29 results about "Triboelectric effect" patented technology

The invention discloses an application of a chiral polylactic acid piezoelectric material doped polyaniline composite friction film in degradation of organic pollutants. The application specifically comprises the following steps: adhering the chiral polylactic acid piezoelectric material doped polyaniline composite friction film to the bottom of a turntable, and adhering a friction bottom sheet to the bottom in a flat-bottom container; the organic pollutant solution is poured into the container, the rotating disc adhered with the friction film is placed in the container for equilibrium adsorption, and one side of the friction film faces upwards; the turntable is turned over to enable one side of the friction film to face downwards to form a friction pair with the friction bottom plate, and the turntable is started to rotate for friction catalysis to realize degradation of organic pollutants. The conductivity of polyaniline is combined with the piezoelectric and chiral characteristics of chiral polylactic acid, a flexible friction film is obtained through a solution casting method, the flexible friction film and a friction bottom form a friction pair, active free radicals are generated through the triboelectric effect, high-concentration organic pollutants are efficiently degraded, and environment-friendly and efficient pollutant degradation at normal temperature and pressure is achieved.

The invention discloses a gas-solid triboelectrification test method and device for a moving object, and relates to the technical field of triboelectrification measurement, and the method comprises the following steps: constructing a sample ball and gas triboelectrification model in a free falling process of a sample ball in a glove box with a built-in Faraday cage based on a Maxwell velocity distribution rule; carrying out standardized pretreatment on the sample small balls to remove residual charges on the surfaces of the sample small balls; performing air replacement in the glove box with the built-in Faraday cage until the internal air pressure and environmental parameters meet the test requirements, and determining the diameter range and the falling height of the sample small ball; filtering the electrostatic charge signal, reading the electrostatic charge quantity of the small sample ball at different falling heights, and determining the charge quantity increased by the small sample ball in the free falling process of the glove box with the built-in Faraday cage; the gas-solid friction electrification quantity of the moving object under the influence of the object moving speed, the effective friction area and the environment air pressure factor is measured in a non-contact mode.

The invention discloses a friction nanometer generator. The friction nano-generator comprises a magnetic square vibrator, which is used for generating micro-amplitude vibration in a low-intensity magnetic field environment; the stator electrode and the stator electrode electrification layer and the mover electrode and the mover electrode electrification layer are used for forming a frictional electric contact-separation process; the spring structure is used for connecting the magnetic square vibrator with the mover electrode and the mover electrode electrification layer so as to amplify micro-amplitude vibration to an amplitude sufficient to generate a triboelectric effect; the fixing bracket is used for supporting and fixing the stator electrode and the stator electrode electrification layer and is connected with the spring structure; and the circuit module is used for processing the electric energy generated by the friction nano-generator, so that the friction nano-generator is suitable for energy storage and load driving. According to the invention, the technical problem of low energy power supply efficiency easily caused by insensitive response to complex magnetic field distribution and unstable energy output of a friction nanometer generator in a weak magnetic field environment in the prior art is solved.

This invention provides an additively manufactured leaf-like three-source composite energy harvesting device, belonging to the field of new energy and self-powered technology. The device includes a leaf-vein-like support substrate integrally formed by 3D printing, and integrated on it a droplet triboelectric unit, a piezoelectric conversion unit, and a photovoltaic conversion unit. Liquid-guided stripes on the surface of the leaf-vein-like support substrate optimize droplet spreading. The droplet triboelectric unit captures the mechanical energy of the droplet through the triboelectric effect of the bottom electrode, the triboelectric dielectric layer, and the top electrode. The piezoelectric conversion unit converts the substrate vibration into electrical energy. The photovoltaic conversion unit efficiently collects solar energy. These three units work together to achieve synchronous or time-sharing capture of the droplet impact mechanical energy and solar energy, and output stable electrical energy through a power management circuit. This invention features a compact structure, high integration, and simple fabrication process. It can operate in all weather conditions and is suitable for long-term self-powered scenarios such as IoT terminals, distributed sensor network nodes, and wearable electronic devices.

