Serial communication conversion device of underwater Christmas tree and underwater Christmas tree
By designing a processor unit for a serial communication conversion device and multiple isolated communication units, the problem of poor communication reliability between the underwater wellhead safety controller and external equipment was solved, achieving reliable communication between the safety controller and external equipment and ensuring the safety of underwater wellhead operations.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- THE 711TH RES INST OF CHINA STATE SHIPBUILDING CORP
- Filing Date
- 2026-01-23
- Publication Date
- 2026-05-05
AI Technical Summary
The communication reliability between the safety controller of the subsea production tree and external equipment is poor, making it difficult to guarantee operational safety.
A serial communication conversion device is adopted, which converts the data protocol format through the processor unit and uses multiple isolated communication units to form a complete communication link to ensure the reliability of communication between the safety controller and external devices.
It improves the operational safety of underwater production trees, and ensures the stability and reliability of communication links through redundant communication design, avoiding the impact of a single communication unit failure on overall communication.
Smart Images
Figure CN121984733A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of marine oil and gas development technology, and in particular to a serial communication conversion device for a subsea production tree and a subsea production tree. Background Technology
[0002] Subsea wellheads are core equipment in offshore oil and gas development, used to control the transfer of oil and gas between the wellhead and external equipment. The safety controller of the subsea wellhead provides safety protection for the equipment during external equipment startup, shutdown, process disturbances, and normal maintenance operations. In the event of a hazard to the external equipment, the safety controller can react immediately and output the correct signal, bringing the external equipment to a safe state or shutting it down. Because the data protocols of the safety controller and the external equipment are different, a serial communication converter is required to convert the data when the safety controller communicates with the external equipment.
[0003] In related technologies, because subsea production trees operate in an underwater environment with complex working conditions, the reliability of communication between the safety controller and external equipment is poor, making it difficult to guarantee the operational safety of subsea production trees. Summary of the Invention
[0004] This application provides a serial communication conversion device for a subsea production tree and a subsea production tree to solve the problem of poor reliability in communication between the safety controller and external devices, which makes it difficult to ensure the operational safety of the subsea production tree.
[0005] In a first aspect, embodiments of this application provide a serial communication conversion device for a subsea production tree, wherein the serial communication conversion device is communicatively connected to external devices and the safety controller of the subsea production tree. The serial communication conversion device includes: The processor unit is used to convert between first data and second data. The first data is used for communication with the safety controller of the subsea production tree, and the second data is used for communication with external devices. The first communication unit is communicatively connected to the processor unit and is also used to communicate with the security controller. The first communication unit is used to transmit first data between the security controller and the processor unit. Multiple mutually isolated second communication units, each second communication unit is communicatively connected to the processor unit, and each second communication unit is also used to communicate with external devices. The second communication units are used to transmit second data between the external devices and the processor unit.
[0006] In some embodiments, there are multiple first communication units, and the multiple first communication units are isolated from each other; The processor unit includes multiple first communication interfaces, and each first communication unit is communicatively connected to one of the first communication interfaces.
[0007] In some embodiments, the first communication unit includes: A first communication transceiver is connected to a first communication interface. The first interface isolation module is connected to the first communication transceiver and is also used to communicate with the security controller.
[0008] In some embodiments, the processor unit includes a plurality of second communication interfaces, and each second communication unit is communicatively connected to one of the second communication interfaces.
[0009] In some embodiments, the second communication unit includes: Optical isolator, which is connected to the second communication interface; The second communication transceiver is communicatively connected to the optocoupler isolator. The second interface isolation module is connected to the second communication transceiver and is also used to communicate with external devices.
[0010] In some embodiments, the processor unit includes a third communication interface; The serial communication conversion device also includes a pressure monitoring unit, which includes: Pressure sensor, used to detect pressure and output analog signal; The voltage follower communicates with the pressure sensor and a third communication interface. The voltage follower is used to send analog signals to the processor unit.
[0011] In some embodiments, the processor unit includes a fourth communication interface; The serial communication conversion device also includes a network communication unit, which includes: The network chip communicates with the fourth communication interface; Network port transformer, which is electrically connected to the network chip; The network interface is electrically connected to the network port transformer.
