Conveying equipment, control method and security inspection machine

Abstract

The invention discloses conveying equipment, a control method and a security inspection machine. The conveying equipment comprises a conveying belt, a first driving part, a first transmission part, a second driving part, a second transmission part and a control device. The conveyor belt sleeves the first transmission part and the second transmission part; the first transmission part is connected with the first driving part and can be driven to rotate; the second transmission part is connected with the second driving part and can be driven to rotate; the control device is configured to be used for generating a control instruction so as to control the first driving part and the second driving part to switch the operation state. The second driving part is additionally arranged on the second transmission part, and the operation states of the first driving part and the second driving part are switched through the control device, so that the first driving part and the second driving part can be prevented from working out of a rated frequency range under the condition of large-amplitude frequency adjustment or large speed change; and meanwhile, a first transmission piece and a second transmission piece which are wide in adaptability do not need to be customized, and it is guaranteed that the equipment can have the long service life.

Description

Technical Field

[0001] The present application relates to the technical field of security inspection machines, and in particular to a transmission device, a control method and a security inspection machine. Background Art

[0002] Security inspection machines in related technologies usually use a motorized roller at one end of the conveying channel and an unpowered roller at the other end. When the motor rotates, the motorized roller pulls the belt, and the belt drives the driven powered roller to rotate.

[0003] Furthermore, the motorized rollers commonly used in security inspection machines are typically customized based on the machine model and speed requirements. This means the motor's rotational speed is fixed at rated power and frequency. Changing the motor speed typically requires adjusting the frequency accordingly. Large speed fluctuations can affect the motor's lifespan and damage the motorized roller. Consequently, conventional security inspection machines struggle to maintain a long service life while maintaining a wide speed adjustment range. Summary of the Invention

[0004] The present application proposes a transmission device for effectively solving the technical problem in related technologies that it is difficult to take into account both service life and a wide speed regulation range at the same time.

[0005] The present application also proposes a control method for the above-mentioned transmission equipment.

[0006] The present application also proposes a security inspection machine including the above-mentioned conveying device.

[0007] A first embodiment of the present application provides a conveying device, comprising: a conveyor belt, a first driving member, a first transmission member, a second driving member, a second transmission member, and a control device;

[0008] The conveyor belt is sleeved outside the first transmission member and the second transmission member;

[0009] The first transmission member is connected to the first driving member and can be driven to rotate;

[0010] The second transmission member is connected to the second driving member and can be driven to rotate;

[0011] The control device is configured to generate a control instruction to control the first driving member and the second driving member to switch operating states.

[0012] Furthermore, controlling the first driving member and the second driving member to switch operating states includes:

[0013] Controlling the first driving member to operate at a first preset speed and stopping the second driving member so that the first transmission member acts as an active member to drive the conveyor belt to operate, and the second transmission member acts as a driven member to rotate driven by the conveyor belt;

[0014] Alternatively, the second driving member is controlled to move at a second preset speed, and the first driving member is shut down, so that the second transmission member acts as an active member to drive the conveyor belt to operate, and the first transmission member acts as a driven member to rotate driven by the conveyor belt.

[0015] Furthermore, the control device includes a relay, and the relay is configured to control the first driving member to start and the second driving member to stop, or the second driving member to start and the first driving member to stop, by switching the circuit.

[0016] Furthermore, the conveying device further comprises an energy dissipation device, wherein the energy dissipation device is connected to the first driving member and the second driving member respectively;

[0017] The energy dissipation device is configured to receive the reverse electromotive force generated by the first driving member when the relay switching circuit turns off the first driving member;

[0018] Alternatively, the energy dissipation device is configured to receive the reverse electromotive force generated by the second driving member when the relay switching circuit turns off the second driving member.

[0019] Furthermore, the control device further includes a first frequency converter and a second frequency converter;

[0020] The first frequency converter is configured to make the first preset rotational speed of the first driving member fall within a first preset speed range;

[0021] The second frequency converter is configured to enable the second preset rotational speed of the second driving member to be within a second preset speed range.

