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The acoustic camera as a tool to identify belt conveyor noises

100%

Bortnowski P. , Nowak-Szpak A. , Ozdoba M. , Król R.

Journal of Sustainable Mining

2020

tom Vol. 19, iss. 4

286--295

This paper explores the possibilities of using an acoustic camera as a tool that allows the verification of the correct construction and operation of individual elements of a belt conveyor. Based on the simultaneously recorded components - a video camera and measuring microphones, the sound pressure level map of the belt conveyor was created. The tests were carried out in laboratory conditions and covered the location and identification of individual noise sources. The verification consists not only of searching for dominant sound sources, but above all, of searching for frequencies in the analysed spectrum that should not occur during their proper operation. The tests allow for the identification of frequencies and the determination of the sound pressure level for three noise sources: the electric motor noise, the idler roll bearing noise as well as the noise on the tail pulley caused by belt misalignment.

Roller damage detection method based on the measurement of transverse vibrations of the conveyor belt

100%

Bortnowski P. , Król R. , Ozdoba M.

Eksploatacja i Niezawodność

2022

tom Vol. 24, no. 3

510--521

The article presents the detection of damage to rollers based on the transverse vibration signal measured on the conveyor belt. A solution was proposed for a wireless measuring device that moves with the conveyor belt along of the route, which records the signal of transverse vibrations of the belt. In the first place, the research was conducted in laboratory conditions, where a roller with prepared damage was used. Subsequently, the process of validating the adopted test procedure under real conditions was performed. The approach allowed to verify the correctness of the adopted technical assumptions of the measuring device and to assess the reliability of the acquired test results. In addition, an LSTM neural network algorithm was proposed to automate the process of detecting anomalies of the recorded diagnostic signal based on designated time series. The adopted detection algorithm has proven itself in both laboratory and in-situ tests.

Koncepcja badań taśmowego napędu pośredniego

100%

Bortnowski P. , Gładysiewicz L. , Król R. , Ozdoba M.

Transport Przemysłowy i Maszyny Robocze

2020

tom Nr 1

17--22

Przedstawiono stanowisko pomiarowe do badania sprzężenia ciernego w taśmowym napędzie pośrednim. Opisano układ pomiarowy i metodę wyznaczania siły tarcia przekazywanej z cięgna pędzącego do cięgna pędzonego. Siły tarcia nie można wyznaczyć z bezpośrednich pomiarów, a zatem konieczne jest przeprowadzenia badań wstępnych, mających na celu wyznaczenie oporów własnych stanowiska. W badaniach napędu pośredniego poszukiwana jest zależność przekazywanej siły tarcia od poślizgu pomiędzy współpracującymi ciernie cięgnami. Wstępne pomiary wskazują na konieczność zastosowania pomiarów prędkości liniowej taśmy o bardzo dużej dokładności.

A measuring bench dedicated for friction contacts in an intermediate conveyor belt is presented. The measuring system and method of determining the frictional force transmitted from the intermediate drive belt to the main conveyor belt are described. Frictional force cannot be determined from direct measurements. In this case, it is necessary to carry out research to determine the movement resistances of the test bench. The dependence of friction force and the slip between the cooperating belts is the current research area. Preliminary measurements indicate that the belt linear velocity has to be measured with the use of high accuracy measuring equipment.