[0012] In some embodiments, the serial communication conversion device further includes a power supply unit, which includes: A first voltage converter is used to convert a first voltage into multiple mutually isolated second voltages to provide power to a first communication unit and a second communication unit.
[0013] In some embodiments, the power supply unit further includes: A second voltage converter is used to convert a second voltage into a third voltage; The power monitoring module is electrically connected to the second voltage converter. The power monitoring module is used to monitor the third voltage and perform a logic reset when the third voltage is lower than a preset voltage threshold so that the third voltage can be restored.
[0014] In some embodiments, the serial communication conversion device further includes a display unit for displaying the operating status of the serial communication conversion device.
[0015] In some embodiments, the serial communication conversion device further includes a storage expansion unit, which is communicatively connected to the processor unit and is used to store data.
[0016] Secondly, embodiments of this application also provide a subsea production tree, which includes: Safety controller; The serial communication conversion device in the first aspect is connected to the safety controller for communication, and is also used for communication with external devices.
[0017] This application utilizes multiple isolated second communication units, where a failure of one second communication unit does not affect the operation of the others. Combined with the processor unit and the first communication unit, a complete communication link is formed, ensuring the reliability of communication between the safety controller and external devices, and further guaranteeing the operational safety of the underwater production tree. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.
[0020] Figure 1 This is a schematic diagram of a serial communication conversion device provided as an exemplary embodiment of the present disclosure.
[0021] Figure 2 This is another schematic diagram of a serial communication conversion device provided as an exemplary embodiment of the present disclosure.
[0022] Figure 3A schematic diagram of the structure of a processor unit of a serial communication conversion device provided in an exemplary embodiment of this disclosure; Figure 4 A schematic diagram of the structure of the first communication unit of a serial communication conversion device provided in an exemplary embodiment of this disclosure; Figure 5 A schematic diagram of the structure of the second communication unit of a serial communication conversion device provided in an exemplary embodiment of this disclosure; Figure 6 A schematic diagram of the structure of a pressure monitoring unit of a serial communication conversion device provided in an exemplary embodiment of this disclosure; Figure 7 A schematic diagram of the network communication unit of a serial communication conversion device provided in an exemplary embodiment of this disclosure; Figure 8 A schematic diagram of the power supply unit of a serial communication conversion device provided in an exemplary embodiment of this disclosure; Figure 9 A schematic diagram of the structure of a storage expansion unit of a serial communication conversion device provided in an exemplary embodiment of this disclosure; Figure 10 A schematic diagram of the dimensions of a serial communication conversion device provided as an exemplary embodiment of this disclosure; Figure 11 A schematic diagram of the front side of a serial communication conversion device provided in an exemplary embodiment of this disclosure; Figure 12 A schematic diagram of the back of a serial communication conversion device provided in an exemplary embodiment of this disclosure; Figure 13 A simulation diagram of a serial communication conversion device provided as an exemplary embodiment of this disclosure; Figure 14 A schematic diagram of the structure of an underwater production tree provided as an exemplary embodiment of this disclosure; Figure 15 This is a schematic diagram of the structure of a safety controller for an underwater wellhead provided as an exemplary embodiment of this disclosure.
[0023] Explanation of icon numbers: 100. Serial communication conversion device; 101. Processor unit; 1011. First communication interface; 1012. Second communication interface; 1013. Third communication interface; 1014. Fourth communication interface; 1015. Fifth communication interface; 1016. Sixth communication interface; 1017. First parsing module; 1018. Second parsing module; 1019. Third parsing module; 10110. Fourth parsing module; 10111. Display control module; 10112. Network processing module; 10113. Data conversion module; 10114. Information recognition module; 10115. Resource self-testing module; 10116. Security module; 102. First communication unit; 1021. First communication transceiver; 1022. First interface isolation module; 103. Second communication unit; 1031, Optical Isolator; 1032, Second Communication Transceiver; 1033, Second Interface Isolation Module; 104, Pressure Monitoring Unit; 1041, Pressure Sensor; 1042, Voltage Follower; 105, Network Communication Unit; 1051, Network Chip; 1052, Network Transformer; 1053, Network Interface; 106, Power Supply Unit; 1061, First Voltage Converter; 1062, Second Voltage Converter; 1063, Power Supply Monitoring Module; 107, Display Unit; 108, Storage Expansion Unit; 200, Safety Controller; 201, Communication Bus; 202, Main Control Module; 203, Analog Input Module; 204, Digital Input Module; 205, Digital Output Module; 206, Communication Module; 300, External Devices. Detailed Implementation
[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.
