5g wireless communication loop of grab crane PLC control system, and method

Abstract

The present application relates to a 5G wireless communication loop of a grab crane PLC control system, and a method. The 5G wireless communication loop comprises: a first DP communication protocol coupler, a first 5G wireless network access device, a second 5G wireless network access device, a second DP communication protocol coupler, a third 5G wireless network access device, and a third DP communication protocol coupler; the first DP communication protocol coupler, the first 5G wireless network access device, the second 5G wireless network access device and the second DP communication protocol coupler constitute a grab crane gantry remote control 5G wireless network, and the first DP communication protocol coupler, the first 5G wireless network access device, the third 5G wireless network access device and the third DP communication protocol coupler constitute a grab crane trolley remote control 5G wireless network. The present application can realize communication between a control instruction and a detection signal.

Description

A 5G wireless communication circuit and method for a grab crane PLC control system Technical Field

[0001] This application relates to the technical field of PLC control for grab cranes, and in particular to a 5G wireless communication circuit and method for a PLC control system of a grab crane. Background Technology

[0002] Grab cranes are essential tools and equipment for mechanizing and automating production processes in modern industrial production and lifting transportation, and are widely used in industries such as steel, petroleum, chemical, and power. A grab crane system consists of a trolley, a crane carriage, a lifting device, a trolley / crane drag line device, and a control system. The trolley / crane drag line device mainly consists of drag line rails, drag lines, drag cables, and drag optical cables. The drag cables primarily provide power to the crane system.

[0003] The grab crane control system mainly uses PLC control, which is implemented through an optical fiber loop. The optical fiber loop mainly consists of an optical transceiver and a tow cable, providing a communication link not only for the grab crane control system but also for other equipment systems within the grab crane system.

[0004] The optical fiber cable and cable are fixed to the optical fiber cable trolley, which is attached to the trolley track. When the grab crane is operating, the crane pulls the trolley along the track, and the trolley pulls the optical fiber cable and cable synchronously. However, during operation, the trolley / gantry communication optical fiber cable rubs against other cables, causing its outer sheath to wear out and the cable to become damaged. This leads to communication interruption between the PLC system's central processing unit and the remote I / O station, resulting in a communication failure in the crane's control system, causing the grab crane to stop operating, affecting equipment safety and factory production efficiency, and in severe cases, causing factory shutdown. Furthermore, during operation, collisions between the trolley / gantry communication optical fiber cable and other cables and mechanical equipment can cause the fiber core to break, preventing the optical fiber cable from transmitting optical signals to the control system. This also interrupts communication between the PLC system's central processing unit and the remote I / O station, leading to a communication failure in the crane's control system and the grab crane stopping operating.

[0005] When the fiber optic cable of the large or small trolley is damaged, it must be replaced. The cable is long, and the replacement is costly and labor-intensive. The grab crane is installed in an environment with high dust and toxic gases, and the long-term replacement of the fiber optic cable may be harmful to human health. At the same time, the fiber optic cable is installed at a high position, and the replacement is a high-altitude operation. The maintenance space of the grab crane is small, making the construction difficult and posing significant safety hazards. Summary of the Invention

[0006] To address the problems in existing technologies, this application proposes a 5G wireless communication loop and method for a grab crane PLC control system. A low-latency, high-bandwidth 5G wireless network communication loop is deployed between the grab crane PLC system and the remote control station to establish communication connections between the grab crane PLC system and the trolley and crane, thereby improving the operational stability and reliability of the PLC communication system.

[0007] Specifically, this application provides a 5G wireless communication circuit for a grab crane PLC control system, wherein the grab crane includes a trolley and a crane, and includes:

[0008] The first DP communication protocol coupler is used to receive the first control instruction and the second control instruction issued by the CPU of the PLC control system, and convert the first control instruction into a first industrial Ethernet protocol signal and the second control instruction into a second industrial Ethernet protocol signal.

[0009] The first 5G wireless network access device is connected to the first DP communication protocol coupler and is used to receive the first industrial Ethernet protocol signal and the second industrial Ethernet protocol signal and send the first industrial Ethernet protocol signal and the second industrial Ethernet protocol signal out in the form of 5G signals.

