Device for underwater sound velocity measurement and use method thereof

Abstract

The invention provides a device for underwater sound velocity measurement and a use method thereof. The device comprises a sound velocity measuring device, a booster pump and a control device, the sound velocity measuring device comprises a sound velocity measuring container, and a sound wave transmitting transducer, a hydrophone, a temperature controller, a salinity indicator and a laser ranging device which are connected to the sound velocity measuring container; and the control device is connected with the sound wave transmitting transducer, the hydrophone, the temperature controller, the salinity indicator and the laser ranging device. According to the device for underwater sound velocity measurement and the use method thereof, sound velocity measurement under different water depths, different temperatures and different salinity in the ocean can be simulated through the device, the underwater sound velocity error measured in an indirect mode is corrected, and the measurement precision of CTD and other instruments is improved.

Description

technical field [0001] The invention relates to the field of marine science, in particular to a device for measuring underwater sound velocity and a method for using the same. Background technique [0002] Underwater sound velocity is the most basic parameter information required for underwater acoustic research and ocean engineering practice, and it is an important physical parameter reflecting the characteristics of seawater media. Underwater sound velocity refers to the propagation speed of sound waves in water. Due to the existence of seawater medium, the attenuation of other signals (such as optical signals, electromagnetic signals, etc.) Realize the energy signal of long-distance transmission. Due to the uneven distribution of temperature and salinity in the seawater medium, there are large differences in the speed of sound in different regions and depths in the ocean. Accurate measurement of underwater sound velocity can provide correction information for fish finde...

AI Technical Summary

Problems solved by technology

[0007] 1. When measuring the sound velocity in deep ocean waters, when using a sound velocity meter for direct measurement, although the measured sound velocity is highly accurate, it is inconvenient to recycle the instrument, the implementation is difficult, and it cannot be measured during navigation, and the equipment is expensive and the measurement efficiency is low. , to obtain a single parameter, which is difficult to implement in the measurement of large-area sound velocity field

[0008] 2. When using the temperature, salt and depth instrument to measure the sound velocity indirectly, it is necessary to refer to the empirical formula for the sound velocity conversion, but different regions have different empirical formulas, and there are often large differences between the empirical formula conversion results and the actual sound velocity, which cannot Meet some scientific research and engineering needs

[0009] 3. At present, when measuring the speed of sound in deep waters, long signal cables are often required, the instrument is inconvenient to recycle, and the measurement is difficult to control, especially when there are large currents and swells, the measurement is more difficult; when using throwing When measuring the sound velocity of a conventional instrument, it is difficult to measure the sound velocity of the water layer, and there are problems such as wire wear and easy collision of the probe, causing data errors

Images