Slide 1

10-01-2013 ThursdayH NI : 10CC tuyt riBATHROOM

B nc :DEmEmEmEmEmEmO LNG V CM BIN CM BIN MC

Em no tr li cho c :Khi nim ?Phn loi / nguyn l / ng dng NHOM 3Mrs HaTHC N MN LUKhi nim v o mc.Phn loi phng php o mcPhng php thu tnhPhng php inPhng php bc xo mc theo phng php thu tnhCm bin mc kiu phao c khCm bin mc kiu phao tCm bin mc kiu phao bin tro mc theo phng php inCm bin mc kiu in dnCm bin mc kiu in dungo mc theo phng php bc xCm bin siu mCm bin mc kiu bc xCc phng php o mc khc.I. Khai niem o mc : L cch o xc nh mc cht lu hoc khi lng cht lu trong bnh cha .Ngng Lin tc I. Phng phap Thuy Tnh : Cm bin mc kiu phao c kh Cm bin mc kiu phao t Cm bin mc kiu phao bin tr Thy tnh3T4T1T2TNguyn l cng tc hnh trnh :Da vo l xo co dn ng cc cp 1T-2T hoc 3T-4T 1. Phng php dng phao c kh S dng cng tc hnh trnh 3D4D1T2TMy BmHnh 1. ng Dng Phao C Kh.1T2T3D4DB TngB chm1. Phng phap Thuy Tnh : Cm bin mc kiu phao c kh Cm bin mc kiu phao t Cm bin mc kiu bin tr Thy tnhNguyn l cng tc t :

NS2. Phng php dng phao t - Cng tc t- Nam chm vnh cuCng tc tng dng : Cm bin kiu phao t c c im l cc tip im li g c t rt kn bn trong v nha nn c th chu c mi trng ha cht, du m. V vy trong thc t, ngi ta thng dng cm bin mc kiu phao t trong cng nghip ha cht hoc du m.

1. Phng phap Thuy Tnh : Cm bin mc kiu phao c kh Cm bin mc kiu phao t Cm bin mc kiu bin tr Thy tnh3. Phng php dng bin tr Bin tr gn vi phao ni trn mt nc MINMAXPhao Bin Tr2. Phng phap ien : Phng php in dn Phng php in dung Phng php in dn :

Nguyn l : Hot ng theo nguyn tc chuyn i trc tip bin thin mc cht lng thnh tn hiu in da vo tnh dn in ca cht lng

Phn loi :

o theo ngng o lin tc

P0P3P2P1P0P1P2P3Cm Bin Kiu in DnT1T2T3o theo ngng :< 10V

o lin tc :Bnh khng dn inBnh dn in (Kim loi )Ampe k Ampe kAmpe kAAng dng :

Dng o cht lng dn in khng c tnh n mn , khng cha cc th vn cch in nh du m

Mch cm bin in dnng dng thc t : Bm nc t ng2. Phng phap ien : Phng php in dn Phng php in dung Phng php in dung :

Nguyn l : Da vo s bin i in dung

C : in dung S : Din tch ca bn cc : Hng s in mi D : Khong cch gia 2 bn cc

C = (S x ) / d DSin dung (C) : T l thun vi S v T l nghch vi d = (x ) / d CSin dung tng/gim theo din tch tip xc bn cc vi in mi : Mi trng khng dn in :V bnh bng Kim Loi : Mi trng khng dn in :

Mi trng dn in :Cu to in ccBc cch inin cc12

Kh th Kh quLm th no y ?Bi ton :15 m

Bc x3. Phng phap Bc xa : Cm bin siu m Cm bin s dng bc x quang hc 2 loai :Calculating..100%0%50%

10,000 Km Cm bin siu m

Nguyn l :Da vo kh nng phn x ca sng m

S = v . t/2

V = 343 m/s (Khng kh )T = thi gian t khi pht nhn Cm bin bc x quang hc : Nguyn l : - S hp th bc x ca cht lng tn hiu nhn b suy gim So snh vi tn hiu pht pht hin

ng dng : - c s dng o mi trng c tnh n mn mnh , nhit , p sut cao

Cm bin siu m : Cm bin bc x quang hc : 9-30V nhy quang ph : 400 ~ 1100 nm nhy quang ph ti a ti : 780 nm

3. Cac phng phap khac :

Khi nim v o mc.Phn loi phng php o mcPhng php thu tnhPhng php inPhng php bc xo mc theo phng php thu tnhCm bin mc kiu phao c khCm bin mc kiu phao tCm bin mc kiu phao bin tro mc theo phng php inCm bin mc kiu in dnCm bin mc kiu in dungo mc theo phng php bc xCm bin siu mCm bin mc kiu bc x quang hcCc phng php o mc khc.THANKS FOR LISTEN !!Nguyn th Huyn ThngHong Thy Linh V th Thy Nguyn Th Hng (108)Hong Vn Hon Nguyn nh T Khut nh Vinho Duy LiNguyn Hng MnhCao Vn Cng

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