357 results about "Active electrode" patented technology

Methods and systems for testing and treating spinal cord stimulation (SCS) patients are disclosed. Patients are eventually treated with sub-perception (paresthesia free) therapy. However, supra-perception stimulation is used during “sweet spot searching” during which active electrodes are selected for the patient. This allows sweet spot searching to occur much more quickly and without the need to wash in the various electrode combinations that are tried. After selecting electrodes using supra-perception therapy, therapy is titrated to sub-perception levels using the selected electrodes. Such sub-perception therapy has been investigated using pulses at or below 10 kHz, and it has been determined that a statistically significant correlation exists between pulse width (PW) and frequency (F) in this frequency range at which SCS patients experience significant reduction in symptoms such as back pain. Beneficially, sub-perception stimulation at such low frequencies significantly lowers power consumption in the patient's neurostimulator.

An electrosurgical device is disclosed for creating a channel through a region of tissue within a patient's body using radiofrequency (RF) energy. The electrosurgical device is configured to have an outer diameter that is smaller than conventional RF wires. The electrosurgical device further includes an elongated active electrode tip, which provides enhances visualization capabilities. The low-profile electrosurgical device is capable of traversing narrow blood vessels, such as those in the peripheral vasculature. An electrically insulative thermal shield is disposed between the active electrode tip and an insulated proximal region. A rigidity component and a reinforcement structure are disposed proximal to the thermal shield. The components being formed on a core wire having reduced diameter distal region.

The embodiment of the invention relates to the technical field of electroencephalogram signal processing and brain-computer interfaces, and provides a rigid-flex active electrode device, equipment and a system. The device comprises a reference electrode, a bias driving electrode module, a first movable electrode module, a second movable electrode module, a third movable electrode module, a fourth movable electrode module, a fifth movable electrode module, a sixth movable electrode module, a seventh movable electrode module, an eighth movable electrode module and an interface module, the reference electrode comprises a buffer drive circuit and a wet electrode plate, and the signal-to-noise ratio of collected electroencephalogram signals can be increased.

The invention discloses a C: GaN gate enhanced HEMT (High Electron Mobility Transistor) device and a preparation method thereof, the device comprises a substrate layer, a nucleating layer, a high-resistance buffer layer, a back barrier layer, a GaN channel layer, an insertion layer and a barrier layer which are sequentially arranged from bottom to top, and a C-doped C: GaN cap layer and a TiN metal layer are sequentially arranged in the middle of the upper surface of the barrier layer; two sides of the upper surface of the barrier layer respectively comprise a first ion implantation region and a second ion implantation region; a source electrode and a drain electrode are arranged on the inner sides of the first ion implantation region and the second ion implantation region respectively, and the lower surfaces of the source electrode and the drain electrode are both in contact with the GaN channel layer; passivation layers are arranged on the upper surfaces of the TiN metal layer and the barrier layer and on the two sides of the C: GaN cap layer, and a gate electrode is arranged on the upper surface of the C: GaN cap layer. By arranging the C: GaN cap layer and the back barrier layer, the grid electric leakage is effectively reduced, the positive withstand voltage of the grid is improved, and an enhanced device with stable threshold voltage is obtained.

The invention provides a head-mounted diagnosis and treatment device, a brain-computer interface system and a brain activity monitoring intervention method. The head-mounted diagnosis and treatment device comprises a head-mounted structure, at least one active electrode, at least one pair of stimulation electrodes and a control module, the head-mounted structure comprises a head beam supporting part and a frontal lobe wearing part, the two ends of the frontal lobe wearing part are connected with the two opposite sides of the head beam supporting part respectively, and the active electrode is arranged on the inner side of the frontal lobe wearing part. The active electrode is arranged on the head beam supporting part and used for collecting electroencephalogram signals of a frontal lobe area contact part, the stimulation electrode is arranged on the inner side of the head beam supporting part and used for forming electrical stimulation on the frontal lobe area contact part, and the control module is electrically connected with the active electrode and the stimulation electrode and used for determining the brain function state according to the electroencephalogram signals collected by the active electrode and controlling the stimulation electrode according to the determined brain function state. Thus, electrical stimulation therapy is formed. According to the head-mounted diagnosis and treatment device, the brain-computer interface system and the brain activity monitoring intervention method, diagnosis and treatment can be integrated, and the head-mounted diagnosis and treatment device is easy to wear and portable.

