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JJF 1505-2015: Calibration Specification for Acoustic Emission Instrumentation
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JJF 1505-2015: Calibration Specification for Acoustic Emission Instrumentation

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Calibration Specification for Acoustic Emission Instrumentation People's Republic of China National Metrology Technical Specifications Acoustic emission detector calibration specification Issued on. 2015-01-30 2015-04-30 implementation The State Administration of Quality Supervision, Inspection and Quarantine released Acoustic emission detector calibration specification Focal point. the National Committee of the acoustic measurement technology The main drafting units. China Institute of Metrology Hubei Provincial Institute of Metrology Participated in the drafting unit. Fujian Institute of Metrology Jiangsu Province Institute of Metrology Suzhou CEPREI Calibration Technology Services Ltd. Qingdao National Marine equipment testing center This specification metering commissioned National Technical Committee is responsible for interpreting acoustics The main drafters of this specification. He Longbiao (China Institute of Metrology) Niu Feng (China Institute of Metrology) Yao Qiuping (Hubei Institute of Metrology) Drafters participate. Lie (Fujian Institute of Metrology) Rong Xia Xun (Jiangsu Province Institute of Metrology) Lvlin Hua (Suzhou CEPREI Calibration Technology Services Ltd.) Lun Zhou Bin (Qingdao National Marine equipment testing center)

table of Contents

Introduction (Ⅱ) 1 Scope (1) 2. References (1) 3 Terms and Definitions (1) 3.1 Acoustic Emission (1) 3.2 acoustic emission signal amplitude (1) 3.3 Threshold (1) 3.4 impact (1) 3.5 Rise Time (1) Duration 3.6 (1) 3.7 Ring Count (2) Crosstalk 3.8 (2) 3.9 Noise (2) 4 Overview (2) 5 Metrological characteristics (2) 5.1 Noise (2) 5.2 Frequency Range (2) 5.3 Dynamic Range (2) Between 5.4 channel crosstalk (2) 5.5 waveform parameters (2) 6 calibration conditions (3) Environmental conditions 6.1 (3) 6.2 standards and other measuring equipment (3) 7 calibration items and calibration methods (3) 7.1 calibration items (3) 7.2 Calibration method (4) 8 calibration results expression (6) 8.1 Calibration Data Processing (6) 8.2 calibration certificate (7) 8.3 calibration measurement uncertainty (7) 9 Recalibration interval (7) Appendix A Recommended acoustic emission detector calibration certificate-page format (8) Appendix B acoustic emission detector calibration Uncertainty Evaluation for instance (10)

Introduction

This specification based JJF 1071-2010 "National Calibration Specifications writing rules" establishment. Making reference to this specification JB/T 8283-1999 "acoustic emission testing equipment performance testing methods" and ASTM E0750-10 "acoustic emission instrument characterization methods" (PracticeforcharacterizingAcousticEmissionIn- strumentation) acoustic emission detector part of the performance parameters and test methods. This specification is the first release. Acoustic emission detector calibration specification

1 Scope

This standard applies to the calibration of acoustic emission detector host, without sensor and preamplifier section. 2. References This specification references the following documents. JJF 1001 common measurement terms and definitions JJF 1034 acoustic measurement terminology and definitions GB 3102.7-1993 Quantities and units of acoustics GB/T 12604.4-2005 Terminology for nondestructive testing - Acoustic emission testing JB/T 8283-1999 acoustic emission detector performance test method ASTME0750-10 acoustic emission instrument characterization methods (PracticeforcharacterizingAcoustic EmissionInstrumentation) For dated references, only the dated edition applies to this specification; undated reference documents Member, the latest edition (including any amendments) applies to this specification.

3 Terms and Definitions

This specification uses quantities and units specified in GB 3102.7-1993. JJF 1001 and JJF 1034 and as defined in the following terms and definitions apply to this specification. 3.1 Acoustic emission acousticemission Rapid release of energy within the material phenomenon generated by transient elastic waves. [GB/T 12604.4-2005, Definition 2.1] 3.2 acoustic emission signal amplitude acousticemissionsignalamplitude The maximum peak voltage amplitude of the waveform acoustic emission signals obtained. Note. Unit V, usually expressed in dB, the reference value 1μV. 3.3 Threshold thresholdvalue A predetermined voltage value, the acoustic emission signal amplitude exceeds the voltage value can be detected, usually in dB Shown, the reference value 1μV. NOTE. The threshold is generally also called threshold. 3.4 strike hit Exceeds the threshold and cause any signal acoustic emission detector channel data collection. 3.5 rise time risetime AE signal exceeds the first threshold value to the maximum amplitude of the elapsed time interval. 3.6 Duration durationtime AE signal exceeds the threshold for the first time to descend to the final time threshold interval. ...