A transmission ratio detection method, a transmission ratio detection device, and a storage medium

Abstract

This application discloses a transmission ratio detection method, a transmission ratio detection device, and a storage medium for use in the field of elevator control technology. The method includes: learning and using the direction parameters of the encoder in the elevator and the magnetic pole angle information corresponding to the zero-position pulse signal in the encoder to ensure the normal operation of the elevator; during the normal operation of the elevator, the target pulse number between two zero-position pulse signals of the traction sheave can be accurately obtained; based on the target pulse number of the traction sheave and the pulse line number of the encoder, the transmission ratio between the friction wheel of the traction sheave and the encoder can be accurately determined, ensuring normal control of the motor operation.

Description

Technical Field

[0001] This application relates to the field of elevator control technology, and in particular to a transmission ratio detection method, a transmission ratio detection device, and a storage medium. Background Technology

[0002] Existing disc motors transform rotating magnetic fields into traveling wave magnetic fields that move horizontally, forming an innovative planar linear ring motor. The thin, large permanent magnets in the disc motor can achieve greater magnetic excitation. The rotor and stator have the same diameter and are parallel, and the diameter of the traction sheave integrated with the rotor is always smaller than the rotor diameter, thus easily obtaining greater torque.

[0003] Disc motors are widely used in the elevator industry. The encoder is usually installed on the side of the elevator motor traction sheave. The encoder's friction wheel ensures that the encoder's rotation is synchronized with the motor traction sheave's operation. A photoelectric switch is installed on the motor traction sheave to detect the motor's absolute position signal. This absolute position signal generates a zero-position pulse signal for each revolution, which is used to correct the motor's magnetic pole position.

[0004] Because the encoder is not coaxially mounted, the elevator control system needs the transmission ratio information to control the motor operation normally. Currently, the transmission ratio information is mainly obtained by measuring the diameter of the encoder's friction wheel and the traction wheel. However, during elevator operation, both the encoder's friction wheel and the traction wheel are prone to wear, resulting in a certain deviation between the diameters of the friction wheel and the traction wheel. At this time, the elevator control system will have difficulty accurately obtaining the transmission ratio information and will be unable to control the motor operation normally. Summary of the Invention

[0005] This application provides a transmission ratio detection method, a transmission ratio detection device, and a storage medium, which can accurately obtain transmission ratio information and ensure normal control of motor operation.

[0006] This application provides a method for detecting transmission ratio, including:

[0007] During the elevator self-learning process, when the elevator is controlled to run in a preset direction based on a given frequency, the encoder installed on the elevator's traction sheave detects the first accumulated pulse between two adjacent zero-position pulse signals; based on the sign of the given frequency and the sign of the first accumulated pulse, the direction parameters of the encoder are determined and saved; wherein, the zero-position pulse signal is the pulse signal output by the traction sheave for each revolution.

[0008] When the elevator is controlled to run in a set direction opposite to the preset direction, when a valid target zero-position pulse signal is detected, the current first magnetic pole angle information of the encoder is saved; when an invalid target zero-position pulse signal is detected, the current second magnetic pole angle information of the encoder is saved.

[0009] Based on the encoder's direction parameters, the first magnetic pole angle information, and the second magnetic pole angle information, the elevator is controlled to operate normally at a stable speed.

[0010] During normal operation of the elevator, the target pulse number of the traction sheave is determined based on the second accumulated pulse between two adjacent zero-position pulse signals detected by the encoder; the transmission ratio between the traction sheave and the friction wheel of the encoder is determined based on the target pulse number of the traction sheave and the pulse line number of the encoder.

[0011] Furthermore, controlling the elevator to run in a preset direction based on a given frequency includes:

[0012] Before the elevator gate is opened, the excitation current of the elevator is increased to a given excitation current based on a preset increase time.

[0013] After the elevator gate is opened, the elevator's operating frequency is accelerated to the given frequency based on a preset acceleration time, and the elevator is controlled to run in a preset direction based on the given frequency and the given excitation current.