[0025] In the embodiments of this application, "at least one" refers to one or more; "multiple" refers to two or more. In the description of this application, the terms "first," "second," "third," etc., are used only for the purpose of distinguishing descriptions and should not be construed as indicating or implying relative importance, nor should they be construed as indicating or implying order.
[0026] References such as “one embodiment” or “some embodiments” as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the terms “comprising,” “including,” “having,” and variations thereof, as used in this specification, mean “including, but not limited to,” unless otherwise specifically emphasized.
[0027] It should be noted that in the embodiments of this application, "and / or" describes the relationship between associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. In addition, the character " / ", unless otherwise specified, generally indicates that the associated objects before and after it are in an "or" relationship.
[0028] It should be noted that in the embodiments of this application, "connection" can be understood as electrical connection. The connection between two electrical components can be a direct or indirect connection between the two electrical components. For example, the connection between A and B can be a direct connection between A and B, or an indirect connection between A and B through one or more other electrical components.
[0029] In a first aspect, embodiments of this application provide a serial communication conversion device 100 for a subsea production tree, such as... Figure 1 As shown.
[0030] The serial communication converter 100 is connected to the external device 300 and the safety controller 200 of the subsea wellhead. The serial communication device is used for data transmission between the safety controller 200 and the external device 300 so that the safety controller 200 can provide safety protection for the external device 300.
[0031] The serial communication conversion device 100 includes a processor unit 101, a first communication unit 102, and a second communication unit 103.
[0032] Processor unit 101 is used to convert between first data and second data. The first data is used for communication between the safety controller 200 of the subsea production tree and the second data is used for communication between the external device 300. The safety controller 200 sends control commands to the external device 300 and receives status data fed back by the external device 300 through the first data. The external device 300 identifies and executes the control commands through the second data and collects status data to feed back to the safety controller 200. Since the protocol formats of the first data and the second data are different, the processor unit 101 converts the protocol formats of the first data and the second data to realize communication between the safety controller 200 and the external device 300.
[0033] A first communication unit 102 is communicatively connected to a processor unit 101 and is also communicatively connected to a security controller 200. The first communication unit 102 is used to transmit first data between the security controller 200 and the processor unit 101. The security controller 200 sends or receives the first data to the processor unit 101 through the first communication unit 102.
[0034] Multiple isolated second communication units 103 are provided. Each second communication unit 103 is communicatively connected to the processor unit 101 and also communicates with an external device 300. The second communication units 103 are used to transmit second data between the external device 300 and the processor unit 101. The external device 300 sends or receives second data to the processor unit 101 through the second communication units 103. Since the multiple second communication units 103 are isolated from each other, a failure of one second communication unit 103 does not affect the operation of the other second communication units 103, thereby ensuring the reliability of communication between the safety controller 200 and the external device 300.
[0035] The first communication unit 102, the processor unit 101, and the second communication unit 103 constitute a complete communication link between the security controller 200 and the external device 300. When the security controller 200 sends control commands to the external device 300, it sends first data to the processor unit 101 via the first communication unit 102. The processor unit 101 converts the first data into second data and then sends the second data to the external device 300 via the second communication unit 103. The external device 300 receives the second data and executes the control commands from the security controller 200. When the external device 300 feeds back status data to the security controller 200, it sends the second data to the processor unit 101 via the second communication unit 103. The processor unit 101 converts the second data into first data and then sends the first data to the security controller 200 via the first communication unit 102.
