49 results about "Magneto elastic" patented technology

A magnetoelastic torque sensor system comprising a shaft having at least one axial section magnetized in a circumferential direction; and a magnetic sensor device comprising three or four magnetic sensors; the sensor device being arranged in the vicinity of the shaft; the sensor device comprising a first semiconductor substrate having a processing circuit, a second semiconductor substrate having a first magnetic sensor, and a third semiconductor substrate having a second magnetic sensor (S2), each magnetic sensor configured for measuring a magnetic field component; wherein the first, second and third semiconductor substrates are incorporated in a single packaged device; the system being configured for determining a torque exerted upon the shaft, based on the measured field components, or based on pairwise differences thereof. A method of measuring a torque exerted upon a shaft.

The invention discloses a magnetoelectric flexible tactile sensor which comprises a magnetoelastic body, a supporting part, a flexible circuit board, a concave part and a magnetic field sensor, the concave part is located above the supporting part, the magnetoelastic body is aligned with the concave part, and the magnetic field sensor is located on the flexible circuit board and located between the supporting part and the flexible circuit board. The magnetoelastic body is used for generating corresponding magnetic field distribution according to external contact pressure, the magnetic field sensor is used for collecting magnetic field signals of the magnetoelastic body, and the contact part of the lower part of the magnetoelastic body and the concave part is of a pyramid array structure. According to the magnetoelectric flexible tactile sensor disclosed by the invention, the structure of the magnetoelastomer is pyramid-shaped, the sensitivity of the flexible tactile sensor is improved, and meanwhile, the magnetic field signal is processed through the pre-trained convolutional neural network, so that tactile information on the tactile sensor is directly obtained.

A nonreciprocal microwave transmission device includes a substrate, a transducer on a surface of the substrate and configured to reciprocally convert between electrical signals to acoustic waves, a first piezoelectric material configured to generates and transports acoustic waves from a signal applied to the transducer, and a thin film magnetic material configured to couple to acoustic waves through magnetoelastic coupling so as to have non-reciprocal magnetoelastic coupled acoustic wave transport. Transmission of acoustic waves through the thin film magnetic material is in a direction toward the transducer has a first magnitude and transmission of acoustic waves through the thin film magnetic material in a direction away from the transducer has a second magnitude, the first and second magnitude being significantly different.

The invention discloses a biosensor based on magnetic field regulation and control and a preparation method thereof, and belongs to the field of biosensors. The problem that an existing biosensor is insufficient in sensitivity is solved. In order to solve the technical problem, the technical scheme adopted by the invention is as follows: the sensor comprises a conductive part and an elastic flexible substrate, 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 snakelike structure, an insulating layer is arranged between the magnetoelastic layer and the GMR sensing layer, and the magnetic conductive part is in contact with 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, the conductive part comprises a top electrode and a bottom electrode, and the top electrode and the bottom electrode both adopt interdigitated electrode patterns; the invention is applied to the biosensor.

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 application provides a conformal tactile sensor based on giant magnetoelastic effect and a preparation method thereof, and aims to solve the technical problem that the existing flexible tactile sensor is difficult to realize high-resolution perception of small static force and perfect conformal fitting of a bionic three-dimensional curved surface at the same time. The sensor adopts a multi-layer flexible continuum structure, and the bionic curved surface contact layer with spatial topological texture, the giant magnetoelastic sensing layer with directionally distributed high magnetoelastic material, and the 3D conformal coil excitation and receiving layer based on the flexible printing process are sequentially arranged from outside to inside. The application breaks through the dependence of the traditional magneto-mechanical coupling mechanism on the macroscopic displacement of the elastic body, and innovatively uses the local magnetic permeability mutation caused by the contact stress driving the internal magnetic domain deflection, combined with the active alternating bias magnetic field, to realize the continuous and high-sensitivity capture of the small static clamping force and the dynamic slip signal. The sensor has broad industrialization prospects in the application fields of embodied robots such as underwater operation, fine object grasping and complex human-computer interaction.

The present invention relates to the field of intelligent manufacturing technology, and specifically relates to an intelligent monitoring and optimization system for a suspension mounting plate. The intelligent monitoring and optimization system for a suspension mounting plate includes a multi-scale stiffness monitoring module, a fatigue damage prediction module, a nonlinear stress feedback module, a dynamic load adjustment module, and an intelligent stiffness optimization module. In the present invention, full-scale stiffness monitoring is provided by accurately analyzing the microscopic lattice structure and mesoscopic elastic modulus of the suspension mounting plate. High-precision sensor data is used to accurately calculate changes in stiffness requirements under driving conditions, thereby improving the adaptability of the adjustment scheme. X-ray diffraction and magnetoelasticity measurements are combined to improve the accuracy of fatigue damage prediction. Shape memory alloys and micro-hydraulic actuators are used to quickly adjust the local structure of the force concentration area, optimize stiffness matching, and use adjustable elastic materials and electromagnetic stiffness adjustment to enhance the dynamic adaptability of the suspension to complex working conditions, significantly improving the performance stability and response speed of the suspension system.