The invention relates to a charging type moisture power generation device based on a double-layer polymer film and a preparation method thereof, and belongs to the technical field of moisture power generation. Comprising an active electrode, double-layer polymer films and an inert porous electrode which are sequentially arranged, the first polymer film of the double-layer polymer films is a mixture of ferric hydroxide, polystyrolsulfon acid and polyvinyl alcohol, the second polymer film of the double-layer polymer films is poly (diallyldimethylammonium chloride), the first polymer film is in contact with the active electrode, and the second polymer film is in contact with the inert porous electrode. The second layer of polymer film is in contact with the inert porous electrode; the active electrode is made of metal with the standard electrode potential ranging from-1 V to + 0.5 V, and the inert porous electrode is made of metal with the standard electrode potential larger than + 1 V. Through moisture evaporation and an oxidation-reduction reaction, the battery can generate electricity by itself in a moisture environment, and can be self-repaired through the oxidation-reduction reaction when the performance is reduced, so that a charging effect is achieved.

A filtered feedthrough comprises an insulator sealed in a ferrule opening. A terminal pin sealed in an insulator via hole has a first end that extends outwardly beyond an insulator device side. A filter capacitor adjacent to the insulator device side has a dielectric supporting interleaved active and ground electrode plates. A passageway extending through the dielectric has an internal metallization. An external metallization is on a terminated portion as opposed to an unterminated portion of the dielectric outer surface. The capacitor ground electrode plates extend to the external metallization at the terminated portion, but they do not extend to the unterminated outer surface portion. The outwardly extending terminal pin end is connected to the internal metallization in the dielectric passageway which in turn is connected to the active electrode plates. A conductive material connects the capacitor external metallization at the terminated dielectric outer surface portion to a system ground.

Provided are active electrodes (AE) and methods for obtaining a neurological signal of a subject. The active electrode configured to be disposed of on the head of the subject and communicatively connected to one or more of another electrode and a backend. The active electrode includes a conductive element mounted to an AE board and disposed in contact with a skin of the subject, a second stage amplifier for amplifying the obtained signal, and a calibration module for calibrating coefficients. In some embodiments, the AE further includes a CMR boosting module for boosting CMR rejection. In some embodiments the AE includes an artifact removal module for removing motion artifacts.

A pass-through electrode device includes a tubular member including a proximal end, a distal end sized for introduction into a patient's body, a lumen extending between the proximal end and the distal end, and one or more pass-through electrodes on the distal end. Each pass-through electrode includes an outer portion on an outer wall of the tubular member, an inner portion exposed within an inner wall of the lumen, and is passive, e.g., electrically isolated and / or unconnected to other electrodes or components of the device. A system is also provided that includes an outer tubular member including one or more pass-through electrodes and a procedure device introducible through and deployable from the tubular member for performing a procedure, e.g., mapping and / or ablation. The procedure device includes one or more active electrodes that may be aligned with pass-through electrodes when the device is at least partially positioned within the outer member.

The invention relates to active electrode materials and to methods for the manufacture of active electrode materials. Such materials are of interest as active electrode materials in lithium-ion or sodium-ion batteries. The invention provides an active electrode material expressed by the general formula [M1]x[M2](1−x)[Nb]y[O]z, wherein: M1 and M2 are different; M1 represents one or more of Ti, Mg, V, Cr, W, Zr, Mo, Cu, Fe, Ga, Ge, Ca, K, Ni, Co, Al, Sn, Mn, Ce, Te, Se, Si, Sb, Y, La, Hf, Ta, Re, Zn, In, or Cd; M2 represents one or more of Mg, V, Cr, W, Zr, Mo, Cu, Ga, Ge, Ca, K, Ni, Co, Al, Sn, Mn, Ce, Sb, Y, La, Hf, Ta, Zn, In, or Cd; and wherein x satisfies 0<x<0.5; y satisfies 0.5≤y≤49 z satisfies 4≤z≤124.