[0022] Furthermore, the control device is also configured to generate the control instruction in response to the operating status parameters of the conveyor belt.

[0023] Furthermore, the operation status parameter includes at least one of an operation time period, a load, an operation duration or an operation mode.

[0024] It can be seen from the above technical solutions that the embodiments of the present application have at least the following beneficial effects: by adding a second drive member to the second transmission member and switching the operating states of the first drive member and the second drive member through a control device, the first drive member and the second drive member can be prevented from operating outside the rated frequency range when a large frequency adjustment is performed or when the speed changes greatly. At the same time, there is no need to customize the first transmission member and the second transmission member with wider adaptability, thereby ensuring that the equipment has a longer service life.

[0025] A second aspect of the present application provides a control method for a conveying device, the conveying device comprising a conveyor belt, a first driving member, a first transmission member, a second driving member, a second transmission member, and a control device, wherein the conveyor belt is sleeved over the first transmission member and the second transmission member, the first transmission member is connected to the first driving member and can be driven to rotate, and the second transmission member is connected to the second driving member and can be driven to rotate;

[0026] The control method includes:

[0027] Obtaining operating status parameters of the conveyor belt;

[0028] A corresponding control instruction is determined according to the operating state parameter, and the first driving member and the second driving member are respectively configured to respond to the control instruction and switch to the corresponding operating state respectively.

[0029] The third embodiment of the present application provides a security inspection machine, including: a conveying device as in the first embodiment of the present application.

[0030] The storage medium of the fourth embodiment of the present application stores a computer program thereon, and is characterized in that when the computer program is executed by a processor, it implements the control method of the second embodiment of the present application.

[0031] It is not difficult to understand that the control method of the conveying equipment in the second aspect embodiment of the present application, the security inspection machine in the third aspect embodiment of the present application, and the storage medium in the fourth aspect embodiment of the present application all have the technical effects of the conveying equipment in the first aspect embodiment, and therefore will not be repeated.

[0032] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0034] Figure 1 A schematic diagram of the structure of a transmission device provided in one embodiment of the present application;

[0035] Figure 2 An operational flow chart of a method for controlling a conveying device provided in one embodiment of the present application;

[0036] Figure 3 A system block diagram of a transmission device provided in one embodiment of the present application;

[0037] Figure 4 A circuit design diagram of a transmission device provided in one embodiment of the present application;

[0038] Figure 5 A schematic diagram of the structure of an electronic device provided in one embodiment of the present application.

[0039] Reference numerals:

[0040] 101, conveyor belt; 102, first transmission member; 103, second transmission member;

[0041] 201. Processor; 202. Memory. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0043] It's understandable that security inspection machines typically use a motorized roller at one end of the conveyor channel and an unpowered roller at the other, with the motorized roller's transmission speed set via a frequency converter. In some embodiments, large speed fluctuations, such as switching from 0.8 m / s to 0.2 m / s, can shorten the motor's service life. Furthermore, when switching from 0.2 m / s to 0.8 m / s, the motorized roller can be easily damaged by excessive use.

[0044] Furthermore, the motorized rollers commonly used in security inspection machines are typically customized based on the machine model and speed requirements for the application. This means the motor's rotational speed is fixed at rated power and frequency. In some embodiments, the motor's speed is 0.38 m / s when powered by 220V three-phase power at 50 Hz. When faster speeds are required, the frequency is increased to greater than 50 Hz. This causes the motor to operate beyond its rated rating, potentially damaging it. When lower speeds are required, the frequency is decreased to less than 50 Hz, which reduces the motor's rating. However, since the motor's parameters are fixed, operating outside the rated range due to derating can shorten its lifespan.

[0045] Based on this, a conveying device and a security inspection machine in an embodiment of the present application can greatly extend the service life of the electric roller and the motor. The design and use of the dual electric rollers also ensure that the security inspection machine will not completely stop working even if the electric roller at one end fails, while also extending the service life of the entire security inspection machine.

