Underwater electronic module based on control board card

Abstract

The invention provides an underwater electronic module based on a control board card. The underwater electronic module comprises a shell, a power system, a communication system and a control system, the shell comprises an external pressure-resistant shell (27), a top cover (1), an inner core bracket (2), a supporting tail end (11) and a concave cover plate (12); the electric power system comprises a high-power dry-type plugging electric connector (15), a low-power dry-type plugging electric connector (16), a transformer (3), a 24VDC power supply module (5) and a 24VDC power supply redundancy module (6); the communication system comprises a dry-type plug-in optical plug (19), an optical fiber switch (7), a photoelectric module (28), a power line carrier module (13) and a Modbus RTU / TCP gateway (14). And the control system comprises a control board card group I (9), a control board card group II (10) and a relay (8). Compared with an existing underwater electronic module, two sets of stacked control board cards based on PC104 are adopted, and the underwater electronic module has the advantages of being higher in reliability, smaller in used space, higher in production efficiency and better in stability.

Description

Technical Field

[0001] The invention relates to an underwater electronic module based on a control board, belonging to the technical field of offshore oil engineering. Background Art

[0002] In recent years, with the development of detection technology, more and more underwater oil and gas resources have been explored in my country's extensive oceans, and there are still a large number of unexplored oil and gas resources. According to the current International Energy Agency's Marine Energy Outlook, 25% of the current oil and gas resources produced come from the ocean, and the proportion is increasing year by year. In my country's South China Sea, the total amount of proven submarine oil and gas in the vast sea area accounts for 12% of the world's total reserves. Therefore, the exploitation of underwater oil and gas resources is becoming more and more important.

[0003] At present, the exploitation of underwater oil and gas resources mainly relies on underwater production systems, including key components such as transmission umbilical cables, underwater control modules, manifolds, and Christmas trees. The current underwater production system manufacturers mainly come from developed European countries such as Norway and the United Kingdom. The underwater electronic module is the brain of the underwater production system. As the core device for controlling and monitoring the entire underwater production system, from the perspective of the failure rate of underwater production systems of some third-party certification agencies, the underwater electronic module is the component with the highest failure rate / fault rate in the underwater production system, and its reliability is particularly important. Summary of the invention

[0004] The present invention aims to solve the technical problems that the existing underwater electronic modules are large in size and poor in adaptability and expandability, and further proposes an underwater electronic module based on a control board.

[0005] The technical solution adopted by the present invention to solve the above problems is: the structure of an underwater electronic module based on a control board provided by the present invention comprises:

[0006] Housing, power system, communication system and control system;

[0007] The shell comprises an external pressure-resistant shell (27), a top cover (1), a core support (2), a supporting tail end (11), and a concave cover plate (12);

[0008] The power system includes a high-power dry plug-in electrical connector (15), a low-power dry plug-in electrical connector (16), a transformer (3), a 24VDC power supply module (5), and a 24VDC power supply redundancy module (6);

[0009] The communication system includes a dry-plug optical plug (19), an optical fiber switch (7), an optoelectronic module (28), a power carrier module (13), and a Modbus RTU / TCP gateway (14);

[0010] The control system comprises a control board group 1 (9), a control board group 2 (10) and a relay (8).

[0011] Optionally, the top cover (1) is connected to the pressure-resistant housing (27) by bolts and sealed by a sealing ring, and the top cover (1) is provided with a through hole for connecting a high-power dry plug electrical connector (15), a low-power dry plug electrical connector (16) and a dry plug optical plug (19), as well as an exhaust port sealing plug (17) and an air filling port sealing plug (18);

[0012] The pressure-resistant housing (27) and the top cover (1) form a sealed electronic compartment, the interior of which is divided into a high-voltage power compartment, a communication compartment and a control compartment by a core bracket.

[0013] Optionally, a high-power dry-plug electrical plug (15) and a low-power dry-plug electrical plug (16) are fixed to the top cover (1) by bolt flange connection and axially and radially sealed by sealing rings. The transformer (3) is fixed to the top cover (1) by bolts, and the 24VDC power supply module (5) and the 24VDC power supply redundancy module (6) are fixed to the core bracket (2) by screws.

[0014] Optionally, a high-power dry-plug electrical plug (15) is used to transmit the power transmitted by the water platform to the transformer (3);

[0015] The transformer (3) is used to transform the transmitted electric power;

[0016] The 24VDC power supply module (5) is used to receive the transformed electric power and supply power to the 24VDC power supply redundancy module (6) through the low-power dry plug-in electrical connector (16) and the 24VDC power supply module (5) in another underwater electronic module of the same group;

[0017] The 24VDC power redundancy module (6) supplies power to the entire underwater electronic module.

