A DCS electronic room multi-point remote communication system

Abstract

This utility model provides a multi-point remote communication system for a DCS electronics room, relating to the field of multi-point remote communication. It includes a central control unit and a transceiver signal processor. Through a combination of wired and wireless methods, specifically connecting the inside of the DCS electronics room to the outside world via an optical fiber composite cable, and incorporating nRF9E5-2 wireless radio frequency technology, it enables communication between remote multi-point field devices during power generation in a power plant. This results in more flexible and efficient data transmission, lower wiring costs, and adaptability to harsh environments such as high temperatures and dust in power plants, making the production process safer and more reliable.

Description

Technical Field

[0001] This utility model belongs to the field of communications, specifically relating to a DCS electronic intercom multi-point remote communication system. Background Technology

[0002] The statements in this section are merely background information related to this utility model and do not necessarily constitute prior art.

[0003] In power plants, due to the harsh working environment, high temperature and dust, a dedicated DCS system electronics room is required to ensure that electronic equipment is protected from the effects of on-site temperature and other factors. The DCS electronics room enables multi-point real-time remote communication with on-site equipment.

[0004] In existing technologies, communication between the electronic room side and the field side is usually established by using a fiber optic composite cable to connect the electronic room side and the field side. However, this method is not suitable for power plants. Not only is the wiring cost relatively high and the flexibility is lacking, but it also poses a high safety hazard. Therefore, there is an urgent need for a more flexible and secure multi-point remote communication system for electronic rooms. Utility Model Content

[0005] To address the aforementioned problems, this invention proposes a DCS electronic room multi-point remote communication system. It employs a combination of wired and wireless methods to achieve remote communication between various field devices. The information data transmission is efficient, stable, secure, and reliable, and can adapt to harsh environments such as power plant environments with high temperatures and high dust levels.

[0006] One objective of this utility model is to provide a DCS electronic room multi-point remote communication system, including: a central control unit, a transceiver signal processor, and a communication B unit;

[0007] The central control unit is located in the electronics room and is connected to the transceiver signal processor via an optical fiber composite cable. The transceiver signal processor includes a sub-control unit and a communication unit A. The sub-control unit is connected to the communication unit A via a serial port, and the communication unit A is connected to the communication unit B.

[0008] Communication Unit B is located at one or more locations on each field device terminal. It is used to collect device data and transmit the device data to Communication Unit A. Communication Unit A transmits the device data to the central control unit via the sub-control unit and the optical fiber composite cable.

[0009] Furthermore, both communication unit A and communication unit B use the nRF9E5-2 communication chip and are connected via the nRF9E5-2 communication chip.

[0010] Furthermore, each field device terminal is equipped with multiple field device communication terminals, which correspond one-to-one with communication unit B and are connected to communication unit B.

[0011] Furthermore, the field device communication terminal includes at least: temperature sensor, pressure sensor, gas concentration sensor, voltage sensor, current sensor, displacement sensor, and vibration sensor.

[0012] Furthermore, the power module is connected to the central control unit in the electronics room, and then connected to the transceiver signal processor via an optoelectronic composite cable to provide power.

[0013] Furthermore, the plurality of field device terminals include at least: boiler, steam turbine, and condenser.

[0014] The beneficial effects of this utility model are as follows:

[0015] This invention provides a DCS electronics room multi-point remote communication system that combines wired and wireless methods. Specifically, it connects the inside of the DCS electronics room to the outside world and extends to the vicinity of the production site via an optoelectronic composite cable, and combines it with nRF9E5-2 wireless radio frequency technology. This enables communication between multiple remote field devices, making information data transmission more flexible and efficient, reducing wiring costs, and adapting to harsh environments such as power plants with high temperatures and dust, thus making the power generation process safer and more reliable. Attached Figure Description

[0016] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0017] Figure 1 This is a diagram of a multi-point remote communication system for a DCS electronic room, as described in this utility model.

[0018] Figure 2 This is a schematic diagram of the structure of communication unit A and communication unit B of this utility model. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0021] Example 1

[0022] In the power plant sector, due to the harsh working environment, high temperature, and high dust levels, a dedicated DCS system electronics room is required to ensure that electronic equipment is protected from factors such as on-site temperature. The DCS electronics room enables multi-point real-time remote communication with on-site equipment. This embodiment provides a system that combines wired and wireless methods to achieve multi-point remote communication, thereby solving the aforementioned technical problems.

