45 results about "Magnetic transducers" patented technology

Devices, systems, and methods are provided for in vivo fluorescence imaging. Disclosed herein is an implantable miniature fluorescence imager on a chip having a custom imaging array with angle selective gratings, fiber optics, or microcollimators for image deblurring, and optical filters that can be tuned to image fluorescence from multiple fluorophores simultaneously. Power is supplied by an on-chip power source or transmitted to the chip from an external transducer such as an ultrasound transducer, electromagnetic transducer, inductive transducer, or radiofrequency transducer. Wireless communication may be provided by electromagnetic or ultrasound links to the device. The function of a fluorescence microscope is provided in a millimeter-scale device that can be readily implanted in tissue and used to image fluorescently labeled cells in vivo. The small size of the fluorescence imager makes possible sustained in vivo imaging with real-time monitoring of multiple cell types within Shifting the dynamic diseased tissue or a tumor.

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 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 housing an SPM coil (2), the support channel (103) extending parallel to the longitudinal central axis (X) and opening to the two planar surfaces (101, 102), the SPM coil (2) being formed by a core based on an SPM material, around which at least one electrical conductor is wound. Further, the feedback winding (3) is formed of an electrical conductor along the longitudinal central axis (X) and wound on the outer surface of the body (10).

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).

A semiconductor device includes a semiconductor substrate, the semiconductor substrate including: an excitation circuit for applying an excitation signal; the soft magnetic assembly is used for guiding the magnetic flux lines; the soft magnetic component is electrically connected to the excitation by means of at least two electrical contacts in the form of a back contact or a side contact; the substrate further comprises at least one electromagnetic transducer, the at least one electromagnetic transducer being operably connected to the soft magnetic assembly; the excitation circuit comprises a modulator used for providing a modulated signal to the soft magnetic assembly to modulate the magnetic conductivity of the soft magnetic assembly; the substrate further includes a demodulator configured to demodulate a signal obtained from the at least one electromagnetic transducer.

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.

An apparatus includes a bobbin, at least one counterweight assembly, and at least one spring. The bobbin includes at least one core and at least one electrically conductive coil wound around at least a portion of the bobbin. The at least one counterweight assembly is configured to move in response to magnetic fields generated by the bobbin. The at least one spring is in mechanical communication with the at least one counterweight assembly. The at least one spring is configured to resiliently deform in response to movement of the at least one counterweight assembly. The at least one spring includes at least one piezoelectric element.

The present invention provides a planar earphone with a ring magnet, comprising an electromagnetic transducer; the electromagnetic transducer includes: a mounting member, a ring magnet, a diaphragm and a coil; wherein, an acoustic opening is provided at the geometric center of the ring magnet; the diaphragm is mounted on the mounting member and includes a radiation surface facing the acoustic opening; the coil is located on the diaphragm and within the magnetic field of the ring magnet; the diaphragm at least has a central region without a coil arrangement and axially aligned with the acoustic opening, and when the electromagnetic transducer is driven by an audio signal, the central region generates sound that propagates into the surrounding environment through the acoustic opening; the surface of the ring magnet close to the diaphragm and the inner side surface close to the central axis are connected by a transition surface that is arc-shaped in the radial cross-section of the ring magnet; it can improve the sensitivity and reduce the distortion rate.

Electromagnetic transducer for measuring two-dimensional speeds of an electrically conductive fluid flow. The invention relates to an electromagnetic transducer (10) for measuring the two-dimensional speed components of an electrically conductive fluid flow, comprising: - a metallic cylindrical 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 a number of 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 electric coil (12), called the primary coil, wound around the central portion of the tube, - a number of four electric 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 abstract: 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.

Marine vibrators and marine vibrator systems having one or more remotely positioned components are provided herein. An exemplary marine vibrator includes at least one electromagnetic transducer, control-monitoring electronics, and a frame, wherein the at least one electromagnetic transducer is located at least partially within the frame. The at least one electromagnetic transducer receives alternating current (AC) power from one or more power amplifiers via at least one umbilical connecting the at least one electromagnetic transducer and the one or more power amplifiers, wherein the one or more power amplifiers are positioned remote from the marine vibrator.

