A multi-signal communication system for port mobile equipment

Abstract

The purpose of this invention is to address the shortcomings of existing data communication systems that use optical fiber composite cables for transmission. These cables are prone to signal attenuation during transmission, requiring additional equipment to enhance the signal, resulting in complex overall structures and high maintenance and installation costs. This invention provides a multi-signal communication system for port mobile equipment. This system includes an electrical signal acquisition device, a main signal transmission line, a signal transmission verification line, and a remote monitoring terminal. The electrical signals acquired by the acquisition device are simultaneously transmitted to both the main signal transmission line and the verification line. This multi-signal communication system for port mobile equipment, employing the structure of this invention, ensures fast, stable, and reliable signal transmission without the need for additional auxiliary equipment to prevent signal attenuation. Furthermore, since optical fiber is significantly cheaper than electrical cable, substantial costs can be saved.

Description

Technical Field

[0001] This utility model belongs to the technical field of port communication systems, and specifically relates to a multi-signal communication system for port mobile equipment. Background Technology

[0002] Port mobile loading and unloading equipment plays a crucial role in port transportation, placing higher demands on its automation and intelligence. This is particularly true for data communication systems, which require real-time, rapid, accurate, and reliable signal transmission. Because reliable control of various equipment actions is essential during operation, fiber-optic composite cables are used as signal transmission lines to transmit verification signals. Fiber-optic composite cables are composite communication cables that integrate optical fibers and electrical cables. The optical fiber portion is used for high-speed transmission of image and video data, while the electrical cable portion is used to transmit control signals with high latency and reliability requirements. However, fiber-optic composite cables have the following problems: high cost: the complex structure and high material cost of composite cables limit their widespread application in large-scale systems; signal attenuation during long-distance transmission necessitates signal enhancement equipment. Therefore, a new data and control signal transmission scheme is urgently needed that can reduce the overall system construction and maintenance costs while ensuring communication performance. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing data communication systems that use optoelectronic composite cables as the transmission medium. These cables are prone to signal attenuation during transmission and require equipment to enhance the signal, resulting in complex overall equipment structures and high maintenance and installation costs. This invention provides a multi-signal communication system for port mobile equipment.

[0004] The technical solution to the technical problem solved by this utility model is as follows:

[0005] A multi-signal communication system for mobile equipment in ports includes an electrical signal acquisition device, a main signal transmission line, a signal transmission verification line, and a remote monitoring terminal. The electrical signals acquired by the electrical signal acquisition device are simultaneously transmitted to both the main signal transmission line and the signal transmission verification line. The signal transmission verification line includes a field-side electro-optical signal bidirectional conversion device, an optical fiber, and a terminal-side electro-optical signal bidirectional conversion device. The input terminal of the electrical signal acquisition device is connected to the field-side electro-optical signal bidirectional conversion device via an electrical signal connection. The field-side electro-optical signal bidirectional conversion device and the terminal-side electro-optical signal bidirectional conversion device are bidirectionally connected via optical fiber. The terminal-side electro-optical signal bidirectional conversion device is connected to the remote monitoring terminal. The monitoring terminal has a bidirectional electrical signal connection. The field-side electro-optical signal bidirectional conversion device converts the electrical signal into an optical signal. The optical signal is then transmitted to the terminal-side electro-optical signal bidirectional conversion device via optical fiber. The terminal-side electro-optical signal bidirectional conversion device converts the optical signal back into an electrical signal and transmits it to the remote monitoring terminal. The remote monitoring terminal processes the electrical signal and converts it back into an optical signal via the terminal-side electro-optical signal bidirectional conversion device. The optical signal is then transmitted to the field-side electro-optical signal bidirectional conversion device via optical fiber. The field-side electro-optical signal bidirectional conversion device converts the signal back into an electrical signal. The electrical signal converted back by the field-side electro-optical signal bidirectional conversion device is then sent to actuator one.

[0006] The electro-optic signal bidirectional conversion device is a bidirectional optical transceiver that can convert electrical signals into optical signals and vice versa. The input terminal 1 of the field-side bidirectional optical transceiver is connected to the electrical signal acquisition device, and its output terminal 1 is connected to the input terminal 1 of the terminal-side bidirectional optical transceiver via optical fiber. The output terminal 1 of the terminal-side bidirectional optical transceiver is electrically connected to the input terminal of the remote monitoring terminal. The output terminal of the remote monitoring terminal is electrically connected to the input terminal 2 of the terminal-side bidirectional optical transceiver. The output terminal 2 of the terminal-side bidirectional optical transceiver is connected to the input terminal 2 of the field-side bidirectional optical transceiver via optical fiber. The output terminal 2 of the field-side bidirectional optical transceiver is used for electrical connection with actuator 1.

[0007] The electrical signal acquisition device includes at least one of an audio / video signal acquisition device, a control signal acquisition device, and a communication-type industrial fieldbus signal acquisition device. Correspondingly, the electro-optical signal bidirectional conversion device includes at least one of an audio / video bidirectional optical transceiver, a control signal bidirectional optical transceiver, and a communication bidirectional optical transceiver.

[0008] The aforementioned electro-optic signal bidirectional conversion device includes at least one of an audio / video bidirectional optical transceiver, a control signal bidirectional optical transceiver, and a communication bidirectional optical transceiver.

[0009] The audio / video signal acquisition device is a camera. The input terminal of the on-site audio / video two-way optical transceiver is connected to the camera via electrical signal. The on-site audio / video two-way optical transceiver and the terminal-side audio / video two-way optical transceiver are bidirectionally connected via optical fiber. The output terminal of the terminal-side audio / video two-way optical transceiver is connected to the input terminal of the remote monitoring terminal via electrical signal.

[0010] The control signal acquisition device includes at least one of a digital signal acquisition device and an analog signal acquisition device.

