Display control system and method for an elevator

Abstract

The application relates to the field of elevators, and discloses an elevator display control system and method, which are used for improving the tracking performance and stability of an elevator display system. The system comprises the following steps: determining a target display position corresponding to the physical position of an elevator platform, and calculating the error between the target display position and the internal display state; based on the error, calculating a sliding mode surface value through a sliding mode control theory, and processing the sliding mode surface value through a boundary layer saturation function to generate a display control instruction. The application effectively solves the problems of display delay, jitter, slow convergence and the like in the display control method of a traditional elevator, and significantly improves the real-time performance, stability and positioning accuracy of display.

Description

Technical Field

[0001] This invention relates to the field of elevators, and more particularly to a display control system and method for elevators. Background Technology

[0002] The research background of display and control technology for construction hoists in nuclear power engineering is closely related to the actual needs of the project. Construction hoists are key equipment used for the vertical transportation of personnel, equipment, and materials during the construction of nuclear power plants. Their operational safety, reliability, and intuitive monitoring are crucial for ensuring construction safety and improving work efficiency. Hoists are typically equipped with position display systems (such as car position indicator lights and floor displays) to indicate the current height, direction of travel, and target floor of the hoist platform in real time, enabling operators and passengers to accurately grasp the hoist's status.

[0003] In practical engineering applications, especially in scenarios like nuclear power where safety, accuracy, and real-time performance requirements are extremely high, elevator display and control systems face a series of unique challenges. Under complex operating conditions such as high-speed operation, emergency stops, load changes, and mechanical vibrations, traditional display and control methods often have the following shortcomings: Traditional control methods have limited dynamic response speed when dealing with nonlinearity, parameter changes and external disturbances. This can easily lead to a large tracking error between the displayed position and the actual physical position of the elevator platform, as well as a significant delay, making it difficult to achieve high-precision real-time position synchronization display.

[0004] The construction environment of nuclear power plants may present adverse factors such as electromagnetic interference and mechanical vibration. Traditional methods are not robust enough and are prone to display jitter, flickering, or numerical jumps due to interference, affecting the stability and readability of the display and even misleading operators.

[0005] During platform acceleration, deceleration, and docking phases, traditional control strategies struggle to achieve a good balance between rapid convergence (reducing tracking time) and stable display (avoiding overshoot and oscillation). Particularly during precise docking, the displayed value may fluctuate, failing to stabilize quickly and smoothly at the target position, thus reducing the sense of security and operational efficiency during the docking process.

[0006] Therefore, we propose a display control system and method for elevators to solve the above problems. Summary of the Invention

[0007] This invention provides a display control system and method for an elevator, which improves the tracking performance and stability of the display system.

[0008] The first aspect of the present invention provides a display control method for an elevator, the display control method comprising: determining a continuous target display position corresponding to the physical position of the elevator platform; obtaining an error between the target display position and the internal display state; obtaining a sliding surface value based on the error; processing the sliding surface value to generate a display control command; driving the internal display state to change according to the display control command, and mapping it to the platform display output.

[0009] Optionally, in a first implementation of the first aspect of the present invention, the method includes: calculating the difference between the target display position and the internal display state to obtain a current error value; determining the error change rate based on the time change of the current error value; and forming an error quantity based on the current error value and the error change rate.

[0010] Optionally, in a second implementation of the first aspect of the present invention, the current error value recorded in adjacent control cycles is obtained; the time difference between adjacent control cycles is calculated; and the error change rate is determined based on the difference of the current error value in the adjacent control cycles and the time difference.

[0011] Optionally, in a third implementation of the first aspect of the present invention, the method includes: obtaining a current error value and an error change rate from the error quantity; multiplying the current error value by a preset convergence factor to obtain an error adjustment term; and adding the error adjustment term to the error change rate to obtain a sliding surface value.

[0012] Optionally, in a fourth implementation of the first aspect of the present invention, the method includes: obtaining the error amplitude of the current error value; comparing the error amplitude with a preset amplitude threshold to obtain an amplitude comparison signal; selecting a corresponding convergence factor from a set of preset convergence factor values ​​as the actual application convergence factor based on the amplitude comparison signal; and obtaining an error adjustment term based on the current error value and the actual application convergence factor.

