165 results about "Electronic skin" patented technology

The invention discloses a flexible pressure sensor based on ionized hydrogel and a preparation method thereof. The sensor adopts a sandwich layered structure of a flexible composite electrode, an ionized water gel dielectric layer and a flexible composite electrode, ionized water gel is used as a dielectric layer, and an upper flexible electrode and a lower flexible electrode are prepared from a multi-walled carbon nanotube / polydimethylsiloxane (MWCNTs / PDMS) composite material; the surface, making contact with the dielectric layer, of the electrode is copied through an abrasive paper template method to form a micron-sized rough structure. Under the action of external pressure, the effective contact area between the microstructure electrode and the ionized water gel dielectric layer and the equivalent electrode distance change, so that the interface electric double-layer capacitance is regulated and controlled, and high-sensitivity conversion from a pressure signal to a capacitance signal is realized. The flexible pressure sensor is simple in structure and excellent in flexibility, can be further integrated into a pressure sensing array, and is suitable for the fields of wearable electronics, electronic skin, man-machine interaction and the like.

The utility model provides a hand-simulated operation device, and relates to the technical field of manipulators, the hand-simulated operation device comprises a plurality of finger-simulated structures used for grabbing a target object, the finger-simulated structures at least comprise fingertip knuckles, and the tops of the fingertip knuckles are special-shaped curved surfaces; an electronic skin is attached to each fingertip knuckle, the electronic skin is arranged to be of a stretchable and bendable flexible structure, and the electronic skin is configured to be capable of generating interactive perception with the target object when the target object is grabbed; the electronic skin is attached to the fingertip knuckles and at least covers the front faces and the tops of the fingertip knuckles. The defect that in the prior art, when a human hand operation simulating device grabs the target object, perceptual information of the target object is not accurate is overcome.

The invention discloses a visual tactile sensor, an electronic skin and a robot, relates to the field of sensors, and is used for improving the comprehensiveness and sensitivity of stress detection. The sensor comprises a magnetic film covering the top surface and the side surface, and the magnetic film is prepared by mixing magnetic powder and silicone rubber; the support supports the magnetic thin film, a magnetic display card and a light source are arranged in the support, the visual touch collector collects magnetic induction data and development data of stress of the magnetic thin film, and then the multi-mode pressure detection model analyzes the stress position and / or the stress size. The stress detection sensitivity is high, comprehensive detection of the top face and the side faces can be achieved, and the detection precision is high.

The invention relates to a flexible electronic skin integrated dust-breath bimodal detection system and detection method. A bimodal sensing module, a signal processing module, a wireless transmission module, a data application module, an abnormity early warning module and a power supply are integrated on a composite flexible substrate; the bimodal sensing module monitors a dust concentration characteristic signal of a working place and a breathing frequency characteristic signal of a worker in real time; the signal processing module receives the signals and carries out noise reduction and data fusion processing to obtain a data set D; the wireless transmission module transmits the data set D to the data application module in real time, performs data real-time display, historical data storage, report generation and data export functions, and supports synchronization to an occupational health management platform; meanwhile, the data application module can process data in the data set D and feed back a processing result to the abnormity early warning module, and the abnormity early warning module correspondingly triggers an early warning signal according to feedback data; according to the invention, the target can be continuously monitored, and a high-precision detection result is obtained.

The invention discloses a TPU film for robot electronic skin and a preparation method of the TPU film, and relates to the technical field of flexible electronic materials, the film takes TPU introduced with Diels-Alder dynamic reversible bonds as a matrix, a conductive filler is formed by dopamine-modified silver nanowires and MXene, the concentration of the conductive filler is in continuous or quasi-continuous gradient decrease, and the conductive filler is a conductive filler formed by silver nanowires and MXene. An integrated network with self-repairing and environmental stability is formed and is used as an electrode; phase change microcapsules and triboelectric nanofibers are compounded in a low-conductivity contact area to form an intelligent response layer which is self-adaptive in sensing threshold and capable of generating power by friction. Through one-step multi-nozzle electrostatic spinning forming, the problem that self-repairing, signal stability, environmental adaptability and energy independence in electronic skin are difficult to consider at the same time is solved.

