应用比色测温法测量热电偶激励温度的方法研究
Abstract
Thermocouplesarewidelyusedfortransienthigh-temperaturemeasurementinextreme
environmentsduetostableperformance,fastresponse,hightemperatureresistance,large
measurementrange,andsimplestructureandeasyinstallation.However,whenthe
thermocouplemeasuresthetemperature,thereisaheattransferprocesswiththemeasured
object,andthethermalinertia,limitedheatconduction,andhousingpackagingofthe
thermocouplesensorwillcausedynamicresponseerrors,sothatthemeasuredtemperatureis
differentfromtherealtemperature.Inordertoreducethedynamicerrorofthethermocouple
andimprovetheaccuracyoftemperaturemeasurement,itisusuallynecessarytodynamically
calibratethethermocouple.Thelaserheatingmethodisadynamiccalibrationmethodfor
thermocouples,andthetraditionallasermethoddynamiccalibrationsystemusesa
single-bandinfraredthermometrymethodtomeasuretheexcitationtemperatureofthesurface
ofthethermocouple,whichrequiresaknownsurfaceemissivityofthethermocouple,andthe
emissivityofthematerialisaffectedbyavarietyoffactorsandisusuallynoteasytoobtain.
Inordertoimprovethelaserdynamiccalibrationsystem,eliminatethecalibrationprocessof
thermocouplesurfaceemissivity,andimprovetheaccuracyoftemperaturemeasurement,a
newtemperaturemeasurementmethodneedstobestudied.
Inordertomeetthisdemand,thispaperstudiesthemeasurementofthermocouple
surfacetemperaturebyusingthemethodofcolorimetricthermometry,anddevelopsa
colorimetricthermometrysystem.Theresearchcontentsincludetheselectionofdual-bandof
colorimetricthermometry,thedevel