Design and construction of short pulse ultrasonic probes for non-destructive testing

Low, G.C.; Jones, Rhys Vaughan

doi:10.1016/0041-624x(84)90026-x

Cited by 14 publications

(2 citation statements)

References 20 publications

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“…The ultrasonic transducer and test surface are submerged in a bath of couplant (usually de-gassed or distilled water). The IO and 40 MHz transducers employed in this work were designed and constructed in this department at Aberdeen (Low andJones 1984, Penny andPlayer 1989) and are all broadband plane compressional wave devices with 10 mm diameter lead metaniohate (LMN) elements showing good pulse characteristics and low resonance.…”

Section: Experimental Systemmentioning

confidence: 99%

Enhanced surface parametrization using maximum entropy signal processing of ultrasonic pulses

Smith

Player

1991

Meas. Sci. Technol.

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The authors have shown previously that the maximum entropy method (MEM) forms a valuable tool for assisting in the estimation of surface amplitude distributions from reflected ultrasonic pulses. The surface inspection technique is extended to allow the determination of many common surface texture parameters from the amplitude distribution function. Using relatively accessible ultrasonic frequencies, surfaces in the practically important region of around 2 mu m to over 140 mu m roughness (Ra) are assessed. The MEM is used as a high-performance deconvolution technique to produce height amplitude distribution graphs with good resolution and low noise. From these graphs surface parameters such as Ra and Rq can be extracted. Three different types of machined surface and one layered surface are tested. In the latter two cases, the MEM is extended to allow negative points in its deconvolution image; the advantages of this move are described. Results from the use of 10 MHz and 40 MHz broadband plane compressional wave transducers are compared with those from a stylus instrument; good agreement is obtained. The difficulties of producing reliable results by both methods are summarized.

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Section: Experimental Systemmentioning

confidence: 99%

Enhanced surface parametrization using maximum entropy signal processing of ultrasonic pulses

Smith

Player

1991

Meas. Sci. Technol.

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“…The primary problems encountered are again those of the inadequate bandwidth of commercial probes and selection of the optimum procedure for estimating the flaw centroid from the low frequency scattering data. Special transducers have been developed to reduce the former problems (17) and a formal protocol for centroid determination is under evaluation.…”

Section: Research Evaluationsmentioning

confidence: 99%

Status of Implementation of the Inverse Born Sizing Algorithm

Thompson

1985

Review of Progress in Quantitative Nondestructive Evaluation

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Electrical tuning for sensitivity enhancement of a piezo-electric ultrasonic transducer: Simulation and fabrication

et al. 2020

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Design and construction of short pulse ultrasonic probes for non-destructive testing

Cited by 14 publications

References 20 publications

Enhanced surface parametrization using maximum entropy signal processing of ultrasonic pulses

Enhanced surface parametrization using maximum entropy signal processing of ultrasonic pulses

Status of Implementation of the Inverse Born Sizing Algorithm

Electrical tuning for sensitivity enhancement of a piezo-electric ultrasonic transducer: Simulation and fabrication

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