1、April 2013 Translation by DIN-Sprachendienst.English price group 14No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS
2、19.100!$Td“1994965www.din.deDDIN EN 13477-2Non-destructive testing Acoustic emission Equipment characterisation Part 2: Verification of operatingcharacteristic;English version EN 13477-2:2010,English translation of DIN EN 13477-2:2013-04Zerstrungsfreie Prfung Schallemissionsprfung Charakterisierung
3、der Prfausrstung Teil 2: berprfung der Betriebskenngren;Englische Fassung EN 13477-2:2010,Englische bersetzung von DIN EN 13477-2:2013-04Essais non destructifs mission acoustique Caractrisation de lquipement Partie 2: Vrifications des caractristiques defonctionnement;Version anglaise EN 13477-2:2010
4、,Traduction anglaise de DIN EN 13477-2:2013-04SupersedesDIN EN 13477-2:2010-12www.beuth.deDocument comprises 32 pagesIn case of doubt, the German-language original shall be considered authoritative.04.13 DIN EN 13477-2:2013-04 2 A comma is used as the decimal marker. National foreword This document
5、(EN 13477-2:2010) has been prepared by Technical Committee CEN/TC 138 “Non-destructive testing” (Secretariat: AFNOR, France). The responsible German body involved in its preparation was the Normenausschuss Materialprfung (Materials Testing Standards Committee), Working Committee NA 062-08-23 AA Ultr
6、aschallprfung. Amendments This standard differs from DIN EN 13477-2:2001-04 as follows: a) the standard has been revised in form and substance; b) an alternative test signal that can be generated using commercially available arbitrary function generators (AFG) has been incorporated so that this stan
7、dard can be implemented without using special AE signal processors; c) sensor verification has been expanded to include the verification of current consumption for a standby current and a full scale current, and the verification of internal shielding against electrical noise at the coupling; d) two
8、alternative, easily realizable set-ups are now included to ensure the reproducibility of electronic noise measurements for the verification of sensors and pre-amplifiers; e) verification of filter steepness of the pre-amplifier and signal processer is now included; f) to take account of the limited
9、resolution of analogue-to-digital converters, components that are not dependent on the measured value have been incorporated into the acceptance limits for the accuracy of measurements of amplitude, threshold and external parameters; g) the influence of the relationship between amplitude and thresho
10、ld and of any possible ring-down of the bandpass filter on measurement results is now incorporated into the text and is taken into account in the test signals; h) check forms have been expanded and revised accordingly. Compared with DIN EN 13477-2:2010-12, the following corrections have been made to
11、 the German version only and therefore do not affect the English text: a) a number of corrections have been made to the German text; b) the German title has been corrected. Previous editions DIN EN 13477-2: 2001-04, 2010-12 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 13477-2 September 2010
12、ICS 19.100 Supersedes EN 13477-2:2001English Version Non-destructive testing - Acoustic emission - Equipment characterisation - Part 2: Verification of operating characteristicEssais non destructifs - mission acoustique - Caractrisation de lquipement - Partie 2: Vrifications des caractristiques de f
13、onctionnement Zerstrungsfreie Prfung - Schallemissionsprfung - This European Standard was approved by CEN on 30 July 2010. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard with
14、out any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language
15、 made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
16、Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCH
17、ES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13477-2:2010: ECharakterisierung der Prfausrstung - Teil 2 : b erp rfung der Betriebskenngren EN 13477-
18、2:2010 (E) 2 Contents Page Foreword 41 Scope 52 Normative references 53 Terms and definitions .54 Required test equipment .54.1 List of required equipment .54.2 Test signal waveforms 64.2.1 Continuous sine wave .64.2.2 Triangular modulated sine wave 64.2.3 Sine-modulated sine wave .74.2.4 Rectangula
