Automatic protection system of marine gravimeter

Abstract

The invention discloses an automatic protection system of a marine gravimeter. The system comprises an early warning module and an active protection module. The early warning module comprises an active infrared early warning emitter 1, an infrared early warning receiver 1, an active infrared early warning emitter 2 and an infrared early warning receiver 2. The active protection module comprises an air damping mechanical arm 1 and an air damping mechanical arm 2, which are fixedly arranged on a marine gravimeter frame and are arranged oppositely. The early warning module and the active protection module are utilized to carry out all-around protection on a core component, that is, a gravity sensor, of the gravimeter. The system can carry out early warning and timely protection on emergency cases in the gravity measuring process, thereby making up the defect of un-timely response of manual watch, prolonging the service life of the device and greatly reducing economic losses.

Description

technical field [0001] The invention relates to an auxiliary equipment for ocean gravity measurement, in particular to an automatic protection system for an ocean gravity meter. Background technique [0002] A marine gravimeter is a gravimeter installed on a ship or used in a submarine. Under the condition of constant speed and straight line sailing in the ocean, the gravity measurement is carried out continuously. Since the instrument is placed on the moving hull, it is greatly affected by the vertical acceleration and horizontal acceleration and the tilt of the base. The marine gravimeter is a large-scale precision instrument. In order to ensure that the gravity sensor is always in a vertical state and adapt to the working environment of swaying at sea, its sensor is installed in a universally adjustable bucket that can be automatically balanced. The marine gravimeter relies on the vertical and horizontal fiber optic gyroscopes to sense changes in the external motion envi...

AI Technical Summary

Problems solved by technology

The marine gravimeter can work normally within the range of ship rolling 25 degrees and pitching 22 degrees. The offset of the universal adjustment bucket exceeds the rated limit, which will cause the gravity sensor to collide with the gravimeter frame, causing damage to the core components of the instrument

In addition, once a collision occurs, in order to restore the instrument to the vertical state as soon as possible by the torque motor, the large torque electric signal generated by the torque motor will easily cause the instrument to over-correct, thereby causing secondary damage to the instrument

[0003] The marine gravimeter is a large-scale precision oceanographic survey instrument. The severe bumps in transportation and collisions during use will cause deviations in measurement results and damage to sensors.

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