560 results about "Electronic skin" patented technology

The invention provides a pressure sensor, and further provides electronic skin, touch screen equipment and safety alarm equipment correspondingly, wherein the electronic skin, the touch screen equipment and the safety alarm equipment are based on the pressure sensor. The pressure sensor comprises a substrate. The substrate is provided with a plurality of sensing units arranged in an array mode; a static nano generator with two friction layers is adopted in the sensing units, when external force is applied to the sensor, the distance between two friction layers of each sensing unit feeling the external force is changed, and electrical signals output outwards by two corresponding electrode layers are also changed; electrode layers of all sensing units are led out of the sensor through wires, so that functions like pressure (stress) positioning and pressure field mapping can be achieved. The electronic skin, the touch screen equipment and the safety alarm equipment do not need to be powered by power supplies and can conduct pressure induction in a self-driven mode.

This disclosure features an electronic display with overlayed electronic skin. The display includes an outer transparent display surface and can be placed in a dark state or in a bright state. The skin overlays the outer display surface and includes an electro-optic layer. Transparent electrically conductive layers are disposed on each side of the electro-optic layer. Electronic circuitry applies voltages to the electrically conductive layers enabling the electro-optic material of the electronic skin to be placed into a substantially transparent state and a reflective state. Images or colors can be displayed on the electronic skin while portions of the electronic skin are in the reflective state and light passing through the electronic skin is absorbed by the display in the dark state. When the display is in the bright state images or colors can be displayed on the display that can be seen through the electronic skin.

An electronic skin treatment device with an integrated specimen dispenser is disclosed, with which specimen dispense can be concurrently applied to target skin area while ultrasonic vibrations, mechanical massaging motions, galvanic stimulations, or light illuminations are used and as such a customizable, easier and better skin beautification can be achieved.

The invention features electronic skin including an active layer formed of bistable cholesteric liquid crystal material and articles comprising the skin, the electronic skin having uniform gray scale reflectivity. Also featured is method for producing suitable reduction pulses that will provide a display (e.g., the electronic skin) with uniform gray scale reflectivity. Reduction pulses of narrow width are used to create uniform levels of gray in the electronic skin to overcome display imperfections that cause discontinuity in the gray scale reflectivity.

An assembly and method of identifying and visually associating individuals and medical equipment includes a computing device having a software algorithm that determines a unique combination of one or more human cognitive identifiers to avoid confusion and displays the determined selection on an electronic skin located on the individual or medical equipment so that identities and associations amongst individuals and equipment can be understood readily.

The invention relates to electronic skin based on three-dimensional flexible substrate graphene and a preparing method thereof. The graphene electronic skin comprises two flexible substrates and graphene films covering the inner surfaces of the flexible substrates. When the three-dimensional flexible substrates are subjected to external action force such as squeezing and stretching, the contact area of the upper graphene layer and the lower graphene layer is changed, so that change of the contact resistance between the two layers is caused directly, and then the shape change of the electronic skin under external force is reflected by reading a voltage or current signal. The electronic skin based on the three-dimensional flexible substrate graphene is transparent and has the advantages of being ultralight, ultrathin, capable of saving energy and the like. The graphene is environmentally friendly, poisonless and compatible with the human body and can be used on the human skin in a more healthy way.

A portable electronic device includes a portable electronic device housing having a surface and a primary, light-emissive display. A display skin covers a portion of the surface of the portable electronic device housing. The display skin provides a secondary, light-reflective display. The display skin includes an optically active layer comprising electrooptical material. A first electrode layer is disposed on a first side of the optically active layer proximal the surface of the portable electronic device housing. A second electrode layer disposed on a second side of the optically active layer distal of the surface of the portable electronic device housing. Electronic circuitry selectively activates the optically active layer such that images including portions of a document are selectively displayed by the display skin. The display skin is capable of maintaining a display of a selectively displayed portion of the document while the primary display is in an unpowered state.