[0036] This application uses multiple isolated second communication units 103, where the failure of one second communication unit 103 does not affect the operation of the other second communication units 103. Combined with the processor unit 101 and the first communication unit 102, a complete communication link is formed, ensuring the reliability of communication between the safety controller 200 and the external device 300, and further ensuring the operational safety of the underwater production tree.
[0037] In a first aspect, embodiments of this application provide a serial communication conversion device 100 for an underwater production tree.
[0038] The serial communication converter 100 is connected to the external device 300 and the safety controller 200 of the subsea wellhead. The serial communication device is used for data transmission between the safety controller 200 and the external device 300 so that the safety controller 200 can provide safety protection for the external device 300.
[0039] like Figure 2As shown, the serial communication conversion device 100 includes a processor unit 101, a first communication unit 102, a second communication unit 103, a pressure monitoring unit 104, a network communication unit 105, a power supply unit 106, a display unit 107, and a storage expansion unit 108.
[0040] The processor unit 101 is used to convert between first data and second data. The first data is used for communication with the safety controller 200 of the subsea production tree, and the second data is used for communication with the external device 300.
[0041] The safety controller 200 sends control commands to the external device 300 via first data and receives status data fed back by the external device 300. The external device 300 identifies and executes the control commands via second data, and collects status data to feed back to the safety controller 200. Since the protocol formats of the first and second data are different, the processor unit 101 converts the protocol formats of the first and second data to realize communication between the safety controller 200 and the external device 300. The first data can be CANFD (Controller Area Network with Flexible Data Rate) data, and the second data can be RS485 (Recommended Standard 485) data.
[0042] like Figure 3 As shown, the processor unit 101 includes a first communication interface 1011, a second communication interface 1012, a third communication interface 1013, a fourth communication interface 1014, a fifth communication interface 1015, a sixth communication interface 1016, a first parsing module 1017, a second parsing module 1018, a third parsing module 1019, a fourth parsing module 10110, a display control module 10111, a network processing module 10112, a data conversion module 10113, an information recognition module 10114, a resource self-checking module 10115, and a security module 10116.
[0043] The first communication interface 1011 is communicatively connected to the first communication unit 102 and is used to transmit first data with the first communication unit 102. There are multiple first communication interfaces 1011, and the first communication interface 1011 can be a CANFD interface. The processor unit 101 receives or sends the first data through the first communication interface 1011.
[0044] The first parsing module 1017 is communicatively connected to multiple first communication interfaces 1011 and is used to parse the first data.
[0045] The second communication interface 1012 is communicatively connected to the second communication unit 103 and is used to transmit second data with the second communication unit 103. There are multiple second communication interfaces 1012, and each second communication unit 103 is communicatively connected to one of the second communication interfaces 1012. The second communication interface 1012 can be an RS485 interface, and the processor unit 101 receives or sends second data through the second communication interface 1012.
[0046] The second parsing module 1018 is communicatively connected to the first communication interface 1011. There are multiple second parsing modules 1018, each corresponding to one of the first communication interfaces 1011. The second parsing module 1018 is used to parse the second data.
[0047] The data conversion module 10113 is connected to the first parsing module 1017 and the second parsing module 1018, and is used for converting the first data and the second data.
[0048] The third communication interface 1013 is connected to the pressure monitoring unit 104 for receiving data collected by the pressure monitoring unit 104. The third communication interface 1013 can be an ADC (Analog-to-Digital Converter) interface.
[0049] The third analysis module 1019 is connected to the third communication interface 1013 to analyze the data collected by the pressure monitoring unit 104, read the pressure signal, monitor the pressure, and issue an alarm when the pressure exceeds the preset pressure threshold.
[0050] The fourth communication interface 1014 is communicatively connected to the network communication unit 105 and is used to transmit network signals. The fourth communication interface 1014 can be RMII (Reduced Media Independent Interface).
[0051] The fourth parsing module 10110 is communicatively connected to the fourth communication module 206 and is used to parse network signals or send network signals outward.
[0052] The fifth communication interface 1015 is connected to the display module and is used to send display control signals to the display module. The fifth communication interface 1015 can be a GPIO (General Purpose Input / Output) interface.
