69 results about "Triboelectric effect" patented technology

A device for recovering energy including a first assembly and a second assembly facing each other, the first assembly including a first conductive element and a first dielectric element carried by the first conductive element, and the second assembly including a second conductive element. The first dielectric element is arranged between the first conductive element and the second conductive element. The device further includes a mechanism ensuring that the first dielectric element comes into contact with the second conductive element. A material of the first dielectric element and the material of the second conductive element have different triboelectric affinities.

The invention discloses a friction electric field effect transistor, and belongs to the field of flexible electronic devices. A triboelectric effect and a semiconductor effect are combined; friction is produced by using external force; electrostatic potential is formed as a gate signal to realize adjustment and control over carrier transport characteristic in semiconductor. Mechanical effect stressed on the device can be converted into a local electronic control signal; a new method for adjusting and controlling the carrier transport characteristic in an electronic device by taking the electric potential produced by the friction effect as gate voltage. Different from the conventional field effect transistor, the electronic control signal is generated by the friction electric field transistor by using friction, the gate electrode in the conventional field effect transistor is substituted, direct interaction of the external force and the electronic device is realized, a wider external force sensing range is realized, and the transistor is widely applied to the fields such as human-computer interaction, sensors and flexible electronics.

Provided is a triboelectric pressure sensing cable. The triboelectric pressure sensing cable comprises a central conducting wire, a high-molecular polymer insulating layer, an electrode layer, and an insulating outer layer, which are coaxially attached in sequence. The central conducting wire and the high-molecular polymer insulating layer, and/or the high-molecular polymer insulating layer and the electrode layer separately generate signals by the means of triboelectric effect. Also provided is a method for preparing the triboelectric pressure sensing cable. The method comprises the steps of (1) preparing a high-molecular polymer solution; (2) forming a hollow cavity framework used for casting; (3) casting; (4) molding; and (5) forming an insulating outer layer so as to obtain the triboelectric pressure sensing cable. The provided triboelectric pressure sensing cable can achieve a monitoring effect which is the same as that of a conventional pressure cable, without requiring a high input impedance circuit or a charge-amplifier.

There is provided a three-dimensional triboelectric energy generator comprising: a moving object; at least two triboelectric energy generator modules defining at least two planes respectively, wherein the moving object is disposed between the least two planes; and at least two elastic members configured to couple the moving object to the at least two triboelectric energy generator modules respectively, wherein a movement of the moving object allows each of the at least two triboelectric energy generator modules to generate a triboelectric energy.

The invention discloses a self-adhesive hydrogel patch with self-generating performance as well as a preparation method and an application thereof, and belongs to the field of hydrogel biomedical materials. The patch is prepared by compounding self-adhesive hydrogel and a nano power generation device. The nano power generation device comprises a power generation layer with a piezoelectric effect,a triboelectric effect or a pyroelectric effect and an electrode. The patch disclosed by the invention can be automatically adhered to the skin, does not need a fixing adhesive tape, isolates a woundfrom being in contact with external bacteria, avoids infection, is breathable and moisturized, and is beneficial to maintaining a wound healing environment. When a treated object moves or even breathes, the high-adhesive hydrogel patch with the self-power-generation performance can convert mechanical energy and heat energy into electric energy, an external electric field is generated to influencethe transcutaneous potential of a wound, cell proliferation, migration and epidermal regeneration are promoted, and wound repair is accelerated.

A conveyor for transporting objects sensitive to electrostatic discharge. In one embodiment, the present invention relates to a roller conveyor with conductive rollers in electrical communication with an electrical ground. The rollers preferably have about 10⁵ ohms resistance from the outer diameter to the inner diameter to ensure that electrostatic charges built up on the conveyed object can flow to ground, yet not flow too quickly. In another embodiment, the roller shafts are supported on highly conductive bushings that provide a path to electrical ground that is preferably less that 10⁴ ohms. In yet another embodiment, the roller shafts are driven by a conductive pulley that minimizes the build-up of electrostatic charge as a result of a triboelectric effect with the drive belt.

