Calibration Principle for Acoustic Emission Sensor Sensitivity

Xiao, Di; Zhang, Zhaona; Ren, Huiling; Ye, Bo; Pan, Qinxue; Xu, Chunguang

doi:10.1007/978-1-4939-1239-1_4

Cited by 5 publications

(2 citation statements)

References 3 publications

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“…This method does benefit from ease of set-up, reasonably good repeatability and the ability to handle long-duration signals of high-sensitivity (undamped or minimally damped) AE sensors. Commonly used AE sensors reverberate beyond 1 ms when free and often over 200 µs even coupled to a metal block, enlarging the needed size of a transfer block to inconvenient sizes of over 1 m. Recent papers [ 34 , 35 ] indicate renewed interest in this method and we will consider various aspects of the face-to-face procedures. However, it is suspected that the calibration unit is misconstrued in [ 34 ] regarding the velocity calibration, and their results are about 140 dB off the manufacturer’s calibration of the PAC R15 sensor.…”

Section: Introductionmentioning

confidence: 99%

Calibration Methods of Acoustic Emission Sensors

Ono

2016

Materials

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This study examined outstanding issues of sensitivity calibration methods for ultrasonic and acoustic emission transducers and provides workable solutions based on physically measureable quantities, laser-based displacement measurement in particular. This leads to mutually consistent determination of transmitting and receiving sensitivities of sensors and transducers. Methods of circumventing problems of extraneous vibrations on free transmitters are used, giving the foundation for face-to-face calibration methods. Working on many ultrasonic and acoustic emission transducers, their receiving and transmitting sensitivities are found to be always different, while their ratios exhibit unexpected similarity. This behavior is attributed to monopolar pulse generation and bipolar received signals due to electrical charge transfer during elastic wave motion and reflection on the back face. This is verified through a quantitative piezoelectric sensing experiment. Displacement vs. velocity calibration terminology is clarified, redefining the “V/µbar” reference for contact sensor calibration. With demonstrated differences in the transmitting and receiving sensitivities of transducers, the requirement of the Hill-Adams equation invalidates the basic premise of the currently formulated reciprocity calibration methods for acoustic emission transducers. In addition, the measured reciprocity parameter for the case of through-transmission significantly deviates from the approximate theoretical prediction. It is demonstrated that three methods provide reliable sensor calibration results that are complimentary among them.

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Section: Introductionmentioning

confidence: 99%

Calibration Methods of Acoustic Emission Sensors

Ono

2016

Materials

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“…This connection method ensured the working stability of the PZT patch and improved the convenience of the manufacturing process for the embedded composite transducer. The sensitivity of ECPT was verified with the face-to-face secondary calibration method (GB/T 19801-2005/ISO 12714:1999) [32][33][34]. The sensors were placed in the symmetry location to transmit and receive elastic waves from the solid medium surface-whereafter, the sensitivity of the sensor was calculated by the output signals.…”

Section: Specimensmentioning

confidence: 99%

Effect of Temperature on Ultrasonic Nonlinear Parameters of Carbonated Concrete

Zhao

Chen

et al. 2022

Materials

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In order to explore the monitoring technique of concrete carbonation in various temperatures, longitudinal ultrasonic nonlinear parameters of carbonated concrete are measured by using an embedded composite piezoelectric transducer (ECPT) and a surface-mounted transducer. The effect of temperature from −20 ∘C to 40 ∘C with a temperature interval of 5 ∘C and water–cement ratio on the measurements of ultrasonic parameters for carbonated concrete is investigated. The ultrasonic transmission detection method and the second harmonic generation (SHG) technique for longitudinal waves are used in the study. Results of the experiment demonstrate that ECPT is effective in the monitoring of the changes in ultrasonic parameters of carbonated concrete. At the temperature ranging from 15 ∘C to 40 ∘C, the increasing temperature slightly increases the relative nonlinear parameters of carbonated concrete. It decreases significantly that the relative nonlinear parameters of carbonated concrete measured at 0 ∘C compared with that at 10 ∘C. The configuration in this measurement is also appropriate for the assessment of carbonated concrete during carbonation time in low-temperature environments (below 0 ∘C). In the same carbonation time, the relative nonlinear parameters also increase slightly when the temperature is at −20 ∘C to 0 ∘C, but it does not change too much. Furthermore, there is a more significant variation of the nonlinear parameters in the same carbonation time for the specimens with a high water–cement ratio than that with a low one.

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Discussion on Elastic Wave Sources for AE Sensor Calibration at Low Frequency

Wang

Kang

2019

Springer Proceedings in Physics

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Calibration Principle for Acoustic Emission Sensor Sensitivity

Cited by 5 publications

References 3 publications

Calibration Methods of Acoustic Emission Sensors

Calibration Methods of Acoustic Emission Sensors

Effect of Temperature on Ultrasonic Nonlinear Parameters of Carbonated Concrete

Discussion on Elastic Wave Sources for AE Sensor Calibration at Low Frequency

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