15 results about "Zero resistance" patented technology

The embodiment of the invention provides a flywheel direct-driven cogeneration unit dynamic adjusting system and a control method thereof, in the embodiment of the invention, a magnetic suspension technology is adopted to eliminate friction of a traditional mechanical bearing, and quick starting and stopping of the rotating speed of a flywheel are realized; the high-temperature superconducting magnetic clutch achieves instantaneous mechanical coupling / decoupling of the flywheel and the circulating pump through the zero resistance characteristic, and the response time is short. The frequency modulation requirement of a new energy power grid can be matched, and meanwhile hard constraint of thermal load fluctuation on electric energy output is avoided. The mechanical direct-drive path directly utilizes the kinetic energy of the flywheel to drive the circulating pump, so that a multi-stage energy conversion link in a traditional mode is omitted; the electric adjusting path realizes bidirectional power exchange between the flywheel and a power grid through an energy interface device, and the loss of an inverter is reduced; and the high-temperature superconducting magnetic clutch realizes zero-energy-loss transmission in a coupling state. The magnetic suspension flywheel set adopts a non-contact suspension technology, so that mechanical wear is eliminated; the high-temperature superconducting magnetic clutch achieves non-contact transmission through magnetic coupling, and friction loss is avoided.

The invention discloses a magnetron sputtering-based method for coating a conductive film on the surface of a bone-imitating fire-extinguishing glass ball. The method comprises the following steps: S1, cleaning the glass ball; s2, activating the surfaces of the glass balls; s3, forming an anti-coating film barrier by utilizing a laser heat effect, then coating a film, and forming an observation window; and S4, plasma-assisted annealing. According to the method for coating the conductive film on the surface of the bone-imitating fire extinguishing glass ball based on magnetron sputtering, magnetron sputtering coating is conducted on the surface of the glass ball in a step-pulse composite power mode, and the problem of mutual exclusion of compactness, stress and binding force in traditional coating is solved through energy-time-space coordinated regulation and control; according to the invention, high-reliability, ultra-thin and defect-free nanoscale film coating can be obtained, the bonding strength between film layers is increased, the conductivity is effectively ensured, and the conductive triggering and zero resistance functions of the glass ball are realized.

The present application relates to a kind of near zero resistance temperature coefficient temperature-pressure flexible sensor and its preparation method.It belongs to the technical field of multifunctional sensor preparation.The present application provides a kind of sensor preparation method, which can simultaneously produce resistance and voltage signal response to external pressure and temperature stimulation, and has near zero resistance temperature coefficient (-0.000836% ℃ ‑1 ) effectively avoid the complex decoupling process of single resistance signal output and the problem of environmental temperature change affecting resistance signal accuracy.The preparation method of the sensor is as follows: NaCl particles are used as templates to prepare porous polydimethylsiloxane (PDMS) sponge, the surface of the sponge is modified by plasma modification technology, the modified sponge surface is combined with Ti3C2 MXene nanosheet through electrostatic attraction, then conductive Nafion resin is introduced to enhance the adhesion of Ti3C2 MXene nanosheet on the surface of the sponge, and finally metal electrodes are pasted on the upper and lower surfaces of the composite sponge through conductive adhesive to obtain a temperature-pressure flexible sensor with near zero resistance temperature coefficient.

The invention belongs to the field of carbon fiber composite materials, and discloses a lightweight superconductive carbon fiber composite cable and a preparation method thereof, the cable is composed of a carbon fiber bundle layer, a multifunctional composite coating, a superconductive functional layer, an insulating layer, a shielding layer and a protective layer in sequence; the multifunctional composite coating is prepared from 60 to 65 parts of a polyamide acid precursor, 8 to 12 parts of 4-aminopropyltrimethoxysilane, 1 to 2 parts of glutaraldehyde, 3 to 5 parts of graphene nanosheets and 15 to 20 parts of a YBaCuOx precursor; a YBaCuOx ceramic layer with oriented crystals and continuous micro-channel cooling is obtained on the surface of the composite coating in situ by the superconductive functional layer through a pre-sintering, calcining and annealing cycle process combining sol-gel deposition and supercritical COdrying; the prepared cable has the advantages of high critical current density, zero resistance loss, excellent thermal-mechanical stability and extremely low self weight, and is suitable for the fields of high-frequency and long-distance lossless power transmission and low-temperature magnetic resonance.

