Hybrid communication system for a cable crane

Abstract

The utility model discloses a kind of cable crane hybrid communication systems, it is related to electrical control communication field;Including cab PLC control station, communication transfer station, main tower PLC control station, vice tower PLC control station and trolley PLC slave station;The communication transfer station is bridged with main tower PLC control station, main tower PLC control station is bridged with vice tower PLC control station, main tower PLC control station is bridged with trolley PLC slave station, vice tower PLC control station is bridged with trolley PLC slave station;Transfer station switch and transfer station PLC controller are connected, the cab switch of cab PLC control station is connected with transfer station switch by wire, main tower PLC control station is connected with transfer station PLC controller by wire, and the wireless network bridge of transfer station is bridged with the wireless network bridge of main tower PLC control station;The utility model cab PLC control station is connected with communication transfer station by wire, signal is sent to main tower by transfer station, and the electromagnetic interference of external environment is greatly avoided in the mode of wired connection, and transmission stability is increased.

Description

Technical Field

[0001] This utility model relates to the field of electrical control and communication, and in particular to a hybrid communication system for cable cranes. Background Technology

[0002] Cable cranes for hydropower stations are generally used for hoisting concrete for dam construction and installing metal structures. The main and auxiliary towers of the cable crane are located on opposite banks of the riverbed and need to move upstream and downstream. To facilitate operator visibility of the concrete hopper area, the crane's operator's cab is typically located on the hopper's loading platform. This necessitates communication and data exchange between the operator's cab's PLC control station and the main tower's, auxiliary tower's, and relay stations' PLC control stations. However, the movement of the main and auxiliary towers causes changes in the angle of the communication network bridge with the operator's cab, which can easily lead to communication interruptions and unreliable communication, affecting the efficiency of dam construction.

[0003] In existing hybrid communication systems for cable cranes, Chinese invention patent CN204454327U, titled "Wireless Real-Time Control System for Cable Cranes Based on DATA-LINC," discloses a control system comprising a main tower PLC system, a driver's cab PLC system, and an auxiliary vehicle PLC system. The main tower PLC system is connected to both the driver's cab and auxiliary vehicle PLC systems via a radio modem. The main tower PLC system consists of a programmable controller, a first radio modem, a second radio modem, a speed controller, and a main tower motor. The driver's cab PLC system consists of a radio modem, a programmable controller, a GP touchscreen, and a control console. The auxiliary vehicle PLC system consists of a radio modem, a programmable controller, a speed controller, and an auxiliary vehicle motor. The programmable controller comprises a power module and a CPU. The system consists of modules, I / O digital modules, RS232 serial communication modules, and SM338 modules. The main tower PLC system has two RS232 serial communication modules, which are connected to two corresponding radio modems for communicating, receiving, and sending data with the driver's cab PLC and the auxiliary vehicle PLC system. The driver's cab PLC and the auxiliary vehicle PLC system are also connected to the radio modems via RS232 serial communication modules. The programmable controller is a Siemens SIMATIC S7-300 programmable controller, and the radio modem is a 2.4GHz FM spread spectrum communication device SRM6100 manufactured by DATA-LINCGROUP.

[0004] The above document has the following problems:

[0005] 1. The driver's cab system connects to the main tower and auxiliary vehicle via a radio modem. In complex environments, extreme weather, and long operating distances, the stability of the radio modem during use may be affected.

[0006] 2. Radio modems have narrow bandwidth, slow transmission rates, and limited communication data volume. Summary of the Invention

[0007] The purpose of this invention is to overcome the aforementioned problems of the prior art and propose a hybrid communication system for cable cranes, which solves the problem of poor stability of radio modems in the prior art.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0009] A hybrid communication system for a cable crane, characterized in that it includes a driver's cab PLC control station, a communication relay station, a main tower PLC control station, an auxiliary tower PLC control station, and a trolley PLC slave station; the communication relay station is bridged with the main tower PLC control station, the main tower PLC control station is bridged with the auxiliary tower PLC control station, the main tower PLC control station is bridged with the trolley PLC slave station, and the auxiliary tower PLC control station is bridged with the trolley PLC slave station; the communication relay station includes a relay station switch, a relay station PLC controller, and a relay station wireless bridge; the relay station switch and the relay station PLC controller are connected; the driver's cab switch of the driver's cab PLC control station is connected to the relay station switch via a wired connection; the main tower PLC control station is connected to the relay station PLC controller via a wired connection; and the relay station wireless bridge is bridged with the wireless bridge of the main tower PLC control station.

