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Match Document Document Title
8908468 Wireless remote sensing system using surface acoustic wave sensor  
In an ON state, a first switch generates a transmission signal by pulse modulating a carrier. A SAW sensor outputs a reception signal after a delay from receipt of the transmission signal. In an...
8614578 Attenuation of electromagnetic signals passing through conductive material  
The present disclosure relates to determining the attenuation of an electromagnetic signal passing through a conductive material. An antenna is provided and placed in relatively close proximity to...
8594572 Wireless electric power transmission through wall  
An apparatus for wirelessly transmitting electric currents walls. The walls may be bulkhead compartment walls of a fixed structure or a vehicle or the like. The apparatus includes a wireless...
8547780 Acoustic markers  
An acoustic reflector is described comprising a shell around a core, in which portions of the shell are capable of transmitting acoustic waves incident on the shell into the core to be focused and...
8492692 Unmanned aerial vehicle based sonar buoy  
A sonar buoy includes a fuselage having a tube-like shape, one or more wings coupled to the fuselage, an engine coupled to the fuselage and operable to propel the sonar buoy through flight, and a...
8477562 Communication device and communication method  
A communication device includes: an ultrasonic oscillating unit which detects or generates an ultrasonic wave; a communication unit which transmits and receives information using the ultrasonic...
8442709 Underwater investigation system providing unmanned underwater vehicle (UUV) guidance based upon updated position state estimates and related methods  
An underwater investigation system may include a host ship, a UUV including a propulsion device and a steering device, and at least one sonar system. The system may further include a guidance...
8160276 Audio system and related method integrated with ultrasound communication functionality  
Audio system and related method integrated with ultrasound communication functionality are provided. A communication transmitting device of proposed invention modulates a communication signal of...
8077539 Acoustic reflector  
An acoustic reflector (10) suitable for use as a reflective target for navigational aids and for location and re-location applications. The acoustic reflector comprises a shell (12) arranged to...
7760585 Through the bulkhead repeater  
A method and apparatus for transmitting radio frequency signals and associated information through a plurality of compartments and associated bulkhead walls in a water vessel. The method and...
7610675 Method to produce a transponder  
A method to produce a transponder comprises the steps of positioning a coil comprising at least one coil end in a predetermined coil position and holding all of said coil ends in a respective...
7474208 Method and system for locating an object  
One aspect of the invention is a system for locating an object. The system may include, for example, an object electromagnetic receiver, an audio amplifier, an audio transducer, and an object...
7460433 Ultrasonic wave transmitting and receiving system for detecting underwater objects  
A trawl net (2) is attached to ends of warps (4) extending from a ship (6), such as a trawl boat, in the sternward direction, and a transponder (5) to transmit a response signal is attached to an...
7430152 System and method of operation thereof for increasing acoustic bandwidth of transmitting devices  
Disclosed is a system, and a method of operation thereof, which improves the RF link employed between a transmitting sonobuoy and an associated receiving aircraft. The sonobuoy receives acoustic...
7031224 Buoy-to-sailboat distance indicator system  
This system is intended for use during a regatta to indicate the distance between a sailboat and a race course marker buoy being rounded as part of the race. The system involves a transmitter on...
6934218 Sounding device for showing its location on a fish detector  
A sounding device for showing its location on a sonar fish detector including a sonar wave receiving unit (10) to detect the sonar signal, a sonar wave producing unit (20) to simulate the...
6904000 Object locator system  
This invention is a system for locating an object. A tag unit (100) that is attached or embedded into the object to be located generates radio frequency signals when excited by an ultrasonic wave...
6711095 Expenable/recoverable voice and data communications system buoy  
An untethered communications buoy system has an untethered buoy freely floating on the surface of water to not compromise the location of the submersible. The submersible has a cavity containing a...
6547733 Ultrasound imaging apparatus and method using Golay codes with orthogonal property  
Ultrasound images are obtained using a set of Golay codes with orthogonal property as ultrasound receiving and transmitting signals. Ultrasound signals having a plurality of codes are transmitted...
6307808 Methods and apparatuses for seismic prospecting  
An improved method and apparatus are provided for improving a coupling to a substrate and orientation of seismic receivers such as a geophone to a substrate for the analysis and gathering of...
5822272 Concentric fluid acoustic transponder  
An acoustic transponder method and apparatus provides a high degree of frency and target strength selectivity by utilizing two or more concentrically disposed, hollow spheres each containing...
5742251 Combat harness  
The harness comprises a plurality of elements, such as light detectors, a laser emitter and a master control unit. The elements are communicating by means of ultrasonic signals. Such signals...
5570323 Navigational device for a scuba diver  
A navigational device (10) for assisting a scuba diver in determining a direction toward and a distance from a dive boat (12) or to a buoy near the shore at which point the dive originated. The...
5504477 Tracking system  
A performer tracking system, and an associated method, for tracking movements of at least one performer upon a stage. A plurality of signal transmitters are positioned about the stage and transmit...
5148404 Transponder and method for the production thereof  
The invention relates to a transponder comprising a closed glass casing in which electrical components are placed, wherein the glass incorporates iron oxide, a method for the production of such a...