Aspects of the disclosure include an electrode calendering system having an electrode foil wrinkle remover band and a process for manufacturing electrodes using the same. An exemplary system includes a top roll press and a bottom roll press separated from the top roll press by a gap. The gap includes a distance selected to accommodate a current collector having a bare portion and a coated portion having thereon an active electrode material of a first thickness. The system further includes a wrinkle remover band having a second thickness selected, based on the first thickness, to evenly distribute stress across the bare portion and the coated portion of the current collector during a calendering process for forming a pressed electrode.

A system and method for delivering ocular microstimulation therapy includes one or more active electrodes near the anterior part of the eye, one or more return electrodes on the patient, and a controller configured to generate electrical signals (e.g., anodal monophasic or biphasic pulses) with defined amplitude, current density, polarity, frequency, and duty cycle. The total electrode contact area is between about 1.5 cm2 and about 4 cm2. In some methods, the stimulation can be divided into subphases or varied in ramped or randomized patterns to reduce habituation. A therapy regimen can span multiple sessions, with data structures specifying session dates and modes, and whether treatment is unilateral or bilateral. Safety features detect hazardous reductions in electrode contact area.

A radiofrequency (RF) generator for use in a tissue puncture system for puncturing a tissue in a body is disclosed. The RF generator includes an RF energy source to couple to an active electrode of an RF puncture device and to couple to a return electrode and a controller coupled to the RF energy source. The controller causes the RF energy source to generate each of a puncture signal and a test signal, the test signal having a lower power than the puncture signal, measures an impedance of the test signal, determine a state of the active electrode based on the impedance measurement, and displays the state on a display device.

A magnetic alignment device includes a first magnet part and a second magnet part, a thickness measuring part, and a control part. The first and second magnet parts accommodate an electrode sheet therebetween and the thickness measuring part measures a thickness of a negative electrode slurry disposed on the electrode sheet. The control part adjusts the separation distance of the first and second magnet parts. The magnetic alignment device measures the thickness of the negative electrode slurry applied on the negative electrode current collector in real time and controls the intensity of the magnetic field by adjusting the separation distance of the magnet part according to the measured negative electrode slurry thickness, and has an advantage of uniformly high alignment degree of the crystal faces of the carbon-based negative electrode active material contained in prepared negative electrode active layer.

The invention belongs to the technical field of inorganic non-metallic materials, electrochemistry, material chemistry and chemical power supply products, and particularly relates to a single-phase niobate and an active electrode material of a lithium ion battery as well as a preparation method and application of the single-phase niobate and the active electrode material. The single-phase niobate provided by the invention has a chemical formula of TixNbyOz (0.15 < = x / z < = 0.25 and 0.20 < = y / z < = 0.28) and has the characteristics of more titanium and less niobium. The single-phase niobate provided by the invention is prepared by adopting a liquid phase method based on a precursor solution, can be properly post-processed, has high safety performance, specific capacity, first-week coulombic efficiency, rate capability, cycle performance and temperature adaptability when being used for a negative electrode of a lithium ion battery, and is relatively low in cost. The preparation method of the active electrode material provided by the invention is simple, and the active electrode material has a wide application prospect in the field of ultra-fast charging and high-power lithium ion batteries. More choices are provided for the active negative electrode material of the lithium ion battery, and rapid development of the high-performance lithium ion battery can be greatly promoted.

The invention belongs to the field of material synthesis, and particularly relates to a method for preparing an electrode by processing nanoparticles on a polymer skeleton or a surface by using femtosecond laser, which is used for solving one of the problems that a catalyst used by a fuel cell membrane electrode is low in utilization rate and a preparation method is complicated. The method comprises the following steps: preparing a precursor solution; a substrate material is fixedly arranged at the bottom of a liquid container, and the precursor solution is added into the liquid container; irradiating the interface of the substrate material and the precursor solution with femtosecond laser to obtain a substrate material loaded with metal particles; wherein the precursor solution contains metal acid radical ions; the substrate material is a high polymer material; according to the femtosecond laser parameters, the wavelength is 800 nm or 1030 nm, the laser power ranges from 100 mW to 500 mW, the machining scanning speed ranges from 50 micrometers / s to 500 micrometers / s, and the machining time ranges from 5 min to 30 min; the substrate material loaded with the metal particles is an electrode material with catalytic activity. The preparation method is simple, and the uniformity and strength of the loaded metal particles are improved.

