| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 367153000 |
Plural transducer array
| 30 |
| 367157000 |
Piezoelectric
| 25 |
| 367142000 |
Exclusive-type transmitter
| 24 |
| 367173000 |
Transducer with support
| 20 |
| 367149000 |
Exclusive-type receiver
| 12 |
| 367176000 |
Transducer with resonant or damping structure | 3 |
| 20090116341 | Hybrid-drive multi-mode pipe projector - A hybrid drive (HD) multi-mode pipe projector (MMPP) for use in underwater acoustic applications is provided. The HD MMPP is formed with an inner magnetostrictive drive motor nested within an outer drive motor. The inner motor is surrounded by a magnetic field generating coil winding. Preferably the inner drive motor is a Terfenol-D motor and the outer drive motor is a radially-poled piezoceramic drive motor. This nested configuration provides increased bandwidth and low-frequency extension to the MMPP design. | 05-07-2009 |
| 20100238766 | SONAR BAFFLES AND BACKINGS - Improved sonar baffles and backings are disclosed. The sonar baffles and backings include a porous polymer. The baffles and backings can be produced by partial selective sintering of a polyamide powder. Baffles and backings in accordance with exemplary embodiments exhibit advantageous acoustic properties, and can be manufactured to complex geometric specifications without difficulty. | 09-23-2010 |
| 20140198622 | HYDRODYNAMIC MODULATOR - A hydraulic modulator provides a rectangular outlet from which water can be discharged across an outlet mouth. Spaced from the rectangular outlet across the outlet mouth is a rigid blade. Because water is effectively incompressible at the frequencies of interest a compliance chamber is provided along an interior side of the rigid blade. Mechanical compliance elements are provided within or adjacent to the compliance chamber which may be displaced to absorb and discharge mechanical energy from the flow of water. Water flow shifts back and forth relative to the interior and exterior sides of the rigid blade. | 07-17-2014 |
| 367171000 |
Liquid filled transducer | 2 |
| 20130294204 | Silicon-Based Monolithic Integrated Sonar Array - The invention discloses a silicon-based monolithic integrated sonar array which includes a cantilevered sensing array structure, a sound-transparent jacket, and a support structure. The cantilevered sensing array structure is fixed on the support structure and in the sound-transparent jacket, wherein the sound-transparent jacket is filled with insulating dielectric oil, and the cantilevered sensing array structure is immersed in the insulating dielectric oil. The sound-transparent jacket is sealed and is treated with water tightness processing. The array can be applied, into devices for underwater ultrasonic imaging, ultrasonic ranging, torpedo navigating, etc. | 11-07-2013 |
| 20140036635 | ALL-OPTICAL HYDROPHONE INSENSITIVE TO TEMPERATURE AND TO STATIC PRESSURE - The invention consists of an optical hydrophone, an optical fiber element forming a laser cavity, housed in a mechanical structure which comprises an open cylindrical rigid body, defining the cavity enclosing a fluid and in which the optical fiber element is housed, and closed at its ends by two end caps which keep the optical fiber element permanently under tension, in a longitudinal rectilinear position inside the cavity. The end caps are configured in such a way that when the exterior pressure varies, they undergo a deformation giving rise to a variation in the length of the optical fiber element and that when the temperature varies, they undergo a deformation giving rise to a variation in the length of the optical fiber element which compensates for that induced on this element by the temperature variation. The mechanical structure furthermore exhibits one or more orifices allowing equilibration of the static pressures. | 02-06-2014 |
| 367172000 |
Transducer with pressure compensating means | 2 |
| 20090245028 | ULTRA LOW FREQUENCY ACOUSTIC VECTOR SENSOR - An acoustic vector sensor mounted in a housing is provided for measuring ultra low frequency acoustic wave particle velocities in a liquid, comprising a horn for amplifying the acoustic wave particle velocities, and a neutrally buoyant object supported in a liquid contained in the horn. The neutrally buoyant object, in reacting to the amplified acoustic wave particle velocities, produces displacements that are sensitively measured. | 10-01-2009 |
