Submarine cable three-dimensional route measuring method and measuring instrument based on magnetic vector data

A measurement method and magnetic vector technology, which are applied in measurement devices, geophysical measurements, and electrical/magnetic exploration, etc., can solve problems such as the failure of buried depth parameters to be reflected, and achieve the goal of increasing detection, improving efficiency, and improving reference value. Effect

Active Publication Date: 2020-03-31
ZHOUSHAN ELECTRIC POWER SUPPLY COMPANY OF STATE GRID ZHEJIANG ELECTRIC POWER +3
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to propose a submarine cable based on magnetic vector data for the problem that the buried depth parameters that reflect the evaluation of the anti-anchor damage ability of the submarine cable cannot be reflected in the two-dimensional plane routing information of the submarine cable routing detection in the prior art. Three-dimensional routing measuring instrument and measuring method to detect the latitude and longitude coordinates and buried depth of submarine cables

Method used

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  • Submarine cable three-dimensional route measuring method and measuring instrument based on magnetic vector data
  • Submarine cable three-dimensional route measuring method and measuring instrument based on magnetic vector data
  • Submarine cable three-dimensional route measuring method and measuring instrument based on magnetic vector data

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Embodiment 1

[0048] combined with figure 1 with 2 As shown, the three-dimensional submarine cable routing measuring instrument based on magnetic vector data involved in the present invention includes a surface towing body 1, a ship-borne upper computer 3 and a measuring ship (not shown in the figure). The ship-borne upper computer 3 is installed on the measuring ship. Described surface towing body 1 comprises atomic magnetometer 4, three-axis fluxgate magnetometer 5, attitude instrument 6, navigation locator 7, altimeter 8, subordinate computer 9 and non-metallic watertight cabin 10, the non-metallic watertight cabin 10 The outer wall is provided with watertight connectors, the atomic magnetometer 4, the three-axis fluxgate magnetometer 5, the attitude indicator 6, the navigation locator 7, the altimeter 8 and the lower computer 9 are all fixed in the non-metallic watertight cabin 10 by rigid connection , the lower computer 9 is connected to the watertight connector through a cable, and ...

Embodiment 2

[0051] Using the above measuring instruments to measure the three-dimensional route of the submarine cable based on the magnetic vector data, the principle of the method is as follows image 3 As shown, the measurement method includes the following steps:

[0052] 1) Connect the surface towing body 1 with the ship-borne upper computer 3 through a watertight cable 2, place the surface towing body 1 in the water, and place the ship-borne upper computer 3 on the measurement ship, and the measurement ship starts from one end of the submarine cable to tow the surface tow body 1 Move, adjust and maintain the course of the survey ship, so that the surface towing body 1 is always located near the sea cable and moves along the sea cable until t 1 At this moment, the three-axis fluxgate magnetometer detects an alternating magnetic field signal with a frequency of 50 Hz.

[0053] 2.1) The three-axis fluxgate magnetometer 5 measures the three components of the alternating magnetic field,...

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Abstract

The invention relates to a submarine cable three-dimensional route measuring method and measuring instrument based on magnetic vector data. The method is characterized by comprising the following steps that (1) a measuring ship starts from one end of a submarine cable to drag a water surface towed body, the route of the measuring ship is adjusted and kept, the water surface towed body is made to be located near the submarine cable, and a triaxial fluxgate magnetometer tests an alternating magnetic field signal generated by submarine cable power frequency current until the moment t1; 2) based on geomagnetic field total field data B0 and geomagnetic three-component data Bx (t), By (t) and Bz (t) measured by the water surface towed body, longitude coordinates lon1 (t1) and latitude coordinates lat1 (t1) of the water surface towed body, and a real-time vertical height H0 (t1) from the water surface towed body to the seabed, a longitude coordinate lon2 (t1), a latitude coordinate lat2 (t1)and burial depth data d (t1) of the submarine cable are calculated; and 3) a three-dimensional route of the submarine cable is drawn on the three-dimensional coordinate graph according to the longitude coordinate lon2 (t1), the latitude coordinate lat2 (t1) and the burial depth data d (t1) of the submarine cable. The detection of the burial depth of the submarine cable is increased, the referencevalue of the routing information of the submarine cable is improved, and the efficiency of the three-dimensional route measurement of the submarine cable is improved.

Description

technical field [0001] The invention relates to the field of submarine cable operation and maintenance, and relates to a three-dimensional route measurement method and measuring instrument for a submarine cable based on magnetic vector data, which are used to accurately measure the three-dimensional position information of the submarine cable on the seabed. Background technique [0002] Submarine cables are wires wrapped in insulating material and laid on the seabed for power and information transmission. According to the use, it can be divided into power cables, photoelectric composite cables, communication optical cables, etc. In recent years, photoelectric composite submarine power cables (referred to as photoelectric composite submarine cables) have gradually become popular in the fields of power transmission and data communication. This new type of submarine cable combines electric cables and optical cables to transmit power and data at the same time, which not only sa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V3/08
CPCG01V3/081Y02A90/30
Inventor 郑新龙陈国志张磊何旭涛韩幸军孙璐卢正通陶诗洁梁尚清杨国卿
Owner ZHOUSHAN ELECTRIC POWER SUPPLY COMPANY OF STATE GRID ZHEJIANG ELECTRIC POWER
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