25 results about "Magnetic transducers" patented technology

An apparatus for measuring movement of a test specimen, where the apparatus includes an electromagnetic transducer and an optical probe. The apparatus may include a test specimen holder and a body that move together. The optical probe may be configured to direct an optical beam through the body to the test specimen, which may provide for measurement of a prompt impulse. The electromagnetic transducer may be configured to produce a voltage when the test specimen holder and the body move, which may provide for measurement of a total impulse of the same test specimen. Thus, a single gauge may provide for measuring both prompt impulse and total impulse of the same test specimen.

A super-paramagnetic material transducer includes: a rigid body with a longitudinal central axis and two planar surfaces at each of the opposite ends of the body in the direction of the longitudinal central axis, both of these planar surfaces being substantially perpendicular to the longitudinal central axis; and at least one support channel formed in the body and in which a super-paramagnetic coil is housed, the support channel extending parallel to the longitudinal central axis and opening onto both planar surfaces. The super-paramagnetic coil is formed by a core made of super-paramagnetic around which at least one electrical conductor is wound. Furthermore, a feedback winding formed by an electric conductor is wound on the external surface of the body and along the longitudinal central axis.

The application discloses an underwater magnetic field coupling magnetostrictive backfill type friction spot welding device, which comprises a stirring needle, a compression ring, welding material, a compression ring chuck, a top end clamp, a top rod, a cap, an electromagnetic transducer, a magnetic conducting ring, a fixed connecting rod and a water tank; the top end clamp is fixed on the compression ring chuck and cooperates with the internal top rod to fix the welding material at the bottom end of the electric spindle; the fixed connecting rod is sequentially sleeved with the electromagnetic transducer and the cap, and the three are concentrically matched and located at the bottom of the welding point center; the magnetic field energy is converted into electric energy and mechanical energy to the welding point through the electromagnetic transducer. The stirring needle is opposite to the surface of the welding material; the welding material is submerged in the pool of the water tank, and the pool water flow in the water tank is adjusted according to the temperature change; the electronic converter is added at the bottom to improve the temperature distribution of the welding point and the material flow; the underwater welding reduces the heat input and the heat affected zone structure area, and ensures the effective implementation of electromagnetic induction.

A selective acoustic electromagnetic transducer (400) for a Lamb wave propagation mode of interest propagating in a structure, comprising a circularly shaped magnet (401) and a coil (402) comprising several independent concentric circular portions and a processing unit (403) connected to the ends of each circular portion, the processing unit (403) being configured to generate a composite signal equal to a linear combination of the signals measured on each circular portion, the coefficients of the linear combination being chosen so as to minimize the sensitivity of the coil (402) to a set of Lamb modes excluding the mode of interest. Figure 4a

A super-paramagnetic material transducer includes: a rigid body with a longitudinal central axis and two planar surfaces at each of the opposite ends of the body in the direction of the longitudinal central axis, both of these planar surfaces being substantially perpendicular to the longitudinal central axis; and at least one support channel formed in the body and in which a super-paramagnetic coil is housed, the support channel extending parallel to the longitudinal central axis and opening onto both planar surfaces. The super-paramagnetic coil is formed by a core made of super-paramagnetic around which at least one electrical conductor is wound. Furthermore, a feedback winding formed by an electric conductor is wound on the external surface of the body and along the longitudinal central axis.

An electromagnetic transducer (17) for symmetric oscillations of a symmetrically oscillatory device (1) is provided. The electromagnetic transducer (17) comprises a first electromagnetic transducer portion having a first electromagnetic transducer portion center of mass (CM17a) and a second electromagnetic transducer portion having a second electromagnetic transducer portion center of mass (CM17b). The first electromagnetic transducer portion and the second electromagnetic transducer portion are symmetrically balanced.

The invention relates to a superparamagnetic (SPM) transducer comprising: - a rigid body (10) having a longitudinal central axis (X) and two planar surfaces (101, 102) at each of the opposite ends of the body (10) in the direction of the longitudinal central axis (X), the two planar surfaces (101, 102) being substantially perpendicular to the longitudinal central axis (X); - at least one support channel (103) formed in the body (10) and accommodating a SPM coil (2), the support channel (103) extending parallel to the longitudinal central axis (X) and being open to the two planar surfaces (101, 102), the SPM coil (2) being formed by a core based on a SPM material around which at least one electrical conductor is wound. Furthermore, a feedback winding (3) is formed by an electrical conductor along the longitudinal central axis (X) and wound on an outer surface of the body (10).

