5617results about "Mechanical vibrations separation" patented technology

Ultrasound devices and systems are disclosed in which cooling of an active acoustic element of an ultrasound transducer is achieved via an electrically conductive member that extends beyond a proximal side of the active acoustic element to contact a heat exchanger. The electrically conductive member delivers electrical driving signals to the active acoustic element while conducting heat to the heat exchanger. A region of the proximal surface of the active acoustic element that is free from contact with the electrically conductive member may also absent from contact with a liquid or a solid, thereby facilitating reflection of ultrasound energy. The heat exchanger may include an electrically insulating fluid that contacts the electrically conductive member to remove the heat conducted through the electrically conductive member. The active acoustic element may be a multilayer lateral mode element, and the electrically conductive member may form an electrode of the lateral mode element.

To provide a vibrator, a vibration unit including the same, and a controller, the vibrator being configured to suppress cracks generated when a thin-film vibrating element is attached to an attachment surface including a curved surface, while maintaining desired vibration characteristics.SOLUTION: A vibrator 10 is attached to an enclosure including a curved surface and applies a voltage to apply predetermined vibration, the vibrator including a flexible substrate 12, a vibration application area A1, and thin-film vibrating elements 11a, 11b, 11c. The vibration application area A1 is provided on the flexible substrate 12, which is touched by a finger of a user. The thin-film vibrating elements 11a, 11b, 11c are arranged in the vibration application area A1 of the flexible substrate 12 and apply vibration when electric power is supplied.SELECTED DRAWING: Figure 2

The invention belongs to the technical field of hard rock cutting and tunneling, and particularly relates to a front eccentric block excitation cutting disc rock breaking device which comprises a cutting assembly, an eccentric excitation device, a driving assembly and a supporting assembly, and the rear portion of the supporting assembly is fixedly connected with a cutting arm of a tunneling machine; the driving assembly comprises a motor, a main shaft and various connecting devices; an eccentric excitation device and a cutting assembly are mounted at the front end of the main shaft; the cutting assembly is mounted at the front end of the main shaft; the driving device ensures stable rotation of the cutterhead and enables vibration generated by the eccentric excitation device to be transmitted to the cutterhead. Vibration generated by rotation of the eccentric block is utilized to enable the cutter head to impact the rock, so that the rock is collapsed, and the rock is efficiently cut; as the cutter head cuts the rock mainly by means of vibration impact generated by the eccentric device, compared with a self-rotating mode and a traditional milling rock breaking mode and a TBM rolling mode, the efficiency of cutting the rock is improved, and the service life of the cutter is prolonged.

A sonotrode includes a stem extending along a longitudinal axis and a cap configured to carry out an ablative process on tissue using mechanical oscillation. The cap has at least one portion that protrudes further in a radial direction than the stem, and the at least one portion has at least one sharp rim. A surface of the cap, which is arranged between a distal end of the stem and the sharp rim of the portion, is a concave surface and / or runs at an opening angle with respect to the stem that is equal or smaller than 90 degrees. A center of mass of the cap is on the longitudinal axis.

A mist inhaler device (200) for generating a mist including a therapeutic for inhalation by a user. The device includes a mist generator device (201) and a driver device (202). The driver device (202) is configured to drive the mist generator device (201) at an optimum frequency to maximise the efficiency of mist generation by the mist generator device (201).

The invention discloses a planar phased array ultrasonic transducer, and relates to the technical field of transducers, the planar phased array ultrasonic transducer comprises a 1-3 type piezoelectric composite board, a common positive electrode panel and a flexible circuit board, the 1-3 type piezoelectric composite board comprises a polymer frame and a plurality of PZT piezoelectric ceramic columns, all the PZT piezoelectric ceramic columns are embedded in the polymer frame in an array, and the PZT piezoelectric ceramic columns are connected with the flexible circuit board. One end of each PZT piezoelectric ceramic column is a positive electrode end, the other end of each PZT piezoelectric ceramic column is a negative electrode end, the common positive electrode panel is connected with the positive electrode ends of the PZT piezoelectric ceramic columns, the flexible circuit board is provided with a bonding pad area and at least one pin area, the bonding pad area is fixedly provided with a plurality of bonding pads, the pin area is fixedly provided with a plurality of pins, and the flexible circuit board is provided with a plurality of conductive terminals. All the pins, all the bonding pads and all the negative electrode ends of the PZT piezoelectric ceramic columns are in one-to-one correspondence, the bonding pads are electrically connected with the pins, and the bonding pads are connected with the negative electrode ends of the PZT piezoelectric ceramic columns; according to the invention, the PZT is applied to the planar phased array ultrasonic transducer.

