Motor control system, method and device, drying equipment and storage medium

Abstract

The invention provides a motor control system, method and device, drying equipment and a storage medium, relates to the technical field of equipment control, and solves the problem that a mesh belt of the drying equipment in the prior art is prone to being blocked by mud and the like and cannot operate normally. The blockage condition on the transmission mesh belt can be simply, conveniently and accurately detected, and the failure rate of equipment can be reduced.

Description

Technical Field

[0001] The present application relates to the field of equipment control technology, and in particular to a motor control system, method, device, drying equipment and storage medium. Background Art

[0002] Sludge is a byproduct of sewage treatment. The amount of sludge generated in sewage treatment is huge, so it needs to be treated. Among them, the common sludge treatment method is to dry the sludge through drying equipment. In sludge drying equipment, the normal operation of the mesh belt motor is crucial to the entire sludge treatment process. However, in the actual operation process, due to mesh belt gear wear, excessive material or abnormal motor control signal, the mesh belt is prone to abnormal operation and mud blockage, affecting the stable operation of the equipment. Summary of the invention

[0003] The present application provides a motor control system, method, device, drying equipment and storage medium, which solves the problem in the related art that the mesh belt of the drying equipment is prone to blockage such as mud and cannot operate normally. The present solution can simply and accurately complete the detection of blockage on the transmission mesh belt by judging the operating status of the zero-speed switch and the anti-rotation switch, which helps to reduce the failure rate of the equipment.

[0004] In a first aspect, the present application provides a motor control system, which is applied to a drying device, wherein the drying device includes a transmission mesh belt, and a zero-speed switch is provided on the transmission shaft of a mesh belt motor corresponding to the transmission mesh belt, and a rotation-blocking switch is provided at the starting end or the end end of the transmission mesh belt. The motor control system includes:

[0005] A data acquisition module, the data acquisition module is used to collect a first feedback signal corresponding to the zero-speed switch and a second feedback signal corresponding to the anti-rotation switch;

[0006] A main control module, the main control module is connected to the data acquisition module, and the main control module is used to determine a control signal according to a first feedback signal and a second feedback signal provided by the data acquisition module;

[0007] A control output module is connected to the main control module, and the control output module is connected to the mesh belt motor. The control output module is used to control the mesh belt motor according to the control signal.

[0008] In a second aspect, the present application further provides a motor control method, which is applied to the motor control system provided in the first aspect, and the motor control method includes:

[0009] Respectively obtaining a first feedback signal corresponding to the zero-speed switch and a second feedback signal corresponding to the rotation-resistance switch;

[0010] Based on the first feedback signal and the second feedback signal, determining whether there is a congestion according to a preset logic judgment algorithm;

[0011] If there is a blockage, an alarm signal is output to trigger a brake control operation on the mesh belt motor.

[0012] In a third aspect, the present application further provides a motor control device, which is applied to the motor control system provided in the first aspect, and the motor control device includes:

[0013] A signal acquisition module, configured to respectively acquire a first feedback signal corresponding to the zero-speed switch and a second feedback signal corresponding to the anti-rotation switch;

[0014] A congestion determination module, configured to determine whether there is a congestion situation according to a preset logic determination algorithm based on the first feedback signal and the second feedback signal;

[0015] The alarm control module is configured to determine to output an alarm signal if a blockage occurs, so as to trigger a braking control operation on the mesh belt motor.

[0016] In a fourth aspect, the present application further provides a drying device, which includes a transmission mesh belt, and a zero-speed switch is provided on the transmission shaft of the mesh belt motor corresponding to the transmission mesh belt, and a rotation-blocking switch is provided at the starting end or the end end of the transmission mesh belt, and the drying device also includes:

[0017] one or more processors;

[0018] a storage device for storing one or more programs,

[0019] When one or more programs are executed by one or more processors, the one or more processors implement the motor control method of the present application.

[0020] In a fifth aspect, the present application also provides a storage medium storing computer executable instructions, which are used to execute the motor control method of the present application when executed by a processor.

