METHOD FOR MEASURING THE SPECTRUM OF DISTRIBUTED THERMOMECHANICAL EFFECTS Russian patent published in 2022 - IPC G01B11/16 G01L1/16 

FIELD: measuring technology.

SUBSTANCE: invention relates to measuring technology. According to the method for measuring the spectrum of distributed thermomechanical action, a fiber-optic piezoelectroluminescent (PEL) sensor is used, the value of the parameter J(α_reg) of the intensity I of the integral luminous flux of the type I(t,a_reg) is regulated at the output of the fiber through the set values of the parameter α_reg of the control electric voltage U_reg(t) at the outputs of a two-wire electric line connected to an external power source, finding the spectrum ƒ_ζ of distributed thermomechanical action ζ( (z) along the longitudinal coordinate z of the fiber-optic PEL sensor from the solution of the Fredholm integral equation of the 1^st kind using the measured function J(α_reg), the dependence of the intensity parameter J of the light flux at the output of the optic fiber from the control parameter α_reg. What is new is that the indicator coating is used as a “coating/sensor” system in the form of a polymer layer with a fiber-optic PEL sensor placed in it in the form of a spiral, and the spectrum of distributed thermomechanical action acting on the outer surface of the indicator coating is found from the solution of the Fredholm integral equation of the 1^st kind, in which the left part ƒ_ζ, this is the previously found spectrum of a distributed thermomechanical effect acting directly on the sensor itself, the Fredholm core is found using the known dependence of the magnitude of the direct effect on the sensor ζ (ρ) from the distance ρ to the point of application of a single thermomechanical effect on the surface of the indicator coating.

EFFECT: increase in the accuracy of finding the spectrum of distributed thermomechanical action on the surface of the indicator coating.

1 cl, 6 dwg