27 results about "Electromechanical transducer" patented technology

The invention relates to the cross technical field of computer-aided engineering and audio equipment design, discloses a circuit design simulation-based disc player design optimization method and system, and aims to solve the problem that the existing disc player design depends on physical prototype trial-manufacture and subjective listening evaluation and lacks multi-physical domain co-simulation capability. The method comprises the following steps: constructing a unified multi-physical domain model comprising a mechanical transducer, an electromechanical transducer and an electronic circuit sub-model; bidirectional coupling co-simulation based on the time sequence is executed, and an output electric signal is generated; extracting objective audio performance indexes such as total harmonic distortion and signal-to-noise ratio; and carrying out multi-objective optimization on the key design parameters by utilizing a genetic algorithm, and outputting a Pareto optimal scheme. The system comprises a model construction module, a co-simulation module, a performance index extraction module and an optimization module. Through high-fidelity full-link simulation and automatic optimization, the design efficiency and the audio fidelity are remarkably improved, and the research and development cost is reduced.

A method for producing an electromechanical transducer, a precursor damper, and an electromechanical transducer are provided. The method includes providing a precursor electromechanical transducer and a precursor damper. The precursor electromechanical transducer includes a static component and a movable component. The precursor damper includes an outer portion, an inner portion, at least one first bridge portion, and at least one second bridge portion. The method further includes mounting the precursor damper in the precursor electromechanical transducer such that the first outer section is attached to the static component, the first inner section is attached to the movable component, the second outer section is attached to the static component, and the second inner section is attached to the movable component; the damper is then formed from the precursor damper by severing at least one severing feature that physically attaches the first and second portions of the precursor damper to each other such that the first and second portions of the damper are physically separated from each other by air.

A method for inducing a sensation of motion in a subject, comprising defining a vibrational stimulation pattern for a subject; generating a set of electrical signals corresponding to the vibrational stimulation pattern; and transducing the set of electrical signals into a vibrations corresponding to the set of electrical signals with a plurality of electromechanical transducers, wherein the vibrations are adapted to induce the sensation of motion in the subject.

The proposed group of inventions relates to the field of pumping equipment adapted for pumping a gas-containing liquid by acting on said liquid using a medium released from the gas-containing liquid itself. For extracting a gas-containing liquid, production tubing and at least one electromechanical transducer are installed in a borehole. Attached to each of the two opposing ends of the electromechanical transducer is at least one vibration concentrating waveguide which acts on the gas-containing liquid from two opposing ends of a core of the transducer. The position of the electromechanical transducer inside the borehole is fixed by means of a protruding member situated in a region of zero vibration amplitude on each of the vibration concentrating waveguides. The electromechanical transducer is installed inside the borehole above the bubble point pressure level of the gas-containing liquid, electrical energy is fed to a winding on the core, and gas dissolved in the gas-containing liquid is released, giving rise to a gas-liquid mixture which is raised to the surface by the lifting energy of the released gas and the pressure on the bottom of the hole. The technical result includes increasing the amount of gas released from a unit volume of a gas-containing liquid, with no significant increase in the mass characteristics of the equipment used, and ensuring that the electromechanical transducer is securely fastened and held inside the borehole in the presence of high-frequency vibrations. In addition, the proposed solution obviates the need for equipment for feeding auxiliary fluids into a borehole in order to extract a gas-containing liquid.

The invention relates to the technical field of acoustic electromechanical transducers, and particularly discloses a multi-scene perception adaptive noise reduction method and system, an earphone and a storage medium. According to the scheme, environmental noise is acquired in real time through the noise acquisition module, acoustic characteristics and wearing states of ear canals of a user are analyzed in combination with the individual feature sensing module, a current acoustic scene is judged by the scene recognition module, noise reduction parameters are dynamically adjusted based on the self-adaptive control module, and finally anti-noise is generated through the noise reduction signal synthesis module to offset the noise. According to the method, the personalized and scene-adaptive noise reduction effect can be realized, and the noise reduction depth consistency and the user comfort are improved.

The invention discloses an ultrasonic transducer (1) for transmitting and / or receiving an ultrasonic signal, comprising a housing (2) surrounding a cavity (3). At least one electromechanical transducer element (8) for the mutual conversion of the ultrasonic signal into an electrical signal is connected to the housing (2) such that it is located within the cavity (3), and a membrane (4) spanning the cavity (3) is connected to it. The at least one electromechanical transducer element (8) is coupled to the membrane (4). The ultrasonic transducer (1) is characterized in that a plunger element (9) is provided for transmitting the ultrasonic signal between the at least one electromechanical transducer element (8) and the membrane (4), and that the plunger element (9) is articulated to the membrane (4). Furthermore, an ultrasonic transducer arrangement consisting of at least two such ultrasonic transducers (1) is described.

