METHOD FOR NON-DESTRUCTIVE QUALITY CONTROL OF THE DESIGN AND RESOURCE OF AN AUTOMOTIVE GAS CYLINDER MADE OF POLYMER COMPOSITE MATERIALS AND A DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2023 - IPC G01N25/72 

FIELD: measuring technology.

SUBSTANCE: invention relates to the field of measuring technology and can be used to assess the reliability of complex spatial structures made of polymer composite materials (PCM), including with metal elements, based on the results of monitoring the amount of deformation when they are loaded with static or dynamic load. Essence: optical fibers with fiber-optic Bragg gratings (FBG) are placed in the PCM structure during its manufacture, while the FBG are located in the least durable places of the structure, measurement of the spectral position of the peaks of the FBG after the manufacture of the PCM structure, determination of deformations inside the PCM structure by solving the corresponding system of equations describing the mathematical relationship between the optical characteristics of optical fibers with FBG and the deformation of the product. After placing in the PCM structure in the process of its manufacture of optical fiber with the FBG, while the FBG are located in the least durable places of the structure, without removing the cylinder from the car, the residual deformation δ_ij is measured after the first loading cycle “loading-unloading”, in this case i = 1, by connecting to a fiber optic line located in a cylinder, a special measuring device. Without removing the cylinder from the car, the residual deformation δ_ij is measured after each loading cycle ”loading-unloading”, the coefficient of change in the rate of change between cycles of residual deformation is measured, the value of the internal stress of the material at the point of deformation measurement is measured, the coefficient of quality and reliability of the cylinder design during operation and its service life are determined.

EFFECT: improving the quality of reliable diagnostics of the design of an automobile gas cylinder made of polymer composite material and assessing their resource during operation on a vehicle without removing under repeated loading and the possibility of practical application for a wide range of objects operated under constant and variable loads using simple and precise equipment.

3 cl, 7 dwg