process to instruct the elevator to enter the maintenance mode; the shallow pit operation exit process includes instructing the elevator car to run upward until the running distance of the stop reaches the target distance, and adjusting the buffer distance of the elevator buffer; the adjusted buffer distance is used to provide buffering for the car after the stop;

[0007] When the exit from the shallow pit process is completed, a prompt message is output; the prompt message is used to indicate that the elevator is currently in maintenance mode.

[0008] In one embodiment, the method further comprises:

[0009] The target distance is determined based on the lower limit position corresponding to the shallow pit operation mode and the lower limit position corresponding to the maintenance mode.

[0010] In one embodiment, the target distance is obtained according to the shallow pit depth, the elevator running speed and the load data.

[0011] In one embodiment, the method further comprises:

[0012] Get the absolute position of the car and confirm whether the running distance reaches the target distance based on the absolute position.

[0013] In one embodiment, the method further comprises:

[0014] In response to the elevator entering the shallow pit operation mode, a buffer distance of the buffer is determined based on a lower limit position corresponding to the shallow pit operation mode.

[0015] In a second aspect, the present application further provides an elevator shallow pit control device, the device comprising:

[0016] a process execution module, for executing, in response to receiving a maintenance instruction, a shallow pit exit operation process when the elevator is in a shallow pit operation mode, so as to instruct the elevator to enter the maintenance mode; the shallow pit exit operation process includes instructing the elevator car to run upward until the running distance of the stop reaches the target distance, and adjusting the buffer distance of the elevator buffer; the adjusted buffer distance is used to provide buffering for the car after the stop;

[0017] The information prompt module is used to output a prompt message when the shallow pit exit process is completed; the prompt message is used to indicate that the elevator is currently in maintenance mode.

[0018] In a third aspect, the present application further provides an elevator controller, the elevator controller comprising:

[0019] one or more processors;

[0020] a memory for storing one or more computer programs;

[0021] When one or more computer programs are executed by one or more processors, the one or more processors implement the steps of the elevator shallow pit control method provided in the first aspect of the present application.

[0022] In a fourth aspect, the present application further provides an elevator shallow pit control system, comprising an elevator controller, and a buffer connected to the elevator controller; wherein:

[0023] The elevator controller is used to execute the elevator shallow pit control method provided in the first aspect.

[0024] In one of the embodiments, the system further comprises a cushioned base;

[0025] The bottom of the buffer base is arranged at the center of the bottom of the car;

[0026] The buffer is rotatably arranged on the buffer base and connected to the elevator controller, and is used to adjust the buffer distance by rotation to provide buffering for the car.

[0027] The above-mentioned elevator shallow pit control method, device, controller and system can, when the elevator is in the shallow pit operation mode, instruct the elevator car to move up a target distance according to the received maintenance instructions, and adjust the buffer distance of the buffer to be able to provide buffering for the elevator car after the elevator car moves up the target distance, so that when the elevator needs to be maintained, the elevator can be quickly and efficiently guaranteed to exit the shallow pit; and when the elevator exits the shallow pit, a prompt message is output to prompt that the current elevator has entered the maintenance mode; this effectively solves the problem of low efficiency of pit maintenance operations in traditional technical solutions, that maintenance personnel need to install and operate related devices to ensure that the elevator is in the maintenance mode of exiting the shallow pit when entering the pit for maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Schematic diagram of an application environment of a shallow pit control method for an elevator in one embodiment;

[0029] Figure 2 A schematic diagram of the steps of a shallow pit control method for an elevator in one embodiment;

[0030] Figure 3 2 is a schematic diagram of the structure of a shallow pit control device for an elevator in one embodiment;

[0031] Figure 4 is a schematic diagram of the structure of a buffer in a shallow pit operation mode in one embodiment;

[0032] Figure 5 A schematic diagram of the structure of a buffer in a maintenance mode according to an embodiment;

[0033] Figure 6 Schematic diagram of a process for entering and exiting an elevator shallow pit mode in one embodiment. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0036] In this application, unless otherwise clearly specified and limited, the terms "connected", "connection" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0037] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element, or connected to the other element through an intermediate element. In addition, the "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc. if there is transmission of electrical signals or data between the connected objects.