[0021] Through the coordinated judgment of the feedback signals corresponding to the zero-speed switch and the anti-rotation switch, the present application can accurately determine whether there is a blockage, timely and accurately detect and handle mud blockage faults, and effectively reduce the occurrence of misjudgments and missed judgments, thereby effectively improving the operating stability, reliability and intelligence level of the drying equipment, and helping to improve the production efficiency of the drying equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A principle block diagram of a motor control system provided in one embodiment of the present application;

[0023] Figure 2A schematic diagram of the steps of a motor control method provided in one embodiment of the present application;

[0024] Figure 3 A schematic diagram of the structure of a motor control device provided in one embodiment of the present application;

[0025] Figure 4 A schematic diagram of the structure of a drying device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0026] The embodiments of the present application are further described in detail below in conjunction with the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are only used to explain the embodiments of the present application, rather than to limit the embodiments of the present application. It should also be noted that, for ease of description, only the parts related to the embodiments of the present application rather than all structures are shown in the accompanying drawings, and those skilled in the art should be able to think of it after reading the specification of this application that as long as the technical features do not contradict each other, any combination of the technical features can constitute an optional implementation method.

[0027] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable when appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally a class, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally represents that the objects associated before and after are in an "or" relationship. In the description of the present application, "multiple" means two or more, and "several" means one or more.

[0028] The byproducts produced after sewage treatment include sludge, and the amount of industrial sludge produced by industrial sewage treatment in my country is huge, which requires manual treatment of the sludge. The common sludge treatment method is to dry the sludge at high temperature and collect the dried sludge through the corresponding treatment device. In the sludge drying equipment, the normal operation of the mesh belt motor is crucial to the entire sludge treatment process. However, in the actual operation process, due to the wear of the mesh belt gear, excessive material or abnormal motor control signal, the mesh belt is prone to fail to operate normally and mud blockage, which affects the stable operation of the equipment.

[0029] In this regard, the present application provides a motor control system, which is applied to a drying device, and the drying device includes a transmission mesh belt that can be used to transmit sludge. It can be imagined that the transmission mesh belt is driven to rotate by the mesh belt motor thereon to achieve the migration of materials placed on the transmission mesh belt. A zero-speed switch is provided on the transmission shaft of the mesh belt motor. In addition, a rotation-blocking switch is provided at the starting end or the end end of the transmission mesh belt. It can be understood that in a scenario where multiple sections of transmission mesh belts are required to transport sludge, the rotation-blocking switch is equivalent to being located at the mesh belt transmission handover position.

[0030] Among them, the zero-speed switch outputs different signals when the speed of the object to be measured is less than or greater than or equal to the speed of the object to be measured. In this regard, the zero-speed switch can be used to detect the rotation speed of the transmission shaft; and the resistance rotation switch can provide a corresponding signal when its blades are obstructed and the motor stops rotating. In this regard, the resistance rotation switch can be used to detect whether there is material accumulation.

[0031] Furthermore, the motor control system provided in the present application can control the mesh belt motor of the transmission mesh belt by monitoring the zero-speed switch and the rotation-blocking switch, thereby avoiding serious sludge blockage and damage to the equipment. Figure 1 The principle block diagram of the motor control system provided in one embodiment of the present application, as shown in the figure, the motor control system includes a data acquisition module 111, a main control module 112 and a control output module 113, wherein the data acquisition module 111 and the control output module 113 are both connected to the main control module 112.

[0032] Among them, the data acquisition module 111 is used to collect the first feedback signal corresponding to the zero-speed switch 101 and the second feedback signal corresponding to the anti-rotation switch 102, and then the main control module 112 can determine the control signal according to the first feedback signal and the second feedback signal provided by the data acquisition module 111. Moreover, the control output module 113 is connected to the mesh belt motor 103, and the control output module 113 controls the mesh belt motor 103 according to the control signal. It can be understood that the main control module 112 obtains the first feedback signal corresponding to the zero-speed switch 101 and the second feedback signal corresponding to the anti-rotation switch 102 through the data acquisition module 111, so as to judge the sludge situation on the current transmission mesh belt through the first feedback signal and the second feedback signal, and then outputs the control signal when it is judged that a blockage occurs, so that the control output module 113 controls the mesh belt motor 103 to perform corresponding actions, such as deceleration, stopping operation, etc.

[0033] Optionally, in some embodiments, the motor control system further includes a storage module for storing data, recorded parameters, etc. generated during operation of the system through the storage module, so that the main control module can read or store corresponding data therefrom.

[0034] Therefore, the motor control system detects the feedback signals corresponding to the zero-speed switch and the resistance switch, and then accurately determines whether there is a blockage based on the corresponding feedback signals, thereby timely and accurately detecting mud blockage faults and performing corresponding control on the mesh belt motor, effectively improving the operating stability and reliability of the drying equipment.

