ImageVerifierCode 换一换
格式:PDF , 页数:6 ,大小:139.33KB ,
资源ID:169080      下载积分:14 积分
快捷下载
登录下载
邮箱/手机:
温馨提示:
快捷下载时,用户名和密码都是您填写的邮箱或者手机号,方便查询和重复下载(系统自动生成)。 如填写123,账号就是123,密码也是123。
特别说明:
请自助下载,系统不会自动发送文件的哦; 如果您已付费,想二次下载,请登录后访问:我的下载记录
支付方式: 支付宝扫码支付 微信扫码支付   
验证码:   换一换

加入VIP,免费下载
 

温馨提示:由于个人手机设置不同,如果发现不能下载,请复制以下地址【https://www.wnwk.com/docdown/169080.html】到电脑端继续下载(重复下载不扣费)。

已注册用户请登录:
账号:
密码:
验证码:   换一换
  忘记密码?
三方登录: QQ登录  

下载须知

1: 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007和PDF阅读器。
2: 试题试卷类文档,如果标题没有明确说明有答案则都视为没有答案,请知晓。
3: 文件的所有权益归上传用户所有。
4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
5. 本站仅提供交流平台,并不能对任何下载内容负责。
6. 下载文件中如有侵权或不适当内容,请与我们联系,我们立即纠正。
7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。

版权提示 | 免责声明

本文(ASTM_E_1629_-_12.pdf)为本站会员(益****师)主动上传,蜗牛文库仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对上载内容本身不做任何修改或编辑。 若此文所含内容侵犯了您的版权或隐私,请立即通知蜗牛文库(发送邮件至admin@wnwk.com或直接QQ联系客服),我们立即给予删除!

ASTM_E_1629_-_12.pdf

1、Designation:E162912Standard Practice forDetermining the Impedance of Absolute Eddy-CurrentProbes1This standard is issued under the fixed designation E1629;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A nu

2、mber in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This practice covers a procedure for determining theimpedance of absolute eddy-current probes(bridge-type,air orferrite core,wire wound,shie

3、lded,or unshielded)used forfinding material defects in electrically conducting material.This practice is intended to establish a uniform methodology tomeasure the impedance of eddy-current probes prior to receiptof these probes by the purchaser or the specifier.1.2 LimitationsThis practice does not

4、address the charac-terization or measurement of the impedance of differential,a-ccoupled,or transmit/receive types of probes.This practice doesnot address the use of magnetic materials in examinationprobes.This practice shall not be used as a basis for selectionof the best probe for a particular app

5、lication or as a means bywhich to calibrate or standardize a probe for a specificexamination.This practice does not address differences in theimpedance values that can be obtained when the probe andmaterial are in relative motion,as in a rotating probe,since theprocedure described here requires the

6、probe and material to bestationary.1.3 UnitsThe values stated in SI units are to be regardedas the standard.The values given in parentheses are mathemati-cal conversions to inch-pound units that are provided forinformation only and are not considered standard.1.4 This standard does not purport to ad

7、dress all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 The following document forms a p

8、art of this practice tothe extent specified herein:2.2 ASTM Standards:E1316 Terminology for Nondestructive Examinations23.Terminology3.1 DefinitionsDefinitions of terms relating to electromag-netic examination are given in Terminology E1316.3.2 Definitions of Terms Specific to This Standard:3.2.1 ed

9、dy-current reference standard for the purposes ofthe method described in this practice,a rectangular block madeof an aluminum alloy(see 6.1.2)to which an active eddy-current probe is applied.The eddy-current reference standardcan also be referred to as an eddy-current test block.3.3 Mathematical Sym

10、bols:3.3.1 ja symbol used in electrical engineering to represent=21.It is associated with the restriction to the flow ofelectrical current caused by capacitors and coils.3.3.2 N any number.3.3.3|N|the magnitude of N,regardless whether N ispositive,negative,or a vector quantity.3.3.4=N the square roo

11、t of N.3.3.5(N)2N squared,that is,N N.3.3.6 N delta N,the change or difference in N.3.4 Abbreviations:3.4.1 tanused for the tangent function.The tan1,arctangent or inverse tangent function,returns a value that is ameasure of an angle and can be in either degrees or radians.When using a calculator to

12、 determine the tan1,care should betaken to determine whether the answer is in degrees or radianssince the numerical values that represent the same angle aredifferent.3.4.2 cosused for the cosine function.3.4.3 sinused for the sine function.4.Significance and Use4.1 Eddy-current probes may be used fo

13、r the nondestructiveexamination of parts or structures made of electrically conduct-ing materials.Many of these examinations are intended to1This practice is under the jurisdiction of ASTM Committee E07 on Nonde-structive Testing and is the direct responsibility of Subcommittee E07.07 onElectromagne

14、tic Method.Current edition approved Nov.1,2012.Published November 2012.Originallyapproved in 1994.Last previous edition approved in 2007 as E1629-07.DOI:10.1520/E1629-12.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual B

15、ook of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 discover material def

16、ects,such as cracks,that may cause thepart or structure to be unsafe or unfit for service.Eddy-currentprobes that fail to meet the performance level requirements ofthis practice shall not be used for the examination of materialor hardware unless the probe is qualified by some other systemor an agreement has been reached by the probe manufacturerand the purchaser,or both.5.General Practice5.1 Use of Eddy-Current Reference StandardsThe eddy-current reference standards described in this practice sh

copyright@ 2008-2023 wnwk.com网站版权所有

经营许可证编号:浙ICP备2024059924号-2