84 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.

The invention relates to the technical field of electromechanical cloud management and control, in particular to an electromechanical converter cloud edge collaborative management and control system which comprises a cloud edge collaborative management and control center, an edge management module, a task division module, a dynamic distribution module, a distribution evaluation module, a collaborative management module and an execution feedback layer. According to the method, analysis is preliminarily carried out from the angle of historical data processing capability of the edge node so as to preferentially match the equipment end, and meanwhile, division processing is carried out according to the task quantity and the task type, so that the tasks submitted by the equipment end are reasonably distributed to the edge node and the cloud server, and the efficiency is improved. Analysis is deeply carried out from a single-point angle and an overall angle through an information feedback mode, that is, rationalized and targeted management is carried out on the edge nodes from the single-point angle, so that the resource dynamic allocation performance of the edge nodes is improved, collaborative management demand analysis is carried out on collaborative performance data from the overall angle, and the resource dynamic allocation performance of the edge nodes is improved. The collaborative management efficiency among the equipment end, the edge end and the cloud server is improved.

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 invention relates to the technical field of control or regulation of a motor, a generator or an electromechanical transducer, and provides a closed-loop control wire drawing machine control system which comprises a PLC (Programmable Logic Controller), the PLC is connected with and controls a plurality of drivers, each driver is connected with and controls a rotary encoder, each rotary encoder is correspondingly installed on a permanent magnet synchronous motor, and each permanent magnet synchronous motor is correspondingly installed at the end of a winding drum and drives the winding drum to rotate. The PLC controller obtains the feedback frequency of the permanent magnet synchronous motor through the driver, compares the feedback frequency with a given frequency, and adjusts the given frequency based on a comparison result. The encoder device is additionally arranged at the motor end, actual output is compared with expected output, control input is adjusted according to error signals, the output is made to be close to an expected value, the anti-interference capacity is high, the control precision is high, speed matching control between a front coil and a rear coil is better, the probability of wire breakage during drawing is reduced, the drawing speed is increased, and the production efficiency is high.

A bending transducer includes a deflectable element, a microelectromechanical transducer extending along a centroid fiber of the deflectable element deflecting the deflectable element in a first direction when a first electrical signal is applied, and a second microelectromechanical transducer extending along the centroid fiber deflecting the deflectable element in a second direction opposite to the first direction when a second electrical signal is applied, the centroid fiber being located between sides of the first and second microelectromechanical transducers facing away from each other, and an electrical control configured to vary the first and second electrical signals depending on an input signal such that a change of the first electrical signal and a change of the second electrical signal depends on the electrical input signal, and the phases of the first and second electrical signals are shifted relative to each other. A bending transducer operated as sensor is also presented.

An apparatus (460, 560) and method for manufacturing a sintered flux focusing permanent magnet (250, 350) are described. The apparatus includes (a) a mold (470, 570); and (b) a first magnetic device (461, 561-1, 561-2) and a second magnetic device (464, 564). The first magnetic device (461; 561-1, 561-2) includes a first yoke structure (463; 563-1, 563-2) having a first shape, and the second magnetic device (464, 564) includes a second yoke structure (466, 566) having a second shape. The second shape is spatially different from the first shape. In addition, the spatial difference in the shapes of the two yoke structures (463, 466; 563-1, 563-2, 566) causes a non-uniform magnetic field, so that the magnetic field within the mold cavity (472, 572) is associated with an extended angular distribution of magnetic flux lines. A sintered flux focusing permanent magnet (250, 350) manufactured using the method, an electromechanical transducer (140) including the sintered flux focusing permanent magnet (250, 350), and a wind turbine (100) are further described.