[0014] Furthermore, determining the encoder's direction parameters based on the sign of the given frequency and the sign of the first accumulated pulse includes:

[0015] If the sign of the given frequency is the same as the sign of the first accumulated pulse, then the direction parameter of the encoder is determined to be that the encoder is in a normal direction.

[0016] When the sign of the given frequency is opposite to the sign of the first accumulated pulse, the direction parameter of the encoder is determined to be the reverse direction of the encoder.

[0017] Furthermore, based on the direction parameters of the encoder, controlling the elevator to operate normally at a stable speed includes:

[0018] When the direction parameter of the encoder is the reverse direction of the encoder, the phase sequence of the two quadrature pulse signals of the encoder is swapped.

[0019] When the encoder's direction parameter is normal, the phase sequence of the two orthogonal pulse signals encoded is saved.

[0020] Furthermore, based on the first magnetic pole angle information and the second magnetic pole angle information, controlling the elevator to operate normally at a stable speed includes:

[0021] If the current running direction of the elevator is the same as the set direction, the first magnetic pole angle information is used to correct the magnetic pole angle corresponding to the encoder when the zero-position pulse signal is valid;

[0022] If the current running direction of the elevator is opposite to the set direction, the second magnetic pole angle information is used to correct the magnetic pole angle of the encoder when the zero-position pulse signal is valid.

[0023] Furthermore, determining the target pulse number of the traction sheave based on the second accumulated pulse between two adjacent zero-position pulse signals detected by the encoder includes:

[0024] Based on the encoder, multiple second accumulated pulses corresponding to two adjacent zero-position pulse signals are detected during a single operation of the elevator; wherein, the single operation is one operation process of the elevator from starting to stopping;

[0025] The target number of pulses for the traction sheave is obtained by averaging the multiple second accumulated pulses.

[0026] Furthermore, determining the transmission ratio between the friction wheel of the traction sheave and the encoder based on the target pulse number of the traction sheave and the pulse line number of the encoder includes:

[0027] The transmission ratio between the friction wheel of the traction sheave and the encoder is obtained by dividing the target number of pulses of the traction sheave by the number of pulse lines of the encoder.

[0028] This application embodiment also provides a transmission ratio detection device, including:

[0029] The first storage unit is used to control the elevator to run in a preset direction based on a given frequency during the elevator self-learning process, and to detect the first accumulated pulse between two adjacent zero-position pulse signals based on the encoder installed on the elevator's traction sheave; and to determine and store the direction parameters of the encoder based on the sign of the given frequency and the sign of the first accumulated pulse; wherein the zero-position pulse signal is the pulse signal output by the traction sheave for each revolution.

[0030] The second storage unit is used to control the elevator to run in a set direction opposite to the preset direction. When the target zero-position pulse signal is detected to be valid, the unit stores the current first magnetic pole angle information of the encoder. When the target zero-position pulse signal is detected to be invalid, the unit stores the current second magnetic pole angle information of the encoder.

[0031] The control unit is used to control the elevator to operate normally at a stable speed based on the direction parameters of the encoder, the first magnetic pole angle information, and the second magnetic pole angle information.

[0032] The determining unit is configured to, during normal operation of the elevator, determine the target pulse number of the traction sheave based on the second accumulated pulse between two adjacent zero-position pulse signals detected by the encoder; and determine the transmission ratio between the traction sheave and the friction wheel of the encoder based on the target pulse number of the traction sheave and the pulse line number of the encoder.

[0033] This application embodiment also provides a transmission ratio detection device, including:

[0034] Central processing unit, memory, input / output interface, wired or wireless network interface, power supply;

[0035] The memory is either a short-term storage memory or a persistent storage memory;

[0036] The central processing unit is configured to communicate with the memory and execute instructions in the memory on a control plane functional entity to perform the methods described above.

[0037] This application also provides a computer-readable storage medium including instructions that, when executed on a computer, cause the computer to perform the method described above.