[0010] The second 5G wireless network access device is installed on the vehicle and connected to the first 5G wireless network access device, and is used to receive the first industrial Ethernet protocol signal sent by the first 5G wireless network access device.

[0011] The second DP communication protocol coupler is installed on the trolley and connected to the second 5G wireless network access device. It is used to receive the first industrial Ethernet protocol signal and convert it into the first control command to control the trolley.

[0012] A third 5G wireless network access device, mounted on the vehicle and connected to the first 5G wireless network access device, is used to receive the second industrial Ethernet protocol signal sent by the first 5G wireless network access device; and

[0013] A third DP communication protocol coupler is installed on the vehicle and connected to the third 5G wireless network access device. It is used to receive the second industrial Ethernet protocol signal and convert it into the second control command to control the vehicle.

[0014] The second DP communication protocol coupler is further configured to receive the first monitoring signal from the trolley and convert the first monitoring signal into a third industrial Ethernet protocol signal; the second 5G wireless network access device is further configured to receive the third industrial Ethernet protocol signal and transmit the third industrial Ethernet protocol signal as a 5G signal; the first 5G wireless network access device is further configured to receive the third industrial Ethernet protocol signal and upload it to the first DP communication protocol coupler; the first DP communication protocol coupler is further configured to convert the third industrial Ethernet protocol signal into the first monitoring signal and upload it to the CPU of the PLC control system;

[0015] The third DP communication protocol coupler is also used to receive the second monitoring signal of the vehicle and convert the second monitoring signal into a fourth industrial Ethernet protocol signal; the third 5G wireless network access device is also used to receive the fourth industrial Ethernet protocol signal and transmit the fourth industrial Ethernet protocol signal in the form of a 5G signal; the first 5G wireless network access device is also used to receive the fourth industrial Ethernet protocol signal and upload it to the first DP communication protocol coupler; the first DP communication protocol coupler is also used to convert the fourth industrial Ethernet protocol signal into the second monitoring signal and upload it to the CPU of the PLC control system.

[0016] As a preferred embodiment, the first 5G wireless network access device and the first DP communication protocol coupler are installed on the wall of the operating workshop of the grab crane.

[0017] As a preferred embodiment, the first 5G wireless network access device is connected to the first DP communication protocol coupler via an RJ45 network cable.

[0018] The second 5G wireless network access device is connected to the second DP communication protocol coupler via an RJ45 network cable;

[0019] The third 5G wireless network access device is connected to the third DP communication protocol coupler via an RJ45 network cable.

[0020] As a preferred embodiment, the second 5G wireless network access device and the second DP communication protocol coupler are installed in the remote PLC-IO station of the trolley;

[0021] The third 5G wireless network access device and the third DP communication protocol coupler are installed in the remote PLC-IO station of the vehicle.

[0022] As a preferred embodiment, the first 5G wireless network access device and the second 5G wireless network access device are connected via a 5GHz frequency band wireless network.

[0023] The first 5G wireless network access device and the third 5G wireless network access device are connected via a 5GHz frequency band wireless network.

[0024] As a preferred embodiment, the first control command, the second control command, the first monitoring signal, and the second monitoring signal are all Profibus-DP communication protocol signals.

[0025] As a preferred embodiment, the first control command includes both digital output control commands and analog output control commands for the equipment on the trolley.

[0026] As a preferred embodiment, the first monitoring signal includes both digital input signals and analog input signals from the equipment on the vehicle.

[0027] In addition, this application also provides a method for applying a 5G wireless communication loop to the PLC control system of a grab crane as described above, comprising:

[0028] The first DP communication protocol coupler receives the first control command issued by the CPU of the PLC control system and converts the first control command into a first industrial Ethernet protocol signal.

[0029] The first 5G wireless network access device receives the first industrial Ethernet protocol signal and transmits the first industrial Ethernet protocol signal as a 5G signal.

[0030] The second 5G wireless network access device on the vehicle receives the first industrial Ethernet protocol signal sent by the first 5G wireless network access device.