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 discloses a numerical control lathe tool abrasion real-time monitoring device, and relates to the technical field of lathe tool abrasion monitoring, the numerical control lathe tool abrasion real-time monitoring device comprises a lathe body and a fixing frame, a three-axis rack is installed on the upper portion of the lathe body, a tool driving end is installed at the adjusting end of the three-axis rack, and a tool is installed at the bottom of the tool driving end; a vibration sensor and a magnetoelastic six-dimensional force sensor are installed on the surface of the vibration sensor, the magnetoelastic six-dimensional force sensor is located at the top of the tool, a fixing frame is fixed to the surface of the three-axis rack, and an industrial camera is fixedly connected to the surface of the fixing frame. According to the invention, in the data acquisition system, a vibration sensor module, a force sensor module and a visual sensor module respectively acquire data in real time at sampling frequencies adapted to the characteristics of each sensor, so that the synchronism and integrity of multi-source signals are ensured; the filtering module carries out targeted filtering according to noise characteristics of the vibration signals and the force signals, characteristic signals in the cutting process are effectively reserved, and the influence of power frequency interference and non-cutting vibration noise is reduced.

The present application relates to the technical field of pipeline crack detection, and is a pipeline crack recognition device and method based on magnetic probe micro-pressure sensing technology. The former comprises at least one set of magnetic probe micro-pressure detection assembly. The latter comprises assembly and debugging preparation, data acquisition and processing, and data analysis and defect recognition. The present application has a reasonable and compact structure. It realizes smooth running and spiral scanning through elastic driving leather bowl and driving short section. The magnetic attraction force is applied to the pipe wall by the micro-pressure information acquisition short section and is converted into a micro-pressure signal. The magnetic elastic effect is used to capture the abnormal magnetic properties caused by hydrogen embrittlement, realize early warning of potential defects and double detection of macroscopic cracks, and effectively avoid missed detection. The micro-pressure data and three-dimensional space coordinates are fused into a detection matrix by a ranging module, an angle acquisition module and a conductive rotary joint, so that the three-dimensional defect map of the pipe wall is accurately reconstructed and the data is standardized stored.

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 present invention relates to a method (10) for operating a sensor system (50) of an electric bicycle (100), wherein the sensor system (50) comprises a torque sensor (55) which is designed as a magnetoelastic sensor and which is configured to determine a torque on a shaft (101) based on the detection of changes in a magnetic field, comprising the steps: detecting (1) a homogeneous magnetic flux density using the torque sensor (55), determining (2) a torque on the shaft (101) using the torque sensor (55), and detecting (3) a torque error of the determined torque when the detected homogeneous magnetic flux density is greater than or equal to a predetermined first threshold value.

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.

A method for operating a sensor system of an electric bicycle is disclosed. The sensor system includes a torque sensor formed as a magnetoelastic sensor and configured to ascertain a torque on a shaft based on a detection of changes of a magnetic field. The method includes (i) detecting a homogeneous magnetic flux density by way of the torque sensor, (ii) ascertaining a torque on the shaft by way of the torque sensor, and (iii) detecting a torque error of the ascertained torque when the detected homogeneous magnetic flux density is greater than or equal to a predetermined first threshold value.

Rear axle steering device (102) comprising at least one control arm, wherein the control arm has at least one elastic bearing (114; 116) for coupling the control arm (108; 112) at least to one wheel carrier (104) and / or to a vehicle body (110), characterized in that the at least one elastic bearing (114; 116) comprises a magnetoelastic and / or electroactive material (206), wherein a control unit (120) is provided to output at least one control signal for the at least one elastic bearing (114; 116) of the control arm (108; 112) in response to a control command in order to increase or decrease an elasticity of the elastic bearing in response to the control signal.

The invention discloses a blood coagulation function and thrombus marker combined detection platform and method, and belongs to the field of blood detection.The detection device comprises a static magnetic field generation structure, a detection coil, a heating assembly and a magnetoelastic sensor, the heating assembly is used for heating a blood sample, and the magnetoelastic sensor is located in the center of the detection coil; the detection coil is electrically connected with the impedance analysis device, current is applied to the detection coil to generate an alternating magnetic field for working of the magnetoelastic sensor, the static magnetic field generation structure is used for generating a static magnetic field for working of the magnetoelastic sensor, and magnetic lines of the static magnetic field are parallel to magnetic lines of the alternating magnetic field. The impedance analysis device drives the detection coil to generate an alternating magnetic field around the magnetoelastic sensor, the magnetoelastic sensor generates resonance in the alternating magnetic field, the detection coil generates an induction signal, the impedance analysis device collects the induction signal, and through the design, joint detection of the thrombus marker and the blood coagulation function can be achieved on a single platform.

