978 results about "Transductor" patented technology

The technology described herein is directed towards resonators that incorporate or are closely coupled to transducers from which energy is harvested. The resonators can be unit cells of a metasurface configured for narrowband sound absorption by phase cancellation of the acoustic wave Electroacoustic transducers such as piezoelectric transducers can be positioned, e.g., at the neck ports of the resonators, to generate electricity as the air pressure of incoming acoustic waves enters the unit cells. Energy can be harvested from the electricity, and stored for usage and / or used directly to power a device. Such a device powered by the harvested energy can change the resonant frequency of the device, e.g., by changing temperatures in the resonators' air cavities, changing respective dimensions of the respective air cavities, or changing the resonant frequency of the unit cells resonators by changing respective airflow in the respective air cavities.

The invention relates to the technical field of hemispherical harmonic oscillator assembly, in particular to a welding method and device for an assembled hemispherical harmonic oscillator, and the device comprises a vibration welding platform and a clamping assembly located above the vibration welding platform; the vibration welding platform is used for bearing the sensitive base and providing a thermal field and a vibration field needed by welding, and the clamping assembly is used for clamping the center shaft and sending the center shaft into a center hole of the base. A heating unit and a composite vibration ultrasonic transducer are arranged in the platform, and the platform is configured to apply high-frequency vibration formed by superposition of vertical longitudinal waves and horizontal torsional waves to the base. The high-frequency vibration thixotropic effect is used for reducing the viscosity of the molten solder, the ultrasonic cavitation effect is used for forcibly discharging bubbles at the bottom of the blind hole, and the sound radiation pressure generated by the vibration standing wave field is used for driving the center shaft to achieve friction-free self-centering in the hole. According to the device, the problems of air bolt pseudo soldering and rigid assembly clamping stagnation in the traditional process are solved, and the assembly coaxiality and the connection strength of the harmonic oscillator are remarkably improved.

The invention provides an ultrasonic detection method for internal defects of an insulating part of a power system based on a piezoelectric ultrasonic transducer, and belongs to the technical field of insulating part detection. After wavelet denoising and deep attenuation compensation are carried out on echo signals, sound path distance time delay and sound pressure amplitude parameters are extracted, defect identification and position estimation are carried out by utilizing a layered variational auto-encoder, a high-frequency transducer is switched to aiming at tiny defects, a harmonic component is extracted by adopting a nonlinear ultrasonic method, and a characteristic size is calculated; a defect distribution space feature matrix is generated based on a synthetic aperture focusing technology, a unified or personalized processing strategy is selected according to an acoustic characteristic homogenization degree evaluation value, a complete defect detection result is output, and the technical problem that deep weak defects in the electric insulation part are difficult to accurately detect and recognize is solved.

The invention belongs to the technical field of magnetic variable measurement, and particularly relates to a power driving compensation method and system for magnetostrictive load characteristic monitoring, and the method comprises the steps: obtaining a reference zero point of magnetic performance evolution in a cold state environment of an electromagnetic system according to the center frequency of the electromagnetic system; calculating a current main frequency impedance module value and a phase difference through an electrical parameter characterization method, and obtaining a thermal drift index reflecting a hysteresis loop distortion degree in combination with a reference zero point; obtaining correction factors of all orders based on the thermal drift index and the average output power at the current moment, and dynamically updating a coefficient vector of the inverse model; and constructing a pre-distortion driving voltage signal capable of counteracting nonlinear interference by using the new coefficient and the ideal guided wave voltage sequence, and inputting the pre-distortion driving voltage signal to a power amplifier to drive the magnetostrictive transducer. According to the invention, the problem of predistortion failure under a variable-temperature working condition in the prior art is solved, and the signal-to-noise ratio of high-power long-distance guided wave detection is remarkably improved.

A mounting system for a front view sonar transducer. A mounting system has a mounting assembly secured to a boat and a waterproof motor housing affixed to the mounting assembly. A tubular shaft extends through the motor housing and is configured to receive the front view sonar transducer at a lower portion. An electric motor is disposed within the motor housing. An input device communicates with the electric motor. The input device is configured to transmit a sequence of actuation inputs to a controller. The controller is configured to operate the electric motor to rotate the tubular shaft according to the detected sequence of actuation inputs.