A filtered feedthrough comprises an insulator sealed in a ferrule opening. A terminal pin sealed in an insulator via hole has a first end that extends outwardly beyond an insulator device side. A filter capacitor adjacent to the insulator device side has a dielectric supporting interleaved active and ground electrode plates. A passageway extending through the dielectric has an internal metallization. An external metallization is on a terminated portion as opposed to an unterminated portion of the dielectric outer surface. The capacitor ground electrode plates extend to the external metallization at the terminated portion, but they do not extend to the unterminated outer surface portion. The outwardly extending terminal pin end is connected to the internal metallization in the dielectric passageway which in turn is connected to the active electrode plates. A conductive material connects the capacitor external metallization at the terminated dielectric outer surface portion to a system ground.

The invention relates to the technical field of electrodes for vanadium batteries, in particular to a preparation method of a catalytically active electrode for a vanadium battery, the catalytically active electrode and application of the catalytically active electrode. The preparation method comprises the following steps: loading a bismuth oxide water-phase dispersion liquid as a precursor on the surface of a graphite felt electrode substrate, placing the graphite felt electrode in an inert atmosphere to carry out a carbon thermal reduction reaction, and carrying out a solid-phase reaction on bismuth oxide and the graphite felt carbon substrate in the inert atmosphere to generate a strongly combined catalytic active site in situ. By pertinently controlling the concentration of the bismuth oxide water-phase dispersion liquid and the temperature of the carbon thermal reduction reaction, active components in the prepared catalytic active electrode for the vanadium battery are uniformly and firmly combined on the surface of a matrix, and high uniformity and high stability are shown. And meanwhile, a loading-first and one-step carbon thermal reduction method is adopted, so that large-scale production can be realized, the electrochemical activity of the product is effectively improved, the uniformity and consistency of the performance can be realized, and the multi-dimensional strict requirements of commercial production on the electrode performance and the manufacturing efficiency are effectively met.

The utility model discloses an integrated electrode and a flow battery, the integrated electrode comprises a flow guide substrate and a reaction active electrode material wrapping the outer surface of the flow guide substrate, the reaction active electrode material is a flexible structure, the flow guide substrate comprises concave areas and convex areas which are alternately arranged, and the concave areas and the convex areas are arranged on the outer surface of the flow guide substrate. The inner side of the concave area and the back side of the convex area form an electrolyte flow channel, the electrolyte flow channel is provided with an electrolyte inlet and an electrolyte outlet which are exposed to the outer side of the reactive active electrode material, and the flow channel wall of the electrolyte flow channel is provided with a flow guide hole for guiding the electrolyte towards the reactive active electrode material; and the reaction active electrode material and the diversion substrate are relatively fixed to form an integrated structure of electrolyte circulation and electrochemical reaction. According to the scheme, efficient flowing of the electrolyte is guaranteed, a stable reaction interface is provided, concentration polarization is reduced, the battery efficiency is improved, meanwhile, the flow guide substrate is convenient to grab by a mechanical clamping jaw, and full-automatic stack assembly is supported.

Systems and methods of the various embodiments may provide bifacial sealed gas diffusion electrode (GDE) assemblies. In some embodiments, a bifacial sealed gas diffusion electrode (GDE) assembly includes active electrode layers on two opposing sides of the assembly. Various embodiments may provide architecture and / or sealing methods for GDE assemblies. In various embodiments, the GDE assemblies may be for use in devices. In various embodiments, the devices may be primary or secondary batteries. In various embodiments, these devices may be useful for energy storage. For example, bifacial sealed GDE assemblies of the various embodiments may form cathode electrodes (sometimes called air electrodes) of a battery, such as a metal-air battery.

