High speed film testing of agricultural machines requires specialized equipment. This equipment consists of cameras capable of advancing film between 16 and 10.000 frames per second. Higher camera speeds are essentially not necessary for testing of agricultural machines. Cameras filming at speeds of up to 6.500 frames per second are most common in Poland. These cameras are of East European, British and Japanese manufacture, e.g. Pentazet 16 and Pentazet 16 A, manufactured in East Germany; Locam and Hyspeed, manufactured in England; and Himac 16, manufactured in Japan. Proper high speed camera testing of agricultural machines requires construction of camera stations and stations for the filmed objects. The stations are essential in order to provide proper lighting, a prerequisite to obtain technically correct film. As a rule, natural lighting alone is not sufficient, photographic spotlights and - even more portable and more effective - iodine-quartz lamps are needed, particularly when filming at speeds in excess of one thousand frames per socond, even for 27 DIN film. Appropriate light meters must be used for high speed filming. Cameras provide film material for research. This film must be analyzed both qualitatively and quantitatively. Qualitative analysis is done using 16 mm film editing tables and projectors. Most appropriate are freeze-frame projectors capable of advancing film both forward and back, also one frame at a time. Special analyzer-projectors, such as the British Specto MK III, the Swiss Bolex 521, or, even better, the electronic analyzer of the Vanguard Motion type, or other analyzer-projectors are required for quantitative analysis of film material. Quantitative analysis done by hand by the researcher himself, or herself, using film analyzer-projectors do not ensure objective quantitative analysis, thus producing nonobjective research results. Nonetheless, such analysis provides adequate overview and general trends, allowing the researcher to advance specific conclusions. Such analysis does not destroy the research film material and this material may, in the future, be repeatedly analyzed using, for example, electronic or computer techniques.
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.