Deep sea underflow change observation device based on differential pressure measurement
A pressure difference measurement and observation device technology, which is applied in the field of observation devices to realize the change of depositional state of sedimentary layers by deep seabed currents, can solve the problems of changing high and low, unable to measure the excess pore pressure value, etc., and achieve the effect of improving adaptability
Active Publication Date: 2018-03-16
OCEAN UNIV OF CHINA
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Problems solved by technology
[0005] However, the ever-changing submarine bottom current will cause erosion and siltation at the observation point, that is, the seabed surface will become higher and lower with the action of the bottom current.
The sensors buried in shallow sediments will be completely buried sometimes and exposed on the seabed surface as the seabed changes, which will bring a lot of inconvenience to the measurement of excess pore pressure, and even make it impossible to measure the excess pore pressure. pressure phenomenon
The current pressure observation devices still have many deficiencies in overcoming the influence of environmental dynamic changes
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[0027] The present invention will be described in further detail below in conjunction with specific embodiments and accompanying drawings.
[0028] Such as figure 1 , figure 2 As shown, the deep seabed current change observation device based on differential pressure measurement includes a differential pressure sensing cabin 3, a base 8, a controller 5, and a release device 2 for the upper floating body 4, and the connection between the differential pressure sensing cabin 3 and the base 8 is through a connection, the controller 5 is set inside the connecting part, the upper floating body 4 is located on the differential pressure sensing cabin 3 and retracted through the release device 2; the release device 2 is arranged between the upper floating body 4 and the differential pressure sensing cabin 3; the differential pressure sensor The test cabin 3 includes a hydrostatic pressure chamber 11 and an environmental water pressure chamber 12. The top of the environmental water pre...
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The invention relates to a deep sea underflow change observation device based on differential pressure measurement. The deep sea underflow change observation device comprises a differential pressure sensing cabin, a base, a controller and a floating body releasing device. The differential pressure sensing cabin and the base are connected through a connection portion; the controller is arranged inthe connection portion; a floating body is arranged in the differential pressure sensing cabin and is released by the releasing device; and the releasing device is arranged between the floating body and the differential pressure sensing cabin. The differential pressure sensing cabin comprises a hydrostatic pressure cabin and an environmental water pressure cabin. The top portion of the environmental water pressure cabin is communicated with the hydrostatic pressure cabin, and the communicated place is blocked by a spring sheet. The spring sheet is internally provided with an optical fiber sensor. The hydrostatic pressure cabin is always communicated with sea water. The environmental water pressure cabin is always communicated with the water in a sea-bottom deposition layer. The releasing device comprises an electric capstan. The electric capstan is provided with an acoustic signal device. The base is provided with a soil pressure sensor and a counterweight member. The optical fiber sensor, the acoustic signal device and the soil pressure sensor are connected with the controller; and differential pressure of a place can be measured based on feedback of each sensor. The device can reduce the influence of deep sea underflow, and can observe changes of seabed underflow more accurately.
Description
technical field [0001] The invention relates to the technical field of ocean observation, in particular to an observation device for realizing the change of the deposition state of a sediment layer by deep seabed currents. Background technique [0002] Abyssal currents are a common geological phenomenon, and the seabed transportation deposits caused by them are a relatively common sedimentary form. The sediments of abyssal currents are often composed of fine clastic sediments, volcanic materials or siliceous deposits. The structure is also characterized by common horizontal fine bedding. Bottom current transported sediments have a significant impact on seabed and topographic reconstruction, combined with the state of bottom current sediment movement obtained by geological drilling, it is of great guiding significance for the study of the evolution process of deep-sea geological structures. By observing the dynamic change process of the excess pore pressure value of the shal...
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IPC IPC(8): G01V9/00
CPCG01V9/00
Inventor 刘涛魏冠立郭磊柴万里
Owner OCEAN UNIV OF CHINA