Seabed combustible ice detector and detection method thereof

Abstract

The invention discloses a seabed combustible ice detector comprising an optical fiber a and an optical fiber b. One end of the optical fiber a is provided with a light transmission port a, and the other end of the optical fiber a is connected with a beam expander. One end of the optical fiber b is connected with a laser, and the other end of the optical fiber b is connected with a light transmission port b. The seabed combustible ice detector also comprises a shell. The top part of the shell is provided with a field diaphragm. The shell is internally provided with a Fresnel lens, an interference light filter, an imaging lens and a CCD camera which are arranged from the top to the bottom in turn. The detection method comprises the following concrete steps: step 1, the target information ofthe seabed is acquired; step 2, two spectral lines are selected from the imaging interference fringes obtained on the CCD camera in the step 1, the light intensity of the spectrum is detected on the CCD camera and the relative intensity S of the spectral lines is acquired from an HITRAN synthetic spectrum database; and step 3, the temperature, the pressure intensity and the molecular number density of the combustible ice, i.e. the characteristic parameters of the combustible ice, are calculated according to the light intensity and the relative intensity S of the spectral lines acquired throughthe step 2. Higher frequency and more accurate position determination of seabed combustible ice detection can be realized.

Description

technical field [0001] The invention belongs to the technical field of detectors, and relates to a detector for combustible ice on the seabed, and also relates to a detection method of the detector. Background technique [0002] At present, the methods commonly used in the world to detect combustible ice include: geophysical method, seismic survey method, marine controlled electromagnetic prospecting method, logging core analysis method, seabed visual detection method, geochemical prospecting method, etc. Among them, seismic processing and imaging techniques in geophysical methods are most widely used. In marine exploration, the seismic pseudo-bottom simulating reflection layer BSR (Bottom Simulating Reflection) is often used as a sign of the presence of combustible ice [1,2] . Geophysical method and AVO (Amplitude Versus Offset) analysis technology [3] , Velocity field establishment technology (using the difference in propagation speed of seismic waves in combustible ice...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a detector for combustible ice on the seafloor,

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