Electromagnetic sensor for measuring internal stresses in a ferromagnetic rod element of a building structure

摘要

The utility model relates to the field of measuring instruments, namely to instruments for continuous monitoring of ferromagnetic bar elements of building structures under the influence of tensile-compression forces. The technical result is an increase in the reliability of the sensor design due to the absence of detachable and movable elements, as well as ensuring a continuous monitoring process at high reliability due to the stationary installation of the sensor on the investigated rod element and taking into account the temperature at each measurement of the magnitude of internal stresses in the rod element. The electromagnetic sensor for measuring internal stresses in the ferromagnetic rod element of the building structure includes an internal sensor frame for placing the rod element with a temperature sensor built into it, two located one under the other, isolated from each other, primary and secondary concentric windings, fixed over the frame, and the outer shell of the sensor, while D1 = D2 + 2 x l, D2 = D + 2xL, where D is the diameter of the bar element, D1 is the diameter of the primary winding, D2 is the diameter of the secondary winding, L is the wall thickness of the inner frame of the sensor, l is the thickness of the secondary winding, 4 ill.