According to one aspect, the present description relates to a portable device (10) for acquiring electroencephalographic (EEG) signals emitted by a user. The portable device comprises a flexible support (11) intended to fit a localized region of the skull of the user and a set of sensors (13) of electrical signals generated by the neuronal activity of the user, arranged on said support (11) so as to form contacts with the scalp when the device is worn by the user. For each sensor, an electronic circuit for filtering and amplifying electrical signals detected by said sensor is incorporated in the flexible support (11) and forms, with said sensor, an active electrode. The portable device also comprises a housing (12) comprising an electronic system for processing signals from said electronic filtering and amplification circuits, said housing being linked mechanically to the flexible support to form, with said support, a means of attachment to a garment or accessory intended to be worn by the user.

The application discloses a kind of based on laminated CrOCl auxiliary storage's floating gate structure optoelectronic synapse device and preparation method, belong to semiconductor device technical field.Device includes by lower to upper sequentially arranged substrate, Gr nanosheet, CrOCl nanosheet, h-BN nanosheet and MoS2 Nanosheet, wherein, MoS2 Nanosheet two ends are connected with active electrode and drain electrode, Gr nanosheet, CrOCl nanosheet, h-BN nanosheet and MoS2 Nanosheet are combined by Van der Waals interaction;MoS2 / h-BN / CrOCl / Gr floating gate optoelectronic synapse device of the application can effectively increase double scanning storage window by the secondary adsorption electron capacity of CrOCl, widen multi-level storage capacity, can realize multi-level storage under the joint modulation of electric pulse and light pulse, show excellent electrical writing and optical erasing technology in photoelectric hybrid storage, in addition, under the common modulation of photoelectricity, show good synapse characteristics, including long-term plasticity, short-term plasticity, the recognition accuracy of neural network constructed by MoS2 / h-BN / CrOCl / Gr floating gate device of the application can reach 97% on direction identification data set.

The application discloses a preparation method of a flexible active myoelectric electrode array structure and relates to the field of flexible electronics and active electrode preparation; the structure comprises: a plurality of active electrodes; the plurality of active electrodes are arranged in a horizontal-longitudinal matrix mode; each active electrode comprises: a flexible substrate and an active flexible amplification electrode arranged on the flexible substrate; the active flexible amplification electrode comprises an electrode and a common-source amplification circuit; the electrode and the common-source amplification circuit are in one-to-one correspondence; the electrode and the common-source amplification circuit are connected; the structure realizes synchronous collection of surface myoelectric signals by multiple channels, the flexible substrate enhances the wearability of the electrode, the differential structure, that is, the common-source amplification circuit can improve the interference of common-mode signals, reduce the introduction of noise, improve the signal-to-noise ratio of myoelectric signals, and reduce signal crosstalk between different channels.

A bipolar radiofrequency (RF) device for treating tissue in the presence of an electrically conductive fluid includes a headpiece and a probe. The handpiece has a motor drive, a receiving channel, and an active electrical contact on an inner wall of the receiving channel. A return electrical contact is disposed proximally of the active electrical contact on the inner wall of the receiving channel. A probe includes a proximal hub and an elongated shaft extending distally about a longitudinal axis from the proximal hub, and the hub being may be inserted into and removed from the receiving channel of the handpiece. A working end of the probe is located at a distal end of the elongated shaft, and the working end includes an active electrode and a return electrode. A return electrical contact is located proximally of an active electrical contact on an outer surface of the hub. In this way, the return electrical contacts in the receiving channel and on the outer surface of the hub, respectively, and the achieve electrical contacts in the receiving channel and on the outer surface of the hub, respectively, engage each other when the hub is inserted into the receiving channel of the handpiece.

