CN-122015917-A - Triboelectric three-dimensional flow field sensor inspired by lateral line epidermal nerve dome

CN122015917ACN 122015917 ACN122015917 ACN 122015917ACN-122015917-A

Abstract

The invention discloses a triboelectric three-dimensional flow field sensor inspired by a lateral line epidermal nerve dome, which comprises a cylindrical shell, a signal analysis unit, a triggering unit and a plurality of friction sensing units, wherein the friction sensing units are arranged in a hollow cavity along different spatial orientations and comprise an elastic reset part and a friction part, and two ends of the elastic reset part are respectively connected with the inner wall of the cylindrical shell and the friction part. One end of the trigger unit is movably connected with the cylindrical shell, and after being disturbed by the flow field, the trigger unit applies force to the friction sensing unit, so that the friction material layers are contacted and separated to generate an electric signal, and the signal analysis unit receives and analyzes the electric signal. The invention can omnidirectionally sense a three-dimensional flow field, breaks through the limitation of two-dimensional sensing, realizes the direct conversion of mechanical energy and electric signals by means of the friction nano power generation effect, has strong environmental adaptability, can sensitively respond to the change of a high turbulence wake and the flow field, provides multidimensional flow field data for underwater environment monitoring, robot motion control and the like, and assists accurate sensing of the underwater complex three-dimensional flow field.

Inventors

XU MINYI
LI YUCHEN
CUI YUXIN
YU AIQIANG
XU PENG
LIU JIANHUA
MENG ZHAOCHEN
ZHANG KECHENG
XU GENGCHEN
WANG TIANYOU

Assignees

大连海事大学

Dates

Publication Date: 20260512
Application Date: 20260414

Claims (6)

1. The triboelectric three-dimensional flow field sensor inspired by a lateral line epidermal nerve dome is characterized by being arranged on the surface of an underwater vehicle and comprising a cylindrical shell (1) internally provided with a hollow cavity, a signal analysis unit, a triggering unit (2) and a plurality of friction sensing units (3); the friction sensing units (3) are arranged in the hollow cavity along different spatial directions and are respectively connected with the signal analysis unit through independent leads, and each friction sensing unit (3) comprises an elastic reset part (31) and a friction part (32) formed by a plurality of friction material layers; one end of the elastic reset part (31) is connected with the inner wall of the cylindrical shell (1), and the other end is connected with the friction part (32); One end of the triggering unit (2) is movably connected with one end of the cylindrical shell (1) and generates displacement in response to flow field disturbance, so that the other end of the triggering unit, which is arranged in the hollow cavity, is driven to apply acting force to one or more friction sensing units (3), and a plurality of friction material layers are further triggered to contact and separate to generate an electric signal; the signal analysis unit is used for receiving and analyzing the electric signals generated by each friction sensing unit (3) so as to identify parameters of a three-dimensional flow field and/or the motion state of the underwater vehicle; the elastic reset part (31) is used for driving the trigger unit (2) to restore to the initial position through elastic restoring force after the flow field disturbance is finished.
2. The triboelectric three-dimensional flow field sensor inspired by a lateral line epidermal nerve hill according to claim 1, wherein the plurality of friction sensing units (3) at least comprises a first group of friction sensing units for sensing front, back, left and right direction flow fields in a horizontal plane and a second group of friction sensing units for sensing vertical direction flow fields.
3. The side-line epidermal nerve hill inspired triboelectric three-dimensional flow field sensor according to claim 2, wherein the friction part (32) comprises a friction layer (321), a first encapsulation protection layer (322), a second encapsulation protection layer (323) and an integral encapsulation layer; The friction layer (321) is sequentially sleeved with the first packaging protection layer (322), the second packaging protection layer (323) and the whole packaging layer; The friction layer (321) comprises a base electrode layer (321 a), a deformable electrode layer (321 b) and a dielectric friction layer (321 c); The substrate electrode layer (321 a), the deformable electrode layer (321 b) and the dielectric friction layer (321 c) are sequentially stacked, and the deformable electrode layer (321 b) is arranged opposite to the dielectric friction layer (321 c).
4. A triboelectric three-dimensional flow field sensor inspired by a lateral line epidermal nerve mound according to claim 3, characterized in that the triggering unit (2) comprises a dome (21) of hemispherical structure, a flexible sealing sleeve (22) of annular cylindrical shape, an elastic connecting rod (23), a first triggering part (24) for triggering the first set of friction sensing units and a second triggering part (25) for triggering the second set of friction sensing units; Two ends of the flexible sealing sleeve (22) are respectively connected with the circumferential side wall of the dome (21) and the end part of the cylindrical shell (1) in a sealing way; a limit groove (11) is arranged in the hollow cavity of the cylindrical shell (1); One end of the elastic connecting rod (23) is fixed at the center of the dome (21), the rod body is sequentially provided with a first triggering part (24) and a second triggering part (25) along the direction away from the dome (21), and the second triggering part (25) is slidably clamped in the limiting groove (11).
5. The triboelectric three-dimensional flow field sensor inspired by a lateral line epidermal nerve hill according to claim 4, characterized in that the elastic return (31) comprises a plurality of spring posts; the inner wall of the cylindrical shell (1) is provided with a plurality of spring column mounting grooves (12), one end of each spring column is arranged in each spring column mounting groove (12), and the other end of each spring column is fixedly connected with the integral packaging layer.
6. A triboelectric three-dimensional flow field sensor inspired by a lateral line epidermal nerve dome according to claim 3, characterized in that the base electrode layer (321 a) is made of conductive fabric; the deformable electrode layer (321 b) is made of conductive ink; the dielectric friction layer (321 c) is made of FEP film; the first packaging protection layer (322) is made of CPP film; the second packaging protection layer (323) is made of nitrile rubber; the whole packaging layer is made of silica gel materials.