[0038] At present, when maintenance personnel enter the pit, they need to install and operate relevant devices, which places high demands on the maintenance personnel. Devices may also be damaged during the operation, causing the elevator to be unable to operate normally, and the efficiency of maintenance personnel performing pit maintenance work is low. Since the pit environment is a place with relatively harsh hoistway environment, and the existing shallow pit control technology results in a large number of electrical components, electrical components are prone to damage, increasing the elevator maintenance cost and affecting the elevator operation and life.

[0039] The elevator shallow pit control method provided in the embodiment of the present application can be applied to Figure 1 In the application environment shown in the figure: Figure 1 The elevator controller can control the elevator car and buffer through the maintenance instructions sent by the mobile phone APP through the cloud, or directly through the maintenance instructions sent by the physical buttons set on the car, and output prompt information through the call box outside the hall.

[0040] In an exemplary embodiment, Figure 2 As shown, a method for controlling a shallow pit of an elevator is provided, and the method is applied to Figure 1 The application environment shown in FIG. 1 is used for explanation, and the steps include the following steps 220 to 240. Among them:

[0041] Step 220: When the elevator is in the shallow pit operation mode, in response to receiving the maintenance instruction, executing the shallow pit operation exit process to instruct the elevator to enter the maintenance mode; the shallow pit operation exit process includes instructing the elevator car to run upward until the stop running distance reaches the target distance, and adjusting the buffer distance of the elevator buffer; the adjusted buffer distance is used to provide buffering for the car after the stop;

[0042] Specifically, the shallow pit operation mode is a working mode in which the elevator can run downward to enter the pit when it is operating normally; correspondingly, the maintenance mode is a working mode in which the elevator needs to start maintenance and repair work and vacate the pit space after rising. Among them, after the elevator enters the maintenance mode, it will not respond to any calls (from the call box outside the hall) and is only controlled by the maintenance personnel (their maintenance equipment) to ensure the safety of the elevator passengers.

[0043] Furthermore, when the elevator receives a maintenance instruction and executes the process of exiting the shallow pit, the elevator runs upward from the original parking position to the target distance to reach the new parking position, thereby freeing up enough space in the pit to facilitate the entry and exit of staff.

[0044] Specifically, the target distance may be automatically derived according to the parameters of the elevator and the reserved position requirements of the pit.

[0045] In an exemplary embodiment, the target distance is obtained according to the shallow pit depth, the elevator running speed and the load data.

[0046] Specifically, when the elevator leaves the factory, the data required by the customer, such as the shallow pit depth, elevator running speed, and elevator's own load, are input into the host computer, and the pit space that needs to be reserved when the elevator exits the shallow pit mode is calculated. The target distance for the elevator to run upward when executing the shallow pit exit process is determined based on the pit space that needs to be reserved. This target distance is brought into the mainboard when the program is burned, and cannot be changed by technicians other than the elevator manufacturer.

[0047] For example, a limit switch can be set according to the target distance of the upward run and the position of the car after stopping, so as to ensure that the elevator is limited to the position of the car after stopping from the perspective of signal control.

[0048] On the other hand, in order to ensure the safety of the elevator, after the elevator car moves upward, the buffer of the elevator is synchronously adjusted so that it can provide buffering at the position after the car moves, so as to ensure the safety of the elevator and personnel after the elevator enters the maintenance mode from the shallow pit operation mode in terms of hardware.

[0049] Specifically, the buffer can provide support for the car and ensure the safety of people in the pit when the elevator falls, even when the elevator maintenance command control fails.

[0050] Step 240: When the shallow pit exit process is completed, a prompt message is output; the prompt message is used to indicate that the elevator is currently in maintenance mode.

[0051] Specifically, the prompt information can be used to indicate to the staff that the elevator has entered the maintenance mode, so that the staff can enter the pit according to the prompt information.

