Abstract:
An apparatus, system, and method for a Gigasonic Brush for cleaning surfaces is presented. One embodiment of the system includes an array of acoustic transducers coupled to a substrate where the individual acoustic transducers have sizes in the range of 9 um2 to 250,000 um2. The system may include a positioning mechanism coupled to at least one of a target surface or the array of acoustic transducers, and configured to position the array of acoustic transducers within 1 millimeter of a target surface. The system may also include a cleaning liquid supply arranged to provide cleaning liquid for coupling the array of acoustic transducers to the target surface. The system may further include a controller coupled to the array of acoustic transducers and configured to activate the array of acoustic transducers.
Abstract:
The invention provides a controller (1) for a high-frequency agitation source, the controller comprising signal generation means (3) for generating a drive signal (53) having a variable duty cycle. The drive signal (53) is used to drive the high-frequency agitation source (2). The controller further comprises temperature detecting means (7) for detecting a temperature of the high-frequency agitation source (2). Further, the controller (1) is adapted and arranged to vary the duty cycle of the drive signal (53) in response to the temperature of the high-frequency agitation source (2). By varying the duty cycle of the drive signal (53), the average power supplied to the piezoelectric crystal (2) can be varied whilst still maintaining a fixed amplitude of oscillation. This allows the temperature of a high-frequency agitator, for example a piezoelectric crystal, to be controlled.
Abstract:
An electronic drive system for a droplet spray generation device (11) of the type having a droplet generator including a perforate membrane driven by a piezoelectric transducer, the electronic drive system comprising: a programmable micro-controller (20) providing a power supply (21) for converting, in use, a battery (12) supply voltage to power the device, a power amplifier (23) connected to receive electric power from the power supply (21) and supply a drive signal to the piezoelectric generator at regular intervals; a mono-stable switch connected to a timer to generate the drive signal as a plurality of pulses of fixed interval over a predetermined period when the switch is operated.
Abstract:
An annunciator capable of annunciating by means of both sound and vibration, which is provided with an annunciating unit (2) equipped with a first vibrating body which generates acoustic waves when the body is driven at an audible frequency by means of a first actuating signal and a second vibrating body which generates bodily sensible vibrations when the body is driven at a low frequency of several 100 Hz or lower by means of a second actuating signal and connected to an annunciating signal generating circuit (5) through a switch (59). The annunciating signal generating circuit (5) is equipped with a signal generating circuit (57) for sound which generates the intermittent first actuating signal that is repeatedly turned on and off at regular time intervals, a signal generating circuit (58) for vibration which generates the intermittent second actuating signal that is repeatedly turned on and off at regular time intervals, and a synchronous circuit (56) which shifts the turning-on periods of the first and second driving signals generated from the circuits (57) and (58) from each other. This constitution can prevent the abrupt increase of the power consumption of the annunciator.
Abstract:
A control system for a probe, including a transmission member, comprises a power source for supplying a constant power to a transmission member and a transducer for coupling the constant power to the transmission member and for providing a mechanical output to the transmission member at a frequency. A frequency measuring device is also provided for constantly measuring the frequency of the mechanical output of the transducer. A current monitoring device for measuring current forwarded to the transducer which monitors the current while the frequency of said mechanical output is varied until it is determined at what frequency the current is at a maximum is also provided. A method for implementing this apparatus is also provided.
Abstract:
A method for determining the voltage current phase relationship of a piezoelectric phacoemulsification handpiece includes the steps of obtaining an AC voltage signal corresponding to the operating AC voltage of a piezoelectric handpiece and obtaining an AC current signal corresponding to the operating AC current of the piezoelectric handpiece. From said AC current signal, onset of a current cycle is determined and after onset of the current cycle, a voltage (VI) corresponding to a time necessary for the AC current signal to reach a maximum value is produced. Also, after onset of the current cycles, a voltage (Vv) corresponding to a time necessary for the AC voltage signal to reach a maximum value is produced. Using an A/D converter, a digital output (Dv) corresponding to (Vv) is produced and a digital output (DI) corresponding to (VI) is produced. Comparing (Dv) and (DI) determines the phase relationship between the voltage and current of the piezoelectric phacoemulsification handpiece.
Abstract:
A system for processing biological or other samples includes an array of transducer elements that are positioned to align with sample wells in a microplate. Each transducer element produces ultrasound energy that is focused towards a well of the microplate with sufficient acoustic pressure to cause inertial cavitation. In one embodiment, the transducers are configured to direct ultrasound energy into cylindrical wells. In other embodiments, the transducer elements are configured to direct ultrasound energy into non-cylindrical wells of a microplate.
Abstract:
Delay line memory device, systems and methods are disclosed. In one aspect, a delay line memory device includes a substrate; an electronic unit disposed on the substrate and operable to receive, amplify, and/or synchronize data signals into a bit stream to be transmitted as acoustic pulses carrying data stored in the delay line memory device; a first and a second piezoelectric transducer disposed on the substrate and in communication with the electronic unit, in which the first piezoelectric transducer is operable to transmit the data signals to the acoustic pulses that carry the data through the bulk of the substrate, and the second piezoelectric transducer is operable to transduce the received acoustic pulses to intermediate electrical signals containing the data, which are transferred to the electronic unit via an electrical interconnect to cause refresh of the data in the delay line memory device.
Abstract:
Техническое решение относится к устройствам для создания механических колебаний, и может быть использовано в промышленности, на транспорте и в быту в установках ультразвуковой сварки и мойки, эхолокации, а также в шаговых пьезоэлектрических двигателях. Устройство содержит жесткие втулки (1), (2), по меньшей мере один осевой пьезопакет (3), причем воображаемая ось (6) пьезопакета (3) совпадает с направлением механических колебаний. Также пьезопакет (3) ограничен жесткими втулками (1), (2), при этом начальная жесткая втулка (1) и конечная жесткая втулка (2) соединены средством (7), обеспечивающим их притягивание друг к другу в направлении воображаемой оси (6) пьезопакета (3). В жестких втулках (1), (2) и в пьезопакете (3) выполнен общий внутренний канал (8). Также в жестких втулках (1), (2) выполнены по меньшей мере два соединительных прохода (9), (10), сообщающие внутренний канал (8) с наружным пространством. В отличие от ближайшего аналога, в каждом соединительном проходе (9), (10) жестких втулок содержится один клапан. При этом по меньшей мере один клапан является впускным клапаном (11), по меньшей мере один клапан является выпускным клапаном (12). Задача, на решение которой направлено техническое решение, состоит в упрощении конструкции устройства. Положительный эффект, достигаемый при реализации изобретения, заключается в уменьшении массы и объема устройства.
Abstract:
An acoustic transmitter for transmitting an acoustic signal through a downhole medium includes a voltage source; a composite load; and switching circuitry that applies voltage from the voltage source across the composite load in response to a drive signal. The composite load includes charge control circuitry, in the form of at least one inductor, connected electrically in series with a piezoelectric transducer that may be electrically modeled as a capacitor.