[0023] Reference Figure 1 As one embodiment of this utility model, a system for realizing multi-point remote communication in a combination of wired and wireless means is provided, including: a central control unit, a transceiver signal processor, multiple field device communication terminals, a communication B unit, and a power module;

[0024] The central control unit is located in the electronics room and is connected to the transceiver signal processor via a fiber optic composite cable. Further explanation is needed: the central control unit, located in the electronics room, is tightly connected to the transceiver signal processor via a stable and efficient fiber optic composite cable. The transceiver signal processor includes a sub-control unit and a communication unit A. The sub-control unit is used to transmit instructions from the central control unit and to receive field device data from the communication unit A in a timely manner. Specifically, the sub-control unit receives raw signal input from the central control unit through the GPIO interface and then outputs its raw signal through the serial peripheral interface to transmit information to the communication unit A, while simultaneously receiving field data from the communication unit A.

[0025] Finally, communication unit A and communication unit B are tightly connected to ensure smooth and accurate information transmission. Communication unit B is set at one or more key locations on each field device terminal. As a feasible solution, communication unit B is set on the side of the boiler and turbine and connected to the sensors installed inside them, which facilitates regular inspection by personnel and greatly improves the adaptability and flexibility of the system. In addition, the power supply module is connected to each module to provide power.

[0026] In this embodiment, the central control unit is used to manage and control the entire communication system, receive and process data from various remote communication terminals (field device communication terminals), and send control commands to the remote communication terminals. The central control unit is located in the DCS electronics room. One end of the optoelectronic composite cable is connected to the central control unit, and the other end is connected to the sub-control unit of the transceiver signal processor outside the DCS electronics room. The sub-control unit then establishes a communication connection with communication unit A. Data signals are transmitted through the optoelectronic composite cable to the sub-control unit of the transceiver signal processor outside the DCS electronics room, and then transmitted by the sub-control unit to communication unit A. Simultaneously, it receives communication commands from communication unit A. The unit provides field device data and transmits it to the central control unit inside the DCS electronics room. It should be noted that the central control unit uses a dual-core A7+M4 core, model STM32MP157 MPU. The sub-control unit of the transceiver signal processor also uses an STM32MP157 MPU. Both the central control unit and the sub-control unit of the transceiver signal processor are existing technologies. Their control strategies are as follows: 1. Allocate resources and adjust tasks according to preset strategies; 2. Use parallel processing to distribute some tasks that can be performed simultaneously to the two cores for simultaneous execution.

[0027] As mentioned above, multiple field device terminals include at least: boilers, steam turbines, and condensers.

[0028] Among them, the steam turbine is a key component of the power plant, and the accurate collection and timely transmission of its operating data is crucial. Temperature sensors, pressure sensors and gas concentration sensors are installed inside the steam turbine. The communication B unit connects to these sensors and transmits the sensor data to the central control unit, which can monitor the temperature, pressure changes and gas composition inside the steam turbine in real time, ensuring the safe and stable operation of the converter.

[0029] During the high-temperature combustion process, the boiler is equipped with current and voltage sensors to accurately control the combustion process. The communication unit B is connected to the current and voltage sensors and can monitor key parameters such as temperature and power in real time.

[0030] Displacement sensors and vibration sensors are also installed on the steam turbine. The communication B unit is connected to the displacement sensors and vibration sensors, and the steam turbine's operating status data can be accurately controlled using the communication B unit.

[0031] The turbine is also equipped with a thickness sensor and a tension sensor. The communication unit B is connected to the thickness sensor and the tension sensor, which can quickly provide feedback on turbine parameters such as pressure and speed, enabling precise control of the power generation process.

