DIN 4569-1996 梯级.概念.功能尺寸.要求.检验
时间:2024-05-16 21:37:02 来源: 标准资料网 作者：标准资料网 阅读：9715
【英文标准名称】:Steps-Termsfunctionalsizes,requirements,testing
【原文标准名称】:梯级.概念.功能尺寸.要求.检验
【标准号】:DIN4569-1996
【标准状态】:作废
【国别】:德国
【发布日期】:1996-01
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:安全要求;踏阶;梯子;爬高装置;作标记;踏步(楼梯);踏步平板;检验;设备安全;作用尺寸;安全工程;木材;凳子;安全;工作场所安全;使用说明;尺寸;定义;试验;设计;材料;职业安全;规范(验收)
【英文主题词】:
【摘要】:
【中国标准分类号】:P32
【国际标准分类号】:97_140
【页数】:9P;A4
【正文语种】:德语
【英文标准名称】:StandardPracticeforManufacturingCharacterizationofDigitalDetectorArrays
【原文标准名称】:数字探测器阵列设定的标准方法
【标准号】:ASTME2597-2007e1
【标准状态】:现行
【国别】:美国
【发布日期】:2007
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:E07.01
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:badpixels;basicspatialresolution;burn-in;contrastsensitivity;DDA;efficiency;imagelag;normalizedSNR;SNR;specificmaterialthicknessrange;Contrastsensitivity;Digitaldetectorarrays;Efficiency;Manufacturingprocesses;Spatialresolution
【摘要】:ThispracticeprovidesameanstocompareDDAsonacommonsetoftechnicalmeasurements,realizingthatinpracticeadjustmentscanbemadetoachievesimilarresultsevenwithdisparateDDAsgivengeometricmagnification,orotherindustrialradiologicsettingsthatmaycompensateforoneshortcomingofadevice.AusermustunderstandthedefinitionsandcorrespondingperformanceparametersusedinthispracticeinordertomakeaninformeddecisiononhowagivenDDAcanbeusedinthetargetapplication.ThefactorsthatwillbeevaluatedforeachDDAare:basicspatialresolution(SRb),efficiency(DetectorSNR-normalized(dSNRn)at1mGy,fordifferentenergiesandbeamqualities),achievablecontrastsensitivity(CSa),specificmaterialthicknessrange(SMTR),imagelag,burn-in,badpixelsandinternalscatterradiation(ISR).1.1ThispracticedescribestheevaluationofDigitalDetectorArrays(DDAs),andassuresthatonecommonstandardexistsforquantitativecomparisonofDDAssothatanappropriateDDAisselectedtomeetNDTrequirements.1.2ThispracticeisintendedforusebymanufacturersorintegratorsofDDAstoprovidequantitativeresultsofDDAcharacteristicsforNDTuserorpurchaserconsumption.Someofthesetestsrequirespecializedtestphantomstoassureconsistencyamongresultsamongsuppliersormanufacturers.Thesetestsarenotintendedforuserstocomplete,noraretheyintendedforlongtermstabilitytrackingandlifetimemeasurements.However,theymaybeusedforthispurpose,ifsodesired.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:C43
【国际标准分类号】:11_040_50
【页数】:19P.;A4
【正文语种】:英语