The application discloses a water-soluble polymer-based proton-type memristor and a preparation method thereof. The memristor has a sandwich structure and is sequentially composed of a top electrode, an inorganic resistive switching functional layer, an organic resistive switching functional layer and a bottom electrode. The top electrode is a metal active electrode, the bottom electrode is indium tin oxide (ITO), the inorganic resistive switching functional layer is a metal oxide film, and the organic resistive switching functional layer is a doping system composed of a water-soluble polymer and a doping material. The preparation process of the proton-type memristor is reliable and stable. The obtained memristor has the characteristics of high biocompatibility and green environmental protection. The device performance consistency and environmental dependence are improved, and the simulation of bionic synaptic plasticity is greatly improved. The device can be controlled by using a low voltage, has low power consumption, and has a good bidirectional current modulation effect, so that the device provides a possibility for further enriching synaptic functions and designing flexible wearable devices.

A combination arthroscopic tissue resection probe includes an elongated shaft having an outer conductive sleeve and an inner sleeve. Each sleeve includes a distal region with a cutting window, the inner sleeve being rotatable to cut tissue. An outer surface of the outer sleeve distal region carries a ceramic body (580) and an electrode (570). The active electrode (570) defines two portions angularly offset from one another, the two portions including a first portion (571) extending circumferentially and axially along the tubular distal end and a second portion (578) extending from a distal end of the first portion and across the tubular distal end, the second portion having at least one flange (595) configured to engage a notch (581) in the electrically insulating spacer (580) to resist separation of the active electrode from the electrically insulating spacer (580). The electrode, ceramic body, and outer sleeve each define a first suction (572, 586, 512) opening to draw fluid ablation byproducts through the opening into an interior of the shaft. Various methods of improving electrode attachment are disclosed that provide a low profile probe distal end while maintaining electrosurgical functionality.

A system for testing different regions of the retina of a subject for retinal function, said system comprising: a monitor configured to display a visual electrophysiology stimulus to the subject, wherein the visual electrophysiology stimulus comprises a four ring visual electrophysiology stimulus; at least one active electrode; at least one reference electrode; and a computer configured to receive electrical signals from said at least one active electrode and said at least one reference electrode, and process the electrical signals.

A device and method for detecting faults in a shield of an electrosurgical instrument is described. The device has a relay configured to selectively interrupt power to the electrosurgical instrument, monitoring circuitry configured to monitor a shield in the electrosurgical instrument, control circuitry to control the relay, and a battery power source. The monitoring circuitry has an envelope detector and a detected average shield current detector. The monitoring circuitry is configured to compare a shield current peak value to a shield current peak threshold value, and to compare a detected average shield current value to a detected average shield current threshold value. The device is further configured to operatively couple an active electrode of an electrosurgical instrument and a return electrode to an electrosurgical generator.

An arthroscopic cutting probe includes an outer sleeve having a longitudinal bore and an outer cutting window at its distal end. An inner sleeve is rotationally disposed in a bore of the outer sleeve, and the inner sleeve has a distal end, a proximal end, a longitudinal passageway, and an inner cutting window at its distal. An active electrode sleeve is disposed on an outer surface of the inner sleeve in a position opposed to the inner cutting window. Rotation of the inner sleeve relative to the outer sleeve causes the inner cutting window to rotate past the outer cutting window to resect tissue received through the cutting windows as they pass each other. Radiofrequency current can be applied to the active electrode to enhance tissue cutting then the cutting windows are being rotated or to able or cauterize tissue when the cutting windows are held stationary with the active electrode disposed through the outer cutting window.

The application relates to a double-layer polymer film-based rechargeable moisture power generation device and a preparation method thereof, and belongs to the technical field of moisture power generation. The device comprises an active electrode, a double-layer polymer film and an inert porous electrode which are sequentially arranged, wherein the first layer polymer film of the double-layer polymer film is a mixture of iron hydroxide, polystyrene sulfonic acid and polyvinyl alcohol, the second layer polymer film is polydiallyldimethylammonium chloride, the first layer polymer film is in contact with the active electrode, and the second layer polymer film is in contact with the inert porous electrode; the material of the active electrode is a metal with a standard electrode potential of-1V to +0.5V, and the material of the inert porous electrode is a metal with a standard electrode potential greater than +1V. Through moisture evaporation and redox reaction, the battery can generate power spontaneously in a moisture environment, and can be self-repaired through the redox reaction when the performance decreases, so that the charging effect is realized.