Effect of Surface Unevenness on In Situ Measurements and TheoreticalSimulation in Non-Contact Surface Wave Measurements Using a RollingMicrophone Array
2015 (English)In: Proceedings of the 8th International Symposium on Non-Destructive Testing in Civil Engineering, NDT.net , 2015Conference paper (Refereed)
Non-destructive seismic testing using air-coupled microphones is today an attractive alternative to themore conventional stationary accelerometer testing, in order to perform fast and reliable material characterization onpavement structures. A multichannel microphone array enables fast mobile data collection using a rolling trolley. Itis essential that the microphone array and the material surface are perfectly aligned to receive a correct result. Thisstudy presents estimations of the calculation errors due to misalignments between the microphone array and thematerial surface. It is shown that even small misalignments can cause large errors. A realistic pavement roughness issimulated in order to quantify the errors in different situations and for different materials (stiffness). A simplesolution to correct the errors under certain circumstances is also presented.
Place, publisher, year, edition, pages
NDT.net , 2015.
Surface waves, surface unevenness, non-contact measurements, air-coupled measurements
IdentifiersURN: urn:nbn:se:kth:diva-193031OAI: oai:DiVA.org:kth-193031DiVA: diva2:974429
International Symposium on Non-Destructive Testing in Civil Engineering (NDT-CE)
QC 201609272016-09-262016-09-262016-09-27Bibliographically approved