[0031] The second DP communication protocol coupler on the trolley receives the first industrial Ethernet protocol signal and converts it into the first control command to control the trolley.

[0032] The second DP communication protocol coupler receives the first monitoring signal from the trolley and converts the first monitoring signal into a third industrial Ethernet protocol signal;

[0033] The second 5G wireless network access device receives the third industrial Ethernet protocol signal and transmits the third industrial Ethernet protocol signal as a 5G signal;

[0034] The first 5G wireless network access device receives the third industrial Ethernet protocol signal and uploads it to the first DP communication protocol coupler; and

[0035] The first DP communication protocol coupler converts the third industrial Ethernet protocol signal into the first monitoring signal and uploads it to the CPU of the PLC control system.

[0036] As a preferred option, the following also include:

[0037] The first DP communication protocol coupler receives the second control command issued by the CPU of the PLC control system and converts the second control command into a second industrial Ethernet protocol signal.

[0038] The first 5G wireless network access device receives the second industrial Ethernet protocol signal and transmits the second industrial Ethernet protocol signal as a 5G signal.

[0039] The third 5G wireless network access device on the vehicle receives the second industrial Ethernet protocol signal sent by the first 5G wireless network access device.

[0040] The third DP communication protocol coupler on the vehicle receives the second industrial Ethernet protocol signal and converts it into the second control command to control the vehicle.

[0041] The third DP communication protocol coupler receives the second monitoring signal from the vehicle and converts the second monitoring signal into a fourth industrial Ethernet protocol signal;

[0042] The third 5G wireless network access device receives the fourth industrial Ethernet protocol signal and transmits the fourth industrial Ethernet protocol signal as a 5G signal.

[0043] The first 5G wireless network access device receives the fourth industrial Ethernet protocol signal and uploads it to the first DP communication protocol coupler; and

[0044] The first DP communication protocol coupler converts the fourth industrial Ethernet protocol signal into the second monitoring signal and uploads it to the CPU of the PLC control system.

[0045] Compared with the prior art, this application has the following beneficial effects:

[0046] This application provides a 5G wireless communication loop and method for a grab crane PLC control system. A low-latency, high-bandwidth 5G wireless network communication loop is deployed in the grab crane PLC system to establish communication connections between the central processing unit of the grab crane PLC system and the trolley and crane itself. This improves the operational stability and reliability of the grab crane PLC communication system, ensuring continuous and stable operation of the grab crane system and reducing system maintenance costs. It also increases the time for safe and stable operation of the enterprise, guaranteeing annual production and economic benefits; reduces the frequency of personnel working in harsh environments, minimizing the impact on personnel health; avoids potential environmental gas leaks caused by personnel working in harsh environments, reducing environmental risks; and reduces the frequency of personnel working at heights, lowering the risk of falls from heights. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0048] The structures, proportions, sizes, etc., shown in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this application. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0049] Figure 1 is a schematic diagram of the overall framework of the 5G wireless communication circuit of the PLC control system for the grab crane in this embodiment of the application.

[0050] Figure 2 is a flowchart of the method of this application;

[0051] Figure 3 is a flowchart of the method of this application;

[0052] Figure 4 is a schematic diagram of the signal communication circuit from the trolley to the CPU in this application;

[0053] Figure 5 is a schematic diagram of the signal communication circuit from the CPU to the trolley in this application;

[0054] Figure 6 is a schematic diagram of the signal communication circuit from the vehicle to the CPU in this application;

[0055] Figure 7 is a schematic diagram of the signal communication circuit from the CPU to the vehicle in this application. Detailed Implementation

[0056] 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.

[0057] In the description of this application, it should be understood that the orientations or positional relationships indicated by terms, etc., are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device, element, module, system, platform, or device referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The following description of this application is only to be understood as a description of individual embodiments of the technical solutions of this application. Other embodiments are not reflected in the following description, but this does not mean that this application excludes these other embodiments, nor is the technical solution of this application limited to the specific implementations described below, and the protection scope of this application is not limited to the specific implementations described below. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this application.