This application discloses an online detection system, method, and related equipment for internal defects of hot-rolled sheet metal, relating to the field of intelligent detection technology in metal rolling. The system includes a high-temperature resistant triboelectric roller probe for rolling contact with the surface of the hot-rolled sheet metal to generate a raw electrical signal through the triboelectric effect; a signal processing module connected to the high-temperature resistant triboelectric roller probe for acquiring the raw electrical signal and processing it to obtain a preprocessed signal; and an internal defect detection module connected to the signal acquisition and processing module for receiving the preprocessed signal and detecting it based on a target deep learning model to determine the diagnostic result of internal defects in the hot-rolled sheet metal.

The invention discloses a differential vibration sensor, and particularly relates to the technical field of sensors. The differential vibration sensor comprises a shell assembly and a base connected with the outside of the shell assembly, the static plate assembly is fixed in the shell assembly through a plurality of fixing screws; the two moving plate assemblies are symmetrically arranged on the upper side and the lower side of the static plate assembly respectively, and each moving plate assembly comprises a moving electrode layer; the two elastic bodies are arranged on the outer sides, back to the static plate assembly, of the two movable plate assemblies respectively; wherein the static plate assembly comprises a static electrode layer, the static electrode layer and the moving electrode layer are oppositely arranged, and a gap is formed between the static electrode layer and the moving electrode layer to form a triboelectric effect structure; a plurality of guide studs are further fixed to the static plate assembly, and a guide hole is formed in the movable plate assembly. The differential vibration sensor provided by the invention realizes self-power supply by using a triboelectric effect, and does not need an external power supply.

The invention relates to the technical field of intelligent door and window control and environment perception, in particular to an intelligent electric window device based on self-powered raindrop friction sensing, which comprises a window body used for realizing the opening and closing function of a window foundation; the monitoring mechanism can realize self power supply based on the triboelectric effect; the monitoring mechanism is at least used for monitoring the outdoor rainfall state in real time, generating a sensing signal and generating an effective trigger signal when the rainfall capacity reaches a preset threshold value. The state recognition mechanism is used for recognizing the opening and closing state of the window and feeding back a state signal; and the driving mechanism is used for receiving a trigger signal of the monitoring mechanism and a state signal of the state recognition mechanism so as to drive the window to execute opening and closing actions. The intelligent electric window device based on self-powered raindrop friction sensing disclosed by the invention can effectively solve the problems of passivity, single function, short endurance, insufficient monitoring precision and the like when an existing window product is used for coping with a complex environment scene.

The invention discloses a self-driven multifunctional sensor for an artificial hand wrist. An angle-speed detection mechanism and a pulse measuring ring are integrated; the angle detection mechanism is composed of a first rotor disc, a fixed stator disc and a friction layer, the first rotor disc and the fixed stator disc can rotate relatively, and sine electric signals corresponding to angle changes are output when the wrist bends and stretches based on the friction electrification effect. The speed detection mechanism generates a characteristic cycle electric signal related to the rotating speed through friction between a second rotor disc and a fixed electrode disc with a specific electrode; the pulse measuring ring is integrated on the inner side of the watchband, and the built-in flexible piezoelectric sensing module is tightly attached to the radial artery of the wrist, so that pulse fluctuation can be directly detected; the whole device does not need an external power supply, can generate sensing signals in a self-driven mode through mechanical friction and pulse pressure, and synchronously achieves simultaneous measurement of the wrist angle, the rotating speed and the pulse signals by means of a four-channel high-speed electrical measuring instrument and a multi-channel serial port circuit.

This invention discloses a self-generating wireless truck wheel hub temperature monitoring system, including a truck suspension vibration power generation device with a composite energy conversion coordination mechanism, and a matching wireless truck wheel hub temperature monitoring scheme. The device achieves self-powering for the temperature monitoring and wireless signal transmission system through an energy harvesting device installed on the truck suspension. The system mainly includes an antenna integrated with the truck suspension, a signal processing module, a self-generating module, and a temperature sensor. The self-generating module includes an electromagnetic power generation structure and a piezoelectric power generation structure. Combining electromagnetic induction, piezoelectric effect, triboelectric effect, and the multidirectional and nonlinear forces generated by the spring and arched beam structure, it broadens the energy harvesting bandwidth. The combination of the two power generation modules achieves broadband composite energy harvesting. The composite self-generating module powers the monitoring system, and the integrated signal processing circuit is responsible for power management and wireless transmission of temperature signals, improving the safety of truck operation.