Electromagnetic transducer, intended for measuring two-dimensional velocities of an electrically conductive fluid flow. The invention relates to an electromagnetic transducer (10), intended for measuring the two-dimensional velocity components of an electrically conductive fluid flow, comprising: - a cylindrical metallic tube (11) forming a core with high magnetic permeability, which extends along a central axis (Z), comprising a central portion and two end portions, on either side of the central portion, each comprising two bosses (13.1 to 13.4), diametrically opposed to each other with respect to the central axis (Z) and each delimiting a flat surface, parallel to the central axis (Z), - an electrical coil (12), called the primary coil, wound around the central portion of the tube, - four electrical coils (14.1 to 14.6), called receiving coils, each wound around one of the flat surfaces, or four hall effect sensors, each arranged on one of the flat surfaces. Figure for the abbreviation: fig.13.

Electromagnetic transducer, intended for measuring three-dimensional velocities of an electrically conductive fluid flow. The invention relates to an electromagnetic transducer (10), intended for measuring the three-dimensional velocity components of an electrically conductive fluid flow, comprising: - a cylindrical metallic tube (11) forming a core with high magnetic permeability, which extends along a central axis (Z), comprising a central portion and two end portions, on either side of the central portion, each comprising three bosses (13.1 to 13.6), arranged at 120° to each other around the central axis (Z) and each delimiting a flat surface, parallel to the central axis (Z), - an electrical coil (12), called the primary coil, wound around the central portion of the tube, - six electrical coils (14.1 to 14.6), called receiving coils, each wound around one of the flat surfaces, or six hall effect sensors, each arranged on one of the flat surfaces. Figure for the abbreviation: fig.13.

The invention discloses a method for simultaneously measuring viscosity and density of trace liquid. Liquid circulates in the thin-wall cylinder resonator, the electromagnetic transducer is attached to the thin-wall cylinder resonator, the thin-wall cylinder resonator is excited through a coil to generate ultrasonic guided waves, an attenuation signal is received, a dimensionless time domain attenuation coefficient and resonance frequency of the attenuation signal are extracted, and the resonance frequency of the thin-wall cylinder resonator is calculated. And in combination with the established model of the relationship between the liquid viscosity and density parameters and the time domain attenuation and the resonant frequency, synchronous and simultaneous decoupling of the liquid viscosity and density parameters is realized. The method overcomes the limitation that the viscosity and the density are difficult to measure synchronously, the operation is complicated, the environmental requirement is high, and the guided wave resonance sensor is difficult to distinguish the two parameters, and is rapid, convenient and suitable for online monitoring measurement.

An ultrasonic sensor includes a magnetic substance, a diaphragm, and an electromagnetic transducer. The electromagnetic transducer is disposed opposing the magnetic substance across an outer plate of a vehicle. The diaphragm has the shape of a thin film with a film thickness direction along an axial direction parallel to a directional axis. The diaphragm is able to ultrasonically oscillate by being joined to an outer surface of the outer plate at an outer edge in a radial direction crossing the directional axis. With the outer edge of the diaphragm joined to the outer surface of the outer plate, an internal space that expands and contracts along the axial direction in response to ultrasonic oscillation of the diaphragm is formed between the diaphragm and the outer surface of the outer plate.

Medical apparatus includes a probe including a distal part adapted for insertion into a body of a living subject and first and second magnetic transducers in the distal part of the probe. Control circuitry drives the first magnetic transducer to generate a first AC magnetic field at a first frequency and drives a magnetic field generator in proximity to the body to generate a second AC magnetic field within the body at a second frequency, calculates a disposition of the distal part of the probe by processing a first signal output by the second magnetic transducer at the first frequency, and calculates position coordinates of the distal part of the probe by processing a component of a second signal output by one of the first and second magnetic transducers at the second frequency while canceling from the second signal interference at the first frequency.

An electromagnetic transducer, including a plurality of static flux paths, and a plurality of dynamic flux paths, wherein at least two of the plurality of static flux paths lie in respective first planes parallel and offset from one another, at least two of the plurality of dynamic flux paths lie in respective second planes parallel and offset from one another, and the first planes and the second planes are arrayed so as to establish at least a general tic-tac-toe lattice.