[0058] It should be noted that if the terms "first," "second," etc., appear in the specification, claims, and accompanying drawings of this application, such descriptions are only used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a system, product, or device that comprises a series of units, modules, or components is not necessarily limited to those explicitly listed, but may include other components not explicitly listed or inherent to such systems, products, or devices.

[0059] The technical solution of this application will be further described below with reference to the accompanying drawings and specific embodiments.

[0060] In some embodiments, as shown in FIG1, this application provides a 5G wireless communication loop 1 for a grab crane PLC control system. The grab crane includes a trolley 01 and a crane 02, and includes an RJ45 network cable; a first DP communication protocol coupler 11; a first 5G wireless network access device 12; a second 5G wireless network access device 13; a second DP communication protocol coupler 14; a third 5G wireless network access device 15; and a third DP communication protocol coupler 16.

[0061] Specifically, the first 5G wireless network access device 11 and the first DP communication protocol coupler 12 can be installed on the wall of the operating workshop of the grab crane, or installed in other locations in the operating workshop of the grab crane as a fixed installation. The first 5G wireless network access device 11 is connected to the first DP communication protocol coupler 12 via an RJ45 network cable.

[0062] The first DP communication protocol coupler 11 is used to receive the first control instruction and the second control instruction issued by the CPU00 of the PLC control system, and convert the first control instruction into a first industrial Ethernet protocol signal and the second control instruction into a second industrial Ethernet protocol signal.

[0063] The first 5G wireless network access device 12 is connected to the first DP communication protocol coupler 11. The first 5G wireless network access device 12 is used to receive the first industrial Ethernet protocol signal and the second industrial Ethernet protocol signal and send the first industrial Ethernet protocol signal and the second industrial Ethernet protocol signal out in the form of 5G signals.

[0064] The second 5G wireless network access device 13 and the second DP communication protocol coupler 14 can be installed in the remote PLC-IO station of the trolley 01. The second 5G wireless network access device 13 is connected to the second DP communication protocol coupler 14 via an RJ45 network cable.

[0065] The second 5G wireless network access device 13 is connected to the first 5G wireless network access device 12 and is used to receive the first industrial Ethernet protocol signal sent by the first 5G wireless network access device 12; specifically, the first 5G wireless network access device 12 and the second 5G wireless network access device 13 are connected via a 5GHz frequency band wireless network.

[0066] The second DP communication protocol coupler 14 is used to receive the first industrial Ethernet protocol signal and convert it into the first control command to control the trolley 01.

[0067] The third 5G wireless network access device 15 and the third DP communication protocol coupler 16 can be installed in the remote PLC-IO station of the vehicle 02. The third 5G wireless network access device 15 is connected to the third DP communication protocol coupler 16 via an RJ45 network cable.

[0068] The third 5G wireless network access device 15 is connected to the first 5G wireless network access device 12 and is used to receive the second industrial Ethernet protocol signal sent by the first 5G wireless network access device 12; specifically, the first 5G wireless network access device 12 and the third 5G wireless network access device 15 are connected via a 5GHz frequency band wireless network.

[0069] The third DP communication protocol coupler 16 is connected to the third 5G wireless network access device 15 and is used to receive the second industrial Ethernet protocol signal and convert it into the second control command to control the trolley 02.

[0070] Additionally, the second DP communication protocol coupler 14 is also used to receive the first monitoring signal from the trolley 01 and convert the first monitoring signal into a third industrial Ethernet protocol signal; the second 5G wireless network access device 13 is also used to receive the third industrial Ethernet protocol signal and transmit the third industrial Ethernet protocol signal in the form of a 5G signal; the first 5G wireless network access device 12 is also used to receive the third industrial Ethernet protocol signal and upload it to the first DP communication protocol coupler 11; the first DP communication protocol coupler 11 is also used to convert the third industrial Ethernet protocol signal into the first monitoring signal and upload it to the CPU 00 of the PLC control system;

[0071] The third DP communication protocol coupler 16 is also used to receive the second monitoring signal of the trolley 02 and convert the second monitoring signal into a fourth industrial Ethernet protocol signal; the third 5G wireless network access device 15 is also used to receive the fourth industrial Ethernet protocol signal and send the fourth industrial Ethernet protocol signal out in the form of a 5G signal; the first 5G wireless network access device 12 is also used to receive the fourth industrial Ethernet protocol signal and upload it to the first DP communication protocol coupler 11; the first DP communication protocol coupler 11 is also used to convert the fourth industrial Ethernet protocol signal into the second monitoring signal and upload it to the CPU 00 of the PLC control system.