The utility model discloses a material testing device under erosion and cavitation coupling action, which comprises a container, an ultrasonic transducer, an injector head and a circulating device, a placing table is arranged in the container, the ultrasonic transducer is used for being arranged above the placing table, the injector head is arranged at the lower end of the ultrasonic transducer, and the circulating device is arranged on the placing table. The circulating device comprises a booster pump, a liquid inlet of the booster pump is communicated with the container, and a liquid outlet of the booster pump is connected with the injector head through a pipeline; in the using state, the ultrasonic transducer is electrically connected with an ultrasonic power source through a wire. According to the utility model, the erosion medium is pumped into the injector head through the booster pump, and meanwhile, the ultrasonic transducer enables the erosion medium to generate a large number of bubbles in the injector head, so that the erosion medium with the bubbles impacts a test material at a high speed, and the test condition of the hydraulic mechanical material is met.

Acoustic resonator devices and filters are disclosed. An acoustic resonator includes a substrate having a surface. A back surface of a single-crystal piezoelectric plate is attached to the surface of the substrate except for a portion of the piezoelectric plate forming a diaphragm spanning a cavity in the substrate. An interdigital transducer (IDT) is formed on a front surface of the piezoelectric plate with interleaved IDT fingers of the IDT disposed on the diaphragm. Back-side fingers are formed the back surface of the diaphragm.

Various embodiments of solid state transducer (“SST”) devices are disclosed. In several embodiments, a light emitter device includes a metal-oxide-semiconductor (MOS) capacitor, an active region operably coupled to the MOS capacitor, and a bulk semiconductor material operably coupled to the active region. The active region can include at least one quantum well configured to store first charge carriers under a first bias. The bulk semiconductor material is arranged to provide second charge carriers to the active region under the second bias such that the active region emits UV light.

The invention discloses a self-adaptive configuration method for an optimal working point of a concrete hidden crack ultrasonic thermal excitation system, and the method comprises the steps: collecting multi-physical field response data of the system under different parameter combinations through constructing a parameter space containing initial coupling pressure and working frequency; constructing an excitation efficiency evaluation index based on the active power response or thermal image temperature difference of the transducer, and locking an initial optimal working point by identifying extreme value features of an index response function; performing second-order sensitivity analysis on the optimal point neighborhood by using a Hessian matrix, and constructing a tolerance elliptic model to quantify a parameter control boundary; and meanwhile, frequency and pressure drift are monitored in real time based on a power-phase decoupling mechanism of voltage and current. According to the method, the optimal working parameters can be adaptively matched for loading devices with different rigidities, the engineering tolerance is scientifically set, and the energy conversion efficiency and the detection robustness of the ultrasonic thermal excitation system are improved.

The utility model discloses a concrete crack detection device. The concrete crack detection device comprises a crack depth detector, a transducer and a transducer positioning bracket, the transducer positioning bracket comprises a central positioning seat, a sliding rod, two positioning sliding blocks and a horizontal ruler; an elastic telescopic positioning pin is arranged in the center of the bottom of the center positioning seat; the sliding rods are fixedly arranged on the central positioning seat in a penetrating manner and are symmetrically distributed relative to the positioning needle; wherein one positioning sliding block is connected to the sliding rod on one side of the center positioning seat in a sliding mode, and the other positioning sliding block is connected to the sliding rod on the other side of the center positioning seat in a sliding mode. Each positioning sliding block is provided with a transducer, and the two transducers are electrically connected with the crack depth detector. Length scales are arranged on the sliding rod; and the horizontal ruler is fixedly connected to the central positioning seat. According to the utility model, the crack center can be quickly positioned, the distance between the transducers can be accurately adjusted, and the measurement deviation can be reduced; and a steel ruler paintbrush is not needed to measure distance marks in the operation process, so that the operation is more convenient.

An acoustic wave device includes a resonator including a piezoelectric layer including first and second main surfaces opposed to each other, an upper electrode on the first main surface of the piezoelectric layer, and a lower electrode on the second main surface of the piezoelectric layer, and a capacitor including an upper interdigital transducer (IDT) electrode on the first main surface of the piezoelectric layer, and a lower IDT electrode on the second main surface of the piezoelectric layer. The capacitor is connected in parallel with the resonator. The upper IDT electrode and the lower IDT electrode of the capacitor are electrically connected to one another.