[0046] See also Figures 1 to 5 As shown, an embodiment of the first aspect of the present application discloses a conveying device, including a conveyor belt 101, a first driving member, a first transmission member 102, a second driving member, a second transmission member 103 and a control device.

[0047] The conveyor belt 101 is mounted outside the first transmission member 102 and the second transmission member 103; the first transmission member 102 is connected to the first driving member and can be driven to rotate; the second transmission member 103 is connected to the second driving member and can be driven to rotate; the control device is configured to generate control instructions to control the first driving member and the second driving member to switch operating states.

[0048] In an embodiment of the present application, a second drive member is added to the second transmission member 103, and the operating status of the first drive member and the second drive member is switched through a control device, so that when a large frequency adjustment is performed or the speed changes greatly, the first drive member and the second drive member can be prevented from operating outside the rated frequency range. At the same time, there is no need to customize the first transmission member 102 and the second transmission member 103 with wider adaptability, thereby ensuring that the equipment has a longer service life.

[0049] It can be understood that controlling the first drive member and the second drive member to switch operating states can be understood as allowing two independent drive components (first drive member, second drive member) to switch between different working states through specific control logic or operations to meet the overall operating requirements of the equipment.

[0050] It should be understood that in some embodiments, "switching operating states" involves adjusting the speed, direction, or start / stop status of two drive components through control logic to achieve functional adjustments. Correspondingly, controlling the state changes of the two drive components enables operating condition adaptation, functional switching, or fault redundancy.

[0051] Exemplarily, in some embodiments, the operating states of the drive components generally include: start / stop (from stationary to running, or from running to stationary); high speed / low speed (adjusting the running speed); loading / unloading (outputting power or cutting off power); standby / working (switching between standby state and active working state).

[0052] Furthermore, switching operating states refers to the states of two drive units changing in coordination according to certain rules. Common scenarios include but are not limited to: (1) Alternating operation: for example, when the first drive unit is running, the second drive unit stops; when switching is required, the first drive unit stops and the second drive unit starts. (2) Coordinated speed regulation: when the first drive unit is running at high speed, the second drive unit assists at low speed; according to the working conditions, the first drive unit switches to low speed and the second drive unit switches to high speed. (3) Backup switching: under normal circumstances, the first drive unit is working and the second drive unit is on standby; when the first drive unit fails, it automatically switches to the second drive unit for operation.

[0053] In some embodiments, the first and second driving members may be configured to include, but are not limited to, commonly used components capable of providing driving force, such as motors, pneumatic cylinders, or hydraulic cylinders. The first transmission member 102 and the second transmission member 103 may be configured to include, but are not limited to, commonly used components with transmission functions, such as transmission rollers, sprockets, and gears. The conveyor belt 101 may be a belt conveyor, a chain conveyor, or a plate conveyor, and may be selected based on actual conditions. For example, the first and second driving members are motors, the first and second transmission members 102 and 103 are rollers, and the conveyor belt 101 is a belt, which is more suitable for the application scenario of security inspection machines.

[0054] The following will be combined Figures 1 to 5 The transmission equipment disclosed in the embodiments of the present application is specifically explained and illustrated.

[0055] For example, in some embodiments, controlling the first driving member and the second driving member to switch operating states includes:

[0056] The first driving member is controlled to operate at a first preset speed, and the second driving member is turned off, so that the first transmission member 102 acts as an active member to drive the conveyor belt 101 to operate, and the second transmission member 103 acts as a driven member to rotate driven by the conveyor belt 101;

[0057] Alternatively, the second driving member is controlled to move at a second preset speed, and the first driving member is shut down, so that the second transmission member 103 acts as an active member to drive the conveyor belt 101 to operate, and the first transmission member 102 acts as a driven member to rotate driven by the conveyor belt 101.