[0013] Optionally, in a fifth implementation of the first aspect of the present invention, the method includes: obtaining the sliding surface value and a preset boundary layer thickness parameter; calculating the ratio of the sliding surface value to the boundary layer thickness parameter to obtain a normalized parameter; inputting the normalized parameter into the saturation function for processing to obtain a saturation output value; and multiplying the saturation output value by a preset control gain coefficient to obtain a display control command.

[0014] Optionally, in a sixth implementation of the first aspect of the present invention, the method includes: superimposing the display control command with the internal display state change rate to obtain an updated internal display state change rate; updating the value of the internal display state using the updated internal display state change rate; calculating the ratio of the value of the internal display state to its height based on the value of the internal display state to obtain a mapped position; and obtaining information and a running direction indication based on the mapped position.

[0015] Optionally, in a seventh implementation of the first aspect of the present invention, the method further includes: detecting whether the elevator platform has entered the platform docking stage; when the platform docking stage is detected, adjusting the dynamic process of the internal display state change based on a preset locking gain; and using the adjusted dynamic process to drive the internal display state so that it quickly converges to the precise display position of the target.

[0016] Optionally, in an eighth implementation of the first aspect of the present invention, the method includes: obtaining the operating speed of the elevator platform; comparing the operating speed with a preset speed threshold to obtain a platform status confirmation signal; increasing the value of the convergence factor used to calculate the sliding surface value based on the platform status confirmation signal; and using the increased convergence factor to participate in obtaining a new sliding surface value to accelerate the convergence process of the internal display state towards the target.

[0017] A second aspect of the present invention provides a display control system for an elevator, the display control system comprising: a position determination module for determining a continuous target display position corresponding to the physical position of the elevator platform; an error calculation module for obtaining the error between the target display position and the internal display state; a sliding mode control module for obtaining a sliding mode surface value based on the error; an instruction generation module for processing the sliding mode surface value to generate a display control instruction; and a display driving module for driving changes in the internal display state based on the display control instruction and mapping them to the platform display output.

[0018] The mechanism of this invention is as follows: It provides a superior display control method for elevators in high-end industrial scenarios such as nuclear power plants, which can achieve fast, accurate, smooth, and jitter-free operation under strong interference environments and can intelligently adapt to different operating stages. Beneficial effects: By continuously calculating the error and rate of change between the target display position and the internal display state, and constructing a sliding surface based on sliding mode control theory, the error can be quickly converged, significantly improving the display's tracking accuracy and response speed.

[0019] The inherent robustness of sliding mode control makes it insensitive to parameter changes and external disturbances. By using a saturation function to process the sliding surface value, the chattering phenomenon that may be caused by traditional sliding mode control is effectively suppressed, ensuring the smoothness and stability of the displayed output.

[0020] By designing an adaptive convergence factor selection mechanism based on error amplitude, convergence can be accelerated when the error is large, while stability is emphasized when the error is small. In particular, when the platform is detected to be entering the docking phase, adjusting the locking gain can significantly accelerate the convergence process of the internal display state to the final target position, achieving fast and overshoot-free accurate positioning display.

[0021] The entire control process dynamically adjusts the control parameters (convergence factor, control gain) based on state information such as error and operating speed, so that the system can maintain good control performance under different operating stages and error conditions, demonstrating excellent adaptive capability. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of one embodiment of the display control method for an elevator according to the present invention; Figure 2 This is a schematic diagram of one embodiment of the lifting mechanism in this invention. Figure 3 This is a schematic diagram of another embodiment of the lifting mechanism; Figure 4 This is a schematic diagram of one embodiment of the display control system for the elevator in this invention. Figure 5 This is a schematic diagram of one embodiment of the display control device for the elevator in this invention. Detailed Implementation

[0023] This invention provides a display control system and method for an elevator, which improves the tracking performance and stability of the display system. The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in a sequence other than that illustrated or described herein. Furthermore, the terms "comprising" or "having" and any variations thereof are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or devices.

[0024] For ease of understanding, the specific process of the embodiments of the present invention is described below. Please refer to [link / reference]. Figure 1 , Figure 2 and Figure 3 One embodiment of the display control method for the elevator in this invention includes: 101. Determine the display positions of continuous targets corresponding to the physical positions of the elevator platform.

[0025] It is understood that the executing entity of this invention can be the display control system of an elevator, or it can be a terminal or a server; no specific limitation is made here. This embodiment of the invention will be described using a server as the executing entity as an example.

