What is the bottleneck of underwater robot technology？

Once the underwater robot breaks through the technology, its import substitution space is vast. However, the practical application of domestic underwater vehicles is limited due to the large gap in detection technology, process level, integrated display and control, integrated navigation and positioning technology.

This article is mainly about underwater navigation (positioning) and communication technology for underwater robots

A. Underwater navigation (positioning) technology

There are many navigation systems for autonomous robots, such as inertial navigation systems, gravity navigation systems, submarine terrain navigation systems, geomagnetic field navigation systems, gravity system navigation, long baselines, short baselines and fiber-optic gyroand and Doppler meter stogout systems. Due to price and technology and other reasons, it is generally favored by the fiber optic gyro and Doppler meter composed of the calculation system. The system can meet the requirements of underwater use of robots, both in terms of price, scale and precision, which is being developed at home and abroad.

B. Communications technology

At present, the main means of communication are optical fiber and hydroacoustic communication.

Optical fiber communication consists of optical end machine (surface), underwater optical end machine, fiber optic cable. The advantage is that the transmission rate is high (100Mbit/s) and has good anti-jamming ability. The disadvantage is that it limits the working distance and maneuverability of underwater robots, which are commonly used in the robots with cables.

Hydroacoustic communication is the only and ideal communication method for underwater robots to realize medium- and long-distance communication. The most important obstacle to the realization of hydroacoustic communication is random multi-way interference, which requires solving a number of technologies to meet the requirements of large range and high data rate transmission.

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