21 results about "Magneto elastic" patented technology

The application discloses a magnetoelectric flexible tactile sensor, which comprises a magnetoelastic body, a support part, a flexible circuit board, a recess part and a magnetic field sensor, the recess part is located above the support part, the magnetoelastic body is aligned with the recess part, the magnetic field sensor is located on the flexible circuit board and between the support part and the flexible circuit board, the magnetoelastic body is used for generating a corresponding magnetic field distribution according to an external contact pressure, and the magnetic field sensor is used for collecting a magnetic field signal of the magnetoelastic body, wherein a lower part of the magnetoelastic body in contact with the recess part is a pyramid array structure. Through the magnetoelectric flexible tactile sensor, the structure of the magnetoelastic body is pyramid-shaped, the sensitivity of the flexible tactile sensor is improved, and the tactile information on the tactile sensor is directly obtained by pre-training a convolutional neural network to process the magnetic field signal.

The invention provides a magnetoelastomer and a preparation method thereof. The magnetoelastomer comprises a first magnetoelastomer film layer, a second magnetoelastomer film layer and a middle elastic layer, wherein each of the first magnetoelastomer film layer and the second magnetoelastomer film layer comprises an elastic matrix and magnetic powder particles dispersed in the elastic matrix. According to the magnetoelastic body, through the structural design of three-dimensional directional arrangement of the magnetic poles, the repulsive force of the same-polarity magnetic poles and the attractive force of the opposite-polarity magnetic poles are utilized, and dynamic compensation of energy loss is achieved when mechanical deformation of materials occurs. The technical effects that the bidirectional hysteresis effect of the magnetoelastomer in the longitudinal compression direction and the transverse stretching direction is remarkably reduced, the rebound resilience and the reversible deformation capacity of the material are improved, and the problem of performance degradation of the magnetoelastomer under long-term dynamic / static load is solved.

The invention provides a micro-gripper and a preparation method of the micro-gripper. The micro-gripper comprises a body part, the magnetic field generating unit is arranged on the body part and is used for generating a gradient magnetic field; the clamping part comprises a driving mechanism which is made of a magnetic elastic material and is configured to have two discrete stable balance positions, can be switched between the two stable balance positions under the action of the gradient magnetic field and is kept at the current stable balance position when the gradient magnetic field is lost; the at least two flexible clamping jaws are made of a non-magnetic soft polymer material, the at least two flexible clamping jaws are symmetrically arranged on the two sides of the driving mechanism, each flexible clamping jaw is provided with a first end and a second end which are oppositely arranged, the first ends are arranged on the driving mechanism, the at least two second ends are oppositely arranged, and a clamping space used for clamping an object is formed; the driving mechanism and the at least two flexible clamping jaws are located in the same plane, and the driving mechanism and the at least two flexible clamping jaws are integrally formed.

The application provides a magnetic control soft gripper, characterized in that a magnetic control gripper comprises a coil, a soft magnetic elastic body, a hard magnetic elastic body, a plastic film and a magneto-rheological fluid; the soft magnetic elastic body is shaped as a U shape and has a rectangular cross section; the hard magnetic elastic body is tightly attached to the outer side edge line of the soft magnetic elastic body; the coil is wound around the surface of the soft magnetic elastic body and fixedly connected to the soft magnetic elastic body; the plastic film is attached to the inner side edge line profile of the soft magnetic elastic body and forms a closed space with the soft magnetic elastic body, and the space is filled with the magneto-rheological fluid; by controlling the energization direction of the coil, the soft magnetic elastic body, the hard magnetic elastic body and the magneto-rheological fluid form different magnetic circuits, so that the end of the gripper is elastically deformed; the magneto-rheological fluid is attached to the surface of an object and solidified under the action of a magnetic field, so that the adhesion is enhanced; and the two cooperate with each other to complete the clamping action. The soft gripper provided by the application is convenient to control and has high efficient grabbing capacity.

