Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Znaleziono wyników: 3

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: measurement by laser beam

Sortuj według:

Ogranicz wyniki do:

Wear estimation of current collector contact strips by analysis of a 3D scanning results

Jarzębowicz L., Judek S.

Computer Applications in Electrical Engineering

2013

Vol. 11

336--344

The technical condition of current collector contact strips is very important when operational reliability of railway transportation is considered. The authors proposed a novel measurement system based on a 3D camera to register the shape and dimensions of the current collector contact strips surface. The system was installed above the railway track for tests in target ambient. During the trial operation a few dozen of contact strips 3D-profiles were recorded for the locomotives which passed the test point. The collected results vary widely, particularly with regard to the position and tilt of the obtained profiles. This variety makes the surface analysis more complex. Therefore, an automatic method for normalization of the registered profiles was introduced. Standardized profiles are compared with the pattern of a new contact strip in order to estimate their wear. Summary of scanning and analysis results confirm the possibility of commercial use of the introduced system.

3D-scanning system for railway current collector contact strips

Judek S., Jarzębowicz L.

Computer Applications in Electrical Engineering

2013

Vol. 11

328--335

Undisturbed collection of current from a contact wire of the catenary constitutes one of the basic elements in reliable operation of electrified rail transport, particularly when vehicles move at high speed. Quality of current collection is influenced by the construction of catenary and current collectors, as well as by the technical condition and regulation of these two elements. Total contact force of a current collector head on contact line and the condition of contact strip surface determine the quality of the contact between a current collector and contact line. This paper presents an innovative stand for diagnosing contact strips on current collectors with the use of 3D imaging technique. The stand has been tested in laboratory and during trial exploitation on a railway line. Implementation potential of the proposed method has been confirmed.

Portable low uncertainty calorimetric standard for energy unit of pulse laser radiation

Skrzeczanowski W., Owsik J., Długaszek A., Janucki J., Nowakowski M., Zarwalska A.

Journal of Technical Physics

2001

Vol. 42, no 4

475-483

New instrument for metrology applications in measurements of laser pulse energy is presented. Due to its parameters it can be used as a standard for unit of energy of pulse laser radiation. The instrument consists of a control unit, three different sources of laser radiation, two receivers of optical signal, and a laptop. The whole system can be easily transported enabling one to carry out measurements in situ, at customers, not only in laboratory conditions. A method of measurement used in operation of the standard is described. Main characteristics of the standard are shown. Methods of calculation of uncertainties of measurement during laser energy meters calibration by means of our standard are also presented.