The invention discloses a device for ultrasonic-assisted additive manufacturing of a metal workpiece, and relates to the field of laser additive manufacturing, the device comprises a circular base plate, a plurality of transducers, a synchronous stretching mechanism, a supporting box, a vibration isolation mechanism, a bearing air cylinder, a first driving motor and an ultrasonic generator, the supporting box is rotationally installed on the vibration isolation mechanism, the first driving motor is used for driving the supporting box and the circular base plate fixed to the supporting box to rotate, and the bearing air cylinder is installed on the equipment base and located on the inner side of the vibration isolation mechanism. The piston end of the bearing air cylinder penetrates through the supporting box and then is connected with the synchronous stretching mechanism through a thrust bearing, the energy converter is installed at the movable end of the synchronous stretching mechanism through a floating constant force connector, and the energy converter is connected with an ultrasonic generator through a high-frequency coaxial cable. The mechanical property of the annular rotary part during laser additive manufacturing can be improved by synchronously changing the position of the transducer.

The utility model belongs to the technical field of concrete crack depth detection, and particularly relates to a concrete crack depth detection device which comprises an ultrasonic crack detector, two transducers and a transverse pipe, fixing frames are sleeved on two sides outside the transverse pipe, a disc is fixed at the plane end of each fixing frame, and an adhesive layer is adhered to one end face, far away from the fixing frames, of each disc; clamping assemblies used for clamping and fixing the transducer are installed at the two ends of the transverse pipe in a sliding mode, and a bidirectional driving assembly used for driving the two clamping assemblies to move is installed in the transverse pipe. According to the concrete crack depth detection device, the transducer is clamped on the clamping assembly, and the transverse pipe is adhered to the wall surface through the adhesive layer, so that the transducer is fixed on the wall surface without being supported by a foreign object, and the transducer does not need to be manually held and positioned, the complexity of operation is reduced, and the working efficiency is improved. And the distance between the transducer and the crack is adjusted by the bidirectional driving assembly, so that the adjustment precision of the transducer is improved, and the detection effect is effectively improved.

An audio transducer includes a diaphragm assembly. The diaphragm assembly can include a diaphragm, an attachment portion that circumferentially surrounds the diaphragm, and a flexible surround extending between the diaphragm and the attachment portion. The audio transducer can include a voice coil coupled to the diaphragm where the voice coil has a voice coil lead. The audio transducer can include a carrier that circumferentially surrounds the voice coil. The carrier can include an annular mounting surface, with the attachment portion of the diaphragm assembly being able to attach to the mounting surface, and a channel formed in the mounting surface. The voice coil lead can extend through the channel.

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.

The invention relates to the technical field of ultrasonic bonding, in particular to an ultrasonic adjusting method of a bonding system, which comprises the following steps of: acquiring voltage and displacement waveforms, analyzing a power trend, shielding a main window if a rising proportion is high and displacement exceeds a limit, extracting a maximum displacement point frequency to divide a standby window, and generating standby configuration by combining an impedance library. And monitoring peak time difference fluctuation and offset, calling configuration and matching a displacement time sequence generation instruction, monitoring displacement stability to be matched with pressure, setting a standby window as a main window if the condition is met, and generating a reconstruction mark. According to the method, the driving voltage and the transducer displacement waveform are continuously monitored, the power trend and the displacement fluctuation are analyzed in real time, the peak time difference fluctuation is synchronously monitored, the abnormal working conditions are screened to trigger the driving strategy switching, and the main frequency band is reconstructed according to the steady-state displacement characteristics. Pseudo soldering and material damage are avoided, the vibration energy utilization rate is improved, and the bonding pressure control precision and the connection strength are guaranteed.

The invention discloses a surface acoustic wave resonator and a filter. The resonator comprises an interdigital transducer arranged on a piezoelectric substrate, reflecting gratings located on the two sides of the interdigital transducer and at least one laminated protection structure arranged in the outer side area of the reflecting gratings. The laminated protection structure comprises an interdigital capacitor arranged on the surface of the piezoelectric substrate and an organic material layer covering the interdigital capacitor; two bus bars of the interdigital capacitor are electrically connected with two signal ports of the resonator respectively, and the interdigital capacitor is connected with the interdigital transducer in parallel. According to the invention, the anti-ESD capability of the resonator can be effectively improved under the condition of not increasing additional process steps and not changing the electrode structure of the normal working area of the resonator.