In a vacuum cleaner unit (2) comprising a core (17), the core (17) comprises a clean air discharge device (10) and an annular air vortex chamber (11), the core (17) is configured to prevent static electricity accumulation at a location of at least a portion of an outer surface (18) of the core (17). In this way, a beneficial effect on the separation performance of the unit (2) is obtained. According to one actual choice, the core (17) comprises, at least at the location of the outer surface (18), a material configured to not allow the generation of a triboelectric effect by the friction or sliding of dirt particles against the outer surface (18). According to another actual choice, an electrically conductive material is used in the core (17), may be used in the exterior trim layer of the core (17), such that charge may be directed away from the outer surface (18).

This invention discloses a spherical plain bearing and a method for monitoring the condition of the spherical plain bearing based on the triboelectric effect. The spherical plain bearing includes an outer ring, an inner ring, a self-lubricating gasket, and a wear-resistant coating. The inner ring is located inside the outer ring, the outer ring has a first surface facing the inner ring, and the inner ring has a second surface facing the outer ring. The self-lubricating gasket is conductive and is located on one of the first and second surfaces. The wear-resistant coating has semiconductor properties and is located on the other of the first and second surfaces. The self-lubricating gasket and the wear-resistant coating are in contact. The inner and outer rings move relative to each other, causing the self-lubricating gasket and the wear-resistant coating to rub against each other and output a DC signal. This invention can generate a DC signal through friction during the relative movement of the inner and outer rings, and then reflect the operating state of the spherical plain bearing through the characteristic parameters of the DC signal, achieving real-time condition monitoring. It features high integration, high signal-to-noise ratio, and reliable monitoring data.

The invention provides a light-emitting flexible sensing electronic skin device and a manufacturing method, and relates to the technical field of electronic skin devices. The light-emitting flexible sensing electronic skin device comprises a light-emitting nanofiber layer and is prepared by an electrostatic spinning process; the hydrogel substrate is prepared through a chemical cross-linking polymerization method. According to the invention, through an electrostatic spinning one-step forming technology, a friction material and luminescent particles are co-doped, the problems of interlayer charge transfer loss and light absorption are avoided, the luminescent efficiency and the structural stability are obviously improved, ZnS: Cu realizes high transient luminescence through a triboelectric effect, BaS i2O2N2: Eu excites long afterglow luminescence through mechanical stress, and the luminescent efficiency is greatly improved. And the two collaboratively expand the application scene of the device in dynamic sensing.

The invention belongs to the technical field of acoustic functional materials and devices, and discloses a multifunctional acoustic device with broadband sound insulation and acoustic-electric conversion, which comprises a sound insulation unit, a support ring arranged on the front surface of the sound insulation unit, and a frictional electricity energy acquisition unit arranged on the support ring, the sound insulation unit comprises a multi-local-area resonance substrate, a polyimide film and a mass block assembly, the multi-local-area resonance substrate is divided into a center bending structure, a double-bending structure and a single-bending structure, the center bending structure drives a center mass block to vibrate in a reciprocating mode, so that the FEP film and the silica gel film are in periodic contact-separation, and the single-bending structure drives the center mass block to vibrate in a reciprocating mode; alternating current charge transfer is generated between the aluminum foil and the conducting layer, acoustic-electric conversion is achieved, and the three bending structures are coupled with the polyimide film and the mass block assembly. According to the invention, a plurality of effective sound insulation bands are formed in a low-frequency area based on the multi-local resonance structure and are used for inhibiting low-frequency sound propagation; and meanwhile, acoustic-electric energy conversion is realized by utilizing a triboelectric effect, and incident low-frequency acoustic energy is converted into electric energy.