The invention provides an electronic skin of a friction electrostatic induction type, and the electronic skin comprises a friction layer, an upper electrode, an insulating layer, a lower electrode and a flexible substrate, wherein the friction layer, the upper electrode, the insulating layer, the lower electrode and the flexible substrate are sequentially arranged in a fixed manner from the top to the bottom, and the upper and lower electrodes are insulated from each other. Each intersection point of the upper and lower electrodes represents one detection position. When human skin touches any detection position, the corresponding electrodes of the upper and lower electrodes respectively output a signal, so the touch position can be obtained. The electronic skin employs the friction electrostatic induction effect, and generates an electric signal through the contact and separation of a human body with the friction layer, so as to sense the touch condition of an external object. The electronic skin has a self-drive function, is good in stability, is high in sensitivity, and is quick in response. Meanwhile, the electronic skin employs a flexible polymer thin film material with the biocompatibility, and is wide in application range.

The invention relates to a development method of a flexible pressure-sensitive element based on a carbon nano-tube filled high polymer composite material, which belongs to the technical field of sensors. The method comprises the following steps of: 1. pressure-sensitive material preparation: dispersing carbon nano-tubes into polydimethylsiloxane by utilizing ultrasonic vibration and mechanical stirring methods, and preparing a thin and flexible pressure-sensitive material by using tetraethoxysilane as a crosslinking agent and dibutyltin dilaurate as a catalyst with a spin coating method; 2. pressure-sensitive element packaging, wherein a two-stage sandwich structure is adopted, the first-stage sandwich structure comprises two layers of packaging films and the pressure-sensitive material positioned in the middle; and in the second-stage sandwich structure, each layer of packaging film comprises two layers of polyimide films as well as a copper foil electrode and a lead which are embedded in the two layers of polyimide films. The pressure-sensitive element developed by the invention has good flexibility, high precision, thin thickness, simple process and low cost and is applicable to the fields of pressure monitoring of structures between narrow curved surface layers in the fields of military industry and civil use and artificial electronic skin development and the like.

The disclosed wearable device modulates a patient's gastric emptying time and / or gastric retention time. The wearable device includes a microprocessor, electrical stimulator and at least one electrode configured to deliver electrical stimulation to the epidermis, through a range of 0.1 mm to 10 mm or a range of 0.1 mm to 20 mm of the dermis, of a T2 dermatome to a T12 dermatome or meridian of the patient, a C5 to a T1 dermatome across the hand and / or arm, and / or the upper chest regions. The device is adapted to provide electrical stimulation as per stimulation protocols and to communicate wirelessly with a companion control device configured to monitor and record appetite patterns of the patient. The control device is also configured to monitor, record, and modify stimulation parameters of the stimulation protocols.

The invention relates to a wearable flexible stress sensor and a preparation method and application thereof. Firstly, functional ink suitable for screen printing is prepared, and is printed on a wearable substrate through a screen printing method, and the stress sensor of a desired specification is produced. The stress sensor is used for monitoring physical deformation of stretching, bending, touching and the like from small ranges to large ranges, and has multiple application in the electronic skin fields and the biomedical application fields of human skins, expressions, pulses, heartbeats and the like, the human-computer interaction fields and the fields of virtual reality, entertainment technology and the like. The flexible stress sensor of the invention has the following advantages that the sensor has excellent stretching elasticity, and stretching strain can reach 100%; sensitivity is extremely high, and a sensitivity parameter (Gauge Factor) can be up to 8000 or more; linear relationships of working curves are excellent, stretching repeatability is good, and a stretching cycle lag is small; and a preparation process is simple, costs are low, massive integrated-device preparation is suitable, and application prospects are wide.

The invention discloses a flexible polymer conductor, and a preparation method and applications thereof. According to the preparation method, 0.01 to 20 parts of a nano conductive filler is uniformly dispersed in an aqueous solution or an ethanol solution containing 0 to 1 part of a surfactant via ultrasonic dispersion; 100 parts of a flexible polymer powder is added, full stirring is carried out so as to coat the surfaces of the flexible polymer particles with the nano conductive filler uniformly; the flexible polymer powder coated with the nano conductive filler is obtained via filtering, drying, and screening, and is dispersed onto a selective laser sintering device workbench for 3D printing so as to obtain the flexible polymer conductor. The flexible polymer conductor possesses excellent mechanical properties and electrical conductivity; electrical conductivity can be as high as 5.06S / m; cyclic tension can be carried out for one thousand times under deformation of 50%, and electrical conductivity is maintained to be essentially constant; the flexible polymer conductor can be applied to the fields such as electronic skin, flexible electrode, flexible implantable device, wearable devices, flexible display screen, artificial blood vessel, or dielectric elastomer drivers.

