Engineering

Using smart sensor technology in building design

Have lights turned on automatically when you walk into a room? Does the air conditioner in the conference room turn on when a certain number of people enter the room?

Engineering

GymCam tracks exercises that wearable monitors can't

Wearable sensors such as smartwatches have become a popular motivational tool for fitness enthusiasts, but gadgets do not sense all exercises equally. Researchers at Carnegie Mellon University have found that a stationary ...

Engineering

A finger on the pulse of sensor developments

Once upon a time, fingerprint sensors were only associated with law enforcement and corporate security. Now, they've become so commonplace that they are even used in mobile phones. The biometric technologies found in such ...

Engineering

World's first metal 3-D-printed bridge enters test phase

The Netherlands will be testing the first metal 3-D-printed bridge in the world. Plans are to insert this bridge in its permanent location in Amsterdam at the start of 2020. The Dutch company MX3D produced the bridge after ...

Engineering

Tracking down polluters

Proving criminal machinations can be difficult—for instance when those involved covertly discharge hazardous wastewater into sewers. A new sensor system developed by Fraunhofer researchers and their partners could soon ...

Engineering

Monitoring bridge safety with wireless sensors

Tens of thousands of bridges across the country are deteriorating, creating potentially dangerous conditions. Particularly after a natural disaster, being able to assess a bridge's structural integrity can be critical.

Engineering

A biocompatible magnetic skin that could enable new wearable systems

Researchers at King Abdullah University of Science and Technology have recently developed a flexible and imperceptible magnetic skin that adds permanent magnetic properties to all surfaces to which it is applied. This artificial ...

Robotics

Giving smart vehicles their sense of direction

Scientists around the world are racing to develop self-driving vehicles, but a few essential components have yet to be perfected. One is localization—the vehicle's ability to determine its place and motion. Another is mapping—the ...

Engineering

A battery-free sensor for underwater exploration

To investigate the vastly unexplored oceans covering most our planet, researchers aim to build a submerged network of interconnected sensors that send data to the surface—an underwater "internet of things." But how to supply ...

Engineering

Wearable sensors detect what's in your sweat

Needle pricks not your thing? A team of scientists at the University of California, Berkeley, is developing wearable skin sensors that can detect what's in your sweat.

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Sensor

A sensor is a device that measures a physical quantity and converts it into a signal which can be read by an observer or by an instrument. For example, a mercury thermometer converts the measured temperature into expansion and contraction of a liquid which can be read on a calibrated glass tube. A thermocouple converts temperature to an output voltage which can be read by a voltmeter. For accuracy, all sensors need to be calibrated against known standards.

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