[0010] The driver's cab switch and the transfer station switch are connected via redundant optical fibers.

[0011] The driver's cab PLC control station includes a driver's cab industrial computer, a driver's cab PLC controller, and a driver's cab switch. The driver's cab switch is connected to the driver's cab PLC controller and the driver's cab industrial computer, respectively.

[0012] The main tower PLC control station includes a main tower wireless bridge, a main tower radio, a main tower PLC controller, a main tower switch, and a main tower frequency converter driver. The main tower switch is connected to the main tower wireless bridge, the main tower PLC controller, and the main tower frequency converter driver. The serial port module in the main tower PLC controller is connected to the main tower radio.

[0013] The main tower PLC controller and the transfer station PLC controller are connected via a twisted-pair shielded cable.

[0014] The secondary tower PLC control station includes a secondary tower PLC controller, a secondary tower switch, a secondary tower frequency converter driver, a secondary tower wireless bridge, and a secondary tower radio. The secondary tower switch is connected to the secondary tower PLC controller, the secondary tower frequency converter, and the secondary tower wireless bridge, respectively, and the secondary tower radio is connected to the serial port module in the secondary tower PLC controller.

[0015] The trolley PLC slave station includes a trolley PLC slave station wireless bridge, a trolley PLC controller, a GPS receiver, and a GPS radio. The trolley PLC controller is connected to the trolley PLC slave station wireless bridge and the GPS receiver, respectively, and the GPS receiver is connected to the GPS radio.

[0016] The antenna of the relay station wireless bridge is bridged to the first antenna of the main tower wireless bridge; the second antenna of the main tower wireless bridge is bridged to the antenna of the auxiliary tower wireless bridge and the antenna of the trolley PLC slave station wireless bridge.

[0017] The antenna of the secondary tower radio station is bridged with the antenna of the main tower radio station.

[0018] The antenna of the PLC slave wireless bridge on the trolley is bridged with the antenna of the secondary tower wireless bridge; the GPS receiver and GPS radio are bridged with an external GPS base station.

[0019] The advantages of using this utility model are:

[0020] I. Compared with the prior art, this utility model establishes a communication relay station, and the driver's cab PLC control station is connected to the communication relay station via a wired connection. The relay station sends signals to the main tower. The wired connection greatly avoids electromagnetic interference from the external environment and increases transmission stability. The establishment of the communication relay station greatly shortens the transmission distance between the driver's control room and the main tower PLC control station. At the same time, the communication relay station and the main tower PLC control station adopt both bridging and wired connection methods. When the wireless bridge connection fails, the control system switches to wired communication, which greatly improves transmission stability.

[0021] II. This utility model uses two methods for control: bridging the main tower PLC control station and the secondary tower PLC control station, namely wireless bridge and radio. When the wireless bridge connection fails, the control system switches to radio communication to ensure the stability of communication between the main tower and the secondary tower.

[0022] Third, this utility model adopts a communication method that combines wireless and wired communication, which improves transmission efficiency while ensuring stable communication.

[0023] Fourth, the main tower wireless bridge, the secondary tower wireless bridge, and the trolley slave station wireless bridge adopt a Mesh working mode to form a wireless bridge ring network, which can effectively avoid the problem that if one wireless bridge fails, the other two wireless bridges will not be able to transmit data.

