Authors Mariusz Dawidowski, Anna Kulesza-Mincer, Waldemar Owczarek - Regional Office of Measures in Warszawa (Okręgowy Urząd Miar w Warszawie)
This article contains an overview of speedometers, dating back to 1906 when a stopwatch was introduced, which led to a more advanced solution such as speed recorder, telemobiloscope, radar and finally laser. The historical background as well as the mode of operation of the individual instruments are briefly outlined. The study also outlines the current rules for the validation of speedometers.
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