Submarine sediment acoustic parameter in-situ measuring device

Abstract

The invention relates to a submarine sediment acoustic parameter in-situ measuring device comprising a gravity sampling device below which a gravity sampling tube is arranged, transmitting transducers, receiving transducers and a central controlling device which is arranged above the gravity sampling tube of the gravity sampling device and is internally provided with a controlling program, wherein at least four transmitting transducers and at least four receiving transducers are fixed on the gravity sampling tube through supporting racks, and two of the transmitting transducers are symmetrically arranged on the outer side surface of the upper part of he gravity sampling tube; the other two transmitting transducers are symmetrically arranged on the outer side surface of the lower part of the gravity sampling tube; the all the receiving transducers are arranged on the gravity sampling tube between two sets of the transmitting transducers; and the axes of the transmitting transducers andthe receiving transducers are parallel to the axis of the gravity sampling tube. The invention has the advantages of simple structure and obvious detection effect, increases the detection depth, improves the suitability to different substrate conditions, obviously improves the transmitting distance of the transducers, and greatly reduces the detection cost and time.

Description

technical field [0001] The invention belongs to equipment for measuring marine physical and acoustic parameters, in particular to a device for measuring acoustic parameters of sediments in an in-situ state on the seabed—an in-situ measurement device for acoustic parameters of seabed sediments. Background technique [0002] Acoustic parameters of seabed sediments have attracted increasing attention due to their important application value in the fields of ocean engineering survey, seabed resources exploration and development, and seabed environment monitoring. How to accurately obtain these parameters is an urgent technical problem that needs to be solved. The in-situ measurement technique offers an idea of ​​sending measurement equipment to the seafloor and making it measure these parameters with as little disturbance as possible to the original state of the sediment. The current acoustic in-situ measurement technology for seabed sediments can be divided into two types accor...

AI Technical Summary

Problems solved by technology

The existing technology does not fully consider the directivity problem in the selection and arrangement of the transducer, which limits the detection depth;

[0005] 2) The measurement is inaccurate when the transducer is not fully inserted: if the seabed sediment is hard or has a high viscosity, it may cause only part of the receiving transducer to be inserted into the sediment, and the rest are exposed in the water, and the emitted sound waves pass through the water. When the actual insertion depth cannot be determined, the calculated acoustic parameters are not the actual parameters of the sediment

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