[0018] Optionally, the dry-plug optical plug (19) is fixed to the top cover (1) by bolt flange connection and axially and radially sealed by sealing rings, and the optical fiber switch (7), power carrier module (13), and Modbus RTU / TCP gateway (14) are fixed to the core bracket (2) by screws.

[0019] Optionally, the dry-plug optical plug (19) is used to receive optical signals transmitted by the umbilical cable;

[0020] The optoelectronic module (28) is used to convert the optical signal into an electrical signal readable by the TCP / IP protocol;

[0021] The optical fiber switch (7) is used to receive electrical signals and to communicate with the optoelectronic module (28), the power carrier module (13), the ModbusRTU / TCP gateway (14) and the control system via optical fiber;

[0022] The photoelectric module (28) is used for converting photoelectric signals;

[0023] The power carrier module (13) is used for carrier communication;

[0024] The Modbus RTU / TCP gateway (14) is used to convert between TCP / IP and RS485 protocols, while the host computer uses optical fiber communication to complete the programming and control of specific components.

[0025] Optionally, the control board group 1 (9) includes a slave CPU board (20), a communication board (21), a data acquisition board (22), a power board (23) and a filter board (24); the control board group 2 (10) includes a master CPU board (25), a data acquisition board (22), a switch input and output board (26), a power board (23) and a filter board (24); the control board group 1 (9) and the control board group 2 (10) are plugged in using a PC104 bus; the control board group 1 (9) and the control board group 2 (10) are fixed to the core bracket (2) by screws; and the relay (8) is fixed to the core bracket by a guide rail.

[0026] Optionally, the CPU board (25) is used to send control instructions to the switch input and output board (26) and communicate with the host computer;

[0027] The slave CPU board (20) is used to process the data collected by the data acquisition board (23) and transmit the processed data to the master CPU board (25);

[0028] The communication board (21) includes a communication board (21) including an RS485 / RS433 / RS232 / CAN channel for receiving signals sent by devices with multiple different communication protocols;

[0029] The data acquisition board (23) is used to collect data from the sensor;

[0030] The power board (23) is used to supply power to the control board group 1 (9) and the control board group 2 (10);

[0031] The filter board (24) adopts low-pass π-type filtering to obtain effective signals;

[0032] The relay (8) is used to connect to another underwater electronic module in the same group through a dry plug-in electrical connector (16) to complete mutual switching and restarting of the underwater electronic modules.

[0033] The beneficial effects of the present invention are:

[0034] 1. Since the present invention adopts two sets of stacked control boards based on PC104, compared with the existing underwater electronic modules, it has the advantages of higher reliability, smaller space, higher production efficiency and better stability.

[0035] 2. The present invention adopts a redundant solution with multiple system redundancy. Compared with the previous underwater electronic module which only provided redundancy for the power system, the new redundant solution improves the reliability of the overall solution, making the power system, communication system and control system redundant, and significantly improving the reliability.

[0036] 3. The SEM of the present invention has a light overall weight, a reasonable internal distribution, and each system is arranged in a compartment, which is more conducive to heat dissipation and prevention of mutual interference compared to the SEM based on the control module. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A front view of the underwater electronic module SEM based on the control board provided by the present invention;

[0038] Figure 2 A diagram of the pressure-resistant housing of the underwater electronic module SEM based on the control board provided by the present invention;

[0039] Figure 3 A main view of the cabin of the underwater electronic module SEM based on the control board provided by the present invention;

[0040] Figure 4 A top view of the top cover of the underwater electronic module SEM based on the control board provided by the present invention;

[0041] Figure 5 A side view of a control board assembly of an underwater electronic module SEM based on a control board provided by the present invention;

[0042] Figure 6 A second side view of a control board assembly of an underwater electronic module SEM based on a control board provided by the present invention;

[0043] In the figure, 1-top cover, 2-core bracket, 3-transformer, 4-voltage sensor, 5-24VDC power supply, 6-24VDC power supply redundancy module, 7-optical fiber switch, 8-relay, 9-control board group one, 10-control board group two, 11-tail bracket, 12-concave cover, 13-power carrier module, 14-Modbus RTU / TCP gateway, 15-high-power dry-plug electric plug, 16-low-power dry-plug electric plug, 17-exhaust port sealing plug, 18-inflating port sealing plug, 19-dry-plug optical plug, 20-slave CPU board, 21-communication board, 22-data acquisition board, 23-power board, 24-filter board, 25-main CPU board, 26-switch input and output board, 27-pressure shell, 28-photoelectric module, SEM is an underwater electronic module. Example