[0052] Furthermore, the prompt information can also be used to indicate that the passenger elevator is currently in maintenance mode and is temporarily suspending passenger or cargo transportation.

[0053] The above-mentioned elevator shallow pit control method can, when the elevator is in the shallow pit operation mode, instruct the elevator car to move up a target distance according to the received maintenance instructions, and adjust the buffer distance of the buffer to be able to provide buffering for the elevator car after the elevator car moves up the target distance, so that when the elevator needs to be maintained, the elevator can be quickly and efficiently guaranteed to exit the shallow pit; and when the elevator exits the shallow pit, a prompt message is output to prompt that the current elevator has entered the maintenance mode; this effectively solves the problem of low efficiency of pit maintenance operations in traditional technical solutions, that maintenance personnel need to install and operate related devices when entering the pit for maintenance to ensure that the elevator is in the maintenance mode of exiting the shallow pit.

[0054] In an exemplary embodiment, the elevator shallow pit control method may further include the following steps:

[0055] The target distance is determined based on the lower limit position corresponding to the shallow pit operation mode and the lower limit position corresponding to the maintenance mode.

[0056] Specifically, the lower limit position corresponding to the shallow pit operation mode may be the lowest safe position for the elevator to descend in the hoistway when the elevator is working normally.

[0057] Furthermore, the lower limit position corresponding to the maintenance mode is the lowest safe position set when the elevator moves upward to free up pit space.

[0058] When the elevator is below the safe position, it may cause danger to the staff who have entered the pit, or damage the working components in the elevator pit, so it is necessary to set the lower limit position.

[0059] In an exemplary embodiment, virtual limit switches can be set to set the lower limit position corresponding to the shallow pit operation mode and the lower limit position corresponding to the maintenance mode, respectively, to ensure that the elevator can stop running when the position falls below the lower limit during normal operation and when exiting the shallow pit mode.

[0060] Specifically, when the elevator is set to the lower limit position corresponding to the maintenance mode, the maintenance mode operation can be performed. The staff controls the elevator to operate in the maintenance mode and performs relevant maintenance and testing work on the elevator.

[0061] In an exemplary embodiment, the elevator can be automatically controlled by respectively setting a virtual lower limit switch for the shallow pit operation mode and a virtual lower limit switch for the maintenance mode; when the elevator exits the shallow pit mode and moves upward to the parking position after running a target distance, the virtual lower limit switch of the elevator is controlled to move upward to the parking position after running the target distance, thereby limiting the lower limit of the elevator; so as to realize intelligent control of the elevator to exit the shallow pit operation mode with one button.

[0062] In an exemplary embodiment, the elevator shallow pit control method may further include the following steps:

[0063] Get the absolute position of the car and confirm whether the running distance reaches the target distance based on the absolute position.

[0064] Specifically, the absolute position of the car may refer to the height position of the car in the hoistway, or the height difference from the ground level, or the height difference from the lowest door opening area.

[0065] Furthermore, the elevator can continuously monitor the absolute position of the car, so that it can continuously obtain the running distance of the car when the elevator enters the maintenance mode from the shallow pit operation mode, and then determine whether the target distance has been reached.

[0066] In an exemplary embodiment, the elevator shallow pit control method may further include the following steps:

[0067] In response to the elevator entering the shallow pit operation mode, a buffer distance of the buffer is determined based on a lower limit position corresponding to the shallow pit operation mode.

[0068] Specifically, the buffer of an elevator is usually used to slow down the movement speed of the car and reduce the impact force when the car reaches the terminal position. It is also used to play a buffering role when the elevator is moving upward or downward due to wire rope breakage, traction, friction, insufficient brake braking force or control system failure below the lower limit, so as to avoid the elevator car or counterweight directly hitting the bottom or the top, thereby protecting the safety of passengers and equipment; therefore, when the elevator is in the shallow pit operation mode, it is necessary to determine the buffer distance of the buffer based on the lower limit position of the elevator in the shallow pit mode, and set the buffer accordingly, so that the position of the buffer is just used to buffer and protect the car.

