METHOD MEASURING SPATIAL DISTRIBUTION OF TEMPERATURE AND DEVICE FOR ITS REALIZATION Russian patent published in 2003 - IPC

FIELD: measurement technology, determination of temperature in aggregate of points. SUBSTANCE: in correspondence with method of spatial distribution of temperature N temperature-sensitive elements connected in parallel by two-wire line are placed in controlled points. Quartz piezoresonance pickups with different resonance frequencies are employed in the capacity of temperature-sensitive elements. After registration of input alternating current i_in(t) its amplitude-frequency spectrum S(ω) is calculated. Then first measurement of resonance frequencies of quartz piezoresonance pickups is conducted by position of maximum of amplitude-frequency spectrum S(ω). There upon input alternating current S(ω) in two-wire line is recorded, its amplitude-frequency spectrum i_in(t) is calculated and second measurement of resonance frequencies of quartz piezoresonance pickups is executed by positions of maximum of amplitude-frequency spectrum S(ω) proceeding from which sought-for temperature in controlled points is found with the aid of experimentally found or theoretically known dependencies of resonance frequency of quartz piezoresonance pickups on temperature ω_pi(t).. Device measuring spatial distribution of temperature has N temperature-sensitive elements connected in parallel by two-wire line, recorder and source of alternating voltage. Generator of multifrequency signal is used as source of alternating voltage. EFFECT: enhanced accuracy, noise immunity and expanded temperature range of measurement of spatial distribution of temperature. 4 dwg