Exist forms and criticalities of disfigurements of marine engines were studied from main propulsive engine, auxiliary facility and hull. Eddy current Non-destructive testing method was brought forward to disfigurement inspection of marine engines with advantages such as celerity and nicety. Cracks, as one form of disfigurements, testing of marine engines were demonstrated in detail, and the dev...

A hybrid system which combines Self Organizing Maps and Case Based Reasoning is presented and apply to Structural Assessment. Self Organizing Maps are trained as a classification tool in order to organize the old cases in memory with the purpose of speeding up the Case Based Reasoning process. Three real structures have been used: An aluminium beam, a pipe section and a long pipe.

The opening paper of this symposium was dedicated to an overview of the existing state of the practice and the advantages and limitations of non-destructive testing methods for the evaluation of historic materials of construction. The methods discussed in this paper include the state of the practice in visual, rebound, penetration, and ultrasound methods, as well as the physical measurement of ...

Synthetic Aperture Focusing Technique imaging has became a popular tool in the field of non-destructive testing in the past years. The acquisition procedure consists in collecting the data after activating elements one by one. The reconstructed object is then computed by adding the contribution of each channel, selecting the proper time delay values. It is the principle of the well-known delay ...

In order to get, at the ultrasonic receiver input, a clear echo pulse, it is very important to apply on the transducer a short high amplitude pulse (hundreds of volts). The pulse frequency is low enough to allow the reception and processing of the informations received from the analysed material between two adjacent pulses, but high enough to ensure an integral control of the material. The piez...

Tea colour determination during fermentation is a vital problem in the tea industries. The human experts have been traditionally measuring change of colour during fermentation by picking up some amount and observing the colour by eye approximation. Methods are also available for analyzing the formation of colour constituents during fermentation. Another method uses colorimeter for determining t...

Articles you may be interested in Design, analysis and testing of a parallel-kinematic high-bandwidth XY nanopositioning stage Rev. A macroscopic non-destructive testing system based on the cantilever-sample contact resonance Rev. Scale-dependent vibration analysis of prestressed carbon nanotubes undergoing rotation

This paper describes the integration of an ultrasonic-based non-destructive testing (NDT) with wireless sensor networks (WSNs) to continuously monitor material integrity during run-time. NDT is a technique that allows the examination of material properties without causing any damage to the material in the process. A wireless sensor network facilitates the collaborative effort to monitor a certa...

Abstract Within the German Cluster of Excellence "Integrative Production Technology for High-Wage Countries", at the RWTH Aachen University, self-optimising production systems are investigated. Within this scope, the weaving process is analyzed. Weight per area is a major product quality of woven fabrics. Integration of sensors into the loom to monitor and control the weight per unit area is in...

There are several rapidly developing non-destructive physical methods that are increasingly used for the analysis and assessment of art objects. These technologies are posed to bring about drastic changes in the attribution and inventory characterization procedures carried out by museums, private collections, art dealers, and art community as a whole. Certainly today nondestructive evaluation (...