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  • Portable Optical Fiber Cable Storage Reel | TechLink
    the cable Deploying the cable requires a rod inserted into the center hub of the spool and held at each end by two people while a third person unrolls or rewinds the cable This utilizes valuable manpower and time especially in a military environment In addition the spool is often rolled on the ground to deploy the fiber cable which can damage the fragile cable due to spool hub and rim diameter differential Naval Surface Warfare Center Crane Division has developed patented and field tested an easy to use cable reel suited for 100 lb fiber optic cable that can be operated by one person This technology reduces failures increases the capability of the cable by protecting its shape during reeling and increases mean time between failures The cable reel has a patented bearing system that allows the discs to spin independent from the spool This allows easier rewinding with a hand crank whether the reel is stationary rolling on the ground or in the back of a moving vehicle The long side will unreel from the top and the short end side will unreel from the bottom Alignment tabs are used to help align the reel when removing or installing on a trailer In addition the cable reel reduces the amount of manpower required for set up and tear down Benefits User Friendly Allows cable to be deployed by one person reducing the amount of manpower required for set up and tear down Damage Control Allows easier deployment of a cable without stretching or dragging cable Saves Time Allows easier rewinding with a hand crank or rolling on the ground or in the back of amoving vehicle The Opportunity Issued US patent 8 444 078 is available for license Potential for collaboration with lab researchers Additional information available at

    Original URL path: http://techlinkcenter.org/summaries/cablereel (2016-02-09)
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  • Novel Waveform for Wireless Communication and Noise Correlation Radar Detection/Imaging Applications | TechLink
    The robustness of the waveform means it retains fidelity even in a crowded radio frequency environment The low probability of intercept enables a level of security not currently available to radar The same security and fidelity features also make the APCN waveform and NCR techniques attractive for civilian and first responder wireless communication applications Global communications bandwidths are increasingly crowded as new technologies continually encroach via higher power and larger bandwidth applications The APCN NCR technologies could augment existing systems providing another mode of operation in crowded radio frequency spaces such as aircraft police radar WIMAX and advanced wireless communications including 4G Benefits Technique Fusion The CERDEC system embodies the ideal characteristics of both noise radar and pulse Doppler radar by amplitude phase modulating a complex pulse linear FM LFM waveform using noise Robust The unique matched filter signal processing solution is inherently mismatched to all other communications signals making the system practically immune to interference and channel fading Secure Extremely low probability of interception LPI based on the random nature of the signal and the design of the APCN waveform provides a level of security previously unavailable The Opportunity Issued US Patent available for license Click Here for Patent

    Original URL path: http://techlinkcenter.org/summaries/novel-waveform-wireless-communication-and-noise-correlation-radar-detectionimaging (2016-02-09)
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  • Lithium-Ion Battery State-of-Health Monitor | TechLink
    the relative impairment level reported from minor green to severe red The Technology The US Naval Research Laboratory NRL has developed a diagnostic tool that tests entire battery packs to determine in real time if a cell within the pack has suffered damage without the need to individually test each cell separately A single damaged cell can create an unreliable or even dangerous situation even though the battery pack as a whole exhibits normal voltage behavior NRL s diagnostic applies a small AC current or voltage to a battery at a specific frequency which is invariant with battery state of charge Changes in the impedance response are indicative of damage or abuse within the cells The NRL single point diagnostic technology can operate as a stand alone diagnostic or in real time as part of an online monitoring system Testing has demonstrated that the diagnostic is sensitive enough to detect a single overcharge event in one cell of a battery pack Thresholds can be established to indicate relative damage and safety levels of a battery pack from a unit that has a single cell that is starting to fail up to a unit that is nearing catastrophic Benefits Simple The single point impedance diagnostic method can detect damage to individual cells through a single connection to the battery pack an a priori baseline for an individual unit is not required once a particular make model of battery has been characterized Efficient The use of a single frequency enables a quick test the diagnostic can work in real time and health can be monitored regardless of the batteries state of charge Sensitive The NRL battery health monitor can detect an initial overcharge as well as report relative levels of damage from minor impairment to nearly catastrophic failure The Opportunity Published US

    Original URL path: http://techlinkcenter.org/summaries/lithium-ion-battery-state-health-monitor (2016-02-09)
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  • METBENCH Automated Calibration System | TechLink
    execution component interfaces with more than 800 pieces of equipment greatly increases calibration efficiency eliminates technical errors and lowers the skill level required to perform accurate calibration operations Procedures can be standardized and readily updated to ensure consistency and compliance throughout an enterprise METBENCH also features automatic data collection and information flow and calibration laboratory management features and functions The US Navy already saves millions of dollars by implementing METBENCH in the fleet and estimates savings of 65 million from 2011 to 2017 Paperless calibrations and automated calibrations both save time further enhancing efficiency by allowing for more calibration throughput The Pearl Harbor Naval Shipyard anticipates conducting 1 500 more calibrations per year because of efficiencies gained from METBENCH For one particular radar set found on every naval surface vessel a calibration procedure that used to take one week now requires only one day Benefits Time Savings The time needed to calibrate has been reduced by 80 for more than 800 types of equipment through automated calibration and paperless calibration procedures and data collection Simple METBENCH includes detailed procedures descriptions and equipment connection diagrams to ensure the correct calibration setup actual calibration process is automated Military Grade Deployed throughout the