[0044] Combination Figure 1-6 This embodiment is described as follows. Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the shell includes an external pressure-resistant shell (27), a top cover (1), an inner core bracket (2), a support tail end (11), and a concave cover plate (12). The external pressure-resistant shell (27) can withstand a pressure of more than 25 MPa and can ensure the normal operation of the internal electronic sealed cabin in an underwater environment of 2000 m. The top cover (1) is provided with through holes for multi-core dry electrical connectors (15) (16) and multi-core dry optical connectors (19) as well as an exhaust port sealing plug (17) and an air filling port sealing plug (18) for power supply and communication of internal components. The inner core bracket (2) divides the whole into three cabins. The cabins are designed based on the structures of different components. The support tail end (11) can ensure that the SEM is placed horizontally in the pressure-resistant shell.

[0045] The power system comprises a high-power dry plug-in electrical connector (15), a low-power dry plug-in electrical connector (16), a transformer (3), a 24VDC power supply module (5), and a 24VDC power supply redundancy module (6). The water platform transmits power to the wet plug-in electrical connector of the underwater control module (SCM) through an umbilical cable, and then connects to the high-power dry plug-in electrical connector (15) on the SEM top cover (1) through a loose wire, and connects it to the transformer (3) through an internal loose wire. The power after the transformer transformation is transmitted to the 24VDC power supply module (5). The 24VDC power supply module (5) of SEM-A and the 24VDC power supply module (5) of SEM-B through the low-power dry plug-in electrical connector (16) jointly supply power to the 24VDC power supply redundancy module (6) to achieve the purpose of power redundancy. The 24VDC power supply redundancy module (6) supplies power to the entire system, including the communication system and control system inside the SEM, and other electronic components inside the SCM.

[0046] The communication system comprises a dry-plug optical plug (19), an optical fiber switch (7), an optoelectronic module (28), a power carrier module (13), and a Modbus RTU / TCP gateway (14). The dry-plug optical plug (19) on the SEM top cover (1) is used to receive an optical signal transmitted by an umbilical cable. The optical signal is transmitted to the optoelectronic module (28) via an optical flying line. The optoelectronic module (28) is used to convert the optical signal into an electrical signal readable by the TCP / IP protocol, and then communicates with the Modbus RTU / TCP gateway (14), the power carrier module (13), and the SEM control system via the optical fiber switch (7). The power carrier module (13) is used for carrier communication and also forms redundancy. If the optical fiber signal is broken, long-distance power carrier communication can be performed via the power line to avoid overall failure of the SEM. The Modbus RTU / TCP gateway (14) completes the conversion between the TCP / IP and RS485 protocols, and is used by the host computer to complete the program writing / control of specific components using optical fiber communication.

[0047] like Figure 5 and Figure 6As shown, the control system comprises a main CPU board (25), a slave CPU board (20), a serial communication board (21), a switch input and output board (26), a data acquisition board (22), a power supply board (23), a filter board (24), and a relay (8), wherein the main CPU board (25) is used to send instructions to the switch input and output board (26) to achieve the purpose of control and communicate with the host computer, the slave CPU board (20) is used to process the data collected by the data acquisition board (23) and transmit the processed data to the main CPU board (25), and the serial communication board (21) comprises The RS485 / RS433 / RS232 / CAN channels can receive and send signals sent by devices of various different communication protocols, thereby ensuring the scalability of the SEM. The switch input and output board (26) can perform on-off control on external devices. The data acquisition board (23) is used to collect data collected by the sensor. The power board (23) is used to supply power to the entire stacked board group. The filter board (24) uses a low-pass π-type filter to obtain more effective signals. The relay (8) is connected to another SEM in the same group through a dry plug-in electrical connector (16) to achieve the purpose of mutual switching and restarting.

[0048] The above is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent replacement and improvement made to the above embodiments without departing from the content of the technical solution of the present invention, based on the technical essence of the present invention, within the spirit and principles of the present invention, still fall within the protection scope of the technical solution of the present invention.