The invention relates to a vehicle glazing unit adapted for vibroacoustic emission and / or reception, the glazing unit comprising an electromechanical transducer and a glazing assembly, the transducer being fixedly mounted on the glazing assembly, the transducer comprising a movable element, the glazing comprising a first cavity formed at least by a first wall, the movable element comprises an attachment part and a movable part, the attachment part is fixedly installed on the glass window assembly, the movable part forms a suspended free film, and the free film forms a first wall.

The invention relates to the field of pumping equipment adapted for pumping a gas-containing liquid by acting on said liquid using a medium released from the gas-containing liquid itself. An electromechanical transducer comprises a container, a winding, and a core made of a magnetostrictive or piezoceramic material. The core has a vibration concentrating waveguide disposed thereon, wherein a surface of the latter that serves to act on a gas-containing liquid is situated outside of the container. Disposed on the side surface of the vibration concentrating waveguide, in a region of zero vibration amplitude, is a protruding member which is connected to the container. On the surface of the container there is a fastening means for securing same, with clearance, to an outer housing in such a way that the outer surface of the container that is free of the fastening means is capable of interacting with the gas-containing liquid. Furthermore, the container fastening means forms passages for the gas-containing liquid. The technical result consists in reducing the transmission of vibrations from the electromechanical transducer to an external suspension means, while also cooling the device by means of the gas-containing liquid.

A method for use in producing an electromechanical transducer. The method includes: providing a precursor electromechanical transducer and a precursor damper. The precursor electromechanical transducer includes a static assembly and a movable assembly. The precursor damper includes: an outer portion which defines an outer periphery of the precursor damper, and which includes first and second outer portion segments; an inner portion which defines an inner periphery of the precursor damper, and which includes first and second inner portion segments; at least one first bridge portion which connects the first outer portion segment to the first inner portion segment; at least one second bridge portion which connects the second outer portion segment to the second inner portion segment. The first outer portion segment includes a first outer connection formation for forming an electrical connection between the first outer portion segment and an electrical signal source. The second outer portion segment includes a second outer connection formation for forming an electrical connection between the second outer portion segment and the electrical signal source. The first inner portion segment includes a first inner connection formation for forming an electrical connection between the first inner portion segment and the movable assembly. The second inner portion segment includes a second inner connection formation for forming an electrical connection between the second inner portion segment and the movable assembly. The first outer portion segment, first inner portion segment and first bridge portion provide a first part of the precursor damper. The second outer portion segment, second inner portion segment and second bridge portion provide a second part of the precursor damper. The first part and second part of the precursor damper are physically attached to each other by at least one severable feature. The method includes installing the precursor damper in the precursor electromechanical transducer so that the first outer portion segment is attached to the static assembly, the first inner portion segment is attached to the movable assembly, the second outer portion segment is attached to the static assembly, and the second inner portion segment is attached to the movable assembly; then forming a damper from the precursor damper by severing the at least one severable feature which physically attaches the first part and the second part of the precursor damper to each other so that the first part and the second part of the damper are physically separated from each other by air.

A method for determining the state of at least one sensor whose mechanical behaviour is nonlinear as a function of the amplitude of the pressure exerted against the sensor, the sensor and an electromechanical transducer being able to be coupled to a support, the method comprising the steps of: applying an electrical signal at a first amplitude to the terminals of the first electromechanical transducer, and determining a first set of values of a parameter characteristic of the electrical impedance of the first electromechanical transducer in response to the application of the electrical signal; applying the electrical signal at a second amplitude to the terminals of the first electromechanical transducer, and determining a second set of values of the parameter characteristic of the impedance; measuring a deviation between the first set of values and the second set of values; determining a state of the sensor as a function of the deviation between the first set of values and the second set of values.

There is provided an electromechanical transducer, including: a chassis; a drive unit which includes a stationary part, which forms part of the chassis, and a moveable part which is moveable relative to the stationary part, wherein the drive unit is operable to cause the moveable part to move relative to the stationary part along a movement axis in a forward direction and in a rearward direction; a first suspension element and a second suspension element which are respectively configured to deflect along the movement axis, wherein the first suspension element is secured to a first landing surface of the chassis and the second suspension element is secured to a second landing surface of the chassis, and wherein the first suspension element includes a first suspension attachment formation attached to the moveable part and the second suspension element includes a second suspension attachment formation attached to the moveable part; wherein the first suspension attachment formation and the second suspension attachment formation are attached to at least one attachment formation of the moveable part; wherein an axial separation of the first landing surface and the second landing surface, as measured along the movement axis, is greater than an axial separation of the first suspension attachment formation and the second suspension attachment formation, as measured along the movement axis, such that the suspension elements are deflected along the movement axis by their attachment to the moveable part when the moveable part is at a rest position.

