ASTM E1862-1997(2002)e1 Standard Test Methods for Measuring and Compensating for Reflected Temperature Using Infrared Imaging Radiometers《用红外成像辐射仪测量和均衡反射温度的标准试验方法》.pdf
《ASTM E1862-1997(2002)e1 Standard Test Methods for Measuring and Compensating for Reflected Temperature Using Infrared Imaging Radiometers《用红外成像辐射仪测量和均衡反射温度的标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM E1862-1997(2002)e1 Standard Test Methods for Measuring and Compensating for Reflected Temperature Using Infrared Imaging Radiometers《用红外成像辐射仪测量和均衡反射温度的标准试验方法》.pdf(3页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: E 1862 97 (Reapproved 2002)e1Standard Test Methods forMeasuring and Compensating for Reflected TemperatureUsing Infrared Imaging Radiometers1This standard is issued under the fixed designation E 1862; the number immediately following the designation indicates the year oforiginal adoptio
2、n or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.e1NOTERemoved Footnote 2 in September 2002 since the organization is no longer in busi
3、ness.1. Scope1.1 These test methods cover procedures for measuring andcompensating for reflected temperature when measuring thesurface temperature of a specimen with an infrared imagingradiometer.1.2 These test methods may involve use of equipment andmaterials in the presence of heated or electrical
4、ly energizedequipment, or both.1.3 This standard does not purport to address 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 limitatio
5、ns prior to use.2. Referenced Documents2.1 ASTM Standards:2E 1316 Terminology for Nondestructive Examinations3. Terminology3.1 Definitions:3.1.1 diffuse reflector, na surface that produces a diffuseimage of a reflected source.3.1.2 infrared thermographer, nthe person using an infra-red imaging radio
6、meter.3.1.3 infrared reflector, na material with a reflectance asclose as possible to 1.00.3.1.4 reflected temperature, nthe temperature of the en-ergy incident upon and reflected from the measurement surfaceof a specimen.3.1.5 specular reflector, na surface that produces a directimage of a reflecte
7、d source.3.2 See also Terminology E 1316.4. Summary of Test Methods4.1 Two test methods are given for measuring the reflectedtemperature of a specimen, the Reflector Method and theDirect Method.4.2 A test method is also given for compensating for theerror produced by reflected temperature using the
8、computerbuilt into an infrared imaging radiometer.5. Significance and Use5.1 The infrared energy that is reflected by a specimen cancause measurement errors for an infrared thermographer mea-suring its surface temperature. Two test methods are providedfor measuring and compensating for this reflecte
9、d temperatureerror source, the Reflector Method and the Direct Method.5.2 These test methods can be used in the field or laboratoryusing commonly available materials.5.3 These test methods can be used with any infraredradiometers that have the required computer capabilities.1These test methods are u
10、nder the jurisdiction of ASTM Committee E07 onNondestructive Testing and are the direct responsibility of Subcommittee E07.10 onEmerging NDT Methods.Current edition approved April 10, 1997. Published June 1997.2Annual Book of ASTM Standards, Vol 03.03.1Copyright ASTM International, 100 Barr Harbor D
11、rive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6. Interferences6.1 Reflector Method:6.1.1 This test method uses an infrared reflector with anassumed reflectance of 1.00, which is an ideal property. Errorscan be minimized by using a reflector having a reflectance asclose as possib
12、le to 1.00.6.1.2 Specimens vary in that they can be diffuse or spectralreflectors, or both. Use of an infrared reflector with reflectanceproperties as close as possible to those of the specimen willreduce errors.6.2 Direct Method:6.2.1 The Direct Method usually does not account for theheat from the
13、infrared thermographers body as a source ofreflected temperature. If this heat source creates a significanterror, use the Reflector Method.6.3 Reflected temperature errors produced by a pointsource, such as the sun or a lamp, are difficult to measureaccurately. These error sources can often be avoid
14、ed by movingthe infrared imaging radiometers position and angle relative tothe specimen.6.4 The measured reflected temperature of a specimen maybe specific to the waveband of the infrared imaging radiometerused. Therefore, the infrared imaging radiometers wavebandshould be noted with the measured va
15、lue.6.5 The significance of the error contributed by reflectedtemperature can be estimated by shielding the specimen fromvarious angles and observing any changes in the thermalimage.6.6 The error caused by reflected temperature can be re-duced by shielding the specimen from the source of thereflecti
16、on.7. Apparatus7.1 Calibrated Infrared Imaging Radiometer, with a built-incomputer with the capability to measure temperatures with thecomputers emissivity control set to 1.00.7.2 Tripod, or device to support the infrared imaging radi-ometer.7.3 Infrared ReflectorThe reflector method also requiresan
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