[0038] As can be seen from the above technical solutions, the embodiments of this application have the following advantages:

[0039] In this embodiment, during elevator self-learning, when the elevator is controlled to run in a preset direction based on a given frequency, the encoder installed on the elevator's traction sheave detects the first accumulated pulse between two adjacent zero-position pulse signals; based on the sign of the given frequency and the sign of the first accumulated pulse, the encoder's direction parameters are determined and saved; when the elevator is controlled to run in a set direction opposite to the preset direction, when a valid target zero-position pulse signal is detected, the encoder's current first magnetic pole angle information is saved; when an invalid target zero-position pulse signal is detected, the encoder's current second magnetic pole angle information is saved; based on the encoder's direction parameters, the first magnetic pole angle information, and the second magnetic pole angle information, the elevator is controlled to run normally at a stable speed; during normal elevator operation, based on the second accumulated pulse between two adjacent zero-position pulse signals detected by the encoder, the target pulse count of the traction sheave is determined; based on the target pulse count of the traction sheave and the number of pulse lines of the encoder, the transmission ratio between the traction sheave and the encoder's friction wheel is determined.

[0040] As can be seen, in this embodiment of the application, by learning and using the direction parameters of the encoder in the elevator and the magnetic pole angle information corresponding to the zero-position pulse signal in the encoder, the normal operation of the elevator is ensured; during the normal operation of the elevator, the target number of pulses between the two zero-position pulse signals of the traction sheave can be accurately obtained. Based on the target number of pulses of the traction sheave and the number of pulse lines of the encoder, the transmission ratio between the friction wheel of the traction sheave and the encoder can be accurately determined, ensuring normal control of the motor operation. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings.

[0042] Figure 1 This is a flowchart of a transmission ratio detection process disclosed in an embodiment of this application;

[0043] Figure 2 This is a schematic diagram of a transmission ratio detection device disclosed in an embodiment of this application;

[0044] Figure 3 This is a schematic diagram of another transmission ratio detection device disclosed in an embodiment of this application. Detailed Implementation

[0045] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0046] In the description of the embodiments of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0047] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0048] Currently, disc motors are widely used in the elevator industry. In these motors, the encoder is usually installed on the side of the elevator motor traction sheave. The encoder's friction wheel ensures that the encoder's rotation is synchronized with the operation of the motor traction sheave. A photoelectric switch is installed on the motor traction sheave to detect the absolute position signal of the motor. This absolute position signal generates a zero-position pulse signal for each revolution, which is used to correct the position of the motor's magnetic poles.

[0049] Because the encoder is not coaxially mounted, the elevator control system needs transmission ratio information to properly control the motor. Currently, this information is mainly obtained by measuring the diameters of the encoder's friction wheel and traction sheave. However, during elevator operation, both the encoder's friction wheel and traction sheave are prone to wear, leading to deviations in their diameters. In this case, the elevator control system will struggle to accurately obtain the transmission ratio information and cannot properly control the motor. Therefore, this application discloses a transmission ratio detection method that can accurately obtain transmission ratio information, ensuring proper motor control. Figure 1 As shown, the specific steps include the following:

[0050] 101. When the elevator is controlled to run in a preset direction based on a given frequency, the encoder installed on the elevator's traction sheave detects the first accumulated pulse between two adjacent zero-position pulse signals.

[0051] In this embodiment, during the elevator self-learning process, when the elevator is controlled to run in a preset direction based on a given frequency, the first accumulated pulse between two adjacent zero-position pulse signals can be detected by an encoder installed on the elevator's traction sheave. The preset direction of operation can be either upward or downward movement of the elevator, which is not specifically limited here. The zero-position pulse signal (Z signal) is the pulse signal output per revolution of the traction sheave. The zero-position pulse signal can be: low level for invalid state, high level for valid state, or high level for invalid signal, low level for valid signal, which is not specifically limited here. A photoelectric switch on the elevator traction sheave can trigger a zero-position pulse signal when the traction sheave completes one revolution.

[0052] Before the elevator brake is released, the elevator's excitation current can be increased to a given excitation current based on a preset increase time. This preset increase time can be 100ms or 200ms, and the specific duration is not limited here. For example, the excitation current can be increased from zero to a given excitation current of 20A within 100ms. After the elevator brake is released, if the elevator triggers an open brake command, the elevator's operating frequency is accelerated to a given frequency based on a preset acceleration time. Based on the given frequency and the given excitation current, the elevator is controlled to run in a preset direction.

