Underwater dedicated double-redundant switching circuit

Abstract

The invention discloses an underwater dedicated double-redundant switching circuit which comprises a connection terminal P2 for receiving a signal, a connection terminal P3 for receiving an MCU control signal, a connection terminal P4 for connecting a main device, a connection terminal P1 for connecting a slave device, an optocoupler U1, a transistor Q1, a plurality of relays, and a power supply terminal for providing working power supply. The relays include signal input common ends and normally open ports and normally closed ports for outputting reception signals of the signal input common ends, the connection terminal P2 is connected to signal input common terminals, the normally closed ports are connected to one of the connection terminal P4 and the connection terminal P1, and the normally open ports are connected to the other connection terminal. The cost and interface resources can be saved for the device, one control signal can control multiple signals to be switched at the sametime, and the underwater dedicated double-redundant switching circuit is fast and efficient and has good reliability and applicability.

Description

technical field [0001] The invention relates to the field of underwater equipment signal switching, in particular to an underwater special double redundancy switching circuit. Background technique [0002] The submarine observation network needs to put the observation platform on the seabed, network the monitoring instruments on the seabed, connect the submarine nodes to the shore base station through long-distance photoelectric composite cables, realize the network of energy supply and information extraction on the seabed, and carry out long-term and continuous monitoring. , direct observation. The power monitoring system is an important part of the submarine observation network. Once the power monitoring system has an internal failure, it will affect the normal operation of the entire network and the maintenance cost will be high. Many situations such as self-leakage, abnormal transformer module, external load equipment, and interface cables may cause fatal damage. This r...

AI Technical Summary

Problems solved by technology

[0004] However, in the prior art, one IO port of the MCU controls a switch. The more system boards, the more IO ports are occupied. The larger the system, the more complicated the circuit, which cannot be used in such a large-scale system as the seabed observation network, and The internal structure of the MCU is relatively complex. When multiple IO ports control multiple switches, some signals may have been switched, while the other part has not been switched; there is also a problem that the MOS tube is extremely easy to damage and has no reliability; in addition The existing switching circuit can only be used when the MCU, the master device and the slave device are all on the same board, and the modular design cannot be realized, and the scope of application is narrow

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