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Luminaires for outdoor use are subject to a great number of environmental agents that can generate stress conditions on the device and affect their reliability performance. Typical examples of environmental factors are temperature, rain, humidity, solar radiation, vibrations, etc., or a combination of these. The aim of this work focuses on vibration stress to which a luminaire can be subject in its...
In this paper a new procedure to validate the electromedical instrumentation during the first phases of the design is proposed. In particular, the thermal behavior and reliability performances of a fundamental unit of a medical ultrasound instrument are discussed. Being the system taken into account complex, the transmitter-receiver unit of an echographic instrument is considered as equipment under...
Mechanical stresses, as vibrations, are the main common types of solicitation to which electronic equipment can be subjected during its useful life. For this reason drop or shock tests become important for such device; the use of a shaker system, able to produce sinusoidal and random vibrations, can simulate the operating conditions in a less expensive and faster way. In this paper the planning and...
In this paper the results from a study of high-voltage pulse stressing effects on ultrasound array transducers are presented. The ultrasound transducers have been implemented with a new Pb-free soldering technology, using Silver Electrically Conductive Adhesive. The conductive adhesive have been used among the platelet of piezoelectric and fingers of connection for the implementation of phased array...
In this work two solutions (coaxial cable and optical fiber) of receiver chains for the new SKA radiotelescope are evaluated by their reliability performance in their operating environment. In the case of the most reliable solution (optical fiber), other reliability test have been performed and their results are here reported.
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