This invention discloses a chaotic high-bond-density cluster superconducting material with tens of thousands of bonds. Based on yttrium, aluminum, and hydrogen, it self-organizes into a chaotic high-bond-density cluster structure without an ordered lattice through a natural fitting mechanism, independent of regular crystal structures. The material exhibits a superconductivity probability ≥0.9 under ambient pressure and a liquid nitrogen temperature range of 77K, stably achieving zero resistance and the Meissner effect. Through dual-temperature superconducting magnetic levitation sorting, it can enrich and separate potential superconducting phases in the -50℃ temperature range, providing a pathway for exploring medium- and high-temperature superconductivity. The invention also discloses the material's composition, structural characteristics, preparation process, densification parameters, and nano-reconnection repair method. It features ambient pressure realization, stable process, scalable mass production, excellent mechanical properties, and repairability, making it widely applicable in superconducting power transmission, magnetic levitation, superconducting magnets, medical devices, and energy storage devices, overcoming the technical bottleneck of existing high-temperature superconductivity technologies that rely on extreme high pressures and are difficult to engineer.

This invention provides a method for preparing infinite-layer nickel-based high-temperature superconducting thin films using metal-organic chemical vapor deposition (MOCVD). The main concept involves dissolving a soluble metal cation precursor in a solvent at a stoichiometric ratio, forming a thin film precursor on a single-crystal perovskite oxide substrate via MOCVD; subsequently, annealing under a high-oxygen-pressure atmosphere yields a thermodynamically metastable perovskite intermediate; finally, reduction conditions are used to transform it into an infinite-layer nickel-based high-temperature superconducting thin film. The advantages of this method include low cost, suitability for large-scale, large-area preparation of superconducting thin films, flexible control of film composition, and high reproducibility. The superconducting thin film prepared using this method exhibits zero resistance below 40 K and at ambient pressure, promising to promote the large-scale application of nickel-based superconducting materials in superconducting wires and tapes and in electronics, including high-field magnet coils, high-frequency low-loss cables, superconducting computers, superconducting antennas, and superconducting microwave devices.

The present invention is a system that produces zero noise magnetic field, which consists of: a coil made of superconducting wire, a precision current source, a Normally Closed Reed (NC) Relay, a Normally Opened (NO) Reed Relay, a cooling mechanism to maintain the superconductor temperature below the critical temperature. The precision current source generates the necessary initial current to act as source for the superconducting coil. The NO reed relay connects the precision current source to the superconductive coil. When this current start to flow, the NC Relay is used to close a superconductive path of the superconductive coil on to itself. Once the system becomes stabilized, the NO reed relay is made open, cutting off the precision source while the Normally Closed relay is closed, thereby a steady value current keeps flowing inside the superconducting coil with zero resistance and zero magnetic noise.

The application provides a misoperation prevention device, a multimeter device and a measurement method of the multimeter device, and relates to the technical field of relay protection. The misoperation prevention device of the multimeter comprises a misoperation prevention circuit, and the misoperation prevention circuit comprises: a safety resistor, which is used to be connected in series between a multimeter body and a multimeter pen; and a first switch module, which is arranged in parallel with the safety resistor. When the first switch module is in a closed state, the misoperation prevention circuit is in a zero resistance state. When the first switch module is in an open state, the misoperation prevention circuit is in a high resistance state. Through the technical scheme, the problem that the secondary equipment outlet in a transformer substation is misoperated due to internal damage or incorrect selection of a measurement range during the use of the multimeter in the prior art is solved, and the practicability of the misoperation prevention device is improved.

The invention relates to a device (1) for the cryogenic attenuation of a microwave signal transmission line, the device comprising: - a superconducting track (3) for conducting microwave signals; - at least one entirely normally conductive ground plane (4, 5), with non-zero resistivity, comprising: - a resistive film (6, 7) that is electrically insulated and spaced away from the superconducting track such that the characteristic impedance of the transmission line is at a predetermined value; - an electrically conductive body (8, 9) that is thermally and electrically connected and arranged adjacent to the resistive film such that at least part of the resistive film is located between the superconducting track and the conductive body, the conductive body being thermally connected to a periphery of the device maintained at cryogenic temperature, the thickness of the conductive body being at least two orders of magnitude greater than that of the resistive film, the thermal resistance per unit area thereof being at least ten times lower than that of the resistive film.