    Original URL path: http://techlinkcenter.org/summaries/metbench-automated-calibration-system (2016-02-09)
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  • High Performance Conformal Mobile Antenna | TechLink
    to half wave dipole antennas The antenna performs best at the most critical orientation directly overhead in an antenna radiation pattern where overall signal strength and the potential for unwanted interference is the largest and most likely to occur during SATCOM events and maintains high performance over wide angles of incidence encountered by in the field by mobile craft and vehicles The Navy antenna was designed for low profile conformal form factors including spray on applications The design is amendable to a variety of materials and maintains standard 50 ohm feed point impedance for use with standard radio equipment The improved gain and signal isolation benefits are created through an innovative layout that feeds two delta loops in parallel and in phase The delta loops are rotated 90 degrees orthogonally and translated linearly with respect to the axis of rotation Benefits High Gain Average 3 4 dB gain improvement for signals directly overhead compared to typical SATCOM antennas maintains high performance over the range of incidence angles required for rapid mobile communication Excellent Cross Polarization Rejection Innovative design achieves 30 dB isolation as measured at US Navy communication test facilities Highly Adaptable Extremely low profile for spray on and other

    Original URL path: http://techlinkcenter.org/summaries/high-performance-conformal-mobile-antenna (2016-02-09)
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  • Conformal Broadband Dielectric Measurement Probe | TechLink
    frequencies to identify materials and material dielectric and magnetic properties A patent pending improvement adds conformal capabilities to take measurements on curved surfaces The device functions by simultaneously measuring the complex scattering of s11 reflection and s21 transmission Reflection is measured in magnitude and phase over various frequencies creating a chart unique to each specific material Material characteristics can be computed from the measurements by a network analyzer or other analyzer devices Existing devices such as parallel plates and waveguides suffer from narrow bandwidth poor performance on lossy materials such as biological materials high in water or fat and typically require a specific shape in order to accurately measure a sample The Navy s device has been operated from 30 MHz to 600 MHz Labview software has been developed to conduct the patented data calculations The device is field portable and rugged Benefits Broadband Operates over a wide range of frequencies for more effective use on a large cross section of materials Simple Calibration is fast via a visual method the device is touched to the subject material to take measurements and the data is crunched to provide results Field Portable Small rugged device can measure flat and smooth surfacesSilicate

    Original URL path: http://techlinkcenter.org/summaries/conformal-broadband-dielectric-measurement-probe (2016-02-09)
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  • Antenna System Testing Simulator | TechLink
    fleet an antenna system testing unit that simulates the presence and operation of single and multi antenna systems The simulator mimics the presence of and signals from the desired antenna or array so test devices can determine if antenna control equipment is properly steering an antenna or correctly signaling transmission or receiving modes at the desired frequencies The simulator is small approximately shoe box size inexpensive to build and simple to connect The simulator provides signals that make the equipment being tested believe it is actually connected to a particular antenna or array The simulator processes control signals from the control device under test and returns appropriate status word signals reflecting various antenna configurations The simulation makes it possible to test the reading and writing characteristics of the signal processing control device to ensure proper operation over the range of steering transmit receive and other control functions Benefits Portable Rugged Device in use by the US Navy is smaller than a shoe box and designed for use at sea Simple Two quick connections are all that are required to setup the simulator for testing Inexpensive Simulator components are low cost and available from commercial off the shelf COTS sources The

    Original URL path: http://techlinkcenter.org/summaries/antenna-system-testing-simulator (2016-02-09)
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  • Precise and Portable Antenna Test System (PAPATS) | TechLink
    has developed built and patented the precise and portable antenna test system PAPATS which can be set up in the actual field environments where an antenna system would be deployed PAPATS employs near field techniques in a manner that can quickly and accurately measure far field signal patterns The device consists of a computer a robotic positioner a probe and the antenna under test AUT The robot can move the probe the AUT or both over the desired test surface Additionally either the probe or the AUT can transmit while the other receives Traditional near field testing occurs either in fixed indoor facilities or on a large diameter turntable Indoor facilities are not able to replicate the diverse impacts caused by differing ground surfaces such as asphalt grass and sand Turntables can also introduce errors into the testing process Far field testing requires large areas which are increasingly difficult to secure and the vast distances increase the likelihood of interference from terrain vegetation weather buildings and other signals PAPATS employs a highly precise real time kinematic global positioning system RTK GPS coupled with an inertial measurement unit IMU to provide the precision of an indoor facility in a field portable system Benefits Precise Indoor positional accuracy in a portable outdoor unit IMU provides pointing accuracy within 1 2 degree and RTK GPS provides location accuracy of 1 cm horizontally and 2 cm vertically Portable Can be set up outdoors in a variety of field environments in order to assess the impacts of varied ground materials on antenna patterns Efficient Thoroughly determine far field antenna patterns and polarization measurements for high frequency antennas in a small test range space The Opportunity US patents 8 421 673 and 8 077 098 published US patent application 2013 0093622 and software code available for

    Original URL path: http://techlinkcenter.org/summaries/precise-and-portable-antenna-test-system-papats (2016-02-09)
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