8 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.

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).

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 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.

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.