[0035] In one embodiment, the data acquisition module may be a circuit module including an ADC (Analog to Digital Converter) sampling circuit, and the main control module is an MCU (Microcontroller Unit). As a module, the control output module may output a signal when there is a control signal, or provide a switch signal to make the controlled device move, such as a switch output circuit to provide a corresponding signal to the controlled device to control its movement.

[0036] Figure 2 This is a schematic diagram of the steps of a motor control method provided in an embodiment of the present application. The method is applied to the motor control system provided in the above embodiment, such as being executed by a main control module in the motor control system. The specific steps are as follows:

[0037] Step S210, respectively obtain a first feedback signal corresponding to the zero-speed switch and a second feedback signal corresponding to the anti-rotation switch.

[0038] The first feedback signal and the second feedback signal are used as the feedback signals of the zero-speed switch and the anti-rotation switch. The main control module can determine whether the speed of the transmission shaft of the mesh belt motor reaches the preset speed according to the first feedback signal, and can also determine whether there is material accumulation on the transmission mesh belt according to the second feedback signal. Exemplarily, the zero-speed switch is used to monitor the speed of the rotating shaft. When the speed of the rotating shaft is less than the preset speed, the first feedback signal is a low-level signal, and when the speed of the rotating shaft is greater than or equal to the preset speed, the first feedback signal is a high-level signal. That is, the preset speed is used as the threshold of the zero-speed switch to realize the judgment of the speed of the rotating shaft. The anti-rotation switch is used to judge whether the material is accumulated. When the material is transmitted normally and the blades of the anti-rotation switch rotate normally, the second feedback signal is a low-level signal; when the material accumulates and causes the blades of the anti-rotation switch to be blocked and rotate abnormally, the second feedback signal is a high-level signal.

[0039] Optionally, in one embodiment, the main control module acquires the first feedback signal and the second feedback signal through a data acquisition module. If the data acquisition module includes an ADC sampling circuit, the main control module can complete the acquisition of the first feedback signal and the second feedback signal through the ADC sampling circuit.

[0040] Step S220: Based on the first feedback signal and the second feedback signal, determine whether there is a congestion according to a preset logic judgment algorithm.

[0041] Regarding whether there is a blockage, the main control module performs logical operations on the first feedback signal and the second feedback signal obtained based on a preset logic judgment algorithm to determine whether there is a blockage at present. It can be understood that the main control module determines whether the rotating shaft speed is less than the preset speed based on the first feedback information, and determines whether there is material accumulation based on the second feedback information, and then determines whether there is a blockage by combining the above two judgment results.

[0042] Optionally, in one embodiment, the main control module uses AND logic to perform logical judgment on the first feedback signal and the second feedback signal, that is, to perform logical operation on the first feedback signal and the second feedback signal according to the preset AND logic, and then determine the calculation result after the logical operation, and determine whether there is a blockage based on the calculation result after the logical operation. For example, the value corresponding to the calculation result after the logical operation can be 0 or 1, where 0 indicates that there is no blockage and 1 indicates that there is a blockage. Therefore, during the AND logic operation, when the rotation speed of the rotating shaft is less than the preset speed and there is material accumulation, the main control module can determine that there is a blockage.

[0043] Step S230: If there is a blockage, determine to output an alarm signal to trigger a braking control operation on the mesh belt motor.

[0044] If there is a blockage, the main control module can output a corresponding alarm signal to inform the user of the current blockage. In addition, the main control module further controls the mesh belt motor through the control output module to perform a brake control operation on the mesh belt motor. Exemplarily, in some embodiments, when there is a blockage, the main control module responds to the alarm signal and provides a control signal to the control output module, so that the control output module operates the mesh belt motor to stop the motor from rotating, thereby stopping the sludge transportation.

[0045] It can be seen from the above scheme that through the coordinated judgment of the feedback signals corresponding to the zero-speed switch and the anti-rotation switch, this scheme can accurately determine whether there is a blockage, timely and accurately detect and handle mud blockage faults, and effectively reduce the occurrence of misjudgment and missed judgment, thereby effectively improving the operating stability, reliability and intelligence level of the drying equipment, and helping to improve the production efficiency of the drying equipment.

