17 results about "Ultrasonic actuator" patented technology

The invention relates to the technical field of piezoelectric pumps, in particular to a high-output-performance micro piezoelectric pump which comprises a pump body, an ultrasonic actuator which is arranged in the pump body and divides a pump cavity into a first cavity and a second cavity, and a first air inlet channel, a first air outlet channel, a second air inlet channel and a second air outlet channel which communicate with the two cavities correspondingly. A series connection piece is arranged between the first air outlet channel and the second air inlet channel, so that the two cavities are connected in series to improve the output pressure; or a parallel connecting piece is arranged between the first air outlet channel and the second air outlet channel, so that the two cavities are connected in parallel to improve the output flow. The double independent cavities are arranged in the single pump body and matched with a selectable series-parallel connection structure, so that the output pressure or flow of the pump is increased under the condition that the overall size is not increased, the miniaturization design of products is facilitated, meanwhile, the flow channel resistance is reduced, and the transmission efficiency is improved.

An ultrasonic transducer 600 comprising: a back mass 601; a front mass 602; an ultrasonic actuator arrangement 607 held between the back mass and front mass; an ultrasonic horn arrangement 603 forward of the front mass; and a blade 611 having a bend. These components are arranged along a longitudinal axis of the transducer. Vibrations generated are conducted into the front mass and into the ultrasonic horn arrangement along a vibrational energy transfer path. One or more of the back mass, front mass; wherein the ultrasonic horn arrangement comprises means for controlling the orientation of motion in a direction along a vibrational energy transfer path. Vibrations may be amplitude amplified by the ultrasonic horn. The front mass and / or ultrasonic horn may be radially asymmetric. One or more of the back mass, front mass and ultrasonic horn arrangement may, have a plurality of openings (409, Fig.4c) towards the longitudinal axis and intersecting the vibrational energy transfer path, or may be made from at least two materials having different densities. This advantageously compensates for asymmetry in the transducer's vibration pattern introduced by the radial asymmetry of the blade.

Methods and systems measuring structural parameters characterizing a measurement target based on change in measurement signal values and estimated changes in electrical properties, optical properties, or both, of the measurement target due to variation of mechanical stress are presented herein. The electrical and optical properties of a measurement target are perturbed by including a mechanical wave within the measurement target under measurement. In preferred embodiments, the mechanical wave is excited by an ultrasonic actuator in contact with a back side of a wafer under measurement. Both the changes in the measurement signal values and estimated changes in the electrical, properties, optical properties, or both, of the measurement target are quantifies, or both, of the measurement target are quantified and provided as input to a measurement model. In this manner, the measurement is based on the derivatives of measurement signals with respect to electrical properties, optical properties, or both.

Described and illustrated is an ultrasonic flowmeter (1) comprising a measuring tube (2), a first ultrasonic transducer (3), a second ultrasonic transducer (4), and a control and evaluation unit (5), wherein the first ultrasonic transducer (3) and the second ultrasonic transducer (4) are arranged axially offset on the measuring tube (2), wherein the first ultrasonic transducer (3) is configured at least as an ultrasonic actuator (6), wherein the second ultrasonic transducer (4) is configured at least as an ultrasonic sensor (7), wherein, in the operating state of the ultrasonic flowmeter (1), the control and evaluation unit (5) controls the ultrasonic actuator (6) such that a guided ultrasonic wave (9) is excited in the measuring tube (2) through which a fluid (8) flows.wherein the ultrasonic sensor (7) receives the guided ultrasonic wave (9) and the control and evaluation unit (5) determines a flow velocity (v) of the fluid (8) by evaluating the received guided ultrasonic wave (9). An advantageous excitation of guided ultrasound waves is achieved by having at least the ultrasound transducer (3) designed as an ultrasound actuator (6) have several excitation structures (10) in the axial direction of the measuring tube (2), wherein the excitation structures (10) are spaced apart from each other in the axial direction of the measuring tube (2), wherein ultrasound waves are fed into the measuring tube (2) through which the fluid flows by means of the excitation structures (10), so that a wave pattern of at least one predetermined wave mode (m_det) of the guided ultrasound wave (9) is excited in the measuring tube (2) through which the fluid (8) flows, spatially distributed in the axial direction of the measuring tube (2).

The invention relates to an angular adjustment device (1) comprising: an ultrasonic actuator (3) which includes a resonator (2) and is in the form of a piezoelectric hollow cylinder (4) having at least one planar or conical end face (5) and friction elements (6) arranged thereon; an angular adjustment element (8) which has a spherical friction surface (7), is pressed against the friction elements (6), and can be adjusted about any axis with respect to its angular position by means of the ultrasonic actuator (3); and an electrical excitation device (26), wherein the resonator (2) is divided into three identical segments (9) by three virtual diametrical half-planes (P1, P2, P3), and wherein each of these segments (9) has an excitation electrode (10), a common electrode (11), and piezoelectric material (17) arranged between the excitation electrode (10) and the common electrode (11), and each segment forms a generator of an acoustic standing wave (12), wherein one of the friction elements (6) is arranged on at least one end face (5) of each of the segments (9), either between the segments (9) or in the central region of a segment (9). The invention also relates to a method for operating such an angular adjustment device.

