 |
Conference papers
Car glab microphones using piezoelectric transducers for external alarm detection and localization
Abstract : This work describes the potential use of car windows as a long range acoustic sensing device for external alarm signals. The goal is to detect and localize siren signals (e.g. ambulances and police cars) and to alert presbycusic drivers of its presence by visual and acoustic feedback in order to improve individual mobility and increase the sense of security. The glab panes of a Renault Zoé operating as an acoustic antenna have been equipped with large 50 mm outer diameter piezoceramic rings, hidden in the lower part of the door structure and the lower part of the windshield and the rear window. The response of the glab to quasi-static signals and sweep excitation has been recorded. In general, the glab pane is acting as a high pab filter due to its inherent stiffneb and provides only little damping. This effect is compensated by using a charge amplifier electronic circuit. The detection capability up to 120 m as well as a dynamic test where the car is moving towards the sound source is reported.
Keywords :
Piezoelectricity
Security systems
Signal detection
Signaling
Smart sensors
Transducers
Acoustic antennas
Acoustic feedback
Alarm detection
Charge amplifiers
Detection capability
Individual mobility
Piezoceramic rings
Sound localization
Piezoelectric transducers
Piezoelectric ceramics
Microphones
Embedded systems
Automobile safety devices
Amplifiers (electronic)
Alarm systems
Actuators
https://hal-cea.archives-ouvertes.fr/cea-01841679
Contributor : Léna Le Roy Connect in order to contact the contributor
Submitted on : Tuesday, July 17, 2018 - 2:35:53 PM
Last modification on : Monday, December 13, 2021 - 9:16:27 AM
Contributor : Léna Le Roy Connect in order to contact the contributor
Submitted on : Tuesday, July 17, 2018 - 2:35:53 PM
Last modification on : Monday, December 13, 2021 - 9:16:27 AM