This utility model discloses a small multi-beam transducer structure, including: a mounting cylinder and a rotating cylinder, the rotating cylinder being rotatably connected to the bottom of the mounting cylinder; a U-shaped mounting bracket and a multi-beam transducer probe; a fixed cylinder welded to the top of the U-shaped mounting bracket, the fixed cylinder being fixedly installed at the bottom of the rotating cylinder; and the multi-beam transducer probe being rotatably connected to the bottom of the U-shaped mounting bracket via a rotating shaft. This utility model, through the rotation of the rotating cylinder and the mounting cylinder, allows adjustment of the horizontal acquisition angle of the multi-beam transducer probe, and through the rotating shaft connection, adjusts the vertical acquisition angle of the multi-beam transducer probe, thus achieving multi-angle acquisition by the multi-beam transducer probe.

The application discloses a manufacturing method of a flexible ultrasonic probe and belongs to the technical field of sensors for agricultural machinery. The flexible ultrasonic probe comprises a lower substrate layer, a lower electrode layer, a lower adhesive layer B, a transducer layer, an upper adhesive layer A, an upper electrode layer and an upper substrate layer which are sequentially stacked. The manufacturing method comprises electrode layer manufacturing and transducer layer manufacturing. The electrode layer adopts a laser cutting plus one-time transfer technology, and compared with the magnetron sputtering plus two-time transfer technology of the prior art, the electrode layer processing speed is faster, and the cost is lower. The transducer layer also adopts a laser cutting technology, and compared with the diamond wire cutting of the prior art, the operation is simple, and the processing precision is high. The flexible ultrasonic probe manufactured by the application can detect the seed arranging state in a seed arranging tube and can also be applied to other material flow detection. Compared with the infrared detection of the prior art, the flexible ultrasonic probe has strong anti-interference ability, high detection precision and low total cost.

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.

The present disclosure relates to a magnetoelectric-based wireless bioimplant (MEWB) that can transmit biological activities sensed via a pair of electrodes to an external transceiver by leveraging magnetoelectric (ME) transducer that is coupled to the implant. The MEWB is also capable of wirelessly receiving power and data via the ME transducer from external transceiver when brought closer to the implanted site (e.g., at few centimeters), thus structuring a batteryless and a leadless bioimplant. MEWB may be implanted epidermally through a pair of electrodes on an organ to capture accurate biological activities. The external transceiver may include a transmitter coil for generating an alternating magnetic field and to transmit downlink data and a receiver coil to sense a backscattered field generated by MEWB and to demodulate uplink data. The overall structure of the disclosed implant is adopted enabling compactness, miniaturization (e.g., <3cm in length and <4mm in diameter) and endovascular delivery.

A method includes receiving, by a piezoelectric stack of a transducer, a first piezoelectric voltage. The transducer has a base structure and a first layer, the base structure having a first displacement between a first portion of the base structure and the first layer. The method also includes transmitting, by the transducer, a first ultrasound frequency while receiving a first piezoelectric voltage, and receiving, by the transducer, a first bias voltage. The received first bias voltage alters the first displacement between the first portion of the base structure and the first layer, and the altered first displacement is smaller than the first displacement. The method further includes receiving, by the piezoelectric stack of the transducer, a second piezoelectric voltage to the transducer, and transmitting, by the transducer, a second ultrasound frequency while receiving the first bias voltage and the second piezoelectric voltage.

The application relates to a two-dimensional adjustable ultrasonic vibration auxiliary cutting device which comprises a vibration flat plate, a supporting base, four supporting columns, a stepped horn a, a stepped horn b, a longitudinal vibration piezoelectric transducer a and a longitudinal vibration piezoelectric transducer b. The vibration flat plate is of a stepped structure. The four supporting columns are vertically arranged, the upper ends of the four supporting columns are fixedly connected with the four corners of the vibration flat plate respectively, and the lower ends of the four supporting columns are fixedly connected with the supporting base simultaneously. The stepped horn a and the stepped horn b are horizontally arranged. The small end of the stepped horn a is fixedly connected with the center position of the left side surface of the vibration flat plate perpendicularly, and the large end is fixedly connected with the longitudinal vibration piezoelectric transducer a. The small end of the stepped horn b is fixedly connected with the center position of the back side surface of the vibration flat plate perpendicularly, and the large end is fixedly connected with the longitudinal vibration piezoelectric transducer b. The device has the characteristics of simple structure, less energy dissipation and good machining stability, and can realize efficient and low-damage milling and pin machining.