[0011] The switch signal acquisition device is connected to the input terminal 1 of the field-side electro-optical bidirectional conversion switch optical transceiver. The output terminal 1 of the field-side electro-optical bidirectional conversion switch optical transceiver is connected to the input terminal 1 of the terminal-side electro-optical bidirectional conversion switch optical transceiver via optical fiber. The output terminal 1 of the terminal-side electro-optical bidirectional conversion switch optical transceiver is connected to the input terminal of the remote monitoring terminal. The remote monitoring terminal processes the switch signal. The output terminal of the remote monitoring terminal is connected to the input terminal 2 of the terminal-side electro-optical bidirectional conversion switch optical transceiver. The output terminal 2 of the terminal-side electro-optical bidirectional conversion switch optical transceiver is connected to the input terminal 2 of the field-side electro-optical bidirectional conversion switch optical transceiver via optical fiber. The output terminal 2 of the field-side electro-optical bidirectional conversion switch optical transceiver is used to connect to actuator 1.

[0012] The analog signal acquisition device is electrically connected to the input terminal 1 of the field-side electro-optic bidirectional conversion analog optical transceiver. The output terminal 1 of the field-side electro-optic bidirectional conversion analog optical transceiver is connected to the input terminal 1 of the terminal-side electro-optic bidirectional conversion analog optical transceiver via optical fiber. The output terminal 1 of the terminal-side electro-optic bidirectional conversion analog optical transceiver is electrically connected to the input terminal of the remote monitoring terminal. The output terminal of the remote monitoring terminal is electrically connected to the input terminal 2 of the terminal-side electro-optic bidirectional conversion analog optical transceiver. The output terminal 2 of the terminal-side electro-optic bidirectional conversion analog optical transceiver is connected to the input terminal 2 of the field-side electro-optic bidirectional conversion analog optical transceiver via optical fiber. The output terminal 2 of the field-side electro-optic bidirectional conversion analog optical transceiver is used to connect to actuator 1.

[0013] The communication type industrial fieldbus signal acquisition device is connected to the input terminal 1 of the field-side bidirectional optical transceiver. The output terminal 1 of the field-side bidirectional optical transceiver is connected to the input terminal 1 of the terminal-side bidirectional optical transceiver via optical fiber. The electrical signal of the output terminal 1 of the terminal-side bidirectional optical transceiver is connected to the electrical signal of the input terminal of the remote monitoring terminal. The output terminal of the remote monitoring terminal is connected to the electrical signal of the input terminal 2 of the terminal-side bidirectional optical transceiver. The output terminal 2 of the terminal-side bidirectional optical transceiver is connected to the input terminal 2 of the field-side bidirectional optical transceiver via optical fiber. The output terminal 2 of the field-side bidirectional optical transceiver is used to connect to actuator 1.

[0014] The aforementioned electro-optic signal bidirectional conversion device employs a combined optical transceiver, including at least one of an audio / video combined optical transceiver, a data combined optical transceiver, and a communication combined optical transceiver.

[0015] The audio / video signal acquisition device is a camera. The input terminal of the on-site audio / video two-way optical transceiver is connected to the camera via electrical signal. The on-site audio / video two-way optical transceiver and the terminal-side audio / video two-way optical transceiver are bidirectionally connected via optical fiber. The output terminal of the terminal-side audio / video two-way optical transceiver is connected to the input terminal of the remote monitoring terminal via electrical signal.

[0016] The control signal acquisition device includes at least one of a digital signal acquisition device and an analog signal acquisition device.

[0017] The switch signal acquisition device is connected to the input terminal 1 of the field-side electro-optical bidirectional conversion switch optical transceiver. The output terminal 1 of the field-side electro-optical bidirectional conversion switch optical transceiver is connected to the input terminal 1 of the terminal-side electro-optical bidirectional conversion switch optical transceiver via optical fiber. The output terminal 1 of the terminal-side electro-optical bidirectional conversion switch optical transceiver is connected to the input terminal of the remote monitoring terminal. The remote monitoring terminal processes the switch signal. The output terminal of the remote monitoring terminal is connected to the input terminal 2 of the terminal-side electro-optical bidirectional conversion switch optical transceiver. The output terminal 2 of the terminal-side electro-optical bidirectional conversion switch optical transceiver is connected to the input terminal 2 of the field-side electro-optical bidirectional conversion switch optical transceiver via optical fiber. The output terminal 2 of the field-side electro-optical bidirectional conversion switch optical transceiver is used to connect to actuator 1.

[0018] The analog signal acquisition device is electrically connected to the input terminal 1 of the field-side electro-optic bidirectional conversion analog optical transceiver. The output terminal 1 of the field-side electro-optic bidirectional conversion analog optical transceiver is connected to the input terminal 1 of the terminal-side electro-optic bidirectional conversion analog optical transceiver via optical fiber. The output terminal 1 of the terminal-side electro-optic bidirectional conversion analog optical transceiver is electrically connected to the input terminal of the remote monitoring terminal. The output terminal of the remote monitoring terminal is electrically connected to the input terminal 2 of the terminal-side electro-optic bidirectional conversion analog optical transceiver. The output terminal 2 of the terminal-side electro-optic bidirectional conversion analog optical transceiver is connected to the input terminal 2 of the field-side electro-optic bidirectional conversion analog optical transceiver via optical fiber. The output terminal 2 of the field-side electro-optic bidirectional conversion analog optical transceiver is used to connect to actuator 1.

[0019] The communication type industrial fieldbus signal acquisition device is connected to the input terminal 1 of the field-side bidirectional optical transceiver. The output terminal 1 of the field-side bidirectional optical transceiver is connected to the input terminal 1 of the terminal-side bidirectional optical transceiver via optical fiber. The electrical signal of the output terminal 1 of the terminal-side bidirectional optical transceiver is connected to the electrical signal of the input terminal of the remote monitoring terminal. The output terminal of the remote monitoring terminal is connected to the electrical signal of the input terminal 2 of the terminal-side bidirectional optical transceiver. The output terminal 2 of the terminal-side bidirectional optical transceiver is connected to the input terminal 2 of the field-side bidirectional optical transceiver via optical fiber. The output terminal 2 of the field-side bidirectional optical transceiver is used to connect to the actuator.