An ultrasound transducer for surgical applications is disclosed. The ultrasonic transducer includes: a rear mass; a front mass block; an ultrasonic actuator device held between the rear mass and the front mass; the ultrasonic amplitude-change pole device is positioned in front of the front mass block; and a threaded fastener. The rear mass, the ultrasonic actuator device, the front mass and the ultrasonic horn device are arranged along a longitudinal axis of the transducer. A threaded fastener extends through the rear mass and the ultrasonic actuator device and is coupled to the front mass or the ultrasonic horn device. The ultrasound transducers have improved energy transfer, and are cheaper and / or easier to assemble.

The invention relates to an ultrasonic flow measuring device, comprising a measuring tube, a first and a second ultrasonic transducer, which are arranged axially offset on the measuring tube and are designed as an ultrasonic actuator and an ultrasonic sensor, and a control and evaluation unit, in the operating state, the control and evaluation unit actuates the ultrasonic actuator in order to excite guided ultrasonic waves in the measuring tube and propagate therein in a guided manner in the axial extension direction in a combined waveguide comprising the measuring tube and the fluid, and the ultrasonic sensor receives the guided ultrasonic waves and determines the flow velocity of the fluid by evaluation. Advantageous excitation of the guided ultrasonic waves is achieved in that the ultrasonic actuator has a plurality of excitation structures in the axial extension direction, which are axially spaced apart from one another, by means of which ultrasonic waves are fed into the measuring tube, and in that the wave pattern of at least one predetermined wave pattern of the guided ultrasonic waves is excited in the measuring tube in a spatially distributed manner in the axial direction.

The invention relates to a display system for the spatial representation of content in a vehicle, comprising one or more particles (1) and an ultrasonic actuator unit (3) for generating sound waves in the ultrasonic range, as well as a control unit for controlling the ultrasonic actuator unit (3), wherein the control unit is designed to control the ultrasonic actuator unit (3) according to a predetermined display content, so that the particles (1) reproduce the display content under the influence of the sound waves, characterized in that the display system has a sensor unit (5) for detecting a mood of an occupant of the vehicle, and the control unit is designed to adapt a display content depending on the detected mood.

The invention relates to a display system for the three-dimensional representation of contents in a vehicle, comprising one or more particles (1) and an ultrasonic actuator unit (3) for generating sound waves in the ultrasonic range, and a control unit for controlling the ultrasonic actuator unit (3), wherein the control unit is designed to control the ultrasonic actuator unit (3) according to a specified display content so that the particles (1) reproduce the display content under the influence of the sound waves, characterized in that the display system comprises a sensor unit (5) for identifying the mood of a passenger in the vehicle, and the control device is designed to adjust the display contents depending on the mood identified.

Methods and systems measuring structural parameters characterizing a measurement target based on changes in measurement signal values and estimated changes in electrical properties, optical properties, or both, of the measurement target due to variation of mechanical stress are presented herein. The electrical and optical properties of a measurement target are perturbed by inducing a mechanical wave within the measurement target under measurement. In preferred embodiments, the mechanical wave is excited by an ultrasonic actuator in contact with a back side of a wafer under measurement. Both the changes in the measurement signal values and estimated changes in the electrical, properties, optical properties, or both, of the measurement target are quantified and provided as input to a measurement model. In this manner, the measurement is based on the derivatives of measurement signals with respect to electrical properties, optical properties, or both.

To disclose an ultrasonic direct drive type amphibious mobile robot and a driving method for the same.SOLUTION: An ultrasonic direct drive type amphibious mobile robot includes an underwater ultrasonic actuator 1 provided at a rear end part of a cabin 5, and a land ultrasonic actuator 2 provided at a bottom end part of the cabin 5. The mobile robot excites vibration in a primary telescopic mode in a thickness direction of a third vibrator by applying a drive voltage to the third vibrator of the underwater ultrasonic actuator 1, generates ultrasonic waves having same frequency in water, generates interaction thrust by ultrasonic waves and water, drives underwater travel of the amphibious mobile robot, applies a drive voltage to a first piezoelectric ceramic sheet and a second piezoelectric ceramic sheet of the land ultrasonic actuator 2 when travelling on a land, thereby exciting each vibration in primary flexural mode of a first vibrator and a second vibrator, and driving the land travel of the amphibious mobile robot.SELECTED DRAWING: Figure 1

The invention relates to an angle adjustment device (1) comprising: an ultrasonic actuator (3) containing a resonator (2) in the form of a piezoelectric hollow cylinder (4) with at least one flat or conical end face (5) and friction elements (6) arranged thereon; an angle adjustment element (8) having a spherical friction surface (7) and pressed against the friction elements (6), which angle adjustment element is adjustable about each axis with respect to its angular position by the ultrasonic actuator (3);and an electrical excitation device (26), wherein the resonator (2) is divided into three equal segments (9) by three virtual diametrical half-planes (P1, P2, P3), and each of these segments (9) has an excitation electrode (10), a common electrode (11), and piezoelectric material (17) arranged between the excitation electrode (10) and the common electrode (11), forming a respective generator of an acoustic standing wave (12), wherein one of the friction elements (6) is arranged on at least one end face (5) of each of the segments (9), either between the segments (9) or in the central region of a segment (9). The invention further relates to a method for operating such an angle adjustment device.

