Sensors/Data Acquisition

Microphones and Accelerometer Sensors Network for Acoustic Diagnostics (MASNAD)

This network of sensors can pinpoint sounds in any mobile platform. NASA’s Jet Propulsion Laboratory, Pasadena, California A system has been developed using sound to detect problems on rovers or other remote platforms autonomously. It consists of a sensor array of microphones and accelerometers that uses the differences in the sounds generated by the motors, gears, instruments, or other devices being monitored to determine abnormal operation conditions.

Posted in: Briefs, TSP, Detectors, Sensors

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MEMS Gyroscope with Dual Interferometric Sense Elements

This sensing technique enables the use of a large proof mass with very low thermomechanical noise. John F. Kennedy Space Center, Florida High-performance inertial sensors, such as ring laser gyroscopes or fiber optic gyroscopes, have sufficient performance to enable “dead reckoning” navigation for adequate periods of time. Smaller microelectromechanical system (MEMS) inertial sensors, such as MEMS gyroscopes and MEMS accelerometers, typically have relevant performance characteristics that are 10 or 100 times worse than high-performance inertial sensors. As a result, these small MEMS inertial sensors must be aided by a global positioning system (GPS) if they are to be used for navigation.

Posted in: Briefs, TSP, Sensors

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MMOD Risk Mitigation Technology for Spacecraft Thermal Protection Systems

The ingestion of high-temperature plasma through a small breach could be prevented by providing adequate counter pressure. Lyndon B. Johnson Space Center, Houston, Texas The proposed concept uses sensors to detect high-temperature plasma ingestion during entry through a breach in the thermal protection system (TPS) caused by a micrometeoroid orbital debris (MMOD) impact. It uses consumables usually available on human-rated spacecraft such as gaseous nitrogen (or helium) and water to maintain spacecraft structural integrity by keeping it within the temperature limits via an evaporative cooling effect and to equalize the internal and external pressures to prevent high-temperature plasma from flowing further into unintended areas. Once a breach was detected, the system could be activated autonomously or manually by the flight crew, or by telemetry from the ground crew.

Posted in: Briefs, TSP, Detectors, Sensors

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Shock-Sensing Apparatus

This apparatus enables easy and reliable shock detection and localization in high-speed inlets of aerospace vehicles. John H. Glenn Research Center, Cleveland, Ohio Acompact shock-sensing device, which employs an innovative light sheet generator, has been created. The device may be used either as a solo aerodynamic shock detector or in combination with a scanning mode shock sensor. This permits easy detection and tracking of unstable and traveling shocks in supersonic inlets.

Posted in: Briefs, TSP, Lasers & Laser Systems, Detectors, Sensors

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Development of a Turnkey Clear Air Turbulence Detection System

Turbulence is determined via three infrasonic microphones. Langley Research Center, Hampton, Virginia Currently, the only available means of reporting clear air turbulence (CAT) is the pilot report (PIREP), whereby a pilot experiencing turbulence reports their location and associated data. In this report, a system is proposed that would allow the detection of CAT through infrasonic emissions.

Posted in: Briefs, TSP, Aviation, Detectors

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RR1P Rugged ATR Pluggable Canister RAID Data Storage Delivers Continuous Data Recording for ISR

RR1P removable canister RAID data storage system enables military ISR data to be removed from a plane, ship or ground vehicle in under two minutes. The canister connects to the ¾ ATR chassis with a military grade connector designed for 10,000 insertion cycles. It weighs only 25 pounds including a five pound removable canister with up to 19.2 TB of compact, rugged, high performance mobile RAID data storage.

Posted in: White Papers, White Papers, Data Acquisition, Sensors, Electronics & Computers

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Comparison of Interface Pressure Measurement Options

An increasingly competitive global marketplace means that design engineers must efficiently deliver a high quality product. Countless emerging technologies impact the design process and engineers must practice due diligence to ensure analysis tools meet their application’s requirements. This paper focuses specifically on technology for interface force and pressure measurement between two surfaces and includes a review of technology composition and data output. This paper will also examine capabilities driven by form factor, precision and environment that influence selection criteria of interface force and pressure sensors.

Posted in: White Papers, White Papers, Sensors

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