5136548 Remote-control system for closures  
A remote-control system for closures with a movable hand transmitter with at least one transmission key, this transmitter generating and radiating directed coded control signals upon actuation of...
5122989 Digital echo repeater  
The present invention relates to an echo repeater/beacon system for use ooard marine vessels and platforms. The system includes a hydrophone for receiving an incoming acoustic signal from a remote...
5065370 Programmable pulse shaper for sonobouy apparatus  
This invention discloses electronic circuit that can be either embedded in n oceanographic sonobuoy housing or used as stand-alone equipment and which establishes and generates sonar signals of a...
5054007 Handclap activated cat repelling device  
A compact, sound activated device for repelling house cats from indoor surfaces and areas. When triggered from a remote location by a sharp audio signal such as that of a human handclap, the...
5016227 Top mounted buoy signaling device  
A top mounted buoy signaling device for marine navigation which is selectively activated in response to a coded address signal. The buoy signaling device includes a buoy having a top mounted...
5008859 Acoustic transponder receiver circuit  
A transponder that responds differently to two different input signals. The first input signal is at a first frequency. The first input signal is detected by a first powered detector that operates...
4992988 Underwater acoustic control system  
An underwater acoustic control system for use in a subsurface unit receiv coded signals. A hydrophone receives the signal and enables an electronics package to supply a control pulse which could...
4951263 Spread spectrum underwater location beacon system  
An underwater location beacon emits a continuous wave signal which is phase-shift modulated by a pseudo-noise, spread spectrum code. This signal is detected with an exact replica of the...
4903243 Marine transponder system  
A marine transponder system which is selectively activated to produce a predetermined signal pattern of light/sound/radio transmissions for maritime devices and structures such as navigational...
4894810 Method and a device for measuring a distance by means of ultrasonic pulses  
The invention relates to a method and a device for measuring a distance by means of an ultrasound. A drawback of this type of known methods for measuring a distance is that the transmitting and...
4829494 Acoustic pinger for use in high speed water entry test bodies  
Tracking and location of a high speed water rentry vehicle is assured by the inclusion of an acoustic source. An acoustic generator in the form of a piezoelectric transducer is potted in...
4751689 Method of measuring a distance  
Disclosed is a method for measuring a distance by using a radio-wave and an ultra-sonic wave. The method includes the steps of generating a certain start pulse in the form of a radio-wave between...
4654528 Radiation level reporting system  
A remote sensing transponder system is disclosed including apparatus for sensing gamma radiation levels proximate thereto, generating a signal indicative of the sensed radiation level, and...
4631708 Transmitter/responder systems  
A memory suitable for use as a responder, comprising: (a) receiver means for receiving a transmitted signal S1; (b) generator means (76) for generating a carrier component of a transmittable...
4604733 Apparatus for determining range and bearing  
Apparatus which provides both range and bearing information between a transponder and a transponder interrogator. The interrogator transmits an acoustic interrogating pulse which is received by...
4556883 Transmitting and receiving circuit for an apparatus for the automatic identification of objects and/or living organisms  
Transmitting and receiving circuit for an apparatus for the automatic identification of objects and/or living organisms, including a stationary interrogator and a transponder fastened to the...
4494224 Pipe measuring method and apparatus  
Method and apparatus for determining the length of a tubular member such as a pipe are disclosed. A burst of acoustical pulses are emitted from a sending unit and are received by a reference...
4486861 Transponder telemetry  
Acoustic transponders are attached to sections of a submarine cable for use in accurately locating the cable during deployment or retrieval. An acoustic signal at one frequency, transmitted from...
4404666 Quick deployment vehicle  
A quick deployment vehicle (QDV) for implanting a transponder or beacon on he ocean bottom in an upright position exposed for receiving or transmitting acoustic signals. The vehicle includes a...
4401987 Ranging system having reduced recognition jitter  
A ranging system employing a limiting constant false alarm rate (CFAR) receiver having reduced recognition time uncertainty, or recognition jitter. The jitter is made proportional to...
4388708 Method and apparatus for determining physical quantities  
A distance R to be measured is derived by measuring the spacing xm between a fixed transmitter Tx and a movable receiver Rx, and comparing this with the reference spacing xref between a fixed...
4381144 Underwater camera enclosure including sonar range finding device  
An underwater photographic system which includes an underwater camera enclosure having an underwater sonar range-finding apparatus for providing a signal to adjust the distance-related parameters...
4367458 Supervised wireless security system  
An ultrasonic communication system capable of wireless installation and supervised operation is achieved by communicating each information bit as two distinct ultrasonic frequencies separated in...
4318188 Semiconductor device for the reproduction of acoustic signals  
A microphone, for receiving an acoustic signal, is connected to a transducer which changes the analog signal delivered by the microphone into a sufficiently dense series of storable pulses in such...
4313183 Acoustic distance measuring method and apparatus  
An acoustic distance measuring device using a predetermined frequency shift keyed bit pattern as the acoustic signal transmitted and received. A phase lock loop detector is provided. Variations in...

Matches 1 - 50 out of 127 1 2 3 >