Three-dimensional in-situ real-time submarine sediment acoustic section scanning device

A technology of seabed sediments and scanning devices, which is used in measurement devices, scientific instruments, and analysis of solids using sonic/ultrasonic/infrasonic waves.

Active Publication Date: 2020-06-09
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to make up for the deficiencies of the existing technology and solve the problems of single measurement depth, single measurement path, small penetration depth of the probe rod, in-situ measurement of longitudinal waves, inability to obtain data in time, and long-term measurement of seabed sediments in the prior art, this paper The invention provides a three-dimensional in-situ real-time seabed sediment acoustic section scanning device

Method used

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  • Three-dimensional in-situ real-time submarine sediment acoustic section scanning device

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Effect test

Embodiment 1

[0045] Such as Figure 1-Figure 5 As shown, a three-dimensional in-situ real-time seabed sediment acoustic section scanning device includes a support frame 2, and in this embodiment, the support frame 2 is in the shape of a hexagonal prism. The supporting frame 2 is fixed with an underwater acoustic communication machine-1. Inside the support frame 2 are fixed a master control cabin 22 , an acoustic signal emitting collection cabin 21 , a power supply cabin 19 and a hydraulic cabin 20 .

[0046] This three-dimensional in-situ real-time seabed sediment acoustic section scanning device includes six acoustic probe rods 3, and the connection line of the six acoustic probe rods 3 is a regular hexagon (this place is only an example of the positional relationship between the six acoustic probe rods 3, not Six acoustic probe rods 3 are connected to each other). Six transducers 4 are arranged in each acoustic probe rod 3 , and the longitudinal axes of the six transducers 4 arranged i...

Embodiment 2

[0104] The types of the transducers 4 in the acoustic probe rod 3 are different, and the rest are the same as in the first embodiment.

[0105] In this embodiment, the six acoustic probe rods (acoustic probe rod ①, acoustic probe rod ②, acoustic probe rod ③, acoustic probe rod ④, acoustic probe rod ⑤, and acoustic probe rod ⑥) are all longitudinal wave transducers.

[0106] When the acoustic probe rods are all longitudinal wave transducers, step 9 and step 10 are combined into one step, and the acoustic emission acquisition unit automatically emits and collects longitudinal wave signals:

[0107] The specific scan test process is:

[0108] Among them, the uppermost longitudinal wave transducer in the acoustic probe ① is used as the transmitting transducer, and the longitudinal wave transducers in the acoustic probe ②, ③, ④, ⑤, and ⑥ are used as the receiving transducers;

[0109] The second longitudinal wave transducer from the top in the acoustic probe ① is used as the trans...

Embodiment 3

[0121] The types of the transducers 4 in the acoustic probe rod 3 are different, and the rest are the same as in the first embodiment.

[0122] In this embodiment, the six acoustic probe rods (acoustic probe rod ①, acoustic probe rod ②, acoustic probe rod ③, acoustic probe rod ④, acoustic probe rod ⑤, and acoustic probe rod ⑥) are shear wave transducers.

[0123] When the acoustic probe rods are all shear wave transducers, step 9 and step 10 are combined into one step, and the acoustic emission acquisition unit automatically emits and collects shear wave signals:

[0124] The specific scan test process is:

[0125] Among them, the uppermost shear wave transducer in the acoustic probe ① is used as the transmitting transducer, and the shear wave transducers in the acoustic probe ②, ③, ④, ⑤, and ⑥ are used as the receiving transducers;

[0126] The second shear wave transducer from the top in the acoustic probe ① is used as the transmitting transducer, and the shear wave transdu...

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Abstract

The invention discloses a three-dimensional in-situ real-time submarine sediment acoustic section scanning device, and belongs to the field of marine geological detection. The device comprises a supporting frame, the supporting frame is provided with an underwater acoustic communicator, a control unit, an acoustic signal transmitting and collecting unit and a penetration system, and the penetration system is provided with a plurality of acoustic feeler levers; each acoustic feeler lever is at least provided with a plurality of longitudinal wave transducers in the longitudinal direction or at least provided with a plurality of transverse wave transducers; one longitudinal wave transducer is used as a transmitting transducer, and the longitudinal wave transducers in other acoustic feeler levers are used as receiving transducers; or one of the transverse wave transducers is used as a transmitting transducer, and the transverse wave transducers in the other acoustic feeler levers are usedas receiving transducers; and each longitudinal wave transducer or each transverse wave transducer is in communication connection with the acoustic signal transmitting and collecting unit. The three-dimensional longitudinal wave and transverse wave characteristics of the seabed sediment can be obtained in real time; and the saturation of the natural gas hydrate in the sediment in a measurement area is obtained through the inversion of the relationship between the hydrate saturation and the elastic wave velocity.

Description

technical field [0001] The invention relates to the field of marine geological exploration, in particular to a three-dimensional in-situ real-time seabed sediment acoustic section scanning device. Background technique [0002] Natural gas hydrate is a potential energy resource. At present, geophysical exploration is still an important means of gas hydrate exploration and resource evaluation. The reservoir elastic wave velocity and other parameters obtained by high-resolution seismic survey technology can be applied to the establishment of the relationship model between hydrate saturation and elastic wave velocity, in order to Seismic wave velocity can accurately predict whether hydrates are contained in sediments, or estimate the saturation of hydrates in sediments, so as to complete the evaluation of reservoir resources. [0003] Due to the lack of data between the measured hydrate saturation and in-situ acoustic velocity, and the practicability of the same model in differ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/024G01N29/07G01N29/22G01N29/265
CPCG01N29/024G01N29/07G01N29/22G01N29/265G01N2291/011
Inventor 贾永刚孙志文孟庆生
Owner OCEAN UNIV OF CHINA
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