[0020] The switching signals include at least one of status signals and alarm signals; the analog signals include at least one of position signals, speed signals, environmental signals, and operating condition signals; and the communication type industrial fieldbus signals include at least one of network signals and positioning signals.

[0021] The main signal transmission line includes a field-side PLC located at the work site and a terminal-side PLC located at the monitoring terminal. The field-side PLC processes the acquired electrical signals, while the terminal-side PLC processes the electrical signals output from the field side and sends the processed results back to the field-side PLC or uploads them to the remote monitoring terminal. The remote monitoring terminal processes the signals and then sends instructions to the field-side PLC via the terminal-side PLC, which executes the commands. The output of the electrical signal acquisition device is electrically connected to the input of the field-side PLC. The field-side PLC and the terminal-side PLC communicate with each other. Through bidirectional digital communication, the terminal-side PLC and the remote monitoring terminal are connected in both directions. The field-side PLC processes the input electrical signals and then transmits them to the terminal-side PLC via digital communication. The terminal-side PLC further processes the signals and then sends them to the remote monitoring terminal. After processing by the remote monitoring terminal, the signals are then sent back to the terminal-side PLC. Commands are sent to the field-side PLC via digital communication. After processing by the field-side PLC, the commands are sent to the actuators located on the field side. The electrical signals collected by the signal acquisition device are simultaneously transmitted to the field PLC and the field-side electro-optical signal bidirectional conversion device.

[0022] The remote monitoring terminal is equipped with an information comparison and processing module and an alarm module. The information comparison and processing module compares the electrical signals transmitted by the field-side PLC and the field-side bidirectional optical transceiver. When the two are consistent, the actuator connected to the field-side PLC receives the command from the remote monitoring terminal. When the two are inconsistent, the alarm module issues an alarm. The signal of the field-side PLC or the field-side bidirectional optical transceiver that is confirmed to be erroneous is cut off, and the remote monitoring terminal issues a command to the field-side PLC or the field-side bidirectional optical transceiver that has an erroneous signal.

[0023] The aforementioned electrical signal acquisition device and on-site electro-optic signal bidirectional conversion device are installed on the port mobile equipment side, and the aforementioned remote monitoring terminal is installed on the terminal control side. The port mobile equipment includes at least one of quay cranes, yard cranes, and mobile belt conveyor equipment. The aforementioned remote monitoring terminal includes a central control system and an on-site monitoring system for monitoring the on-site situation. The input terminal of the on-site monitoring system is bidirectionally connected to the output terminal of the terminal-side PLC electrical signal and the output terminal of the on-site electro-optic signal bidirectional conversion device. The output terminal of the on-site monitoring system is bidirectionally connected to the remote monitoring terminal electrical signal. The central control system is at least one of a host computer and a cloud control system.

[0024] The optical fiber or optical cable is contained within the reel of the optical cable reel device, which is mounted on the port mobile equipment and moves synchronously with it to wind up and unwind the optical cable. Each field-side electro-optical bidirectional transceiver is connected to its corresponding terminal-side electro-optical bidirectional transceiver via optical fiber, and all optical fibers are contained within the same optical cable.

[0025] The advantages and beneficial effects of this utility model are as follows:

[0026] The multi-signal communication system for port mobile equipment using the structure of this utility model can transmit electrical signals collected on-site to a remote monitoring terminal. The remote monitoring terminal processes the collected electrical signals and transmits its instructions to the actuators on the field side. Alternatively, it can remotely monitor the working status on the field side. Furthermore, because the collected electrical signals are converted into optical signals by a bidirectional electro-optical signal converter located on the field side, and the optical signals are transmitted via optical fiber to a bidirectional electro-optical signal converter located on the terminal side, the terminal side's bidirectional electro-optical signal converter is restored to an electrical signal and sent to the remote monitoring terminal for processing, the processed electrical signal is transmitted back to the terminal side's bidirectional electro-optical signal converter to be converted back to an optical signal, and then the processed optical signal is transmitted via optical fiber to the on-site side's bidirectional electro-optical signal converter to be restored to an electrical signal and sent to the actuator on the field side, the signal transmission is fast, stable, and reliable. No auxiliary equipment is needed to prevent signal attenuation. Since optical fiber is much cheaper than cable, significant costs can be saved. Attached Figure Description

[0027] Figure 1 This is a schematic diagram illustrating the working principle of the multi-signal communication system for port mobile equipment according to this utility model. Detailed Implementation

[0028] The present invention will be further described in detail below through specific embodiments. The following embodiments are only descriptive and not limiting, and should not be used to limit the protection scope of the present invention.

[0029] For ease of explanation, we use "electro-optic" and "photoelectric" to represent the conversion direction between electrical and optical signals. Converting an electrical signal to an optical signal is called electro-optic, and converting an optical signal back to an electrical signal is called photoelectric. For example, an optical transceiver that converts an electrical signal to an optical signal is called an electro-optical transceiver, and an optical transceiver that converts an optical signal back to an electrical signal is called a photoelectric transceiver.