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 ultrasonic surgical instrument includes a handpiece casing and an electromechanical transducer assembly disposed within the handpiece casing, where the transducer assembly includes a forward driver, the transducer assembly having a longitudinal axis. A probe is operatively connected to the forward driver at an acute angle relative to the longitudinal axis of the transducer assembly. A sheath surrounds the probe and is connected to the handpiece casing at a proximal end. The sheath is attached to the casing by a twist-type quick release connection. A diaphragm seal disposed within the proximal end of the sheath prevents liquid irrigant in a cylindrical space between the sheath and the probe from entering a location proximal to a port that supplies irrigant to the space. The forward driver is geometrically configured to allow for an angled connection between the probe and the handpiece near a nodal plane.

Tool holder (1) for holding a tool (4) and for the rotational coupling of the tool (4) to a rotary drive of a machine tool, wherein in an operating state the tool holder and the tool held therein rotate about a working axis (A) driven by the rotary drive, wherein the tool holder comprises: a) at least one flow channel (5) surrounded by a channel wall (3) for the flow of a fluid cooling and / or lubricating medium (KS) to the tool (4) in the operating state, b) at least one measuring device (30) for measuring at least one operating variable in the operating state, c) at least one wireless transmission device (31) for wirelessly transmitting measurement data or measurement signals from the measuring device (30) and c) an energy generator (11, 12, 15, 16, 19, 20) for autonomously supplying the at least one measuring device (30) and the at least one transmission device (31) with electrical energy, d) where the energy generator d1) at least one moving body (11, 12) arranged in the flow channel (5) and, in the operating state, in the fluid cooling and / or lubricating medium (KS) flowing through it, and further d2) at least one electromechanical transducer (15, 16, 19, 20) coupled to the moving body (11, 12) for converting a movement (V1, V2, V3, V4) of the at least one moving body (11, 12) generated by the flowing cooling and / or lubricating medium (KS) into electrical energy for the at least one measuring device (30) and the at least one communication device (31).

A mold for manufacturing a permanent magnet is described. The mold includes: a first mold portion including a first curved surface; a second mold portion including a second curved surface, wherein the first mold portion and the second mold portion are made of a ferromagnetic material. The mold also includes a third mold portion having a molding chamber, wherein the third mold portion is arranged between the first mold portion and the second mold portion, and wherein the first mold portion and the second mold portion are made of a different material than the third mold portion. The first curved surface and the second curved surface are formed so that magnetic flux passing through the first mold portion, the second mold portion, and the third mold portion is guided so that a diffuse magnetic flux can be generated in the molding chamber. Furthermore, a system for manufacturing such a magnet, a method for manufacturing a permanent magnet, and a permanent magnet manufactured using this method are described. Furthermore, an electromechanical transducer and a wind turbine including such a permanent magnet are described.

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.

A liquid discharge head includes: an actuator substrate; an electromechanical transducer held by the actuator substrate; a damper; and a damper holding substrate holding the damper, wherein the damper disposed between the actuator substrate and the damper holding substrate and joined to the actuator substrate and the damper holding substrate with an adhesive, the damper has a joint portion having a recess or a through hole.

The present invention describes a bending transducer operating as an actuator, comprising a deflectable element, a microelectromechanical transducer extending along a centroid fiber of the deflectable element, the microelectromechanical transducer deflecting the deflectable element in a first direction when a first electrical signal is applied; and a second microelectromechanical transducer extending along the centroid fiber, the second microelectromechanical transducer deflecting the deflectable element in a second direction opposite to the first direction when a second electrical signal is applied; wherein the centroid fiber is located between the sides of the first and second microelectromechanical transducers facing away from each other; and an electrical control element configured to change the first electrical signal and the second electrical signal according to an input signal, so that the change of the first electrical signal and the change of the second electrical signal depend on the electrical input signal, and the phases of the first and second electrical signals are offset relative to each other. The present invention also proposes a bending transducer operating as a sensor.