An ultrasonic oscillator element, including a substrate, a first lower electrode, a first insulating layer, a second insulating layer, a second lower electrode, a first upper electrode, and a third insulating layer. The first lower electrode is disposed on the substrate. The first insulating layer is disposed so that the first lower electrode is located between the first insulating layer and the substrate. The second insulating layer and the first insulating layer form a first cavity. The second lower electrode is disposed adjacent to the first side of the second insulating layer and located in the outer region of the first cavity. The first upper electrode is disposed on the second side of the second insulating layer. The third insulating layer is disposed so that the second lower electrode is located between the third insulating layer and the first insulating layer.

A user input component for an electronic device includes a haptic engine, a pressing surface, and a force sensor. The force sensor detects force applied by a user to the pressing surface and from this value and a spring constant of a supporting structure, an approximate displacement distance can be determined. The displacement distance can be used either directly or indirectly to select a drive current for a coil configured to provide haptic effect along the same direction of the user pressing force.

The invention belongs to the technical field of acoustic devices and ultrasound, and discloses an ultrasonic transducer, a multi-layer gradient acoustic impedance matching layer and a preparation method of the multi-layer gradient acoustic impedance matching layer, and the multi-layer gradient acoustic impedance matching layer comprises a plurality of acoustic impedance layers which are arranged in sequence and have different acoustic impedances; in the direction from the first acoustic impedance layer to the last acoustic impedance layer, the acoustic impedance of the acoustic impedance layer is in a decreasing trend; the surface of the previous acoustic impedance layer is provided with a micro-columnar structure, the micro-columnar structure extends into the next acoustic impedance layer, a mechanical interlocking interface is formed between the previous acoustic impedance layer and the next acoustic impedance layer through the micro-columnar structure, and the micro-columnar structure is gradually thinned from the bottom to the tip. According to the invention, the gradient impedance design of the acoustic impedance layers significantly reduces the acoustic reflection between the acoustic impedance layers, improves the acoustic energy transmission efficiency, and widens the working bandwidth of the ultrasonic device; the micro-columnar structure not only maintains the stability of interlayer adhesion in a high vibration or thermal stress environment, but also further smooths gradient transition and reduces interface reflection.

A hydraulic vibration generation device or hydraulic motor is provided. The device includes a manifold having an inner volume with a pressure chamber formed in the inner volume, a fluid inlet orifice and a fluid outlet orifice. The device further includes a vibration generating member having a grooved drive and an off-center weight and retaining plates. The inner volume receives the vibration generating member within it. The vibration generating member rotates and generates vibration in response to hydraulic fluid flowing into the manifold through the inlet orifice and directed through the pressure chamber, relieves pressure upon exiting the pressure chamber into a pressure relief channel and out of the manifold through the outlet orifice. Also provided a hydraulic motor with a same manifold and pressure chamber, but with a power generating member having the same groove drive without an off-center weight. Rotation of the power generating member generates power.

The invention relates to an ultrasonic transducer capable of realizing a high torsional vibration-longitudinal vibration amplitude ratio and a design method thereof. The ultrasonic transducer comprises a piezoelectric ceramic vibrator 3, an amplitude-change pole 2 and a tool head 1 which are connected in sequence, the shape of the amplitude-change pole is formed by rotating a specific geometric curve around the axis. The interior of the amplitude-change pole is of a cavity structure 5, the wall thickness distribution of the amplitude-change pole is adjustable, the cavity structure is a through hole or a blind hole, and the shape of the cavity structure is an equal-diameter cavity extending along the axis or a special-shaped cavity formed by rotating a specific geometric curve around the axis. By optimizing the internal cavity structure and the wall thickness distribution and adjusting the amplitude proportion between torsional vibration and longitudinal vibration, the longitudinal vibration of the transducer can be converted into longitudinal torsional vibration, so that the transducer has both longitudinal vibration and torsional vibration. Due to the unique cavity type structure in the amplitude-change pole, the amplitude ratio of generated torsional vibration to longitudinal vibration can be larger, the ultrasonic effect with the high torsional vibration-longitudinal vibration amplitude ratio can be generated, and vibration output with the high torsional vibration-longitudinal vibration amplitude ratio can be achieved.

