138 results about "Magnetic modulation" patented technology

The present invention relates to modulated (e.g., magnetically modulated) chemical sensors. In particular, the present invention relates to particles comprising fluorescent indicator dyes and methods of using such particles. Magnetic fields and / or Brownian motion modulate an optical property of the particle to distinguish it from background signals. The present invention thus provides improved methods of detecting a wide variety of analytes in fluids, fluid samples, cells and tissues.

A biosensor utilizing bio-functionalized magnetic nanoparticles is provided. An external magnetic field is applied to a suspension of magnetic nanoparticles. A linearly polarized incident light is applied to the suspension of magnetic nanoparticles. A photocurrent from polarized light scattering by bio-functionalized magnetic nanoparticles in liquid is detected. The magneto-optic sensing technique is applied to a micro-fluidic channel for rapid and sensitive detection with a small sample amount, and subsequent magnetic separation for detoxification. This technique is used for the detection of Brownian relaxation with time sweep as well as frequency sweep. The magneto-optical sensor enables rapidly detecting changes in local dynamic properties of the magnetic nanoparticles in liquids and magnetic modulation of ferromagnetic particles in liquid provides increased signal sensitivity.

The invention discloses a magnetic flux controllable memory motor online magnetic modulation performance prediction and optimization design method based on a nonlinear equivalent variable magnetic network model. The method includes: (1) setting material characteristics of each part of the motor; (2) establishing a nonlinear equivalent variable magnetic network model; (3) carrying out simulation calculation on the adjustable magnetic material; (4) optimizing motor structure parameters by combining a multi-objective genetic algorithm based on NSGA II with a nonlinear variable magnetic network; (5) changing the magnitude of excitation current, and obtaining an initial feasible non-dominated solution set; and (6) changing the magnitude of the excitation current, and reducing the range of the non-dominated solution set, so that the non-dominated solution set gradually approaches the optimal solution set suitable for multi-mode operation of the memory motor, wherein the target function of all parameter combinations in the preliminary feasible non-dominated solution set is solved again; And finally, obtaining an optimal parameter combination in the parameter set at the front edge of the optimal solution set, and determining the motor structure.

The present invention relates to modulated (e.g., magnetically modulated) chemical sensors. In particular, the present invention relates to particles comprising fluorescent indicator dyes and methods of using such particles. Magnetic fields and / or Brownian motion modulate an optical property of the particle to distinguish it from background signals. The present invention thus provides improved methods of detecting a wide variety of analytes in fluids, fluid samples, cells and tissues.

A magnetic modulation motor includes an armature, a magnetic induction rotor, and a magnet rotor. The armature is provided with a multi-phase winding with m pole pairs. The magnetic induction rotor includes k magnetic paths. In the magnet rotor, 2n permanent magnets forming a polarity region with n pole pairs are separately and annularly placed. The armature, the magnet rotor, and the magnetic induction rotor are arranged in the order from a radially outer side to a radially inner side. In the magnetic induction rotor, the magnetic path has two ends projecting toward a magnetic flux entry and exit located at an outer diameter face of the magnetic induction rotor, and forms a magnetic flux path between the magnetic flux entry and exit. The magnet rotor includes magnetic flux penetration region magnetically penetrated by magnetic flux between each circumferentially adjacent two permanent magnets.

A magnetic transmission apparatus is disclosed, wherein the magnetic transmission apparatus includes a still part (4), a first rotating shaft (81), a second rotating shaft (82), a first rotating part (1), a second rotating part (2), and a third rotating part (3); the first rotating part (1) is rigidly connected with the first rotating shaft (81); the second rotating part (2), the third rotating part (3) are fixed on the second rotating shaft (82); the first rotating part (1), the second rotating part (2), and the third rotating part (3) are successively distributed along an axial direction; the still part (4) includes a magnetic regulation seat (41) and a magnetic regulation ring (42); the second rotating part (2) is located inside the magnetic regulation ring (42); the first rotating part (1) includes a first iron core (11), a first permanent magnet (12), and a first support part (811); the second rotating part (2) includes a second iron core (21), and a second permanent magnet (22); the third rotating part (3) includes a third iron core (31), a third permanent magnet (32), and a second support part (821); the first iron core (11), the first permanent magnet (12), the magnetic regulation ring (42), the third permanent magnet (32) and the third iron core (31) are successively distributed along the axial direction. The first permanent magnet (12) and the third permanent magnet (32) are magnetized alternately and axially; the second permanent magnet (22) is magnetized alternately radially. The magnetic transmission apparatus has an axially and radially mixed magnetic circuit and can take full advantage of the magnetic modulation space and improve the torque density.