The present disclosure provides a graphene-based touch sensor device using triboelectric effect, the device comprising: a substrate; a first electrode layer disposed on the substrate; a graphene channel layer disposed on the substrate, wherein the graphene channel layer is flush with the first electrode layer, and is spaced from the first electrode layer; a gate dielectric layer in partial contact with the electrode layer and the graphene channel layer respectively; source and drain electrodes formed on both opposing ends of the graphene channel layer respectively; and a triboelectric layer formed on the first electrode layer, wherein the triboelectric layer generates a triboelectric potential via contact of an external friction material therewith, wherein the contact of the external friction material is detected based on a current change in the graphene channel layer due to the triboelectric potential applied thereto.

A charged particle acceleration device according to some embodiments of the current invention includes a first triboelectric element, a second tribo-electric element arranged proximate the first tribo-electric element to be brought into contact with and separated from the first triboelectric element, an actuator assembly operatively connected to at least one of the first and second triboelectric elements to bring the first and second triboelectric elements into contact with each other and to separate the first and second triboelectric elements from each other, and a charged-particle source configured to provide charged particles in a gap between the first and second triboelectric elements.

The present disclosure provides a flexible electric generator and methods for fabricating the same. The flexible electric generator comprises a flexible triboelectric layer covering the electrode layer of a flexible piezoelectric generator that enhances output power by combining piezoelectric effect and triboelectric effect. The reliability of the flexible electric generator under bending is also improved due to the presence of the flexible triboelectric layer. The fabrication methods of the disclosed flexible electric generators are simple, thereby enabling large-scale manufacturing.

The invention relates to a low-frequency broadband electromagnetic-piezoelectric-friction combined type vibration energy collector. The energy collector comprises a shell, end covers are fixed to theupper end and the lower end of the shell correspondingly. Fixed magnets are fixedly installed on the inner surfaces of the two end covers, a movable magnet mechanism is installed in the middle in theshell, an induction coil is installed at the position, where the movable magnet mechanism is located, of the peripheral wall of the shell, and an elastic limiting mechanism and a friction power generation mechanism are sequentially arranged between the movable magnet mechanism and the fixed magnets on the two sides respectively. According to the invention, the multi-stable vibration system and thetwo-degree-of-freedom vibration system are utilized to enable the vibration energy collector to respond to low-frequency vibration in a wide range; meanwhile, the piezoelectric effect and the triboelectric effect are used for collecting collision energy, collision energy consumption is reduced, and the vibration energy collector further has the advantages of low-frequency broadband response capacity and efficient energy collection at the same time.

The present disclosure generally relates chitosan-based biopolymers and chitosan biopolymer film based triboelectric nanogenerators generating voltage and current using the triboelectric effect. The chitosan-based biopolymer is a reaction product of at least a chitosan and an acid, and optionally one or more component selected from starch, lignin and/or glycerol.

A pump for use with a tube, having a rotor having an axis of rotation and a plurality of rollers configured to define an orbital path about the axis of rotation, the orbital path defined by a radius, and a roller bed having a surface adapted to support the tube for peristaltic compression by one or more rollers, wherein the surface has a predetermined profile comprising a circular arc segment and at least one side segment, the arc segment having a first curvature defined by the radius, and the at least one side segment having a second curvature lesser than the first curvature.

A system and method for controlling temperature of a workpiece such as a semiconductor wafer and the chuck supporting the wafer are described. The system includes a heat exchanger used in controlling temperature of a temperature control fluid. A first fluid carrying path carries the temperature control fluid from the heat exchanger to an outlet, the outlet being connectable to the workpiece chuck to carry the temperature control fluid to the workpiece chuck. A second fluid carrying path carries the temperature control fluid from an inlet to the heat exchanger, the inlet being connectable to the workpiece chuck to carry the temperature control fluid from the workpiece chuck to the temperature control system. A dual-flow rate technique is employed such that, when the chuck temperature is in transition, the temperature control fluid is circulated at a relatively high flow rate such that temperature transition of the chuck can be realized at a fast rate. When the temperature of the chuck is being maintained at a set point temperature, the flow rate of the fluid can be reduced such that electrical noise introduced by the motion of the fluid, such as by the triboelectric effect, can be reduced. A capillary tube can be connected between the first fluid carrying path and the second fluid carrying path. First and second valves can be connected in the first and second fluid carrying paths to prevent the flow of fluid into the chuck when the chuck is at high temperature such that motion induced by flash boiling of the fluid is eliminated.