[0053] Specifically, the encoder installed on the traction sheave of the elevator detects the first accumulated pulse between two adjacent zero-position pulse signals as follows: when the elevator is running in a preset direction, after the photoelectric switch detects that the zero-position pulse signal is valid, it starts to accumulate the number of pulses detected by the encoder until the next zero-position pulse signal is detected, and the corresponding first accumulated pulse is obtained.

[0054] 102. Based on the symbol of the given frequency and the symbol of the first accumulated pulse, determine and save the encoder's direction parameters.

[0055] In this embodiment, after obtaining the first accumulated pulse, the encoder's direction parameters can be determined and saved based on the sign of the given frequency and the sign of the first accumulated pulse. The encoder's direction is represented by the phase sequence between orthogonal pulse signals (phase A and phase B), such as phase A leading phase B, or phase B leading phase A. The sign of the first accumulated pulse can be positive or negative. For example, if the number of pulses when the next zero-position pulse signal is detected decreases compared to the number of pulses when the previous zero-position pulse signal was detected, then the sign of the first accumulated pulse is determined to be negative; if the number of pulses when the next zero-position pulse signal is detected increases compared to the number of pulses when the previous zero-position pulse signal was detected, then the sign of the first accumulated pulse is determined to be positive.

[0056] Specifically, if the sign of the given frequency is the same as the sign of the first accumulated pulse, the encoder's direction parameter is determined to be normal; if the given frequency is positive and the first accumulated pulse is positive, the encoder's direction is determined to be normal; if the given frequency is negative and the first accumulated pulse is negative, the encoder's direction is determined to be normal. Conversely, if the sign of the given frequency is opposite to the sign of the first accumulated pulse, the encoder's direction parameter is determined to be reversed; if the given frequency is positive and the first accumulated pulse is negative, the encoder's direction is determined to be reversed; if the given frequency is negative and the first accumulated pulse is positive, the encoder's direction is determined to be reversed.

[0057] Once the encoder's direction parameters are saved, the elevator can be controlled to decelerate to zero speed, close the brake, and stop.

[0058] 103. When the target zero-position pulse signal is detected to be valid, save the current first magnetic pole angle information of the encoder. When the target zero-position pulse signal is detected to be invalid, save the current second magnetic pole angle information of the encoder.

[0059] When controlling the elevator to run in a direction opposite to the preset direction, if a valid target zero-position pulse signal is detected, the encoder's current first magnetic pole angle information is saved; if an invalid target zero-position pulse signal is detected, the encoder's current second magnetic pole angle information is saved. The target zero-position pulse signal is any zero-position pulse signal triggered by the traction sheave when the elevator is running in the preset direction. That is, when controlling the elevator to run in the opposite direction, based on closed-loop vector control, at the instant the photoelectric switch detects a valid target zero-position pulse signal, the current first magnetic pole angle information can be obtained based on the voltage equation of the permanent magnet synchronous motor rotating coordinate system and saved to the control system as the magnetic pole zero point signal (i.e., the starting position) of the target zero-position pulse signal. Since the photoelectric switch has a certain effective distance, the corresponding target zero-position pulse signal has a certain effective width. When the target zero-position pulse signal crosses the effective width, i.e., when the target zero-position pulse signal is detected as invalid, the encoder's current second magnetic pole angle information can be saved.

[0060] After the elevator has learned the encoder's direction parameters, first magnetic pole angle information, and second magnetic pole angle information, it controls the elevator to decelerate to zero speed, closes the brake, stops the machine, and ends the self-learning process.

[0061] 104. Based on the encoder's direction parameters, the first magnetic pole angle information, and the second magnetic pole angle information, the elevator is controlled to operate normally at a stable speed.

[0062] Next, based on the encoder's direction parameters, the first magnetic pole angle information, and the second magnetic pole angle information, the elevator can be controlled to operate normally at a stable speed.

