Serial data bus applied to underwater vehicle

Abstract

The invention provides a serial data bus applied to an underwater vehicle. The bus includes first-type data transmission lines, second-type data transmission lines and third-type data transmission lines. The first-type data transmission lines use a manner of time division multiplexing in transmitting data. The second-type data transmission lines use a manner of token polling in transmitting data.The third-type data transmission lines are at least one type in a CAN bus and an Ethernet bus. According to the serial data bus, realization is simple, and transmission requirements of various signalsin the underwater vehicle can be effectively satisfied.

Description

technical field [0001] The invention belongs to the field of underwater vehicle data bus technology, in particular to a serial data bus applied to underwater vehicles. Background technique [0002] In the actual application of the underwater vehicle, various signals need to be transmitted between various functional segments, and the transmission of these signals needs to be completed through the bus. The bus is to multiplex the digitized signals on a set of cables that run through from the head to the tail of the vehicle, and each core wire has the same electrical characteristics and definitions on each functional segment. [0003] The buses commonly used by underwater vehicles include serial bus (RS232, RS485), CAN bus and Ethernet bus. The RS232 serial bus has a low transmission rate and is generally used to transmit slow-changing signals or communication information with a small amount of data; the RS485 serial bus has a high transmission rate and can be used to transmit...

AI Technical Summary

Problems solved by technology

The RS232 serial bus has a low transmission rate and is generally used to transmit slow-changing signals or communication information with a small amount of data; the RS485 serial bus has a high transmission rate and can be used to transmit high-speed signals, but each signal requires a pair of signal lines for transmission , Multi-channel signal transmission requires the use of multiple sets of signal lines, resulting in complex bus composition, signal interference and other problems; CAN bus and Ethernet bus have high transmission rates, but due to the complexity of the protocol, the real-time performance of signal transmission is not high

Generally speaking, the use of the above-mentioned buses alone is not because of the transmission rate and real-time performance that cannot meet the usage requirements, or the electromagnetic characteristics of the bus are poor.

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