| 20150085618 | HYDROPHONE HOUSING - The invention relates to a hydrophone housing. The housing comprises an outer casing with an exterior shape being in close contact with sediment when buried therein and having a deflectable wall part. Solid material partly fills the casing to define an outer chamber behind the deflectable wall part, a cavity shaped so that an inner chamber is defined immediately surrounding a hydrophone sensing element held therein, and a first duct for liquid flow communication between the outer chamber and the cavity or an internal volume of the hydrophone sensing element. Thereby, a hydraulic coupling is provided so that an acoustic pressure causing small radial displacements of outer surface of the housing will, via liquid in the first duct, cause large radial displacements of the hydrophone sensitive element. The area of the deflectable wall part is much larger than the area of the sensitive element so that only small displacements of the housing are required to cause large displacements at the hydrophone sensing element. | 03-26-2015 |
| 367174000 |
Transducer with diaphragm | 2 |
| 20120113758 | DIAPHRAGM AND PROCESS FOR PRODUCING A DIAPHRAGM FOR AN ULTRASONIC TRANSDUCER - The invention relates to a diaphragm ( | 05-10-2012 |
| 20140269211 | FLEXURAL DISK TRANSDUCER SHELL - A flexural disk transducer is located in a shell or enclosure primarily for underwater use. Compression chambers adjacent to the transducer capture sound from bands on the disk and waveguides are used to direct the sound forward along a single propagation axis. An acoustic delay line is built into one waveguide to compensate for phase differences between the bands. | 09-18-2014 |
| 367150000 |
With modifying lens | 2 |
| 20100290318 | SYSTEM FOR VARIABLY REFRACTING ULTRASOUND AND/OR LIGHT - The disclosure is directed to a system for variably refracting, and is transparent for, ultrasound as well as for light. By choosing liquids with the right optical and acoustical properties, it is possible to variably refract (including focusing and deflecting or steering) ultrasound while not affecting the refraction of light, or vice versa. Two lenses in series, or preferably one lens, allow for variably refracting ultrasound and light. | 11-18-2010 |
| 20130208570 | ACOUSTIC LENS - A subsea sonar unit includes an acoustic transducer. The acoustic transducer transmitting an acoustic beam defining an acoustic propagation path for acoustic signals to or from the transducer, and the unit also includes a housing at least a part of which being oil filled and positioned in the propagation path of the beam. The housing is acoustically transparent in the direction of the acoustical beam and has an outer surface with a known shape in the propagation path. The unit also includes a corrective lens, the corrective lens being mounted in the propagation path between the transducer and the housing part the interface between which defining a first surface having a shape relative to the cross section of the acoustic beam in the propagation path essentially corresponding to the shape of the housing surface relative to the beams cross section at the housing surface in the propagation path. | 08-15-2013 |
| 367152000 |
With impedance matching means | 2 |
| 20110032801 | UNDERWATER DETECTION DEVICE - This disclosure provides a detection device, which includes a transceiving module for periodically transmitting a detection pulse signal toward a space and receiving a reflection wave from a target object as a reception signal, a signal loading module for generating a distance section row by dividing a given detection distance range into a plurality of distance sections, obtaining reception data by sequentially sampling the reception signal for every distance section, and storing the reception signal in a memory, and an interference processing module for sequentially performing interference removal processing for the reception data of each of the distance sections stored in the memory. The interference processing module includes an interference wave determination module for determining for every distance section whether the reception data of the distance section row including a target distance section is resulting from an interference wave, a signal generating module, if the reception data is determined to be resulting from the interference wave for generating data to be displayed based on one or more reception data other than the reception data in proximity to the reception data at least either in a distance direction or a transmission cycle direction, and if the reception data is determined to be resulting from the reflection wave, for using the reception data as the data to be displayed, and a display module for displaying the data to be displayed. | 02-10-2011 |
