A device and a method for generating percussive pulses or vibrations for a construction machine, in which a piston is reversibly reciprocated in a working space in a housing between a first reversal point and a second reversal point, wherein, for the purpose of generating the percussive pulses or vibrations, the piston is set into a reversible movement by means of a pressure fluid and the said pressure fluid is led into and out of the working space in the region of the first reversal point and the second reversal point. The position of the piston is detected by way of a measuring means, in that depending on the detected position of the piston a control unit controls at least one controllable valve, through which pressure fluid is led into and/or out of the working space, wherein by the control unit the movement of the piston is controlled.

An ultrasonic touch sensor includes a touch structure configured to receive a touch; a transmitter arrangement configured to transmit one or more ultrasonic transmit waves toward the touch structure; a receiver arrangement configured to receive ultrasonic reflected waves produced by reflections of the one or more ultrasonic transmit waves and generate a plurality of measurement signals representative of the ultrasonic reflected waves; and a measurement circuit configured to measure a degree of variation of a plurality of measurement signals, compare the degree of variation with a detection threshold, and determine whether a no-touch event or a touch event has occurred at the touch structure based on whether the degree of variation satisfies the detection threshold.

Described herein are methods and systems for testing transducers and associated integrated circuits. In some cases, a method or system described herein can comprise modulating a bias voltage using a test signal in order to produce a modulated bias voltage signal useful in testing a plurality of transducers of a transducer array in parallel.

An ultrasound transducer array is provided that comprises a plurality of CMUT (capacitive micromachined ultrasound transducer) cells (100), each CMUT cell comprising a substrate (300) carrying a first electrode (110) of a first electrode arrangement, the substrate being spatially separated from a flexible membrane including a second electrode (120) of a second electrode arrangement by a gap (130), at least one of the first electrode and the second electrode being electrically insulated from said gap by at least one dielectric layer (311, 313), wherein at least one of the first electrode arrangement and the second electrode arrangement is partitioned into a plurality of sections interconnected by respective fuse portions (112, 122). An ultrasound probe and an ultrasound system comprising such an ultrasound transducer array are also disclosed.

Control consoles and methods for supplying a drive signal to a surgical tool are provided. The control console comprises a transformer with primary and secondary windings. The primary winding receives an input signal from a power source and induces the drive signal in the secondary winding to supply the drive signal to the surgical tool. A first current source comprising a leakage control winding is coupled to a path of the drive signal. The primary winding induces a first cancellation current in the leakage control winding to inject into the path of the drive signal to cancel leakage current. A sensor coupled to the path of the drive signal outputs a sensed signal to provide feedback related to leakage current. The sensor may connect to a second leakage current cancellation source and/or a fault detection stage. The power source may be variable and may also energize the second current source.

The present invention relates to a method and a device for controlling an ultrasound tool unit for machining a workpiece on a machine tool. For this, a plurality of parameter sets are stored on a storage device of a control device of the machine tool. When controlling an ultrasound transducer of the ultrasound tool unit received on a work spindle of the machine tool on the basis of a sensor signal input into a controller by means of a generator operated by the controller, on the basis of a first parameter set, which is associated with the ultrasound tool unit and sets the operation of the controller, an operating setting of the controller is switched by changing the first parameter set setting the operation of the controller on the basis of a second parameter set, which is associated with the ultrasound tool unit, of the plurality of parameter sets stored on the storage device.

Systems and methods are provided for thermally conductive shock absorbers for medical imaging probes. An example medical imaging probe may have, at least, a transducer disposed underneath a contact surface of the medical imaging probe, with the transducer configured to transmit and receive signals based on a medical imaging technique; a support structure disposed underneath the transducer; and a thermally conductive shock absorber (TCSA) layer disposed between the transducer and the support structure, with the thermally conductive shock absorber (TCSA) layer is configured to facilitate both of thermal transfer in a direction from the contact surface into the support structure, and absorbing at least a portion of impact force applied to at least the contact surface. The support structure may include a heat sink.

An aerosol separating module includes an ultrasonic vibrator configured to generate a ultrasonic wave, a surface acoustic wave vibrator configured to generate a surface acoustic wave, and a transfer element configured to transfer an aerosol forming substrate to at least one of the ultrasonic vibrator or the surface acoustic wave vibrator.

In order to reduce crosstalk between analog and digital signals, a circuit device includes a vibrator element, a semiconductor device, and a package. In the semiconductor device, an analog pad is provided along a first side facing in a first direction when the semiconductor device is seen in plan view. In addition, a digital pad is provided along aside facing in a second direction opposite to the first direction, that is, a second side facing the first side. In the package, an analog terminal which is connected to the analog pad is provided on a first side of the package facing in the first direction. In addition, a digital terminal which is connected to the digital pad is provided on a second side of the package facing in the second direction.

A method for testing the integrity of a stack during ultrasonic welding, includes the steps of: (i) ultrasonically welding two or more work pieces with a stack, the stack including a convertor and a horn; (ii) measuring a frequency profile based on a vibration of the horn during the welding step; and (iii) comparing the measured frequency profile to a standard frequency profile to obtain an error rate, the error rate being indicative of a difference between the measured frequency profile and the standard frequency profile. A system employing the aforementioned method is also provided.