The invention provides a preparation method of a magnetoelastomer, which comprises the following steps: mixing Fe3O4 magnetic powder with liquid photosensitive resin, applying an external magnetic field to induce to form a Fe3O4 magnetic powder-resin pre-structured system, doping NdFeB magnetic powder-resin into the Fe3O4 magnetic powder-resin pre-structured system to realize high dispersibility and anti-sedimentation stability of the magnetic powder, and preparing the magnetoelastomer by using a photocuring printer. And the magnetoelastic body is printed, so that the force-magnetism conversion efficiency of the magnetoelastic body is remarkably improved.

The invention relates to a cereal grain flow monitoring method based on a cereal grain flow monitoring device, and the method comprises the steps: obtaining a three-dimensional force vector sequence, the three-dimensional force vector sequence comprises a three-dimensional force vector of each moment in a plurality of moments in a time window used for monitoring the cereal grain flow, and the three-dimensional force vector of each moment in the time window used for monitoring the cereal grain flow is obtained in the cereal grain transportation period; the stress plate is stressed by a force related to cereal grains, so that the magnetoelastomer monomer is stressed, the magnetoelastomer monomer is deformed due to the stress of the magnetoelastomer monomer, the magnetic field of the magnetoelastomer monomer is changed due to the deformation of the magnetoelastomer monomer, and the magnetic field array acquisition circuit outputs a three-dimensional force vector according to the magnetic field change of the magnetoelastomer monomer; for each three-dimensional force vector in the three-dimensional force vector sequence, synthesizing forces in all directions in the three-dimensional force vector into a single-valued impact strength index corresponding to the three-dimensional force vector to obtain a single-valued impact strength index sequence; and determining a grain grain flow prediction result according to the single-valued impact strength index sequence.

A kind of magnetic drive shell dot matrix pipe crawling soft robot and method, belong to the field of robot, in the robot: front and rear anchoring components are located in the two sides of magnetic spring, the tail of front anchoring component is connected with magnetic spring by front connecting ring, the head of rear anchoring component is connected with magnetic spring by rear connecting ring;Front constraint ring is connected with the head of front anchoring component, rear constraint ring is connected with the tail of rear anchoring component. Front, rear anchoring component, magnetic spring are by the integrated shell dot matrix structure of soft material with magnetism, when being placed in the magnetic field space generated by magnetic field generator, the magnetic field generated by magnetic field generator can drive it to generate active deformation. The soft robot of the application realizes crawling movement in pipe by the coordinated deformation of integrated dot matrix structure with magnetism composed of magnetoelastic body under magnetic field excitation, is completely composed of soft material, and can crawl in flexible pipe;Robot is driven to crawl by magnetic field wirelessly, does not need to carry air pipe and wire in the process of crawling.

The invention provides a high-resilience magneto-elastomer composite structure and a preparation method thereof, the high-resilience magneto-elastomer composite structure comprises a first magneto-elastomer and a second magneto-elastomer which are laminated, and the first magneto-elastomer layer has a first magnetization direction; the second magnetoelastic body has a second magnetization direction; the included angle between the first magnetization direction and the second magnetization direction is smaller than 180 degrees; wherein the first magnetoelastomer and the second magnetoelastomer are made of porous materials. According to the elastic pressure sensor, two layers of porous magnetic elastomers with similar structures are stacked together, and recovery is assisted through the magnetic force effect, so that the technical effects of reducing the recovery time of the elastic pressure sensor and improving the recovery rate are achieved.

The invention relates to a safe and environment-friendly court, and belongs to the technical field of sports facilities. The court is formed by laying a composite floor rubber material formed by firmly combining a silicon PU (polyurethane) bottom layer and a modified acrylic acid surface layer, a magnetic elastic filler is introduced into the modified acrylic acid surface layer for blending, and directional curing molding is assisted by magnetic force; according to the magnetic elastic filler, ferroferric oxide serves as a core, an organic silicon crosslinking layer is formed on the surface through chelating enrichment and in-situ crosslinking, uniform microcosmic protrusions are formed on the surface of a surface layer through magnetic force directional enrichment, the excellent rebound resilience of a Pick ball is kept, meanwhile, the skid resistance, rebound uniformity and local impact absorbability of a site are remarkably improved, and the service life of the Pick ball is prolonged. The defect of interlayer adhesive force of multilayer coating of a water-based acrylic acid system is overcome, and the paint is excellent in comprehensive performance and environment-friendly.

