A method for producing a micro-electromechanical oscillatory system. A carrier substrate with a first surface is provided and a first passivation layer is applied onto the first surface. A first polysilicon layer grows on top of the first passivation layer and/or the first surface of the carrier substrate and a second passivation layer is applied onto a second surface of the first polysilicon layer. A second polysilicon layer grows on top of the first polysilicon layer and/or the second passivation layer. A transducer element is applied onto a third surface of the second polysilicon layer. A first trench is produced through the carrier substrate and the first polysilicon layer in the direction of the transducer element. The first trench extends as far as the second passivation layer, such that an oscillatable transducer plate of the micro-electromechanical oscillatory system is produced adjoining the first trench using the second polysilicon layer.

Described herein is an apparatus, comprising a substrate having a top surface and a bottom surface. In an embodiment, the apparatus comprises one or more piezoelectric transducers having a diameter of about 10 mm and a thickness of about 2 mm, embedded in the substrate. In an embodiment, the apparatus comprises one or more cavitation chambers having a depth of about 1 mm, each of the one or more cavitation chambers disposed between respective ones of the one or more piezoelectric transducers and the top surface of the substrate, wherein the one or more piezoelectric transducers generate vibrations within a frequency range about 20 kHz to about 1 MHz in the cavitation chambers that cause a substance stored in the cavitation chambers to be forcibly moved through the top surface of the substrate.

An ultrasonic inspection system includes an ultrasonic sensor and a control device. The ultrasonic sensor has a piezoelectric element that transmits and receives ultrasonic waves and plate portions and that are arranged so as to contact an upper surface of the piezoelectric element and have different thicknesses. The control device acquires a propagation time of a reflected wave reflected on an upper surface of the plate portion, calculates a sound velocity of the plate portion using the propagation time of the reflected wave and a thickness of the plate portion, and corrects a sound velocity of a pipe and acquires a sound velocity of the plate portion based on the calculated sound velocity. In addition, the control device acquires a propagation time of a reflected wave reflected on an upper surface of the plate portion, and calibrates a time axis based on the propagation time of the reflected wave, a thickness of the plate portion, and the sound velocity of the plate portion.

A miniature rangefinder includes a housing, a micromachined ultrasonic transducer, and signal processing circuitry. The housing includes a substrate and a lid. The housing has one or more apertures and the micromachined ultrasonic transducer is mounted over an aperture. The micromachined ultrasonic transducer may function as both a transmitter and a receiver. An integrated circuit is configured to drive the transducer to transmit an acoustic signal, detect a return signal, and determine a time of flight between emitting the acoustic signal and detecting the return signal.

The present disclosure provides an aerosol delivery device that may comprise a housing defining an outer wall and further including a power source and a control component. The device also includes a mouthpiece portion that defines an exit aerosol path, a tank portion that includes a reservoir configured to contain a liquid composition, and an atomization assembly configured to vaporize the liquid composition to generate an aerosol. The atomization assembly includes a mesh plate and a vibrating component, wherein the mesh plate and the vibrating component are configured to be separable from each other at a detachable interface. The detachable interface may be located at various locations of the device, including between the mouthpiece portion and the tank portion, within the mouthpiece portion, within the tank portion, within a separable atomization assembly, within a cartridge, within a control unit, or between a cartridge and a control unit.

A vibrator structure of an aerosol generating device is provided. The vibrator structure includes a vibrator configured to vibrate according to an electrical energy applied to the vibrator, the vibrator including a first surface and a second surface opposite to the first surface; a first electrode arranged on at least one region of the first surface; a second electrode arranged on at least one region of the second surface; and a metal body accommodating the vibrator and being in contact with at least one region of the first electrode, wherein the electrical energy applied from an external power source is transferred to the first electrode through the metal body.

A cartridge may include: a housing; a reservoir located in the housing and storing an aerosol generating material; an atomizer located in the housing and configured to generate vibration to atomize the aerosol generating material to an aerosol; a liquid delivery element configured to absorb the aerosol generating material stored in the reservoir and deliver the absorbed aerosol generating material to the atomizer; and a resistor located in the housing and configured to eliminate noise of a signal applied to the atomizer.

A system comprises a support, typically part of dishwashing machine or clothes washing machine, having a plurality of piezoelectric transducers. Each transducer can have a cylindrical housing with a water inlet along a side surface of the housing. The transducers can also comprise a lens and a piezoelectric material with electrodes configured to couple to a power supply.

The invention relates to a holding device for a lithotripsy device for fragmenting calculi, the holding device comprising a housing with a distal end and a proximal end and a sonotrode being connectable to the distal end, arranged within the housing there being an acceleration tube with a longitudinal center axis, a cavity, a proximal end, and a distal end, and with a movable projectile within the cavity for shock excitation of the sonotrode, a proximal-side abutment element arranged at the proximal end, and a distal-side abutment element arranged at the distal end of the acceleration tube, and the holding device being assignable a force generation apparatus for generating a force for moving the projectile back and/or forth between the proximal-side abutment element and the distal-side abutment element, and a vibration excitation apparatus for exciting vibrations of the sonotrode being arranged in the housing, wherein the holding device comprises a vibration compensation apparatus with at least one mass and at least one spring element such that the vibration compensation apparatus makes it possible to decouple the acceleration tube from the excitation of vibrations by means of the vibration excitation apparatus. The invention also relates to a lithotripsy device for fragmenting calculi.

An ultrasonic transducer and a method for producing an ultrasonic transducer are disclosed wherein the ultrasonic transducer has outstanding media resistance and a simpler construction by reducing the number of individual parts, so that the ultrasonic transducer can be produced in a fully-automated production process. The ultrasonic transducer, particularly for measurement of fluid volumes, can include a housing in which a contact element and a piezoceramic are arranged, wherein the piezoceramic includes two electrodes of differing polarity which are attached to different sides of the piezoceramic, wherein contact areas of the two electrodes for making electrical contact are disposed on a same side of the piezoceramic and the contact element includes at least two contact sections of differing polarity which are in electrically conducting contact with the contact areas of the two electrodes of corresponding polarity.