[0053] The display control module 10111 is connected to the fifth communication interface 1015 for generating display control signals according to the communication status of the serial communication conversion device 100, and sending the display control signals to the display module through the fifth communication interface 1015.
[0054] The sixth communication interface 1016 is connected to the storage expansion module for data interaction, including data reading and storage. The sixth communication interface 1016 can be an FMC (Flexible Static Memory Controller) interface, an I2C (Inter-Integrated Circuit) interface, or an SPI (Serial Communication Interface).
[0055] The network processing module 10112 is connected to the sixth communication interface 1016 and is used to parse and process network signals.
[0056] The information identification module 10114 is used to read the ID information composed of a resistor network on the serial communication conversion device 100, and is used for the identification of the serial communication conversion device 100 and the configuration of the communication address.
[0057] The resource self-test module 10115 is used to perform internal function self-tests during system power-on and normal operation, reset the first communication unit 102 or the second communication unit 103, and restart the serial communication conversion device 100 in the event of a communication fault.
[0058] The safety module 10116 is used to monitor the operating status of the processor unit 101 to prevent external interference from causing dead loops or external failures.
[0059] The first communication unit 102 is communicatively connected to the processor unit 101. The first communication unit 102 is also communicatively connected to the security controller 200. The first communication unit 102 is used to transmit first data between the security controller 200 and the processor unit 101. The security controller 200 sends or receives the first data to the processor unit 101 through the first communication unit 102. There are multiple first communication units 102, which are isolated from each other. Each first communication unit 102 is communicatively connected to one of the first communication interfaces 1011. The multiple first communication units 102 are redundant, ensuring that the other first communication units 102 can communicate normally when one of them fails, thus guaranteeing the reliability of data transmission in the serial communication conversion device 100.
[0060] like Figure 4 As shown, the first communication unit 102 includes a first communication transceiver 1021 and a first interface isolation module 1022.
[0061] The first communication transceiver 1021 is communicatively connected to the first communication interface 1011; the first interface isolation module 1022 is communicatively connected to the first communication transceiver 1021, and is also used to communicate with the safety controller 200. The first interface isolation module 1022 is communicatively connected to the main control module 202 in the safety controller 200. The main control module 202 and the processor unit 101 exchange first data through the first communication transceiver 1021, and the first interface isolation module 1022 provides electrical isolation, interference shielding, and overvoltage protection for the first communication transceiver 1021, making the multiple first communication units 102 independent of each other. The first communication transceiver 1021 can be a CANFD transceiver for transmitting CANFD data.
[0062] like Figure 5 As shown, there are multiple second communication units 103, which are isolated from each other. Each second communication unit 103 is communicatively connected to the processor unit 101, and also communicates with an external device 300. The second communication units 103 are used to transmit second data between the external device 300 and the processor unit 101. The external device 300 sends or receives second data to the processor unit 101 through the second communication units 103. Since the multiple second communication units 103 are isolated from each other, a failure of one second communication unit 103 does not affect the operation of the other second communication units 103, thereby ensuring the reliability of communication between the safety controller 200 and the external device 300.
[0063] The second communication unit 103 includes an optical coupler isolator 1031, a second communication transceiver 1032, and a second interface isolation module 1033.
[0064] Optical isolator 1031 is communicatively connected to second communication interface 1012; second communication transceiver 1032 is communicatively connected to optical isolator 1031; second interface isolation module 1033 is communicatively connected to second communication transceiver 1032, and second interface isolation module 1033 is also used for communication connection with external device 300. The processor module and external device 300 exchange second data with second communication transceiver 1032, and provide electrical isolation, interference shielding and overvoltage protection for the second communication transceiver through optical isolator 1031 and second interface isolation module 1033, so that the multiple second communication units 103 are independent of each other.
[0065] The first communication unit 102, the processor unit 101, and the second communication unit 103 constitute a complete communication link between the security controller 200 and the external device 300. When the security controller 200 sends control commands to the external device 300, it sends first data to the processor unit 101 via the first communication unit 102. The processor unit 101 converts the first data into second data and then sends the second data to the external device 300 via the second communication unit 103. The external device 300 receives the second data and executes the control commands from the security controller 200. When the external device 300 feeds back status data to the security controller 200, it sends the second data to the processor unit 101 via the second communication unit 103. The processor unit 101 converts the second data into first data and then sends the first data to the security controller 200 via the first communication unit 102.