19、r modulated sine wave .84.2.5 Pulse .94.2.6 Repetitive signals 94.3 Test Body . 104.4 Shielding test plate . 105 Sensor verification 105.1 General . 105.2 Uses . 105.3 Procedure 105.3.1 Preliminary examination 105.3.2 Sensitivity verification 105.3.3 Verification of electrical shielding 115.3.4 Elec
20、trical noise verification of a sensor-preamplifier combination 116 Preamplifier verification . 126.1 General . 126.2 Verification of DC-current consumption 126.3 Measurement of preamplifier characteristics 136.3.1 General . 136.3.2 Gain 136.3.3 Bandwidth 136.3.4 Electronic noise 156.3.5 Dynamic rang
21、e 166.3.6 Pulsing test 167 AE signal processor verification . 167.1 Overview 167.2 Bandwidth and filter roll-off verification . 177.3 Detection threshold verification 177.4 AE signal processor noise verification 177.5 Burst signal parameter verification 187.5.1 General . 187.5.2 Peak amplitude 187.5
22、.3 Duration . 207.5.4 Rise time 207.5.5 Ring down count . 207.5.6 Energy 207.6 Parameters for continuous signal . 218 External parameter verification . 219 System acquisition rate verification . 21DIN EN 13477-2:2013-04 EN 13477-2:2010 (E) 3 10 t measurement verification . 2211 Documentation 22Annex
23、 A (informative) Sensor performance check form 25Annex B (informative) Preamplifier performance check form 27Annex C (informative) AE signal processor - bandwidth Part 2: Verification of operating characteristic. According to the CEN/CENELEC Internal Regulations, the national standards organizations
24、 of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, R
25、omania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. DIN EN 13477-2:2013-04 EN 13477-2:2010 (E) 5 1 Scope This part of the standard specifies methods for routine verification of the performance of AE equipment comprising one or more sensing channels. It is intended for use
26、by operators of the equipment under laboratory conditions. Verification of the measurement characteristics is recommended after purchase of equipment, modifications, use under extraordinary conditions, or if one suspects a malfunction. The procedures described in this European Standard do not exclud
27、e other qualified methods, e.g. verification in the frequency domain. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced d
28、ocument (including any amendments) applies. EN 1330-1:1998, Non destructive testing Terminology Part 1: List of general terms EN 1330-2:1998, Non destructive testing Terminology Part 2: Terms common to the non-destructive testing methods EN 1330-9:2009, Non-destructive testing Terminology Part 9: Te
29、rms used in acoustic emission testing EN 13477-1:2001, Non-destructive testing Acoustic emission Equipment characterisation Part 1: Equipment description IEC 60050 (all parts), International Electrotechnical Vocabulary 3 Terms and definitions For the purposes of this document, the terms and definiti
30、ons given in EN 1330-1:1998, EN 1330-2:1998, EN 1330-9:2009 and IEC 60050 (all parts) and the following apply. 3.1 AE signal processor part of an AE channel for the conversion of the output of the preamplifier to digital signal parameters NOTE The AE signal processor may include additional support f
31、unctions, e.g. preamplifier power supply, test pulse control, transient recorder, and more. 3.2 arbitrary function generator (AFG) electronic device for generating a programmable test signal (burst) 3.3 DC calibrator electronic device for generating an adjustable or programmable DC voltage of approp
32、riate accuracy for stimulating an external parametric input 4 Required test equipment 4.1 List of required equipment The following minimum test equipment is required: DIN EN 13477-2:2013-04 EN 13477-2:2010 (E) 6 a) test body; b) shielding test plate; c) Hsu-Nielsen source, for sensor sensitivity ver
33、ification; d) sweep function/variable pulse generator (if function not included in f); e) multimeter, e.g. for DC voltage and DC current measurement; f) test signal generator, e.g. AE calibrator or arbitrary function generator (AFG); g) variable attenuator, graduated in decibels, can be part of the
34、test signal generator; h) DC-calibrator, for external parameter stimulation; i) DC-power-supply, for preamplifier supply, with a proper circuit to decouple and terminate the AE signal, if the power is fed-in over the signal wire; j) RMS voltmeter, with known or settable time constant or time window;