The invention discloses a cylindrical electromagnetic transducer. The cylindrical electromagnetic transducer comprises an outer shell and a vibrating tube fixed in the outer shell, the vibration tube comprises a cylindrical shell and a fixing rod penetrating through the cylindrical shell in the axial direction of the cylindrical shell, the two ends of the fixing rod are fixed to the inner wall of the outer shell, and the fixing rod is located in the cylindrical shell, wound with an electrified coil and coaxially provided with a magnetic field concentration mechanism. The magnetic field concentration structure comprises a plurality of supporting rods parallel to the fixing rod and a magnetic field concentrator, the supporting rods are arranged around the fixing rod to form an annular supporting frame, and the magnetic field concentrator is connected to the annular supporting frame in a sleeving mode. Compared with a traditional flat plate type electromagnetic transducer which has the problems of insufficient anti-pressure ability, incompact structure, low working efficiency and the like under the deep sea high pressure condition, the device provided by the invention has the advantages that the anti-pressure ability is higher, and the device is suitable for the detection environment under the deep sea high pressure.

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.

A system for generating a three dimension (3D) imaging of an object, the system comprising: an electromagnetic transducer array such as an RF (radio-frequency) antenna array surrounding the object said array comprising: a plurality of electromagnetic transducers; a transmitter unit for applying RF signals to said electromagnetic transducer array; and a receiver unit for receiving a plurality of RF signals affected by said object from said electromagnetic transducers array; a Radio Frequency Signals Measurement Unit (RFSMU) configured to receive and measure said plurality of plurality of affected RF signals and provide RF data of the object; and at least one processing unit, configured to process said RF data to identify the dielectric properties of said object and construct a 3D image of said object.

The invention relates to a detector comprising an electromagnetic transducer for detecting changes in velocity of a flow of an electrically conductive fluid, in particular comprising:-an electromagnetic transducer (10) comprising: a cylindrical metal tube (2) forming a core having a high magnetic permeability; an electric coil (3), referred to as a primary coil, wound around the tube and intended to be powered by a direct current, or a permanent magnet arranged around the tube; at least one electrical coil (4), referred to as a receiver coil, wound around the tube while being adjacent to the primary coil or the permanent magnet,-at least one envelope detection circuit (7) connected to the receiver coil and comprising at least one diode (8; 8.1, 8.2) and at least one load (9; 8.1, 8.2) electrically connected in series with the diode; 9.1, 9.2), said load being supplied by a capacitor (91; 91.1, 91.2) and a resistor (90; 90.1, 90.2), and a method for manufacturing the same.

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.

The present disclosure relates to methods and devices for applying electromagnetic field jerk to materials and tissues.A first method comprises the following steps: A) generating an activation signal having a waveform that generates electromagnetic field jerk; and B) applying the activation signal to the arrangement of electromagnetic transducers.A second method comprises the following steps: a) generating a carrier signal with a series of pulses by a computing unit; b) generating a modulating signal that generates jerk; c) generating an activation signal that modulates the carrier signal using the modulating signal that generates jerk; d) applying the activation signal to the arrangement of electromagnetic transducers.Some embodiments of the disclosed methods and devices are used for fracturing, pulverizing and reducing particle size of material and tissues.

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.

The invention relates to an electromagnetic transducer (10) for measuring a two-dimensional velocity component of an electrically conductive fluid flow, comprising:-a cylindrical metal tube (11) forming a core with a high magnetic permeability, said tube extending along a central axis (Z) and comprising a central portion and two end portions on both sides of said central portion, each end portion comprising two bosses (13.1 to 13.4), the two bosses are radially opposite to each other with respect to the central axis (Z), and each boss defines a flat surface parallel to the central axis (Z); -an electric coil (12), referred to as a primary coil, wound around a central portion of the tube; -four electrical coils (14.1 to 14.4), referred to as receiver coils, each receiver coil being wound around one of said flat surfaces; or four Hall effect sensors, each Hall effect sensor being arranged on one of the flat surfaces.

The present invention provides a planar headphone with an air guiding structure, comprising an electromagnetic transducer; the electromagnetic transducer includes: a mounting member, an annular magnet, a diaphragm and a coil; wherein, an acoustic opening is provided at the geometric center of the annular magnet; the diaphragm is mounted on the mounting member and includes a radiation surface facing the acoustic opening; the coil is located on the diaphragm and within the magnetic field of the annular magnet; the diaphragm at least has a central region without a coil arrangement and axially aligned with the acoustic opening, and when the electromagnetic transducer is driven by an audio signal, the central region generates sound that propagates into the surrounding environment through the acoustic opening; the surface of the annular magnet close to the diaphragm and the inner side surface close to the central axis are connected by a transition surface, and at least the transition surface is provided with a plurality of air guiding structures protruding from the annular magnet towards the diaphragm; it can improve the sensitivity and reduce the distortion rate.

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.