The invention relates to the technical field of robots, and provides a robot and a safety control method, device and equipment thereof, a storage medium and a product, the robot comprises electronic skin, the electronic skin comprises a first detection unit and a second detection unit, and the method comprises the following steps: responding to an obstacle approaching the robot, and detecting the approaching speed of the obstacle through the first detection unit; in response to the approaching speed being greater than or equal to a preset speed threshold value, controlling the robot to perform obstacle avoidance path planning and / or speed reduction; detecting a contact force and a contact moment of the obstacle through a second detection unit in response to the obstacle contacting the robot; and determining safety braking parameters of the robot based on the approaching speed, the contact force and the contact moment. Safety speed monitoring based on proximity detection and power and force limitation based on contact detection in man-machine cooperation can be achieved at the same time, a dual protection mechanism of proximity sensing and contact sensing of the robot is achieved, and safety is further improved.

The invention discloses a self-powered flexible sensor and a preparation method thereof, and belongs to the field of electronic skin, man-machine interaction, flexible electronic devices and sensors. The invention relates to a cellulose acetate-based ionic gel self-energized flexible sensor which is prepared from cellulose acetate, ionic liquid, a polymer monomer, a cross-linking agent and an initiator and has good mechanical property and antibacterial property, the cellulose acetate enhances the mechanical property of the gel through non-covalent crosslinking, and the ionic liquid plays a conductive role. The flexible sensor has good conductivity, high sensitivity and stability, and can be stretched, twisted and bent. Meanwhile, the high transparency and excellent biocompatibility can be realized, so that the electronic skin can be used as the electronic skin for multifunctional perception and integrated application. The material is environment-friendly, the preparation method is simple, the operability is high, the application field is wide, and the prospect is wide.

The invention relates to a flexible electrode for electronic skin and a preparation method thereof, and belongs to the field of electronic skin. The flexible electrode for the electronic skin disclosed by the invention is prepared from polybenzodifuran diketone, nano metal powder and maleimide modified polyurethane. The flexible electrode disclosed by the invention still keeps excellent conductivity after being repeatedly stretched; meanwhile, the self-repairing performance is achieved, the initial performance of the material can be recovered when the material is damaged, the service cycle of the electronic skin can be prolonged, and the maintenance cost is reduced.

The invention provides an MXene / CNF composite mesoporous fiber material as well as a preparation method and application thereof. The preparation method comprises the following steps: injecting an MXene / CNF spinning solution into an acetic acid coagulating bath, fishing out the MXene / CNF spinning solution, and air-drying the MXene / CNF spinning solution to obtain the MXene / CNF composite mesoporous fiber material, the MXene / CNF spinning solution is a dispersion liquid of nano cellulose and MXene in water. According to the MXene / CNF composite mesoporous fiber material with high conductivity and narrow distribution, the mesoporous structure not only effectively transfers stress, but also contributes to rapid transmission of electrons and ions, has a relatively high application prospect in the fields of electromagnetic shielding, wave absorption, energy storage device electrodes and flexible sensors, and can be widely applied to the fields of electromagnetic shielding, wave absorption, energy storage device electrodes and flexible sensors. And a novel multifunctional platform is expected to be provided for wearable electronic equipment, electronic skin, human body motion monitoring equipment and the like.

The application discloses an electronic skin-oriented conductive silver paste and a preparation method and application thereof, and relates to the technical field of flexible printed electronic materials.The raw materials of the electronic skin-oriented conductive silver paste include flaky silver powder, silver nanoparticles, thermoplastic polyurethane elastomer, acrylic elastomer, PEDOT:PSS microgel dispersion, (3-glycidylpropoxy)trimethoxysilane, polydiallyldimethylammonium chloride, hexanedial modified dopamine copolymer, (3-aminopropyl)triethoxysilane, methacryloyloxypropyltrimethoxysilane, cellulose acetate, modified polyurea thixotropic agent, hydrogenated castor oil, ethylene glycol ether acetate, dibasic acid ester, leveling agent and water.The electronic skin-oriented conductive silver paste has the advantages of good electrical performance, good mechanical-electrical stability, good anti-electromigration and sweat corrosion resistance, and can still maintain dendrite-free and low drift under long-term coupling of sweat and bias, and is suitable for electronic skin.

