Sensors/Data Acquisition

How To Substantially Reduce Encoder Cost While Gaining Functionality With Multi-Turn Rotary Position Sensors

Many applications require rotation counters that can measure angles greater than 360º. However the low-cost 10-turn potentiometers most design engineers are familiar with can’t always meet user requirements for resolution and reliability. As an alternative, optical absolute encoders are too expensive for many applications. These solutions require a continuous power supply or they will lose count when power is restored. Also, geared technology/rotation counters are subject to significant wear.

Posted in: White Papers, Motion Control, Automation, Robotics, Data Acquisition, Sensors
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Will the voice become a mainstream way to control our devices?

This year's Consumer Electronics Show (CES) in Las Vegas showcased many new consumer products featuring voice control. LG, for example, introduced a smart refrigerator equipped with Amazon's Alexa voice service. Other CES technologies with voice-recognition capabilities included televisions, home lighting systems, and vehicles. Last Tuesday, Shawn Dubravac, Chief Economist of the Consumer Technology Association, said vocal computing is replacing the traditional graphical user interface, and "the ability to infuse AI into small things at relatively low cost is present." What do you think? Will the voice become a mainstream way to control our devices?

Posted in: Question of the Week, Data Acquisition, Sensors
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Biomarker Sensor System and Method for Multi-Color Imaging and Processing of Single-Molecule Life Signatures

NASA’s Jet Propulsion Laboratory offers a method to manufacture biomarker sensor arrays with nanoscale resolution and active regions on the order of 1 micron by applying nanolithographic direct-write techniques to the fabrication of Silane chemistry sensors on a transparent substrate. This novel technology enables extremely fine patterns of detectors suitable for multicolor imaging of single-molecule samples at resolutions far below the diffraction limit. The extremely small size of these sensors allows for rapid, highly specific screening for hundreds of functionalities within a single, small, integrated microfluidics chip.

Posted in: Briefs, White Papers, Sensors, Integrated circuits, Sensors and actuators, Biological sciences, Fabrication, Biomaterials
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Device and Method of Scintillating Quantum Dots for Radiation Imaging

Potential applications include medical imaging and aircraft inspection.

NASA’s Langley Re search Center has developed Scintillating Quantum Dots for Imaging X-rays (SQDIX) technology that enables the creation of x-ray detectors that are more sensitive than current x-ray detectors. In addition to superior sensitivity, SQDIX also offers the promise of reducing the cost of x-ray detectors by at least a factor of 10. Simply stated, SQDIX has the potential to change the way that x-ray detection is done.

Posted in: Briefs, Imaging, Sensors, Performance upgrades, Product development, X-ray inspections
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Lightning Protection and Detection System

An array of SansEC sensors can cover a selective area of the aircraft surface, providing both mitigation and damage sensing.

NASA’s Langley Research Center has developed a sensor technology for structural health monitoring on composite aircraft surfaces. When conventional aircraft are struck by lightning, the result can range from no damage to serious damage requiring extensive repairs that can take the airplane out of service for an extended period of time. The SansEC technology is a proven wireless sensing platform capable of measuring the electrical impedance of physical matter in proximity to the sensor based on a change in its resonance response. The sensor also exhibits a unique characteristic to disperse the lightning strike current to help mitigate lightning damage. In this application, an array of SansEC sensors will cover a selective area of the aircraft surface, providing both mitigation and damage sensing.

Posted in: Briefs, Aviation, Sensors, Aircraft structures, Sensors and actuators, Wireless communication systems, Vehicle health management, Composite materials, Lightning protection
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Advanced Gas Sensors and High-Temperature Pressure Sensors

This technology can be used for in situ leak detection, emissions monitoring, and pressure measurements.

Innovators at NASA’s Glenn Research Center have developed advanced hydrogen and hydrocarbon gas sensors capable of detecting leaks, monitoring emissions, and providing in situ measurements of gas composition and pressure. These compact, rugged sensors can be used to optimize combustion and lower emissions, and they are designed to withstand harsh, high-temperature environments (e.g., silicon carbide (SiC) sensors can operate at 600 °C). NASA Glenn is actively seeking industrial partners to develop and apply these cutting-edge sensors cooperatively in new applications.

Posted in: Briefs, Sensors, Hydrogen storage, Sensors and actuators, Emissions measurement, Hydrocarbons, Gases
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Minimally Intrusive Thin-Film Electrical Insulation on Conductive Surfaces

This innovation can be used to insulate conductive substrates prior to applying thin-film sensors such as strain gauges and thermocouples.

The use of thin-film sensors has several advantages over wire or foil sensors. For example, thin-film sensors do not require special machining of the components on which they are mounted, and, with thicknesses less than 10 μm, they are considerably thinner than wires or foils. The thin-film sensors are thus much less disturbing to the operating environment, and have a minimal impact on the physical characteristics of the supporting component.

Posted in: Briefs, Sensors, Sensors and actuators, Coatings, colorants, and finishes, Conductivity, Insulation
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Spinoff: Wireless Platform Integrates Sensors with Smartphones

The platform, developed using NASA nanotechnology, paved the way for interchangeable smartphone sensors.

In 2007, when the Department of Homeland Security (DHS) issued a call for a sensor that could equip a smartphone with the ability to detect dangerous gases and chemicals, Ames Research Center scientist Jing Li had a ready response. Four years earlier, she led a team that wrote a paper on the use of carbon nanotube sensors for gas and organic vapor detection.

Posted in: Articles, Aerospace, Manufacturing & Prototyping, Nanotechnology, Sensors, Sensors and actuators, Chemicals, Gases, Nanotechnology
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How New Angular Positioning Sensor Technology Opens A Broad Range of New Applications

A new generation of touchless position sensors solves a number of new problems while simplifying existing on-line control applications by providing design engineers with an opportunity to reduce implementation and maintenance costs. This technology can solve problems from measuring through materials to existing shaft alignment issues.

Posted in: White Papers, White Papers, Sensors
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Pedal Position Sensing in Heavy-Duty Vehicles

Pedal position detection is nothing new when it comes to operation of heavy duty equipment. However, the age old system operation of mechanical linkages between the pedal and the engine just might be coming to an end. New sensor technology is now enabling non-contact, drive-by-wire that can reduce total system cost while standing up to the harsh environments of off highway equipment.

Posted in: White Papers, Fluid Handling, Mechanical Components, Motion Control, Data Acquisition, Sensors
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