Doppler speed log

Abstract

The invention discloses a Doppler speed log which comprises a transmitter module, a transducer module, a receiver module, a signal processor module, a displayer module, a compass speed compensation converter module and a gyrocompass module. The transmitter module is used for generating electrical signals with a fixed wave length and sufficient power, and the transducer module is composed of piezoelectric ceramic elements and used for receiving back waves returned by seabed diffuse reflection or volume reverberation and converting acoustic energy into the electrical signals. The receiver module is used for amplifying received back wave signals and detecting frequency of all beams. The signal processor module is used for outputting speed information. The displayer module is used for being in charge of displaying system parameter information. The compass speed compensation converter module is used for compensating speed errors. The gyrocompass module is used for determining directional reference of a geographic coordinate system. According to the Doppler speed log, the transmission signals of the transmitter module are a pair of broadband coded pulse signals, changes of time intervals of back wave pulses of the pair of pulse signals are measured to solve relative flow velocity, in the process of high-speed sailing, a phase position preset adjustment compensation method is adopted for solving the problem of speed ambiguity, and the Doppler speed log is deeper in detection and higher in measuring precision compared with an existing log.

Description

technical field [0001] The invention belongs to the field of underwater operation equipment, in particular to a Doppler log. Background technique [0002] At present, the operating sea area of ​​underwater vehicles is wider and wider, and the navigation speed is higher and higher. Therefore, only the Doppler log with large depth and high speed can meet the needs of current underwater vehicles. At present, there is no such acoustic Doppler log in China. The imported 30kHZ acoustic Doppler log from American R&D Company has an actual detection depth of less than 20m. It is very sensitive and a technical blockade is implemented. Therefore, the country must independently develop high-precision, large-depth, and high-speed Doppler loggers to solve key technologies for improving the intelligent control and navigation positioning accuracy of underwater vehicles. Therefore, the successful development of high-precision Doppler log can not only replace imported instruments with domest...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a Doppler log, which aims to solve the problem that the performance of the existing underwater Doppler log cannot meet the needs of large-depth, high-speed underwater vehicles

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