Tags

Type your tag names separated by a space and hit enter

On the Piezoelectric Detection of Guided Ultrasonic Waves.
Materials (Basel). 2017 Nov 18; 10(11)M

Abstract

In order to quantify the wave motion of guided ultrasonic waves, the characteristics of piezoelectric detectors, or ultrasonic transducers and acoustic emission sensors, have been evaluated systematically. Such guided waves are widely used in structural health monitoring and nondestructive evaluation, but methods of calibrating piezoelectric detectors have been inadequate. This study relied on laser interferometry for the base displacement measurement of bar waves, from which eight different guided wave test set-ups are developed with known wave motion using piezoelectric transmitters. Both plates and bars of 12.7 and 6.4 mm thickness were used as wave propagation media. The upper frequency limit was 2 MHz. Output of guided wave detectors were obtained on the test set-ups and their receiving sensitivities were characterized and averaged. While each sensitivity spectrum was noisy for a detector, the averaged spectrum showed a good convergence to a unique receiving sensitivity. Twelve detectors were evaluated and their sensitivity spectra determined in absolute units. Generally, these showed rapidly dropping sensitivity with increasing frequency due to waveform cancellation on their sensing areas. This effect contributed to vastly different sensitivities to guided wave and to normally incident wave for each one of the 12 detectors tested. Various other effects are discussed and recommendations on methods of implementing the approach developed are provided.

Authors+Show Affiliations

Department of Materials Science and Engineering, University of California, Los Angeles (UCLA), Los Angeles, CA 90095, USA. ono@ucla.edu.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

29156579

Citation

Ono, Kanji. "On the Piezoelectric Detection of Guided Ultrasonic Waves." Materials (Basel, Switzerland), vol. 10, no. 11, 2017.
Ono K. On the Piezoelectric Detection of Guided Ultrasonic Waves. Materials (Basel). 2017;10(11).
Ono, K. (2017). On the Piezoelectric Detection of Guided Ultrasonic Waves. Materials (Basel, Switzerland), 10(11). https://doi.org/10.3390/ma10111325
Ono K. On the Piezoelectric Detection of Guided Ultrasonic Waves. Materials (Basel). 2017 Nov 18;10(11) PubMed PMID: 29156579.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - On the Piezoelectric Detection of Guided Ultrasonic Waves. A1 - Ono,Kanji, Y1 - 2017/11/18/ PY - 2017/10/24/received PY - 2017/11/08/revised PY - 2017/11/15/accepted PY - 2017/11/22/entrez PY - 2017/11/22/pubmed PY - 2017/11/22/medline KW - Lamb waves KW - acoustic emission KW - detector calibration KW - guided ultrasonic waves KW - receiving sensitivity JF - Materials (Basel, Switzerland) JO - Materials (Basel) VL - 10 IS - 11 N2 - In order to quantify the wave motion of guided ultrasonic waves, the characteristics of piezoelectric detectors, or ultrasonic transducers and acoustic emission sensors, have been evaluated systematically. Such guided waves are widely used in structural health monitoring and nondestructive evaluation, but methods of calibrating piezoelectric detectors have been inadequate. This study relied on laser interferometry for the base displacement measurement of bar waves, from which eight different guided wave test set-ups are developed with known wave motion using piezoelectric transmitters. Both plates and bars of 12.7 and 6.4 mm thickness were used as wave propagation media. The upper frequency limit was 2 MHz. Output of guided wave detectors were obtained on the test set-ups and their receiving sensitivities were characterized and averaged. While each sensitivity spectrum was noisy for a detector, the averaged spectrum showed a good convergence to a unique receiving sensitivity. Twelve detectors were evaluated and their sensitivity spectra determined in absolute units. Generally, these showed rapidly dropping sensitivity with increasing frequency due to waveform cancellation on their sensing areas. This effect contributed to vastly different sensitivities to guided wave and to normally incident wave for each one of the 12 detectors tested. Various other effects are discussed and recommendations on methods of implementing the approach developed are provided. SN - 1996-1944 UR - https://www.unboundmedicine.com/medline/citation/29156579/On_the_Piezoelectric_Detection_of_Guided_Ultrasonic_Waves_ L2 - http://www.mdpi.com/resolver?pii=ma10111325 DB - PRIME DP - Unbound Medicine ER -
Try the Free App:
Prime PubMed app for iOS iPhone iPad
Prime PubMed app for Android
Prime PubMed is provided
free to individuals by:
Unbound Medicine.