[0058] It can be understood that in this application, by selecting the first drive member and the second drive member with different rated power and frequency, such as defining the first drive member as a high-speed motor and the second drive member as a low-speed motor, the control device is used to control the first drive member and the second drive member to switch the operating state according to different working conditions. When the conveyor belt 101 needs to run at high speed, the first drive member is controlled to move at the first preset speed and the second drive member is shut down. When the conveyor belt 101 needs to run at high speed, the second drive member is controlled to move at the second preset speed and the first drive member is shut down, thereby avoiding the first drive member and the second drive member from working outside the rated frequency range. On the basis of meeting the function of a wide speed regulation range, the service life of the conveying equipment is extended.

[0059] In other embodiments, the method of controlling the first driving member and the second driving member to switch the operating state so that the first transmission member 102 acts as an active member to drive the conveyor belt 101 to operate also includes: on the basis of the normal operation of the first driving member, the second driving member is made to idle through the design of the connecting member, which can also achieve the above-mentioned effect of making the first transmission member 102 act as an active member to drive the conveyor belt 101 to operate, and the second transmission member 103 acts as a driven member to be driven by the conveyor belt 101 to rotate, and vice versa, which will not be further elaborated here.

[0060] It should be understood that in order to make the control device control the first drive member and the second drive member to switch the operating state more convenient and to make the control more reliable, in some embodiments of the present application, the control device includes a relay, and the relay is configured to control the first drive member to start and the second drive member to stop, or the second drive member to start and the first drive member to stop through a switching circuit.

[0061] It can be understood that the high and low speed motors are switched by switching the control circuit. When high speed is to be used, the first drive member drives the first transmission member 102 to pull the conveyor belt 101 to drive the second transmission member 103 and the second drive member. When low speed is used, the second drive member drives the second transmission member 103 to pull the conveyor belt 101 to drive the first transmission member 102 and the first drive member. The first drive member and the second drive member are controlled by the same drive source and switched by relays to realize automatic switching, protection or regulation of the circuit.

[0062] In other embodiments, two motors can also be controlled separately by two inverters, that is, one inverter is controlled to output and the other is not output. The above effect can be achieved by selecting one of them to work, but it is necessary to ensure that the control of the two inverters is appropriate.

[0063] Since reverse electromotive force is inevitably generated when the first and second driving members switch operating states, in order to solve the above technical problems, in some embodiments of the present application, the transmission device further includes an energy dissipation device, which is connected to the first and second driving members respectively;

[0064] The energy dissipation device is configured to receive the reverse electromotive force generated by the first driving member when the relay switching circuit shuts down the first driving member;

[0065] Alternatively, the energy dissipation device is configured to receive the reverse electromotive force generated by the second driving member when the relay switching circuit turns off the second driving member.

[0066] It can be understood that, on the basis of the unchanged output frequency setting of the inverter, the circuit controls which motor rotates by switching low-speed and high-speed signals. The other motor will be driven by the other motor, and at the moment of switching, the internal coil of the motor will generate a reverse electromotive force. In this regard, by connecting a module for reverse electromotive force discharge and / or energy storage, that is, the energy discharge device provided in the embodiment of the present application, the above-mentioned technical problems can be solved, and the service life of the equipment can be further extended on the basis of making full use of energy.

[0067] For example, in some embodiments, specific reference is made to Figure 4 Since the winding coil inside the motor is equivalent to the inductance in the circuit, sudden stop will cause reverse electromotive force. At this time, the reverse electromotive force needs to be discharged. By switching the relay, the three phases of the electric drum are connected to the energy discharge device to store reverse electromotive force.

[0068] In some embodiments, the energy dissipation device includes but is not limited to at least one of a power storage module, a power consumption module or a backflow prevention module, and on this basis, a drive control unit, a voltage stabilizing unit, a bridge drive unit and a switch unit can be selectively set according to actual usage needs, so as to store and absorb the reverse electromotive force when the motor generates reverse electromotive force, thereby achieving the purpose of recovering electric energy and reducing the total energy loss of the product.

