Time filter

Source Type

Groton, CT, United States

Agency: Department of Defense | Branch: Air Force | Program: SBIR | Phase: Phase I | Award Amount: 99.98K | Year: 2011

ABSTRACT: In order to avoid potential collisions with space debris future spacecraft in geosynchronous (GEO) orbit may be required to detect all objects in their local environment and will be required to have 4pi steradian coverage. Unfortunately the sun can blind and/or damage these sensors if precautions are not built into the sensor. APS is proposing to use an ultra-narrowband filter (0.001 nm), called a Differential Doppler Imager (DDI), to reject the broadband blackbody spectrum of the sun; it uses an atomic emission line from the sun itself as the illumination source for the object. The filter is passively (naturally) locked to the chosen atomic line and only allows that line to pass through the optical system. Rejection of background light can be very high (enables imaging in solar disk) while maintaining high in band filter transmission. APS has: a unique atomic physics computer code that properly models these filters, the ability to model the full optical system performance, and built many of them at a variety of wavelengths. Since the DDI uses the Doppler shift of atomic lines to reject background the device can also measure the line of sight velocity component of the debris. BENEFIT: The successful demonstration of imaging in very high dynamic range conditions could have many possible applications in both defense and industry. The proposed instrument enables the GEO satellites to identify, track, and avoid potentially lethal debris. This technology could also be used to build an optical ground moving target indicator instrument for satellite, aircraft, or UAV surveillance missions. A similar sensor might also be used to image high brightness arcs or exhausts in an industrial setting. Another very interesting application is as a passive wind speed monitor for airports or other research applications.

Agency: Department of Defense | Branch: Navy | Program: SBIR | Phase: Phase I | Award Amount: 100.00K | Year: 2011

APS will expand on available and evolving analytical/numerical tools to address design and performance parameters for Permanent Magnet couplings and gears. APS has developed complex modeling tools for designing and assessing current permanent magnet (PM) motors under ONR sponsorship. These tools have been transitioned to magnetic gear applications, as techniques for addressing flux densities, material modeling, torque calculation, electromagnetic losses and noise performance are comparable for both PM motor and PM gear set machines. Additionally, APS has leveraged available FEA tools to address design nuances that influence the performance of PM gear sets, most specific to the torque density of the device. APS will address not only combinations of mutually-influential design parameters, but also multi-physics relationships including magneto-thermal and magneto-acoustic concerns.

Agency: Department of Defense | Branch: Navy | Program: SBIR | Phase: Phase I | Award Amount: 79.99K | Year: 2011

Navy acoustic research and test laboratories, such as those at the Acoustic Research Detachment (ARD) and the Southeast Alaska Acoustic Measurement Facility (SEAFAC), use large, high gain hydrophone arrays to measure and characterize the radiated acoustic signatures of full scale and small scale submarines. Existing arrays have primarily been designed for low to mid frequency measurements (e.g., below 10 kHz). This SBIR topic seeks development of a"very high frequency"(VHF) high gain acoustic array which would eventually be integrated into the permanent test infrastructures at facilities such as ARD and SEAFAC. APS proposes development of a VHF High Gain Array (VHGA) that is intended to provide high gain and precision resolution in low ambient noise environments and that will maintain performance over extended deployments. The proposed VHGA uses a conical baffle with variable sensor spacing to meet the high array gain requirements of the system over the 10 80 kHz band of operation. APS proposes development of custom transducers and electronics with extremely low electronic noise to allow the array to be ambient limited even in low noise environments.

Agency: Department of Defense | Branch: Special Operations Command | Program: SBIR | Phase: Phase I | Award Amount: 100.00K | Year: 2011

Applied Physical Sciences Corp. (APS) in collaboration with Ocean Technology Systems (OTS) will develop a diver physiological monitoring (DPM) system with integrated microdisplay that easily retrofits with existing full face masks (FFM) and that leverages commercial-off-the-shelf biometric sensors. The capability to quantitatively evaluate and assess a remote diver"s status will significantly improve situational awareness and ensure safe and effective operations. In that regard, the DPM system will acoustically transmit diver heart rate, respiratory rate, and body temperature to a surface station in real-time whereby a training supervisor can keep track of individual divers during training exercises. The DPM system will be integrated with a digital head mounted display and a diver communication system. The focus of the Phase I effort is to evaluate and integrate physiological sensors into an existing Scuba FFM that is reliable, accurate, and unobtrusive to the diver. Commercialization within SOCOM, the US Navy, and the United States Coast Guard will be pursued.

Agency: Department of Defense | Branch: Navy | Program: SBIR | Phase: Phase II | Award Amount: 492.96K | Year: 2012

The Phase II effort consists of a 12-month Base and two 6-month Options. The Base is centered on the design, fabrication, and test of a prototype projector and power electronics. Testing is planned at NUWC Seneca Lake to evaluate the projector"s electro-acoustic performance. The first Option is geared on the design, fabrication, and test a prototype acoustic communication system that relies on the hardware developed during the Base. Testing is planned at NSWC Lake Pend Oreille to evaluate the communication system"s performance resulting from the transmission of PRN, BPSK, and QPSK waveforms. The second Option considers a system engineering study to transition the prototype communication system for use at the Aloha Cabled Observatory located 100 km from Oahu, HI.

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