Claims

1. An underwater electronic module based on a control board, characterized in that: The structure of the underwater electronic module based on the control board includes: a housing, a power system, a communication system and a control system; The shell comprises an external pressure-resistant shell (27), a top cover (1), a core support (2), a supporting tail end (11), and a concave cover plate (12); The power system comprises a high-power dry plug-in electrical connector (15), a low-power dry plug-in electrical connector (16), a transformer (3), a 24VDC power supply module (5), and a 24VDC power supply redundancy module (6); The communication system comprises a dry-plug optical plug (19), an optical fiber switch (7), an optoelectronic module (28), a power carrier module (13), and a Modbus RTU / TCP gateway (14); The control system comprises a control board group 1 (9), a control board group 2 (10) and a relay (8).

2. The underwater electronic module based on the control board according to claim 1, characterized in that: The top cover (1) is connected to the pressure-resistant housing (27) by bolts and sealed by a sealing ring. The top cover (1) is provided with a through hole for connecting a high-power dry plug-in electrical connector (15), a low-power dry plug-in electrical connector (16) and a dry plug-in optical plug (19), as well as an exhaust port sealing plug (17) and an air filling port sealing plug (18); The pressure-resistant housing (27) and the top cover (1) form a sealed electronic compartment, the interior of which is divided into a high-voltage power compartment, a communication compartment and a control compartment by a core bracket.

3. The underwater electronic module based on the control board according to claim 1, characterized in that: The high-power dry-plug electrical plug (15) and the low-power dry-plug electrical plug (16) are fixed to the top cover (1) by bolt flange connection and are axially and radially sealed by sealing rings. The transformer (3) is fixed to the top cover (1) by bolts. The 24VDC power supply module (5) and the 24VDC power supply redundancy module (6) are both fixed to the core bracket (2) by screws.

4. The underwater electronic module based on the control board according to claim 1, characterized in that: The high-power dry-plug electrical plug (15) is used to transmit the electric power transmitted by the water platform to the transformer (3); The transformer (3) is used to transform the transmitted electric power; The 24VDC power supply module (5) is used to receive the transformed electric power and supply power to the 24VDC power supply redundancy module (6) through the low-power dry plug-in electrical connector (16) and the 24VDC power supply module (5) in another underwater electronic module of the same group; The 24VDC power redundancy module (6) supplies power to the entire underwater electronic module.

5. The underwater electronic module based on the control board according to claim 1, characterized in that: The dry-plug optical plug (19) is fixed to the top cover (1) by bolt flange connection and is sealed axially and radially by sealing rings. The optical fiber switch (7), power carrier module (13) and Modbus RTU / TCP gateway (14) are fixed to the core bracket (2) by screws.

6. The underwater electronic module based on the control board according to claim 1, characterized in that: The dry-plug optical plug (19) is used to receive the optical signal transmitted by the umbilical cable; The optoelectronic module (28) is used to convert the optical signal into an electrical signal readable by the TCP / IP protocol; The optical fiber switch (7) is used to receive electrical signals and perform optical fiber communication with the optoelectronic module (28), the power carrier module (13), the ModbusRTU / TCP gateway (14) and the control system; The photoelectric module (28) is used for converting photoelectric signals; The power carrier module (13) is used for carrier communication; The Modbus RTU / TCP gateway (14) is used to convert between TCP / IP and RS485 protocols, while the host computer uses optical fiber communication to complete program writing and control of specific components.

7. The underwater electronic module based on the control board according to claim 1, characterized in that: The control board group 1 (9) comprises a slave CPU board (20), a communication board (21), a data acquisition board (22), a power board (23) and a filter board (24); the control board group 2 (10) comprises a master CPU board (25), a data acquisition board (22), a switch input and output board (26), a power board (23) and a filter board (24); the control board group 1 (9) and the control board group 2 (10) are plugged in using a PC104 bus; the control board group 1 (9) and the control board group 2 (10) are fixed on a core bracket (2) by screws; and the relay (8) is fixed on the core bracket by a guide rail.

8. The underwater electronic module based on the control board according to claim 7, characterized in that: The CPU board (25) is used to send control instructions to the switch input and output board (26) and communicate with the host computer; The slave CPU board (20) is used to process the data collected by the data collection board (23) and transmit the processed data to the master CPU board (25); The communication board (21) comprises a communication board (21) comprising an RS485 / RS433 / RS232 / CAN channel for receiving signals sent by devices of various different communication protocols; The data acquisition board (23) is used to collect data from the sensor; The power board (23) is used to supply power to the control board group 1 (9) and the control board group 2 (10); The filter card (24) adopts a low-pass π-type filter to obtain a valid signal; The relay (8) is used to connect to another underwater electronic module in the same group through a dry plug-in electrical connector (16) to complete mutual switching and restarting of the underwater electronic modules.

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