A device, comprising a coupling apparatus configured to couple to a male mating coupling component and also configured to couple to a female mating coupling component. In some embodiments, the coupling apparatus is configured to snap couple to a male mating coupling component and also configured to snap couple to a female mating coupling component.

A coil (402) with a meandering spiral for a selective acoustic electromagnetic transducer for a Lamb wave propagation mode of interest propagating in a structure, the coil comprising several concentric circular portions (C1, C2, C3) connected by meander-shaped portions (M1, M2), each circular portion (C1, C2, C3) consisting of a winding of several turns, the number of turns and the current direction of each circular portion being dimensioned by minimizing the sensitivity of the coil (402) to a set of Lamb modes excluding the mode of interest. Figure 4b

The utility model provides a magnetic type transducer fixing device, which belongs to the technical field of medical instruments and comprises a transducer with a buckle ring. The magnetic clamping groove and the magnetic fixing belt are integrally formed, and the lower end of the magnetic clamping groove is of a closed structure; a back adhesive structure is arranged on the outer layer of the magnetic base; the energy converter with the buckle ring can be inserted into the magnetic attraction clamping groove and is fixed to the metal surface through the magnetic attraction effect of the magnetic attraction fixing belt, or the energy converter is indirectly fixed to the non-metal surface through fixing the magnetic attraction base through the gum structure. According to the utility model, the transducer clamped on the magnetic attraction fixing band is directly adsorbed on the surface of a metal object through the magnetic attraction fixing band, so that a fixing effect is achieved; when the transducer is fixed at the non-metal part of the bed body, the magnetic attraction base is fixed at the non-metal part of the bed body through gum on the outer side of the magnetic attraction base, and the transducer is fixed at the required position through the magnetic attraction effect between the magnetic attraction base and the magnetic attraction fixing belt.

A speaker includes a magnetic assembly having a top air gap and a bottom air gap spaced apart from each other along an axis. The speaker also includes a voice coil assembly having a bobbin having a top voice coil and a bottom voice coil. The spool is movable relative to the magnetic assembly in an upward direction and a downward direction along the axis, wherein at least one of the voice coils is respectively at least partially positioned within at least one of the air gaps. The voice coils are spaced apart from each other along an axis with an outward offset such that, in an average axial position of the spool, a portion of the top voice coil extending upward above the top air gap is larger than a portion of the top voice coil extending downward below the top air gap, and the part of the bottom voice coil extending downwards to the lower part of the bottom air gap is larger than the part extending upwards to the upper part of the bottom air gap.

The invention relates to devices for generating mechanical energy by converting magnetic field energy and can be used as an environmentally friendly energy source for motors used in energy technology, transportation, and other industrial sectors. The device comprises at least one energy module in the form of a magnetic system consisting of at least one stator and one rotor arranged coaxially to each other, the rotor being designed as rollers that rotate about their axis and are arranged concentrically to the outer circle of the stator, and the stator being rotatable in the preset direction, a power pickup system, and a starting system that puts the device into self-supporting rotation mode, the rotor rollers being arranged at a predetermined distance from each other on the outer surface of the stator without engaging with the stator.namely by means of transverse magnetic inserts, wherein the rollers are limited in their vertical movement due to the interaction of the magnetic forces of the rotor and stator and are mounted to roll on the outer surface of the stator without limitation by the separator, and the power take-off system and the starting system are designed in the form of an electromagnetic control system comprising a control unit, sensors for monitoring the roller movement and electromagnetic transducers arranged around the rotor on the circumference of the device and ensuring starting, stabilization of the system or power take-off, as well as an electric motor / generator mechanically connected to the stator and arranged on an axis with it,The device further comprises more than one coaxially arranged energy module, and the energy module comprises more than one stator and more than one concentrically arranged rotor. The proposed technical solution enables the creation of such a device for generating mechanical energy, in which an improvement in the efficiency of converting magnetic field energy into mechanical energy is achieved, stable operation of the device in self-supporting rotation mode is ensured, maintenance costs are reduced, and the manufacturability of the device is increased through improvements and simplification of the design.

A medical-device visualization system includes an elongate medical device having passive electromagnetoresponsive ("EMR") elements distributed along a length thereof, a magnetic interrogator having magnetic transducers for transducing responses of the EMR elements to an external magnetic field, and a console for visualizing a shape of the medical device as it is advanced through a vasculature of a patient within the external magnetic field. A registration process of the console registers the EMR elements including a distalmost EMR element of the medical device at various magnetic transducers. A shape-sensing process senses the shape of the medical device from time-dependent location data for the EMR elements from the magnetic interrogator. A reference-framing process places the shape of the medical device in a patient-based reference frame following conversion of the location data from a magnetic interrogator-based coordinate system to a patient-based coordinate system in the patient-based reference frame.