35、 k) dual channel storage oscilloscope, for preamplifier verification, peak noise measurement and identification of any artefacts on the AE signal. NOTE Items i) to k) can be substituted by a verified AE signal processor comprising peak amplitude and RMS measurement. The inaccuracy of the test signal
36、 generator shall be significantly lower than the acceptable inaccuracies given in this standard and summarized in Table 3. Less accurate test signal generators can be used, if the inaccuracy of each pattern is measured and considered during verification. The reproducibility of the DC calibrator outp
37、ut shall be significantly lower than the acceptable inaccuracy of the external parameter verification. The inaccuracy of the DC calibrator at the used measurement levels shall be obtained and considered during verification (see Clause 8). All electric/electronic test items shall be calibrated to ens
38、ure traceability to SI units. 4.2 Test signal waveforms The following types of test signals shall be used to verify the operating characteristics of the AE measurement system: 4.2.1 Continuous sine wave This type of test signal shall be used to verify the frequency response and gain of the preamplif
39、ier and the continuous signal level accuracy of the AE signal processor. 4.2.2 Triangular modulated sine wave This type of wave simulates an AE burst signal, see Figure 1. It is defined by the following characteristics: A = amplitude; R = rise-time; D = duration; f = carrier frequency. DIN EN 13477-
40、2:2013-04 EN 13477-2:2010 (E) 7 Key mV amplitude Figure 1 Triangular modulated sine wave in time (left) and frequency (right) domain The measured rise time may be shorter than the visible rise time of the test signal because rise time measurement starts at the time of the first threshold crossing. T
41、able 1 shows the dependency of this threshold crossing delay on the difference between maximum amplitude and threshold setting in an AE channel. 4.2.3 Sine-modulated sine wave A sine-modulated signal (see Figure 2) can be used as an alternative to a triangular modulated sine wave. Due to its smooth
42、begin, peak and end, its spectrum is very pure and the influence of filter overshoot and filter ring down behaviour is reduced. This signal can be used to obtain the frequency response of the bandpass of a preamplifier or AE signal processor by burst peak amplitude measurement. Key mV amplitude Figu
43、re 2 Sine-modulated sine wave in time (left) and frequency domain (right) NOTE The shown signal corresponds to the following function: )/(sin)/2sin( SWpBSpSWNSpSWNUNUP= (1) 0=N to )SWpB(SpSW , in integer steps (2) where N = number of each sample in time order; SpSW = Samples per sine wave (48 in Fig
44、ure 2); SWpB = Sine waves per burst (41 in Figure 2); UN = Voltage of sample N; DIN EN 13477-2:2013-04 EN 13477-2:2010 (E) 8 PU = Peak amplitude (100 mV in Figure 2) of simulated burst. The resulting carrier frequency fc is a function of the sample time interval (ts): ()SpSWtf =sc1 (3) or the time i
45、nterval (ts) for a certain carrier frequency is ()SpSWft =cs1 (4) Example in Figure 2: ts= 1/(200 kHz x 48) = 104.167 ns Similar to the triangular modulated sine wave, the rise time measured by an AE signal processor is shorter than the visible rise time of the test signal, because rise time measure
46、ment starts at the time of the first threshold crossing. This so-called “first threshold crossing delay” depends on the difference of maximum amplitude and detection threshold in dB and is listed for the two modulated test signals in Table 1. Table 1 First threshold crossing delay versus amplitude t
47、o threshold ratio for a sin2and triangular modulated test signal Threshold Sin modulated first threshold crossing delay % of signal rise time Triangular modulated first threshold crossing delay % of signal rise time A 20 dB 19,7 11,0 A 25 dB 15,0 6,0 A 30 dB 12,3 3,5 A 35 dB 8,3 3,0 A 40 dB 7,6 1,0
48、4.2.4 Rectangular modulated sine wave This type of signal is defined by the characteristics A, D and f, see 4.2.2 and Figure 3. Key mV amplitude Figure 3 Rectangular modulated sine wave in time (left) and frequency domain (right) DIN EN 13477-2:2013-04 EN 13477-2:2010 (E) 9 4.2.5 Pulse This test signal shall be used to check the meas