| 20130322216 | ULTRASONIC TRANSDUCER FOR PARAMETRIC ARRAY - An ultrasonic transducer having a reduced cost of manufacture. The ultrasonic transducer includes a first insulative retaining layer, a second insulative retaining layer, and a vibrator film layer sandwiched between the first and second retaining layers. The first retaining layer includes a first plurality of apertures formed therethrough, and the second retaining layer includes a second plurality of apertures formed therethrough, in which the second apertures are substantially in registration with the first apertures. The ultrasonic transducer further includes a first cover portion having a plurality of spring/backplate assemblies connected thereto, and a second cover portion. The combination of the first retaining layer, the vibrator film layer, and the second retaining layer is sandwiched between the first and second cover portions of the ultrasonic transducer. The laminated construction of the ultrasonic transducer allows the formation of an array of ultrasonic film transducers using a single piece of ultrasonic vibrator film. | 12-05-2013 |
| 367151000 |
With reflector | 2 |
| 20080316866 | Lightweight acoustic array - An acoustic transducer array and method of baffle construction is presented to provide an improved array for use in underwater installations. The array is presented wherein a significant majority of the acoustic energy receiving surface is formed by lightweight acoustic baffling material while still maintaining a fully functional, fully populated array. The acoustic baffle constructed is incompressible and suitable for deep water operation while demonstrating both improved acoustic performance and positive buoyancy when necessary. In addition, the invention eliminates the non-uniform element to element spacing that occurs between sub-panels in similar arrays. | 12-25-2008 |
| 20100271907 | Electroacoustic Underwater Antenna - In the case of an electroacoustic underwater antenna, which has a reflector ( | 10-28-2010 |
| 367168000 |
Magnetostrictive | 1 |
| 20090279391 | APPARATUS FOR MEASURING PRESSURE IN A VESSEL USING MAGNETOSTRICTIVE ACOUSTIC TRANSDUCER - The present invention relates to an apparatus for measuring pressure inside a vessel using a magnetostrictive acoustic transducer. The apparatus includes a magnetostrictive acoustic transducer, including an exciting coil unit wound on a first magnetization yoke disposed on an outer position of a vessel, a receiving coil unit wound on the first magnetization yoke, and a vibration unit disposed on an inner position of the vessel in which the first magnetization yoke is installed; a control unit for supplying a predetermined excitation current signal to the exciting coil unit; and a pressure measuring unit for measuring an internal pressure of the vessel based on an ultrasonic wave signal received by the receiving coil unit and an excitation current signal into the exciting coil unit. | 11-12-2009 |
| 367169000 |
Elongated continuous type | 1 |
| 20100008191 | ACOUSTIC PROJECTOR HAVING MINIMIZED MECHANICAL STRESSES - An acoustic projector which includes an outer shell formed of a reinforced epoxy resin having a longitudinal slot has an inner reinforcing liner formed of metal to reduce mechanical stress. The liner extends throughout the length of the outer shell and has a longitudinal slot aligned with the slot formed in the shell. An arcuate shaped driver is mounted along a portion of the I.D. of the metal liner and separated therefrom by insulation. In an alternate embodiment, the outer shell is formed of a plurality of overlapping layers of epoxy/graphite strips extending at various angles to increase the Z-axis stiffness. | 01-14-2010 |
| Entries |
| Document | Title | Date |
|---|
| 20080298177 | SUBMERSIBLE LOUDSPEAKER ASSEMBLY - A submersible loudspeaker assembly is provided. The loudspeaker assembly includes: a housing; a loudspeaker enclosed within the housing; an external diaphragm disposed adjacent to the loudspeaker. The external diaphragm is acoustically transparent when subject to ambient air pressure, but configured to flex towards the loudspeaker when submerged in water. | 12-04-2008 |