[0024] 5. The vehicle's GPS receiver and external GPS provide real-time feedback on the vehicle's position, effectively locating the vehicle and ensuring precise construction. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the cable crane control system of this utility model;

[0026] Figure 2 This is a schematic diagram of the communication signals of the cable crane control system of this utility model.

[0027] Attached reference numerals: 1. Driver's cab PLC control station; 2. Communication relay station; 3. Main tower PLC control station; 4. Secondary tower PLC control station; 5. Cart PLC slave station; 6. Relay station switch; 7. Relay station PLC controller; 8. Relay station wireless bridge; 9. Driver's cab switch; 10. Driver's cab PLC controller; 11. Driver's cab industrial computer; 12. Main tower wireless bridge; 13. Main tower radio; 14. Main tower PLC controller; 15. Main tower switch; 16. Main tower frequency converter driver; 17. Secondary tower PLC controller; 18. Secondary tower switch; 19. Secondary tower frequency converter driver; 20. Secondary tower wireless bridge; 21. Secondary tower radio; 22. Cart PLC slave station wireless bridge; 23. Cart PLC controller; 24. GPS receiver; 25. GPS radio; 26. External GPS base station; 27. First antenna; 28. Second antenna. Detailed Implementation

[0028] Example 1

[0029] A hybrid communication system for a cable crane includes a driver's cab PLC control station 1, a communication relay station 2, a main tower PLC control station 3, an auxiliary tower PLC control station 4, and a trolley PLC slave station 5. The communication relay station 2 is bridged with the main tower PLC control station 3, the main tower PLC control station 3 is bridged with the auxiliary tower PLC control station 4, the main tower PLC control station 3 is bridged with the trolley PLC slave station 5, and the auxiliary tower PLC control station 4 is bridged with the trolley PLC slave station 5. The communication relay station 2 includes a relay station switch 6, a relay station PLC controller 7, and a relay station wireless bridge 8. The relay station switch 6 and the relay station PLC controller 7 are connected. The driver's cab switch 9 of the driver's cab PLC control station 1 is wiredly connected to the relay station switch 6. The main tower PLC control station 3 is wiredly connected to the relay station PLC controller 7. The relay station wireless bridge 8 is bridged with the wireless bridge 12 of the main tower PLC control station 3.

[0030] The driver's cab switch 9 and the transfer station switch 6 are connected via redundant optical fibers.

[0031] The driver's cab PLC control station 1 includes a driver's cab industrial computer 11, a driver's cab PLC controller 10, and a driver's cab switch 9. The driver's cab switch 9 is connected to the driver's cab PLC controller 10 and the driver's cab industrial computer 11, respectively.

[0032] The main tower PLC control station 3 includes a main tower wireless bridge 12, a main tower radio 13, a main tower PLC controller 14, a main tower switch 15, and a main tower frequency converter driver 16. The main tower switch 15 is connected to the main tower wireless bridge 12, the main tower PLC controller 14, and the main tower frequency converter driver 16. The serial port module in the main tower PLC controller 14 is connected to the main tower radio 13.

[0033] The main tower PLC controller 14 and the transfer station PLC controller 7 are connected by a twisted-pair shielded cable.

[0034] The secondary tower PLC control station 4 includes a secondary tower PLC controller 17, a secondary tower switch 18, a secondary tower frequency converter driver 19, a secondary tower wireless bridge 20, and a secondary tower radio 21; the secondary tower switch 18 is connected to the secondary tower PLC controller 17, the secondary tower frequency converter, and the secondary tower wireless bridge 20 respectively, and the secondary tower radio 21 is connected to the serial port module in the secondary tower PLC controller 17.

[0035] The trolley PLC slave station 5 includes a trolley PLC slave wireless bridge 22, a trolley PLC controller 23, a GPS receiver 24, and a GPS radio 25. The trolley PLC controller 23 is connected to the trolley PLC slave wireless bridge 22 and the GPS receiver 24, respectively, and the GPS receiver 24 is connected to the GPS radio 25.