An ultrasonic transducer device including a substrate and an ultrasonic oscillation unit is provided. The ultrasonic oscillation unit is disposed on the substrate. The ultrasonic oscillation unit includes a first electrode layer, a first insulating layer, a second electrode layer, a second insulating layer, a plurality of capacitor protrusions, and a cavity located between the first insulating layer and the second insulating layer. The capacitor protrusions are disposed in the cavity by being disposed on at least one of the first insulating layer and the second insulating layer. The first insulating layer and the second insulating layer are separated by a gap and are located between the first electrode layer and the second electrode layer. The height of each of the capacitor protrusions is less than a height of the gap.

A system may include an array of sensor elements, the array of sensor elements each comprising a first type of passive reactive element, a second type of passive reactive element electrically coupled to the array of sensor elements, a driver configured to drive the array of sensor elements and the second type of passive reactive element, and control circuitry configured to control enabling and disabling of individual sensor elements of the array of sensor elements to ensure no more than one of the array of sensor elements is enabled at a time such that when one of the array of sensor elements is enabled, the one of the array of sensor elements and the second type of passive reactive element together operate as a resonant sensor.

The electrostatic film ultrasonic transducer comprises a vibration layer, a non-vibration layer, a supporting column and an insulating layer, the frame of the vibration layer is attached to the frame of the non-vibration layer, and an air gap is formed between the vibration layer and the non-vibration layer through the supporting column after the frame of the vibration layer is attached to the frame of the non-vibration layer. The insulating layer is located between the supporting column and the first conductive layer or between the supporting column and the bottom electrode, the air gap is vacuum or filled with gas not prone to ionization, and / or the insulating layer is not prone to ionization. According to the electrostatic film ultrasonic transducer, air ionization is not easy to occur in the air gap, and / or charges are not easy to lose on the insulating layer, so that the accumulation of static electricity on the surface of the insulating layer can be reduced, the influence of the charges generated by air ionization on air partial pressure is greatly reduced, and the reliability and sound pressure of the electrostatic film ultrasonic transducer can be improved.

An information processing device according to embodiments controls a vibration device including a plurality of vibrators and configured to apply vibration to a user in response to an input signal. The information processing device identifies a directional component of the object constituting a vibration source relative to the vibration device in input content and controls an amplitude and a delay of each of the vibrators, based on the directional component.

The present invention relates to multi-stake underwater transducers and arrays for the generation and reception of sound waves in water. The invention provides the design and fabrication of compact piston-type underwater transducers of low-to-mid operating frequency made of piezoelectric single crystals without the need of any pre-stress mechanism. The invention uses a multi-stake pipe-like motor section made of piezoelectric single crystals of high transverse mode piezoelectric coefficients and low acoustic impedance, and small-diameter and light head mass(es). The present invention also discloses various means of increasing the bandwidth of the multi-stake underwater transducers as well as derivative transducers and arrays made of them, including compact 2D and 3D omni-directional transducers, planar, conforming and shaped arrays of various designs, high-density arrays and low-drop-down-ratio parametric arrays of either single or dual frequency bands.

The invention relates to the technical field of ultrasonic cutting, in particular to a sawtooth-shaped circular knife ultrasonic cutting acoustic system which comprises a main shaft, an ultrasonic vibrator and an ultrasonic cutting tool, the ultrasonic vibrator is connected with the main shaft, the ultrasonic cutting tool is installed on the side, away from the main shaft, of the ultrasonic vibrator, and a plurality of sawtooth grooves are formed in the peripheral face of the ultrasonic cutting tool. The sawtooth grooves are annularly distributed at equal intervals, and sawteeth are formed between every two adjacent sawtooth grooves. According to the ultrasonic cutting tool, the sawtooth grooves are formed in the peripheral surface of the ultrasonic cutting tool, so that the machining mode of the workpiece is intermittent cutting, the contact time of the ultrasonic cutting tool and the workpiece is shortened, and then friction resistance generated by contact between the ultrasonic cutting tool and the workpiece is reduced; heat generated between an ultrasonic cutting tool and a workpiece in the workpiece machining process can be greatly reduced, heat is released through non-contact gaps, and cutting force is reduced by reducing friction resistance.