[0030] like Figure 1 As shown in the embodiment of this utility model, a multi-signal communication system for port mobile equipment includes an electrical signal acquisition device, a remote monitoring terminal for receiving and processing electrical signals transmitted by the electrical signal acquisition device, the remote monitoring terminal being located away from the electrical signal acquisition device, processing the electrical signals acquired by the electrical signal acquisition device and transmitting them to the central control and monitoring system, and a signal transmission verification line for verifying the signal on the main signal transmission line. In this invention, due to the special nature of port mobile equipment, it is necessary to ensure the safety and reliability of its signals. To prevent various faults during signal transmission, an additional signal transmission verification line is set up outside the main signal transmission line. The input ends of both the main signal transmission line and the signal transmission verification line are connected to the electrical signals of the electrical signal acquisition device, and the output ends are connected to the electrical signals of the remote monitoring terminal. The remote monitoring terminal compares the signals transmitted by the signal transmission verification line and the signal transmission main line. When the signals match, the remote monitoring terminal sends a command to the signal transmission main line. When the signals do not match, it confirms which line is transmitting correctly, cuts off the line transmitting the erroneous signal, and sends an instruction to the line transmitting the correct signal. The signal transmission verification line uses optical fiber transmission and is equipped with a bidirectional electro-optical signal conversion device that can convert electrical signals into optical signals and vice versa. This device includes a field-side electro-optical signal conversion device located on one side of the site and a terminal-side electro-optical signal conversion device located on the other side of the remote monitoring terminal. The input terminal of the field-side electro-optical signal conversion device is electrically connected to the electrical signal acquisition device. The field-side and terminal-side electro-optical signal conversion devices are bidirectionally connected via optical fiber or fiber optic cable. The output terminal of the terminal-side electro-optical signal conversion device is electrically connected to the remote monitoring terminal. Preferably, the electro-optical signal conversion device is a bidirectional optical transceiver. Alternatively, a combination of an electro-optical unidirectional optical transceiver that converts electrical signals into optical signals and an optoelectronic unidirectional optical transceiver that converts optical signals back into electrical signals can be used. For ease of description, the combination of the electro-optical unidirectional optical transceiver and the optoelectronic unidirectional optical transceiver will be referred to as a combined optical transceiver.

[0031] When the electro-optic signal bidirectional conversion device adopts a bidirectional optical transceiver that can convert electrical signals into optical signals and vice versa, the electrical signal acquisition device is connected to the input terminal 1 of the field-side bidirectional optical transceiver. The field-side bidirectional optical transceiver is bidirectionally connected to the terminal-side bidirectional optical transceiver via optical fiber. That is, the output terminal 1 of the field-side bidirectional optical transceiver is connected to the input terminal 1 of the terminal-side bidirectional optical transceiver via optical fiber, and the input terminal 2 of the field-side bidirectional optical transceiver is connected to the output terminal 2 of the terminal-side bidirectional optical transceiver via optical fiber. The electrical signal of the output terminal 1 of the terminal-side bidirectional optical transceiver is connected to the input terminal of the remote monitoring terminal. The output terminal of the remote monitoring terminal is connected to the input terminal 2 of the terminal-side bidirectional optical transceiver via electrical signal. The output terminal 2 of the field-side bidirectional optical transceiver is connected to the actuator 1 via electrical signal. When the electro-optic signal bidirectional conversion device adopts a combined optical transceiver, the output end of the electrical signal acquisition device is connected to the input end of the field-side electro-optic unidirectional optical transceiver. The output end of the field-side electro-optic unidirectional optical transceiver is connected to the input end of the terminal-side optoelectronic unidirectional optical transceiver via optical fiber. The output end of the terminal-side optoelectronic unidirectional optical transceiver is connected to the input end of the remote monitoring terminal. The output end of the remote monitoring terminal is connected to the input end of the terminal-side electro-optic unidirectional optical transceiver. The output end of the terminal-side electro-optic unidirectional optical transceiver is connected to the input end of the field-side optoelectronic unidirectional optical transceiver via optical fiber. The output end of the field-side optoelectronic unidirectional optical transceiver is connected to the actuator via an electrical signal. A combined optical transceiver essentially constitutes a bidirectional optical transceiver. The input terminal of the field-side electro-optical unidirectional optical transceiver is equivalent to input terminal one of the field-side bidirectional optical transceiver, and the output terminal is equivalent to output terminal one of the field-side bidirectional optical transceiver. Similarly, the input terminal of the field-side opto-optical unidirectional optical transceiver is equivalent to input terminal two of the field-side bidirectional optical transceiver, and the output terminal is equivalent to output terminal two of the field-side bidirectional optical transceiver. Likewise, the input terminal of the terminal-side electro-optical unidirectional optical transceiver is equivalent to input terminal one of the terminal-side bidirectional optical transceiver, and the output terminal is equivalent to output terminal one of the field-side bidirectional optical transceiver. Therefore, the combined optical transceiver is also referred to as a bidirectional optical transceiver.

[0032] Electrical signal acquisition devices include, but are not limited to, at least one of audio / video signal acquisition devices, control signal acquisition devices, and communication-type industrial fieldbus signal acquisition devices (hereinafter referred to as communication signal acquisition devices). Correspondingly, electro-optical signal bidirectional conversion devices include, but are not limited to, at least one of audio / video bidirectional optical transceivers, control signal bidirectional optical transceivers, and communication bidirectional optical transceivers. The audio / video signal acquisition device's electrical signal is connected to the input terminal one of the on-site audio / video bidirectional optical transceiver. The on-site audio / video bidirectional optical transceiver and the terminal-side audio / video bidirectional optical transceiver are bidirectionally connected via optical fiber. The output terminal two of the terminal-side audio / video bidirectional optical transceiver is connected to the input terminal of the remote monitoring terminal. The remote monitoring terminal processes the audio / video electrical signals and inputs the processed result to the input terminal two of the terminal-side audio / video bidirectional optical transceiver. The on-site audio / video bidirectional optical transceiver then converts the optical signal back into an electrical signal and transmits it to the actuator one located on-site via its output terminal two. Similarly, the control signal acquisition device's electrical signal is electrically connected to the input terminal one of the on-site control signal bidirectional optical transceiver. The on-site control signal bidirectional optical transceiver and the terminal-side control signal bidirectional optical transceiver are connected via optical fiber. The output terminal two of the terminal-side bidirectional optical transceiver is connected to the input terminal of the remote monitoring terminal. The output terminal of the remote monitoring terminal is connected to the input terminal two of the terminal-side control signal bidirectional optical transceiver. Output terminal 2 is electrically connected to actuator 1. After processing the electrical signal, the remote monitoring terminal generates instructions and sends them to actuator 1 via a control signal bidirectional optical transceiver. Actuator 1 executes the relevant commands. The electrical signal of the communication signal acquisition device is electrically connected to input terminal 1 of the field-side communication bidirectional optical transceiver. The field-side communication bidirectional optical transceiver and the terminal-side communication bidirectional optical transceiver are bidirectionally connected via optical fiber. Output terminal 2 of the terminal-side communication bidirectional optical transceiver is electrically connected to the input terminal of the remote monitoring terminal. Output terminal 2 of the field-side communication bidirectional optical transceiver is electrically connected to actuator 1. The field-side communication bidirectional optical transceiver converts the electrical signal acquired by the communication signal acquisition device into an optical signal and transmits it to the terminal-side communication bidirectional optical transceiver via optical fiber. The terminal-side communication bidirectional optical transceiver converts the optical signal back into an electrical signal and inputs it to the remote monitoring terminal. The remote monitoring terminal processes the signal and sends the processed result back to the terminal-side communication optical transceiver, which converts it back into an optical signal and sends it to the field-side communication bidirectional optical transceiver. The field-side communication bidirectional optical transceiver then converts the signal back into an electrical signal and sends it to actuator 1.

