Matches 1 - 50 out of 164 1 2 3 4 >
Match Document Document Title
7362657 Aquatic object detection and disruption system  
A system includes a receive line array that generates one or more receive line array signals, a processor operatively connected to the receive line array to process the receive line array signals...
7245559 Acoustic fence  
Methods and apparatus determine if an underwater intruder passes under a protective boundary. A sonar sensor system comprises a plurality of sonar sensor modules that are spaced on a protective...
7233544 Harbor fence  
Methods and apparatus determine if an intruder passes into a security zone that is associated with a waterfront asset. An embodiment of the invention provides a harbor fence system that is designed...
7068166 Break-in detection system  
A break-in detection system includes a detection sensor of an FBG type for detecting an intruder trying to climb over a fence around a premises, and a detection sensor of an OTDR type for detecting...
7019649 Pool monitoring  
A pool monitoring system includes a hydrophone configured to generate an electrical signal in response to receiving a pressure wave in the liquid of a pool, and a processor configured to receive...
6980483 Harbor fence  
Methods and apparatus determine if an intruder passes into a security zone that is associated with a waterfront asset. An embodiment of the invention provides a harbor fence system that is designed...
6980109 System and method for monitoring intrusion detection in a pool  
A pool monitoring system includes a hydrophone configured to generate an electrical signal in response to receiving a pressure wave in the liquid of a pool, and a processor configured to receive...
6928030 Seismic defense system  
A set of seismic detectors is distributed throughout a defense zone in communication with a set of attack or other controllable devices. A seismic signal source controlled by a zone defense...
6879544 Manatee vocalization detection method and system  
Manatee vocalizations are detected by performing a variety of frequency domain processing operations on sound signals detected in an underwater region. Overlapping time windowed portions of...
6813220 Acoustic fence  
Methods and apparatus determine if an underwater intruder passes under a protective boundary. A sonar sensor system comprises a plurality of sonar sensor modules that are spaced on a protective...
6778469 Harbor fence  
Methods and apparatus determine if an intruder passes into a security zone that is associated with a waterfront asset. An embodiment of the invention provides a harbor fence system that is designed...
6697299 Individual authentication method, individual authentication apparatus, information communication apparatus equipped with the apparatus, and individual authentication system including the apparatus  
The object of the present invention is to provide an individual authentication method and apparatus that use no bulky apparatuses, are insusceptible to forgery, and use an auditory organ which is...
6552963 Firearm discharge detection device and warning system  
A firearm discharge detection device and alarm system featuring a plurality of detector units placed inside a structure which communicate with a central monitoring unit. Each detection unit will...
6400647 Remote detection system  
A remote acoustic detection system includes at least one detection unit delivered to a remote or inaccessible location by a missile or other aircraft. The detection unit monitors acoustic events at...
6288973 Sensor systems  
An acoustic sensor system for the detection, location and classification of sound-generating targets, such as helicopters, from a ship includes a base station aboard the ship, having a radio...
5777949 Trajectory matched passive detection system  
A passive target detection system for use with a moving platform which indes a module for postulating modeled target signals based upon a number of factors including at least one factor selected...
5721712 Aircraft detection system  
A covert aircraft detection system for a submarine is described which inces an acoustic antenna array and a signal processor to process the acoustic signals to provide the location of the detected...
5675553 Method for data gap compensation  
The present invention comprises a method for filling in missing data intels in a quantized time-dependent data signal that is generated by, e.g., an underwater acoustic sensing device. In...
5559758 Alerting process  
An alerting process is presented that uses the steps of first receiving at least a first signal from a signal source for a predetermined short interval. The first signal is analyzed over the...
5473942 Acoustic location fixing insect detector  
A device and a method for locating and counting insects in agricultural commodities has been developed. Acoustic sensors pick up sounds emanating from adult and or larval insects. The electrical...
5430690 Method and apparatus for processing signals to extract narrow bandwidth features  
A method and apparatus for processing a set of signals to identify narrow bandwidth features of the signals, and optionally to process the signals further to extract information about the...
5412622 Apparatus for discriminating sound sources in a water environment  
This invention provides an apparatus including a plurality of omnidirectional hydrophone sensors in a particularly configured array comprised of ring members which are carried between a plurality...
5373486 Seismic event classification system  
In the computer interpretation of seismic data, the critical first step is to identify the general class of an unknown event. For example, the classification might be: teleseismic, regional, local,...
5349524 Color flow imaging system utilizing a time domain adaptive wall filter  
An ultrasonic imaging system for displaying color flow images includes a receiver which demodulates ultrasonic echo signals received by a transducer array and dynamically focuses the baseband echo...
5339281 Compact deployable acoustic sensor  
A sensor for detecting acoustic energy emitted by a target is disclosed. The sensor comprises a housing including a plurality of transducers for receiving acoustic energy. The transducers are...
5268673 Wave motion detector for swimming pool  
A swimming pool alarm responsive to wave motion that will produce a signal when two waves exceeding a threshold level of amplitude are sensed within a preset duration of time. A transducer senses...
