Hydraulic drive injection based bottom sediment acoustic characteristic in-situ detecting system

Abstract

The invention provides a hydraulic drive injection based bottom sediment acoustic characteristic in-situ detecting system, comprising a framework, a transceiving transducer and a transducer injection device. The system is characterized in that the injection device is a hydraulic injection driving device of a pulley combined mechanism, and comprises a hydraulic rod driven by a hydraulic pump, upper and lower movable pulleys fixed on the upper end of the hydraulic rod, three upper fixed pulleys fixed on the upper part of the framework and three lower fixed pulleys fixed on the lower part of theframework, wherein two steel cables pass through two through holes in the middle of a movable pressure plate, and are fixed on the framework by upward moving around the two upper fixed pulleys, the upper movable pulley and the other upper fixed pulley in turn, and are fixed on the frame by downward moving around the two lower fixed pulleys, the lower movable block and the other lower fixed block.The system is suitable for various types of bottom sediment substrates with remarkable injection effect and wide application range, has small interference to bottom sediment and small impact on the transducer with high stability and high detection accuracy, does not require real-time manipulation when full automatically working in sea bottom to reduce marine survey cost.

Description

technical field [0001] The invention relates to marine measurement equipment, in particular to an in-situ detection system for acoustic characteristics of seabed sediments based on hydraulic drive penetration, and belongs to the technical field of marine physical measurement. Background technique [0002] The acoustic properties of seabed sediments, including sound velocity and sound attenuation coefficient, are one of the important parameters to characterize the basic physical properties of seabed sediments. Military activities such as the design and use of hydroacoustic equipment provide important parameters and are of great significance to national defense construction. Moreover, the use of acoustic parameters such as sound velocity and sound attenuation coefficient of sediments to evaluate the properties of seabed geotechnical engineering has important application value in the fields of marine engineering survey, seabed resource exploration and development, etc. At pres...

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Problems solved by technology

This technology has the following problems: (1) relying on the self-weight of the gravity sampler to drive the acoustic transducer to quickly insert the seabed sediment, which greatly disturbs the sediment and reduces the measurement accuracy. Moreover, it causes a great impact on the transducer, making it easy to Damage; (2) The equipment is controlled by the deck unit to work on the seabed through the communication cable, and the collected acoustic data is transmitted back to the deck unit in real time through the cable, which increases the requirements for the ship carrying the equipment (the ship must be equipped with an armored cable), Increase the cost of offshore surveys; (3) The equipment is only suitable for softer seabeds. When the bottom of the seabed is hard, it is difficult to insert into the sediment, resulting in measurement failure and reduced work efficiency

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