The invention provides a magnetic sensitive type electronic skin and a using method thereof, and the magnetic sensitive type electronic skin comprises a magnetic elastic body, a magnetic sensor and a signal processing module, the magnetic projectile body comprises a surface structure and magnetic cilia distributed on the surface structure, and the magnetic cilia are used for generating deformation based on external contact force so as to generate a magnetic change signal; the magnetic sensor is used for sensing the magnetic change signal and sending the magnetic change signal to the signal processing module; the signal processing module is used for determining the position and magnitude of the external contact force based on the magnetic change signal. The invention can solve the problem that the existing magnetic sensitive electronic skin cannot realize high-resolution and large-area sensing of the contact position.

The invention relates to a pre-sensing variable-stiffness flexible electronic skin based on time division multiplexing and a cooperative control method thereof, and belongs to the technical field of flexible electronics and robot sensing. Aiming at the core contradiction of magnetic field conflict between a sensing unit and a driving unit in the existing flexible electronic skin, especially the defects of function mutual exclusion between a non-interference environment required by giant magnetoresistance pre-sensing and a high-intensity magnetic field required by magneto-rheological driving and system rigidity increase and flexibility reduction caused by a traditional spatial isolation scheme, the invention provides the flexible electronic skin. The invention provides a cooperative control architecture. According to the architecture, system working time is divided into a sensing window and an execution window which are in high-frequency alternation, and sensing and driving processes which interfere with each other are physically isolated from time; and meanwhile, an event-driven interruption mechanism based on a friction electric signal is introduced, and a continuous high-rigidity mode is forcibly entered during sudden contact. Functional conflicts are solved without magnetic shielding materials, so that the electronic skin keeps excellent flexibility, and cooperative work of pre-sensing and variable stiffness is realized.

The invention discloses a human-simulated robot facial expression mechanism of a multi-degree-of-freedom micro-driver, which comprises a bottom plate, a supporting disc is fixedly arranged at the top of the bottom plate, a bracket is fixedly arranged on the supporting disc, an adjusting assembly is arranged on the bracket, a supporting frame is fixedly arranged at the top of the bracket, a shell is connected to the supporting frame, and a driving device is arranged on the shell. The shell is covered with an electronic skin layer, a limiting block is fixedly arranged in the electronic skin layer, a limiting cylinder corresponding to the limiting block is fixedly arranged on the shell, the limiting block is arranged in the limiting cylinder in a penetrating mode, a frame is fixedly arranged in the supporting frame, and an air pressure mechanism is arranged in the frame. A controller is fixedly arranged on the bottom plate; according to the humanoid robot facial expression mechanism of the multi-degree-of-freedom micro-driver, the air pump can be controlled to work, auxiliary limiting of the electronic skin layer is achieved by means of the limiting block, and therefore the installation stability of the electronic skin layer is effectively improved.

The invention provides a data compression and transmission method for electronic skin of a humanoid robot, belongs to the field of intelligent humanoid robots with bodies, and is used for solving the problems that when large-area electronic skin is applied to the humanoid robot, the data transmission amount is large, the communication rate is low, and the field environment requirement cannot be met. Through the steps of dynamic scanning and acquisition of the electronic skin based on the touch area, data preprocessing, data stroke compression, data differential coding of the non-zero reference value, feature extraction of the touch area and the like, the high compression ratio of the electronic skin terminal to the data is realized, and the data transmission form can be dynamically adjusted; rapid transmission of electronic skin data is achieved, the edge computing capacity of the electronic skin is achieved, and the sensing capacity of the robot body is improved.

The invention belongs to the technical field of flexible electronic sensing, and discloses novel leather-based pressure-sensitive sensing electronic skin and a preparation method thereof. According to the leather-based pressure-sensitive sensing electronic skin, tanning-agent-free leather serves as a base material, and a three-dimensional conductive network is constructed in the tanning-agent-free leather base material, so that pressure-sensitive sensing is achieved. The pressure-sensitive sensing electronic skin provided by the invention completely retains a three-dimensional multi-level fiber network structure of natural leather from micrometer to nanometer, so that when the leather-based pressure-sensitive sensing electronic skin is subjected to external pressure, the collagen fiber can realize cross-scale deformation, thereby realizing wide and sensitive response from tiny pressure to higher pressure, and further realizing the purpose of improving the safety of the leather-based pressure-sensitive sensing electronic skin. And human body motion monitoring is realized.

