A dedicated underwater dual redundant switching circuit

Abstract

The invention discloses an underwater dedicated dual-redundancy switching circuit, comprising: a connection terminal P2 for receiving signals, a connection terminal P3 for receiving MCU control signals, a connection terminal P4 for connecting main equipment, and a connection terminal P4 for connecting The connection terminal P1 of the slave device also includes an optocoupler U1, a transistor Q1, several relays and power terminals for providing working power. The relays include a signal input common terminal and a normally open port for receiving signals from the output signal input common terminal, For the normally closed port, the connection terminal P2 is connected to the signal input common terminal, the normally closed port is connected to one of the connection terminal P4 or the connection terminal P1, and the normally open port is connected to the other. The present invention can realize multi-point switching, and only needs to occupy one IO port, which can save cost and interface resources for equipment, and one control signal can control multiple signals to switch simultaneously, which is fast and efficient, and meanwhile has good reliability and strong 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...

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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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