The application discloses a kind of multimode intelligent monitoring numerical control machine tool, belong to numerical control machine tool technical field, solve the problem that when high speed / precision / discontinuous cutting, monitoring machine tool environment closed loop coupling, working condition burst sensor distortion, install sensing micro modification structure and induce flutter, both interweave into observation artifact, cause ghost alarm and threshold dilemma.Problems include numerical control machine tool body, and multimode monitoring circuit, the multimode monitoring circuit includes the main control processing unit connected with numerical control controller in numerical control machine tool body, and the distributed injection phase-locked array module connected with main control processing unit, magnetoelastic torque sensor module, plasma impedance sensor module, strain field interference sensor module, thermal birefringence sensor module.The application actively injects multi-physical field excitation and synchronously collects response, real-time decoupling compensation sensing disturbance, output high confidence eigenstate estimation and dynamic self-optimizing parameter, break the measurement disturbance closed loop, reconstruct extreme working condition data credibility.

The present invention provides a string and power generation device that can generate electricity through the vibration of the string, and that are both stretchable and durable. [Solution] A power generation device 1 according to one embodiment comprises a string 10 containing a viscoelastic permanent magnet elastomer, and a coil 2 that generates electricity by the vibration of the string 10.

This invention provides a flexible inductive magnetic pressure sensor, comprising a magnetoelastic body unit, a magnetic sensing unit, and a magnetic rebound unit arranged sequentially from top to bottom, wherein the magnetization directions of the magnetoelastic body unit and the magnetic rebound unit are opposite. This invention also provides a flexible inductive magnetic pressure sensor array. Compared with the prior art, this invention utilizes the mutual repulsive force between the magnetoelastic body unit and the magnetic rebound unit with opposite magnetic poles to achieve rapid rebound of the magnetoelastic body, thereby reducing the hysteresis behavior of the inductive magnetic pressure sensor.

This invention discloses a method and apparatus for intelligent optical surface control of magnetically driven wrinkling instability. The method employs soft intelligent materials to construct a magnetoelastic thin film structure (thin film or thin film-substrate composite structure). Leveraging the unique properties of soft intelligent materials, the critical magnetic field parameters that induce wrinkling instability in the magnetoelastic thin film structure are determined through theoretical calculations. After applying mechanical pre-compression / stretching to the magnetoelastic thin film structure, the magnetic induction intensity of the applied magnetic field is adjusted to achieve intelligent optical control of the surface of the magnetoelastic thin film structure, precisely controlling the dynamic transformation of the surface's optical reflection state. This method enables non-contact, reversible, and programmable magnetic field control of the wrinkled morphology of optical surfaces, overcoming the inherent defects of contact-driven methods, and exhibiting excellent cycle stability. Simultaneously, it allows for customized design and precise control, with a simple overall fabrication process, possessing significant engineering application value.

The application discloses a biosensor based on magnetic field regulation and a preparation method thereof, and belongs to the field of biosensors. The application solves the problem of insufficient sensitivity of the existing biosensor. The technical scheme adopted to solve the technical problem is as follows: a conductive part and a flexible substrate with elasticity are included; a magnetoelastic layer, a GMR sensing layer and a biological recognition layer are sequentially deposited on the flexible substrate; the conductive part is in contact with the GMR sensing layer; the magnetoelastic layer comprises a closed magnetic loop with a serpentine structure; an insulating layer is arranged between the magnetoelastic layer and the GMR sensing layer; a passivation layer is deposited between the GMR sensing layer and the biological recognition layer; the surface of the biological recognition layer is modified with RGD peptide; and the conductive part comprises a top electrode and a bottom electrode, and the top electrode and the bottom electrode both adopt a interdigitated electrode pattern. The application is applied to the biosensor.

