transductores presentacion

8/21/2019 TRANSDUCTORES PRESENTACION

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TRANSDUCTORESCAPACITIVOS Y

RESISTIVOSDENNIS CRUZ

4TO “A” PETRÓLEOS10-04-2012


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TRANSDUCTORES

Generalidades:El transdut!r "s "l !#$!n"nt" %u" !n&'"rt" la #a(n'tud )*s'a a

#"d'r+ "n una s",al "ltr'a.En "st" !#$!n"nt" s" $u"d" d')"r"n'ar "ntr" "l sensor+ %u" "s "l

"l"#"nt! s"ns'/l" $r'#ar'! %u" r"s$!nd" a las &ar'a'!n"s d" la

#a(n'tud %u" s" #'d"+ "l transductor %u" "s "l %u" ll"&a aa/! la!n&"rs'n "n"r(t'a "ntr" la #a(n'tud d" "ntrada d" sal'da.L!s transdut!r"s s" su"l"n las'ar "n d!s (ru$!s3L!s transductores activos s!n d's$!s't'&!s %u" ("n"ran "n"r(*a

"ltr'a $!r !n&"rs'n d" "n"r(*a $r!"d"nt" d"l s'st"#a s!/r" "l %u"#'d". L!s transdut!r"s at'&!s n! n""s'tan )u"nt" d" al'#"nta'n $ara

$!d"r !$"rar.L!s transductores pasivos s!n a%u"ll!+ "n l!s %u" n! s" $r!du"

!n&"rs'n d" "n"r(*a. Al(n $ar5#"tr! d"l transdut!r "s )un'n d" la#a(n'tud %u" s" #'d"+ las &ar'a'!n"s d" "st" $ar5#"tr! "s ut'l'6ad!$ara #!dular la "n"r(*a "ltr'a $r!"d"nt" d" una )u"nt" %u" "n "st"as! s" n""s'ta.


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Transductores ResistivosC!nst'tu"n+ s'n duda+ un! d" l!s trans#'s!r"s "ltr'!s #5s

s"n'll!s. C!ns'st"n "n un "l"#"nt! "l5st'! 7tu/! 8!urd!n ! 5$sula9

%u" &ar*a la r"s'st"n'a :#'a d" un $!t"n'#"tr! "n )un'n d" la$r"s'n. El $!t"n'#"tr! $u"d" ad!$tar la )!r#a d" un s!l! :'l!!nt'nu! ! /'"n "star arr!llad! a una /!/'na s'(u'"nd! un &al!r l'n"al! n! d" r"s'st"n'a. E;'st"n &ar'!s t'$!s d" $!t"n'#"tr! s"(n s"a"l "l"#"nt! d" r"s'st"n'a3 $!t"n'#"tr!s d" (rat!+ d" r"s'st"n'a/!/'nada+ d" $"l*ula #"t5l'a d" $l5st'! #!ld"ad!.

En la s'(u'"nt" (ura $u"d" &"rs" un transdut!r r"s'st'&!r"$r"s"ntat'&! %u" !nsta d" un #u"ll" d" r")"r"n'a+ "l "l"#"nt! d"$r"s'n un $!t"n'#"tr! d" $r"'s'n. El #u"ll" d" r")"r"n'a "s "l!ra6n d"l transdut!r a %u" su d"s&'a'n al !#$r'#'rs" d"/" s"rn'a#"nt" una )un'n d" la $r"s'n ad"#5s d"/" s"r'nd"$"nd'"nt" d" la t"#$"ratura+ d" la a"l"ra'n d" !tr!s

)at!r"s a#/'"nt"s ";t"rn!s.


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L!s transdut!r"s r"s'st'&!s s!n s'#$l"s su s",ald" sal'da "s /astant" $!t"nt" !#! $ara

$r!$!r'!nar una !rr'"nt" d" sal'da su'"nt" $ara"l )un'!na#'"nt! d" l!s 'nstru#"nt!s d" 'nd'a'ns'n n""s'dad d" a#$l'a'n. S'n "#/ar(!+ s!n'ns"ns'/l"s a $"%u",!s #!&'#'"nt!s d"l !ntat!

d"l urs!r+ #u s"ns'/l"s a &'/ra'!n"s $r"s"ntanuna "sta/'l'dad $!/r" "n "l t'"#$!.El 'nt"r&al! d" #"d'da d" "st!s trans#'s!r"s

!rr"s$!nd" al "l"#"nt! d"+ $r"s'n %u" ut'l'6an7tu/! 8!urd!n+ )u"ll"9 &ar*a "n ("n"ral d" 0-0+1 a

0-#?. La $r"'s'n "s d"l !rd"n d" 1-2 @


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Transductores CapacitivosS" /asan "n la &ar'a'n d" a$a'dad %u" s"

$r!du" "n un !nd"nsad!r al d"s$la6ars"una d" sus $laas $!r la a$l'a'n d" $r"s'n+tal !#! l! #u"stra la s'(u'"nt" (ura.