[0072] Specifically, the first DP communication protocol coupler 11, the first 5G wireless network access device 12, the second 5G wireless network access device 13, the second DP communication protocol coupler 14, and the RJ45 network cable form a 5G wireless network for remote control of the grab crane trolley, enabling communication between control commands and detection signals.

[0073] The first DP communication protocol coupler 11, the first 5G wireless network access device 12, the third 5G wireless network access device 15, the third DP communication protocol coupler 16, and the RJ45 network cable form a 5G wireless network for remote control of the grab crane trolley, enabling communication of control commands and detection signals.

[0074] In some embodiments, the first control command, the second control command, the first monitoring signal, and the second monitoring signal are all Profibus-DP communication protocol signals. This enables the mutual conversion between industrial control communication protocols such as Profibus-DP and industrial Ethernet protocols in the grab crane PLC system, establishing communication between the grab crane control room control equipment and the trolley and crane itself.

[0075] In some embodiments, the first control command includes a digital output control command and an analog output control command for the equipment on the trolley 01; the second control command includes a digital output control command and an analog output control command for the equipment on the trolley 02.

[0076] In some embodiments, the first monitoring signal includes digital input signals and analog input signals of the equipment on the large vehicle 01; the second monitoring signal includes digital input signals and analog input signals of the equipment on the small vehicle 02.

[0077] In some embodiments, as shown in FIG2, this application also provides a method for applying a 5G wireless communication loop 1 to the PLC control system of a grab crane as described above, comprising:

[0078] S11: The first DP communication protocol coupler 11 receives the first control command issued by the CPU00 of the PLC control system and converts the first control command into a first industrial Ethernet protocol signal.

[0079] S12: The first 5G wireless network access device 12 receives the first industrial Ethernet protocol signal and sends the first industrial Ethernet protocol signal out in the form of a 5G signal;

[0080] S13: The second 5G wireless network access device 13 on the large vehicle 01 receives the first industrial Ethernet protocol signal sent by the first 5G wireless network access device 12.

[0081] S14: The second DP communication protocol coupler 14 on the trolley 01 receives the first industrial Ethernet protocol signal and converts it into the first control command to control the trolley 01.

[0082] S15: The second DP communication protocol coupler 14 receives the first monitoring signal from the trolley 01 and converts the first monitoring signal into a third industrial Ethernet protocol signal;

[0083] S16: The second 5G wireless network access device 13 receives the third industrial Ethernet protocol signal and sends the third industrial Ethernet protocol signal out in the form of a 5G signal;

[0084] S17: The first 5G wireless network access device 12 receives the third industrial Ethernet protocol signal and uploads it to the first DP communication protocol coupler 11; and

[0085] S18: The first DP communication protocol coupler 11 converts the third industrial Ethernet protocol signal into the first monitoring signal and uploads it to the CPU00 of the PLC control system.

[0086] In some embodiments, it also includes:

[0087] S21: The first DP communication protocol coupler 11 receives the second control command issued by the CPU00 of the PLC control system and converts the second control command into a second industrial Ethernet protocol signal;

[0088] S22: The first 5G wireless network access device 12 receives the second industrial Ethernet protocol signal and transmits the second industrial Ethernet protocol signal as a 5G signal;

[0089] S23: The third 5G wireless network access device 15 on the vehicle 02 receives the second industrial Ethernet protocol signal sent by the first 5G wireless network access device 12.

