A two-dimensional electromagnetic and acoustic integrated speed sensor for ship speed measurement

Abstract

A two-dimensional electromagnetic and acoustic integrated speed measurement sensor for ship speed measurement, including an integrated sensor head, a rod body, an end cover, a mounting plate, an eyebolt screw, and an electrical connector, and the integrated sensor head includes an electromagnetic sensor and an acoustic transducer Two pairs of electrodes are arranged on the end face of the electromagnetic sensor, and the Faraday electromagnetic induction principle is used to realize speed measurement. The two pairs of electrodes simultaneously sense the speed of the ship in the longitudinal and transverse directions. Based on the principle of the Puller effect, it can also sense the speed of the ship in the longitudinal and lateral directions at the same time. By integrating two sensors with different principles, the redundant backup of the speed measurement function can be achieved. Compared with the single sensor, the integrated speed measurement sensor has more comprehensive functions and higher practicability under the same opening size on the bottom of the ship.

Description

technical field [0001] The invention relates to a two-dimensional electromagnetic and acoustic integrated speed measuring sensor used for ship speed measuring. Background technique [0002] In principle, the log is generally divided into hydraulic log, electromagnetic log, Doppler log, etc., each has its advantages and disadvantages from a practical point of view. The hydraulic log is relatively stable at high speed, but the accuracy is poor at low speed; the electromagnetic log is reliable, but easily affected by marine life; the Doppler log has high accuracy, but is easily affected by the air bubbles at the bottom of the ship. At present, ships are generally equipped with two or more principles of log, and the sensor, as an important part of the log, must be in contact with seawater, which increases the number of holes in the bottom of the ship and reduces the safety of the ship. The electromagnetic log uses electromagnetic sensors, and the Doppler log uses acoustic trans...

AI Technical Summary

Problems solved by technology

The hydraulic log is relatively stable at high speed, but poor at low speed; the electromagnetic log is highly reliable, but susceptible to marine organisms; the Doppler log is highly accurate, but easily affected by air bubbles at the bottom of the ship

At present, ships are generally equipped with two or more principles of log, and the sensor, as an important part of the log, must be in contact with seawater, which increases the number of holes in the bottom of the ship and reduces the safety of the ship.

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