Ultrasonic sensors measure the distance between a target and the sensor using high-frequency sound waves that are inaudible to humans. The process is simple: the sensor emits ultrasonic waves, which ...

The Northgate Link Extension light-rail tunnel, currently under construction in Seattle, includes RFID sensors built into some concrete liners to detect strain and help monitor each liner’s integrity ...

Although ultrasonic sensors have been around for several decades, their popularity in sensing applications continues due to their capability, flexibility and relatively low cost. Products like ...