The application provides a flexible three-dimensional force sensor simulating hair touch, and belongs to the technical field of electronic skin. The flexible three-dimensional force sensor comprises: a flexible pressure sensing layer comprising at least one sensing unit; and an elastic force decomposition layer arranged on the flexible pressure sensing layer, wherein the elastic force decomposition layer comprises force decomposition units corresponding to the sensing units, each force decomposition unit is implanted with high-rigidity hair on a side away from the flexible pressure sensing layer, the high-rigidity hair comprises a first part exposed outside the force decomposition unit and a second part implanted inside the force decomposition unit, and the first part and the second part constitute a two-stage lever structure; when a space force acts on the high-rigidity hair, the high-rigidity hair amplifies the space force through the two-stage lever structure, and transmits the amplified space force to the corresponding sensing unit through the corresponding force decomposition unit, so that the flexible pressure sensing layer senses the space force. The application can more accurately perceive slight force.

The application discloses a kind of based on directional shuttle-shaped cavity bimodal flexible capacitive sensor and preparation method thereof, belong to flexible electronic sensor technical field, by dispersing magnetic nanoparticles in low boiling point solvent to form magnetic fluid, emulsification dispersion in hydrogel prepolymer liquid, after rheological control, in turn carry out uniform magnetic field pre-stretching and pulse magnetic field strengthening lengthening, make droplet form shuttle-shaped;Again by half freezing lock shape, vacuum freeze drying removes solvent and makes magnetic nanoparticles deposit in cavity inner wall, completely freeze polymerization makes matrix solidification, finally in situ reduction forms conductive layer and is packaged and is prepared sensor, it has bimodal: when pressure is along the long axis direction of shuttle-shaped cavity, it is first electric capacity change rate, when it is along short axis direction, it is second electric capacity change rate, and second electric capacity change rate is greater than first electric capacity change rate, and pressure direction is identified by single electric capacity pair.The application structure is simple, sensitivity is high, stability is good, is suitable for electronic skin, intelligent prosthesis and man-machine interaction field.

The invention discloses an electronic skin capable of realizing non-inductive, continuous and sensitive motion monitoring, and belongs to the field of flexible electronics and biomedical engineering. The electronic skin is mainly prepared from sodium alginate and acrylamide to form porous network gel, and the porous network gel is cross-linked to prepare the original porous base electronic skin; preparing solid-like coating paint from silicon dioxide nanoparticles, silicone oil and epoxy resin; the solid-like coating paint is uniformly sprayed on the surface of the original porous-based electronic skin through a spraying technology, and is cured to form the solid-like coating modified electronic skin. The electronic skin with the specific formula and thickness is prepared, and personalized, low-cost, portable, wireless, non-inductive, continuous and sensitive motion monitoring can be achieved.

The application discloses a visual tactile sensor, an electronic skin and a robot, relates to the field of sensors, and aims to improve the comprehensiveness and sensitivity of force detection. The sensor comprises a magnetic film covering the top surface and the side surface, which is made of mixed magnetic powder and silicone rubber; a support supports the magnetic film, a magnetic display card and a light source are arranged in the support, the magnetic sensing data and the display data of the magnetic film under force are collected by a visual tactile collector, and a multi-modal pressure detection model is used for analyzing the force position and / or the force size. The application has high force detection sensitivity, can realize comprehensive detection of the top surface and the side surface, and has high detection precision.

The present invention provides a transparent and flexible electronic skin with three-dimensional sensing capability. The electronic skin comprises: a substrate; an transparent and flexible electric field sensor disposed on the substrate; a control circuit disposed on the substrate; and a transparent and flexible protective layer encapsulating the electric field sensor and the control circuit. The electric field sensor includes a transmitter electrode; one or more receiver electrodes; and dielectric layer arranged between the transmitter electrode and receiver electrodes. The control circuit is connected to the electric field sensor and configured to: drive the transmitter electrode to transmit a reference signal to establish a quasi-static electrical near field; and process one or more measurement signals received by the one or more receiver electrodes respectively, each measurement signal is indicative of a distortion of the quasi-static electrical near field due to proximity of an object.