Disclosed herein is a device for providing in vivo detection of a target in a bodily fluid. The device may comprise a tubular structure and a differential magnetoelastic-based sensor associated with the tubular structure. The differential magnetoelastic-based sensor may comprise a sensing element comprising a surface, wherein the surface comprises a functional layer on at least a portion of the sensing element surface, and a reference element. Also disclosed are methods for detecting a target in a bodily fluid, system for providing in vivo detection of a target in a bodily fluid, differential magnetoelastic-based sensors having a curved cross-sectional shape, and methods for making a differential magnetoelastic-based sensors having a curved cross-sectional shape.

The application discloses a magneto-electric composite soft material and a preparation method thereof. The magneto-electric composite material comprises a piezoelectric elastomer layer and a magnetoelastic layer. The piezoelectric elastomer layer and the magnetoelastic layer are spin-coated and solidified together to form an integrated structure with a double-layer material. The electrical output and the magneto-electric coupling coefficient of the magneto-electric composite material are controlled by the doping amount of piezoelectric ceramic powder in the piezoelectric elastomer, the amplitude and the frequency of an external magnetic field. The application further discloses a preparation method of the magneto-electric composite material. The preparation method is simple, has a wide application range and low cost, and can be applied to the fields of magneto-electric sensors, flexible robots, energy capturing and self-powered devices.

The invention discloses a three-axis magnetic field surveying and mapping method and system based on magnetostrictive strain modulation optical fiber interference, and the method comprises the steps: preparing a soft magnetic elastomer, coating the surface of a single-mode optical fiber with the soft magnetic elastomer, and obtaining the single-mode optical fiber with a soft magnetic elastomer coating; performing structure processing to form an eggbeater-shaped optical fiber sensing probe; an optical sensing system is built, the eggbeater-shaped optical fiber sensing probe is placed in a magnetic field environment to be detected, optical signals emitted by a light source are detected, and transmission interference spectrums under different magnetic field intensities and magnetic field directions are recorded; extracting the wavelength valley offset of the resonant wavelength, and calculating the three-axis component of the magnetic field to be detected based on the preset corresponding relation between the wavelength valley offset and the magnetic field intensity and the magnetic field direction; surveying and mapping of the three-axis magnetic field are completed. The eggbeater-shaped optical fiber sensing probe provided by the invention is simple in structure, strong in anti-interference capability, high in measurement precision and high in strain transmission efficiency, and improves the three-dimensional surveying and mapping precision and efficiency of a magnetic field in combination with a three-axis component resolving algorithm.

According to the preparation method of the high-magnetic-phase-content magneto-elastomer and the magneto-elastomer, in the process of preparing the magneto-elastomer through photocuring 3D printing, micron-sized light guide fibers are added, a light guide path is constructed in a magnetic powder-resin system, and the magnetic phase content gt is obtained; 50 wt.% of a magnetoelastomer; the technical effect of improving the curing thickness and interlayer bonding quality of the magnetoelastomer is achieved.

The invention provides a sensitive element and a preparation method thereof, and a flexible magnetic sensitive stress sensor and a use method thereof, and belongs to the technical field of stress detection, and the sensitive element comprises a magnetoelastomer and a magnetic sensing unit; the magnetoelastic body is a magnetoelastic microstructure array which is inclined in four directions and has anisotropic magnetic field distribution; the magnetic sensing unit comprises a base and an inductance structure; the bottom of the magnetic elastomer is arranged on the top surface of the base; the inductance structure comprises at least two magnetic induction structures arranged on the periphery of the magnetic elastomer in different directions, and the magnetic induction structures are arranged on the top face of the base. According to the invention, the problem that a sensor capable of realizing high sensitivity and three-dimensional force detection through a simple sensor design is lacked in the prior art can be solved.