[0069] Furthermore, a rotatable buffer can be provided to provide buffering for the elevator car in both the shallow pit operation mode and the maintenance mode;

[0070] Exemplarily, the buffer distance of the buffer is adjustable, and when in the shallow pit operation mode, it can provide buffering for the elevator car at the lower limit of the shallow pit mode. When the elevator exits the shallow pit mode, the buffer distance is increased through adjustment, so that it can provide buffering for the elevator car at the lower limit of the maintenance mode.

[0071] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0072] Based on the same inventive concept, the embodiment of the present application also provides an elevator shallow pit control device for implementing the elevator shallow pit control method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more elevator shallow pit control device embodiments provided below can refer to the limitations of the elevator shallow pit control method above, and will not be repeated here.

[0073] In an exemplary embodiment, Figure 3 As shown, an elevator shallow pit control device 300 is provided, comprising:

[0074] The process execution module 302 is used for executing the process of exiting the shallow pit operation in response to receiving the maintenance instruction when the elevator is in the shallow pit operation mode, so as to instruct the elevator to enter the maintenance mode; the process of exiting the shallow pit operation includes instructing the elevator car to run upward until the running distance of the stop reaches the target distance, and adjusting the buffer distance of the buffer of the elevator; the adjusted buffer distance is used to provide buffering for the car after the stop;

[0075] The information prompt module 304 is used to output a prompt message when the shallow pit exit process is completed; the prompt message is used to indicate that the elevator is currently in a maintenance mode.

[0076] In an exemplary embodiment, the elevator shallow pit control device 300 further includes:

[0077] The target distance determination module is used to determine the target distance according to the lower limit position corresponding to the shallow pit operation mode and the lower limit position corresponding to the maintenance mode.

[0078] In an exemplary embodiment, the target distance is obtained according to the shallow pit depth, the elevator running speed and the load data.

[0079] In an exemplary embodiment, the elevator shallow pit control device 300 further includes:

[0080] The judgment module is used to obtain the absolute position of the car and confirm whether the running distance reaches the target distance based on the absolute position.

[0081] In an exemplary embodiment, the elevator shallow pit control device further includes:

[0082] The buffer distance determination module is used to determine the buffer distance of the buffer based on the lower limit position corresponding to the shallow pit operation mode in response to the elevator entering the shallow pit operation mode.

[0083] Each module in the above elevator shallow pit control device can be implemented in whole or in part by software, hardware or a combination thereof. Each module can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute operations corresponding to each module.

[0084] The embodiment of the present application further provides an elevator controller for implementing the above-mentioned elevator shallow pit control method, the elevator controller comprising:

[0085] one or more processors;

[0086] a memory for storing one or more computer programs;

[0087] When the one or more computer programs are executed by the one or more processors, the one or more processors implement the elevator shallow pit control method provided in the aforementioned embodiments.

[0088] In an exemplary embodiment, the elevator controller may be an elevator microcomputer.

[0089] Based on the same inventive concept, an embodiment of the present application also provides an elevator shallow pit control system for implementing the above-mentioned elevator shallow pit control method, including an elevator controller and a buffer connected to the elevator controller, and the elevator controller is used to execute the elevator shallow pit control method provided in the embodiment of the present application.

[0090] In an exemplary embodiment, the elevator shallow pit control system further includes:

[0091] A scale is arranged throughout the elevator shaft, and a scale sensor is arranged on the elevator car and connected to the elevator controller, so as to obtain the absolute position of the car in the shaft by detecting the scale.

[0092] Specifically, the scale sensor installed in the elevator car can continuously obtain the absolute position of the elevator car in the hoistway through the scale installed throughout the hoistway, and can also learn the height of the entire hoistway, the height of each floor, and the lower limit position that should be set when the elevator is normally in the shallow pit mode through the scale; and according to the lower limit position that should be set, the virtual lower limit position corresponding to the shallow pit operation mode and the virtual lower limit position corresponding to the maintenance mode are set, and the virtual lower limit position is used instead of the physical switch to ensure that the movement of the virtual lower limit of the elevator can be directly controlled by the controller.