[0033] The electrical signal acquisition device and the field-side bidirectional optical transceiver are installed on the port mobile equipment side, while the terminal-side bidirectional optical transceiver is installed on the remote monitoring terminal side. The field-side bidirectional optical transceiver on the port mobile equipment side and the terminal-side bidirectional optical transceiver on the remote monitoring terminal side are connected by optical fiber, which runs through the entire signal transmission process. In this invention, the electrical signal acquired by the electrical signal acquisition device is directly sent to the field-side bidirectional optical transceiver, which converts the electrical signal into an optical signal and transmits it to the terminal-side bidirectional optical transceiver. After the optical signal is converted back into an electrical signal, it is analyzed and processed by the remote monitoring terminal. The signal is then converted back into an optical signal by the dual-control side bidirectional optical transceiver, and finally converted back into an electrical signal by the field-side bidirectional optical transceiver before being sent to actuator one. The entire system involves only the electrical signal acquisition device, optical transceiver, and remote monitoring terminal. The electrical signal acquired by the electrical signal acquisition device is directly processed by the remote monitoring terminal. Compared to setting up a PLC device, it eliminates the need for programming, configuration, communication protocol development, etc., making it simple, reliable, and with a very low failure rate. Furthermore, the system is not easily attacked by external forces, has high security, and is less prone to crashes. Furthermore, replacing cable transmission with fiber optic transmission offers numerous advantages. Fiber optics transmit data at the speed of light, providing extremely high speeds and immunity to electrical signal interference, resulting in exceptional signal stability, making it particularly suitable for long-distance, high-speed data transmission. Therefore, it offers advantages such as minimal signal attenuation during transmission, eliminating the need for signal boosting equipment, reduced labor during installation, easier deployment without programming development, improved system stability and security by avoiding software failures, and the ability to extend system functionality over long distances at high speed and efficiency, accelerating the intelligentization of port machinery at extremely low cost. Additionally, because optical transceivers and remote monitoring terminals support modular deployment and distributed expansion, the number and type of optical transceivers can be flexibly configured according to the business needs of different areas of the port, achieving comprehensive communication coverage of key nodes such as wharves, yards, and transportation channels. Simultaneously, the system is compatible with multiple industrial communication protocols, adapting to the future trend of port intelligence and automation, reducing overall system maintenance and operation costs, offering high flexibility, and allowing for unrestricted system expansion.

[0034] The remote monitoring terminal in this invention includes a host computer, a cloud processor, etc.

[0035] Audio / video signal acquisition devices typically employ cameras. Control signal acquisition devices preferably include switch signal acquisition devices and analog signal acquisition devices. Switch signal acquisition devices include, but are not limited to, status signal acquisition devices, such as switch status signal acquisition devices and mode signal acquisition devices. Analog signal acquisition devices include, but are not limited to, position signal acquisition devices, displacement signal acquisition devices, environmental signal acquisition devices, and operating condition signal acquisition devices. Position signal acquisition devices include, but are not limited to, angular displacement sensors and angle sensors; speed signal acquisition devices include, but are not limited to, speed sensors and linear speed sensors; environmental signal acquisition devices include, but are not limited to, wind speed sensors, temperature sensors, and concentration sensors; and operating condition signal acquisition devices include, but are not limited to, hydraulic sensors, level sensors, flow sensors, and vibration sensors. Communication signal acquisition devices include, but are not limited to, network signal acquisition devices such as RS485, CAN, Modbus, and other industrial protocol data acquisition devices, as well as positioning signal acquisition devices, such as GNSS positioning systems, UWB positioning systems, and RTK positioning systems. Each signal acquisition device is connected to a corresponding bidirectional optical terminal electromechanical signal on the field side. Each type of signal is transmitted using a single optical fiber, with multiple optical fibers converged and housed within the same optical cable. Example