[0069] In some embodiments of the present application, the control device further includes a first frequency converter and a second frequency converter;

[0070] The first frequency converter is configured to make the first preset rotational speed of the first driving member fall within a first preset speed range;

[0071] The second frequency converter is configured to make the second preset rotation speed of the second driving member fall within a second preset speed range.

[0072] It's understandable that the motor's drive source is a frequency converter, whose parameters can be adjusted through external control. The frequency converter changes the motor's speed by setting the frequency. This ensures that the motor's rated speed is not exceeded, which would shorten its lifespan, given the frequency-speed relationship.

[0073] In some embodiments, the postal and logistics security industries use 0.4m / s as the boundary to define high speed and low speed. Here we generally consider that the speed difference is large, for example, the first frequency converter and the second frequency converter are configured in the cases of 0.8m / s and 0.2m / s respectively. For example, it can be understood in terms of frequency conversion speed regulation of the frequency converter. Generally, the factory rated speed of the motor refers to the speed at 50Hz. For example, for a 0.2m / s motor, 50Hz is 0.2m / s, 25Hz is 0.1m / s, 100Hz is 0.4m / s, 200Hz is 0.8m / s, and so on. Based on the configuration mode of the control device of the embodiment of the present application to control the switching operation state of the first drive member and the second drive member, the speed difference is avoided, so as to avoid the situation where the frequency converter frequency changes greatly and directly affects the life of the motor due to the large speed difference.

[0074] In some embodiments of the present application, the control device is further configured to generate a control instruction in response to an operating state parameter of the conveyor belt 101. It can be understood that through the above configuration, the conveying device of the present application embodiment can control the first drive member and the second drive member according to the specific actual application scenario, thereby improving the degree of automation.

[0075] Exemplarily, the operating status parameters include at least one of the operating time period, load, operating duration, or operating mode. It is understandable that in a logistics sorting center, when there are few packages, only low-speed operation is required, and when there are many packages, high-speed operation is required. Or high-speed sorting is performed within a certain time period, and low-speed operation is performed within a certain time period. In some embodiments, switching can also be performed based on working hours, or based on the staff's control of the security inspection machine, or based on the amount of goods on the sorting line. Of course, when the security inspection machine is started, it should be started from low speed to high speed to avoid excessive acceleration, and it should also be stopped from high speed to low speed and then stopped.

[0076] The following describes in detail the transmission device of the embodiment of the present application using a specific embodiment. It should be noted that the following embodiment is only an exemplary description and should not be understood as limiting the embodiment of the present application.

[0077] See also Figures 1 to 5 As shown, the transmission device of this embodiment, specifically refer to Figure 1A high-speed motor drives a first transmission element 102 at one end of the conveyor belt 101, and a low-speed motor drives a second transmission element 103 at the other end of the conveyor belt 101. When high speed is required, the high-speed motor pulls the belt to drive the low-speed motor. When low speed is required, the low-speed motor pulls the belt to drive the high-speed motor. The motors are controlled by the same drive source and switched by relays.

[0078] Based on this configuration, the conveying equipment of this embodiment does not require custom-made motorized rollers with wide adaptability, and its functionality can be easily implemented on commercially available motorized rollers. The inverter parameters only need to be set during machine installation, eliminating the need for repeated configuration during operation. Relative speed regulation only requires controlling the relay. Furthermore, even if one motorized roller of this embodiment fails, the remaining motorized roller remains operational, ensuring the security inspection system remains operational for extended periods of time.

[0079] See also Figures 1 to 5 As shown, an embodiment of the second aspect of the present application discloses a control method for a conveying device, wherein the conveying device includes a conveyor belt 101, a first driving member, a first transmission member 102, a second driving member, a second transmission member 103, and a control device. The conveyor belt 101 is sleeved outside the first transmission member 102 and the second transmission member 103. The first transmission member 102 is connected to the first driving member and can be driven to rotate. The second transmission member 103 is connected to the second driving member and can be driven to rotate.

