1、BRITISH STANDARD BS 6955-12: 1994 ISO 5347-12: 1993 Calibration of vibration and shock pick-ups Part 12: Method of test for transverse shock sensitivity UDC 534.1:681.327.7:53.089.6BS6955-12:1994 This British Standard, having been prepared under the directionof the General Mechanical Engineering Sta
2、ndards Policy Committee, waspublished under the authorityof the Standards Boardand comes into effect on 15March 1994 BSI 12-1999 The following BSI references relate to the work on this standard: Committee reference GME/21 Draft for comment 87/72304 DC ISBN 0 580 23084 8 Committees responsible for th
3、is British Standard The preparation of this British Standard was entrusted by the General Mechanical Engineering Standards Policy Committee (GME/-) to Technical Committee GME/21, upon which the following bodies were represented: Electricity Association Federation of Civil Engineering Contractors Imp
4、erial College of Science and Technology Institute of Sound and Vibration Research Institution of Mechanical Engineers Lloyds Register of Shipping Ministry of Defence Open University Power Generation Contractors Association PGCA (BEAMA Ltd.) Railway Industry Association of Great Britain Sira Test and
5、 Certification Ltd. Society of British Aerospace Companies Limited The following bodies were also represented in the drafting of the standard, through subcommittees and panels: British Coal Corporation Health and Safety Executive Society of Environmental Engineers University of Cranfield Amendments
6、issued since publication Amd. No. Date CommentsBS6955-12:1994 BSI 12-1999 i Contents Page Committees responsible Inside front cover National foreword ii 1 Scope 1 2 Normative references 1 3 Apparatus 1 4 Preferred pulse durations and accelerations 1 5 Method 1 List of references Inside back coverBS6
7、955-12:1994 ii BSI 12-1999 National foreword This Part of BS 6955 has been prepared under the direction of the General Mechanical Engineering Standards Policy Committee. It is identical with ISO5347-12:1993 Methods for the calibration of vibration and shock pick-ups Part 12: Testing of transverse sh
8、ock sensitivity, published by the InternationalOrganization for Standardization (ISO). ISO 5347-12 was prepared by Technical Committee ISO/TC 108, Mechanical vibration and shock, in which the UK played an active part. BS 6955 consists of the following Parts, which are identical with the correspondin
9、g Parts of ISO 5347: Part 0: Guide to basic principles; Part 1: Methods for primary vibration calibration by laser interferometry; Part 2: Method for primary shock calibration by light cutting; Part 3: Method for secondary vibration calibration; Part 4: Method for secondary shock calibration; Part 5
10、: Method for calibration by Earths gravitation; Part 6: Method for primary vibration calibration at low frequencies; Part 7: Methods for primary calibration by centrifuge; Part 8: Method for primary calibration by dual centrifuge; Part 9: Method for secondary vibration calibration by comparison of p
11、hase angles; Part 10: Method for primary calibration by high impact shocks; Part 11: Method of test for transverse vibration sensitivity; Part 12: Method of test for transverse shock sensitivity; Part 13: Method of test for base strain sensitivity; Part 14: Method of test for resonance frequency of
12、undamped accelerometers on a steel block; Part 15: Method of test for acoustic sensitivity; Part 16: Method of test for mounting torque sensitivity; Part 17: Method of test for fixed temperature sensitivity; Part 18: Method of test for transient temperature sensitivity; Part 19: Method of test for m
13、agnetic field sensitivity. Part 20 of ISO 5347 is in preparation. It is envisaged that when it is published it will be implemented as Part 20 of BS 6955. Cross-references International Standard Corresponding British Standard ISO 5347-0:1987 BS 6955 Calibration of vibration and shock pick-ups Part 0:
14、1988 Guide to basic principles (Identical) ISO 5347-2:1993 Part 2:1994 Method for primary shock calibration by light cutting (Identical)BS6955-12:1994 BSI 12-1999 iii A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible
15、 for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi toiv, pages1and 2, an inside back cover and a back cover. This standard has been updated
16、 (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.iv blankBS6955-12:1994 BSI 12-1999 1 1 Scope ISO 5347 comprises a series of documents dealing with methods for the calibration of vibration and shock pick-ups. This
17、 part of ISO 5347 lays down detailed specifications for the instrumentation and procedure to be used for transverse shock sensitivity testing. It applies to rectilinear accelerometers of the strain gauge, piezoresistive and piezoelectric type. This part of ISO 5347 is applicable for a time rangefrom
18、 0,01 ms to 10 ms and a dynamic range from 100m/s 2to 105 m/s 2 . The limits of uncertainty applicable are 20% of reading. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this part of ISO 5347. At the time of publicati
19、on, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of ISO 5347 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of cur
20、rently valid International Standards. ISO 5347-0:1987, Methods for the calibration of vibration and shock pick-ups Part 0: Basic concepts. ISO 5347-2:1993, Methods for the calibration of vibration and shock pick-ups Part 2: Primary shock calibration by light cutting. 3 Apparatus 3.1 Equipment capabl
21、e of maintaining room temperature at 23 C 3 C. 3.2 Shock calibration equipment, complying with the equipment requirements specified for the comparison calibration method for shock (seeISO5347-0). The shock machine shall have a fixture for transverse shocks on the pick-up. It shall be possible to mou
22、nt the accelerometer at different angles about its sensing axis. 4 Preferred pulse durations and accelerations The following shock pulse durations, in milliseconds, shall be chosen: 0,01; 0,02; 0,05; 1; 2; 5; 10. The following accelerations, in metres per second squared, shall be used: 100; 200; 500
23、; 1 000; 2 000; 5 000; 10 000; 20 000; 50 000; 100 000. 5 Method 5.1 Test procedure Shock-test the pick-up at the same shock pulse times and accelerations as during calibration (seeISO 5347-2) to determine its sensitivity. Determine the direction and magnitude of the maximum and minimum values for t
24、ransverse sensitivity at different angles by shock-testing perpendicularly to the main axis of the pick-up. The values obtained shall be reported as the maximum and minimum values for shock transverse sensitivity. The angles corresponding to maximum and minimum values shall be reported. 5.2 Expressi
25、on of results Calculate the transverse sensitivity, S trans , expressed as a percentage, using the following formula: where A trans is the transverse response amplitude; A is the shock pulse amplitude in the test direction. S trans A trans A - 100 =2 blankBS6955-12:1994 BSI 12-1999 List of reference
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