[0036] This embodiment provides a multi-signal communication system suitable for port mobile equipment, deployed in the port terminal area, to achieve long-distance, high-reliability data communication between on-site loading and unloading equipment, on-site monitoring systems, and a central monitoring system. The on-site monitoring system monitors the situation on the field side. In the signal transmission verification line, optical transceivers are installed at corresponding locations according to different signal types: the on-site audio / video bidirectional optical transceivers are set at monitoring points of equipment such as quay cranes, yard cranes, and mobile belt conveyors, typically housed in electrical control cabinets at these locations. Electrical signals are connected to cameras to collect and transmit audio and video signals. The audio / video signal acquisition device mainly collects image and video signals from key points in critical operating areas of port mobile equipment, such as the bucket wheel material handling area of ​​the quay crane's spreader operation area, the ship loading hatch area of ​​the yard crane's travel area, and the central bucket unloading area of ​​the belt conveyor line. These signals are then transmitted to the corresponding on-site audio / video bidirectional optical transceivers. Actuator 1 mainly includes a loudspeaker and a two-way intercom. When a problem is detected on-site from the audio and video signals, the loudspeaker and two-way intercom will provide an alert. Switch signal acquisition devices such as switch signal acquisition units, mode signal acquisition units, over-temperature detection sensors, over-pressure sensors, fault alarms, and emergency stop signal sensors are installed on the hydraulic drive mechanism or cooling mechanism on the field side to collect the switching signals of the equipment operation. Two-way optical transceivers for switching signals are deployed near the control equipment of the quay crane, yard crane, and mobile belt conveyor equipment. Corresponding actuators 1 include solenoid valves and pumps, and are respectively installed on the pitch platform. Displacement sensors, angle sensors, speed sensors, linear speed sensors, wind speed sensors, temperature and humidity sensors, concentration sensors, hydraulic pressure signal sensors, liquid level signal sensors, flow signal sensors, and vibration signal sensors are respectively installed on the field-side equipment. Displacement and linear speed sensors are installed on the traveling mechanism, angle sensors on the rotation and pitch mechanisms, speed sensors on the rotation mechanism, and vibration sensors on the cantilever belt drive mechanism. Field-side analog two-way optical transceivers are respectively installed on the traveling trolley and the rotation platform. On the pitch platform, the corresponding actuators include a traveling frequency converter, a slewing frequency converter, a pitch hydraulic drive station, and a cantilever belt circuit breaker. The traveling frequency converter is located in the traveling electrical control cabinet, the slewing frequency converter in the slewing electrical control cabinet, the pitch hydraulic drive station on the pitch platform, and the cantilever belt circuit breaker in the belt conveyor electrical control cabinet. Data acquisition devices for industrial protocols such as RS485, CAN, and Modbus are located on the field operating mechanism. Positioning signal acquisition systems such as GNSS, UWB, and RTK are located on the pitch platform. A field-side bidirectional optical transceiver is also located on the pitch platform. Since the above lines only process data through the optical transceiver and only include hardware, for ease of description, they are referred to as signal transmission verification lines. The input terminals of different types of field-side bidirectional optical transceivers are all bidirectionally connected to the input terminals of the field monitoring system.The main signal transmission line includes a field-side PLC and a terminal-side PLC. The input terminal of the field-side PLC is unidirectionally connected to the electrical signal acquisition device. The terminal-side PLC is bidirectionally connected to the field-side PLC via digital communication. The output terminal of the terminal-side PLC is connected to the input terminal of the field monitoring system. The output terminal of the field monitoring system is bidirectionally connected to the input terminal of the remote monitoring terminal. The second output terminal of the field-side PLC is connected to the second actuator. The field-side PLC performs preliminary processing on the electrical signals acquired by the signal acquisition device, and the pre-processed signal is then uploaded to the terminal-side PLC. The terminal PLC aggregates and processes the received electrical signals, and the processed results are uploaded to the field monitoring system. The field monitoring system then processes the signals and transmits them to the central monitoring system. The central monitoring system compares the received signals with the signals transmitted through the signal transmission verification line and performs overall processing. If the two signals are inconsistent, a shutdown alarm is triggered, and on-site personnel confirm the issue, remove the faulty circuit, and temporarily rely on the normal line for operation. For example, if the signal transmission verification line is fault-free but the main signal transmission line is faulty, the signal transmission verification line sends a signal to field actuator one to stop the main signal transmission line for maintenance. If the signal transmission verification line is faulty but the main signal transmission line is not, the signal is sent to the terminal PLC of the main signal transmission line. The terminal PLC then distributes the signal to the field PLC, which in turn sends the signal to downstream actuator two to control its operation.

[0037] To meet the mobility requirements of port mobile equipment and prevent fiber optic cables from becoming entangled during the reciprocating movement of the equipment, it is best to configure a fiber optic cable reel device in the system. This device is installed on the port mobile equipment, with the fiber optic cable wound inside the reel. One end of each optical fiber connects to an electro-optical conversion transceiver at the mobile equipment's operating site, while the other end connects to a corresponding photoelectric conversion transceiver at the remote monitoring terminal. This process converts electrical signals to optical signals, transmits the optical signals, and then reverts them back to electrical signals before reaching the remote monitoring terminal. This enables rapid and secure remote monitoring, intelligent linkage, and data analysis. The optical fibers transmitting audio and video signals are located within the same fiber optic cable as those transmitting electrical signals.

[0038] This invention presents a high-reliability all-fiber communication system that enables unified fiber optic transmission of large volumes of information such as images and videos, as well as equipment control signals. While ensuring high reliability of control signals, it significantly reduces system costs and simplifies deployment. It features flexible deployment, strong anti-interference capabilities, and high adaptability, making it particularly suitable for building high-speed communication platforms for multi-source heterogeneous data in complex port operating environments. This provides fundamental communication support for information integration and automatic control in smart ports. The system employs a unified fiber optic channel structure: image and control signals share a single fiber optic channel, further improving resource utilization and reducing cabling complexity.

Claims

1. A multi-signal communication system for port mobile equipment, comprising an electrical signal acquisition device, a main signal transmission line, a signal transmission verification line, and a remote monitoring terminal, wherein the electrical signals acquired by the electrical signal acquisition device are simultaneously transmitted to the main signal transmission line and the signal transmission verification line, characterized in that: The signal transmission verification line includes a field-side electro-optical signal bidirectional conversion device, an optical fiber, and a terminal-side electro-optical signal bidirectional conversion device. The electrical signal acquisition device is connected to the input terminal of the field-side electro-optical signal bidirectional conversion device. The field-side electro-optical signal bidirectional conversion device and the terminal-side electro-optical signal bidirectional conversion device are bidirectionally connected via optical fiber. The terminal-side electro-optical signal bidirectional conversion device is bidirectionally connected to the remote monitoring terminal. The field-side electro-optical signal bidirectional conversion device converts the electrical signal into an optical signal, which is then transmitted to the terminal-side electro-optical signal bidirectional conversion device via optical fiber. The terminal-side electro-optical signal bidirectional conversion device converts the optical signal back into an electrical signal and transmits it to the remote monitoring terminal. The remote monitoring terminal processes the electrical signal and converts it back into an optical signal via the terminal-side electro-optical signal bidirectional conversion device, which then transmits it back to the field-side electro-optical signal bidirectional conversion device via optical fiber. The field-side electro-optical signal bidirectional conversion device converts the signal back into an electrical signal, which is then sent to actuator one.

