| The paper deals with experimental monitoring system, developed by the authors, by using a microcontroller within the 8051 family, Dallas DS87C550. This micro-system has two main parts: the acquiring and transfer module and the user interface developed using the facilities specific to Graphic User Interface of Matlab®. The achievement such a way implies designing a hardware structure that meets the proposed functions in a versatile approach and programming of controller using its facilities. The electrical equipments, being characterized by small time constants and high risk, impose major efforts in orderto develop competitive monitoring systems. On the other hand, the costs involved by such systems need to be as low as possible, without cutting the imposed performances. The possible functions of the experimental system are related to the monitoring of IO breaker using modern diagnostic methods: monitoring of the contacts condition, the computation equivalent switching number, the estimation of the insulating oil quality, monitoring the achieved service, the diagnostics of the weaken contact by vibration analysis technique and the dependence of voltage versus temperature on contact. The results are presented as graphical user interfaces developed by using the facilities of the software MATLAB. The interface is versatile and with ease allows the tracking of results after data processing. |
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