The permanent magnet type dual-drive electric vibration exciter comprises a magnetic circuit assembly and a moving coil assembly, the magnetic circuit assembly comprises a magnetic steel ring, an upper permanent magnet, a lower permanent magnet, a center magnetic pole and a bottom connecting plate, a first containing space and a second containing space are arranged in the magnetic steel ring, the upper permanent magnet is arranged in the first containing space, and the lower permanent magnet is arranged in the second containing space. The moving coil assembly comprises a moving coil framework, a first driving coil and a second driving coil, the first driving coil and the second driving coil are wound on the moving coil framework, the upper permanent magnet, the magnetic steel ring and the center magnetic pole form an upper magnetic field ring space, the first driving coil is located in the upper magnetic field ring space, and the second driving coil is located in the lower magnetic field ring space. The lower permanent magnet, the magnetic steel ring and the central magnetic pole form a lower magnetic field ring space, the second driving coil is located in the lower magnetic field ring space, the central magnetic pole is arranged in the magnetic steel ring, and the bottom connecting plate is arranged at the bottom of the lower magnetic steel ring; two independent magnetic field loops are established, a larger magnetic field is achieved, thrust is increased, the utilization rate of the magnetic field is improved, and higher vertical vibration precision and smaller transverse vibration are achieved.

A row-column ultrasound transducer array is controlled to perform excitation in the azimuth dimension with two sets of excitation signals in quadrature. The two sets of excitation signals are delivered such that adjacent transducer elements are simultaneously provided excitation signals in quadrature, or such that transmit events occur temporally in series for synthetic imaging, with each transmit event being generated using a respective set of excitation signals. Separate bias apertures are applied in the bias (elevation) direction for each set of excitation signals, such that elements driven according to one set of excitation signals are biased, in the elevation direction, according to one bias aperture, and the elements driven with quadrature excitation signals are biased according to another bias aperture. The bias apertures are selected such that their combination results in the generation of a Fresnel aperture with fine and controllable phase resolution beyond that of a conventional row-column transducer.

A sonotrode (10) has knurled projections and recesses (10b) formed by a plurality of projections (11) on a first end face (10a). Among the plurality of projections (11), at least one pair of projections arranged symmetrically at both outermost ends in one direction along a direction of oscillation are asymmetric surface projections (11a and 11b). In each of the asymmetric surface projections (11a and 11b), an angular value (θb) of an outer inclination angle is smaller than an angular value (θa) of an inner inclination angle.

The invention relates to the field of pressure (0-200 kPa) detection, in particular to an MEMS integrated pressure sensing device or a monolithic integrated multi-frequency capacitive micromachined ultrasonic transducer (CMUTs) for wide-range pressure measurement. According to the monolithic integrated multi-frequency CMUTs, a first CMUTs, a second CMUTs and a third CMUTs are integrated on a chip; by adjusting the diaphragm thickness, cavity height and diaphragm radius of the first, second and third CMUT units and the pressure value in the cavity of the second CMUT unit, the first and second CMUT units work in a linear range of small deflection deformation, and the third CMUT unit works in a linear range of large deflection deformation. And the working ranges of the first CMUT unit, the second CMUT unit and the third CMUT unit form a continuous and complete measurement interval, and the resonant frequencies are not overlapped, so that the integrated pressure sensing device which can be used for 0-200 kPa full-pressure range measurement is realized.

Disclosed herein are ultrasound transducers that are selectively insulated to thereby enable the transducers to be exposed to an electrically conductive fluid without causing a short circuit between electrodes of the transducers. Such a transducer includes a piezoelectric transducer body having a first surface and a second surface that are spaced apart from one another and do not intersect with one another. The ultrasound transducer also includes a first electrode disposed on the first surface, a second electrode disposed on the second surface, and an electrical insulator covering only one of first and second electrodes and configured to inhibit electrical conduction between the first electrode and the second electrode when the ultrasound transducer is placed within an electrically conductive fluid. Also disclosed are apparatuses and systems that include such a transducer. Related methods are also disclosed herein.