[0026] Specifically, the real-time physical position and running speed direction of the elevator platform are obtained; based on the running speed direction, the target position to which the platform is currently moving is determined; based on the real-time physical position and the target position, a smooth transition position is obtained by combining a preset transition function; and the smooth transition position is output as a continuous target display position.

[0027] It should be noted that in a certain elevator system, the standard floor height is set at 3 meters. Specifically, the physical height of the first floor corresponds to 0 meters, the second floor to 3 meters, the third floor to 6 meters, and the fourth floor to 9 meters.

[0028] The elevator's display and control system uses an absolute encoder inside the elevator shaft to collect real-time data showing the platform's current physical height is 6.75 meters. Simultaneously, the system reads the traction motor's operating status parameters to confirm that the platform's current operating direction is upward, and its instantaneous operating speed is 1.5 meters per second.

[0029] Based on the upward running speed and the current physical position of 6.75 meters, the system performs logical deduction. Since the platform has already crossed the 6-meter baseline corresponding to the third floor and is continuing to move upward, the system determines that the next standard physical docking point the platform is currently heading towards is the fourth floor. The system then establishes the height corresponding to the fourth floor—9 meters—as the current target position.

[0030] This is the most crucial smoothing step in this process. At this point, the system clearly indicates that the platform is within the operating range between the third floor (6 meters) and the fourth floor (9 meters). The platform has physically traveled a distance of 0.75 meters, which is exactly one-quarter (25%) of the total distance between the two floors.

[0031] The display screen is directly hooked to this physical location. When the elevator accelerates or encounters slight unevenness in the guide rails, the numbers on the screen will appear to stutter or jump visually. To eliminate this phenomenon, the system internally calls a preset S-shaped smooth transition curve as a transition function. Based on the characteristics of this S-shaped curve, the change in values ​​is deliberately slowed down during the initial phase of switching.

[0032] Under this specific transition function rule, the system maps 25% of the physical travel distance to 10% of the visual logical proportion. Next, the system calculates 10% of this three-meter spacing, resulting in a smooth increment of 0.3 meters. This increment is then superimposed on the 6-meter base height of the three-story structure, yielding the current smooth transition position at 6.3 meters.

[0033] The calculated 6.3 meters is output as the continuous target display position within the current control cycle. This 6.3 meters is no longer the platform's actual position with fluctuations, but a highly smooth and logically consistent ideal target value prepared for the display.

[0034] 102. Obtain the error between the target display position and the internal display state.

[0035] Specifically, the difference between the target display position and the internal display state is calculated to obtain the current error value; the error change rate is determined based on the time change of the current error value; and the error quantity is formed based on the current error value and the error change rate. Further, the current error value recorded in adjacent control cycles is obtained; the time difference between adjacent control cycles is calculated; and the error change rate is determined based on the difference in the current error value within adjacent control cycles and the time difference.

[0036] It should be noted that, continuing the scenario from the previous stage: the elevator is moving from the third floor to the fourth floor, and the system has already obtained the current smooth continuous target display position of 6.3 meters in step 101.

[0037] The elevator's display control system operates at a refresh rate of ten times per second, meaning the time difference between two adjacent control cycles is 0.1 seconds. Internally, the system maintains a physical dimension variable called "internal display state," which represents the current physical height of the screen. At this moment, the internal display state value is recorded as 6.1 meters.

[0038] Extract the target display position (6.3 meters) transmitted in step 101, and read the current internal display status of the system (6.1 meters).

[0039] Subtract the internal display state from the target display position to calculate the difference. Specifically, subtract 6.1 meters from 6.3 meters to get 0.2 meters. This 0.2 meters is the current error value, representing that the current display progress of the system is 0.2 meters behind the ideal smooth trajectory.

[0040] To determine the trend of error changes, historical data needs to be reviewed. The system retrieves the error value recorded in the immediately preceding control cycle from the cache. Assume that in the calculation 0.1 seconds ago, the previously recorded current error value was 0.15 meters. Simultaneously, the system confirms that the time difference between the current calculation and the previous calculation for adjacent control cycles is 0.1 seconds.

[0041] Subtracting the previously recorded error value (0.15 meters) from the current error value (0.2 meters) yields a difference of 0.05 meters. This indicates that the system's lag has increased by 0.05 meters in the past 0.1 seconds. Dividing this 0.05-meter difference by the control cycle time difference of 0.1 seconds, the error change rate is calculated to be 0.5 meters per second.

