Did You Know...
...that after Parker Brothers executives turned down the game of Monopoly because it had "52 fundamental errors" (including taking too long to play), a copy of the game wound up in the home of the company president who stayed up until 1 a.m. to finish playing it? He was so impressed by the game that the next day he wrote to inventor Charles Darrow and offered to buy it!
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| Number | Title | Issue Date |
| 7920821 | All ship speeds correlation SONAR simulator The present invention is a system that mathematically simulates acoustic waves that are reflected off an ocean floor from a SONAR transducer mounted on a ship, submarine, or other water navigable craft. By varying the number of mathematical equations, the form of th... | 04/05/2011 |
| 7409323 | Method for detecting a spatial random process using planar convex polygon envelope A method is provided for automatically characterizing data sets containing data points, which may be produced by measurements such as with sonar arrays, as either random or non-random. The data points for each data are located within a Cartesian space and a polygon ... | 08/05/2008 |
| 7269538 | Method for sparse data two-stage stochastic mensuration A method is provided for characterizing sparse data as either signal or noise. In one embodiment, a two-dimensional area which contains a distribution of data points of the sparse data from a selected time period is divided into equal size cells wherein each cell ha... | 09/11/2007 |
| 7266040 | Active sonar simulation An exemplary embodiment of the invention relates to a method and system for displaying simulated acoustically realistic active sonar signals. The method includes simulating a realistic sounding active sonar signal that originates from a simulated sonar transmitter. ... | 09/04/2007 |
| 7187619 | Method and apparatus for high-frequency passive sonar performance prediction A system and method for predicting passive, high-frequency sonar array performance at any underwater location, implemented as a software package running on a computer. An operator selects an arbitrary geographical location, specifies a sonar array and defines a targ... | 03/06/2007 |
| 7054229 | Multi-line towed acoustic array shape measurement unit An acoustic array comprising a plurality of nodes attached to two or more lines. Some or all of the nodes include an emitting transducer and a receiving hydrophone, and the balance include only a receiving hydrophone. Each emitting transducer has associated electron... | 05/30/2006 |
| 6584300 | Object-oriented system for simulating sonar target acoustic scattering A detailed sonar target scattering simulation system using object-oriented techniques to implement a broadband computational simulation of a plurality of detailed target highlight features. The class library includes a target class and a highlight base cl... | 06/24/2003 |
| 6150976 | Synthesis of overlapping chirp waveforms A digital radar landmass simulator (DRLMS) used for stimulation testing pulse radars, wherein the DRLMS operates by synthesizing time-overlapping chirp waveforms using finite impulse response filters. The DRLMS, thus, effectively generates many overlappin... | 11/21/2000 |
| 6118289 | Cleaning method and cleaning device and cleaning tool for board electrical-test probes, and board electrical-test device and method To securely clean dirty material deposited on ends of board electrical-test probes used in a board test device for executing tests including an incircuit test by a cleaning job executed once, the extreme ends of the contact pins of the board electrical-te... | 09/12/2000 |
| 6002914 | Method and apparatus for simulating reverberation in a multipath sonar system A method and apparatus for simulating reverberation signals in a multipath onar system is provided. The invention includes an input means for providing a plurality of simulated sonar system parameters. A defining means is joined to the input means to estab... | 12/14/1999 |
| 5995803 | Method and apparatus for simulating a multipath sonar system An apparatus and method is provided for producing an output simulating a tipath sonar system. An input means produces signals corresponding to sonar system parameters. A generator means is jointed to the input means to generate a plurality of eigenray pa... | 11/30/1999 |
| 5983067 | Method and apparatus for simulating cross-correlation coefficients in a multipath sonar system A method and apparatus for simulating the output of a multipath sonar sys. An eigenray module generates a plurality of eigenrays having terms that correspond with simulated parameters of a sonar system. A processing unit combines the eigenrays responsive... | 11/09/1999 |
| 5978647 | Method and apparatus for simulating autocorrelation coefficients in a multipath sonar system An apparatus and method is provided for producing simulated autocorrelation coefficients of a multipath sonar system. An input means produces signals simulating sonar system parameters including total spectral density and erage pressure. A defining mean... | 11/02/1999 |