This invention relates to the hydrogel technology field and specifically provides a composite membrane, its manufacturing method, applications, and a biosensor. The composite membrane includes a hydrogel-based membrane, within which a reinforcing rib layer is embedded. The reinforcing rib layer is positioned along the extension direction of the hydrogel-based membrane, and the reinforcing rib layer contains some fibers, the fiber material being an elastic polymer, and the thickness of the reinforcing rib layer is 0.1 to 4.0 μm. The mechanical reinforcement between the reinforcing rib layer and the hydrogel-based membrane significantly improves the mechanical properties of the composite membrane, such as tensile strength, toughness, and strength. At the same time, the composite membrane achieves a balance between thickness and mechanical properties, resulting in an ultra-thin structure, good mechanical properties, and breathability, enabling long-term, continuous monitoring of human health using a composite membrane electronic skin biosensor.

The present application relates to a kind of liquid metal / MXene / sodium alginate / polyacrylamide composite hydrogel material and its preparation method and application, the hydrogel material includes liquid metal microsphere, sodium alginate and polyacrylamide form hierarchical porous network and flaky MXene.Preparation step includes: S1.add liquid metal to aqueous solution, ultrasonic dispersion obtains dispersion liquid;S2.dispersion liquid is added to sodium alginate solution, and ultrasonic sodium alginate is obtained to liquid metal water solution;S3.acrylamide is dissolved in deionized water, then sodium alginate is added to liquid metal water solution, then crosslinking agent, initiator and MXene are added, and stirring is uniform;S4.pour into mould heating and form hydrogel.The composite hydrogel material prepared by the present application has the advantages of high tensile rate, strong electromagnetic shielding performance, etc., and can be used as electronic skin for electromagnetic shielding, human health monitoring, man-machine communication, soft robot.

Provided herein is a triboelectric nanogenerator comprising a substrate layer; an electrode layer; and a tribolayer; wherein the electrode layer and the tribolayer are bonded to each other by hydrogen bonds. Also provided herein is a biopolymer-based triboelectric nanogenerator, comprising a first component having a positive tribolayer; and a second component having a negative tribolayer, wherein each of the first component and the second component comprise a substrate layer; an electrode layer; and a tribolayer; wherein the electrode layer and the tribolayer of the first component are bonded by hydrogen bonds. Further provided herein is a method of making a biopolymer-based triboelectric nanogenerator.

According to the piezoelectric ionic gel for tissue repair and the preparation method, PVDF is efficiently induced to be converted from a non-piezoelectric phase to a piezoelectric beta phase through mechanical stretching, and molecular chains are highly oriented; meanwhile, free ions in the ionic liquid are redistributed under the action of a stretching field to form a built-in electric field, so that efficient conversion and self-polarization of a PVDF phase are realized through the synergistic effect of PVDF and the ionic liquid, and excellent and stable piezoelectric performance can be shown without additional high-voltage electric field treatment. The ionic gel prepared by the method not only has high piezoelectric property, but also has high ionic conductivity, excellent stretchability (gt; 500%), good transparency and environmental stability, and has huge application potential in flexible self-powered sensors, electronic skin, soft robots, human-computer interaction interfaces and energy collection devices.

The disclosure provides a flexible electrode material, a flexible electrode, and their preparation methods and applications, belonging to the technical field of composite materials. The carbon microparticle composite material includes carbon particles and gallium oxide attached to the surface of the carbon microparticles. The flexible electrode material includes, by mass, 2-17 parts of gallium-coated carbon particles and 83-98 parts of liquid metal. The flexible electrode is prepared by coating the flexible electrode material onto a flexible substrate via screen printing, attaching copper conductive wires to both ends of the printed flexible electrode material, applying a viscoelastic material coating over the surface of the flexible electrode material, and curing and drying the flexible electrode material at room temperature. The composite material can be applied to electronic skin for detecting human body motion states and earth pressure cells for monitoring soil pressure in engineering projects.

