A method based on Fisher Information from sensitivity matrix is presented for sensor placement in nondestructive tests used for parameter estimation and structural model updating using sparse and noisy measurements. This method can be used for both static and modal nondestructive tests but in this paper sensor placement for only the static nondestructive data is presented. An error function tha...

A nondestructive inspection of a Mangosteen, Fruit, inside is an essential way for a fruit grading. In this paper, we proposed a nondestructive 2D cross-sectional visualization of Mangosteen using infrared and a method for grading a Mangosteen. The infrared was selected because there is no effect against taste and consumer health. By experiments, the infrared in the frequency range of 850 and 1...

BACKGROUND In cell-based therapies, in vitro studies on biomimetic cell-scaffold constructs can facilitate the determination of the cell dose, a key factor in guaranteeing the effectiveness of the treatment. However, highly porous scaffolds do not allow a nondestructive evaluation of the cell number. Our objective was to develop a nondestructive method for human mesenchymal stem cells dose eval...

To establish fast, nondestructive, and inexpensive methods for resistivity measurements of SiC wafers, different resistivity-measurement techniques were tested for characterization of semi-insulating SiC wafers, namely, the four-point probe method with removable graphite contacts, the van der Pauw method with annealed metal and diffused contacts, the current-voltage (I-V) technique, and the con...

Stabilized mixes are used in the construction of bearing layers in asphalt and concrete pavement structures. Two nondestructive methods: resonant frequency method and ultrasonic pulse velocity method, were used for estimation of elastic properties of fly ash-stabilized mixes. Stabilized mixes were designed containing sand from the river Drava and binder composed of different share of cement and...

It has been proved by experiments that the metal magnetic memory (MMM) NDT method can effectively detect the stress concentration of ferromagnetic metal parts. But it is still hard to evaluate the stress concentration quantitatively because of the confusion in the mechanism of MMM method. In this paper experiments are designed and carried out to investigate the relationship between the MMM sign...

Abstract This paper summarizes the research status of nondestructive testing technology building structures, focuses on technical principles and characteristics first wave phase inversion method impact elastic method, this basis, detector based reversal were used to conduct experimental cracks, materials, defects thickness test block. The results show that has low requirements for environment, ...