[0093] Furthermore, when it is necessary to exit the shallow pit operation mode and enter the maintenance mode, the target distance can be determined and moved through the virtual lower limit of the maintenance mode and the absolute position of the current car. When it moves to the virtual lower limit of the maintenance mode, the elevator cannot be controlled to descend due to the existence of the virtual lower limit, thereby achieving the purpose of setting the limit switch.

[0094] As mentioned above, the present application forms a real-time monitoring system for the car position with the help of a scale with absolute position coding, a scale sensor, and an elevator microcomputer. The originally required lower limit switch is virtualized through the elevator microcomputer algorithm, and the virtualized lower limit switch position can be moved through different elevator modes, and the buffer mode automatic switching and mode button are combined to achieve shallow pit control. The present application has the advantages of few components, low cost, convenient operation, high maintenance efficiency, and no impact on elevator operation and life.

[0095] In an exemplary embodiment, Figure 4 and Figure 5 As shown, the elevator shallow pit control system also includes a buffer base;

[0096] The bottom of the buffer base is arranged at the center of the bottom of the car;

[0097] The buffer is rotatably arranged on the buffer base and connected to the elevator controller, and is used to adjust the buffer distance by rotation to provide buffering for the car.

[0098] Furthermore, the buffer may include a first buffer portion and a second buffer portion perpendicular to each other, the first buffer portion and the second buffer portion are both rectangular buffer portions, the first buffer portion is higher than the second buffer portion; and one end of the first component and the second component are both fixed to the buffer base;

[0099] When adjusting the buffer distance, the first buffer part and the second buffer part can be adjusted in height by rotating with one end fixed to the buffer base as the rotation center; when the central axis of the first buffer part rotates to be perpendicular to the ground, its buffer distance is exactly matched with the lower limit of the elevator in the maintenance mode, so that the buffer can provide buffering for the elevator in the maintenance mode; and when the central axis of the second buffer part rotates to be perpendicular to the ground, its buffer distance is exactly matched with the lower limit of the elevator in normal operation, so that the buffer can provide buffering for the elevator in the shallow pit mode.

[0100] When receiving the maintenance instruction and executing the process of exiting the shallow pit, the elevator car runs upward until the stopping distance reaches the target distance. At the same time, the buffer rotates, and the first buffer part rotates from horizontal to vertical to the ground. When the elevator receives the maintenance instruction, it can simultaneously complete all the preparations for exiting the shallow pit and entering the maintenance mode. This effectively solves the problem of low efficiency of pit maintenance operations in traditional technical solutions, which requires maintenance personnel to install and operate related devices when entering the pit for maintenance to ensure that the elevator is in the maintenance mode for exiting the shallow pit.

[0101] In order to further explain the solution of the present application, a specific example is given below to illustrate that the workflow of the elevator shallow pit control system may include:

[0102] A scale with absolute position coding is passed through the entire elevator shaft, and the scale sensor is installed at the car to communicate with the elevator computer in real time, so that the elevator computer can obtain the absolute position of the car in real time.

[0103] After the elevator automatically completes learning the floor height, it will automatically establish a virtual lower limit for normal operation of the elevator based on the lower limit setting value in the shallow pit mode. At this time, it will also automatically move up the setting value of the shallow pit lower limit (that is, the target distance for the car to run upward when the elevator exits the shallow pit control mode) to establish a virtual lower limit for the elevator to exit the shallow pit control mode (shallow pit operation mode). The virtual lower limit of the shallow pit operation mode and the virtual lower limit of the maintenance mode are both absolute positions.

