초록 ▼

A system and method for optically measuring simultaneously the emissivity and temperature of an object and the ambient temperature with a successive determination of values of spectral radiance or spectral radiant intensity in n wavelength bands in the visible and/or infrared radiation bands and wit

A system and method for optically measuring simultaneously the emissivity and temperature of an object and the ambient temperature with a successive determination of values of spectral radiance or spectral radiant intensity in n wavelength bands in the visible and/or infrared radiation bands and with m temperatures of the object, by obtaining m rows of at least n=4 values of spectral radiance or spectral radiant intensity from the measurements of at least m=3 different temperatures of the object, forming from the rows a set of equations with nㆍm=12 unknowns and nㆍm measured values, expressing through a set of equations L1M,li=tQSTiㆍriti{eiㆍLTOBj,li+(1-ei)(LTAmb,l+rQSTiㆍWQㆍLTQ1, li)} L2M,li=tQSTiㆍriti{eiㆍLTOBj, li+(1-ei)(L TAmb,li+rQSTiㆍWQㆍLTQ2, li)} the measured values with the aid of the Planck radiation law as sum of the spectral radiance or spectral radiant intensity of a radiation source with the temperature, the spectral emissivity (ei) of the object, and the spectral radiance or spectral radiant intensity of a radiation source of ambient influences with the ambient temperature which is reflected by the object with the spectral reflectivity of the object (ri=1-ei) [unity minus spectral emissivity]at n measuring wavelengths (li), multiplying the sum with a product (riㆍti) of the spectral sensitivity (ri) of the measuring object and the transmission (ti) of the atmosphere wtih determining the product also at the n measuring wavelengths li(i=1, . . . , n), and solving the set of nㆍm equations interatively to determine simultaneously the m different object temperatures, the n different values of spectral emissivity of the object, the ambient temperature, and the n different values of the product (riㆍti).

대표청구항 ▼

An apparatus for optically measuring simultaneously the emissivity and temperature of an object by consecutively determining the values of spectral radiance in n wavelength region in ultraviolet, visible and infrared bands, comprising: a telescope for viewing the object; a spectral measuring device

An apparatus for optically measuring simultaneously the emissivity and temperature of an object by consecutively determining the values of spectral radiance in n wavelength region in ultraviolet, visible and infrared bands, comprising: a telescope for viewing the object; a spectral measuring device optically coupled to the output of said telescope, said spectral measuring device including m(m>1) radiation sources (Q1-Qm), and a beam splitter located between the telescope and the spectral measuring device, through which consecutively, the radiation of one of the m radiation sources (Q1-Qm) is directed via the telescope onto the object, and, collecting through the same optical system the received radiation and directing the received radiation to the spectral measuring device; an analog-to-digital converter electrically connected to said spectral measuring device; and, a timing logic circuit having a clock, said logic circuit having its input electrically connected to said spectral measuring device, and its output electrically connected to the analog-to-digital converter for producing clock pulses to said converter in response to said spectral measuring device; and, a microprocessor with a command input and indicator connected to said analog-to-digital converter.