30 results about "Diamagnetic levitation" patented technology

The invention discloses a cross coupling rigidity excitation simulation device of a magnetic levitation centrifugal compressor. The device comprises a T-shaped groove table, and a high-speed motor, an elastic coupling, a radial magnetic levitation bearing module, a flexible magnetic levitation rotor, an excitation magnetic levitation bearing and a measuring module transversely arranged on the T-shaped groove table and connected in sequence; the measuring module comprises multiple radial eddy current displacement sensors; large and small dynamic balance discs are in interference assembly in the middle position of the flexible magnetic levitation rotor; the radial eddy current displacement sensors are connected with a signal input end of a digital controller; and an output end passes through a power amplifier to connect with a front radial magnetic levitation bearing, a back radial magnetic levitation bearing and the excitation magnetic levitation bearing. The device is simple in structure, convenient in use and operation and high in system stability, uses magnetic field force for exciting the flexible magnetic levitation rotor to form cross coupling rigidity interference, and can perform control studies of the cross coupling rigidity interference inhibition of the magnetic levitation centrifugal compressor on a testbed.

The invention discloses an air micro-flowmeter based on diamagnetic levitation mechanism. The air micro-flowmeter comprises a shell; a diamagnetic levitation part is arranged inside the shell; a cover plate is arranged at the upper end of the shell; a detecting device is arranged on the cover plate; the diamagnetic levitation part comprises a permanent magnet component and a high-directionality pyrolytic graphite rotor; the high-directionality pyrolytic graphite rotor is levitated over the permanent magnet component; the permanent magnet component is composed of neodymium iron boron or samarium cobalt permanent magnets; the detecting device comprises a sensor and a processing module; the sensor is arranged over the high-directionality pyrolytic graphite rotor and used for sending a signal to the processing module; the shell is cylindrical; an air charging hole and an air discharging hole are formed in the sidewall of the shell; the air charging hole and the high-directionality pyrolytic graphite rotor are arranged on the same horizontal plane. As the high-directionality pyrolytic graphite rotor is in a levitated state, the air micro-flowmeter disclosed by the invention is quite small in rotation resistance and can be used for detecting quite small air flow.

A diamagnetic levitation sphere having concentric superconducting coils encircling a hollow sphere. The inner surface of the sphere is lined with a 3D visual display screen. Users in carbon fiber suits are positioned within the hollow sphere by entering the sphere at its bottom end, standing on an elevator platform, and then being elevated up towards the center of the sphere. The superconducting coils are energized, the users are levitated while on the elevator platform, and then the elevator platform is lowered to the bottom of the sphere, closing the sphere. The users then float freely in space and can participate in a full emersion space ride game. The diamagnetic levitation sphere can also provide users unique experiences in physical training, therapy, entertainment, and education.

An apparatus for demonstrating, investigating and observing Brownian motion and temperature of a medium, such as gas or liquid, uses a small particle which is diamagnetically suspended in the medium. The tiny magnetized particle having a known mass is levitated using a diamagnetic technique, and the displacement of the particle over time is observable, which can be used to determine a temperature of the medium. Optionally, a second particle is suspended in a vacuum but mechanically connected to the same apparatus as the first enclosure with the first particle, thereby allowing observation and measurement of non-Brownian movement of the structure, and allowing more precise observation of Brownian movement effects on the first suspended particle.

The invention belongs to the technical field of gravimeters, and discloses a high-precision magnetic suspension relative gravimeter, a control method and application, a magnetic-gravity potential well adopted by the control method of the high-precision magnetic suspension relative gravimeter is realized based on a permanent magnet combination mode, and an anti-magnetic suspension mechanical system is used as a gravity sensitive device, the anti-magnetic suspension is to realize the suspension of the mass body by utilizing the anti-magnetic interaction generated by the spinning magnetic moment in the anti-magnetic material. The gravimeter based on the anti-magnetic suspension system is different from an existing method in the physical principle and is a complete principle innovation. Most importantly, compared with the prior art, the method has the advantages of being capable of working at room temperature, small in size, high in precision and high in stability, other gravimeters cannot have the advantages at the same time at present, and therefore the method has clear advantages in gravity measurement scenes with high requirements for the indexes in the future. The anti-magnetic suspension is completely passive suspension, has very high parameter stability in principle, and realizes low drift.

A diamagnetic levitation system for levitating users to a levitation surface upon which they may engage in sports and other activities under relatively weightless conditions in a dome-shaped structure. Superconducting magnet segments are connected in series to form a superconducting magnet segment assembly. A plurality of these superconducting magnet segment assemblies form the diamagnetic levitation system. The diamagnetic levitation system not only generates the levitation surface to which players or other users are levitated but also confines them within the boundaries of the levitation surface. The magnetic field strength of the diamagnetic levitation system is self-terminating so that spectators viewing the players are not affected by the levitating magnetic field.

