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Carriage Life Monitoring Of External Stores
Navy SBIR FY2011.2
| Sol No.: |
Navy SBIR FY2011.2 |
| Topic No.: |
N112-094 |
| Topic Title: |
Carriage Life Monitoring Of External Stores |
| Proposal No.: |
N112-094-1163 |
| Firm: |
RNET Technologies, Inc.
240 W. Elmwood Dr.
Suite 2010
Dayton, Ohio 45459-4348 |
| Contact: |
Tood Grimes |
| Phone: |
(937) 433-2886 |
| Web Site: |
www.rnet-tech.com |
| Abstract: |
RNET and Purdue will develop an ultra-low power carriage life monitoring sensor for external stores. The system will use a minimal number of sensors (biaxial linear accelerometers and biaxial gyroscopes) and the power consumption will be optimized by incorporating innovative time and frequency domain event recognition algorithms. A biaxial AC couple accelerometer and a biaxial gyroscope will allow the identification of platform shutdown/start, steady state flight hours, maneuvering flight hours, count of adjacent store firings, onboard gunfire, and ballistic/fragment impacts. The two sensors can be trigger counters and data collectors that will enable the events to be identified offline. The system will be event driven, and not require a microprocessor for normal operation. Asynchronous processing triggers, including analog triggering sensors and wake-on-RF, will eliminate the need for synchronous networking or sensor processing. RNET will develop the required ASICs using ultra-low power techniques utilizing "independent double gate" (IDG) technology.
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| Benefits: |
In order to maximize the effective lifetime of military stores (e.g., 2.75-inch guided missiles/rockets, AIM-9M/9X, JAGM, and JDAM tail kits), it must be feasible to measure the vibration induced on the store. The type and duration of the vibrations will drastically alter the usable lifetime of the device. If the vibrations cannot be measured, the health of the device must be estimated (as is done today) based on the number of hours of usage. The inaccuracies in health monitoring caused by estimating damage based on flight times leads to conservatives bounds on device longevity, as it is unacceptable to "guess" that the device can last longer then it actually does. In addition, if the devices must be deployed longer due to budget or mission issues, there is no mechanism to determine which, if any, of the devices must be decommissioned for the safety of the crew and mission.
A device that can accurately sense and record the vibrations induced on the store will allow the actual health of the device to be calculated from its environmental exposure, rather then estimated from flight hours. This will allow stores to be "in service" for a longer period of time, because the derived calculation will have a smaller error then the current estimates based on flight hours. This will reduce costs, and improve the safety and success of the crew and mission.
In addition to the carriage life monitoring of external stores, the system will lead to a long life sensor system that can provide 10+ years of sensing without the need for any physical human interaction. This will enable sensing systems for a wide range of users and have wide applicability. The life monitoring system to be developed will also be directly applicable to other commercial and government users, e.g., transportation monitoring systems, structure/life monitoring of buildings and bridges.
The more general sensor system will be able to support a wide range of users and missions including, but not limited to, defense (e.g., physical intrusion detection, movement or removal of sensitive equipment, environmental monitoring, equipment tampering), energy (e.g., monitoring of nuclear materials, SmartHome), other government agencies (e.g., traffic monitoring, border monitoring), private security firms (e.g., security monitoring), and other private industries (e.g., shipping monitoring).
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