Laser radar
Polos Attila
microlin at mail.datanet.hu
Mon Jun 28 13:33:27 CEST 1999
Hello
a doppler effektus
> keplettel kiszamolva, mintegy 0,0138 Hz a frekvencia
> eltolodas. Ahhoz, hogy ebbol legalabb egyetlen periodus
> kialakuljon, 1 perc 40 masodperc szukseges...
> Biztos igy mukodik a laser-es traffipax? :)
Nem. A kibocsajtott es a beerkezo jel faziseltolodasat merik.
Nem ertem, pedig szeretnem... A beerkezo jel fazisa esetleges.
Attol fugg, hogy egy hullamhosszon belul milyen tavol van a cel auto.
Pl a 300 kHz hullamhossza 1 km. Ha csak fel kilometerre van a cel
auto, pont ellentetes a visszavert jel fazisa, mintha 1 km-re lenne...
Hogy lehet akkor ezt felhasznalni fazis osszehasonlitgatasra?
Illetve, ha felhasznaljak, akkor a cel auto tavolsagat kapjak, nem a
sebesseget, nem?
Udv: Po:li
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