MECHANICAL STRESS SENSOR

摘要

Field of the Invention. This invention relates to technical diagnostics and nondestructive control of materials and can be used for the construction and operation of measuring devices, more specifically, mechanical stress sensors.;Disclosure of the Invention. The technical result achieved by the invention is an increase the sensor functionality by making it capable of measuring signals caused by local mechanical loads and detecting various types of mechanical loads, e.g. tension, compression and torsion, as well as reducing the effect of noise and increasing the sensitivity.;Said technical result is achieved as follows.;The mechanical stress sensor disclosed herein comprises a rectangular plate of a polymer material. The top surface of the rectangular plate has a seat in the form of a centrally symmetric cavity where the detector is located.;Inside the body of said rectangular plate, along the central longitudinal axis and parallel to the top and bottom planes, there is a magnetosensitive element based on a preliminary tensile amorphous ferromagnetic microwire.;Said magnetosensitive element is located inside a differential measuring coil and connected to the first pair of contact pads via printed conductors.;Said differential measuring coil is connected, via printed conductors, to the second pair of contact pads. Furthermore, both pairs of contact pads are located inside the cavity and connected to the detector.;The detector comprises an alternating current source, a direct current source and a measuring coil signal amplifier. The alternating current source is connected to the magnetic field source. The direct current source is connected to the first pair of contact pads. The measuring coil signal amplifier input is connected to the second pair of contact pads, and the measuring coil signal amplifier output is connected to an analog to digital converter coupled with a personal computer.

主权项

1. A mechanical stress sensor disclosed herein comprising a rectangular plate of a polymer material the top surface of said rectangular plate having a seat in the form of a centrally symmetric cavity where the detector is located, wherein inside the body of said rectangular plate, along the central longitudinal axis and parallel to the top and bottom planes, there is a magnetosensitive element in the form of a preliminary tensile amorphous ferromagnetic microwire located inside a differential measuring coil and connected to the first pair of contact pads via printed conductors, said differential measuring coil being connected, via printed conductors, to the second pair of contact pads, further wherein both pairs of contact pads are located inside the seat and connected to the detector comprising an alternating current source connected to the magnetic field source, a direct current source connected to the first pair of contact pads and a measuring coil signal amplifier whose input is connected to the second pair of contact pads and output is connected to an analog to digital converter coupled with a personal computer.