[0063] Specifically, when the encoder's direction parameter indicates that the encoder is in the reverse direction, the phase sequence of the two quadrature pulse signals of the encoder is swapped; that is, the phase sequence of phase A and phase B in the encoder is swapped. When the encoder's direction parameter indicates that the encoder is in the normal direction, the phase sequence of the two quadrature pulse signals of the encoder is saved. By self-learning the encoder's direction parameter, the elevator is controlled to operate normally at a stable speed based on the encoder's direction parameter. This eliminates the need for manual setting of the encoder direction or external detection and modification of the encoder direction, effectively improving the accuracy of the encoder direction during normal elevator operation.

[0064] Specifically, if the elevator's current running direction is the same as the set direction, the first magnetic pole angle information is used to correct the encoder's magnetic pole angle when the zero-position pulse signal is valid; if the elevator's current running direction is opposite to the set direction, the second magnetic pole angle information is used to correct the encoder's magnetic pole angle when the zero-position pulse signal is valid. That is, during normal elevator operation, when a zero-position pulse signal is triggered, if the elevator's current running direction is the same as the set direction, the first magnetic pole angle information is used to correct the encoder's magnetic pole angle; if the elevator's current running direction is opposite to the set direction, the second magnetic pole angle information is used to correct the encoder's magnetic pole angle.

[0065] 105. Based on the second accumulated pulse between two adjacent zero-position pulse signals detected by the encoder, determine the target pulse number of the traction wheel.

[0066] Understandably, during normal elevator operation, the elevator encoder's friction wheel and traction wheel measure speed through friction. After prolonged operation, the traction wheel will experience frictional wear, causing the diameter of the encoder's friction wheel to shorten. If the deviation is too large, the encoder will be unable to accurately detect the motor's magnetic pole position information, requiring manual retuning to re-acquire the transmission ratio data between the elevator traction wheel and the encoder's friction wheel, which is time-consuming and labor-intensive.

[0067] Therefore, in this embodiment, the target pulse number of the traction wheel is determined based on the second accumulated pulse between two adjacent zero-position pulse signals detected by the encoder. Based on the target pulse number of the traction wheel and the pulse line number of the encoder, the transmission ratio between the traction wheel and the friction wheel of the encoder is determined, which effectively avoids deviations caused by friction and improves the rate of obtaining the transmission ratio.

[0068] Specifically, based on an encoder, multiple second accumulated pulses corresponding to two adjacent zero-position pulse signals can be detected during a single elevator operation; a single operation refers to one run of the elevator from start to stop. The target pulse count for the traction sheave is obtained by averaging the multiple second accumulated pulses. That is, during a single elevator operation, multiple second accumulated pulses are stored sequentially in an array, with older data automatically overwritten. When the elevator stops, all the multiple second accumulated pulses are stored in the array, and the sum of these pulses is taken as the target pulse count for the traction sheave. This array can be located in the RAM within the elevator control system chip and can store 1024 second accumulated pulses. The more second accumulated pulses stored in the array, the better the anti-interference capability and the more accurate the target pulse count for the traction sheave.

[0069] 106. Based on the target pulse number of the traction sheave and the pulse line number of the encoder, determine the transmission ratio between the friction wheel of the traction sheave and the encoder.

[0070] In this embodiment, the transmission ratio between the traction sheave and the encoder's friction wheel can be determined based on the target pulse count of the traction sheave and the pulse line count of the encoder; wherein, the pulse line count refers to the number of lines on the encoder's photoelectric code disk; the transmission ratio is the ratio of the rotational speeds between the traction sheave and the encoder's friction wheel. Specifically, the transmission ratio between the traction sheave and the encoder's friction wheel can be obtained by dividing the target pulse count of the traction sheave by the pulse line count of the encoder.

[0071] As can be seen, in this embodiment of the application, by learning and using the direction parameters of the encoder in the elevator and the magnetic pole angle information corresponding to the zero-position pulse signal in the encoder, the normal operation of the elevator is ensured; during the normal operation of the elevator, the target number of pulses between the two zero-position pulse signals of the traction sheave can be accurately obtained. Based on the target number of pulses of the traction sheave and the number of pulse lines of the encoder, the transmission ratio between the friction wheel of the traction sheave and the encoder can be accurately determined, ensuring normal control of the motor operation.