A device and method for controlling fuel-air ratio during combustion of ground in a coal power plant, including pneumatic delivery of ground coal to the burners and feeding combustion air to burners while controlling the combustion air and the amount of carrier air. A high reliability of control combined with low maintenance of the air mass measurement devices is achieved. This is achieved by a measurement device for measuring the amount of combustion air which, according to correlation measurement, evaluates the triboelectric effects on sensors. Between 0.1 mg and 10 mg of fine-grained particles of a diameter between 20 μm and 200 μm are introduced per m³ air into suctioned fresh air, which is carried out during the starting of the firing system. This is done by correlation measurement that evaluates triboelectric effects on sensors, arranged in series in carrier air stream in direction of flow of the carrier air.

A vibration transducer for sensing vibrations includes a first flexible triboelectric member, a second flexible triboelectric member, a plurality of attachment points, a first electrode and a second electrode. The first flexible triboelectric member includes a first triboelectric layer and a material being on a first position on a triboelectric series. A conductive layer is deposited on the second side thereof. The second flexible triboelectric member includes a second triboelectric layer and a material being on a second position on the triboelectric series that is different from the first position on the triboelectric series. The second triboelectric member is adjacent to the first flexible triboelectric member. When the first triboelectric member comes into and out of contact with the second triboelectric member as a result of the vibrations, a triboelectric potential difference having a variable intensity corresponding to the vibrations can be sensed between the first and second triboelectric members.

The embodiment of the invention discloses a self-driving high-precision angle measuring system and method. The system comprises an angle sensor component, a multi-channel synchronous data acquisitionmodule and a microprocessor module. Based on the frictional electrification effect, a frictional nanogenerator is used to directly convert rotary motion into an alternating current signal for output.The output signal exhibits ideal signal-to-noise ratio. By analyzing the generated alternating current signal, real-time and accurate measurement of rotation angle and rotation direction is realized.The overall system has a simple and compact structure, is easy to integrate with the spindle of a variety of devices, and has the advantages of self-driving work and wide application range.

An electrocardiography (ECG) electrical cable, that includes a plurality of insulated conductors, a conductive shield surrounding the plurality of insulated conductors and an insulating jacket surrounding the plurality of insulated conductors and the conductive shield. Also, each of the plurality of insulated conductors includes a low noise coating and the insulated conductors are tightly bound together by a semi -conductive wall interposed between the insulated conductors and the shield, thereby reducing rubbing, which can produce triboelectric effects.

The invention discloses a water drop energy collection system and method based on the triboelectric effect. The system comprises a liquid drop spraying device, a rotary liquid drop generator and an external load circuit. The liquid drop spraying device comprises a water storage tank and an atomizing nozzle, and the atomizing nozzle sprays out atomized liquid drops. The rotary droplet generator comprises a generator shell, blades, supporting ribs, a concentric annulus electrode, a positive extraction electrode and a negative extraction electrode. The multiple blades are distributed outside thegenerator shell in the radial direction, the vaporific liquid drops are sprayed to the surfaces of the blades, and the plurality of blades are connected in series through circuits. The positive and negative electrodes after series connection are respectively connected with the positive extraction electrode and the negative extraction electrode, the concentric annulus electrode and the supporting ribs are installed in the generator shell, the positive extraction electrode, the negative extraction electrode and the concentric annulus electrode form an electric brush, and the external load circuit is electrically connected with the electric brush. According to the present invention, an electric field can be generated through the repeated impact of liquid drops or a piezoelectric effect, and the efficient power generation is achieved.

The invention discloses a breathable and stretchable nanofiber composite thin film material for a friction nano-generator and a preparation method of the breathable and stretchable nanofiber composite thin film material. The material is formed by blending nanofibers and elastomer microspheres through electrostatic spinning, wherein the nanofibers are polyvinylidene fluoride-hexafluoropropylene copolymer (PVDF-HFP), and the elastomer microspheres are styrene-ethylene-butylene-styrene block copolymer. The preparation method comprises the following steps of (1) dissolving a nanofiber precursor into a solution A for electrostatic spinning; (2) dissolving the elastomer microspheres into a solution B for electrostatic spinning; and (3) spinning the nanofibers and the elastomer microspheres synchronously by adopting a conjugate electrostatic spinning processing technology to obtain a nanofiber composite thin film. The nanofiber composite thin film material prepared by the invention has the advantages of adjustable thickness, air permeability, waterproofness and stretchability, has a good triboelectrification effect, is simple in preparation method and suitable for industrial production, and can be applied to the breathable and stretchable wearable friction nano-generator.