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In this paper, a data-driven multiblock concurrent projection to latent structures (CPLS) method is proposed for monitoring large-scale manufacturing lines, particularly for cold rolling continuous annealing processes (CAPs) fault diagnosis. The proposed method provides decentralized process monitoring and helps localize faults in both input variables and output variables concurrently. First, the...
Defect detection in metallic plates represents an important issue in metal industry, because its potential use in quality control process. Eddy current testing is one of the most extensively used nondestructive techniques for inspecting electrically conductive materials. The purpose of this paper is to present an eddy current testing system for surface defect detection in conducting materials using...
This paper discusses measurement of temperature on busbar connection based on contact resistance and plating material in relation to the value of contact resistance. This study is intended to prevent failure when busbar connection is attached. The failure of the electrical connection can occur due to bad contact so that the contact resistance is increased, high losses, overheating, and it can even...
For a kind of commercial MCCB, arc current, arc voltage, internal pressure of arc extinguish chamber, and arc moving images under different breaking conditions have been measured respectively, based on ATiS BE12 data acquisition system, pressure sensors and high-speed camera. Based on Kistler sensor and electromagnetic screen cover, an arc extinguish chamber internal pressure measuring method has...
In this paper, a prototype system was designed to efficiently measure the non-proportional electron response of scintillation materials using only angular information. Similar to other measurement systems used in this type of research, our design relies on the fundamental principles of Compton scattering. All current designs measure coincident events that arise when Compton electrons are deposited...
Nanocomposite materials are nowadays widely studied. It is often desired, by the addition of nanoparticles in an insulating matrix, to improve electrical and thermal properties. However, few types of nanoparticles enable improvement of combined electrical and thermal properties. Here the influence of the presence of graphene nanoparticles in an epoxy matrix on space charge accumulation is studied...
The study of electrical insulating materials can never be overemphasized. When these materials are subjected to either electrical or thermal stresses each one respond in a uniquely different way from one another. The response of insulating materials to its stressors is a stochastic process with varying dependent variables. The discovery of newer or composite insulating materials, having better electrical...
A new fault detection method for induction machines (IM) is analyzed with respect to transient magnetic material behavior by means of finite element (FE) modeling. The detection method uses the machines inverter to excite the IM with transient voltage pulses and measures the corresponding phase current responses. To account for the material behavior transient BH curves are identified from measurements...
There were carried out a research and results' analysis of switching properties of contacts made of Ag-W and Ag-W-Re consisting of 50% of Ag and 1-4% of Re. Contacts were made using powder metallurgy methods: Press-Sinter-Repress and Press-Sinter-Infiltrate method. Arc erosion tests, measurements of contact resistance change and contacts' tack welding tests were carried out in model testing conditions...
The work described in this conference talk follows up recent work on the development of a test for lack of field emission orthodoxy. There are three stages of discussion involved. First, the results of applying the test to 17 selected published FN plots are reported. About half fail the test, showing that related published field enhancement factor (FEF) values are unreliable. In several cases, this...
An interlaboratory study of shear wave speed (SWS) estimation was performed. Commercial shear wave elastography systems from Fibroscan, Philips, Siemens and Supersonic Imagine, as well as several custom laboratory systems, were involved. Fifteen sites were included in the study. CIRS manufactured and donated 11 pairs of custom phantoms designed for the purposes of this investigation. Dynamic mechanical...
The influence of water inside an insulating material (epoxy resin with Alumina filler) on volume resistivity, is investigated. This parameter is measured versus temperature. The water content within samples is adjusted using a climatic chamber, and monitored by weighing. Measurements show a large enhancement of volume conductivity versus water concentration and temperature. The impact of a temperature...
Effect of electron beam irradiation on dielectric properties in various insulating materials for spacecraft is investigated using PEA (Pulsed Electro-Acoustic) method. In space environment, spacecraft is exposed to plasma or radioactive-rays. In such condition, multilayer insulating materials covering the spacecraft are charged up. Sometimes the charge accumulation causes to the serious damage to...
The resistive switching (RS) effect is among the leading future non-volatile memory technologies; however, its implementation is hampered by the lack of full understanding of the switching and conduction mechanism. The switching is generally attributed to the formation and rupture of conductive filaments in the oxide, which are generated by temperature-enhanced nano-ionic and thermal effects. One...
Surface resistance measurements on insulating solids are usually performed by measuring the current induced when an electric field tangential to the surface is applied. The measured current results from the addition of currents flowing along the surface, and also partly in the volume. In this paper, surface current measurements on an alumina-filled epoxy resin are performed under varying conditions...
The measurement of low frequency noise can be considered as an important part in optimization of sensor noise-signal ratio. But sometimes, the intrinsic low frequency noise is affected by contact noise, which can be generated by geometrical defect of thin film. Thus, the measured noise level could not reveal material properties. We report different low frequency noise measurement methods in a general...
This paper presents the preliminary results of using silicon nanowires for the fabrication of electron detectors suitable for scanning electron microscopy. The rather small size of the device allows its location just close to the specimen, hence increasing the detected current with no need to a complex optical device. The results of material variation as well as preliminary results of morphology changes...
Insulation system is the backbone in any HV machine and as well as power system. However, degradation that always happens in the insulation system will reduce the lifespan of the machine. Thus, condition monitoring of the insulation system is highly recommended in order to maintain the reliability and efficiency of the machine during operation. Polarization and Depolarization Current (PDC) measurement...
Power Electronics on DCB are used for high power devices. There is a wide field of applications for such power electronic devices like converters or inverters for wind mills, solar parks or for electric and hybrid vehicles. High efficiency, long life time and increased power density are the major technical requirements for those devices. Especially the life time, but also the power density are limited...
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