High-sensitivity electric field sensor formed by polyamine molecule modified carbon fibers

Abstract

The invention discloses a high-sensitivity carbon fiber electric field sensor. The sensor has high-sensitivity response to an electric field signal in water. According to the sensor, carbon fibers aretaken as an electrode material; grafting and modifying are performed through a polyamine molecular substance; cutting and fixing, lead leading out and sealing are performed, so that the sensor can beprepared. The surfaces of the carbon fibers contain rich active nitrogen-containing groups, and surface double-electric-layer change caused by external electric field change can be converted into electric signals. The carbon fiber electric field sensor has the advantages of high sensitivity, small potential drift and low noise, and can be effectively used for measuring low-frequency weak electricfield signals in waters such as oceans or rivers.

Description

technical field

[0001] The invention relates to a carbon fiber sensor, in particular to a structural design and preparation method of a high-sensitivity carbon fiber electric field sensor for detecting underwater electric fields. Background technique

[0002] The ocean not only contains rich oil, gas and mineral resources, but also provides a vast space for human beings.

[0003] With the emphasis on the ocean and the development of marine and earth science and technology, human beings are increasingly exploiting seabed resources, and marine electromagnetic methods have also become an important means for human exploration and development of the seabed. However, due to the special environment of the ocean, the electromagnetic field in the ocean is dominated by extremely low-frequency weak signals. Therefore, preparing a high-sensitivity, high-stability, and low-noise marine electric field sensor for low-frequency weak signals has become one of the important research contents...

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