A deep-sea long-life electric field sensor

An electric field sensor, deep-sea environment technology, used in instruments, measuring electrical variables, manufacturing measuring instruments, etc., can solve the problems of limited long-term stability of electrodes, easy reduction of stability and sensitivity, internal electrode pollution, etc., and achieve stable electrode stability. Potential, prevent electrode potential drift, good stability

Active Publication Date: 2019-08-30
QINGDAO UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is still a liquid junction potential inside the electrode, and there is pollution to the inner electrode. Its stability and sensitivity are easily reduced in a high hydrostatic pressure environment, resulting in mismeasurement
[0006] The silver / silver halide reference electrode prepared by Li Jiao’s powder pressing method has good short-term stability, with a range between 0.4-0.8mV, but it takes about a week for the electrode to reach stability after being placed in seawater for a long time, with a range of 0.7-0. Between 0.8mV
The long-term stability of this electrode limits its application

Method used

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  • A deep-sea long-life electric field sensor
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Effect test

Embodiment 1

[0021] Embodiment 1: the present invention will be further described below in conjunction with accompanying drawing example:

[0022] combine figure 1 . One end of the electrode lead wire 1 is connected together with the pure silver column 6 embedded in the upper surface of the cylindrical inner electrode core body 7 of silver / silver chloride powder pressing and sintering through the solder joint 5, and the inner electrode core body 7 is placed on The middle part of the electrode sleeve 9 is fixed with epoxy sealing filler 4, and the inner electrode core 7 is required to expose the lower surface, and the remaining surface is sealed with epoxy sealing filler 4; after the other end of the electrode lead 1 passes through the epoxy sealing filler 4 Pass through the upper opening of the electrode sleeve 9 and pass through the through hole of the electrode fixing sealing sleeve 3 to extend outside the main body of the reference electrode as a signal interface for connecting monitor...

Embodiment 2

[0023] Embodiment 2: Preparation of nano-silver chloride powder.

[0024] Pure AgNO will be analyzed at room temperature 3 and NaCl powder in a ball mill at a weight ratio of 1:1.2 for programmed pulverization and ball milling for 50 minutes to obtain nano silver chloride powder.

Embodiment 3

[0025] Example 3: Pressing and calcining the inner electrode core.

[0026] Nano-silver and nano-silver chloride powder are mixed with 2% by mass of binder to granulate according to the weight ratio of 1:1.72, the pressing pressure is 10MPa, and sintering at 210°C after molding.

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Abstract

The invention provides an electric field sensor suitable for a deep-sea environment. The electric field sensor comprises a protective shell, and an inner electrode core and a filter element arranged inside the shell from top to down. The electric field sensor is characterized in that the filter element is a diatom ceramic cylinder, the inner electrode core is formed by pressing and calcining nano silver and nano silver chloride powder and graphene slurry, the upper end of the inner electrode core is sealed and filled with epoxy resin, an electrode wire is led out of the shell from the upper end of the inner electrode core, via a solder joint and through the epoxy resin sealing filler, the inner electrode core is fixed to a fixed sealing sleeve at the upper end of the protective shell, the diatom ceramic cylinder and the protective shell are arranged in sequence outside, the other side of the protective shell is connected with the external environment, and the protective shell is equipped with a fixed pressure cap at the bottom. The electric field sensor can be applied to electric field signal detection and automatic equipment probe control in deep-sea oil pipelines, deep-sea communication cables, and deep-sea detection equipment. The electric field sensor has the advantages of simple structure, stable performance, high sensitivity, long life, and the like, and has a good application prospect.

Description

technical field [0001] The invention relates to an electric field sensor, in particular to a long-life electric field sensor which can be stably used in deep sea environment. Background technique [0002] With the development of oceanography, the detection of ocean electric field has become an important high-tech in ocean science research, and it is widely used in deep-sea oil pipelines, deep-sea communication cables, and deep-sea exploration. Because the electric field signal in the ocean is very weak, the development of a high-sensitivity, low-noise ocean electric sensor has become one of the important research contents of ocean electromagnetic detection. At present, the sensor probes used for marine electric field detection are mainly all-solid Ag / AgCl electrodes. The detection aspect stands out and is widely used in the preparation of marine electric field sensors. [0003] In addition to the characteristics of general noble metal nanoparticles such as quantum size eff...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R3/00
Inventor 李昉钟华张慧王国蕊
Owner QINGDAO UNIV OF SCI & TECH
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