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 determining and reducing an excessive deflection of an internal mass of an electromechanical transducer may include measuring a sense signal associated with the electromechanical transducer in response to a drive signal applied to the electromechanical transducer, determining a nonlinearity value based on the sense signal, mapping the nonlinearity value to a probability of excessive deflection of the internal mass, and applying a gain based on the probability to a signal path configured to generate the drive signal.

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.

The invention discloses a piezoelectric ultrasonic tactile sensor, and relates to the technical field of sensors. The piezoelectric ultrasonic tactile sensor includes: a double-layer flexible printed circuit board; the piezoelectric micro-electro-mechanical transducer array is integrated in the double-layer flexible printed circuit board and is used for transmitting ultrasonic waves to the surface of a measured object and receiving reflection echo signals; the signal processing unit is integrated in the double-layer flexible printed circuit board and is used for sequentially carrying out amplification, filtering and analog-to-digital conversion processing on the reflection echo signal to generate an echo digital signal; the echo digital signal is used for identifying the surface characteristics of the measured object; the sensor provided by the invention can realize high-precision non-contact tactile perception in a complex environment, has flexible adaptation and anti-interference characteristics, and remarkably improves the stability and measurement reliability in a dynamic scene.

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.

To provide a technique with improved structural arrangement.SOLUTION: An electromechanical converter 100 comprises: a structure portion 120 integrally formed from two pairs of magnets 124, a pair of yokes 122 that guide a magnetic flux caused by the magnets 124, and a coil 128 that is arranged in a space surrounded by the yokes 122 and side plates 126; an armature portion integrally formed from an armature 130 disposed inside the space of the structure portion 120 so as to pass through the coil 128, and housings 110, 112 that internally house the structure portion 120 and the armature 130 in a state of being mutually linked to the armature 130; and leaf springs 140 configured so as to be capable of imparting an elastic restoring force to both the housings 110, 112 and the structure portion 120 in a state of being disposed therebetween, thereby allowing relative vibration between the structure portion 120 and the armature portion.SELECTED DRAWING: Figure 2

A mounting device configurable to hold a plurality of pickups in a stringed instrument noninvasively and with minimal vibration. Provided is a means of readily repositioning the pickups vertically, linearly, and radially, resulting in an abundance of immediate tonal options. Further provided is a means of readily adjusting a positional tension to achieve a preferred friction for slanting, sliding, or securing each pickup into 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.

An apparatus (460) and a method for manufacturing a permanent magnet (250, 350) are described. The apparatus (460) includes (a) a mold (470); (b) a first magnetic device (461) and a second magnetic device (464); (c) a mold; and (d) a magnetic element (480) for spatially guiding and / or changing magnetic flux. The magnetic element is located in a region extending between the first magnetic device and the second magnetic device and is movably supported in the region so that in a first position (480a), a first spatial magnetic flux distribution is provided, and in a second position (480b), a second spatial magnetic flux distribution different from the first spatial magnetic flux distribution is provided. A magnet (350) manufactured using the method, an electromechanical transducer (140) including such a magnet (350), and a wind turbine (100) are further described.

A microelectromechanical transducer assembly comprising: an enclosure defining an interior chamber and an opening from the interior chamber to a surrounding ambient environment; a first sound radiating member operable to produce a first frequency; and a second sound radiating member arranged parallel to the first radiating member and operable to produce a second frequency that in combination with the first frequency generates an audible sound output.

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.

There is described a terahertz modulation system. The terahertz modulation system generally has a terahertz signal emitter emitting a terahertz signal along a path; a modulation unit having a substrate and an electromechanical transducer actuatably mounted to said substrate, said electromechanical transducer having a terahertz interacting surface in said path receiving said terahertz signal and moving in back-and-forth sequences between first and second positions relative to said path upon actuation with a modulation signal, said moving modulating at least a portion of said terahertz signal; and a terahertz signal detector downstream from said modulation unit along said path, said terahertz signal detector synchronously measuring said modulated portion of said terahertz signal using said modulation signal, and generating a differential signal indicative thereof.

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.