Description

Triboelectric three-dimensional flow field sensor inspired by lateral line epidermal nerve dome Technical Field The invention relates to the technical field of bionic sensors and ocean exploration, in particular to a triboelectric three-dimensional flow field sensor inspired by lateral line epidermal nerve hillock. Background In underwater detection, ocean engineering and robot operation, accurate sensing of the motion state of a flow field and a carrier is a key of task execution. The current mainstream technology relies on acoustic and optical sensors, but the acoustic equipment has obvious limitations of high cost, easy signal interference and unstable performance in complex water areas, the optical equipment is severely dependent on water transparency, the perception capability is drastically reduced in turbid or low light environments, and stable work in wake or high-particle water areas is difficult. Disclosure of Invention The invention provides a triboelectric three-dimensional flow field sensor inspired by a lateral line epidermal nerve dome, which aims to overcome the technical problems. In order to achieve the above object, the technical scheme of the present invention is as follows: The friction electric type three-dimensional flow field sensor inspired by a lateral line epidermal nerve dome is arranged on the surface of an underwater vehicle and comprises a cylindrical shell, a signal analysis unit, a triggering unit and a plurality of friction sensing units, wherein a hollow cavity is arranged in the cylindrical shell, the friction sensing units are arranged in the hollow cavity along different spatial directions and are respectively connected with the signal analysis unit through independent leads, each friction sensing unit comprises an elastic resetting portion and a friction portion composed of a plurality of friction material layers, one end of the elastic resetting portion is connected with the inner wall of the cylindrical shell, the other end of the elastic resetting portion is connected with the friction portion, one end of the triggering unit is movably connected with one end of the cylindrical shell and generates displacement in response to flow field disturbance, so that the other end of the triggering unit is driven to apply acting force to one or more friction sensing units, and further contact and separation of the friction material layers are caused to generate electric signals, the signal analysis unit is used for receiving and analyzing the electric signals generated by the friction sensing units so as to identify parameters of the three-dimensional flow field and/or motion state of the underwater vehicle, and the elastic resetting portion is used for triggering the elastic resetting portion to an initial reset position to the initial position through the elastic reset. Further, the plurality of friction sensing units at least comprise a first group of friction sensing units for sensing front, back, left and right flow fields in a horizontal plane and a second group of friction sensing units for sensing vertical flow fields. The friction part comprises a friction layer, a first packaging protection layer, a second packaging protection layer and an integral packaging layer, wherein the first packaging protection layer, the second packaging protection layer and the integral packaging layer are sequentially sleeved outside the friction layer, the friction layer comprises a base electrode layer, a deformable electrode layer and a dielectric friction layer, the base electrode layer, the deformable electrode layer and the dielectric friction layer are sequentially stacked, and the deformable electrode layer is opposite to the dielectric friction layer. The trigger unit comprises a dome with a hemispherical structure, an annular cylindrical flexible sealing sleeve, an elastic connecting rod, a first trigger part for triggering the first group of friction sensing units and a second trigger part for triggering the second group of friction sensing units, wherein two ends of the flexible sealing sleeve are respectively and hermetically connected with the circumferential side wall of the dome and the end part of the cylindrical shell, a limit groove is arranged in a hollow cavity of the cylindrical shell, one end of the elastic connecting rod is fixed at the center of the dome, the first trigger part and the second trigger part are sequentially arranged on a rod body along the direction far away from the dome, and the second trigger part is slidably clamped in the limit groove. The elastic resetting part comprises a plurality of spring columns, wherein a plurality of spring column mounting grooves are formed in the inner wall of the cylindrical shell, one ends of the spring columns are arranged in the spring column mounting grooves, and the other ends of the spring columns are fixedly connected with the integral packaging layer. Further, the substrate electrode layer is made of conductiv