[0090] S24: The third DP communication protocol coupler 16 on the trolley 02 receives the second industrial Ethernet protocol signal and converts it into the second control command to control the trolley 02;

[0091] S25: The third DP communication protocol coupler 16 receives the second monitoring signal from the trolley 02 and converts the second monitoring signal into a fourth industrial Ethernet protocol signal;

[0092] S26: The third 5G wireless network access device 15 receives the fourth industrial Ethernet protocol signal and sends the fourth industrial Ethernet protocol signal out in the form of a 5G signal;

[0093] S27: The first 5G wireless network access device 12 receives the fourth industrial Ethernet protocol signal and uploads it to the first DP communication protocol coupler 11; and

[0094] S28: The first DP communication protocol coupler 11 converts the fourth industrial Ethernet protocol signal into the second monitoring signal and uploads it to the CPU00 of the PLC control system.

[0095] Specifically, the first DP communication coupler 11 operates as follows: the first DP communication protocol coupler 11 receives the Profibus-DP communication protocol control command signal from the CPU 00, converts the Profibus-DP communication protocol control command signal into an industrial Ethernet protocol signal, and sends it to the first 5G wireless network access device 12; when the monitoring signal of the trolley 01 is uploaded to the CPU 00, the first DP communication protocol coupler 11 receives the industrial Ethernet protocol signal from the first 5G wireless network device 12, converts the industrial Ethernet protocol control command signal into a Profibus-DP communication protocol signal, and uploads it to the CPU 00.

[0096] The second DP communication coupler 14 operates as follows: when the CPU 00 sends a control command to the trolley, the second DP communication coupler 14 receives the industrial Ethernet protocol control command signal from the second 5G wireless device 13, converts the industrial Ethernet protocol control command signal into a Profibus-DP communication protocol signal, and sends it to the trolley 01; when the monitoring signal of the trolley 01 is uploaded to the CPU 00, the second DP communication coupler 14 receives the Profibus-DP communication protocol signal, converts the Profibus-DP communication protocol signal into an industrial Ethernet protocol signal, and uploads it to the second 5G wireless network device 13.

[0097] The third DP communication coupler 56 operates as follows: when the CPU 00 sends a control command to the vehicle 02, the third DP communication protocol coupler 16 receives the industrial Ethernet protocol control command signal from the third 5G wireless device 15, converts the industrial Ethernet protocol control command signal into a Profibus-DP communication protocol signal, and sends it to the vehicle; when the vehicle's monitoring signal is uploaded to the CPU 00, the third DP communication protocol coupler 16 receives the Profibus-DP communication protocol signal, converts the Profibus-DP communication protocol signal into an industrial Ethernet protocol signal, and uploads it to the third 5G wireless network device 15.

[0098] The signal interaction circuit between the large vehicle 01, the small vehicle 02, and the CPU 00 is as follows:

[0099] As shown in Figure 4, the digital and analog input signals of the field equipment of the trolley 01 are collected and uploaded to the CPU 00 of the PLC system through the 5G industrial control wireless network communication loop 1. The signal communication loop is as follows: the Profibus-DP communication protocol signal of the trolley → the 5G wireless communication Ethernet protocol signal of the second DP communication protocol coupler 14 → the 5G wireless communication Ethernet protocol signal of the second 5G wireless network access device 13 → the 5G wireless communication Ethernet protocol signal of the first 5G wireless network access device 12 → the Profibus-DP communication protocol signal of the first DP communication protocol coupler 11 → CPU 00.

[0100] As shown in Figure 5, the switch output and analog output control command signals of the CPU00 are transmitted to the trolley via the 5G wireless network communication loop 1 in the following order: CPU00's Profibus-DP communication protocol signal → the 5G wireless communication Ethernet protocol signal of the first DP communication coupler 11 → the 5G wireless communication Ethernet protocol signal of the first 5G wireless network access device 12 → the 5G wireless communication Ethernet protocol signal of the second 5G wireless network access device 13 → the Profibus-DP communication protocol signal of the second DP communication protocol coupler 14 → the trolley.

