Measurement device and measurement method of three-dimensional spatial distribution characteristics of ship protective electric field

Abstract

The invention provides a measuring device and measuring method of the three-dimensional space distribution characteristic of a ship protective electric field. The measuring device of the three-dimensional space distribution characteristic of the ship protective electric field comprises data collection components, a parameter correction system and a data processing system. The data collection components comprise a support which is composed of three supporting rods in a mutually orthogonal mode, three accelerometers, three gyroscopes, three GPS receivers, six electric field measuring electrodes and a data collection storage device A, wherein a three-dimensional orthogonal coordinate system is formed by the support, the parts are installed on the support, sensitive axes of the three accelerometers coincide with coordinate axes where the accelerometers are located respectively, sensitive axes of the three gyroscopes are parallel to coordinate axes where the gyroscopes are located respectively, and every electric field measuring electrode in the positive direction and every electric field measuring electrode in the negative direction of each coordinate axis are symmetric about the origin of coordinates. The parameter correction system comprises four GPS receivers and a data collection storage device B. The data processing system carries out processing on collected parameters, and obtains the three-dimensional space distribution characteristic of the ship protective electric field.

Description

technical field [0001] The invention belongs to the technical field of electric field protection, and particularly relates to a three-dimensional space distribution characteristic measuring device for ship protection electric field. The spatial distribution characteristics of the isoelectric field are measured holistically and accurately. Background technique [0002] Ships are made of different metal materials. Due to electrochemical effects, different metals have different electrode potentials in seawater, especially between copper propellers, pipelines, valves, etc. and steel ship hulls. A high potential difference forms a corrosive primary battery and generates a corrosion current. In order to improve the anti-corrosion ability of the ship, the ship will adopt the active cathodic protection system. The surface current density of the protected hull must reach a certain value in order to obtain a good protection effect. The protection current of a large and medium-sized ...

AI Technical Summary

Problems solved by technology

This makes the data of the ship's protective electric field very limited. In addition to measuring at certain azimuths and distances below the ship, it is almost impossible to obtain the data at any distance above, in front of, behind, left, and right of the ship. The electric field vector cannot fully obtain the overall distribution of the ship's protective electric field vector in the entire space

[0013] (2) The position error and attitude error of the protective electric field sensor are large, which greatly reduces the accuracy and authenticity of the electric field measurement

When the protective electric field sensor is deployed on the seabed, it is easily affected by ocean current movement, uneven seabed, human operation factors, etc., and it is difficult to accurately determine the position and attitude of the electric field

Although some protective electric field measurement systems can correct the attitude error of the electric field sensor by means of a magnetic compass, and correct the position error by measuring the length of the cable, etc., these correction methods cannot achieve high accuracy, and the residual error is still large, which will be greatly affected. Affects the accuracy and authenticity of measurement data

[0014] (3) The auxiliary system is complex and costly

In particular, the photoelectric composite cable for transmitting measurement data and the shore station or measurement ship for receiving and processing data have complex structures, high process requirements, and high cost

[0015] (4) Inconvenient operation

The current ship protection electric field measurement methods all need to place the electric field sensor on the seabed, and the position and direction under the water need to be ensured when laying out; (or shore station) is often far away, the connection workload is large, and the cost is high; finally, the target ship needs to cooperate with the operation to make it berth or pass the underwater measuring body at a uniform speed at different speeds, which will affect the normal training or operation of the target ship. Routine work, and consumes a lot of labor, energy, time and running costs

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