The invention relates to a dynamic pressure gas thrust bearing based on a non-contact rotary electrostatic generator and a monitoring method, and aims to solve the problem that bearing operation state parameters are difficult to measure, the dynamic pressure gas thrust bearing comprises a static ring assembly and a dynamic ring assembly, and the static ring assembly and the dynamic ring assembly are oppositely arranged in parallel; the static ring assembly comprises a bearing static ring, a static ring insulating layer and a static ring electrode layer, the insulating layer is arranged between the bearing static ring and the static ring electrode layer, the static ring electrode layer comprises a plurality of first electrodes and second electrodes, and the first electrodes and the second electrodes are arranged in a staggered mode in the circumferential direction; pET film layers are arranged on the outer surfaces of the first electrode and the second electrode, the moving ring assembly comprises a metal electrode layer, a moving ring insulating layer and a bearing moving ring, and the moving ring insulating layer is arranged between the bearing moving ring and the metal electrode layer. The triboelectric effect is combined with the gas bearing, high-speed, multi-parameter and in-situ monitoring is achieved through the non-contact electrode design, and the limitation of a traditional method in a closed environment and a high-speed scene is solved. The invention relates to the technical field of bearings.

The invention discloses a self-power-generation wireless truck hub temperature monitoring system which comprises a truck suspension vibration power generation device of a composite energy conversion cooperation mechanism and a matched wireless truck hub temperature monitoring scheme. According to the device, self-power supply of a temperature monitoring and wireless signal transmission system is realized through an energy collection device arranged at the suspension position of the truck. The system mainly comprises an antenna combined with a truck suspension, a signal processing module, a self-generating module and a temperature sensor. The self-power-generation module comprises an electromagnetic power generation structure and a piezoelectric power generation structure, the frequency band of energy collection is widened by combining electromagnetic induction, the piezoelectric effect, the triboelectric effect and multi-direction and non-linear force brought by a spring and an arched beam structure, and broadband composite energy collection is achieved through combination of the two power generation modules. The composite self-generating module supplies power to the monitoring system, the integrated signal processing circuit is responsible for electric energy management and wireless transmission of temperature signals, and the safety of truck driving is improved.

The invention relates to a method for separating, in batches, a mixture comprising granules of at least two materials, comprising the following successive steps for each of the batches:introducing a batch into a fluidizing chamber (40) defined by a reactor (16) and obtaining an introduced batch (38),the granules of the batch being initially at rest, starting fluidization and obtaining at least one fluidized bed (18) in the fluidizing chamber, the fluidization being achieved by way of at least one ascending stream of fluid (42) that puts at least a fraction of the granules of the introduced batch into suspension, the fluidized bed being charged via the triboelectric effect,modifying the stream of fluid (42) and discharging at least 90% by mass of the introduced batch from the fluidizing chamber,passing the fed out batch in one or more electric fields intended to separate the discharged batch.

This invention relates to a composite power-generating yarn based on the synergistic effect of triboelectric and piezoelectricity and its preparation method. The yarn includes an electrode core layer and a friction layer encasing the electrode core layer; the electrode core layer is pure copper wire; the friction layer includes a ZnO / PVA adhesive layer, a modified BaTiO3 / PVDF conjugate electrospun layer, and a modified TiO2 / PTFE / PDMS coating. This preparation method utilizes the synergistic effect of the piezoelectric effect of the ZnO / PVA adhesive layer and the modified BaTiO3 / PVDF conjugate electrospun layer, as well as the triboelectric effect of the modified BaTiO3 / PVDF conjugate electrospun layer and the modified TiO2 / PTFE / PDMS coating, to achieve significantly better electrical output performance than a single working mechanism, thus realizing efficient collection and conversion of mechanical energy. A 5cm length of this yarn can achieve an output voltage of 23.5V in single-electrode mode (frequency 3Hz, pressure 25N), enabling self-powered applications such as lighting a calculator and charging a capacitor. This yarn has the processing compatibility to be directly woven into various fabric structures, providing a large-scale in-situ energy harvesting pathway for apparel, home textiles and industrial textiles.