[0036] The antenna of the relay station wireless bridge 8 is bridged with the first antenna 27 of the main tower wireless bridge 12; the second antenna 28 of the main tower wireless bridge 12 is bridged with the antenna of the auxiliary tower wireless bridge 20 and the antenna of the trolley PLC slave station wireless bridge 22.

[0037] The antenna of the secondary tower radio station 21 is bridged with the antenna of the main tower radio station 13.

[0038] The antenna of the PLC slave wireless bridge 22 of the trolley is bridged with the antenna of the secondary tower wireless bridge 20; the GPS receiver 24 and GPS radio 25 are bridged with the external GPS base station 26.

[0039] like Figure 1-2As shown, the cable crane control system includes a PLC control station 1 in the operator's cab, a communication relay station 2 in the middle of the main tower track, a PLC control station 3 on the main tower, a PLC control station 4 on the auxiliary tower, and a PLC slave station 5 on the trolley. To facilitate the relocation of the operator's cab according to different construction phases, a communication relay station 2 is located in the middle of the main tower track. The PLC control station 1 in the operator's cab and the communication relay station 2 are connected using redundant fiber optic cables to increase the reliability of communication and data exchange. The communication relay station 2 is connected to the main tower PLC control station 3 using either a wireless bridge or a hard-wired connection via a twisted-pair shielded cable reel. Wireless bridge communication takes priority, with hard-wired communication as a backup. The main tower PLC control station 3 is connected to the auxiliary tower PLC control station 4 using either a wireless bridge or a radio (wireless bridge communication takes priority, with radio communication as a backup). The main tower PLC control station 3 is connected to the trolley PLC slave station 5 via a wireless bridge.

[0040] The PLC control station 1 in the driver's cab and the communication relay station 2 are connected by redundant optical fiber and use ProfiNET RT real-time Ethernet communication, which is suitable for occasions with periodic data exchange; it ensures the completion of periodic data exchange and a certain degree of real-time performance, with a cycle period of less than 10ms.

[0041] Communication relay station 2 and main tower PLC control station 3 are connected via two methods: wireless bridge bridging and hard-wired connection using twisted-pair shielded cables via cable reel. The wireless bridge is a high-performance, high-bandwidth, multi-functional, outdoor industrial-grade wireless roaming base station operating in the 4.9-6.0GHz frequency band (no application required, no license required). The wireless bridge uses advanced AC technology, providing up to 1733Mbps bandwidth, fully meeting the requirements for high-bandwidth wireless networking. When the wireless bridge is connected, main tower PLC control station 3 communicates with the relay station via ProfiNET RT real-time Ethernet. In the event of a wireless bridge connection failure, the control system automatically or manually switches to ProfiBUS DP wired communication, with a communication rate of up to 12Mbps.

[0042] The main tower PLC control station 3 and the secondary tower PLC control station 4 are connected via two methods: a wireless bridge and a radio. When connected via a wireless bridge, the main tower PLC control station 3 and the secondary tower PLC control station 4 communicate via ProfiNET RT real-time Ethernet. In the event of a wireless bridge connection failure, the control system automatically or manually switches to wired communication via an RS485 serial port connected by a radio. The main tower wireless bridge, the secondary tower wireless bridge, and the trolley slave station wireless bridge operate in Mesh mode, forming a wireless bridge ring network.

[0043] The main tower PLC control station 3 and the trolley PLC slave station 5 are connected by a wireless bridge and use ProfiNET RT real-time Ethernet communication.

[0044] The PLC controllers for the aforementioned communication relay station, driver's cab, main tower, auxiliary tower, and trolley all use Siemens S7-1200.