[0032] As an important implementation method, both communication unit A and communication unit B use the nRF9E5-2 communication chip. It should be noted that the nRF9E5-2 used in this embodiment belongs to the nRF9E5 series of radio frequency chips. It is a system-level wireless radio frequency transceiver chip launched by Nordic Corporation. Since power plants have high requirements for transmission distance, and the nRF9E5-2 mainly operates in the 433, 868, and 915MHz ISM bands, it has an embedded high-performance 8051 MCU and a 4-channel 10-bit ADC, which can be used for remote multi-point communication in the power plant environment and between electronics, and can further reduce current consumption and system cost.

[0033] Reference Figure 2 In this embodiment, communication unit A and communication unit B include an nRF9E5-2 communication chip and a CH32F103 microcontroller. In addition, communication unit A is also equipped with a convenient communication device. The convenient communication device is connected to the CH32F103 microcontroller for communication. Communication data is output through TXD, and communication data is input to the CH32F103 microcontroller through RXD. Communication unit A is also equipped with GDN as the ground line.

[0034] As one implementation method, the convenient communication device includes a serial communication interface and an intelligent flow monitoring unit. The serial communication interface is used to quickly and easily transmit various types of data with external devices. The intelligent flow monitoring unit adopts the WEBTEC WPR series online flow transmitter, which monitors the data transmission rate in real time according to the receiver's processing capacity and the current network conditions to prevent data congestion and loss.

[0035] In one implementation, the CH32F103 microcontroller and the nRF9E5-2 communication chip are connected through a serial peripheral interface. The CH32F103 microcontroller controls the receiving or transmitting mode of the nRF9E5-2 communication chip to realize the data transmission or communication function. The nRF9E5-2 chip operates in the ISM band of 433, 868, and 915 MHz to meet the needs of multi-point communication, with an operating rate of 0 ~ 120 kbps / s.

[0036] In this embodiment, the power module has an input voltage of AC 220V and an output voltage including DC 5V, 12V, and 24V, which provide a stable power supply for the central control unit and its sub-control units located in the transceiver signal processor, as well as field equipment communication terminals. In this embodiment, the power module uses Mean Well's LRS-50-12, which has overvoltage protection, overcurrent protection, and short circuit protection functions to ensure the safe operation of the system.

[0037] This invention provides a method that combines wired and wireless connections, specifically by using a fiber optic composite cable to connect the inside of the DCS electronics room to the outside world and extend it to the vicinity of the production site. Combined with nRF9E5-2 wireless radio frequency technology, it enables communication between multiple remote field devices. This results in more flexible and efficient data transmission, lower wiring costs, and adaptability to harsh environments such as power plants with high temperatures and dust, making it safer and more reliable.

[0038] The above provides a detailed description of a DCS electronic inter-system multi-point remote communication system. While specific embodiments of the present invention have been described in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. It should be noted that the embodiments in the specification are described in a progressive manner. For those skilled in the art, several improvements and modifications can be made to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A DCS (Distributed Control System) multi-point remote communication system, characterized in that, include: Central control unit, transceiver signal processor and communication B unit; The central control unit is located in the electronics room and is connected to the transceiver signal processor via an optical fiber composite cable. The transceiver signal processor includes a sub-control unit and a communication unit A. The sub-control unit is connected to the communication unit A via a serial port, and the communication unit A is connected to the communication unit B. Both the communication unit A and the communication unit B use the nRF9E5-2 communication chip. Communication Unit B is located at one or more locations on each field device terminal. It is used to collect device data and transmit the device data to Communication Unit A. Communication Unit A then transmits the device data to the central control unit via the sub-control unit and the optical fiber composite cable.

2. The DCS electronic intercom multi-point remote communication system as described in claim 1, characterized in that, The central control unit is located in the electronics room and is connected to the transceiver signal processor via an optoelectronic composite cable. Specifically, it includes: One end of the sub-control unit is connected to the central control unit via an optical fiber composite cable, and the other end is connected to the communication unit A via a serial port.

3. The DCS electronic intercom multi-point remote communication system as described in claim 1, characterized in that: Both the central control unit and the sub-control units of the transceiver signal processor adopt a dual-core A7+M4 core, and the model is STM32MP157 MPU.

4. The DCS electronic intercom multi-point remote communication system as described in claim 1, characterized in that: The communication unit A and communication unit B are also equipped with a CH32F103 microcontroller, which establishes a connection with the nRF9E5-2 communication chip through a serial peripheral interface.

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