Retracted: Enhanced Military Spying Sonar Radar System using Ultrasonic Sensor Abstract: The use of electromagnetic waves for detection of different physical components such as distance, speed, ...

About Library for measuring distance with the HC-SR04 UltraSonic Sensor, by utilizing temperature correction and multiple echo pins in parallel.

A fully integrated 3-D ultrasonic fingerprint sensor-on-a-chip is presented. The device consists of a 110× 56 piezoelectric micromachined ultrasonic transducer (PMUT) array bonded at the wafer level ...