[0046] In one embodiment, the first feedback signal is a high level signal when the rotation speed of the transmission shaft is less than the preset rotation speed, and the second feedback signal is a high level signal when the rotation of the blade of the anti-rotation switch is blocked. It is conceivable that the first feedback signal is a low level signal when the rotation speed of the transmission shaft is greater than or equal to the preset rotation speed, and the second feedback signal is a low level signal when the blade of the anti-rotation switch rotates normally.

[0047] In this regard, when the main control module uses AND logic for logical operations, the high-level signal can be represented by 1 and the low-level signal can be represented by 0. Accordingly, the truth table of the logical operation is as follows:

[0048]

[0049] When the first feedback signal and the second feedback signal are both high-level signals, the calculation result is a high-level signal, and it is determined that there is a blockage; when either the first feedback signal or the second feedback signal is a low-level signal, the calculation result is a low-level signal, and it is determined that there is no blockage. It can be understood that in an application scenario, when the sludge feed rate suddenly increases and the material viscosity increases, it will cause material accumulation at the mesh belt conveyor handover position. At this time, the blades of the rotation resistance switch are hindered from rotating by the accumulated material. At the same time, the accumulation of a large amount of material also increases the load on the mesh belt, and the speed of the transmission shaft gradually decreases. In this regard, the first feedback signal and the second feedback signal are both high-level signals, so that the main control module can determine that there is currently a blockage.

[0050] Therefore, this solution combines the signals corresponding to the zero-speed switch and the rotation-blocking switch for comprehensive judgment. When the corresponding situations are all abnormal, the mesh belt motor is further controlled, thereby effectively avoiding misjudgment caused by external interference or momentary abnormality of a single switch, and improving the accuracy and reliability of fault judgment.

[0051] It is conceivable that, in some embodiments, the main control module may also use multiplication operation. Similarly, when the first feedback signal and the second feedback signal are both high-level signals, the corresponding calculation result is a high-level signal, thereby determining that a congestion exists.

[0052] In some embodiments, a pressure sensor is also provided on the conveyor mesh belt to detect the pressure value generated by the sludge on the conveyor mesh belt through the pressure sensor. The pressure sensor is also connected to the main control module to provide a third feedback signal to the main control module. The third feedback signal corresponding to the pressure sensor is a high-level signal when the pressure sensor detects a detection pressure value greater than or equal to a preset pressure value.

[0053] In this regard, when determining whether there is a blockage, the main control module can further determine whether there is a blockage in combination with the third feedback signal. For example, when the calculation result and the third feedback signal corresponding to the pressure sensor are both at a high level, it is determined that there is a blockage. Therefore, by determining whether there is excessive pressure, the main control module can more accurately determine whether there is a blockage at present, which helps to improve the accuracy and reliability of fault judgment.

[0054] For example, in one application scenario, when the mesh belt motor of the drying equipment is operating normally, the transmission shaft speed is maintained at 15 rpm. For example, the trigger speed threshold of the selected zero speed switch is 10 rpm. If during one operation, the transmission chain of the mesh belt motor is slightly loose, causing the mesh belt transmission shaft speed to drop to 8 rpm temporarily, the zero speed switch detects an abnormality, and the first feedback signal S zs =1. However, since the material distribution on the mesh belt is relatively uniform, there is no material accumulation that hinders the rotation of the blades on it. zx = 0. Then the judgment result is A = S zs ×S zx =1×0=0, the drying equipment will not trigger an alarm or shut down, avoiding unnecessary shutdowns caused by minor failures in the transmission chain. The equipment continues to operate normally, and the operation and maintenance personnel can check and tighten the transmission chain at the appropriate time.

[0055] If the sludge feed volume suddenly increases and the material viscosity increases during another operation, material accumulation occurs at the mesh belt conveyor junction. At this time, the blade of the rotation resistance switch is hindered from rotating by the accumulated material, and the corresponding second feedback signal S zx =1, and at the same time, a large amount of material accumulation also increases the load of the mesh belt, and the speed of the mesh belt drive shaft gradually decreases until it is lower than 10 rpm. The zero speed switch also detects an abnormality, and the corresponding first feedback signal S zs =1. Then the judgment result is A=S zs ×S zx =1×1=1, the control module immediately triggers the alarm signal, and controls the mesh belt motor to stop rotating through the control output module, causing the equipment to shut down, so that the staff can come to clean up the accumulated materials and check the equipment after receiving the alarm, preventing further damage to the equipment due to further deterioration of the mud blockage, and ensuring the safe and stable operation of the equipment and the normal progress of the sludge drying treatment.

