Sound field mapping using automated delta kinematics

Research output: Contribution to book/Conference proceedings/Anthology/ReportConference contributionContributedpeer-review

Contributors

Abstract

Fiber-reinforced plastics not only have a high lightweight construction and application potential, but also offer the possibility of integrating actuators and sensors into a structural component. Latest research shows the suitability of an in-situ embedding of piezo-ceramic actuator arrays in fiber-reinforced thermoplastic composites for serial production. This may enable highly integrated systems for distance or flow measurement e.g. in automotive or industrial applications. These measuring systems are based on the generation of plate waves and thus, the emission of ultrasonic waves in air and their subsequent coupling back into the structure. Therefore, the aim of this paper is the presentation of an automated measuring and evaluation method for the determination of ultrasonic waves in air generated by a complex shaped active fiber-reinforced composite structure. Basic components of the measuring system are a microphone for the measurement of the radiated sound and a kinematic system, which enables an automated three-dimensional positioning of the microphone. Based on a profound preliminary analysis, a preferred variant based on a delta kinematic system was designed and implemented. The control of the positioning system and the coupling with an existing acoustic measuring system was challenging. Thus, a program for sound wave detection and evaluation was developed, which enables the detection and processing of the data automatically. This contribution shows that a delta kinematic system delivers the best repeat accuracy for positioning of the microphone. A point-by-point travel strategy avoids distortion of the sound field compared to static array microphones. Thus, the presented system was developed to characterize the sound field of complex curved structures. Due to the high degree of automation, the system can be operated with little effort. The entire measuring system is designed for low manufacturing costs in order to guarantee even SMEs access to quality-relevant measuring technology for future production.

Details

Original languageEnglish
Title of host publicationAdvances in Acoustics, Noise and Vibration – 2021
EditorsEleonora Carletti, Malcolm Crocker, Marek Pawelczyk, Jiri Tuma
Place of PublicationGliwice (Poland)
PublisherSilesian University Press
ISBN (electronic)978-83-7880-799-5
Publication statusPublished - 2021
Peer-reviewedYes

Conference

Title27th International Congress on Sound and Vibration, ICSV 2021
SubtitleAdvances in Acoustics, Noise and Vibration
Abbreviated titleICSV 27
Conference number27
Duration11 - 16 July 2021
Website
Locationonline
CityPrag
CountryCzech Republic

External IDs

Scopus 85117446043
ORCID /0000-0003-2834-8933/work/142238258
ORCID /0000-0002-8854-7726/work/142242063

Keywords

Keywords

  • Acoustic measurement, Automated measurement system, Sound field mapping, Ultrasonic air borne sound wave propagation, Delta kinematic system