[0104] The physical mode button is installed on the hall call box (or the virtual mode button is installed on the maintenance personnel's debugging mobile phone APP). Through secret commands (control instructions), the maintenance personnel can make the elevator enter or exit the shallow pit operation mode (the original state of the elevator is the shallow pit operation mode); in daily use, passengers (outside the hall call box) cannot operate the shallow pit operation mode. After exiting the shallow pit control mode, the elevator will not respond to any calls (from the hall call box) and will only be controlled by the maintenance personnel (maintenance equipment) to ensure the safety of the elevator passengers; before the maintenance personnel enter the pit, after completing the exit from the shallow pit control mode, they will use the hall signal (prompt information) to determine whether the upward running distance of the car is completed and whether the mode switching of the buffer is completed. After the elevator is fully completed, the maintenance personnel can enter the pit to ensure the safety of the elevator maintenance personnel.

[0105] The automatic switching of the buffer mode is based on the elevator mode. When the elevator is in shallow pit mode, the buffer is in low mode (the second buffer is perpendicular to the ground). The low mode ensures that the pit depth required for elevator operation can be very shallow. When exiting the pit control mode for maintenance, the buffer will automatically switch to high mode (the second buffer is perpendicular to the ground) while the elevator car runs upward to the target distance. The high mode ensures the absolute safety of the pit maintenance personnel during maintenance.

[0106] Furthermore, when the elevator is in the shallow pit control technology, the buffer is in the short mode; the short buffer becomes the actual buffer used by the elevator, and the high buffer (first buffer part) and the short buffer (second buffer part) are installed at 90° on the buffer base, so that when the elevator is running, only a shallow pit depth is required. When the elevator exits the shallow pit control technology, the buffer is in the high mode; the high buffer becomes the actual buffer used by the elevator, and the short buffer and the high buffer are installed at 90° on the buffer base, so that the maintenance space of the maintenance personnel can be increased, so that they can ensure safety during pit maintenance. The switching of the buffer mode is switched by a microcomputer according to the shallow pit control mode of the elevator. The high and low buffers are installed at right angles on the rotating shaft on the buffer base. The rotating shaft can be electrically controlled and rotated and maintained between 0° and 90° according to different modes. When the elevator is in the shallow pit control mode, the angle of the rotating shaft is electrically rotated to 0° and locked. At this time, the buffer assembly is put into the short buffer, otherwise the angle of the rotating shaft is electrically rotated to 90° and locked, then the high buffer is put into, and the electric control of the rotating shaft can be controlled by the (elevator) microcomputer.

[0107] The original state of the elevator is the shallow pit control mode. The pit depth required for the normal operation of the elevator in this mode is very shallow and can be designed according to civil engineering requirements. During maintenance, the maintenance personnel operate the elevator to exit the shallow pit control mode, so that the elevator buffer can enter the high mode and the elevator lower limit can be lifted to the target distance, ensuring safety and meeting national standards.

[0108] The set value of the target distance is set when the elevator leaves the factory. It is automatically calculated based on the shallow pit depth, elevator running speed, load and other data required by the customer. It is brought into the mainboard when the program is burned and cannot be changed by technicians other than the elevator manufacturer.

[0109] Whether the elevator enters or exits the shallow pit control mode, the elevator will inform the maintenance personnel through a signal (prompt information), which can also be an audio-visual signal; before entering the pit, the elevator car will complete the upward running target distance and the buffer mode switching is completed. The maintenance personnel are also informed through the above prompts (information).

[0110] Specifically, Figure 6 As shown, the control process of the elevator entering the maintenance mode from the shallow pit mode may include:

[0111] Determine whether the elevator has the shallow pit control function, set the value of N1 (target distance) according to the customer (civil engineering) requirements and the elevator (factory) parameters, and determine whether the elevator has completed the floor height measurement; if not, determine whether the floor height measurement is completed again. If yes, further determine the virtual lower limit DLS (Down Limit The elevator determines whether the elevator has exited the shallow pit control mode. If not, it determines whether the elevator has exited the shallow pit control mode again. If so, the elevator exits the shallow pit mode and raises the lower limit DLS1 to DLS2. It determines whether the elevator is at the bottom layer. If not, the elevator moves downward to the bottom layer. If so, the elevator is controlled to rise by N1 and the buffer is switched to the high mode (the central axis of the first buffer is perpendicular to the ground), and a prompt message is issued. It determines whether the maintenance personnel have received the prompt message. If not, it determines whether the prompt message is sent again. If so, the maintenance personnel enter the pit to work. It determines whether the maintenance personnel have completed the work and left the pit. If not, it continues to determine. If so, the elevator is controlled to enter the shallow pit operation mode, and the elevator buffer is switched from the high mode to the low mode (the central axis of the second buffer is horizontal to the ground). The lower limit of the elevator is lowered from DSL2 to DLS1, and an outside hall message (or cloud message) is issued. The elevator runs autonomously and returns to normal.

