PROCEDURE MEASURING SPATIAL DISTRIBUTION OF TEMPERATURE ( VERSIONS ) AND FACILITY FOR ITS REALIZATION Russian patent published in 2002 - IPC

FIELD: measurement technology, determination of temperature in assemblage of points. SUBSTANCE: procedure measuring spatial distribution of temperature according to first version is carried out by placement of assemblage of temperature-sensitive elements connected in parallel by two-wire line in check points, by supply of alternating voltage signal to one input of line and by recording input alternating current i_in(t). Quartz piezoresonance pickups with different resonance frequencies ω_r1, ω_r2,...ω_ri,...ω_rN, are employed as temperature-sensitive elements. Signal with spectrum overlapping frequency range of quartz piezo-resonance pickups is used in the capacity of alternating voltage signal supplied to one input of two-wire line. In correspondence with second version procedure measuring spatial distribution of temperature is realized by placement of assemblage of temperature-sensitive elements in check points and by use of signal with frequency modulation in range of resonance frequencies of quartz piezoresonance pickups in the capacity of alternating voltage signal supplied to one input of two-wire line. Facility for realization of procedure measuring spatial distribution of temperature includes assemblage of temperature- sensitive elements connected in parallel with the help of two-wire line connected to resistor which is coupled to source of alternating voltage. Quartz piezo-resonance pickups with different resonance frequencies ω_r1, ω_r2,...ω_ri,...ω_rN, are employed as temperature- sensitive elements, recorder incorporates matching circuit, register of amplitude of alternating current, spectrum analyzer, processing and indication unit connected in series. Signal generator with spectrum overlapping frequencies of quartz piezo- resonance pickups is utilized in the capacity of source of alternating voltage. EFFECT: increased accuracy and noise immunity, expanded temperature measurement range of spatial distribution of temperature field. 3 cl, 3 dwg