Claims

1. A hybrid communication system for cable cranes, characterized in that: It includes a driver's cab PLC control station (1), a communication relay station (2), a main tower PLC control station (3), a secondary tower PLC control station (4), and a trolley PLC slave station (5); the communication relay station (2) is bridged with the main tower PLC control station (3), the main tower PLC control station (3) is bridged with the secondary tower PLC control station (4), the main tower PLC control station (3) is bridged with the trolley PLC slave station (5), and the secondary tower PLC control station (4) is bridged with the trolley PLC slave station (5); the communication relay station (2) is bridged with the main tower PLC control station (3), the main tower PLC control station (3) is bridged with the trolley PLC slave station (5), and the secondary tower PLC control station (4) is bridged with the trolley PLC slave station (5); the communication relay station (2) is bridged with the main tower PLC control station (3), the secondary tower PLC control station (4), and the trolley PLC slave station (5). Station (2) includes a transfer station switch (6), a transfer station PLC controller (7) and a transfer station wireless bridge (8). The transfer station switch (6) and the transfer station PLC controller (7) are connected. The driver's cab switch (9) of the driver's cab PLC control station (1) is connected to the transfer station switch (6) via a wire. The main tower PLC control station (3) is connected to the transfer station PLC controller (7) via a wire. The transfer station wireless bridge (8) is bridged to the wireless bridge (12) of the main tower PLC control station (3).

2. The hybrid communication system for cable cranes according to claim 1, characterized in that: The driver's cab switch (9) and the transfer station switch (6) are connected by redundant optical fibers.

3. A hybrid communication system for cable cranes according to claim 1 or 2, characterized in that: The driver's cab PLC control station (1) includes a driver's cab industrial computer (11), a driver's cab PLC controller (10), and a driver's cab switch (9). The driver's cab switch (9) is connected to the driver's cab PLC controller (10) and the driver's cab industrial computer (11), respectively.

4. The hybrid communication system for cable cranes according to claim 3, characterized in that: The main tower PLC control station (3) includes a main tower wireless bridge (12), a main tower radio (13), a main tower PLC controller (14), a main tower switch (15), and a main tower frequency converter driver (16). The main tower switch (15) is connected to the main tower wireless bridge (12), the main tower PLC controller (14), and the main tower frequency converter driver (16). The serial port module in the main tower PLC controller (14) is connected to the main tower radio (13).

5. A hybrid communication system for cable cranes according to claim 4, characterized in that: The main tower PLC controller (14) and the transfer station PLC controller (7) are connected by a twisted-pair shielded cable.

6. A hybrid communication system for cable cranes according to claim 1, 2, or 4, characterized in that: The secondary tower PLC control station (4) includes a secondary tower PLC controller (17), a secondary tower switch (18), a secondary tower frequency converter driver (19), a secondary tower wireless bridge (20), and a secondary tower radio (21); the secondary tower switch (18) is connected to the secondary tower PLC controller (17), the secondary tower frequency converter, and the secondary tower wireless bridge (20) respectively, and the secondary tower radio (21) is connected to the serial port module in the secondary tower PLC controller (17).

7. A hybrid communication system for cable cranes according to claim 6, characterized in that: The trolley PLC slave station (5) includes a trolley PLC slave station wireless bridge (22), a trolley PLC controller (23), a GPS receiver (24) and a GPS radio (25). The trolley PLC controller (23) is connected to the trolley PLC slave station wireless bridge (22) and the GPS receiver (24) respectively, and the GPS receiver (24) is connected to the GPS radio (25).

8. A hybrid communication system for cable cranes according to claim 4 or 5, characterized in that: The antenna of the relay station wireless bridge (8) is bridged with the first antenna (27) of the main tower wireless bridge (12); the second antenna (28) of the main tower wireless bridge (12) is bridged with the antenna of the auxiliary tower wireless bridge (20) and the antenna of the trolley PLC slave station wireless bridge (22).

9. A hybrid communication system for cable cranes according to claim 6, characterized in that: The antenna of the secondary tower radio station (21) is bridged with the antenna of the main tower radio station (13).

10. A hybrid communication system for cable cranes according to claim 7, characterized in that: The antenna of the PLC slave wireless bridge (22) of the trolley is bridged with the antenna of the secondary tower wireless bridge (20); the GPS receiver (24) and GPS radio (25) are bridged with the external GPS base station (26).

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