5245589 Method and apparatus for processing signals to extract narrow bandwidth features  
A method and apparatus for processing a set of signals to identify narrow bandwidth features of the signals, and optionally to process the signals further to extract information about the...
5243565 Method of measuring directional spectra of surface gravity waves  
A new method for measurement of the directional spectra of surface gravity (water) waves. Measurements are made at a single point by orthogonally mounted seismometers buried below the seabed...
5231609 Multiplatform sonar system and method for underwater surveillance  
A system and method of indirect underwater acoustic ocean surveillance is sclosed requiring at least two sonar platforms, usually ships, travelling some distance apart. At least one of the...
5218574 Electrical firing circuit  
A firing circuit for use in booby traps providing four different operatio modes. A capacitor stores energy which is discharged through an electrical detonator upon the activation of a silicon...
5214618 Method and arrangement for combating a submerged target object  
A method for combating a submerged target object through the intermediary of an active body which is deployable in an airborne mode, and which picks up a sonar contact with the target object from a...
5195060 Security system for swimming pools and like bodies of water  
An apparatus for detecting a person in a body of water includes a transmitter for generating an electrical swept frequency signal having a frequency that continuously varies between upper and lower...
5194848 Intrusion detection apparatus having multiple channel signal processing  
Intrusion detection apparatus for use in perimeter security systems and the like is provided with multiple channel signal processing. Each signal processor includes a bandpass filter whose passband...
H001123 Off-route non-contact system for detecting vehicles  
A system for detecting the approach of a vehicle toward the line of sight an antenna comprises an alerter for receiving an acoustic noise signal from the vehicle and determining whether the signal...
5162777 Submerged alarm device for monitoring swimming pools  
An alarm device is placed in the water of a swimming pool for monitoring the swimming pool by triggering an alarm in response to changes in water pressure or sound as a result of persons falling...
5161127 Method of determining the target direction and target range of sound generating targets  
A method is disclosed in which the direction and range of sound generating targets (2) is determined solely by means of passive sensors (10, 11). In this connection it is proposed to employ a...
5142508 Aquatic transducer system  
An underwater transducer system reproduces high-fidelity audio signals underwater, and detects and monitors low levels of sound activity, both adjacent to a body of water such as a swimming pool,...
5138587 Harbor approach-defense embedded system  
Acoustically mapping (fingerprinting) the main channel, or `Q` routes, of a arbor, over relatively long time periods by using transducers anchored near the harbor or Q route floor. Sonar pulse...
5121104 Pool alarm  
A swimming pool alarm responsive to wave motion that will produce a signal when two waves exceeding a threshold level of amplitude are sensed within a preset duration of time. A transducer senses...
5107250 Detection of moving objects  
A system for detecting and classifying vehicles, moving in the vicinity of a seismic detector, includes a time threshold circuit and, complementary to this circuit, two parallel amplitude detector...
5060206 Marine acoustic aerobuoy and method of operation  
A marine acoustic detector for use in identifying a characteristic airborne sound pressure field generated by a propeller-driven aircraft including a surface-buoyed resonator chamber tuned to the...
5054006 Seismic-acoustic detection device  
A detection system for indicating the presence of motorized equipment in a esignated area having an acoustic sensor, a seismic sensor and an acoustic signal transmitter. The seismic sensor output,...
5047995 Detection of moving objects  
A detector system having a channel for comparing the peak amplitude of at least one of two electrical signals, produced at the output of two spaced geophones, against an amplitude threshold, to...
5038328 Band pass filter  
An active, relatively high gain, low power consuming band pass filter circuit centered at approximately 6 KHZ and having a pass band of 100-200 HZ. In a disclosed glass breakage sensor, the filter...
5034931 Display detection enhancement  
A system and method for enhancing detection of target signals in a passive detection system. The present invention enhances noise limited detection by combining energy from several frequencies, the...
5023847 Boom event analyzer recorder  
An analyzer recorder collects sonic boom information of supersonic aircraft and launch vehicles, for use to validate Environmental Impact Statements that contain supersonic aircraft activity. The...
5007032 Acoustic alert sensor  
An acoustic detector for detecting acoustic signals produced by vehicles. The detector comprises an acoustic sensor which senses an acoustic signal which is provided to a zero crossing detector....
4975891 Vehicle sensing device and method  
A land vehicle sensing device includes a geophone for detecting vibratory gnals and a bandpass amplifier for limiting the electrical output of the geophone to those signals indicative of land...
4934478 Contact sensing apparatus and method  
A sensing apparatus capable of delivering a control signal in response to contact between an element of the apparatus and an external object should respond readily to a predetermined level of...
4932009 Apparatus and method for detecting swimmers  
An apparatus and allied method for detecting the presence of submerged, possibly distressed swimmers in a body of water employs a plurality of pairs of transducers arranged on opposite sides of the...
Matches 1 - 50 out of 164 1 2 3 4 >