| 5978646 | Method and apparatus for simulating a lofargram in a multipath sonar system A method and apparatus for simulating a lofargram in a multipath sonar sym is provided. The invention includes an input means for providing a plurality of simulated sonar system parameters. A defining means is joined to the input means to establish a plu... | 11/02/1999 |
| 5299171 | Torpedo decoy signal generator A torpedo countermeasure decoy which produces and broadcasts signals that e usually more attractive to a homing torpedo than those emanating from its intended target. Timely reset staircase generators combined with timely opened and closed gates generate ... | 03/29/1994 |
| 5062083 | Ping elongator-modulator for realistic echo synthesis A Sonar decoy system receives an interrogating pulse from an energy source nd then distorts, elongates, amplifies, and retransmits the pulse to simulate an echo of that pulse rebounding from the various reflecting surfaces of a moving submarine. To refine ... | 10/29/1991 |
| 5032083 | Computerized vocational task guidance system A system for training or aiding an impaired individual to perform a series of tasks at spaced work sites comprises a mobile device for being worn or carried by the individual. The mobile device comprises circuits and devices for detecting the position of ... | 07/16/1991 |
| 4991143 | Mobile target acoustic system This system is directed to an acoustic target simulator for use with active nd passive sonar systems. A receiver and a transmitter are mounted on the front and rear of the simulator. Separate high frequency channels are provided for the front transmitter a... | 02/05/1991 |
| 4973252 | Sonar simulation system using advanced digital to video conversion techniques A sonar simulation system comprises a general purpose digital computer and n interface processor which receives position and intensity information from the computer for the effects to be simulated and spreads the effects in range and bearing to simulate a ... | 11/27/1990 |
| 4972379 | Sonic echo simulator A sonic echo simulator for simulating sonar signals reflected from underwr targets having a transmitter which broadcasts sonar signals through a given amount of water toward a receiver for readout thereat. Prior to broadcast, various characteristics, suc... | 11/20/1990 |
| 4943951 | Depth finder with tutorial A liquid crystal display depth finder using a sonar transducer is provided with a plurality of input keys interfaced to a microprocessor with each input key being dedicated to a particular function or feature usable with the depth finder. The microprocess... | 07/24/1990 |
| 4759067 | Acoustic regenerator An apparatus for extracting, storing and repetitively replaying a broadband atasample is fabricated from proven electronic components to assure long term reliability and reproducibility. A broadband acoustic signal is digitized and stored in a RAM until it... | 07/19/1988 |
| 4667199 | Simulator A simulator for simulating radar or sonar signals returned to an observation point from a three-dimensional object of non-uniform reflectivity. An imaginary three-dimensional object is defined spatially in the form of a series of three-dimensional regular... | 05/19/1987 |
| 4393483 | Test set for a directional command active sonobuoy system (DICASS) A DICASS test set utilizes a microcomputer to process infromation from an put and a down link section, generate the appropriate control logic for all the various electronic sections and format the appropriate output data for the output in uplink sections.... | 07/12/1983 |
| 4347403 | Electrical waveform synthesizer This electrical waveform synthesizer uses a digital feedback loop circuit which includes selectable inputs for multiplex or recirculation operation, and a shift register whose shift rate is controlled by an adjustable precision clock so as to accurately a... | 08/31/1982 |
| 4250634 | Sonobuoy simulator device The invention relates to a simulator for providing waveforms of the type produced at a receiver from a sonobuoy transmission. The simulator signal includes a component representing reverberation under different sea state conditions and a component represe... | 02/17/1981 |
| 4219885 | Sonar target simulator 1. A system for simulating wave reflections from an irregular-shaped moving bject which has been illuminated with energy of frequency F, said system comprising; a receiver (10) for said frequency F; a generator (14) of white noise voltage; means (13) for amplit... | 08/26/1980 |
| 4057913 | Simulated training system that utilizes operational equipment The invention of this disclosure is a training system that utilizes operational equipment in conjunction with ground-based simulation training equipment. The apparatus of this invention comprises airborne military aircraft that contains avionics equipment... | 11/15/1977 |
| 3936954 | Electronic bearing selector for omni-directional signals 1. An electronic circuit for use with apparatus having timing signal geneing clock means and means for combining waveform information from a plurality of input channels into a single pulse train signal wherein time displacements of particular recurrent p... | 02/10/1976 |
