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In this paper different methods for determining some dynamic parameters like longitudinal accelerations of cars are presented. The studies were conducted at different road intersections in Ruse, Bulgaria. Data of accelerating cars in real traffic flow with non-contact equipment, VBOX GPS Data Logger measurement system has been acquired. This study can be used by the experts in forensic accident investigation of vehicles. The data presented in this article can improve the calculations accuracy and the quality of expertise during the accident investigation.

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The paper presents investigation of the temperature and heating velocity during rebuilding (reconditioning) of worn-out agricultural machinery parts by automatic electric arc weld deposition. The temperature has been measured in a control section located at exact distance from the deposited coatings in order to study heating in areas of the parts which don’t need to be treated. The obtained graphical results for the specified parameters are used to select an appropriate scheme for the implementation of the process, from the point of view of reducing the thermal influence on the rebuilt machine parts.