The invention discloses a two-way stretchable supercapacitor and a manufacturing method thereof. The supercapacitor is composed of carbon nano tube film electrodes, an elastic polymer matrix and a gel electrolyte. The carbon nano tube film electrodes are provided with network structures which are connected with one another, materials of the carbon nano tube film electrodes are flexible, deformable and stretchable, and thus the supercapacitor has the two-way tensile property. The two-way stretchable supercapacitor can be of a planar structure and also can be of a sandwich structure. The supercapacitor manufactured through the method can be vertically stretched by 30%-100% in the plane in a two-way mode, the electrochemical performance is kept stable, and the supercapacitor further has the reciprocating tensile property. The two-way stretchable supercapacitor is simple in manufacturing method, easy to implement, capable of achieving batch production and capable of being used in various fields of wearable electronic devices, electronic skin devices, intelligent integrated devices and the like.

The invention relates to a pressure detection device and method based on a piezoresistive and piezoelectric flexible sensor combination. A piezoresistive sensor set is used for detecting the pressure distribution condition, the pressure distribution condition is transformed to digital signals through a data collecting and processing module, sent to a pressure calculation module through a wireless communication module, and carried out real-time display in a display module. Piezoelectric signals are used for judging whether is in a pressure changing state or not to switch the sleepy and activated states of a single chip computer; in the long time sleep state, a zero point of the piezoresistive sensor is corrected; in the activated state, pressure sensing signal frequency dynamic tracking is carried out, and when the pressure sensing signal frequency is in a high frequency response, piezoriesistive sensor signals can be modified through piezoelectric signals to improve the high frequency performance of the piezoriesistive sensor signals. The pressure detection device and method based on the piezoresistive and piezoelectric flexible sensor combination has the advantages of being low in power dissipation, strong in durability, good in dynamic performance, and capable of being applied to fields of wearable plantar pressure detection, artificial limb pressure detection and robot electronic skin.

The invention, which belongs to the technical field of pressure sensor preparation, discloses a preparation method of a flexible film pressure sensor. The method comprises: step one, forming an electrode layer on a flexible substrate; step two, adding an organic solvent into a conductive filler, carrying out fixing uniformly to obtain a mixed solution A, adding a polymer matrix material and a modifier into the mixed solution A, and carrying out fixing uniformly to obtain a slurry; step three, carrying out stirring and coating the flexible substrate with the electrode layer with the obtained composite slurry by means of silk-screen printing to obtain a sensitive layer having a surface microstructure; and step four, placing the two flexible structures with the sensitive layers and the electrode layers in opposite and carrying out packaging to obtain a flexible film pressure sensor. According to the invention, the prepared flexible film pressure sensor has advantages of high sensitivity being less than 5kPa<-1>, wide measuring range of from 50Pa to 1.5MPa, and short response time from 5 to 30ms and has the broad application prospects in fields of electronic skin, human body biologicalsignal detection and vibration signal detection.

The application discloses an electronic skin, which comprises a flexible sensitive layer, wherein at least one of the upper surface and lower surface of the sensitive layer is of a nonplanar structure, and an upper electrode layer and a lower electrode layer are respectively formed on the upper surface and lower surface of the sensitive layer. The invention also discloses a fabrication method for the electronic skin. The electronic skin disclosed by the invention is integrated with a novel micro / nano sensing technology, the electronic skin can be perfectly integrated with the skin of the human body because an ultrathin elastic film material which is nontoxic and has good biocompatibility is used, and therefore a formed wearable device can bring excellent experience to a user; meanwhile, because of the unique nanostructure of the sensitive material, the device has higher sensitivity and better stability; in addition, because the whole device is light and small, the device has the advantage of convenience in carrying.

The invention discloses a three-dimensional graphene / carbon nanotube network flexible multifunctional strain sensor preparation method. According to the invention, the three-dimensional network of three-dimensional graphene and a one-dimensional carbon nanotube grows through two-step chemical vapor deposition; and the three-dimensional network and an elastic polymer as a flexible substrate are solidified and combined to acquire a flexible wearable multifunctional electronic strain sensor based on the three-dimensional network of the graphene and the carbon nanotube. According to the invention, the electronic strain sensor breaks the limitation relationship between the strainability and the sensitivity of the strain sensor, has an excellent electronic strain sensing performance and the function of a micro heater, realizes high sensitivity detection of human physiological signals and physical activities, shows excellent electronic skin simulation capabilities and a micro heating source application performance, has the advantage of simple process, and can be widely used in many fields such as clinical diagnosis, health monitoring, a robot, an electronic screen, electronic skin, a flexible micro heater and intelligent home.

