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A sound wave acquisition and deep-sea technology, applied in the marine field, can solve problems such as unfavorable correlation analysis and difficulty in synchronously recording sound signals of multiple frequencies, and achieve the effect that is conducive to transportation and maintenance
Inactive Publication Date: 2017-06-30
SECOND INST OF OCEANOGRAPHY MNR
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It is impossible to conduct comprehensive monitoring of submarine geological activities, water body activities, and biological activit
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Embodiment 1
[0023] The deep-sea acoustic wave acquisition device of this embodiment includes a pressure-resistant watertight cabin 13, a transducer mounting frame 17 and an acoustic release device 19, and the transducer mounting frame 17 is fixedly installed with three groups of hydrophones with responses in different frequency bands through stainless steel hoops : low frequency omnidirectional hydrophone 14, medium frequency omnidirectional hydrophone 15 and high frequency omnidirectional hydrophone 17. The three groups of hydrophones are respectively connected to the watertight cable through the 8-core first watertight seat 10, the second watertight seat 11 and the third watertight seat 12, and the signals are connected to the electronic system in the pressure-resistant watertight cabin 13 for processing.
[0024] The interior of the pressure-resistant watertight cabin 13 is installed with building block aluminum frames for acoustic and electrical signal processing, storage circuit board...
Embodiment 2
[0028] The deep-sea acoustic wave acquisition method of the present embodiment comprises the following steps:
[0029] Step 1: Device connection and debugging
[0030] 1.1 Check whether all parts of the device are firm and not damaged;
[0031] 1.2 Connect the pressure-resistant watertight cabin, transducer bracket, acoustic releaser, and weight;
[0032] Step 2: Device launch
[0033] 2.1 Find a flat placement area on the back deck of the ship, and place the devices in order;
[0034] 2.2 Turn on the device before arriving at the predetermined delivery position, and when the ship is towed to the predetermined position, quickly release the heavy block, so that the device falls freely to the predetermined operation position;
[0035] Step 3: Installation work
[0036] After the device is put into the water, it starts to collect data, and the data is stored in FLASH;
[0037] Step 4: Device Recovery
[0038] After a period of operation, the deck control unit sends a comman...
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Abstract
The invention discloses a deep sea sound wave acquiring device and a method. The device comprises a pressure withstanding watertight cabin, a transducer mounting rack, a seafloor base and an acoustic release. The pressure withstanding watertight cabin and the transducer mounting rack are both fixedly arranged on the seafloor base. The acoustic release is fixedly chained on the seafloor base through anchor chains. The releasing end of the acoustic release has a weight block fixed through the anchor chains. The pressure withstanding watertight cabin is sealed therein with a high precision time-clock source, a battery and its management system, a data storage unit, a controller, a digital signal processing unit, an analog digital conversion unit, a low-frequency signal pre-processing unit, a middle-frequency signal pre-processing unit, and a high-frequency signal pre-processing unit. The device and the method of the invention can be applied to record sound waves of different frequency bands on a deep sea, and are suitable to acquire the sound wave signals that are broadcast via the two media of both water body and the seafloor. Therefore, sound wave responses from seafloor geological activities, water body activities and biological activities can be recorded, making the device and the method widely applied in maritime investigation and research.
Description
technical field [0001] The invention relates to the field of marine technology, in particular to a deep-sea acoustic wave acquisition device and method. Background technique [0002] The ocean area accounts for more than 70% of the earth's area, and ocean changes have profoundly affected the earth and the human living environment. The deep-sea ocean with a seawater depth of more than 3,000 meters accounts for about 89% of the total ocean area. Seabed geological activities, water body activities, and biological activities are important aspects of deep-sea research. Acoustic signals are an important means of understanding the earth's internal structure, geological features and utilizing deep sea resources. At present, human beings' understanding of the deep sea is still very limited, especially the understanding of deep seabed geological activities, water body activities, and biological activities. [0003] Existing deep-sea detection methods mainly use single-target detecti...
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