| 20100039900 | Volumetric displacement transducer for an underwater acoustic source - A volumetric displacement transducer is provided for generating acoustic signals. The transducer housing incorporates at least one pair of opposed plates mounted for radial vibration. A driving mechanism is coupled to the opposed plates for driving the plates simultaneously in opposition to each other at a desired frequency, whereby an acoustic signal is radiated into a medium, such as water, surrounding the housing. | 02-18-2010 |
| 20100329083 | SUBMARINE ANTENNA - The invention relates to a submarine antenna to be attached to the hull of a submarine, said antenna comprising a planar converter arrangement ( | 12-30-2010 |
| 20110188350 | SYSTEM AND METHOD FOR DEPTH DETERMINATION OF AN IMPULSE ACOUSTIC SOURCE - A system and method for making an accurate estimate of the activation depth for an impulse acoustic source includes recording sounds produced by the activation of the underwater impulse acoustic source over a time period sufficient to capture reverberation, performing a cepstral scan of the recording to determine a quefrequency corresponding to the impulse from the underwater impulse acoustic source and deriving a depth estimate from the quefrequency corresponding to the impulse from the underwater impulse acoustic source. | 08-04-2011 |
| 20110305115 | UNDERWATER WIRELESS SENSOR - An underwater wireless sensor is provided. The underwater wireless sensor comprises a floating-diving device enabling the underwater wireless sensor to dive to a first predetermined water depth in response to a predetermined condition; a sensing device converting a plurality of environmental parameters into a plurality of environmental messages; a micro controller receiving the environmental messages and sending a command signal including the environmental messages; and a communication device receiving the command signal, sending the command signal via a wireless sensor network, receiving an external message including a second predetermined water depth, and sending the external message to the micro controller so that the micro controller performs a corresponding operation and sends out a control signal to enable the underwater wireless sensor to move to the second predetermined water depth. | 12-15-2011 |
| 20120113755 | Inter-diver signaling device and process - Taps on a beam-interrupt button of an underwater signaling transceiver are encoded as binary frequency shift-key modulated Golay codes, which are transmitted via 56-58 kHz compression waves generated by a ring-shaped electromechanical transducer. Light emitting diodes flash to signal the content of received signals and provide monitoring of the distance between divers. All components of the transceiver—except outer portions of input/output leads and a suction cup for attaching to the transceiver to a diver's mask—are completely encased in transparent plastic. The input/output leads allow an internal battery to be recharged, provide access to the internal processor for programming and data retrieval, and monitor whether the transceiver is submerged so that the transceiver can operate in an underwater mode or an above-water mode. Transceivers only communicate with other transceivers which use the same communication channel. Transceivers monitor their separation distances and flash a warning signal when nearing an out-of-range condition. | 05-10-2012 |
| 20120320713 | ULTRASONIC TRANSDUCER FOR USE IN A FLUID MEDIUM - An ultrasonic transducer for use in a fluid medium includes at least one housing having at least one inner space, at least one transducer core accommodated in the inner space, having at least one electroacoustic transducer element. The housing has at least one opening facing the fluid medium. The opening is covered at least partially by at least one sealing foil. An edge of the sealing foil is sealed by at least one sealing material. | 12-20-2012 |
| 20130100777 | SOURCE FOR MARINE SEISMIC ACQUISITION AND METHOD - Method, source and seismic vibro-acoustic source element configured to generate acoustic waves under water. The seismic vibro-acoustic source element includes an enclosure having first and second openings; first and second pistons configured to close the first and second openings; an actuator system provided inside the enclosure and configured to actuate the first and second pistons to generate a wave having first frequency; and a pressure mechanism attached to the enclosure and configured to control a pressure of a fluid inside the enclosure such that a pressure of the fluid is substantially equal to an ambient pressure of the enclosure. | 04-25-2013 |
| 20180024240 | UNDERWATER DETECTION APPARATUS | 01-25-2018 |