The invention discloses electronic skin with irregular surface microspikes. The electronic skin comprises a substrate, a support layer, a pressure-sensitive sensing layer, an electrode layers and a flexible protective layer in sequence from bottom to top, wherein the edge of the flexible protective layer is bonded with the substrate through a double-side viscous layer, so as to package the support layer, the pressure-sensitive sensing layer and the electrode layer; the microspikes are formed on the surfaces of both the support layer and the pressure-sensitive sensing layer. The electronic skin is obtained by treating a material with non-uniform surface microscopic height as a mold plate according to a chemical solution method. The electronic skin has the characteristics of double sensitivity; the sensitivity in a low-pressure area reaches up to 909 kPa<-1>; the sensitivity in a high-pressure area reaches up to 46 kPa<-1>; the total sensitivity in the pressure sensitive area can reach up to 20 kPa or higher. The electronic skin and a preparation method thereof have the advantages of being novel and simple, obvious in effect, excellent in performance and low in cost, thereby having huge potential and superiority in the field of robots.

The present invention provides a modular platform unit comprising a plurality of sensors for the combined sensing of pressure, temperature and humidity. In particular, the sensors are composed of a layer of metallic-capped nanoparticles (MCNP) casted on a flexible substrate or a rigid substrate. Integration of the platform unit for artificial or electronic skin applications is disclosed.

The invention discloses a stress sensor with a self-repairing ability and a preparation method thereof. according to the preparation method, a one-dimensional metal nanowire, a two-dimensional inorganic nanosheet, hydrogel functional polymers, an additive and the like are compounded to prepare a nanocomposite colloidal printing ink with rheological characteristics, and the colloidal printing ink is printed on a wearable substrate through screen printing to prepare the repairable stress sensor having a shell-like bionic structure, wherein the one-dimensional metal nanowire provides a conductivenetwork structure for reducing resistance of the sensor; the two-dimensional inorganic nanosheet forms a layered strcture for improving sensitivity of the sensor; and a reversible dynamic cross-linking point is formed among the repairable hydrogel functional polymers, the two-dimensional inorganic nanosheet and the additive, so that the device has repairable performance. The prepared stress sensor has the advantages of large operating strain range, high sensitivity, repairable property after overload damage and the like, and has great application prospects in the fields of artificial electronic skin and biomimetic robots.

The invention discloses a preparation method of a micro-nano corrugated structure. The preparation method comprises the following steps of: (1) adding electrostatic spinning macromolecular solution into a syringe of a syringe pump, and fully filling the solution into a metal nozzle connected with the anode of a high pressure generator; (2) placing a metal cathode collecting plate connected with the ground electrode of the high pressure generator below the metal nozzle of the syringe, placing a flexible base material on the collecting plate, controlling the macromolecular solution to flow out at certain velocity, and electrifying the macromolecular solution to form jet flow; and (3) moving the metal collecting plate so that the jet flow falls on the flexible base material, namely the corrugated structure is formed on the whole base material. The invention also discloses the micro-nano corrugated structure prepared by using the method, a device for implementing the method and application of the method. When the elastic rubber base material stretches, the formed nano fiber graph can produce great deformation together with the elastic rubber base material and does not break, so that effective interconnection and stretching of flexible electrons are realized, and the invention has broad application prospect on the aspects of electronic skin, artificial muscles, bioelectronics and the like.

The invention provides a piezoresistive electronic skin, a preparation method and a use thereof. The piezoresistive electronic skin uses carbon nanotube film as the conductive layer and uses materials provided with micro-nano patterns, such as polydimethylsiloxane, polyethylene terephthalate, polyvinyl alcohol, polyvinyl formal, polyethylene, and so on, as the substrate, enabling the substrate has advantages of high flexibility and being pliable, and it needs low operating voltage and little power consumption, but has high sensitivity and short response time. More importantly, the invention uses the patterned flexible substrate as the basis, greatly improving the sensitivity of electronic skin reacting to tiny applied force from outside. The invention also provides a capacitive electronic skin and a preparation method thereof. Further, the invention also provides a use of the piezoresistive electronic skin or the capacitive electronic skin on speech recognition, pulse detection, medical robot, etc.