The invention relates to a smart electric machine (10) comprising: a permanent magnet electromechanical transducer (12); and an electronic control unit; an electromechanical transducer (12) is provided with: a permanent magnet rotor (121); and a stator (122), the stator comprising: a first assembly comprising at least three phases electrically coupled to each other in a star configuration; a second component including the same number of phases as the first component, the phases of the second component being electrically coupled to each other in a star configuration; the impedance is located between neutral points of satellites of the first component and the second component; the electronic control unit (18) comprises a control inverter comprising the same number of independent control arms as the phases in the first component and the same number of independent control arms as the phases in the second component; the control inverter is configured to drive each phase of the first component and each phase of the second component through its own control arm; the electronic control unit is configured to measure a voltage difference of neutral points of satellites of the first and second components relative to a voltage reference common to the components.

A microelectromechanical transducer assembly comprising: a first enclosure section defining an acoustic outlet port from an inner chamber to an external environment and featuring an active sound-generating element positioned and operable within the inner chamber to generate a first ultrasonic frequency; and a second enclosure section defining a passive sound-generating element acoustically coupled and operable with the active sound-generating element to generate a second ultrasonic frequency which, in combination with the first ultrasonic frequency, produces an audio band signal.

The invention describes an Nd-Fe-B permanent magnet (354) comprising 28% to 35% by weight of a rare earth element, where the total content of Nd (neodymium) and Pr (praseodymium) is between 20% to 25% by weight, where the content of Ce (cerium) is between 5% to 10% by weight, where the spatial extension is between 18 mm and 26 mm, and where the total content of Nd (neodymium) and Pr (praseodymium) is between 20% and 25% by weight. That is, the height (h) of the magnet (354) in the main magnetization direction of the Nd-Fe-B permanent magnet (354) is between 18 mm and 26 mm. A rotor assembly (350) for an electromechanical transducer (340) is also described herein.

An ultrasonic surgical instrument includes a handpiece casing and an electromechanical transducer assembly disposed inside the handpiece casing, where the transducer assembly includes a front driver and the transducer assembly has a longitudinal axis. A probe is operatively connected to the front driver at an acute angle to the longitudinal axis of the transducer assembly. A sheath surrounds the probe and is connected at a proximal end to the handpiece casing. The sheath is attached to the casing by a twist quick release coupling. A diaphragm seal inside the proximal end of the sheath blocks liquid irrigant in a cylindrical space between the sheath and the probe from penetrating proximally of a port feeding irrigant to the space. The front driver is geometrically configured to enable an angled connection of probe to handpiece proximate a nodal plane.

A capacitance increasing device for increasing the capacitance between a first machine element (22), in particular a housing (22a) of an electromechanical transducer (10), and a second machine element (16), in particular a shaft (16a) of the electromechanical transducer (10), which is mounted in a rotatable manner relative to the first machine element (22), the capacitance increasing device (24) has a first electrode (26) having a first electrode body (30) and a first electrode surface (27), the first electrode (26) being arranged at a distance from a second electrode (28) during operation of the electromechanical transducer (10), the second electrode having a second electrode body (34) having a second electrode surface (29), the second electrode surface (29) being arranged at a distance from the first electrode body (30). A functional increasing capacitance (Ce) is formed by means of a first electrode (26) and a second electrode (28), the first electrode (26) being connected in an electrically conductive manner to the first machine element (22) and the second machine element (16) forming a second electrode surface (29), in particular the second electrode (28) forming the second electrode surface (29), the second machine element is coupled to the first electrode (26) in a capacitive manner, in particular the second machine element is coupled to the first electrode surface (27) in a capacitive manner.

A flexible electromechanical transducer comprising: (a) a deformable substrate 10 comprising a polymer material and including at least one strain modifying structural feature configured to generate,

A method for determining the state of at least one sensor, the method using a first electromechanical transducer and a second electromechanical transducer that are coupled to a substrate, and a non-linear electrical circuit connected between the second electromechanical transducer and the sensor, the method comprising the steps of: applying an electrical signal at a first amplitude to the terminals of the first electromechanical transducer, and determining a first set of values of a parameter characteristic of the electrical impedance of the first electromechanical transducer in response to the application of the electrical signal; applying the electrical signal at a second amplitude to the terminals of the first electromechanical transducer, and determining a second set of values of the parameter characteristic of the impedance; measuring a difference between the first set of values and the second set of values; determining a state of the sensor on the basis of the difference between the first set of values and the second set of values.