According to the nanofiber membrane capable of driving charge regeneration through sound, the preparation method and the charge regeneration method, the prepared nanofiber membrane can adopt a sound field excitation technology, and an endogenous triboelectricity effect is induced and generated by exciting nanofiber vibration, so that lost charges of the nanofiber membrane are recovered, and effective regeneration of filtering performance is achieved. On the basis of the non-contact characteristic of the sound field, charge regeneration can be completed on the premise of not damaging the nanofiber network structure, and the durability and reliability of the function of the filtering material are ensured. The nanofiber membrane prepared by the invention not only has efficient filtering capacity, but also has excellent reusability, can be suitable for ventilation systems in places such as industrial production, pharmacy, medical treatment and the like, and application scenes such as personal protection, natural gas transmission and the like, thereby having wide application prospects.

This invention discloses a multi-sensor smart finger based on triboelectric effect, its usage method, and applications. It includes a first phalanx covered with a first friction sensing mechanism; a second phalanx internally encapsulating a second friction sensing mechanism; a third phalanx internally encapsulating a microprocessor chip and a third friction sensing mechanism; a connecting joint, shaped like a turntable, connecting the end of the first phalanx to the front end of the second phalanx and connecting the end of the second phalanx to the front end of the third phalanx; a fourth friction sensing mechanism on the contact surfaces of the two connecting joints; a servo motor mounting bracket located at the ends of the first and second phalanxes; and a signal processing circuit connecting the microprocessor chip to the first, second, third, and fourth friction sensing mechanisms via wires. This invention can achieve multi-channel information sensing and has the advantages of small size and high flexibility. Furthermore, this invention can also achieve the effect of human motion or environmental monitoring.

The application relates to a composite power generation yarn based on a triboelectric-piezoelectric synergistic effect and a preparation method thereof. The electric yarn comprises an electrode core layer and a friction layer wrapping the electrode core layer. The electrode core layer is a pure copper wire. The friction layer comprises a ZnO / PVA adhesive layer, a modified BaTiO3 / PVDF conjugate electrospun layer and a modified TiO2 / PTFE / PDMS coating layer. The preparation method realizes the high-efficiency collection and conversion of mechanical energy by the piezoelectric effect of the ZnO / PVA adhesive layer and the modified BaTiO3 / PVDF conjugate electrospun layer and the triboelectric effect of the co-modified BaTiO3 / PVDF conjugate electrospun layer and the modified TiO2 / PTFE / PDMS coating layer, so that the electric output performance of the yarn is obviously better than that of a single working mechanism. The output voltage of the yarn with a length of 5 cm can reach 23.5 V under a single electrode mode (frequency 3 Hz, pressure 25 N), and the self-powered applications such as calculator lighting and capacitor charging can be realized. The yarn has the processing compatibility of being directly woven into various fabric structures, and provides a large-scale in-situ energy collection way for clothing, home textiles and industrial textiles.

This application discloses an elastic triboelectric yarn based on a loop reed weaving structure and its preparation method, relating to the field of smart textiles and clothing. The elastic triboelectric yarn prepared using the method described in this application forms a basic reed hole structure within the loop reed elastic yarn group, which is key to achieving elastic elongation. Two elastic triboelectric yarns with different electronegativity in the power-generating yarn group are inserted into the reed hole structure according to a certain pattern, forming a multi-level loop reed structure. Under the action of various forces such as stretching and compression, the elastic triboelectric yarn generates electricity through the frictional effect of the elastic triboelectric yarns during contact and separation. While ensuring good tensile performance, it achieves self-generating power, enabling independent power generation from a one-dimensional single yarn. This compensates for the lack of self-powered power in the wearable industry. Furthermore, the resulting elastic triboelectric yarn has good tensile performance, high power generation stability, good durability, and light weight, making it suitable for wearable smart devices such as defibrillator vests, ECG sports clothing, and smart health care clothing.

This invention discloses a spherical plain bearing and a bearing condition monitoring method based on the triboelectric effect. The spherical plain bearing includes an outer ring, an inner ring, and a self-lubricating gasket. The inner ring is located inside the outer ring. The outer ring has a first surface facing the inner ring, and the inner ring has a second surface facing the outer ring. The self-lubricating gasket is modified to possess semiconductor properties. The self-lubricating gasket is disposed on one of the first and second surfaces. The other surface is in contact with and movable relative to the self-lubricating gasket. The relative movement of the inner and outer rings rubs the self-lubricating gasket and outputs a DC signal. This invention can acquire the DC signal generated by friction of the spherical plain bearing at different oscillation frequencies, thereby reflecting the operating state of the spherical plain bearing and achieving real-time monitoring.

