METHOD FOR MEASURING FIELD PROFILE CHANGE OF PHYSICAL QUANTITY Russian patent published in 2017 - IPC G06F17/14 

FIELD: measuring equipment.

SUBSTANCE: when performing the method for measuring the field profile change of a physical quantity, distributed sensors with a variable linear sensitivity function are used. The linear sensitivity function of these distributed sensors is carried out by the weight functions of spatial multiband filter-sensors whose transmission boundaries are set in accordance with the covering of a subset of the unit vector numbers of the Fourier series with the v-th value of the s-th digit of the b-ary code of the unit vector number from 0 to N-1. The weight functions of the multiband filter-sensors are performed equal to the sum of the values of the normalized unit vectors in the transmission bands. The expansion coefficients by the unit vectors of the profile change for a given time are determined by convolving during this time the output signals of the multiband filter-sensors corresponding to the values of the b-ary n-th bit code of the unit vector number. The convolution operations are performed simultaneously by the tree-like scheme of the b-ary decoder of the unit vector coefficients. The field profile change of a physical quantity θ(x, t, T) during the time T Is calculated by the formula where x is the spatial coordinate on the profile from 0 to L; t - the current time; T - the external integration time for which the change in the field profile of a physical quantity is measured; ϕ_I(X) - the unit vector of the Fourier series approximating the profile θ(x); i - the number of the unit vector in a b-ary code; and_i(t,T) - the current change in the expansion coefficient of the profile by the unit vector ϕ_i(x) during the time T.

EFFECT: increasing the accuracy and spatial resolving power of measurements.

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