[0066] like Figure 6 As shown, the pressure monitoring unit 104 includes a pressure sensor 1041 and a voltage follower 1042.
[0067] Pressure sensor 1041 is used to detect pressure and output analog signals; voltage follower 1042 is communicatively connected to pressure sensor 1041 and third communication interface 1013, and voltage follower 1042 is used to send analog signals to processor unit 101.
[0068] Pressure sensor 1041 is used to convert pressure signals from 10 kPa to 400 kPa into analog input signals, such as voltage signals from 0 to 5V, and voltage follower 1042 is used to increase input impedance.
[0069] The pressure signal is detected by the pressure sensor 1041 and converted into an analog input signal. After the input impedance is increased by the voltage follower 1042, it is input to the processor module through the third communication interface 1013.
[0070] like Figure 7 As shown, the network communication unit 105 includes a network chip 1051, a network port transformer 1052, and a network interface 1053.
[0071] The network chip 1051 is connected to the fourth communication interface 1014; the network port transformer 1052 is electrically connected to the network chip 1051; and the network interface 1053 is electrically connected to the network port transformer 1052.
[0072] Network chip 1051 is used to communicate with processor unit 101, enabling processor unit 101 to communicate with external device 300 via a network. Network chip 1051 can be an Ethernet PHY (Physical) chip. A network port transformer 1052 is connected in series between network chip 1051 and network interface 1053 for signal isolation, ensuring stable long-distance Ethernet signal transmission. Network interface 1053 is the physical connection interface of network chip 1051, and network interface 1053 can be a standardized RJ45 (Registered Jack 45) connection interface.
[0073] Processor unit 101 transmits network data to network chip 1051 via fourth communication interface 1014. Network chip 1051 encodes the network data and outputs it to network interface 1053 after isolation and amplification via network port transformer 1052. Alternatively, network data can be transmitted to network chip 1051 via network interface 1053 after isolation via network port transformer 1052, and then decoded by network chip 1051 before being transmitted to processor unit 101.
[0074] like Figure 8 As shown, the power supply unit 106 includes a first voltage converter 1061, a second voltage converter 1062, and a power monitoring module 1063.
[0075] The first voltage converter 1061 is used to convert the first voltage into multiple mutually isolated second voltages to provide power to the first communication unit 102 and the second communication unit 103; the second voltage converter 1062 is used to convert the second voltage into a third voltage; the power monitoring module 1063 is electrically connected to the second voltage converter 1062, and the power monitoring module 1063 is used to monitor the third voltage and perform a logic reset when the third voltage is lower than a preset voltage threshold so that the third voltage is restored.
[0076] The first voltage converter 1061 receives multiple redundant first voltages, such as two first voltages connected in parallel. The redundant first voltages can ensure stable voltage output and can still ensure stable power output of the power supply unit 106 when one first voltage fails.
[0077] The first voltage converter 1061 receives a first voltage of 24V and converts it into multiple second voltages of 5V±5% to provide power to the first communication unit 102 and the second communication unit 103. The second voltages supplied to the first communication unit 102 and the second communication unit 103 are isolated from each other to avoid mutual interference.
[0078] The second voltage converter 1062 receives a second voltage of 5V and converts it into a third voltage of 3.3V or 1.2V to provide power to the processor unit 101, the network communication unit 105, or the storage expansion unit 108.
[0079] Display unit 107 is used to display the operating status of serial communication conversion device 100.
[0080] The display unit 107 includes multiple LEDs (Light Emitting Diodes) for display control based on the display control signals from the processor unit 101.
[0081] The storage expansion unit 108 is communicatively connected to the processor unit 101 and is used to store data.
[0082] like Figure 9 As shown, the storage expansion unit 108 can be SDRAM (Synchronous Dynamic Random Access Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), or FLASH (Flash Memory).