[0042] The current error value (0.2 meters), which reflects the current deviation distance, is combined with the error change rate (0.5 meters per second), which reflects the deviation trend, to form an error quantity state set.

[0043] 103. Obtain the sliding surface value based on the error quantity and sliding mode control theory.

[0044] Specifically, the current error value and error rate of change are obtained from the error quantity; the current error value is multiplied by a preset convergence factor to obtain an error adjustment term; the error adjustment term is added to the error rate of change to obtain the sliding surface value. Further, the error amplitude of the current error value is obtained; the error amplitude is compared with a preset amplitude threshold to obtain an amplitude comparison signal; based on the amplitude comparison signal, a corresponding convergence factor is selected from a set of preset convergence factor values ​​as the actual application convergence factor; the current error value is multiplied by the actual application convergence factor to obtain the error adjustment term.

[0045] It should be noted that, continuing with the aforementioned scenario: in the initial stage of the elevator moving from the third floor to the fourth floor, the system has already calculated the current error value to be 0.2 meters in step 102, and the error change rate is 0.5 meters per second.

[0046] In the system's underlying configuration, a set of convergence factors is preset to adjust the convergence speed. To prevent image jitter when the error is small, the system sets an amplitude threshold of 0.15 meters. Simultaneously, two convergence factors are preset: a value of 2 for small errors and a value of 4 for large errors.

[0047] The current error value (0.2 meters) is extracted, and its absolute value is taken as the error amplitude. Subsequently, the system compares this 0.2-meter amplitude with the preset amplitude threshold (0.15 meters). Since 0.2 meters is greater than 0.15 meters, the system determines that the lag of the current display image is already in a large error state, and thus obtains an amplitude comparison signal representing that it exceeds the threshold.

[0048] Based on the threshold-exceeding signal just obtained, the system clearly understands that a stronger correction force is needed. Therefore, the system abandons the value 2 used for mild adjustment from the preset convergence factor set and decisively selects the value 4 as the current convergence factor for practical application.

[0049] After selecting the convergence factor, the system multiplies the original current error value (0.2 meters) with the selected practical application convergence factor (value 4). This multiplication yields a value of 0.8. This 0.8 is called the error adjustment term; it effectively amplifies the simple spatial distance error and transforms it into the base value of the compensation force that the system needs to apply.

[0050] The error adjustment term (0.8) just calculated is directly added to the error change rate (0.5 meters per second) obtained in step 102. The calculated value is 1.3, which is the sliding surface value output in this step. This clearly conveys an instruction to the next step: the current display state is seriously lagging and the situation is deteriorating, and a strong positive physical drive instruction must be output subsequently.

[0051] 104. Process the sliding surface value using a saturation function to generate display control commands.

[0052] Specifically, the sliding mode surface value and a preset boundary layer thickness parameter are obtained; the ratio of the sliding mode surface value to the boundary layer thickness parameter is calculated to obtain a normalized parameter; the normalized parameter is input into a saturation function for processing to obtain a saturation output value; the saturation output value is multiplied by a preset control gain coefficient to obtain a display control command. Further, the sign and absolute value information of the normalized parameter are obtained; the absolute value information is compared with the value 1 to obtain an amplitude comparison signal; intermediate control parameters are determined based on the amplitude comparison signal and the sign information; and the intermediate control parameters are used as the saturation output value.

[0053] It should be noted that, continuing the aforementioned scenario: in step 103, the sliding surface value of the current state has been calculated to be 1.3.

[0054] The system obtains the input sliding surface value (1.3) and reads the preset boundary layer thickness parameter. To set a reasonable smoothing buffer, the boundary layer thickness parameter is set to 0.5. The system divides the sliding surface value by the boundary layer thickness parameter (1.3 divided by 0.5) to calculate the normalized parameter as 2.6.

[0055] The normalized parameter (2.6) is decomposed to obtain its sign information (positive, denoted as +1) and absolute value information (2.6). The absolute value 2.6 is compared with the judgment threshold value of 1 to obtain the amplitude comparison signal.

[0056] According to the limiting rule of the saturation function, when the absolute value is greater than 1, the output is forcibly clamped to the maximum limit of its sign direction, and the system locks the intermediate control parameter to +1 as the saturation output value. This means that the system will currently exert upward force with the maximum correction ratio.