2. A multi-signal communication system for mobile equipment in a port according to claim 1, characterized in that: The electro-optic signal bidirectional conversion device is a bidirectional optical transceiver that can convert electrical signals into optical signals and vice versa. The input terminal 1 of the field-side bidirectional optical transceiver is connected to the electrical signal acquisition device, and its output terminal 1 is connected to the input terminal 1 of the terminal-side bidirectional optical transceiver via optical fiber. The output terminal 1 of the terminal-side bidirectional optical transceiver is electrically connected to the input terminal of the remote monitoring terminal. The output terminal of the remote monitoring terminal is electrically connected to the input terminal 2 of the terminal-side bidirectional optical transceiver. The output terminal 2 of the terminal-side bidirectional optical transceiver is connected to the input terminal 2 of the field-side bidirectional optical transceiver via optical fiber. The output terminal 2 of the field-side bidirectional optical transceiver is used for electrical connection with actuator 1.

3. A multi-signal communication system for mobile equipment in a port according to claim 2, characterized in that: The electrical signal acquisition device includes at least one of an audio / video signal acquisition device, a control signal acquisition device, and a communication-type industrial fieldbus signal acquisition device. Correspondingly, the electro-optical signal bidirectional conversion device includes at least one of an audio / video bidirectional optical transceiver, a control signal bidirectional optical transceiver, and a communication bidirectional optical transceiver.

4. A multi-signal communication system for mobile equipment in a port according to claim 3, characterized in that: The aforementioned electro-optic signal bidirectional conversion device includes at least one of an audio / video bidirectional optical transceiver, a control signal bidirectional optical transceiver, and a communication bidirectional optical transceiver. The audio / video signal acquisition device is a camera. The input terminal of the on-site audio / video two-way optical transceiver is connected to the camera via electrical signal. The on-site audio / video two-way optical transceiver and the terminal-side audio / video two-way optical transceiver are bidirectionally connected via optical fiber. The output terminal of the terminal-side audio / video two-way optical transceiver is connected to the input terminal of the remote monitoring terminal via electrical signal. The control signal acquisition device includes at least one of a digital signal acquisition device and an analog signal acquisition device. The switch signal acquisition device is connected to the input terminal 1 of the field-side electro-optical bidirectional conversion switch optical transceiver. The output terminal 1 of the field-side electro-optical bidirectional conversion switch optical transceiver is connected to the input terminal 1 of the terminal-side electro-optical bidirectional conversion switch optical transceiver via optical fiber. The output terminal 1 of the terminal-side electro-optical bidirectional conversion switch optical transceiver is connected to the input terminal of the remote monitoring terminal. The remote monitoring terminal processes the switch signal. The output terminal of the remote monitoring terminal is connected to the input terminal 2 of the terminal-side electro-optical bidirectional conversion switch optical transceiver. The output terminal 2 of the terminal-side electro-optical bidirectional conversion switch optical transceiver is connected to the input terminal 2 of the field-side electro-optical bidirectional conversion switch optical transceiver via optical fiber. The output terminal 2 of the field-side electro-optical bidirectional conversion switch optical transceiver is used to connect to actuator 1. The analog signal acquisition device is electrically connected to the input terminal 1 of the field-side electro-optic bidirectional conversion analog optical transceiver. The output terminal 1 of the field-side electro-optic bidirectional conversion analog optical transceiver is connected to the input terminal 1 of the terminal-side electro-optic bidirectional conversion analog optical transceiver via optical fiber. The output terminal 1 of the terminal-side electro-optic bidirectional conversion analog optical transceiver is electrically connected to the input terminal of the remote monitoring terminal. The output terminal of the remote monitoring terminal is electrically connected to the input terminal 2 of the terminal-side electro-optic bidirectional conversion analog optical transceiver. The output terminal 2 of the terminal-side electro-optic bidirectional conversion analog optical transceiver is connected to the input terminal 2 of the field-side electro-optic bidirectional conversion analog optical transceiver via optical fiber. The output terminal 2 of the field-side electro-optic bidirectional conversion analog optical transceiver is used to connect to actuator 1. The communication type industrial fieldbus signal acquisition device is connected to the input terminal 1 of the field-side bidirectional optical transceiver. The output terminal 1 of the field-side bidirectional optical transceiver is connected to the input terminal 1 of the terminal-side bidirectional optical transceiver via optical fiber. The electrical signal of the output terminal 1 of the terminal-side bidirectional optical transceiver is connected to the electrical signal of the input terminal of the remote monitoring terminal. The output terminal of the remote monitoring terminal is connected to the electrical signal of the input terminal 2 of the terminal-side bidirectional optical transceiver. The output terminal 2 of the terminal-side bidirectional optical transceiver is connected to the input terminal 2 of the field-side bidirectional optical transceiver via optical fiber. The output terminal 2 of the field-side bidirectional optical transceiver is used to connect to actuator 1.