[0072] This application also provides a transmission ratio detection device, such as... Figure 2 As shown, it includes:

[0073] The first storage unit 201 is used to control the elevator to run in a preset direction based on a given frequency during the elevator self-learning process, and to detect the first accumulated pulse between two adjacent zero-position pulse signals based on the encoder installed on the elevator's traction sheave; and to determine and store the direction parameters of the encoder based on the sign of the given frequency and the sign of the first accumulated pulse; wherein the zero-position pulse signal is the pulse signal output by the traction sheave for each revolution.

[0074] The second storage unit 202 is used to control the elevator to run in a set direction opposite to the preset direction. When the target zero-position pulse signal is detected to be valid, the current first magnetic pole angle information of the encoder is stored. When the target zero-position pulse signal is detected to be invalid, the current second magnetic pole angle information of the encoder is stored.

[0075] Control unit 203 is used to control the elevator to operate normally at a stable speed based on the direction parameters of the encoder, the first magnetic pole angle information and the second magnetic pole angle information;

[0076] The determining unit 204 is used to determine the target pulse number of the traction sheave based on the second accumulated pulse between two adjacent zero-position pulse signals detected by the encoder during normal operation of the elevator; and to determine the transmission ratio between the traction sheave and the friction wheel of the encoder based on the target pulse number of the traction sheave and the pulse line number of the encoder.

[0077] This application embodiment also provides a transmission ratio detection device 300, such as Figure 3 As shown, the transmission ratio detection device 300 of this application embodiment may include one or more central processing units (CPUs) 301 and a memory 302, wherein the memory 302 stores one or more application programs or data.

[0078] The memory 302 can be volatile or persistent storage. The program stored in the memory 302 can include one or more modules, each module can include a series of instruction operations on the electronic device. Furthermore, the central processing unit 301 can be configured to communicate with the memory 302 and execute the series of instruction operations in the memory 302 on the transmission ratio detection device 300.

[0079] The transmission ratio detection device 300 may also include one or more power supplies 305, one or more wired or wireless network interfaces 304, one or more input / output interfaces 303, and / or one or more operating systems, such as Windows Server™, Mac OS X™, Unix™, Linux™, FreeBSD™, etc.

[0080] The central processing unit 301 can perform the operations performed by the first aspect or any specific method embodiment of the first aspect, which will not be described in detail here.

[0081] This application also provides a computer-readable storage medium including instructions that, when executed on a computer, cause the computer to perform the method described above.

[0082] 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.

[0083] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection between apparatuses or units through some interfaces, and may be electrical, mechanical, or other forms.

[0084] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0085] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0086] 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 this application, 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 this application. 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.

Claims

1. A method for detecting transmission ratio, characterized in that, include: During the elevator self-learning process, the elevator is controlled to run in a preset direction based on a given frequency, and the encoder installed on the elevator's traction sheave detects the first accumulated pulse between two adjacent zero-position pulse signals. Based on the sign of the given frequency and the sign of the first accumulated pulse, the direction parameters of the encoder are determined and saved; wherein, the zero-position pulse signal is the pulse signal output by the traction sheave for each revolution; When the elevator is controlled to run in a set direction opposite to the preset direction, when a valid target zero-position pulse signal is detected, the current first magnetic pole angle information of the encoder is saved; when an invalid target zero-position pulse signal is detected, the current second magnetic pole angle information of the encoder is saved. Based on the encoder's direction parameters, the first magnetic pole angle information, and the second magnetic pole angle information, the elevator is controlled to operate normally at a stable speed. During normal operation of the elevator, the target pulse number of the traction sheave is determined based on the second accumulated pulse between two adjacent zero-position pulse signals detected by the encoder; the transmission ratio between the traction sheave and the friction wheel of the encoder is determined based on the target pulse number of the traction sheave and the pulse line number of the encoder.

2. The transmission ratio detection method according to claim 1, characterized in that, Controlling the elevator to run in a preset direction based on a given frequency includes: Before the elevator gate is opened, the excitation current of the elevator is increased to a given excitation current based on a preset increase time. After the elevator gate is opened, the elevator's operating frequency is accelerated to the given frequency based on a preset acceleration time, and the elevator is controlled to run in a preset direction based on the given frequency and the given excitation current.

