Analysis of adaptive imaging algorithms for ultrasonic non-destructive testing

Kažys, R.; Svilainis, Linas

doi:10.1016/0041-624x(95)92035-3

Cited by 4 publications

(4 citation statements)

References 6 publications

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“…For that contact point type transducers with a hemispherical plastic tip and with 180 kHz resonant frequency were exploited. Experiments were performed using a scanner Standa 8MTF-75LS05 (Standa Ltd., Vilnius, Lithuania) and the ultrasonic measurement system “Ultralab” [ 27 ] ( Figure 6 ). All units including the ultrasonic transducers and the ultrasonic system “Ultralab” were developed at Ultrasound Research Institute of the Kaunas University of Technology.…”

Section: Experimental Verificationmentioning

confidence: 99%

Simultaneous Measurement of Thickness and Elastic Properties of Thin Plastic Films by Means of Ultrasonic Guided Waves

Kažys

Tumšys

2021

Sensors

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Ultrasonic guided waves are already used for material characterization. The advantage of these waves is that they propagate in the plane of a plate and their propagation characteristics are sensitive to properties of the material. The objective of this research was to develop an ultrasonic method that could be used to measure the properties of thin plastic polyvinylchloride films (PVC). The proposed method exploits two fundamental Lamb wave modes, A0 and S0, for measurement of a thin film thickness and Young’s modulus. The Young’s modulus is found from the measured phased velocity of the S0 mode and the film thickness from the velocities of both A0 and S0 modes. By using the proposed semi-contactless measurement algorithm, the Young’s modulus and thickness of different thickness (150 µm and 200 µm) PVC films were measured. The uncertainty of thickness measurements of the thinner 150 µm PVC film is 2% and the thicker 200 µm PVC film is 3.9%.

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Section: Experimental Verificationmentioning

confidence: 99%

Simultaneous Measurement of Thickness and Elastic Properties of Thin Plastic Films by Means of Ultrasonic Guided Waves

Kažys

Tumšys

2021

Sensors

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“…From the above analysis it can be seen that the stenciling system hardware control mode is characterized by (1) The hardware control circuit structure of the stenciling system is relatively complicated, but the processing is speedy, and no computer processing time is used.…”

Section: The Hardware System Analysis Of the Stenciling Controlmentioning

confidence: 99%

“…From the above analysis, the software-controlled methods are: first the host computer gives the delay time based on the detection speed. Assumed that the first channel needs 20s delay time, and the accuracy is 0.1s, to make the delay time [1]. Delay Control to maximum, ie 199, then doing spray, the detailed flow chart 2 is shown in Fig.…”

Section: Software System Analysis Of the Stenciling Controlmentioning

confidence: 99%

“…When the instrument detects the signal, how to automatically mark at the place of the defect is one of the important issues of automatic flaw detection. During the horizontal movement of the sector-led probe and stenciling device on the gantry, once the defect is found, the detection system will notify the spray system to operate [1] . Because of the mechanical structure characteristics of the ultrasonic detection device (Figure 1), the spray gun is normally mounted at the rear of the probe holder, which can avoid complex mechanical structure.…”

Section: Introductionmentioning

confidence: 99%

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A Stenciling Delay System for Steel Plate Ultrasonic Flaw Detection Process

Wang

2011

AEF

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Abstract:In the process of steel plate ultrasonic flaw detection, once the instrumentation discovers the flaw, a sign is stenciled in the vertical direction of the flaw, because there is a distance between the detector and stenciling, an effective method must be applied to reasonably control the stenciling, in order to achieve the precise stenciling. Based on characteristics of the steel plate flaw detection process, the delay distance between each group of detectors and stenciling has been analyzed, simultaneously based on the flaw detection speed, stenciling delay data has obtained. Stenciling delay structure is developed using the computer software technique, instead of hardware control mode, software algorithm is carried out to design, which has achieved the goal of convenience application and precise orientation.

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