DIN ISO 16063-22-2015 Methods for the calibration of vibration and shock transducers - Part 22 Shock calibration by comparison to a reference transducer (ISO 16063-22 2005 + Amd 1 .pdf

1、April 2015 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、17.160!%B3l“2311673www.din.deDDIN ISO 16063-22Methods for the calibration of vibration and shock transducers Part 22: Shock calibration by comparison to a reference transducer(ISO 16063-22:2005 + Amd.1:2014),English translation of DIN ISO 16063-22:2015-04Verfahren zur Kalibrierung von Schwingungs- u

3、nd Stoaufnehmern Teil 22: Stokalibrierung durch Vergleich mit einem Referenzaufnehmer(ISO 16063-22:2005 + Amd.1:2014),Englische bersetzung von DIN ISO 16063-22:2015-04Mthodes pour ltalonnage des transducteurs de vibrations et de chocs Partie 22: talonnage de chocs par comparaison avec un transducteu

4、r de rfrence(ISO 16063-22:2005 + Amd.1:2014),Traduction anglaise de DIN ISO 16063-22:2015-04www.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.30A comma is used as the decimal marker. Contents Page National foreword .3 National Annex

5、NA (informative) Bibliography 5 1 Scope 6 2 Normative references 6 3 Terms and definitions .7 4 Uncertainty of measurement 7 5 Apparatus .8 5.1 General considerations .8 5.2 Anvil shock calibrators (100 m/s2to 100 km/s2) 8 5.3 Hopkinson bar shock calibrators 13 5.4 Oscilloscope 14 5.5 Waveform recor

6、der with computer interface . 14 5.6 Computer with data-processing capability 15 5.7 Filters . 15 5.8 Other requirements. 15 6 Ambient conditions 15 7 Preferred accelerations and pulse durations 15 8 Method . 16 8.1 Test procedure 16 8.2 Data acquisition 16 8.3 Signal processing . 16 9 Reporting the

7、 calibration results 20 Annex A (normative) Expression of uncertainty of measurement in calibration 21 Annex B (informative) Uncertainty examples Expression of uncertainty of measurement in calibration 24 !Annex C (informative) Dispersion in bars“ . 27 Bibliography . 29DIN ISO 16063-22:2015-04 2 Nat

8、ional foreword The text of ISO 16063-22:2005 and Amendment 1:2014 has been prepared by Technical Committee ISO/TC 108 “Mechanical vibration, shock and condition monitoring”, Subcommittee SC 3 “Use and calibration of vibration and shock measuring instruments” (Secretariat: DS, Denmark). The responsib

9、le German body involved in its preparation was the Normenausschuss Akustik, Lrmminderung und Schwingungstechnik im DIN und VDI (Acoustics, Noise Control and Vibration Engineering Standards Committee in DIN and VDI), Working Committee NA 001-03-02 AA (NALS/VDI C 2) Schwingungsmess-technik. Attention

10、is drawn to the possibility that some of the elements of this document may be the subject of patent rights. DIN shall not be held responsible for identifying any or all such patent rights. This standard includes Amendment 1:2014 published by ISO on 1 December 2014. The start and finish of text intro

11、duced or altered by amendment is indicated in the text by tags ! and “. The term pulse is defined as a variation of a physical quantity where a transition from one value to another is followed immediately or after some time interval by a return to the initial value (IEV 101). The DIN Standards corre

12、sponding to the International Standards referred to in this document are as follows: ISO 5348 DIN ISO 5348 ISO 9001 DIN EN ISO 9001 ISO 16063-21 DIN ISO 16063-21 ISO/IEC 17025 DIN EN ISO/IEC 17025 The German Standards are given in National Annex NA “Bibliography”. ISO 16063 Methods for the calibrati

13、on of vibration and shock transducers consists of the following parts: Part 1: Basic concepts Part 11: Primary vibration calibration by laser interferometry Part 12: Primary vibration calibration by the reciprocity method Part 13: Primary shock calibration using laser interferometry Part 15: Primary

14、 angular vibration calibration by laser interferometry Part 16: Calibration by Earths gravitation Part 21: Vibration calibration by comparison to a reference transducer Part 22: Shock calibration by comparison to a reference transducer Part 31: Testing of transverse vibration sensitivity DIN ISO 160

15、63-22:2015-04 3 Part 32: Resonance testing Testing the frequency and the phase response of accelerometers by means of shock excitation*) Part 33: Testing of magnetic field sensitivity *) Part 41: Calibration of laser vibrometers Part 42: Calibration of seismometers with high accuracy using accelerat