The invention provides a multi-mode radiotherapy body surface monitoring method, device, equipment and medium, and relates to the technical field of body surface monitoring, and the method comprises the steps: carrying out the time-space synchronization processing of optical body surface equipment and pressure sensing electronic skin, a three-dimensional point cloud sequence and a pressure distribution map sequence captured by the optical body surface device and the pressure sensing electronic skin respectively are continuously collected in sequence at the same time; constructing an optical body surface model and determining a target pressure distribution map; a real-time optical body surface three-dimensional point cloud and a real-time pressure distribution map are obtained; and performing independent verification and joint cross verification on the real-time optical body surface model and the real-time pressure distribution map, and performing positioning guidance or monitoring alarm according to an obtained independent verification result and an obtained joint cross verification result. The technical problems that in the prior art, single body surface monitoring is low in accuracy and high in false alarm rate are solved, and the technical effects that multi-mode combined cross validation and independent validation parallel monitoring are achieved, and the monitoring reliability is improved are achieved.

The application discloses a multi-modal adaptive electrochemical synapse electronic skin and a closed-loop anti-skid control system thereof, relates to the technical field of flexible electronic skin, and comprises a multi-modal electrochemical electronic skin, wherein the multi-modal electrochemical electronic skin is composed of a sensing unit, a signal processing unit and a substrate layer unit; the sensing unit is used for acquiring a stimulation signal by the multi-modal electrochemical electronic skin; the signal processing unit is used for converting and transmitting the acquired signal; and the substrate layer unit is used for integrating the sensing unit and the signal processing unit and forming the electronic skin. The application realizes multi-modal sensing of the stimulation received by the electronic skin through a multi-modal sensing layer, predicts the critical condition in the early stage of slip occurrence, dynamically generates a control strategy according to the characteristics of an object, feeds back and adjusts an actuator, adjusts the actuator in real time, and improves the accuracy and efficiency of the system in the judgment of a complex scene.

The application discloses an electronic skin material containing MOF modified liquid metal nanoparticles, and relates to the field of flexible electronic technology. The electronic skin material comprises, from bottom to top, a liquid metal-MOF composite layer, a Bi2Te3 thermoelectric layer and a packaging layer. The thickness of the electronic skin material is 60-150 mu m. The liquid metal-MOF composite layer comprises the following raw materials: 22-30% of liquid metal, 45-53% of MOF material and the balance of an elastic matrix in terms of mass percentage. The Bi2Te3 thermoelectric layer is obtained by mixing Bi2Te3 nanosheets and an elastic matrix and coating. The electronic skin material is adjusted by adjusting the types of liquid metal, MOF material and additives to adapt to various application scenarios.

The invention discloses a preparation method of a bionic cobweb hydrogel electronic skin sensor. The preparation method comprises the following steps: step 1, preparing a PVA solution; 2, a conductive agent LiCl, AM, a cross-linking agent MBAA, an accelerator TEMED and an initiator APS are sequentially dissolved in a PVA solution, and a mixed solution is obtained; and step 3, transferring the mixed solution prepared in the step 2 into a cobweb-shaped mold for gelation transformation, and then carrying out physical crosslinking by adopting a freeze-thaw method to prepare the bionic cobweb-shaped hydrogel electronic skin sensor. PVA and AM are adopted as base materials to prepare a mixed solution, then the mixed solution is poured into a cobweb-shaped mold, and a freeze-thaw method is adopted to prepare the bionic cobweb-shaped hydrogel electronic skin sensor with radial longitudinal lines and spiral transverse lines. The sensor can position the stress position, and is high in skin deformation matching degree and fast in signal response.

This invention relates to the technical field of electronic device manufacturing, specifically to an electronic skin with a blackened metal mesh conductor and its preparation method. The electronic skin, from the substrate side to the outer side, comprises: a flexible adhesion layer, a flexible base layer, a metal mesh conductive layer, a blackened functional layer, a flexible buffer layer, a corrosion-resistant encapsulation layer, and a hydrophobic and wear-resistant surface layer. The electronic skin of this invention, through a seven-layer gradient composite structure design, achieves synergistic cooperation among the functions of each layer, significantly improving overall flexibility and structural stability, with no interlayer peeling or cracking during deformation. The design of the blackened functional layer retains the high conductivity of the metal mesh conductive layer while achieving low reflectivity and anti-light interference effects, adapting to the application requirements of multiple optical scenarios, and simultaneously improving the oxidation resistance of the metal mesh. Each functional layer has a clear division of labor and is closely integrated, making the overall device suitable for large-scale fabrication and possessing good practical application value.