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.

The present invention discloses a magnetically controlled snake-scale-like soft actuator, comprising a magnetically controlled snake-scale-like soft actuator body and a magnetic field generator. The magnetically controlled snake-scale-like soft actuator body comprises a series of regularly distributed arc-shaped planar shear marks on a magnetic elastomer sheet. The fan-shaped scales formed by the arc-shaped planar shear marks are mixed with magnetic particles. The magnetic particles are magnetized in a first magnetic field so that all the fan-shaped scales of the magnetically controlled snake-scale-like soft actuator body are programmed to obtain a non-uniform magnetic domain distribution, thereby causing out-of-plane warping and expansion deformation along the length direction in a uniform magnetic field. The magnetic field generator is used to apply a second magnetic field to the magnetically controlled snake-scale-like soft actuator body, causing all the fan-shaped scales of the magnetic elastomer sheet to change from a horizontal state to a curved state with out-of-plane warping, while the magnetically controlled snake-scale-like soft actuator body expands and deforms along the length direction. The present invention also discloses a method for manufacturing the magnetically controlled snake-scale-like soft actuator.

The invention relates to the technical field of intelligent manufacturing, in particular to a suspension mounting plate intelligent monitoring and optimizing system which comprises a multi-scale rigidity monitoring module, a fatigue damage prediction module, a nonlinear stress feedback module, a dynamic load adjusting module and an intelligent rigidity optimizing module. According to the invention, the micro lattice structure and the mesoelastic modulus of the suspension mounting plate are accurately analyzed, full-scale rigidity monitoring is provided, high-precision sensor data are utilized, rigidity demand change in a driving state is accurately calculated, the adaptability of an adjustment scheme is improved, X-ray diffraction and magnetoelastic measurement are combined, the accuracy of fatigue damage prediction is improved, and the fatigue damage prediction precision is improved. The shape memory alloy and the micro hydraulic actuator are used for rapidly adjusting the local structure of a stress concentration area, rigidity matching is optimized, adjustable elastic materials and electromagnetic rigidity adjustment are adopted, the dynamic adaptability of the suspension to complex working conditions is enhanced, and the performance stability and the response speed of a suspension system are remarkably improved.

The invention discloses a reconfigurable magnetic response soft bionic robot and a control method thereof, and the magnetic response soft bionic robot comprises a reconfigurable magnetic elastomer and a magnetic field controller; the reconfigurable magnetic elastomer part is made of an elastomer mixed with magnetic particles, the shape can be designed for multiple times, magnetization is carried out, and therefore the magnetic response soft bionic robot can show different shapes in different driving magnetic fields, and the advancing action of the magnetic response soft bionic robot can be controlled by designing the magnetizing shape; and then a changing magnetic field is designed through a magnetic field controller to drive the magnetic response soft bionic robot to complete advancing actions of simulating inchworm crawling and rolling, and the problems that a traditional soft robot is fixed in magnetization direction, poor in environmental adaptability, single in motion mode and the like are well solved.

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 provides a flexible pressure sensor based on a magnetic field, and a preparation method and a detection method thereof. The flexible pressure sensor based on the magnetic field comprises a gradient magnetoelastomer, a flexible support body, a hard isolation layer and a Hall magnetic sensor, wherein the gradient magnetoelastic body is arranged on the upper side of the flexible supporting body, the hard isolation layer is arranged on the lower side of the flexible supporting body, and the Hall magnetic sensor is arranged on the hard isolation layer. According to the flexible pressure sensor based on the magnetic field and the preparation method and the detection method of the flexible pressure sensor, the problem that an existing flexible pressure sensor based on the magnetic field does not have high sensitivity and wide range at the same time can be solved.

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.

The utility model relates to the technical field of emulsifying machines, in particular to an emulsifying machine stirrer which adopts a magnetic mechanism with the magnetic force direction pointing to the rotating direction of a stirring frame. The magnetic mechanism comprises a fixed permanent magnet block made of a permanent magnet material and arranged on the stirring frame; the magnetic mechanism further comprises a movable permanent magnet block which is connected with a permanent magnet material arranged on the scraper; the stirring frame is provided with an outwards-extending mounting seat for mounting the scraper, and the fixed permanent magnet block is connected to the mounting seat; the fixed permanent magnet block on the mounting seat and the movable permanent magnet block on the scraper on the mounting seat repel each other in magnetic force; the scraper comprises a plate-shaped structure made of an elastic polyethylene material and called as an elastic plate, and the movable permanent magnet block is embedded into the elastic plate; a mounting head matched with the mounting seat is further fixed on the scraper, and the mounting head is rotatably connected to the mounting seat; the stirring frame is provided with a limiting block for limiting the rotating angle of the scraper; the material scraping effect of the scraper is ensured, and the inner wall of the reaction kettle is prevented from being scratched by the scraper.