The invention discloses a dynamic anti-magnetic levitation multi-dimensional density measuring device and method. The device comprises a linear magnetic field generation device, a rotating platform, an image acquisition module and a control detection module; the linear magnetic field generation device and the image acquisition module are oppositely arranged on a rotating plane of the rotating platform; the control detection module is connected with the rotating platform and outputs a motion control instruction; the image acquisition module acquires image acquisition data of a detection sampleand outputs the image acquisition data to the control detection module; suspension poses of the detection sample in different steady states are obtained by adjusting the rotating speed of the rotatingplatform; spatial position information of the detection sample is obtained according to the image acquisition data; discretization processing is conducted on the interior of the detection sample, anda multi-point and multi-dimensional density detection result of the detection sample is obtained. According to the invention, multi-point and multi-dimensional density measurement of the detection sample can be realized, so that the processing technology of the detection sample is comprehensively evaluated.

The invention discloses a gravity meter based on a nonlinear superconductive magnetic spring. The gravity meter comprises a superconductive magnetic spring oscillator and a displacement detecting unit. The superconductive magnetic spring oscillator comprises current-carrying coils and a testing mass body. The current-carrying coils and the testing mass body are each made of a superconductive body.The testing mass body is a cylinder with a middle partition plate. The current-carrying coils are arranged at the corresponding positions of the two ends of the middle partition plate respectively. The magnetic repulsion force between the current-carrying coils and the testing mass body balances the gravity of the testing mass body, and magnetic levitation is conducted on the testing mass body. The resultant force of the magnetic force borne by the testing mass body and the gravity of the testing mass body has the properties of resilience, the vertical superconductive magnetic spring oscillator is formed by the current-carrying coils and the testing mass body, and the magnetic repulsion force between the current-carrying coils and the testing mass body is in nonlinear relation with the distance between the current-carrying coils and the testing mass body; the displacement detecting unit is used for detecting the displacement of the testing mass body so as to detect the time-varying gravity acceleration of the gravity meter in the environment. The gravity meter can still normally work under the condition of large-amplitude platform vertical vibration.

The invention provides an anti-magnetic-suspension-based flowed energy harvester comprising a housing and a cover plate. The cover plate is arranged at the upper part of the housing; and an anti-magnetic-suspension system and induction coils are arranged in the housing. The anti-magnetic-suspension system consists of a lifting permanent magnet, an upper pyrolytic graphite plate, a magnet rotor, and a lower pyrolytic graphite plate that are arranged successively from top to bottom; the lifting permanent magnet is arranged below the cover plate; the magnet rotor is suspended between the upper pyrolytic graphite plate and the lower pyrolytic graphite plate freely; the magnetization direction of the lifting permanent magnet identical with that of the magnet rotor; and the induction coils are fixed at the upper pyrolytic graphite plate and the lower pyrolytic graphite plate. An air inlet hole and an exhaust vent that are opposite to each other are formed in the side wall of the housing; andthe magnet rotor is arranged between the air inlet hole and the exhaust vent. According to the invention, with the anti-magnetic-suspension technology, the magnet rotor is suspended between the pyrolytic graphite plates; and air pushes the magnet rotor to make rotation through the air inlet hole. When the magnet rotor rotates, magnetic fluxes in the induction coils change to generate alternatingcurrents, so that the flowed energy is transformed into electric energy.

The invention provides a flow type defect detection method based on a diamagnetic levitation principle. The method comprises the steps that a detection sample is placed in a prepared paramagnetic solution, a magnetic field is applied to the detection sample to achieve a levitation posture, and the density and magnetic susceptibility of the paramagnetic solution are obtained through calculation; and the detection sample, the paramagnetic solution and the magnetic field are integrally rotated, information of stable suspension pose of the detection sample in a magnetic space structural assembly at different rotating speeds is acquired, internal density distribution of the detection sample is obtained through calculation with the stable suspension pose being a boundary condition and based on amechanical equilibrium equation of equivalent gravity, diamagnetic force and centrifugal force, and contrastive analysis is carried out to obtain defect positions in the detection sample along the symmetry axis direction. A steady detection interval is constructed through a local potential energy difference principle, a liquid flow system and an external space magnetic field are utilized, stablesuspension space pose information of the detection sample is obtained by adjusting kinetic parameters of a rotary detection platform, space position information of the detection sample is obtained based on image acquisition data, and internal defect distribution of a detection object is obtained through calculation.

The invention provides an anti-magnetic levitation gas flowmeter with an embedded photoelectric detection unit. The anti-magnetic levitation gas flowmeter includes a housing and a cover plate, the cover plate is arranged on the upper portion of the housing, an anti-magnetic levitation system and a photoelectric bijection-type sensing unit are arranged in the housing, and the anti-magnetic levitation system includes a lifting permanent magnet, an upper pyrolytic graphite plate, a magnet rotor and a lower pyrolytic graphite plate which are arranged from top to bottom in sequence; the magnet rotor is freely suspended between the upper pyrolytic graphite plate and the lower pyrolytic graphite plate; the photoelectric bijection-type sensing unit comprises a laser lamp, a photoresistor, a resistor and a data processor; a corresponding gas inlet hole and a corresponding venting hole are formed in the side wall, on which light is directly emitted from the laser lamp, of the shell of the photoresistor. The magnet rotor is suspended between the pyrolytic graphite plates by means of an anti-magnetic levitation technology, gas pushes the magnet rotor to rotate through the gas inlet hole, correspondingly light rays of the laser lamp are intermittently emitted to the photoresistor, the data processor detects voltage signals on the resistor, and therefore the flow rate of gas is determined.