1800-tallets analoge spektrumanalysatorer / Fourier-analysatorer

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Hvem havde lige forestillet sig at Albert Michelson fra 1800-tallet designede flere analoge spektrumanalysatorer / Fourier-analysatorer:

17 Nov 2014, Pre-digital computer 'cranks out' Fourier Transforms. Boffins get a handle on pre-digital computer, restore it to working order:
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Citat: "... designer Albert Michelson ... As ?Engineer guy? Bill Hammack explains in the video below (third in his series), the machine operation is surprisingly simple: the user sets the wave they want analysed in the rocker bars of the machine and turns the crank. The pen outputs the coefficients - in other words, the sine waves (fundamental and harmonic) that make up the input function, and their relative amplitude. ... That limits it to analysing a waveform with 20 samples. However, as they note in the book, Michelson also constructed an 80-sample machine. ..."

Se fx:

(3/4) Analysis: Explaining Fourier analysis with a machine:

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(4/4) Operation: The details of setting up the Harmonic Analyzer:

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Fra serien:

(1/4) Intro/History: Introducing a 100-year-old mechanical computer:

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(2/4) Synthesis: A machine that uses gears, springs and levers to add sines and cosines:

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(3/4) Analysis: Explaining Fourier analysis with a machine:

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(4/4) Operation: The details of setting up the Harmonic Analyzer:

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Glenn

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Glenn
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Den tirsdag den 18. november 2014 07.43.37 UTC+1 skrev Jan Pedersen:

med mindre du vil bygge en eksakt kopi, er der ikke meget at bruge tegninge r til

-Lasse

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langwadt

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