METHOD FOR MEASURING THE LENGTH OF A METAL PIPE Russian patent published in 2022 - IPC G01B7/02 

FIELD: measuring technology.

SUBSTANCE: invention relates to measuring technology and can be used for non-contact determination of the length of metal pipes, both finished products and in their production at metallurgical, machine-building enterprises. The effect is achieved by the fact that in the method for measuring the length of a metal pipe, in which the controlled product is placed in the measuring section isolated above a grounded metal plane, electromagnetic oscillations are excited in the first radio wave resonator in the form of a segment of a long line, open at the ends and formed by a combination of conductors - a metal pipe and this plane, and measure the resonant frequency ƒ₁ of electromagnetic oscillations of this segment of a long line, additionally excite electromagnetic oscillations in the second radio wave resonator located within the measuring section and filled with the environment in the measuring section, and measure the resonant frequency ƒ₂ of electromagnetic oscillations of this resonator, joint conversion of the measured resonant frequencies ƒ₁ and ƒ₂ is carried out according to the relation

,

n=1, 2, …, where ƒ₂₀ is the value ƒ₂ of the second radio wave resonator not filled with the medium, c is the speed of light, the result of which is used to judge the length of the metal pipe.

EFFECT: simplification of the process of measuring the length of a metal pipe.

1 cl, 1 dwg