3. The transmission ratio detection method according to claim 1, characterized in that, Determining the encoder's direction parameters based on the sign of the given frequency and the sign of the first accumulated pulse includes: If the sign of the given frequency is the same as the sign of the first accumulated pulse, then the direction parameter of the encoder is determined to be that the encoder is in a normal direction. When the sign of the given frequency is opposite to the sign of the first accumulated pulse, the direction parameter of the encoder is determined to be the reverse direction of the encoder.

4. The transmission ratio detection method according to claim 1, characterized in that, Based on the direction parameters of the encoder, controlling the elevator to operate normally at a stable speed includes: When the direction parameter of the encoder is the reverse direction of the encoder, the phase sequence of the two quadrature pulse signals of the encoder is swapped. When the encoder's direction parameter is normal, the phase sequence of the two orthogonal pulse signals encoded is saved.

5. The transmission ratio detection method according to claim 1, characterized in that, Based on the first magnetic pole angle information and the second magnetic pole angle information, controlling the elevator to operate normally at a stable speed includes: If the current running direction of the elevator is the same as the set direction, the first magnetic pole angle information is used to correct the magnetic pole angle corresponding to the encoder when the zero-position pulse signal is valid; If the current running direction of the elevator is opposite to the set direction, the second magnetic pole angle information is used to correct the magnetic pole angle of the encoder when the zero-position pulse signal is valid.

6. The transmission ratio detection method according to claim 1, characterized in that, The determination of the target pulse number of the traction sheave based on the second accumulated pulse between two adjacent zero-position pulse signals detected by the encoder includes: Based on the encoder, multiple second accumulated pulses corresponding to two adjacent zero-position pulse signals are detected during a single operation of the elevator; wherein, the single operation is one operation process of the elevator from starting to stopping; The target number of pulses for the traction sheave is obtained by averaging the multiple second accumulated pulses.

7. The transmission ratio detection method according to claim 1, characterized in that, Determining the transmission ratio between the friction wheel of the traction sheave and the encoder based on the target pulse number of the traction sheave and the pulse line number of the encoder includes: The transmission ratio between the friction wheel of the traction sheave and the encoder is obtained by dividing the target number of pulses of the traction sheave by the number of pulse lines of the encoder.

8. A transmission ratio detection device, characterized in that, include: The first storage unit is used to control the elevator to run in a preset direction based on a given frequency during the elevator self-learning process, and to detect the first accumulated pulse between two adjacent zero-position pulse signals based on the encoder installed on the elevator's traction sheave. Based on the sign of the given frequency and the sign of the first accumulated pulse, the direction parameters of the encoder are determined and saved; wherein, the zero-position pulse signal is the pulse signal output by the traction sheave for each revolution; The second storage unit is used to control the elevator to run in a set direction opposite to the preset direction. When the target zero-position pulse signal is detected to be valid, the unit stores the current first magnetic pole angle information of the encoder. When the target zero-position pulse signal is detected to be invalid, the unit stores the current second magnetic pole angle information of the encoder. The control unit is used to control the elevator to operate normally at a stable speed based on the direction parameters of the encoder, the first magnetic pole angle information, and the second magnetic pole angle information. The determining unit is configured to, during normal operation of the elevator, determine the target pulse number of the traction sheave based on the second accumulated pulse between two adjacent zero-position pulse signals detected by the encoder; and determine the transmission ratio between the traction sheave and the friction wheel of the encoder based on the target pulse number of the traction sheave and the pulse line number of the encoder.

9. A transmission ratio detection device, characterized in that, include: Central processing unit, memory, input / output interface, wired or wireless network interface, power supply; The memory is either a short-term storage memory or a persistent storage memory; The central processing unit is configured to communicate with the memory and execute instructions in the memory on a control plane functional entity to perform the method described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes instructions that, when executed on a computer, cause the computer to perform the method as described in any one of claims 1 to 7.

Images