ISO 10878:2013 pdf free

ISO 10878:2013 pdf free.Non-destructive testing一Infrared thermography一Vocabulary
set of objects and the atmosphere in the vicinity of a test object that is observed by an infrared camera and which can affect the thermal pattern of the test object
plane perpendicular to the sight direction of a radiation thermometer that is in focus for that instrument
diameter of a circle in the target plane of a radiation thermometer that is centred on its sight direction and which contains 99 % of the input radiant power received by that instrument
signal-processing method to obtain a picture of the change of the sum of principal stresses, consisting of measuring temperature distribution images during the maximum temperature period and the minimum temperature period, and making an overall “temperature range image” from the images
NOTE Range means the total amplitude.
reading change (error) in time when observing a target with non-varying temperature, which can be caused by a combination of ambient factors and variation in voltage and instrument characteristics
instability of a blackbody radiator temperature, i.e. standard deviation of blackbody radiator temperature values measured every 10s to 15s during 15 min to 20 min with reference to their arithmetic mean value during the same period
minimum simulated or actual change in the target temperature that produces a temperature signal identified by an observer (typically, at the signal-to-noise ratio equal to unity)
NOTE This is equivalent to NETD. See NETD.
degree of detectable temperature difference between adjacent areas or objects having unequal temperatures at a particular moment
NOTE Thermal contrast is a processing technique used to enhance target visibility. In its simplest form, a thermal contrast is computed by calculating the difference between the temperature of the target and the temperature of a (sound) reference area.
mode of energy flow that occurs by emission and absorption of electromagnetic radiation, propagating at the speed of light
NOTE Unlike conductive and convective heat flow, thermal radiation is capable of propagating across a vacuum, a form of heat transfer which allows IRT to work since infrared energy travels from the target to the detector by radiation.
smallest apparent temperature difference between two blackbodies that can be measured by an infrared sensing device
device producing a special thermal pattern of a specific spatial frequency, shape or temperature on a uniformly radiating background with known temperature and emissvity of both the object and the background
processing technique used in pulsed thermography and in which data are analysed by reference to a particular instant of interest such as the time of maximum thermal contrast.ISO 10878 pdf download.