Aspects of triboelectric fibers and methods of manufacture of the fibers are described. In one example, a method of manufacture of a fiber for generating energy using the triboelectric effect includes forming a preform tube, heating the preform tube in a furnace, feeding a wire through the preform tube and the furnace during the heating, and pulling the wire through the furnace to form a fiber. The methods described herein can be relied upon to manufacture fibers long enough for industrial-scale textile manufacturing, including for use with industrial-scale looms. In one example, forming the preform tube can include providing a polypropylene tube and wrapping the polypropylene tube with a housing layer of amorphous film, such as acrylic film. The acrylic film can be relied upon to maintain the form and integrity of the polypropylene as the wire is pulled, and the acrylic film can be easily removed after the pulling.

Protective suit for harsh environments made of a fabric containing at least one triboelectric nanogenerator comprising at least one low electronegativity layer and at least one high electronegativity layer, wherein friction between the layers generates voltage pulses whose amplitude and waveform depend on the frequency, speed, acceleration, force, and displacement of said layers, and wherein the fabric further comprises sensors configured to collect the voltage pulses emitted by friction between the high and low electronegativity layers of the triboelectric nanogenerator.

This utility model discloses a flexible antistatic protective film, relating to the field of antistatic protective films. The utility model includes a base layer, the surface of which is covered with a surface layer. The surface of the surface layer is formed into a protective surface by stamping. The protective surface is a conical array, and a conductive layer is coated on the protective surface. This utility model increases the surface roughness by forming a conical array of protective surfaces through stamping. This increased roughness makes the contact area more dispersed when the surface layer comes into contact with other objects, thereby reducing the concentration of local frictional forces and effectively reducing triboelectric effects. Simultaneously, by reducing triboelectric effects through physical structural design, it reduces reliance on traditional chemical antistatic agents. This physical method is not only environmentally friendly but also reduces the pollution and allergy problems that may arise from chemical antistatic agents.

A protective cover for electronic enclosures or similar items, comprising at least one low-electronegativity layer and at least one high-electronegativity layer, exhibiting high electromagnetic radiation shielding, capable of generating electricity via the triboelectric effect, and potentially flame-retardant. The cover may also incorporate elements such as metallic nanoparticles and metallic electrodes to further enhance shielding, as well as flame-retardant elements.

The application provides a 4D printed bone tissue scaffold with adjustable microenvironment and a preparation method and application thereof, and relates to the technical field of bone repair. The 4D printed bone tissue scaffold with adjustable microenvironment comprises a scaffold structure and a film covering the surface of the scaffold structure, and the scaffold structure is provided with holes; under the condition that the scaffold structure is deformed under stress, the holes are configured to switch between a contact state and a separation state. During the deformation of the scaffold structure under stress, the holes can switch between the contact state and the separation state, generate a triboelectric effect, and further generate a micro-current, so as to construct a physical microenvironment conducive to cell growth, and further conducive to the regeneration of damaged bone tissue; as a mechanical wave, ultrasound provides additional mechanical stimulation at the bone defect site, can make the scaffold structure deform under stress, and can also make the scaffold structure generate a piezoelectric effect and a triboelectric effect, induce the generation of a micro-current on the surface of the scaffold structure, and thus construct a physical microenvironment conducive to cell growth, and further conducive to the regeneration of damaged bone tissue.

The invention relates to a method for the electrostatic separation of particles from a mixture of particles, said mixture comprising particles of a first material and particles of at least one second material, the method comprising at least: a preliminary conditioning step in which the mixture of particles is carried through a dry turbulent airflow passing through a tube (40) of the same material as the first material, the tube extending over a length greater than 50 m, preferably greater than 100 m, so as to cause the particles of the mixture of particles to collide with each other and with the tube and to electrically charge at least the particles of the second material by triboelectric effect; and then a separation step in which the mixture of particles is dropped into an electric field (E) generated by a set of electrodes (62), so as to separate the particles of the first material from the particles of the second material. (Fig. 1)