This invention provides a method for preparing infinite-layer nickel-based superconducting thin films using metal-organic chemical vapor deposition (MOCVD). The main concept involves dissolving a soluble metal cation precursor in a solvent at a stoichiometric ratio, forming a thin film precursor on a single-crystal perovskite oxide substrate via MOCVD; subsequently, annealing under a high-oxygen-pressure atmosphere yields a thermodynamically metastable perovskite intermediate; finally, reduction conditions are used to transform it into an infinite-layer nickel-based superconducting thin film. The advantages of this method include low cost, suitability for large-scale, large-area preparation of superconducting thin films, flexible control of film composition, and high reproducibility. The superconducting thin films prepared using this method exhibit zero resistance below 20 K and at ambient pressure, promising to promote the large-scale application of nickel-based superconducting materials in superconducting wires and tapes and in electronics, including high-field magnet coils, high-frequency low-loss cables, superconducting computers, superconducting antennas, and superconducting microwave devices.

The invention discloses an iron-based superconducting heterojunction and a preparation method thereof, and belongs to the field of topological superconducting heterojunctions. The iron-based superconducting heterojunction is of a layered structure and comprises a titanium dioxide buffer layer, an iron-selenium-tellurium superconducting layer and an antimony telluride topological insulating layer which are sequentially grown on the surface of a strontium titanate substrate. The preparation method of the iron-based superconducting heterojunction comprises the following steps: (1) preparing a Sb2Te3 bulk material; (2) preprocessing and loading an STO substrate; (3) enabling the TiO2 buffer layer to grow on the surface of the STO substrate by using a PLD (Pulsed Laser Deposition) process; (4) growing an FST superconducting layer on the surface of the TiO2 buffer layer by using a PLD process; (5) enabling the Sb2Te3 topological insulating layer to grow on the surface of the TiO2 buffer layer by using a PLD (Pulsed Laser Deposition) process; and (6) post-annealing: carrying out post-annealing on the Sb2Te3 bulk material obtained in the step (1) and the precursor obtained in the step (5) to obtain the iron-based superconducting heterojunction. The iron-based superconducting heterojunction provided by the invention can achieve the effects of zero resistance and relatively high temperature.

The utility model discloses a control handle angle sensor, which comprises a shell, a cover plate and a plurality of leading-out sheets, the shell is detachably and fixedly connected with the cover plate, an electric brush seat and a conductive plastic resistor body are arranged in the shell, the conductive plastic resistor body is fixedly arranged at the bottom of the shell, and the leading-out sheets are arranged on the cover plate. The conductive plastic resistor body is provided with a resistance area and a zero resistance area, the electric brush seat is coaxial with the conductive plastic resistor body and is rotatably connected with the conductive plastic resistor body, the shell and the cover plate, the electric brush seat is fixedly provided with an electric brush, and the electric brush works in the resistance area and the zero resistance area. According to the utility model, the structure is simple, angle detection signals are more stable and reliable by adopting the conductive plastic resistor body and reasonable arrangement of the resistance area and the zero resistance area, and meanwhile, the conductive plastic resistor body has excellent wear resistance, temperature stability and corrosion resistance, and can keep stable performance in various severe environments; the service life of the sensor is effectively prolonged.

Various embodiments and methods of operation and configuring of power converters for providing a controlled amount of AC output current even as a particular load may at times approach zero resistance are disclosed. The power converters are configured to tolerate a near-short or full-short circuit load for a brief time, without disabling or tripping any safety-interrupts. The various embodiments are configured to achieve electrical requirements needed for specific chemical reforming processes, such as vaporization of an ionic fluid. The various embodiments unlocks electrolysis using AC power, thereby enabling AC electrolysis in common fluids.

A variety of AC current sources provide a controlled amount of AC output current even as a particular load may at times approach zero resistance. These AC current sources can be plugged into conventional power outlets, e.g. 60 Hz (USA) and 50 Hz (European). The AC current sources can tolerate a near-short or full-short circuit load for a brief time, without disabling itself or tripping any safety-interrupt. This is achieved by an architecture that achieves the peculiar electrical requirements needed for specific chemical reforming processes, such as vaporization of an ionic fluid. One purpose of the AC current sources is to reform a customized proton-rich ionic fluid.