Test & Measurement

Smart Buoy Measures Water Pollutants

The current way of using the multi-algae sensor; in the future, it will be operated automatically from buoys, together with other sensors. (Photo: bbe Moldaenke) Extensive water monitoring is indispensable for drinking water supply and water protection. Researchers have developed a smart monitoring system that combines various technologies in a depth-profile-measuring multi-sensor buoy for monitoring water bodies and algae growth. Conventional monitoring strategies are frequently based on a multitude of independently acting sensor systems. This aggravates and slows down integrated data evaluation.

Posted in: News, Measuring Instruments, Test & Measurement

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Ultrasensitive Sensors Keep Driverless Cars Safer

Sensor chips are implemented in CMOS technology. (© Photo Fraunhofer IMS) News of the first serious accident involving an automated electric vehicle made headlines recently. Researchers are counting on light detection and ranging (LiDAR) technology, in combination with other components, to fulfill the requirements for independent steering, braking, and acceleration.

Posted in: News, Sensors, Test & Measurement

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Military Sensor Inspires Instrument to Search for Life on Mars

This artist’s rendition shows how BILI could operate on Mars. (NASA) A sensing technique used by the U.S. military currently to remotely monitor the air to detect potentially life-threatening chemicals, toxins, and pathogens has inspired a new instrument that could “sniff” for life on Mars and other targets in the solar system.

Posted in: News, Data Acquisition, Detectors, Sensors, Measuring Instruments, Test & Measurement

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Small-Body Testbed

The system can simulate a microgravity environment with a wide range of terrain types and topographies.This technology allows one to test small-body surface mobility and sampling systems in the laboratory. It is capable of simulating a microgravity environment with relevant terrain. The magnitude of the gravity, the terrain properties, and the surface system being tested are all easily modified to allow for a broad range of experimental setups.

Posted in: Briefs, Test & Measurement

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Photogrammetry System and Method for Determining Relative Motion Between Two Bodies

Highly accurate, flexible system measures relative dynamics in six degrees of freedom.NASA’s Langley Research Center has developed a novel method to calculate the relative position and orientation between two rigid objects using a simplified photogrammetric technique. The system quantitatively captures the relative orientation of objects in six degrees of freedom (6-DOF), using one or more cameras with non-overlapping fields of view (FOV) that record strategically placed photogrammetric targets.

Posted in: Briefs, Test & Measurement

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Directed Design of Experiments for Validating Probability of Detection Capability of a Testing System

NASA’s Langley Research Center has developed new software that enables users of critical inspection systems to validate the capability of the inspection system. Traditionally, inspection systems are validated using various methodologies to determine probability of detection (POD). One widely accepted metric of an adequate inspection system is that there is 95% confidence that the POD is greater than 90% (90/95 POD). Directed Design of Experiments for Probability of Detection (DOEPOD) is a user-friendly software package that enables detailed analysis of 90/95 POD or at any specified confidence level. Although it was designed to validate the capability of inspection systems to find fracture- critical flaws in materials, DOEPOD can be applied to systems to locate any type of flaw as well as to validate the detection capability of personnel. DOEPOD can also be employed as the core of an NDE (nondestructive evaluation) system, and provide accurate on-demand validation of the inspection system.

Posted in: Briefs, Test & Measurement

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Method and Apparatus for Measuring Surface Air Pressure

This technology enhances the predictive capabilities of weather forecasting models.NASA’s Langley Research Center has developed a novel method for long-range atmospheric pressure sensing. Based on known properties involving oxygen density, the technology is able to measure small pressure changes over a wide area. NASA developed the technology to address known gaps in the area of weather forecasting as a result of the inability to accurately detect atmospheric pressure above the ocean. Oxygen band reading can be performed remotely, most likely from a satellite-based system. The technology is particularly applicable in the area of storm forecasting.

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