This invention provides a method for determining and mitigating over-excursion of the internal mass of an under-attenuated electromechanical transducer. [Solution] The method of the present invention includes the steps of: determining a waveform-specific transformation that minimizes internal mass over-excursion based on playback conditions for each of a set of known playback waveforms; storing the transformation in memory; and applying the respective transformations associated with a particular known waveform and based on playback conditions during runtime and playback of a particular known waveform, wherein the step of limiting the electrically driven signal includes the steps of applying an excursion threshold to an estimated displacement signal to generate a limited displacement signal; and converting the limited displacement signal into an electrically driven signal.

A pressure measuring sensor for measuring a pressure (p), in particular an overload-resistant measuring sensor, is described, comprising a pressure sensor (5) which is arranged in an interior space (3) of a sensor housing (1) and can be exposed to a medium under the pressure to be measured (p) through an opening (7) in the sensor housing (1), by means of which the pressure measuring sensor can measure a higher pressure of a medium, in particular a hydrogen-containing medium, under the pressure to be measured at a high measuring accuracy, in particular up to 1000 bar. The pressure measuring sensor is characterized in that the pressure sensor (5) is mounted on a connection element (9) which projects into the interior space (3) and is independent in the interior (3), such that the pressure sensor (5) is exposed to the pressure (p) prevailing in the interior space (3) on all sides; the pressure sensor comprises two ceramic measuring bodies (13, 15, 13', 15') which are connected to one another while enclosing a pressure chamber (11) and each of which can be deformed by the pressure (p) acting thereon; and the pressure sensor comprises an electromechanical transducer which converts a mechanical variable which depends on the sum of the pressure-dependent deformations of the two measuring bodies (13, 15, 13', 15') into a detectable electrical measuring variable.

A method for determining and mitigating excessive excursion of an inner mass of an under-damped electromechanical transducer can include determining, based on an estimated displacement signal, an estimated excessive excursion of the inner mass in response to an electrical playback signal, and limiting, based on the estimated excessive excursion, an electrical drive signal derived from the electrical playback signal and used to drive the electromechanical transducer so as to mitigate the excessive excursion of the inner mass.

This invention relates to the field of electromechanical energy conversion control technology, and discloses an electromechanical converter drive control system for precision instruments, including: an acquisition module for acquiring stator winding current data; a calculation module for calculating the original phase duty cycle; a minimum width determination module for determining the reliability of the sampling signal; and a reconstruction module for calculating the common-mode voltage offset and reconstructing the duty cycle. This module superimposes the offset onto the original phase duty cycle and utilizes the three-phase system's degrees of freedom to shift the conduction time. While maintaining the volt-second integral equivalence of the line voltage between windings, it increases the effective pulse width of the current sampling. This invention expands the physical observation window through modulation logic reconstruction, eliminates the low modulation ratio current observation blind zone, resolves the underlying contradiction between electromagnetic thrust smoothness and feedback observability, and improves the closed-loop control accuracy of precision instruments under micro-step conditions.

An optoelectronic device including at least one electromechanical transducer located vertically in line with at least one light-emitting diode, said at least one electromechanical transducer and said at least one light-emitting diode being connected to conductive tracks of a same transfer substrate.

Method and tool (42) for machining a plug-in coil assembly (28) as well as a plug-in coil assembly (28) and a stator (10) with such an assembly.

The invention relates to an ultrasonic sensor device comprising at least one electromechanical transducer (240) and a diaphragm cup (100), wherein the base (110) of the diaphragm cup (100) comprises a diaphragm (120) and the diaphragm (120) has a longitudinal axis (180), and wherein the diaphragm (120) is delimited, at at least one end (181, 182) of the longitudinal axis (180) and on the inner face (202) of the diaphragm cup (100), by at least one groove (130) and / or at least one hole (330).

Ultrasonic sensor device comprising at least one electromechanical transducer (240) and a membrane pot (100), wherein the bottom (110) of the membrane pot (100) comprises a membrane (120) and the membrane (120) has a longitudinal axis (180), wherein the membrane (120) is bounded at at least one end (181, 182) of the longitudinal axis (180) and on the inside (202) of the membrane pot (100) by at least one groove (130) and / or at least one recess (330).

An arrangement for obtaining electrical state information related to an electrical power cable comprising at least one current sensor, at least one electrical-mechanical transducer arranged in order to receive a current sensor signal based driving signal and adapted to generate a mechanical response at a response surface based on the driving signal, a distributed acoustic sensing equipment, comprising at least one first optical fibre, and a processing portion adapted to process detected first Rayleigh backscattered light in order to at least determine the value of a current related to the power cable.