The present disclosure relates to a surface acoustic wave (SAW) device with robust metal structures, which at least provide electrically low resistance and mechanically strong connections between different inter digital transducers (IDTs) within the SAW device. Each metal structure includes a metal base section that is formed from a same metal layer as corresponding IDTs, and a metal stack over the metal base section. The metal stack includes a bottom adhesive layer over the metal base section, a bottom conductive layer over the bottom adhesive layer, an intermediate adhesive layer over the bottom conductive layer, a top conductive layer over the intermediate adhesive layer, and a top adhesive layer over the top conductive layer. The bottom and top conductive layers have a higher electrical conductivity than each adhesive layer, while each adhesive layer has a stronger adhesion strength than the bottom and top conductive layers.

The invention provides a resonance type compliant cavity composite structure pressure-resistant bending disc transducer which comprises a simply-supported ring, composite pressure-resistant assemblies are symmetrically arranged on the simply-supported ring up and down, the composite pressure-resistant assemblies and the simply-supported ring form an air cavity, and each composite pressure-resistant assembly comprises a watertight layer, a piezoelectric ceramic piece, a metal bending disc and a resonance type compliant pressure-resistant shell. The shell is arranged in the simply-supported ring, the metal bent disc is arranged above the shell, a medium cavity is formed between the shell and the metal bent disc, water permeable holes are formed in the side wall of the medium cavity, and the exterior of the transducer is communicated with the medium cavity. And a watertight layer covers the outer side. According to the composite shell structure, a pressure bearing structure and a driving structure are designed separately, pressure balance between driving force and a driving element is achieved through a coupling medium, and the anti-pressure capacity is improved; the shell is a bending vibration shell with the working frequency consistent with that of the transducer, the driving impedance is low, and the static pressure resistance is high.

A micromechanical component for a sound transducer device. The micromechanical component includes a substrate, a diaphragm, at least one piezoelectric element, and at least one electrical contact connection. The diaphragm can vibrate and is connected to the substrate. The at least one piezoelectric element is disposed between the diaphragm and the substrate and is connected to the diaphragm. The at least one piezoelectric element is designed to produce and / or detect vibrations of the diaphragm in the ultrasonic range. The at least one electrical contact connection is electrically connected to the at least one piezoelectric element. The micromechanical component can be connected, using flip chip technology, to a control circuit such that the at least one piezoelectric element can be electrically connected to the control circuit by means of the at least one electrical contact connection.

In accordance with at least one example of the description, a method comprises forming a substrate, and forming transducer elements over the substrate, each transducer element including a ferroelectric capacitor and a conductive element spaced from the ferroelectric capacitor by a dielectric material, the ferroelectric capacitor being between the conductive element and the substrate.

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 present application relates to an electric power control method and apparatus, an ultrasonic treatment system, and a storage medium. In an electric power control method of a medical device including an ultrasonic instrument having a vibration transmission member that ultrasonically vibrates, a power supply configured to supply electric power to the ultrasonic instrument, and a processor including a control unit operably connected to the power supply, the method includes controlling the supply of electric power to the ultrasonic instrument, obtaining a temperature value related to a temperature of the vibration transmission member, wherein the vibration transmission member is separate from the transducer, and controlling the power supply to reduce or stop the supply of electric power from the power supply based on a rate of change of the temperature value.

A method includes receiving, by a piezoelectric stack of a transducer, a first piezoelectric voltage. The transducer has a base structure and a first layer, the base structure having a first displacement between a first portion of the base structure and the first layer. The method also includes transmitting, by the transducer, a first ultrasound frequency while receiving a first piezoelectric voltage, and receiving, by the transducer, a first bias voltage. The received first bias voltage alters the first displacement between the first portion of the base structure and the first layer, and the altered first displacement is smaller than the first displacement. The method further includes receiving, by the piezoelectric stack of the transducer, a second piezoelectric voltage to the transducer, and transmitting, by the transducer, a second ultrasound frequency while receiving the first bias voltage and the second piezoelectric voltage.