[0057] The dimensionless saturation output value (+1) needs to be converted into an actual physical catch-up speed command (in meters per second). The system's preset control gain reference coefficient... It is 0.884 m / s.

[0058] Considering the communication delay when the elevator's main control board sends data to the display control board, directly outputting the full control force might cause overshoot oscillations during the delay period. Therefore, the system uses the following dynamic formula with communication delay compensation to obtain the display control command: ; Parameter substitution and logical analysis: : The display control command obtained (in m / s).

[0059] The base compensation speed is obtained by multiplying the preset base coefficient (0.884m / s) by the saturation output value (+1).

[0060] Delay attenuation compensation factor (dimensionless). The system experiences communication delay. (Set to 0.05s), introduce an anti-vibration damping coefficient. (Set to 2s) -1 The exponent term is calculated to be -0.1, then the attenuation factor e -0.1 Take the exact approximation of 0.905.

[0061] Data output: Perform calculations: (The calculation result is rounded to one decimal place to ensure the smoothness of the transmission downwards).

[0062] The display control command required upward compensation at a physical speed of 0.8 meters per second was successfully obtained, perfectly balancing strong slip pattern correction and anti-delay and anti-shaking.

[0063] 105. Drive the internal display state changes according to the display control instructions and map them to the platform display output.

[0064] Specifically, the display control command is superimposed with the internal display state change rate to obtain the updated internal display state change rate; the value of the internal display state is updated using the updated internal display state change rate; the ratio of the internal display state value to the height is calculated based on the internal display state value to obtain the mapping position; and information and running direction indication are obtained based on the mapping position.

[0065] It should be noted that, continuing with the aforementioned scenario: the current recorded internal display status is 6.1 meters, the control cycle is 0.1 seconds, and the standard floor height is three meters.

[0066] Before receiving a new instruction, the display system itself relies on inertia to have an internal display state change rate (i.e., the physical scrolling speed carried over from the previous cycle), and the current inertial rate is set to 0.2 meters per second.

[0067] The system receives the display control command (0.8 meters per second) from step 104. The system directly superimposes this 0.8-meter control speed with the 0.2-meter inertial speed in the physical dimension to obtain an updated internal display state change rate of 1.0 meters per second.

[0068] The superimposed speed of 1.0 meter per second is multiplied by the time of one control cycle (0.1 seconds) to calculate the physical displacement increment of the screen within this cycle as 0.1 meters. This 0.1-meter increment is then superimposed on the initial state record value (6.1 meters) for this cycle to calculate the updated internal display state value as 6.2 meters. At this point, all calculations remain strictly within the physical height domain.

[0069] Entering the cross-dimensional mapping stage. Dividing the current internal display status value (6.2 meters) by the standard floor height (three meters) yields a ratio of approximately 2.067.

[0070] Considering that the physical height corresponding to the first floor is 0 meters, the system adds a constant of one to the ratio, resulting in a logical layer mapping position of 3.067. This means that the main subject of the current image is still on the third floor, but has shifted towards the fourth floor by 0.67%.

[0071] After the graphics rendering engine obtains layer 3.067, it performs rendering transformation based on the preset UI pixel specifications (setting the total UI height of a single-layer number to 600 pixels). The engine extracts the integer part 3 as the current main display number, extracts the decimal part 0.067, multiplies it by 600 pixels, and obtains a precise screen offset of 40 pixels. It then controls the letter 3 to move upwards by 40 pixels, simultaneously revealing the letter 4 and illuminating the overhead light.

[0072] The specific data flow and changes in dimensions are shown in Table 1 below: Table 1

[0073] 106. Detect whether the elevator platform has entered the platform docking stage; when the platform docking stage is detected, adjust the dynamic process of the internal display state change based on the preset locking gain; use the adjusted dynamic process to drive the internal display state, so that it quickly converges to the precise display position of the target.

[0074] Furthermore, the operating speed of the elevator platform is obtained; the operating speed is compared with a preset speed threshold to obtain a platform status confirmation signal; based on the platform status confirmation signal, the value of the convergence factor used to calculate the sliding surface value is increased; the increased convergence factor is used to obtain a new sliding surface value to accelerate the convergence process of the internal display state towards the target.

[0075] It should be noted that, continuing the previous scenario: the elevator is moving upwards from the third floor, and the platform is already extremely close to the physical stopping point on the fourth floor.

