An underwater magnetic sensor

Abstract

The invention belongs to the field of underwater instruments, especially to an underwater magnet sensor which senses a permanent magnet and outputs signals underwater. The underwater magnetic sensor comprises an inductive pedestal, magnetic induction sensors and an underwater conjunction box, wherein each magnetic induction sensor composed of a tongue tube and a sealing cap is mounted on the inductive pedestal. When the permanent magnet approaches, signals sensed by the magnetic induction sensor are gathered into the underwater conjunction box via signal gathering cables, and the gathered signals are output by a signal output cable after junction. The inductive pedestal includes sealing cap fixing holes, cable sealing holes, a magnet through hole and self fixing holes. The signal gathering cables are respectively sealed by sealing parts when penetrating through the inductive pedestal. The underwater conjunction box is composed of a cylinder and end caps at the two sides, the end caps at the two sides are respectively fixed to watertight plugs, cables on the plugs are gathered inside a sealed compartment, and one watertight plug is connected with the signal output cable to output inductive signals. The underwater magnet sensor has the advantages including sensitive induction, reliable sealing performance and selectable operating water depth.

Description

technical field [0001] The invention belongs to the field of underwater instruments and equipment, in particular to an underwater magnetic sensor which induces the action of a permanent magnet underwater and outputs signals. Background technique [0002] With the needs of the development of human society and the advancement of science and technology, the scale of underwater engineering is getting larger and larger, and it is widely used in the fields of underwater resource investigation, offshore oil exploration, rescue and lifesaving, underwater civil engineering construction, and marine military. Types and different functions of underwater instruments and equipment. Therefore, the design and development of underwater instruments and equipment is a common and important work. [0003] In underwater instruments and equipment, it is often necessary to rely on induced magnetic signals to transmit information or perform system control. How to reliably and sensitively induce mag...

AI Technical Summary

Problems solved by technology

This method is generally more effective for the butt joint of two strands of cables, but for the tandem of multiple strands of cables, the effect is not ideal, especially when the water depth and pressure are high, it is easy to enter the water and cause the circuit to be shorted.

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