FBG-based full-sea depth self-adaptive high-precision pressure conduction static penetration cone probe

Abstract

The present invention involves an FBG -based all -in -sea adaptation of high -precision pressure conduction static static static tone probe, including the rod and the CPT cone tip.There are also buffer rubber pads and water transmitting stones between the CPT cone tip and the rod connector;The adjacent pressure difference sensor is connected by the mutual locking device to form a multi -order sensor nested structure. When the full range of the low -range sensor is reached, it locks it through the intermoder.The sensor can be measured to protect the range of the sensor, and the optimal accuracy can be obtained under effective measurement, realizing the range and accuracy self -adjustment, which can accurately obtain the mechanical characteristics of the sedimentary sedimentary material of the sea and deep sea.Engineering activities and marine safety defense projects are extremely important.

Description

technical field [0001] The invention relates to the field of testing the mechanical properties of seabed sediments, in particular to an FBG-based full-sea depth self-adaptive high-precision pressure conduction static penetrating cone probe. Background technique [0002] Focusing on the research on in-situ measurement devices for the mechanical properties of seabed sediments, for sea areas shallower than 4000m, there are commercial products for the measurement of mechanical properties of sediments below 1-2m below the seabed surface. For example, Dutch Fugro and Vandenberg companies took the lead in developing marine The static penetration testing equipment has successfully served many marine projects at home and abroad. At present, the CPT with the largest working water depth is GOST developed by MARUM in 2010, and the maximum working water depth is 4000m. [0003] As an emerging sensing technology, the application of fiber optic sensors has unique advantages in the measure...

AI Technical Summary

Problems solved by technology

[0005] If you follow the traditional method of selecting a sensor with a suitable range, it is difficult to decide what kind of sensor to choose for detection. Some people propose to choose according to the range of tens of Kp. However, the current investigation and research on the deep sea environment are very lacking. There is not enough understanding of the distribution and variation of the strength of seabed sediments. Considering that if there are rocks on the seabed, the sensor may be scrapped directly. On the other hand, when the probe penetrates into the water, an overload pressure will be generated, and the overload pressure will also be It may lead to the explosion of the sensor range. At present, there is no device in the world that can realize the mechanical properties of deep seabed sediments in the whole sea.

Images