16、ion of gravity Part 43: Calibration of accelerometers by model-based parameter identification *)Further parts will be developed in the future which can replace parts of the ISO 5347 standards series. ISO 5347 Methods for the calibration of vibration and shock pick-ups consists of the following parts

17、: Part 7: Primary calibration by centrifuge Part 8: Primary calibration by dual centrifuge Part 12: Testing of transverse shock sensitivity Part 13: Testing of base strain sensitivity Part 14: Resonance frequency testing of undamped accelerometers on a steel block Part 15: Testing of acoustic sensit

18、ivity Part 16: Testing of mounting torque sensitivity Part 17: Testing of fixed temperature sensitivity Part 18: Testing of transient temperature sensitivity Part 19: Testing of magnetic field sensitivity Part 22: Accelerometer resonance testing General methods *) In preparation. DIN ISO 16063-22:20

19、15-04 4 National Annex NA (informative) Bibliography DIN EN ISO 9001, Quality management systems Requirements DIN EN ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories DIN ISO 5348, Mechanical vibration and shock Mechanical mounting of accelerometers DIN I

20、SO 16063-21, Methods for the calibration of vibration and shock transducers Part 21: Vibration calibration by comparison to a reference transducer IEV 101, International Electrotechnical Vocabulary Part 101-11: Mathematics Scalar and vector quantities; Identical with IEC 60050-101*)*) Freely availab

21、le at www.dke.de/de/Online-Service/DKE-IEV/Seiten/IEV-Woerterbuch.aspx DIN ISO 16063-22:2015-04 5 1 Scope This part of ISO 16063 specifies the instrumentation and procedures to be used for secondary shock calibration of rectilinear transducers, using a reference acceleration, velocity or force measu

22、rement for the time-dependent shock. !The methods are applicable in a shock pulse duration range1)of 0,025 ms to 8,0 ms and a dynamic range (peak value) of 100 m/s to 2 000 km/s (time dependent).2 2“These methods are not intended for the calibration of dynamic force transducers used in modal analysi

23、s. ! NOTE 1 Larger accelerations (peak values) than 100 km/s2and shorter pulse durations than 0,05 ms are possible with traceability to ISO 16063-13 under the following conditions for the primary shock calibration. The shock machine is based on wave propagation inside a long thin bar as specified in

24、 ISO 16063-13:2001, 4.3. An interferometer method and procedure specified in ISO 16063-13, 4.6 is used observing the maximum measurable velocity. The uncertainty requirements specified in ISO 16063-13 are complied with. Reference to primary methodologies (traceability) is limited to the maximum acce

25、leration value used in the primary calibration.“ NOTE 2 The methods specified in this part of ISO 16063 are based on the measurement of the time history of the acceleration. These methods fundamentally deviate from another shock calibration method that is based on the principle of the change in velo

26、city, described in ISO 16063-1. The shock sensitivity therefore differs fundamentally from the shock calibration factor obtained by the latter method, but is in compliance with the shock sensitivity stated in ISO 16063-13. 2 Normative references The following referenced documents are indispensable f

27、or the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 2041, Vibration and shock Vocabulary ISO 5347-22, Methods for the calibration of vibration and shoc

28、k pick-ups Part 22: Accelerometer resonance testing General methods1ISO 16063-1:1998, Methods for the calibration of vibration and shock transducers Part 1: Basic concepts )!ISO 16063-13:2001, Methods for the calibration of vibration and shock transducers Part 13: Primary shock calibration using las

29、er interferometry“ ISO 18431-2, Mechanical vibration and shock Signal processing Part 2: Time domain windows for Fourier Transform analysis 1) Under revision to become a part of ISO 16063. DIN ISO 16063-22:2015-04 6 Methods for the calibration of vibration and shock transducers Part 22: Shock calibr

30、ation by comparison to a reference transducer 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 2041 and the following apply. 3.1 peak value maximum value of the magnitude or absolute value of the shock pulse 4 Uncertainty of measurement The limits of

31、the uncertainty of shock sensitivity measurement are as shown in Table 1. Table 1 Uncertainty reference conditions for secondary shock calibration The uncertainty of measurement is expressed as the expanded relative measurement uncertainty in accordance with ISO 16063-1 (briefly referred to as “unce

32、rtainty”). The specified uncertainties are based on a coverage factor k = 2 that is a coverage probability of about 95 %. The uncertainty specifications of Table 1 can be achieved as long as the spectral energy produced by the excitation of any mode of resonance inherent in the transducer or shock m

33、achine structure during calibration is small relative to the spectral energy contained in the frequency range of calibration. The transducer resonance testing shall be performed in accordance with ISO 5347-22. NOTE For the calibration of transducers of high accuracy (e.g. reference transducers) and