[0080] Specific reference Figure 2 and Figure 3 , control methods include:

[0081] Obtaining the operating status parameters of the conveyor belt 101;

[0082] A corresponding control instruction is determined according to the operating state parameter, and the first driving member and the second driving member are respectively configured to respond to the control instruction and switch to the corresponding operating state respectively.

[0083] For example, referring to Figure 2 The control circuit is used to configure the frequency converter and control the start and stop, so that the first and second drive elements are configured as high-speed motors and low-speed motors, respectively. Based on the settings of the high-speed and low-speed switching circuits and controlled by the corresponding control circuits, the first and second drive elements are configured to respond to control instructions and switch to corresponding operating states, respectively, to achieve the effect of controlling the speed of conveyor belt 101. Furthermore, the reverse electromotive force generated after switching to the corresponding operating state is processed by the reverse electromotive force discharge and energy storage module.

[0084] For example, referring to Figure 3, the conveying equipment of the embodiment of the present application can initialize the inverter parameters and the initialization relay status before use, so as to determine the specific operating speeds of low-speed operation and high-speed operation, and ensure that the equipment starts to operate in a low-speed state. Among them, obtaining the operating status parameters of the conveyor belt 101 is the detection condition step in the flow chart, and the detection conditions need to be formulated according to the actual situation of the scene. For example, it can be switched according to the working hours, or according to the staff's control of the security inspection machine, or according to the amount of goods on the sorting line. Of course, when the security inspection machine is started, it should be started from low speed to high speed to avoid excessive acceleration, and it should also be stopped from high speed to low speed and then stopped.

[0085] It can be understood that the contents of the above method embodiments are all applicable to the present device embodiments, the functions specifically implemented by the present device embodiments are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0086] The security inspection machine of the third embodiment of the present application includes: the conveying equipment of the first embodiment of the present application.

[0087] The storage medium of the fourth aspect embodiment of the present application stores a computer program thereon, and when the computer program is executed by a processor, it implements the control method of the transmission device of the second aspect embodiment of the present application.

[0088] Reference Figure 5 , an embodiment of the present application further provides an electronic device, including:

[0089] at least one processor 201;

[0090] At least one memory 202, configured to store at least one program;

[0091] When the at least one program is executed by the at least one processor 201 , the at least one processor 201 implements the above method embodiment.

[0092] Similarly, it can be understood that the contents of the above method embodiments are applicable to the present device embodiments, the functions specifically implemented by the present device embodiments are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0093] Similarly, the contents of the above method embodiments are applicable to the computer-readable storage medium embodiments. The functions specifically implemented by the computer-readable storage medium embodiments are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0094] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0095] The terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "multiple" means two or more. It should be noted that the term "and / or" used in this article is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. Similarly, at least one of A or B can also mean: A exists alone, A and B exist at the same time, and B exists alone.

[0096] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0097] In the above description of this specification, reference to the terms "one embodiment / example," "another embodiment / example," or "certain embodiments / examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present application. In the description of this specification, the specific features, structures, materials, or characteristics may be combined in any appropriate manner in any one or more embodiments or examples.

[0098] In some optional embodiments, the functions / operations mentioned in the block diagram may not occur in the order mentioned in the operation diagram. For example, depending on the functions / operations involved, the two boxes shown in succession may actually be executed substantially simultaneously or the boxes can sometimes be executed in reverse order. In addition, the embodiments presented and described in the flow chart of the present application are provided in an exemplary manner for the purpose of providing a more comprehensive understanding of the technology. The disclosed method is not limited to the operations and logic flows presented herein. Optional embodiments are contemplated in which the order of the various operations is changed and the sub-operations described as a part of a larger operation are performed independently.