[0083] The storage expansion unit 108 is connected to the sixth communication interface 1016, wherein the SDRAM is connected to the FMC interface, the EEPROM is connected to the I2C interface, and the FLASH is connected to the SPI interface.
[0084] In one embodiment, such as Figures 10-13 As shown: The serial communication conversion device 100 adopts a 3U wide board design, with a width of 100mm and a length of 180mm. It has no front panel mounting, a board thickness of 1.6mm, and the maximum component height is no more than 25mm. The back connector uses a 53-pin connector, and the board adopts a fanless passive heat dissipation design.
[0085] The processor unit 101 is a CPU (Central Processing Unit), and the processor unit 101 is connected to two mutually isolated first communication units 102 and eight mutually isolated second communication units 103.
[0086] The first communication unit 102 adopts the CANFD protocol and supports communication baud rates of 500kbps, 800kbps, 1Mbps, 2Mbps, and 2.5Mbps. The first communication unit 102 employs 1.5kV isolation protection. The two first communication units 102 provide redundant communication. The serial communication conversion device 100 interacts with the processor module via the first communication unit 102 using first data. The frame loss rate of the first communication unit 102 is less than 0.1%.
[0087] The serial communication conversion device 100 has a configurable ID (Identity document) as the ID address of the first communication unit 102, which is used to identify different serial communication conversion devices 100.
[0088] The second communication unit 103 adopts the RS485 communication protocol, supports baud rate configuration ranging from 1200bps to 115200bps, and is protected by 1.5kV isolation. The frame loss rate of the second communication unit 103 is less than 0.1%.
[0089] The first communication unit 102, the processor unit 101, and the second communication unit 103 constitute a unified protocol link layer. After the protocol link layer connection is successful, the first communication unit 102 receives configuration information from the security controller 200 to configure the second communication unit 103. The redundant first communication unit 102 adopts the same configuration.
[0090] After configuration, the first data of the CANFD communication protocol of the safety controller 200 is received through the first communication unit 102. The processor unit 101 converts the first data into the second data of the RS485 communication protocol and sends the second data to the external device 300 through the second communication unit 103.
[0091] The processor unit 101 receives second data from the external device 300 via the RS485 communication protocol through the second communication unit 103, converts the second data into first data via the CANFD communication protocol, and sends the first data to the security controller 200 via the first communication unit 102.
[0092] Secondly, embodiments of this application also provide an underwater production tree, such as... Figure 14 As shown, the subsea production tree includes a safety controller 200 and a serial communication conversion device 100 as described in the first aspect.
[0093] like Figure 15As shown, the safety controller 200 includes at least two redundant control devices, each including a communication bus 201, a main control module 202, an analog input module 203, a digital input module 204, a digital output module 205, and a communication module 206.
[0094] There are at least two communication buses 201, which are redundant with each other. If one communication bus 201 fails, the other communication bus 201 will be activated. The communication bus 201 is connected to the main control module 202, analog input module 203, digital input module 204, digital output module 205 and communication module 206.
[0095] The main control module 202 is used for information management and data processing, the analog input module 203 is used to receive external sensor signals, the digital input module 204 is used to receive external switch signals, the digital output module 205 is used to output control commands, and the communication module 206 is used to communicate with external devices 300.
[0096] The communication module 206 includes two types of communication components: a CAN (Controller Area Network) board and an RS485 (Recommended Standard) board. The communication module contains either 8 or 16 RS485 boards. Eight RS485 boards correspond to one serial communication buffer device 100, and 16 RS485 boards correspond to two serial communication conversion devices 100.
[0097] The serial communication converter 100 is connected to the safety controller 200 and is also used to communicate with external devices 300.
[0098] The safety controller 200 is connected to the first communication unit 102 of the serial communication converter 100 via the communication module 206. The safety controller 200 sends control commands in the CANFD communication protocol to the serial communication converter 100. The serial communication converter 100 converts the control commands into control commands in the RS485 communication protocol and sends them to the external device 300.
[0099] External device 300 feeds back status data via RS485 communication protocol to serial communication converter 100. Serial communication converter 100 converts the status data into status data via CANFD communication protocol and sends it to safety controller 200.