[0101] As shown in Figure 6, the trolley 02 collects the digital and analog input signals from the field devices and uploads them to the CPU 00 of the PLC system via the 5G industrial control wireless network communication loop 1. The signal upload communication loop is as follows: Profibus-DP communication protocol signal of trolley 02 → 5G wireless communication Ethernet protocol signal of the third DP communication protocol coupler 16 → 5G wireless communication Ethernet protocol signal of the third 5G wireless network access device 15 → 5G wireless communication Ethernet protocol signal of the first 5G wireless network access device 12 → Profibus-DP communication protocol signal of the first DP communication protocol coupler 11 → CPU 00.

[0102] As shown in Figure 7, the switch output and analog output control command signals of the CPU00 are transmitted to the vehicle's signal communication circuit through the 5G wireless network communication circuit 1 in the following order: CPU00's Profibus-DP communication protocol signal → the 5G wireless communication Ethernet protocol signal of the first DP communication protocol coupler 11 → the 5G wireless communication Ethernet protocol signal of the first 5G wireless network access device 12 → the 5G wireless communication Ethernet protocol signal of the third 5G wireless network access device 14 → the Profibus-DP communication protocol signal of the third DP communication protocol coupler 16 → the vehicle.

[0103] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0104] The above-described embodiments are merely illustrative of several implementation methods of this application and are only used to illustrate the technical solutions of this application, not to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application. For those skilled in the art, several variations and improvements can be made without departing from the concept of this application, and these all fall within the protection scope of this application.

Claims

1. A 5G wireless communication circuit for a PLC control system of a grab crane, the grab crane comprising a trolley and a crane arm, characterized in that, include: The first DP communication protocol coupler is used to receive the first control instruction and the second control instruction issued by the CPU of the PLC control system, and convert the first control instruction into a first industrial Ethernet protocol signal and the second control instruction into a second industrial Ethernet protocol signal. The first 5G wireless network access device is connected to the first DP communication protocol coupler and is used to receive the first industrial Ethernet protocol signal and the second industrial Ethernet protocol signal and send the first industrial Ethernet protocol signal and the second industrial Ethernet protocol signal out in the form of 5G signals. The second 5G wireless network access device is installed on the vehicle and connected to the first 5G wireless network access device, and is used to receive the first industrial Ethernet protocol signal sent by the first 5G wireless network access device. The second DP communication protocol coupler is installed on the trolley and connected to the second 5G wireless network access device. It is used to receive the first industrial Ethernet protocol signal and convert it into the first control command to control the trolley. A third 5G wireless network access device is installed on the vehicle and connected to the first 5G wireless network access device, and is used to receive the second industrial Ethernet protocol signal sent by the first 5G wireless network access device. as well as A third DP communication protocol coupler is installed on the vehicle and connected to the third 5G wireless network access device. It is used to receive the second industrial Ethernet protocol signal and convert it into the second control command to control the vehicle. The second DP communication protocol coupler is further configured to receive the first monitoring signal from the trolley and convert the first monitoring signal into a third industrial Ethernet protocol signal; the second 5G wireless network access device is further configured to receive the third industrial Ethernet protocol signal and transmit the third industrial Ethernet protocol signal as a 5G signal; the first 5G wireless network access device is further configured to receive the third industrial Ethernet protocol signal and upload it to the first DP communication protocol coupler; the first DP communication protocol coupler is further configured to convert the third industrial Ethernet protocol signal into the first monitoring signal and upload it to the CPU of the PLC control system; The third DP communication protocol coupler is also used to receive the second monitoring signal of the vehicle and convert the second monitoring signal into a fourth industrial Ethernet protocol signal; the third 5G wireless network access device is also used to receive the fourth industrial Ethernet protocol signal and transmit the fourth industrial Ethernet protocol signal in the form of a 5G signal; the first 5G wireless network access device is also used to receive the fourth industrial Ethernet protocol signal and upload it to the first DP communication protocol coupler; the first DP communication protocol coupler is also used to convert the fourth industrial Ethernet protocol signal into the second monitoring signal and upload it to the CPU of the PLC control system.

