Abstract:
A hydrosound marine anti-fouling system with a microcontroller monitoring and modifying, as desired, hydrosound pulse rate, output frequencies and volume level. This allows hydrosound pulse rate, output frequency and volume to be adjusted to levels determined to be effective with local marine growth. By adding a sensor to monitor hydrosound pulse rate, output frequencies and volume, an automatic testing process can be instituted at timed intervals and monitored by the microcontroller to confirm the hydrosound marine anti-fouling system is fully functioning.
Abstract:
Изобретение относится к ультразвуковой ударной обработке деталей, расположенных под водой. Инструмент содержит корпус, в котором установлен герметичный стакан из немагнитного материала, выполненный с возможностью движения вдоль корпуса, головку с ударными элементами, размещенную на торце стакана, ультразвуковой вибрационный привод и датчик положения стакана относительно корпуса. Ультразвуковой вибрационный привод образован пьезоэлектрическим преобразователем с частотопонижающими накладками. Одна из накладок выполнена за одно целое с трансформатором колебательной скорости, имеет входной и выходной рабочие торцы. Выходной рабочий торец накладки взаимодействует с ударными элементами. В трансформаторе колебательной скорости выполнены отверстия, герметизированные относительно внутренней полости стакана и соединенные между собой в области его выходного торца с возможностью затекания в них воды. Датчик положения стакана выполнен из трех постоянных магнитов. Один из магнитов установлен с возможностью взаимодействия с упругим элементом переключателя датчика, а два других - размещены в корпусе.
Abstract:
A system for producing sound waves in a medium, the system comprising: at least two first free-flooded ring transducers (100) centred about a first axis, the first free-flooded ring transducers (100) being substantially cylindrical and having an axial gap of height g therebetween such that they form a first column; and at least one cylindrical body (500a, 500b) centred about the first axis nested in the first column, such that the cylindrical body is aligned with the axial gap. The cylindrical body may be a tweeter free-flooded ring transducer. This provides for improved wideband performance in a free flooded ring array.
Abstract:
A longitudinal vibrator assembly comprising at least one piezoceramic, magnetostrictive or electrostrictive transducer (130) having a coaxial housing (200a, 200b or 200c) comprised of at least one slotted or complete cylindrical flexural member vibrating in a circumferential or radial direction and excited by a solid state transduction material.
Abstract:
A sound source for acoustic communication, navigation, and networking of an underwater glider may include a cylindrical body, a rigid front section disposed anteriorly to the cylindrical body, a plurality of metal rods, a resonant pipe surrounding the rods, and a rod-mounted piezo-ceramic transducer disposed between the body and the front section. Each rod may be attached at a first end to an anterior portion of the body and at a second end to a posterior portion of the front section. The pipe may be disposed between the body and the front section. The transducer may be disposed within the pipe. A posterior end of the pipe may be separated from the anterior portion of the body by a first orifice, and an anterior end of the pipe may be separated from the posterior portion of the front section by a second orifice.
Abstract:
Transducers and processes of forming the transducers are described. The transducers are produced as a monolithic body of a ceramic material and electrodes embedded in and encased by the ceramic material, with the ceramic material and the electrodes being co-fired to produce the monolithic body. By embedding the electrodes in the ceramic material, the ceramic material protects the electrodes and isolates the electrodes from the environment, eliminating or reducing the need for separate sealing or potting material to isolate the electrodes from the surrounding environment. In addition, unique transducer designs can be produced, and the electrodes can have configurations and can be located in the transducer in locations that are not possible with traditional transducer production techniques.
Abstract:
An apparatus and method associated with amplifying piezoelectric sonic and ultrasonic outputs is presented which provides high power output from piezoelectric devices, especially at high ultrasonic frequencies, in open air, which mitigates or eliminates overheating of the piezoelectric devices when stimulated at or near their peak outputs for extended periods. In addition, the invention provides a means of amplifying a piezoelectric sonic and ultrasonic device if a desired output power exceeds a normal maximum capability of the piezoelectric device.
Abstract:
In part, the invention relates to an immersible ultrasound probe having a substantially cylindrical shape and a circular or elliptical cross-section. Typically, the circumference of the probe and the length of the cylinder define an inner surface upon which rows and/or columns of transducer are disposed. This surface can also be formed from panels or modules. The transducers can be formed in unitary substrate and electrical connected to a MEMs device and a multiplexer. The inner surface defines a cavity having at least one opening sized to receive a body object. The inner surface configured to receive acoustic signals while immersed in a fluid.
Abstract:
A substrate including a surface on which is provided a modifying layer which is incomplete and has a distribution such as to provide a plurality of islands of said material and/or islands of substrate surface whereby the surface exhibits a modified electrical and/or magnetic property.