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Polskie Centrum LabVIEW • Zobacz wątek - Wejścia analogowe w myRIO

Wejścia analogowe w myRIO

Tematy związane z LabVIEW pracującym w czasie rzeczywistym.

Wejścia analogowe w myRIO

Postprzez PrzemB » 09 maja 2017 14:21

Witam,
próbuję opanować pomiar prądu i napięcia z wykorzystaniem myRIO. Mam pewną wątpliwość: na wejściach analogowych myRIO jest jakaś niezerowa wartość od razu po włączeniu urządzenia - bez podłączenia czegokolwiek do AI - poniżej zrzut ekranu z narzędzia monitorującego porty.

Czy można zrobić w myRIO jakąś kalibrację kanałów, żeby sprowadzić te odczyty do zera? Czy po prostu obliczyć średnią dla każdego kanału i "ręcznie" odjąć ją od pomiarów?
Załączniki
myRIO AI graph.jpg
PrzemB
 
Posty: 20
Dołączył(a): 24 mar 2015 18:42
Wersja środowiska: LabVIEW 2014

Re: Wejścia analogowe w myRIO

Postprzez PiDi » 09 maja 2017 20:39

Jest jakieś napięcie tak w ogóle bez podłączenia czegokolwiek? To nic dziwnego akurat, skoro kanały wiszą w powietrzu. Zewrzyj kanał do masy, powinno być zero.

Do poczytania także: http://www.ni.com/white-paper/3344/en/
PiDi
 
Posty: 599
Dołączył(a): 31 gru 2010 01:36
Lokalizacja: Katowice
Pochwały: 116
Wersja środowiska: LabVIEW 2014


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