Piotr Pietrzak

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This paper presents the design and the practical realization of a measurement system dedicated to fast real-time multichannel registration of electronic system thermal response. The response is registered in parallel channels with a frequency up to 1 MHz. Such a high frequency is required for the thermal identification of electronic systems. The designed(More)
This paper describes a reliability evaluation method of a sensor in multi-sensor control systems, where communication between modules is based on a binary information. At the beginning, main objectives of the TULCOEMPA are briefly presented. One of the main tasks of this project is the Truck Recognition System that uses various types of sensors, which are(More)
The paper describes structure and operation principles of power supply system used for Truck Recognition System, which is a part of an advanced SHM installation on an iron-concrete bridge. The authors propose the application of their Energy Harvesting Controller cooperating with both solar cells and a wind generator. The controller enables efficient energy(More)
The following paper describes structure of the Wireless Vehicle Weight Measurement System (WVWMS), which will be applied in the TULCOEMPA project. The introduction delivers key project objectives and assumptions for designed subsystems. Subsequently, generic structure of Wireless Vehicle Weight Measurement System is presented, followed by detailed module(More)
The vibration measurement synchronization between wireless sensor nodes and with rotor revolution frequency of a supervised machine is necessary for diagnostic methods such as: operational modal analysis or operational shape deflection. This paper presents the review of existing methods for obtaining a discrete vibration signal whose sampling instants are(More)
The paper presents results of experimental and theoretical studies on small-size piezoelectric generators, in which energy of machine mechanical vibrations is harvested and converted to electric energy. These piezoelectric generators were proposed, as an alternative to a battery-based solution, for powering of sensor nodes in condition monitoring systems of(More)
BACKGROUND Determining the predisposition to vasospastic reactions in a function test is important at the earliest possible stage of diagnosis. Thermography is an acknowledged procedure for monitoring function tests; however, its availability is limited. The aim of this study was to compare the progression of the cold immersion test in a thermal picture and(More)