Polyvinylidene fluoride (PVDF), a material with ferroelectric characteristics, is still extremely
topical for the manufacturing of transducers, and different examples, some of which have …

Current ultrasonic Local Positioning Systems (LPS) based on an infrastructure of beacons
can provide centimeter-level accuracy employing the spread spectrum technique, which …

In this article, a time-of-flight detection technique in the frequency domain is described for an
ultrasonic Local Positioning System (LPS) based on encoded beacons. Beacon …

This work presents a novel hyperbolic algorithm to compute the absolute position of a
mobile node (tag) in a Local Positioning System (LPS) based on the transmission of …

Underwater acoustic transducer based on high piezoelectric phase volume fraction, large
thickness, large area and curved piezoelectric composites (PC) possess wider beam width …

This paper presents a low-cost, wideband ultrasonic transmitter for in-air ultrasonic
applications based on a conventional narrowband piezoceramic transducer with an LR …

An electromechanically actuated electret-based loudspeaker made with an organic material
membrane is presented, which is small in volume, extremely thin, and lightweight for light …

Aim to increase the horizontal and vertical beam width of the high frequency transducer
simultaneously, we present a doubly-curved 1-3 piezoelectric composite element. It consists …

Accurate distance estimation is a key part for certain active sensing systems as ultrasonic
Indoor Positioning Systems (IPSs). In these systems, receive filters play a key role for the …

This paper presents a new algorithm to obtain the position of a mobile with an ultrasonic
local positioning system (US-LPS). The system consists of five beacons placed in the ceiling …