[0076] At this moment, the actual physical position of the elevator platform has reached 8.85 meters, and it is in the final stage of deceleration and approaching the station. To maintain smoothness, the internal display status record value of the system is slightly lagging, remaining at 8.7 meters. The system's underlying preset platform speed threshold is 0.3 meters per second, and the preset platform-specific lock-in gain (amplification convergence factor) value is 12.

[0077] The system reads the encoder data of the traction machine in real time and finds that the instantaneous operating speed of the platform has dropped to 0.2 meters per second. The system compares this speed with the preset platform speed threshold (0.3 meters per second). Because the current speed is below the threshold, the system determines that the platform has disengaged from the deceleration state and officially entered the platform docking stage, and receives a high-priority platform status confirmation signal.

[0078] Before receiving the confirmation signal, the system calculates the sliding surface using a conventional convergence factor (e.g., a value of 4) to maintain a smooth flow. After the signal is triggered, the system immediately adjusts the dynamic control process, abandoning the conventional parameters and instantly increasing the convergence factor used in the calculation from 4 to a locked gain value of 12.

[0079] Using a large convergence factor (12), the system re-evaluates and amplifies the current error. The target fourth floor height is 9.0 meters, the current state is 8.7 meters, and the residual error is 0.3 meters. The 0.3-meter error is amplified by 12 times and transformed into an extremely strong sliding mode driving force. Under this driving force, the system directly crosses the 0.3-meter physical gap in the last control cycle, causing the internal display state to converge instantly and accurately to 9.0 meters, and the screen image is fixed on the fourth floor.

[0080] The differences in control before and after the platform phase are shown in Table 2 below: Table 2

[0081] The display control method of the elevator in the embodiments of the present invention has been described above. The display control system of the elevator in the embodiments of the present invention is described below. Please refer to [link / reference]. Figure 4One embodiment of the display control system for the elevator in this invention includes: a position determination module 201, used to determine a continuous target display position corresponding to the physical position of the elevator platform; an error calculation module 202, used to obtain the error between the target display position and the internal display state; a sliding mode control module 203, used to obtain a sliding mode surface value based on the error; an instruction generation module 204, used to process the sliding mode surface value and generate a display control instruction; and a display driving module 205, used to drive the internal display state change according to the display control instruction and map it to the platform display output.

[0082] Figure 5 This is a schematic diagram of the structure of a display control device for an elevator according to an embodiment of the present invention. The display control device 300 for the elevator can vary considerably due to differences in configuration or performance. The device 300 includes a transmitter 301, a receiver 302, and a processor 303. The processor 303 can also be a controller. Figure 3 The device is designated as "controller / processor 303". Optionally, the device 300 may also include a modem processor 305, which may include an encoder 306, a modulator 307, a decoder 308, and a demodulator 309.

[0083] In one example, transmitter 301 modulates (e.g., analog-to-analog conversion, filtering, amplification, and up-conversion, etc.) the output sample to obtain an uplink signal, which is transmitted via an antenna to an access network device. On the downlink, the antenna receives the downlink signal transmitted by the access network device. Receiver 302 modulates (e.g., filtering, amplification, down-conversion, and digitization, etc.) the signal received from the antenna and provides an input sample. In modem processor 305, encoder 306 receives service data and signaling messages to be transmitted on the uplink and processes (e.g., formatting, encoding, and interleaving) the service data and signaling messages. Modulator 307 further processes (e.g., symbol mapping and modulation) the encoded service data and signaling messages and provides an output sample. Demodulator 309 processes (e.g., demodulates) the input sample and provides a symbol estimate. Decoder 308 processes (e.g., deinterleaving and decoding) the symbol estimate and provides decoded data and signaling messages to device 300. Encoder 306, modulator 307, demodulator 309, and decoder 308 can be implemented by a combined modem processor 305. These units perform processing according to the radio access technology adopted by the radio access network (e.g., LTE and other evolved systems access technologies). It should be noted that when device 300 does not include modem processor 305, the above-mentioned functions of modem processor 305 can also be performed by processor 303.

[0084] The processor 303 controls and manages the operation of the device 300, and is used to execute the processing procedures performed by the device 300 in the above embodiments of this disclosure. For example, the processor 303 is also used to execute various steps of the transmitting or receiving device in the above method embodiments, and / or other steps of the technical solutions described in the embodiments of this disclosure.

[0085] Furthermore, the device 300 may also include a memory 304 for storing program code and data for the device 300.