The invention discloses a stretchable self-healing hydrogel flexible strain sensor. A self-healing hydrogel with a high stretchability is obtained by a one-step sol-gel technology, and the multifunctional flexible strain sensor is obtained by packaging using an adhesive tape. The hydrogel-based flexible strain sensor has a high sensitivity factor, and can be used for detecting the tensile strain and the compressive stress; and real-time detection of small strenuous human exercises is achieved due to the high stretchability and the low hysteresis behavior. The interaction of unique coordinationbonds and hydrogen bonds in the hydrogel make the sensor have a short self-healing time and a high self-healing efficiency, so the problems of damages and no recovery after tensile failure of flexible sensors are solved. The flexible sensor designed in the invention has the advantages of simple preparation process, time and labor saving and excellent performances, and can be widely applied to thefields of real-time health monitoring, flexible robots, clinical diagnosis, flexible electronic skins and smart home products.

The invention relates to a metal particle modified graphene flexible sensor and a preparation method and an application thereof. The sensor comprises an electrode layer and a flexible composite material layer. The preparation method comprises the steps of filling porous sponge with a metal particle modified graphene material by means of extruding and dipping, carrying out freeze drying, and coating two ends of the obtained flexible composite material layer with an electrode layer. The flexible sensor is simple in manufacturing process, low in cost, suitable for mass production of flexible devices and capable of realizing the application in electronic skin, motion tracking, wearable electronic and environment monitoring equipment.

The invention discloses a high-sensitivity flexible piezoresistive sensor based on an MXene bionic skin structure. The high-sensitivity flexible piezoresistive sensor comprises a flexible interdigitalelectrode layer, an MXene-based silica gel bionic layer and a packaging layer; the MXene-based silica gel bionic layer is prepared by obtaining a film with a bionic skin structure through silica gelimpression abrasive paper and then coating the bionic film with the film; the flexible interdigital electrode layer is obtained through ink-jet printing and magnetron sputtering; the MXene-based silica gel bionic layer is in direct contact with an electrode area to form a loop; and the packaging material is preferably a polyethylene film. The flexible pressure-sensitive sensor provided by the invention has extremely high sensitivity, low detection limit, short response time and high stability, and shows great application potential in practical application of electronic skin, wearable electronic devices and the like. The sensor solves the problems that an existing MXene-based piezoresistive sensor is complex in preparation process and difficult to have high sensitivity and stability at thesame time.

The invention provides a flexible electronic skin capable of sensing pressure and a preparation method thereof, relates to the technology field of flexible sensors. The flexible electronic skin is interwoven by a plurality of conductive yarns and forms a fabric structure. The conductive yarn comprises a conductive fiber as an inner core and a conductive elastomer material coated on the surface ofthe conductive fiber. The flexible electronic skin uses the conductive fiber as an electrode material and the conductive elastomer material layer as a sensitive material layer, and uses contact resistance change of warp and weft interlacing points of the conductive yarns as a signal for sensing pressure. The invention also provides a preparation method of the flexible electronic skin capable of sensing pressure. The prepared flexible electronic skin has good stability and high sensitivity, and does not need to introduce an external electrode, and can be directly woven into a textile, or used for mechanical sensing of the surface of a robot arm and a human prosthetic.

The invention discloses a flexible wearable nano-fiber fabric sensor and a preparation method thereof. Continuous nano-fiber yarn is prepared through the conjugate electrostatic spinning yarn forming technology, and then the surfaces of fibers in the yarn are coated with a layer of conducting polymer in a polymerization mode. On the basis, the yarn is woven into fabric through a weaving method, the upper surface and the lower surface of the fabric are compounded with gel films with conducting copper wires, and the nano-fiber fabric sensor of a sandwich structure is obtained and is applied to wearable electronic skin. When the fabric sensor suffers from external force stimulation, the fabric sensor has good mechanical adaptability and shows superhigh sensitivity and wide sensing range. The sensor can achieve low pressure heart rate monitoring and high pressure limb motion monitoring in a human body monitoring system.