2. The 5G wireless communication circuit of the grab crane PLC control system according to claim 1, characterized in that: The first 5G wireless network access device and the first DP communication protocol coupler are installed on the wall of the operating workshop of the grab crane.

3. The 5G wireless communication circuit of the grab crane PLC control system according to claim 1, characterized in that: The first 5G wireless network access device is connected to the first DP communication protocol coupler via an RJ45 network cable. The second 5G wireless network access device is connected to the second DP communication protocol coupler via an RJ45 network cable; The third 5G wireless network access device is connected to the third DP communication protocol coupler via an RJ45 network cable.

4. The 5G wireless communication circuit of the grab crane PLC control system according to claim 1, characterized in that: The second 5G wireless network access device and the second DP communication protocol coupler are installed in the remote PLC-IO station of the trolley; The third 5G wireless network access device and the third DP communication protocol coupler are installed in the remote PLC-IO station of the vehicle.

5. The 5G wireless communication circuit of the grab crane PLC control system according to claim 1, characterized in that: The first 5G wireless network access device and the second 5G wireless network access device are connected via a 5GHz frequency band wireless network. The first 5G wireless network access device and the third 5G wireless network access device are connected via a 5GHz frequency band wireless network.

6. The 5G wireless communication circuit of the grab crane PLC control system according to claim 1, characterized in that: The first control command, the second control command, the first monitoring signal, and the second monitoring signal are all Profibus-DP communication protocol signals.

7. The 5G wireless communication circuit of the grab crane PLC control system according to claim 6, characterized in that: The first control command includes digital output control commands and analog output control commands for the equipment on the trolley.

8. The 5G wireless communication circuit of the grab crane PLC control system according to claim 7, characterized in that: The first monitoring signal includes digital input signals and analog input signals from the equipment on the trolley.

9. A method for applying to the 5G wireless communication circuit of a grab crane PLC control system as described in any one of claims 1-8, characterized in that, include: The first DP communication protocol coupler receives the first control command issued by the CPU of the PLC control system and converts the first control command into a first industrial Ethernet protocol signal. The first 5G wireless network access device receives the first industrial Ethernet protocol signal and transmits the first industrial Ethernet protocol signal as a 5G signal. The second 5G wireless network access device on the vehicle receives the first industrial Ethernet protocol signal sent by the first 5G wireless network access device. The second DP communication protocol coupler on the trolley receives the first industrial Ethernet protocol signal and converts it into the first control command to control the trolley. The second DP communication protocol coupler receives the first monitoring signal from the trolley and converts the first monitoring signal into a third industrial Ethernet protocol signal; The second 5G wireless network access device receives the third industrial Ethernet protocol signal and transmits the third industrial Ethernet protocol signal as a 5G signal; The first 5G wireless network access device receives the third industrial Ethernet protocol signal and uploads it to the first DP communication protocol coupler; and The first DP communication protocol coupler converts the third industrial Ethernet protocol signal into the first monitoring signal and uploads it to the CPU of the PLC control system.

10. The method according to claim 9, characterized in that, Also includes: The first DP communication protocol coupler receives the second control command issued by the CPU of the PLC control system and converts the second control command into a second industrial Ethernet protocol signal. The first 5G wireless network access device receives the second industrial Ethernet protocol signal and transmits the second industrial Ethernet protocol signal as a 5G signal. The third 5G wireless network access device on the vehicle receives the second industrial Ethernet protocol signal sent by the first 5G wireless network access device. The third DP communication protocol coupler on the vehicle receives the second industrial Ethernet protocol signal and converts it into the second control command to control the vehicle. The third DP communication protocol coupler receives the second monitoring signal from the vehicle and converts the second monitoring signal into a fourth industrial Ethernet protocol signal; The third 5G wireless network access device receives the fourth industrial Ethernet protocol signal and transmits the fourth industrial Ethernet protocol signal as a 5G signal. The first 5G wireless network access device receives the fourth industrial Ethernet protocol signal and uploads it to the first DP communication protocol coupler; and The first DP communication protocol coupler converts the fourth industrial Ethernet protocol signal into the second monitoring signal and uploads it to the CPU of the PLC control system.

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