[0099] In addition, although the present application is described in the context of functional modules, it should be understood that, unless otherwise stated, one or more of the functions and / or features may be integrated into a single physical device and / or software module, or one or more functions and / or features may be implemented in separate physical devices or software modules. It is also understood that a detailed discussion of the actual implementation of each module is not necessary for understanding the present application. More specifically, given the properties, functions, and internal relationships of the various functional modules in the devices disclosed herein, the actual implementation of the module will be understood within the routine skills of an engineer. Therefore, a person skilled in the art can implement the present application as set forth in the claims using ordinary techniques without undue experimentation. It is also understood that the specific concepts disclosed are merely illustrative and are not intended to limit the scope of the present application, which is determined by the full scope of the appended claims and their equivalents.

[0100] If the function is implemented in the form of 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 application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0101] The logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing the logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (e.g., a computer-based system, a system including a processor, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device). For purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by, or in conjunction with, an instruction execution system, apparatus, or device.

[0102] More specific examples (a non-exhaustive list) of computer-readable media include the following: an electrical connection with one or more wires (electronic devices), a portable computer disk cartridge (magnetic devices), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disc read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering, or processing in another suitable manner as necessary, and then stored in a computer memory.

[0103] It should be understood that various parts of the present application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used to implement: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

Claims

1. A conveying device, characterized in that: include: A conveyor belt, a first driving member, a first transmission member, a second driving member, a second transmission member, and a control device; The conveyor belt is sleeved outside the first transmission member and the second transmission member; The first transmission member is connected to the first driving member and can be driven to rotate; The second transmission member is connected to the second driving member and can be driven to rotate; The control device is configured to generate a control instruction to control the first driving member and the second driving member to switch operating states.

2. The conveying device according to claim 1, characterized in that: The controlling the first driving member and the second driving member to switch operating states includes: Controlling the first driving member to operate at a first preset speed and stopping the second driving member so that the first transmission member acts as an active member to drive the conveyor belt to operate, and the second transmission member acts as a driven member to rotate driven by the conveyor belt; Alternatively, the second driving member is controlled to move at a second preset speed, and the first driving member is shut down, so that the second transmission member acts as an active member to drive the conveyor belt to operate, and the first transmission member acts as a driven member to rotate driven by the conveyor belt.

3. The conveying device according to claim 2, characterized in that: The control device includes a relay configured to control the first driving member to start and the second driving member to stop, or the second driving member to start and the first driving member to stop, by switching a circuit.

4. The conveying device according to claim 3, characterized in that: The conveying device further includes an energy dissipation device, wherein the energy dissipation device is connected to the first driving member and the second driving member respectively; The energy dissipation device is configured to receive the reverse electromotive force generated by the first driving member when the relay switching circuit turns off the first driving member; Alternatively, the energy dissipation device is configured to receive the reverse electromotive force generated by the second driving member when the relay switching circuit turns off the second driving member.

5. The conveying device according to claim 2, characterized in that: The control device further includes a first frequency converter and a second frequency converter; The first frequency converter is configured to make the first preset rotational speed of the first driving member fall within a first preset speed range; The second frequency converter is configured to enable the second preset rotational speed of the second driving member to be within a second preset speed range.

6. The conveying device according to claim 1, characterized in that: The control device is further configured to generate the control instruction in response to an operating state parameter of the conveyor belt.

7. The conveying device according to claim 6, characterized in that: The operation status parameter includes at least one of an operation time period, a load, an operation duration or an operation mode.

8. A method for controlling a conveying device, characterized in that: The conveying device includes a conveyor belt, a first driving member, a first transmission member, a second driving member, a second transmission member and a control device, wherein the conveyor belt is sleeved outside the first transmission member and the second transmission member, the first transmission member is connected to the first driving member and can be driven to rotate, and the second transmission member is connected to the second driving member and can be driven to rotate; The control method includes: Obtaining operating status parameters of the conveyor belt; A corresponding control instruction is determined according to the operating state parameter, and the first driving member and the second driving member are respectively configured to respond to the control instruction and switch to the corresponding operating state respectively.

9. A security inspection machine, characterized in that: include: The conveying device according to any one of claims 1 to 7.

10. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the control method according to claim 8 is implemented.

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