To provide a micromachined ultrasonic transducer (MUT) including an electrode designed to improve both acoustical and electrical performances of the transducer.SOLUTION: A micromachined ultrasonic transducer (MUT) (720) includes a substrate; a membrane suspending from the substrate; a bottom electrode disposed on the membrane; a piezoelectric layer disposed on the bottom electrode, and an asymmetric top electrode (722) disposed on the piezoelectric layer. The areal density distribution of the asymmetric electrode (722) along an axis (742) has a plurality of local maxima, and locations of the plurality of local maxima coincide with locations (726) (728) where a plurality of anti-nodal points at a vibrational resonance frequency is located.SELECTED DRAWING: Figure 7B

A four-dimensional ultrasound imaging system, the system comprising an ultrasound main unit, a multi-channel capacitive ultrasound probe arranged in a two-dimensional area array, and an ASIC chip integrated at the probe end. The ASIC chip is internally provided with a transmitting driving circuit and a receiving circuit, which are used for driving the probe to emit ultrasound wave beams in different directions and receiving reflected echo signals. The present application comprises: the ASIC chip performing microchip beam synthesis preprocessing and reduction of the number of channels on received signals, and then transmitting the processed signals to the ultrasound main unit for beam synthesis, so as to obtain a gray value and coordinate values of each point in a beam direction; repeating the described steps until a static three-dimensional image is obtained; and continuing executing the described steps cyclically to obtain a four-dimensional ultrasound image. Integrating the ASIC chip at the probe end can achieve driving and post-processing of the multi-channel probe with fewer lead-out lines, and the subsequent imaging processing is carried out in a processor in the ultrasound main unit, thereby making the volume of processing data smaller, simplifying lead packaging, and improving the data processing efficiency.

The invention relates to the technical field of ultrasonic detection, and discloses an ultrasonic probe based on a thermoacoustic effect, comprising: a thermoacoustic generator comprising a driving device and a sounding film, the thermoacoustic generator being configured to generate input excitation signals of different frequencies through the driving device, the sound production film is driven to generate an ultrasonic signal according to the input excitation signal, the ultrasonic signal is transmitted to the to-be-detected area, and the frequency of the ultrasonic signal corresponds to the frequency of the input excitation signal; the ultrasonic sensor comprises an imaging device and a sound receiving film, the sound receiving film is configured to receive an echo signal from the to-be-detected area, and the imaging device is configured to analyze an amplitude characteristic, a time characteristic and a spectrum response characteristic of the echo signal so as to generate a detection image of the to-be-detected area according to an analysis result. The sound production frequency adjusting capability of the ultrasonic probe can be remarkably improved, the operation process of ultrasonic imaging is greatly simplified, and the imaging requirements of different organs from low frequency to high frequency are met.

According to the invention, the ultrasonic device for skin treatment comprises an external part which is composed of a device body, the middle part of the device body is provided with an indicating lamp for indicating the operation state of the device, a switch for turning on and turning off the device and a mechanism part, and the mechanism part is composed of energy connected to a circuit control panel. The circuit control panel comprises a short circuit detection circuit, a Bluetooth and / or Wi-Fi receiver and transmitter and a skin temperature monitoring circuit. The circuit control panel transmits current to the electromagnetic electrode and the electrical stimulation muscle electrode ultrasonic transducer, and the ultrasonic transducer is composed of a deeper-focal-length ultrasonic transducer and a shallow-focal-length ultrasonic transducer. Two transducers, each consisting of electrodes, are connected to a piezoelectric material for transmitting electrical energy to the piezoelectric material, and a solid or semi-solid material that can transmit ultrasonic waves for strengthening the ultrasonic waves to a desired skin layer.

The utility model provides an electromagnetic electro-hydraulic composite vibration device which comprises a cylinder body, a magnetic cylinder ring arranged on the side edge of the cylinder body in the axial direction and a piston penetrating through the cylinder body in the axial direction, an excitation piece is arranged in the magnetic cylinder ring, a driving coil is arranged on the piston, and the excitation piece is connected with the driving coil. The middle of the piston protrudes outwards in the axial direction to form a stress protrusion, the stress protrusion abuts against the cylinder body in the radial direction, the driving coil is used for being matched with an excitation piece to drive the piston to move in the axial direction, and the cylinder body is hollow to form an upper hydraulic cavity and a lower hydraulic cavity which are located on the two sides of the stress protrusion. The cylinder body is provided with a first hydraulic runner and a second hydraulic runner which are used for being communicated with the upper hydraulic cavity and the lower hydraulic cavity respectively. According to the electromagnetic electro-hydraulic composite vibration device and the vibration table, electromagnetic vibration and electro-hydraulic vibration can be achieved on one vibration table, the bandwidth coverage is wide, and compared with two sets of equipment which operate independently, the cost is lower, and the occupied area is smaller.