9762 papers found
For the development of novel technologies and high-precision manufacturing techniques in semiconductor and optics industries and in nanotechnologies, precise knowledge of the optical properties of these materials is vital, providing the foundation e.g. for novel nanoelectronic devices, high-quality sensors or effective photovoltaic elements.
In the Oil & Gas Industry, large fleets of centrifugal pumps are used for different services working in diverse process conditions. More specifically in oil refineries, they have many characteristics in common since they are centrifugal machines that handle liquids using the same operating principle and because their design is highly standardized by API 610/ISO 13709 std for centrifugal pumps and API 682 std for sealing systems. As well, operating units and refining processes are well known and do not differ much regardless of where they are installed. Due to their criticality in the...
Rather than representing a technological leap forward, Industry 5.0 actually nests the Industry 4.0 approach in a broader context, providing regenerative purpose and directionality to the technological transformation of industrial production for people-planet-prosperity [1]. Consequently, Industry 5.0 can be considered as the new engine of the economic and societal transition with a societal concept which can mean more distributed well-being with human-centric and sustainable, resilient industry. The advantage of the learning factory concept therefore lies in the combination of the realistic...
Nowadays production companies are in a difficult situation since batch sizes are decreasing, the number of product variants is growing, and the demand is difficult to forecast. New technologies enable to design more complex production systems capable of handling these challenges, but these “Industry 4.0 solutions” are often very expensive and hard to implement. In Bosch Power Tool Ltd. (Hungary), a flexible manufacturing concept was implemented, which enables to produce efficiently even with batch size one, requires much less space from the shop floor, prevents disruptions in production, and...
Rotor cage induction motors are widely used in the industry and their unpredicted shutdown can be very costly. Therefore, for safety and economic considerations, there is a need for identifying incipient faults. Among the induction motors faults, the rotor bar faults are among the most common failures. These generate sideband frequency components around the frequency of the power supply. The amplitudes of these sideband frequencies increase with the progression of the bar fault. Here we propose that the Recursive Matrix Pencil Method is able to track the growth of the sideband frequency...
Wearable technology in healthcare refers to medical devices for real-time monitoring of a wide variety of biomedical parameters of the human body. The Health 4.0 scenario has led to the rapid development of these systems in all fields of medicine. However, a wearable non-invasive device for skin health monitoring for skin hydration control or cancer prevention is still an open challenge. In this regard, this paper addresses the design and the implementation of a low-cost portable system for skin diagnostics purposes which is based-on microwave reflectometry technique. For this purpose, a...
In this work the problem of traceability of sensors used for intelligent mobility is addressed, in particular with reference to MEMS digital accelerometers. This topic is of great importance from the point of view of data reliability, and has significant implications in the field of safety. For this purpose, a rotating calibration bench is used to reproduce the conditions of use in the field, and the results are compared with calibration data obtained on linear type benches.
The no-clean flux-residues pose a high reliability risk, thus controlled strictly in the modern electronics assembly industry. A series of customized Surface Insulation Resistance (SIR) Experiments and AC impedance analysis under various test patterns demonstrate the dramatic impact of the partial activation of the fluxes unevaporated solvents, and non-decomposed activators on the reliability of the final assembly. Although the mainstream no-clean pastes and liquid fluxes are qualified under all the standard SIR and electrochemical migration (ECM) reliability tests, the solder mask filled...
MEMS-based Inertial Measurement Units (IMU) are becoming essential components in automotive applications, as well as in many other fields. However, current literature misses to extensively consider dynamic characterization of such devices under the actual operating conditions typical of the field of application. In this work, a specific test plan and a customized experimental setup have been developed in order to characterize the dynamic performances of low-cost IMU enduring a combined vibration stress. More in detail, the specific test plan is composed by two simultaneous stimuli: a...
The induction motors are a part of the bulk critical actuators in metallurgy, engineering and other industries. Generally, industries technological processes limit a redundancy of the critical actuators. Therefore, condition monitoring of the critical actuators parts is the basis of efficiency and reliability of the processes. In turn, the special operate conditions of the actuators, like unsteady speed and load, affects the motor condition monitoring success significantly. Induction motor rotor defects such as squirrel cage damage are minor but leads to unpredicted shutdown and greater...