34、if great care is taken to keep all uncertainty components small enough to comply with the specifications (see uncertainty budgets in Annex A), smaller uncertainties than stated in Table 1 may be achievable. For the pendulum shock calibrator, the dropball shock calibrator and the pneumatically operat

35、ed piston shock calibrator, an uncertainty of 1 % has been obtained in an interlaboratory comparison covering acceleration peak values from 200 m/s2to 2 000 m/s21. The acceleration peak magnitude may be expressed in terms of the standard acceleration due to gravity, symbol gn(1 gn = 9,806 65 m/s2; 1

36、,5 km/s2 150 gn). The shortest shock duration applicable to a transducer according to the manufacturers specification shall be taken into account to avoid increasing the measurement uncertainty and damaging or destroying the transducer. !Shock calibrator apparatus Acceleration peak magnitudeakm/s2Mi

37、nimum pulse durationa bms Uncertainty limit Pendulum 1,5 2 5 % Dropball 100 0,100 5 % Pneumatically operated piston 100 0,100 5 % Hopkinson bar with velocity comparison 2 000c0,025c10 % Hopkinson bar with acceleration comparison 2 000c0,025c6 % Split Hopkinson bar with force comparison 2 000c0,025c1

38、0 % aVariations in peak values and duration = 10 %. bPulse duration is measured at 10 % of the peak value (see Clause 7). cIn the case of Hopkinson bars, the minimum pulse duration is limited by the bandwidth over which the bar approximates an ideal compressional waveguide as dictated by the diamete

39、r and material properties of the bar. For more information, see Annex C.“ DIN ISO 16063-22:2015-04 7 5 Apparatus 5.1 General considerations All surfaces on which transducers (the reference or the transducer under test) are mounted shall be polished, flat and clean. The surface on which the transduce

40、r is to be mounted shall have a roughness value, expressed as the arithmetical mean deviation, Ra, of less than 1 m. The flatness shall be such that the surface is contained between two parallel planes 5 m apart, over the area corresponding to the maximum mounting surface of any transducer to be cal

41、ibrated. The drilled and tapped hole for connecting the transducer shall have a perpendicularity tolerance to the surface of less than 10 m; i.e. the centreline of the hole shall be contained in a cylindrical zone of 10 m diameter and a height equal to the hole depth. Appropriate screw and bolt torq

42、ue may be found in numerous references and are chosen according to the mounting surface material. The recommendations of the transducer manufacturer shall be followed in all cases. 5.2 Anvil shock calibrators (100 m/s2to 100 km/s2) 5.2.1 General considerations This clause gives recommended specifica

43、tions for the anvil shock calibrators to obtain the uncertainties of Clause 4. When back-to-back calibrations are performed with the dropball shock calibrator or the pneumatically operated piston shock calibrator, it is recommended that the transducer under test be mounted directly on top of the ref

44、erence transducer as shown in Figure 1. This mounting is not recommended for pendulum shock calibrators, see 5.2.2 and Figure 3. For best accuracy, test transducers and mounting fixtures should not have dimensions or masses significantly greater than that of the reference transducer because the sens

45、itivity and frequency response of the reference transducer will vary slightly depending on the amount of mass attached. For all methods, the natural period of the test transducer, equal to the inverse of the resonance frequency, shall be less than 0,2 times the half-sine pulse duration of the applie

46、d shock pulse to eliminate excessive overshoot and “ringing” due to resonance excitation. Key 1 test transducer 2 reference transducer 3 test mass 4 anvil Figure 1 Recommended mounting of transducers, anvil and test masses DIN ISO 16063-22:2015-04 8 5.2.2 Pendulum shock calibrator The pendulum shock

47、 calibrator provides an assessment of the shock sensitivity and magnitude linearity for transducers and a means of calibrating large quantities of transducers. Comparison calibrations are performed at accelerations ranging from 100 m/s2to 1 500 m/s2(10 gnto 150 gn) at half-sine pulse durations (meas

48、ured at 10 % magnitude) from 3 ms to 8 ms. A schematic diagram of the pendulum shock calibrator is shown in Figure 2. The shock pulse duration, T, is dependent on the acceleration peak value, i.e. 3 ms at 1 500 m/s2and 8 ms at 100 m/s2. Amplitude linearity may be measured over 4 to 7 impacts of the

49、pendulum system, or with a number of single shock pulses at different acceleration magnitudes. The pendulum shock calibrator consists of a rigid frame, a hammer pendulum and an anvil pendulum. Typical dimensions for the frame are approximately 500 mm by 500 mm for the square base plate and 780 mm height. The mass of the whole construction is approximately 60 kg. The length of anvil pendulum is approximately 400 mm. Shifting the hammer pendulum to the desired angular disp