[0100] This application uses multiple isolated second communication units 103, where the failure of one second communication unit 103 does not affect the operation of the other second communication units 103. Combined with the processor unit 101 and the first communication unit 102, a complete communication link is formed, ensuring the reliability of communication between the safety controller 200 and the external device 300, and further ensuring the operational safety of the underwater production tree.
[0101] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.
[0102] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Although this application has disclosed preferred embodiments as above, it is not intended to limit this application. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the technical solution of this application. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.
Claims
1. A serial communication conversion device for subsea production trees, characterized in that, The serial communication conversion device is communicatively connected to external devices and the safety controller of the subsea wellhead. The serial communication conversion device includes: The processor unit is used to convert between first data and second data, wherein the first data is used for communication with the safety controller of the subsea production tree, and the second data is used for communication with external devices. A first communication unit is communicatively connected to the processor unit, and is also communicatively connected to the security controller. The first communication unit is used to transmit the first data between the security controller and the processor unit. Multiple mutually isolated second communication units, each second communication unit being communicatively connected to the processor unit, and each second communication unit also being used to communicate with an external device, the second communication unit being used to transmit the second data between the external device and the processor unit.
2. The serial communication conversion device according to claim 1, characterized in that, There are multiple first communication units, and the multiple first communication units are isolated from each other; The processor unit includes a plurality of first communication interfaces, and each first communication unit is communicatively connected to one of the first communication interfaces.
3. The serial communication conversion device according to claim 2, characterized in that, The first communication unit includes: A first communication transceiver, wherein the first communication transceiver is communicatively connected to the first communication interface; The first interface isolation module is communicatively connected to the first communication transceiver, and is also used to communicate with the security controller.
4. The serial communication conversion device according to claim 1, characterized in that, The processor unit includes multiple second communication interfaces, and each second communication unit is communicatively connected to one of the second communication interfaces.
5. The serial communication conversion device according to claim 4, characterized in that, The second communication unit includes: An optocoupler isolator, wherein the optocoupler is communicatively connected to the second communication interface; A second communication transceiver is communicatively connected to the optocoupler isolator; The second interface isolation module is communicatively connected to the second communication transceiver and is also used to communicate with the external device.
6. The serial communication conversion device according to claim 1, characterized in that, The processor unit includes a third communication interface; The serial communication conversion device further includes a pressure monitoring unit, which includes: Pressure sensor, used to detect pressure and output analog signal; A voltage follower, which is communicatively connected to the pressure sensor and the third communication interface, is used to send the analog signal to the processor unit.
7. The serial communication conversion device according to claim 1, characterized in that, The processor unit includes a fourth communication interface; The serial communication conversion device further includes a network communication unit, which includes: A network chip, which is communicatively connected to the fourth communication interface; A network port transformer, which is electrically connected to the network chip; A network interface, which is electrically connected to the network port transformer.
8. The serial communication conversion device according to claim 1, characterized in that, The serial communication conversion device further includes a power supply unit, which comprises: A first voltage converter is used to convert a first voltage into a plurality of mutually isolated second voltages to provide power to the first communication unit and the second communication unit.
9. The serial communication conversion device according to claim 8, characterized in that, The power supply unit further includes: A second voltage converter is used to convert the second voltage into a third voltage; A power monitoring module is electrically connected to the second voltage converter. The power monitoring module is used to monitor the third voltage and perform a logic reset when the third voltage is lower than a preset voltage threshold so that the third voltage is restored.
10. The serial communication conversion device according to claim 1, characterized in that, The serial communication conversion device also includes a display unit, which is used to display the operating status of the serial communication conversion device.
11. The serial communication conversion device according to claim 1, characterized in that, The serial communication conversion device further includes a storage expansion unit, which is communicatively connected to the processor unit and is used to store data.
12. A subsea oil production tree, characterized in that, The subsea wellhead includes: Safety controller; The serial communication conversion device according to any one of claims 1-11, wherein the serial communication conversion device is communicatively connected to the security controller, and the serial communication conversion device is further used for communicatively connecting to external devices.