1、 KS C 3701KSKSKSKSSKSKSKS KSKSKS SKSKS KSKS SKS KS KS C 3701: 2007(2012 ) 2007 10 5 http:/www.kats.go.krKS C 3701: 2007 : ( ) ( ) () ( ) : (http:/www.standard.go.kr) : :2007 10 5 :2012 12 27 20120782 : : ( 02-509-7294) (http:/www.kats.go.kr). 10 5 , . KS C 3701: 2007 i . , , , . , , . KS C 3701: 200
2、7 (2012 ) Partial discharge measurements with acoustic emission method . 1 400 Hz , , . . . . , . . . . (calibration) . . . . , , , . 2 . . KS B ISO 12713, KS B ISO 12714, ASTM E 650, Standard Guide for Mounting Piezoelectric Acoustic Emission Sensors ASTM E 750, Standards Practice for Characterizin
3、g Acoustic Emission Instrumentation KS C 3701: 2007 2 ASTM E 1106, Standard Method for Primary Calibration of Acoustic Emission Sensors NDIS 2106, Methods for Assessing the Performance Characteristics of Acoustic Emission Testing System 3 . a) - . 1) 1 (ASTM E 1106 KS B ISO 12713) 2) 2 b) , c) . , .
4、 . d) e) f) g) . , , . h) . , i) . , , 4 . a) . 1) 2) 3) 4) 5) b) . 1) 2) RMS 3) 4) ( ) 5) Tone Burst Generator c) KS C 3701: 2007 3 . 1) 2) ( ) 3) 4) 5) 6) DC 7) 8) 9) 10) . . , , , , . 5 . 5.1 KS B ISO 12714 . 5.1.1 ( A36 ) . 180 mm . 180 mm 400 mm 0.12 mm(0.06 mm) . , KS B ISO 12714 . 5.1.2 . 0.1
5、 mm 0.25 mm 6 mm KS B ISO 12714 . 5.1.3 NBS 1 100 kHz 1 MHz 20 dB . 5.1.4 . . , 9.8 N . KS C 3701: 2007 4 5.1.5 2 . 8bit 20 MHz 10bit 10 MHz . 55 s . . 5.2 . 5.2.1 2 2 048 10bit t 0.05 s . 60 s . , . 55 s 55 s 10 . 5.2.2 FFT S(fm) U(fm) (1) (2) . =10jm)/2exp()(njnmjisfS (1) =10jm)/2exp()(njnmjiufU (
6、2) fm: m/T m (MHz) sj: j uj: j m : 0, 1, 2,., n/2-1 n : 2 048 j : 0, 1, 2, 3,., n-1 1/T 9.76 kHz , sj, uj (V) . (3) . )()()()(mm0mmfSfSfUfD = (3) S0(fm): fm V/m . S0(fm) 1 (KS B ISO 12713) . 5.2.3 KS C 3701: 2007 5 D(fm) rm m D(fm) . rm D(fm) (4) )()(arctanmmmfDRfDIzz= (5) Iz : z Rz : z m: m dB . m
7、20 log10(rm) (6) m m . 5.3 ASTM E 750 . 5.3.1 , , , , , , , , . 5.3.2 , , . , . 5.3.3 (Preamplifier) , . 5.3.4 AE AE . a) b) c) d) e) 5.3.5 KS C 3701: 2007 6 , , , , - , (RAM, disk, plots) . 5.4 . 5.4.1 , , , . , . 1 , , , , , 5.4.2 3 dB . . (7) . fM (fLfM)1/2(7) fM: fL: fM: 5.4.3 . . 5.4.4 1 , . 2
8、, . , . 2 . . . , . 5.4.5 KS C 3701: 2007 7 , . (white noise source) . 5.4.6 3dB . 5.5 (Gain) a) , 2 , . b) 1 . . . Vosc 1 V . Vout . 1 V . . RMS . , , . 5.6 (Dynamic range) , . . . , . 5.6.1 (DR) (8) . outputnoisermsoutputrmsmaximumDR10log20= (8) a) (Threshold) . . b) , . , . c) , . (Overload immun
9、ity) . (9) . )/(log2010ThMinThMaxDRe= (9) KS C 3701: 2007 8 DRe : Max Th : Min Th : 1 count . 5.6.2 ( ) 1 / . , . (Vout) . 5.6.3 1 . . Vosc 1 V - . 3dB . 5.6.4 . , , . . 5.7 (Dead time) 5.7.1 . (lock-out time) . . . 5.7.2 . a) b) . c) (count rate) . d) . e) ( , 0 ). KS C 3701: 2007 9 (Td) (10) . Td
10、1/Fm 1/Fu (10) Fm: Fu: 5.7.3 , , , AE . a) . b) AE , , , , . c) . d) ( ) . (Td) (11) . Td 1/Rp Dp (11) Dp: Rp: AE . 5.8 ( ) a) (hit) . , , . . (hit) . b) 1 , (Vout) . 2 . , . 2 Vout . . . c) . , , . 5.9 5.9.1 . (rate counter) . , , KS C 3701: 2007 10 . 5.9.2 . a) , . b) . c) 1 , . d) . . 5.10 . a) . , , , . . b) , , . 1) . 2) . 3) , , 10 % . 4) . 5) (: 10 % ) 10 % . 6) , 3) . , 10 % . 7) , AE . , (12) . 2/2DVE (12) D : V : 8) 3) . 10 % . 10 % KS C 3701: 2007 11 . . 9) . c)