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La $laa #&'l t'"n" )!r#a d" d'a)ra(#a s""nu"ntra s'tuada "ntr" d!s $laas as.

L!s transdut!r"s a$a't'&!s s" arat"r'6an $!rsu $"%u",! ta#a,! su !nstru'n r!/usta+t'"n"n un $"%u",! d"s$la6a#'"nt! &!lu#tr'! s!n ad"uad!s $ara #"d'das "st5t'as d'n5#'as.

Su s",al d" sal'da "s d/'l $!r l! %u" $r"'san d"a#$l'ad!r"s !n "l r'"s(! d" 'ntr!du'r "rr!r"s"n la #"d''n. S!n s"ns'/l"s a las &ar'a'!n"s d"t"#$"ratura a las a"l"ra'!n"s trans&"rsal"s $r"'san d" un aust" d" l!s 'ru't!s !s'lant"s

d" l!s $u"nt"s d" .a. a l!s %u" "st5n a!$lad!s.Su 'nt"r&al! d" #"d'da "s r"lat'&a#"nt" a#$l'!+

"ntr" 0+0B-B a 0+B-00 /ar su $r"'s'n "s d"l!rd"n d" 0+2 a 0+B @.


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Caractersticas de un

Transductor CapacitivoEn #u:as a$l'a'!n"s $u"d"n "#$l"ars" l!s

transdut!r"s a$a't'&!s $ara d"t"tar a#/'!s "nd'#"ns'!n"s s'n "star "n !ntat! !n "l "l"#"nt! "n

#!&'#'"nt!. P!r "sta ra6n l!s transdut!r"s a$a't'&!s+)r"u"nt"#"nt" lla#ad!s d"t"t!r"s d" $r!;'#'dad+ "st5nl'/r"s d" ar(as+ )r''!n"s "rr!r"s d" :'str"s's. Otraarat"r*st'a d"l transdut!r "s %u" la a$a'tan'a n!d"$"nd" d" la !ndut'&'dad d" sus $laas. P!r l! tant!

l!s "rr!r"s d"/'d! a la t"#$"ratura s!n ";tr"#ada#"nt"$"%u",!s s' n! "s %u" aus"nt"s+ a %u" las d'#"ns'!n"sd" las $laas $r5t'a#"nt" n! d"$"nd"n d" lat"#$"ratura la &ar'a'n d" la !nstant" d'"ltr'a d"la'r" d"/'da a la t"#$"ratura "s #u $"%u",a.


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D"/'d! a %u" la '#$"dan'a d" sal'da d" un transdut!ra$a't'&! "s #u alta+ s" r"%u"r'r5 d" a/l" /l'ndad! $ara!n"tarl! al "%u'$! "l"trn'! 7l! #5s r"!#"nda/l" "sut'l'6ar a/l" !a;'al9. En #u:as a$l'a'!n"s "l t'$! d"a/l" ut'l'6ad! $ara las !n";'!n"s #"r""!ns'd"ra'!n"s "s$"'al"s a %u" su a$a'tan'a "star*a"n $aral"l! !n la d"l a$a't!r d"l transdut!r+ $!r l! %u"s" r"%u"r'r5 d" un a/l" !a;'al d" /aa a$a'tan'a.

En al(unas !as'!n"s "l $r!/l"#a d" "rr!r $r"s"ntad! $!rla alta '#$"dan'a d"l transdut!r a$a't'&! $u"d" s"r"l'#'nada al !l!ar $art" d"l 'ru't! d" $r!"sa#'"nt!d"ntr! d"l #'s#! transdut!r. C!n "sta tn'a "s $!s'/l"'n!r$!rar un trans)!r#ad!r d" '#$"dan'a %u" $r!&"auna '#$"dan'a d" sal'da /aa+ $"r#'t'"nd! l!al'6ar "ltransdut!r a '"rta d'stan'a d"l "%u'$! d"$r!"sa#'"nt!.


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