[0086] Understandable Figure 3 Only a simplified design of device 300 is shown. In practical applications, device 300 can include any number of transmitters, receivers, processors, modem processors, memory, etc., and all devices that can implement the embodiments of this disclosure are within the protection scope of the embodiments of this disclosure.

[0087] The present invention also provides a display control device for an elevator, the display control device for the elevator including a memory and a processor, the memory storing computer-readable instructions, and when the computer-readable instructions are executed by the processor, the processor performs the steps of the display control method for the elevator in the above embodiments.

[0088] The present invention also provides a computer-readable storage medium, which can be a non-volatile computer-readable storage medium or a volatile computer-readable storage medium, wherein the computer-readable storage medium stores instructions that, when the instructions are executed on a computer, cause the computer to perform the steps of the display control method for the elevator.

[0089] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0090] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0091] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. 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. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A display control method for an elevator, characterized in that, include: Determine the display positions of continuous targets corresponding to the physical location of the elevator platform; Obtain the error between the target display position and the internal display state; The sliding surface value is obtained based on the aforementioned error amount; The sliding surface values ​​are processed to generate display control commands; The internal display state changes are driven according to the display control instructions and mapped to the platform display output.

2. The display control method for an elevator according to claim 1, characterized in that, include: Calculate the difference between the target display position and the internal display state to obtain the current error value; The error change rate is determined based on the time change of the current error value; An error quantity is formed based on the current error value and the error change rate.

3. The display control method for an elevator according to claim 2, characterized in that, include: Obtain the current error value recorded within the adjacent control cycle; Calculate the time difference between the adjacent control cycles; The error change rate is determined based on the difference between the current error value and the adjacent control cycles, as well as the time difference.

4. The display control method for an elevator according to claim 2, characterized in that, include: Obtain the current error value and error rate of change from the error quantity; An error adjustment term is obtained based on the current error value and a preset convergence factor; The error adjustment term is added to the error change rate to obtain the sliding surface value.

5. The display control method for an elevator according to claim 4, characterized in that, The step of obtaining the error adjustment term based on the current error value and a preset convergence factor includes: Obtain the error magnitude of the current error value; The error amplitude is compared with a preset amplitude threshold to obtain an amplitude comparison signal; Based on the amplitude comparison signal, a corresponding convergence factor is selected from a set of preset convergence factor values ​​as the convergence factor for practical application. An error adjustment term is obtained based on the current error value and the actual application convergence factor.

6. The display control method for an elevator according to claim 4, characterized in that, include: Obtain the sliding surface value and the preset boundary layer thickness parameter; Calculate the ratio of the sliding surface value to the boundary layer thickness parameter to obtain the normalized parameter; The normalized parameter is input into the saturation function for processing to obtain the saturation output value; The saturated output value is multiplied by a preset control gain coefficient to obtain the display control command.

7. The display control method for an elevator according to claim 6, characterized in that, include: The display control command is superimposed with the internal display state change rate to obtain the updated internal display state change rate; Update the value of the internal display state using the updated internal display state change rate; The mapping position is obtained by calculating the ratio of the internal display status value to the height. Information and direction of travel are obtained based on the mapped location.

8. The display control method for an elevator according to claim 1, characterized in that, Also includes: Detect whether the elevator platform has entered the platform docking stage; When the platform docking phase is detected, the internal display state is dynamically adjusted based on a preset locking gain. The internal display state is driven by an adjusted dynamic process, which quickly converges to the precise display position of the target.

9. The display control method for an elevator according to claim 8, characterized in that, include: Obtain the operating speed of the elevator platform; The operating speed is compared with a preset speed threshold to obtain a platform status confirmation signal; Based on the platform status confirmation signal, increase the value of the convergence factor used to calculate the sliding surface value; The increased convergence factor is used to obtain a new sliding surface value, thereby accelerating the convergence process of the internal display state towards the target.

10. A display control system for an elevator, characterized in that, The display control system of the elevator includes: The position determination module is used to determine the continuous target display positions corresponding to the physical positions of the elevator platform; The error calculation module is used to obtain the amount of error between the target display position and the internal display state; The sliding mode control module is used to obtain the sliding mode surface value based on the error amount; The instruction generation module is used to process the sliding surface values ​​and generate display control instructions; The display driver module is used to drive changes in the internal display state according to the display control instructions and map them to the platform display output.

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