The invention discloses an underwater contactless electrical connection device. The electrical connection device comprises an active assembly and a passive assembly, the active assembly comprises a first pressure-resistant shell, a first needle seat and an electromagnetic transducer, the electromagnetic transducer is arranged in the first pressure-resistant shell, and the first needle seat is inserted into the first pressure-resistant shell and electrically connected with the electromagnetic transducer; the passive assembly comprises a second pressure-resistant shell, a second needle seat and a magnetoelectric transducer, the magnetoelectric transducer is arranged in the second pressure-resistant shell, and the second needle seat is inserted into the second pressure-resistant shell and electrically connected with the magnetoelectric transducer; the active component and the passive component are oppositely arranged, and the magnetic signal transmitting direction of the electromagnetic transducer is opposite to the magnetic signal receiving direction of the magnetoelectric transducer, so that the electromagnetic transducer and the magnetoelectric transducer are electrified in a contactless manner. According to the technical scheme, the problems that hot plugging cannot be carried out underwater, the operation difficulty is large, short circuit is likely to happen, and corrosion is likely to happen can be effectively solved, safety is improved, maintenance cost is reduced, and the service life is prolonged.

Speed ​​variation detector for an electrically conductive fluid flow, comprising an electromagnetic transducer. The invention relates to a speed variation detector for an electrically conductive fluid flow, comprising: - an electromagnetic transducer (10), comprising: a metallic cylindrical tube (2) forming a core with high magnetic permeability, an electrical coil (3), called the primary coil, wound around the tube and intended to be electrically powered by direct current, or a permanent magnet arranged around the tube, at least one electrical coil (4), called the receiving coil, wound around the tube while being adjacent to the primary coil or the permanent magnet, - at least one envelope detector circuit (7) connected to the receiving coil, comprising at least one diode (8; 8.1, 8.2) and a load (9; 9.1, 9.2) in electrical series with the diode, the load being made up of a capacitor (90; 90.1, 90.2), and an electrical resistance (91; 91.1, 91.2). Figure for the abbreviation: fig.11.

An electromagnetic transducer (17) for symmetric oscillations of a symmetrically oscillatory device (1) is provided. The electromagnetic transducer (17) comprises a first electromagnetic transducer portion having a first electromagnetic transducer portion center of mass (CM17a) and a second electromagnetic transducer portion having a second electromagnetic transducer portion center of mass (CM17b). The first electromagnetic transducer portion and the second electromagnetic transducer portion are symmetrically balanced.

A magnetic assembly for a loudspeaker includes a first pole shoe having a first pole tip and a second pole shoe having a second pole tip. The pole shoes are spaced apart with pole tips opposed across the air gap. And each pole tip expands outwards towards the air gap. The magnetic assembly may also include a first permanent magnet in contact with the first pole piece and a second permanent magnet in contact with the second pole piece. The magnetic assembly may be part of an electromagnetic transducer that also has a voice coil positioned at least partially within the air gap.

A magnetic assembly for a speaker includes a first pole piece having a first pole tip and a second pole piece having a second pole tip. The pole pieces are spaced apart with the pole tips being opposed across an air gap. Each pole tip is flared toward the air gap. The magnetic assembly may further include a first permanent magnet in contact with the first pole piece and a second permanent magnet in contact with the second pole piece. The magnetic assembly may be a part of an electromagnet transducer further having a voice coil positioned at least partially within the air gap.

A speaker includes a magnetic assembly having top and bottom air gaps that are spaced apart from one another along an axis. The speaker further includes a voice coil assembly having a bobbin with top and bottom voice coils. The bobbin is movable in upwards and downwards directions along the axis relative to the magnetic assembly with at least one of the voice coils being at least partially positioned respectively within at least one of the air gaps. The voice coils are spaced apart from one another along the axis with an outward offset such that in a mean axial position of the bobbin a larger portion of the top voice coil extends upwards above the top air gap than downwards below the top air gap and a larger portion of the bottom voice coil extends downwards below the bottom air gap than upwards above the bottom air gap.