CN-121977614-A - Triboelectric multi-target wake flow sensing sensor based on fish side line structure

Abstract

The invention discloses a fish side line structure-based friction electric type multi-target wake flow sensing sensor which comprises a flexible shell, wherein the flexible shell is composed of a shell component, a plurality of groups of sensing unit groove structures are oppositely arranged on the shell component to form a sealing structure with a plurality of hollow cavities, sensing units are arranged in the hollow cavities and are used for converting flow field acting force into corresponding periodic friction sensing electric signals, spinous process arrays are arranged at the bottoms of the sensing unit groove structures, each spinous process array comprises a plurality of hemispherical spinous process structures with the same structure, and the top ends of the hemispherical spinous process structures symmetrically arranged in the hollow cavities are respectively abutted against two end faces of the sensing units. The problems that the traditional underwater sensor depends on external energy supply to cause complex system, high maintenance cost and easy energy exhaustion in long-time monitoring, meanwhile, the resolution and the environmental adaptability are limited in complex underwater scenes, and the external structure is large and difficult to fix underwater are solved.

Inventors

• XU MINYI
• CUI YUXIN
• XU PENG
• LIU JIANHUA
• LI YUANZHENG
• WAN XINGFU
• JIN HAO
• HE WEICHAO
• WANG HONGYU

Assignees

• 大连海事大学

Dates

Publication Date

20260505

Application Date

20260331

Claims (4)

1. 1. The triboelectric multi-target wake flow sensing sensor based on the fish side line structure is characterized by comprising a flexible shell (1) for accommodating a sensing unit (2); The flexible shell (1) comprises shell components (11) which are symmetrically arranged, and the shell components (11) are oppositely provided with a plurality of groups of sensing unit groove structures (12) to form a sealing structure with a plurality of hollow cavities; the sensing unit (2) is arranged in the hollow cavity; The sensing unit (2) comprises a composite material electrode (21), a first CPP film (22), a second CPP film (23), a first FEP film (24) and a second FEP film (25), wherein the composite material electrode (21) is attached to the surfaces of the first FEP film (24) and the second FEP film (25) through a screen printing technology, and the first CPP film (22) and the second CPP film (23) are used for realizing structural support and electrostatic shielding; The first CPP film (22) and the second CPP film (23) are symmetrically arranged on two sides of the composite electrode (21), the first FEP film (24) is arranged between the first CPP film (22) and the composite electrode (21), and the second FEP film (25) is arranged between the second CPP film (23) and the composite electrode (21) so as to form a contact separation structure with the composite electrode (21); The sensing unit (2) is used for converting the acting force of the flow field into a corresponding periodic friction sensing electric signal; The bottom of each sensing unit groove structure (12) is provided with a spinous process array (13) for enhancing the contact effect of the sensing unit under the action of different target wake flow fields so as to improve the triboelectric effect, the spinous process array (13) comprises a plurality of hemispherical spinous process structures (131) which are uniformly distributed and are identical in structure, and the top ends of the hemispherical spinous process structures (131) which are symmetrically arranged in the hollow cavity are respectively abutted against two end surfaces of the sensing unit (2).
2. 2. The fish side line structure-based triboelectric multi-target wake sensing sensor according to claim 1, wherein the composite electrode (21) is a conductive ink electrode doped with mixed carbon nanotubes; The surface materials of the first FEP film (24) and the second FEP film (25) are any one of insulators and semiconductors.
3. 3. A triboelectric multi-target wake-up sensor based on a fish side line structure according to claim 2, characterized in that the flexible housing (1) is made of silica gel.
4. 4. A triboelectric multi-target wake sensing sensor based on a fish side line structure according to claim 3, wherein a plurality of hollow cavities are arranged in the flexible housing (1) at equal intervals, and under the action of no wake flow field, the center lines of the hollow cavities are in line coincidence.

Description

Triboelectric multi-target wake flow sensing sensor based on fish side line structure Technical Field The invention relates to the technical field of bionic sensors, in particular to a triboelectric multi-target wake sensing sensor based on a fish lateral line structure. Background Currently, the development of ocean resources and the environmental protection demands are increasingly improved, and the functions of underwater flow field monitoring in the fields of ocean engineering, ecological protection, marine product cultivation and the like are more and more critical. However, the conventional underwater sensor relies on external energy such as a battery or a cable, thus not only increasing the complexity and maintenance cost of the system, but also having the risks of energy exhaustion and pollution to the aquatic organism environment, and the resolution and adaptability of the sensor are limited in the complex underwater environment, and the external structure of the friction nano generator is difficult to fix underwater, so that the conventional sensor is easy to accurately measure the flow velocity and flow direction due to signal distortion or drift, and a sensing scheme which does not need external power supply, is environment-friendly and has strong adaptability is needed. Disclosure of Invention The invention provides a triboelectric multi-target wake flow sensing sensor based on a fish lateral line structure, which aims to overcome the technical problems. In order to achieve the above object, the technical scheme of the present invention is as follows: a triboelectric multi-target wake sensing sensor based on a fish side line structure comprises a flexible housing for accommodating a sensing unit; The flexible shell comprises shell components which are symmetrically arranged, and a plurality of groups of sensing unit groove structures are oppositely arranged on the shell components to form a sealing structure with a plurality of hollow cavities; The sensing unit is arranged in the hollow cavity; the sensing unit comprises a composite electrode, a first CPP film, a second CPP film, a first FEP film and a second FEP film, wherein the composite electrode (21) is attached to the surfaces of the first FEP film and the second FEP film through a screen printing technology, and the first CPP film and the second CPP film are used for realizing structural support and electrostatic shielding; the first CPP film and the second CPP film are symmetrically arranged on two sides of the composite electrode, the first FEP film is arranged between the first CPP film and the composite electrode, and the second FEP film is arranged between the second CPP film and the composite electrode so as to form a contact separation structure with the composite electrode; The sensing unit is used for converting the acting force of the flow field into a corresponding periodic friction sensing electric signal; The bottom of each sensing unit groove structure is provided with a spinous process array for enhancing the contact effect of the sensing unit under the action of different target wake flow fields so as to improve the triboelectric effect, the spinous process array comprises a plurality of hemispherical spinous process structures which are uniformly distributed and are identical in structure, and the top ends of the hemispherical spinous process structures which are symmetrically arranged in the hollow cavity are respectively abutted against the two end surfaces of the sensing unit. Further, the composite electrode adopts a conductive ink electrode doped with mixed carbon nano tubes; The surface materials of the first FEP film and the second FEP film are any one of insulators and semiconductors. Further, the flexible shell is made of silica gel. Furthermore, a plurality of hollow cavities are arranged in the flexible shell at equal intervals, and under the action of no wake flow field, the center lines of the hollow cavities are in straight line coincidence. The invention has the beneficial effects that the invention provides the triboelectric multi-target wake sensing sensor based on the fish side line structure, the flow speed, the incoming flow direction and the environmental disturbance of the underwater flow field can be stably sensed, the sensor is combined with the friction nano power generation technology to realize autonomous energy supply, the array deployment of the multi-sensing unit is used for coping with complex ocean environments, the hemispherical spinous process structure is arranged on the inner surface of the sensing unit groove and is used for enhancing the response effect of the sensing unit to the water flow effect, the sensing sensitivity is improved to accurately capture the tiny change of the flow field, the contact separation is realized through the friction nano power generation effect in the sensing unit, the mechanical deformation is converted into the electric signal, the process corresponds t