The invention relates to an angle adjustment device (1) comprising: an ultrasonic actuator (3) containing a resonator (2) in the form of a piezoelectric hollow cylinder (4) with at least one flat or conical end face (5) and friction elements (6) arranged thereon; an angle adjustment element (8) having a spherical friction surface (7) and pressed against the friction elements (6), which angle adjustment element is adjustable about each axis with respect to its angular position by the ultrasonic actuator (3);and an electrical excitation device (26), wherein the resonator (2) is divided into three equal segments (9) by three virtual diametrical half-planes (P1, P2, P3), and each of these segments (9) has an excitation electrode (10), a common electrode (11), and piezoelectric material (17) arranged between the excitation electrode (10) and the common electrode (11), forming a respective generator of an acoustic standing wave (12), wherein one of the friction elements (6) is arranged on at least one end face (5) of each of the segments (9), either between the segments (9) or in the central region of a segment (9). The invention further relates to a method for operating such an angle adjustment device.

An ultrasonic flowmeter comprising a measuring tube, a first ultrasonic transducer, a second ultrasonic transducer, and a control and evaluation unit. The first ultrasonic transducer and the second ultrasonic transducer are arranged axially offset on the measuring tube. The first ultrasonic transducer is an ultrasonic actuator. The second ultrasonic transducer is an ultrasonic sensor. The control and evaluation unit controls the ultrasonic actuator in the operating state of the ultrasonic flowmeter such that a guided ultrasonic wave is excited in the measuring tube through which a fluid flows. The guided ultrasonic wave propagates in a combined waveguide in an axial direction the measuring tube and the fluid. The ultrasonic sensor receives the guided ultrasonic wave and the control and evaluation unit determines a flow velocity of the fluid by evaluating the received guided ultrasonic wave.

An ultrasonic tonometer includes an ultrasonic actuator having an ultrasonic element and configured to irradiate the subject eye with ultrasound generated by the ultrasonic element. The ultrasonic actuator includes: a sonotrode propagating ultrasound generated by the ultrasonic element into air; a flexural vibration portion disposed on a distal side of the sonotrode in an axial direction of the ultrasonic actuator; and a reflecting portion covering, with a gap with the flexural vibration portion, at least a part of the flexural vibration portion in a circumferential direction.

The application provides an atomization chip and a preparation method thereof. The atomization chip comprises: a substrate comprising a single crystal silicon layer and an insulating layer; a first electrode located on the surface of the substrate; a piezoelectric film layer located on the surface of the first electrode; a second electrode located on the surface of the piezoelectric film layer; a polysilicon layer located on the surface of the second electrode, and the first electrode, the piezoelectric film layer, the second electrode and the polysilicon layer form a piezoelectric ultrasonic actuator, or the first electrode, the second electrode, the single crystal silicon layer, the polysilicon layer and a capacitor gap form a capacitive ultrasonic actuator, and the frequency of the ultrasonic actuator is adjusted through the thickness of the polysilicon layer; a heater located on the surface of the substrate or the surface of the ultrasonic actuator, and the heater is provided with heater electrodes at both ends; and a liquid channel arranged in an array on the surface of the atomization chip. The above technical scheme combines ultrasonic atomization and heating atomization, reduces the ultrasonic atomization frequency to reduce power consumption, and reduces the heating temperature to avoid high-temperature hazards.

The application discloses a kind of based on reinforcement learning and fuzzy control's ultrasonic actuator pump lung control method, it is related to extracorporeal membrane oxygenation field, including the following steps: according to expert system knowledge, construct the fuzzy rule between basic vital signs and pulsation frequency, obtain fuzzy controller, adjust average flow;According to the flow field condition of oxygenation device, construct the interactive environment of agent;The state space and action space of agent control strategy are constructed, and the movement of motor is kept stable;Establish and train the blood pump control strategy model based on deep reinforcement learning, obtain blood flow waveform curve and blood pump control strategy;Intelligent control is carried out to motor by extracting trained model, and the control performance of strategy model is evaluated.The application finds optimal flow waveform using deep reinforcement learning, regulates and controls blood flow field, significantly improves oxygenation efficiency without complex oxygenator design conditions, and different agents can be obtained according to different oxygenator structures, with strong portability.