5. A multi-signal communication system for mobile equipment in a port according to claim 3, characterized in that: The aforementioned electro-optic signal bidirectional conversion device employs a combined optical transceiver, including at least one of an audio / video combined optical transceiver, a data combined optical transceiver, and a communication combined optical transceiver. The audio / video signal acquisition device is a camera. The input terminal of the on-site audio / video two-way optical transceiver is connected to the camera via electrical signal. The on-site audio / video two-way optical transceiver and the terminal-side audio / video two-way optical transceiver are bidirectionally connected via optical fiber. The output terminal of the terminal-side audio / video two-way optical transceiver is connected to the input terminal of the remote monitoring terminal via electrical signal. The control signal acquisition device includes at least one of a digital signal acquisition device and an analog signal acquisition device. The switch signal acquisition device is connected to the input terminal 1 of the field-side electro-optical bidirectional conversion switch optical transceiver. The output terminal 1 of the field-side electro-optical bidirectional conversion switch optical transceiver is connected to the input terminal 1 of the terminal-side electro-optical bidirectional conversion switch optical transceiver via optical fiber. The output terminal 1 of the terminal-side electro-optical bidirectional conversion switch optical transceiver is connected to the input terminal of the remote monitoring terminal. The remote monitoring terminal processes the switch signal. The output terminal of the remote monitoring terminal is connected to the input terminal 2 of the terminal-side electro-optical bidirectional conversion switch optical transceiver. The output terminal 2 of the terminal-side electro-optical bidirectional conversion switch optical transceiver is connected to the input terminal 2 of the field-side electro-optical bidirectional conversion switch optical transceiver via optical fiber. The output terminal 2 of the field-side electro-optical bidirectional conversion switch optical transceiver is used to connect to actuator 1. The analog signal acquisition device is electrically connected to the input terminal 1 of the field-side electro-optic bidirectional conversion analog optical transceiver. The output terminal 1 of the field-side electro-optic bidirectional conversion analog optical transceiver is connected to the input terminal 1 of the terminal-side electro-optic bidirectional conversion analog optical transceiver via optical fiber. The output terminal 1 of the terminal-side electro-optic bidirectional conversion analog optical transceiver is electrically connected to the input terminal of the remote monitoring terminal. The output terminal of the remote monitoring terminal is electrically connected to the input terminal 2 of the terminal-side electro-optic bidirectional conversion analog optical transceiver. The output terminal 2 of the terminal-side electro-optic bidirectional conversion analog optical transceiver is connected to the input terminal 2 of the field-side electro-optic bidirectional conversion analog optical transceiver via optical fiber. The output terminal 2 of the field-side electro-optic bidirectional conversion analog optical transceiver is used to connect to actuator 1. The communication type industrial fieldbus signal acquisition device is connected to the input terminal 1 of the field-side bidirectional optical transceiver. The output terminal 1 of the field-side bidirectional optical transceiver is connected to the input terminal 1 of the terminal-side bidirectional optical transceiver via optical fiber. The electrical signal of the output terminal 1 of the terminal-side bidirectional optical transceiver is connected to the electrical signal of the input terminal of the remote monitoring terminal. The output terminal of the remote monitoring terminal is connected to the electrical signal of the input terminal 2 of the terminal-side bidirectional optical transceiver. The output terminal 2 of the terminal-side bidirectional optical transceiver is connected to the input terminal 2 of the field-side bidirectional optical transceiver via optical fiber. The output terminal 2 of the field-side bidirectional optical transceiver is used to connect to the actuator.

6. A multi-signal communication system for port mobile equipment as described in claim 4, characterized in that: The switching signals include at least one of status signals and alarm signals; the analog signals include at least one of position signals, speed signals, environmental signals, and operating condition signals; and the communication type industrial fieldbus signals include at least one of network signals and positioning signals.

7. A multi-signal communication system for mobile equipment in a port according to claim 1, characterized in that: The main signal transmission line includes a field-side PLC located at the work site and a terminal-side PLC located at the monitoring terminal. The field-side PLC processes the acquired electrical signals, while the terminal-side PLC processes the electrical signals output from the field side and sends the processed results back to the field-side PLC or uploads them to the remote monitoring terminal. The remote monitoring terminal processes the signals and then sends instructions to the field-side PLC via the terminal-side PLC, which executes the commands. The output of the electrical signal acquisition device is electrically connected to the input of the field-side PLC. The field-side PLC and the terminal-side PLC communicate with each other. Through bidirectional digital communication, the terminal-side PLC and the remote monitoring terminal are connected in both directions. The field-side PLC processes the input electrical signals and then transmits them to the terminal-side PLC via digital communication. The terminal-side PLC further processes the signals and then sends them to the remote monitoring terminal. After processing by the remote monitoring terminal, the signals are then sent back to the terminal-side PLC. Commands are sent to the field-side PLC via digital communication. After processing by the field-side PLC, the commands are sent to the actuators located on the field side. The electrical signals collected by the signal acquisition device are simultaneously transmitted to the field PLC and the field-side electro-optical signal bidirectional conversion device.

8. A multi-signal communication system for mobile equipment in a port according to claim 7, characterized in that: The remote monitoring terminal is equipped with an information comparison and processing module and an alarm module. The information comparison and processing module compares the electrical signals transmitted by the field-side PLC and the field-side bidirectional optical transceiver. When the two are consistent, the actuator connected to the field-side PLC receives the command from the remote monitoring terminal. When the two are inconsistent, the alarm module issues an alarm. The signal of the field-side PLC or the field-side bidirectional optical transceiver that is confirmed to be erroneous is cut off, and the remote monitoring terminal issues a command to the field-side PLC or the field-side bidirectional optical transceiver that has an erroneous signal.

9. A multi-signal communication system for mobile equipment in a port according to claim 1, characterized in that: The aforementioned electrical signal acquisition device and on-site electro-optical signal bidirectional conversion device are installed on the port mobile equipment side, and the aforementioned remote monitoring terminal is installed on the terminal control side. The port mobile equipment includes at least one of quay cranes, yard cranes, and mobile belt conveyor equipment. The aforementioned remote monitoring terminal includes a central control system and an on-site monitoring system for monitoring the on-site situation. The input terminal of the on-site monitoring system is bidirectionally connected to the output terminal of the terminal-side PLC electrical signal and the output terminal of the terminal-side electro-optical signal bidirectional conversion device, respectively. The output terminal of the on-site monitoring system is bidirectionally connected to the remote monitoring terminal electrical signal. The central control system is at least one of a host computer and a cloud control system.

10. A multi-signal communication system for mobile equipment in a port according to claim 2, characterized in that: The optical fiber or optical cable is contained within the reel of the optical cable reel device, which is mounted on the port mobile equipment and moves synchronously with it to wind up and unwind the optical cable. Each field-side electro-optical bidirectional transceiver is connected to its corresponding terminal-side electro-optical bidirectional transceiver via optical fiber, and all optical fibers are contained within the same optical cable.

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