[0112] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps of the above-mentioned elevator shallow pit control method are implemented.

[0113] In one embodiment, a computer program product is provided, comprising a computer program, which implements the steps of the above-mentioned elevator shallow pit control method when executed by a processor.

[0114] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but are not limited to this.

[0115] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0116] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A method for controlling a shallow pit of an elevator, It is characterized in that include: When the elevator is in a shallow pit operation mode, in response to receiving a maintenance instruction, executing an exit shallow pit operation process to instruct the elevator to enter the maintenance mode; the exit shallow pit operation process includes instructing the elevator car to run upward until the running distance of the stop reaches a target distance, and adjusting the buffer distance of the buffer of the elevator; The adjusted buffer distance is used to provide buffering for the car after it stops; When the exit from the shallow pit process is completed, outputting a prompt message; The prompt information is used to indicate that the elevator is currently in the maintenance mode.

2. The elevator shallow pit control method according to claim 1, It is characterized in that The method further comprises: The target distance is determined according to the lower limit position corresponding to the shallow pit operation mode and the lower limit position corresponding to the maintenance mode.

3. The elevator shallow pit control method according to claim 1, It is characterized in that The target distance is obtained according to the shallow pit depth, elevator running speed and load data.

4. The elevator shallow pit control method according to claim 1, It is characterized in that The method further comprises: The absolute position of the car is obtained, and whether the running distance reaches the target distance is confirmed according to the absolute position.

5. The elevator shallow pit control method according to any one of claims 1 to 4, It is characterized in that The method further comprises: In response to the elevator entering the shallow pit operation mode, a buffering distance of the buffer is determined based on a lower limit position corresponding to the shallow pit operation mode.

6. An elevator shallow pit control device, It is characterized in that The device comprises: a process execution module, for executing, in response to receiving a maintenance instruction, a shallow pit exit operation process when the elevator is in a shallow pit operation mode, so as to instruct the elevator to enter the maintenance mode; the shallow pit exit operation process includes instructing the elevator car to run upward until the running distance of the stop reaches the target distance, and adjusting the buffer distance of the buffer of the elevator; the adjusted buffer distance is used to provide buffering for the car after the stop; An information prompt module is used to output a prompt message when the exit from the shallow pit process is completed; the prompt message is used to indicate that the elevator is currently in the maintenance mode.

7. An elevator controller, It is characterized in that The elevator controller comprises: one or more processors; a memory for storing one or more computer programs; When the one or more computer programs are executed by the one or more processors, the one or more processors implement the elevator shallow pit control method according to any one of claims 1 to 5.

8. An elevator shallow pit control system, It is characterized in that The invention comprises an elevator controller and a buffer connected to the elevator controller; wherein: The elevator controller is used to execute the elevator shallow pit control method according to any one of claims 1 to 5.

9. The elevator shallow pit control system according to claim 8, It is characterized in that The system further comprises: The scale installed throughout the elevator shaft; A scale sensor disposed on the elevator car is connected to the elevator controller and is used to obtain the absolute position of the car in the hoistway by detecting the scale.

10. The elevator shallow pit control system according to claim 8 or 9, It is characterized in that Also included is a cushioned base; The bottom of the buffer base is arranged at the center of the bottom of the car; The buffer is rotatably arranged on the buffer base, connected to the elevator controller, and is used for adjusting the buffer distance by rotating to provide buffering for the car.

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