On- l ine com puter detecting system of p ipel ine leak and its algor ithm

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1 19 4 V o l. 19 N o. 4 Con trol and D ecision A p r : (2004) , (, ) :,.,,, GPS.. : ; ; ; : T P277 : A On- l ine com puter detecting system of p ipel ine leak and its algor ithm F EN G J ian, ZH A N G H ua2g uang ( Schoo l of Info rm ation Science and Engineering, N o rtheastern U niversity, Shenyang , Ch ina. Co rrespendent: FEN G J ian, E2m ail: fjneu@ 163. com ) Abstract: T he arch itecture of the on2line computer detecting system of p ipeline leak is designed, and a k ind of logical judge fault detection algo rithm based on w o rk ing status analysis is p ropo sed. U nder the condition that w o rk ing status frequently changes during transferring o il, the fault detection of o il p ipeline leak can be im p roved comm endably by emp loying th is m ethod, w h ich can estim ate the natural range of p ipeline running data. T he alert veracity and location p recision can be consum edly im p roved by com bining GPS techno logy and negative p ressure w ave location algo rithm. T he locale testing results and p ractical industrial app lication show validity of th is m ethod. Key words: leak; fault detection; on2line detection; w o rk ing status analysis 1 ( ),, ( ), ( ) ; ( ),.,, ;., [1 4 ]., ;,, ;,.,. : ; : : ( ); ( ) : (1971 ),,,,, ; (1959 ),,,,,.

2 378 19,, (, ).,,.,. [ 5, 6 ], ; [ 7 ],,.,,, ,, 1 2,,.,,,. GPS,., 3. : 1), 1. 5 ; 2) ; 3) ; 4) 60 s 50 km ; 5) 3

3 4 : 379 ; 6) ; 7) ; 8), ; 9) ; 10) (G IS),, ; 11),., [8 ], [9 ]., ,. :, (p h i, p ti, f h i, f ti, T h i, T ti) m, p, f, T, h, t, i = 1, 2,, m,, f i = K (T h i) f hi - K (T ti) f ti. (1) : K (T ) 20., f (x ) = 1 2ΠΡx exp ( - (x - Λx ) 2 2Ρ 2 x ). (2) : x p h i, p ti, f h i, f ti, f ; Λx x ; Ρx x. m, Λx 0 = E (x ) 0, (3) Ρx 0 = D (x ) 0 = E (x 2 ) 0 - E (x ) 2 0, (4) E (x 2 ) 0 = 1 m m x 2 i. (5) i= 1, 1.. (, ),., 0,, ;. n Λx n = E (x ) n, E (x 2 ) n, n + 1 E (x ) n+ 1 = Αn+ 1E (x ) n + Βn+ 1g x n+ 1, (6) E (x 2 ) n+ 1 = Αn+ 1E (x 2 ) n + Βn+ 1g x 2 n+ 1, (7) Ρx n+ 1 = D (x ) n+ 1 = E (x 2 ) n+ 1 - E (x ) 2 n+ 1. (8) : Αn+ 1, Βn+ 1, Αn+ 1 + Βn+ 1 = 1.,.,,., Α, Β. ( 1),. 1, ( ) ; ( > 20L gs) ( < - 20L gs) (> 0. 5L gs) (> 0. 5L gs) (0L gs )

4 380 19,, ;,. 3. 2,,,,.,,,.,, m gs,,,.. X = L - v 3 t. (9) 2 : X, m; L, m ; t, s; v, m gs. L, v, t., t., GPS, GPS,.,.,.., ,,., (t) d t = 0, (10) (t) d t = A < +, 7 (t) L 2 (R ), (11) 7 (Ξ) g Ξ= 0 = 0. (12) x (t) W T x (a, t) = x (Σ) 7 ( t - Σ a ) dσ, (13) 1 a W T ax (t) = x (t) 3 7 a (t). (14) : 3, a, 7 a (t) = 7 (t). 1 a 7 ( t a ) 7 (t), 2. 7 (t), 7 a (t) (F T ) 7 a (Ξ),, Q = 2 Ξ, 2. Ξ0,,,.,,,,.,,. ;.,,,,.,. 7 (t), 7 (t) = 12 e- : t 2 2. (15) d dt [W T ax (t) ] = d dt [x (t) 3 7 a (t) ] = x (t) 3 d7 (t) a. (16) dt

5 4 : 381, x (t),.,., gs g gkm gkm g , 2, km, 273 mm, 7 mm, ( ) 80, ( ) 45, m 3 gh., ( ) km, 20 3 m 3 gh, s. 2 ; 3 ; 4 2 gm Pa g(l gs) , 10 s. 2 4 :, 100 ; ; 200 m, 1. 5, [ 7 ] 2., 1, ; 1. 5,.,,., 6, 45, 30 s, 100, ,,., GPS,

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