摘要:
A camera or an electronic apparatus according to the present invention has a waterproof function and comprises an outer casing for waterproofing the inside of main apparatus, a microphone and a speaker installed inside the main apparatus, openings used for sound input or sound output being featured in the outer casing at a position thereof corresponding to the microphone or the speaker, water proofing members each having a characteristic of passing air and blocking moisture and for sealing the opening from the inside, wherein the microphone or the speaker is mounted onto the water proofing member so as to let a space containing the microphone vibration plate or the speaker vibration plate communicate with only a part of space inside the main apparatus.
摘要:
A submersible, waterproof enclosure for a portable audio device is disclosed. Also disclosed is a removable lid allowing for the inserting and removing of the device from the enclosure. The disclosure further provides a connector system and an audio communication link connecting the housing to a device capable of generating sound, and to a device capable of producing sound while being submerged in an aquatic environment. Also disclosed are headsets containing at least one speaker within a waterproof enclosure. The speakers may be positioned in or near the ear canal, and attached to the ear or to the user's equipment. The headsets may further comprise devices for controlling power and fidelity. The disclosed invention provides an affordable, easy to use and flexible appliance for utilizing an audio device while being submerged into an aquatic environment.
摘要:
A pressure compensated hydrophone for measuring dynamic pressures is disclosed. The hydrophone includes a compliant hollow mandrel with a single optical fiber coiled around at least a portion of the mandrel. The mandrel further includes at least one pressure relief valve for compensating for changes in hydrostatic pressure. The pressure relief valve includes a micro-hole, which allows hydrostatic pressures or low frequency pressure events to couple into the interior of the mandrel to provide compensation against such pressure. Higher frequencies pressure events of interest do not couple through the micro-hole and therefore only act only on the exterior of the mandrel, allowing for their detection. Because (quasi) hydrostatic events are compensated for, the mandrel may be made particularly compliant, rendering the singular fiber optic coil particularly sensitive to the detection of the higher frequency signals of interest.
摘要:
A termination assembly for use in an optical hydrophone module, comprising a module oil seal and an optical fiber seal. The termination assembly is used at the ends of modules and provides a means for filling individual modules with fill fluid. A module oil seal comprises a cylindrical wall defining a cavity, with one end substantially closed and the other end open. An annular face plate on the open end makes a seal dividing a coupling and a clevis. A check valve is mounted to an orifice that passes through the substantially closed end of the module oil seal. Optical fibers pass through the substantially closed end and the optical fiber seal is provided around the optical fiber that passes therethrough. The fiber seal fits snugly in a module oil seal opening. Both components serve to provide a seal that can withstand high pressures and maintain optical fiber integrity.
摘要:
A receiving beam is formed using 60 elements arranged in a 90° sector area of a cylindrical receiving array. Receiving beam 0 is formed with elements 0-59 divided into two (front and rear) groups. Specifically, the elements 0-59 are divided into rear group 1 (elements 0-8, 51-59) and front group 2 (elements 9-50) in the beam direction, and the receiving beam is formed by using sample data obtained from the transducer elements 0-8, 51-59 of group 1 in a current scanning cycle as well as sample data obtained from the transducer elements 9-50 of group 2 in a preceding scanning cycle. This approach makes it possible to form the receiving beam such that incoming waves of a short-pulse signal would simultaneously hit the relevant transducer elements of the receiving array and thereby improve directivity and sensitivity of the receiving beam for the reception of short-pulse waves.
摘要:
An electric trolling motor for propelling a boat and comprising an electric propulsion motor having a substantially cylindrical motor housing and an electric trolling motor end cap for mounting and protecting a transducer therein, the end cap comprising a body portion having a recess integrally formed therein for receiving a transducer in the recess and a transducer removably mounted in the recess, a bore formed in the end cap creating a passageway extending from the exterior of the end cap to the interior of the recess, and a releasable air pressure seal for obturating the passageway and retaining the transducer in the recess when the passageway is obturated, and releasing the air pressure seal when the passageway is opened; also, a novel end cap for electric trolling motors.
摘要:
An assembly module provides well-organized optical fiber component attachment features and convenient fiber routing areas for assembling and containing a fiber optic device such a telemetry module. The module comprises a first substrate having a first side and a second side. The first side includes a plurality of sidewalls and a recessed floor surface bounded by the sidewalls. Some of the sidewalls have a cavities formed therein. A plurality of channels extend from the ends of the cavities. A plurality of projections extend from the sidewalls over selected portions of the floor surface such that a lower edge of each projection is spaced apart from the floor surface. Optical fiber components (couplers, splices, etc.) may be mounted in the cavities, and optical fibers are routed to and from the optical fiber components on regions between the sidewalls and through the channels. The optical fibers are placed in the spaces between the projections and the floor surface to retain the optical fibers in selected positions. The assembly module provides for preasembled, pretested, mass produced, fiber optic coupler and excess fiber subassemblies and reduces the potential for component and fiber damage during manufacturing and allows for, but reduces the need for, the potential rework and repair associated with errors and failures during array assembly, thereby reducing manufacturing cost.
摘要:
Device (20) for measuring pressure waves in a liquid medium (E), comprising; one or more sensor elements (23) permeable to optical radiation; one or more support members (22) on which a sensor element (23) is arranged in each case and which is at least slightly flexible; a chamber (25) at least partly enclosed by a support member (22) and filled with the liquid medium; and a second compensation chamber (27) which is actively coupled to the first compensation chamber via an at least partially flexible wall (26), wherein the second compensation chamber is filled with gas; and detection means for detecting changes in the length of the sensor element.
摘要:
A device for transmitting acoustically toward the bottom of the sea includes an arrangement of a cable 404 containing vertically suspended electro-acoustic transducers 403 wherein each of said transducers are assigned to a frequency of the pulse spectrum to be emitted. The transducers are attached to the cable at such positions whereby the wave transmitted toward the sea floor is in phase with the reflective wave on the surface of the sea The superimposition of different elementary signals constitutes a single strong pulse. The device replaces air gun devices for oil exploration.
摘要:
In a preferred embodiment, a flexural plate sound transducer (150), including: a housing (152) having an open central volume (172); a flexural plate (154) attached around an inner surface of the housing (152) and extending across the central volume (172); at least one piezoelectric element (162, 164) attached to a surface of the flexural plate (154); and a mechanical hinge (194) formed in the flexural plate (154) and extending around the flexural plate (154) near an outer periphery thereof, the mechanical hinge (194) being formed such as to cause the flexural plate (154) to move in a substantially piston-like manner when the piezoelectric element (162, 164) is energized.