[0056] Figure 3 This is a schematic diagram of the structure of a motor control device provided in an embodiment of the present application. The device is applied to the motor control system provided in the above embodiment. The device is used to execute the motor control method provided in the above embodiment and has the corresponding functional modules and beneficial effects of the execution method. As shown in the figure, the motor control device includes a signal acquisition module 301, a congestion judgment module 302 and an alarm control module 303.

[0057] Among them, the signal acquisition module 301 is configured to respectively obtain the first feedback signal corresponding to the zero-speed switch and the second feedback signal corresponding to the anti-rotation switch; the congestion judgment module 302 is configured to determine whether there is a congestion based on the first feedback signal and the second feedback signal according to a preset logic judgment algorithm; the alarm control module 303 is configured to determine to output an alarm signal if there is a congestion, so as to trigger the braking control operation of the belt motor.

[0058] Based on the above embodiment, the blocking determination module 302 is specifically configured as follows:

[0059] Performing a logic operation on the first feedback signal and the second feedback signal according to a preset AND logic;

[0060] Based on the calculation result after the logical operation, it is determined whether there is a congestion.

[0061] On the basis of the above embodiment, the first feedback signal is a high level signal when the rotation speed of the transmission shaft is less than the preset rotation speed, and the second feedback signal is a high level signal when the rotation of the blade of the anti-rotation switch is blocked. The blocking judgment module 302 is further configured as follows:

[0062] When the first feedback signal and the second feedback signal are both high-level signals, the calculation result is a high-level signal, and it is determined that a blockage exists;

[0063] When either the first feedback signal or the second feedback signal is a low level signal, the calculation result is a low level signal, and it is determined that there is no congestion.

[0064] Based on the above embodiment, the alarm control module 303 is specifically configured as follows:

[0065] In response to the alarm signal, a control signal is provided to the control output module so that the control output module controls the mesh belt motor to stop rotating.

[0066] On the basis of the above embodiment, when the transmission mesh belt is further provided with a pressure sensor, and the third feedback signal corresponding to the pressure sensor is a high level signal when the pressure sensor detects a detection pressure value greater than or equal to the preset pressure value, the blocking judgment module 302 is further configured as follows:

[0067] When the calculation result and the third feedback signal corresponding to the pressure sensor are both at high levels, it is determined that a blockage exists.

[0068] It is worth noting that in the embodiment of the above-mentioned device, the modules included are only divided according to functional logic, but are not limited to the above-mentioned division, as long as the corresponding functions can be achieved; in addition, the specific names of the modules are only for the convenience of distinguishing each other, and are not used to limit the protection scope of the embodiments of the present application.

[0069] Figure 4 The structural diagram of the drying device provided in one embodiment of the present application is used to execute the motor control method provided in the above embodiment, and has the functional modules and beneficial effects corresponding to the execution method. As shown in the figure, the drying device includes a processor 401, a memory 402, an input device 403 and an output device 404. The number of processors 401 can be one or more, and one processor 401 is taken as an example in the figure; the processor 401, the memory 402, the input device 403 and the output device 404 can be connected by a bus or other means, and the figure takes the connection through a bus as an example. The memory 402, as a computer-readable storage medium, can be used to store software programs, computer executable programs and modules, such as program instructions / modules corresponding to the motor control method in the embodiment of the present application. The processor 401 executes various corresponding functional applications and data processing by running the software programs, instructions and modules stored in the memory 402, that is, realizing the above-mentioned motor control method.

[0070] The memory 402 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system and at least one application required for a function; the data storage area may store data recorded or created during use, etc. In addition, the memory 402 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some embodiments, the memory 402 may further include a memory remotely arranged relative to the processor 401, and these remotely arranged memories may be connected to the device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0071] The input device 403 can be used to input corresponding digital or character information to the processor 401, and to generate key signal input related to the user settings and function control of the device; the output device 404 can be used to send or display key signal output related to the user settings and function control of the device.

[0072] An embodiment of the present application also provides a storage medium storing computer executable instructions, which, when executed by a processor, are used to perform relevant operations in the motor control method provided in any embodiment of the present application.

[0073] Computer-readable storage media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer-readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device.

