Sea ice type identification method based on ship ice-induced vibration

Abstract

The invention discloses a sea ice type identification method based on ship ice-induced vibration, relates to the technical field of sensor detection, utilizes excitation vibration acceleration data generated by ice-ship interaction, is simple in data acquisition mode and convenient to operate, and is not influenced by sea surface visibility and light; the ice-induced vibration data can effectively reflect the impact energy information of the sea ice type; marginal spectrum features obtained through Hilbert transformation can be used for on-ship ice condition measurement of local sea area ice areas, sea ice types in a cabin are recognized, and the defect that a visible light camera and an optical remote sensing satellite are prone to being interfered by cloud and mist and light when collecting sea ice images is overcome; the method comprises the following steps: firstly, installing an acceleration inertial sensor in a cabin of an icebreaker to collect ice-induced vibration data; secondly, preprocessing the data; and finally, identifying broken ice, flat ice and seawater by using marginal spectrum features extracted after Hilbert transformation.

Description

technical field [0001] The invention relates to the technical field of sensor detection, in particular to a sea ice type identification method based on ship ice-induced vibration. Background technique [0002] Sea ice is known as the "white killer". The polar regions and high-latitude seas are covered by sea ice all year round. Severe sea ice freezing will cause serious damage to activities such as fish farming, offshore platform operations, coastal port facility construction, and polar scientific research. On the other hand, it will also pose a threat to ships navigating in ice areas. The sea ice squeezes the hull structure, causing damage and rupture, and even flooding and overturning, causing serious disasters; therefore, countries are currently attaching great importance to the monitoring of sea ice conditions; [0003] In order to obtain sea ice type data, early marine ice investigators could only record it through manual observation and identification methods; with the...

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Problems solved by technology

[0005] In order to solve the deficiencies in the prior art, the present invention proposes a sea ice type identification method based on ship ice-induced vibration; overcomes the defects that visible light cameras and optical remote sensing satellites are easily interfered by clouds and light when collecting sea ice images, firstly through Install the acceleration-inertial sensor in the cabin of the icebreaker to collect ice-induced vibration data; secondly, preprocess the data; finally, use the marginal spectrum features extracted after Hilbert transform to realize the identification of broken ice, flat ice, and seawater;

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