[0074] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0075] Note that the above are only preferred embodiments of the present application and the technical principles used. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present application. Therefore, although the present application is described in more detail through the above embodiments, the present application is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A motor control system, characterized in that: Applied to drying equipment, the drying equipment includes a transmission mesh belt, and a zero-speed switch is provided on the transmission shaft of the mesh belt motor corresponding to the transmission mesh belt, and a rotation-resistance switch is provided at the starting end or the end end of the transmission mesh belt, and the motor control system includes: A data acquisition module, the data acquisition module is used to collect a first feedback signal corresponding to the zero-speed switch and a second feedback signal corresponding to the anti-rotation switch; A main control module, the main control module is connected to the data acquisition module, and the main control module is used to determine a control signal according to a first feedback signal and a second feedback signal provided by the data acquisition module; A control output module, wherein the control output module is connected to the main control module and the control output module is connected to the mesh belt motor, and the control output module is used to control the mesh belt motor according to the control signal.

2. A motor control method, characterized in that: Applied to the motor control system according to claim 1, the motor control method comprises: Respectively obtaining a first feedback signal corresponding to the zero-speed switch and a second feedback signal corresponding to the anti-rotation switch; Based on the first feedback signal and the second feedback signal, determining whether a blockage exists according to a preset logic judgment algorithm; If there is a blockage, an alarm signal is output to trigger a brake control operation on the mesh belt motor.

3. The motor control method according to claim 2, characterized in that: The determining whether there is a congestion situation based on the first feedback signal and the second feedback signal according to a preset logic judgment algorithm includes: performing a logic operation on the first feedback signal and the second feedback signal according to a preset AND logic; Based on the calculation result after the logical operation, it is determined whether there is a congestion.

4. The motor control method according to claim 3, characterized in that: The first feedback signal is a high-level signal when the rotation speed of the transmission shaft is less than a preset rotation speed, and the second feedback signal is a high-level signal when the rotation of the blade of the anti-rotation switch is blocked; The determining whether there is a congestion based on the calculation result after the logic operation includes: When the first feedback signal and the second feedback signal are both high-level signals, the calculation result is a high-level signal, and it is determined that a congestion exists; When either the first feedback signal or the second feedback signal is a low level signal, the calculation result is a low level signal, and it is determined that there is no congestion.

5. The motor control method according to claim 2 or 4, characterized in that: If there is a blockage, determining to output an alarm signal to trigger a braking control operation on the mesh belt motor includes: In response to the alarm signal, a control signal is provided to a control output module so that the control output module controls the mesh belt motor to stop rotating.

6. The motor control method according to claim 3, characterized in that: In the case where the transmission mesh belt is further provided with a pressure sensor, and the third feedback signal corresponding to the pressure sensor is a high level signal when the pressure sensor detects a detection pressure value greater than or equal to a preset pressure value, the calculation result based on the logical operation is used to determine whether there is a blockage, including: When the calculation result and the third feedback signal corresponding to the pressure sensor are both at a high level, it is determined that a blockage exists.

7. A motor control device, characterized in that: Applicable to the motor control system according to claim 1, the motor control device comprises: A signal acquisition module, configured to respectively acquire a first feedback signal corresponding to the zero-speed switch and a second feedback signal corresponding to the anti-rotation switch; a congestion determination module, configured to determine whether a congestion exists according to a preset logic determination algorithm based on the first feedback signal and the second feedback signal; The alarm control module is configured to determine to output an alarm signal if a blockage occurs, so as to trigger a braking control operation on the mesh belt motor.

8. A drying device, characterized in that: The drying device includes a transmission mesh belt, and a zero-speed switch is provided on the transmission shaft of the mesh belt motor corresponding to the transmission mesh belt, and a rotation-blocking switch is provided at the starting end or the end end of the transmission mesh belt. The drying device also includes: one or more processors; A storage device for storing one or more programs, when the one or more programs are executed by the one or more processors, the one or more processors implement the motor control method as described in any one of claims 2-6.

9. The drying device according to claim 8, characterized in that: The zero-speed switch is a detection element including a photoelectric encoder, and the blades of the rotation-resistance switch are provided with an anti-stick coating.

10. A storage medium storing computer executable instructions, characterized in that: When the computer executable instructions are executed by a processor, they are used to perform the motor control method according to any one of claims 2 to 6.

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