Strain measurement is an important component in model tests of combustible internal explosions. Strain gauges are used to\nmeasure strain in traditional electrical measurement methods and have some limitations, such as susceptibility to electromagnetic\ninterference, short life, and inability to distribute. Fiber Bragg gratings (FBGs) are developing into useful sensing tools that can\nrespond to changes in stress, strain, and temperature by changing wavelengths. FBGs have excellent sensing performance, such as\nlong life, antielectromagnetic interference, easy networking, and good reusability. In this paper, FBG sensors are applied to strain\nmonitoring in ethylene flammable implosion experiments. In the ethylene flammable implosion tests, an FBG was placed on the\ninner surface of the bottom plate of the rectangular steel test device near the detonation vent by the sticking method. -e reliability\nand repeatability of the strain change of the FBG affected by detonation overpressure and combustion were tested at this point.\nFour explosion tests were carried out. -e test results showed that FBG sensors could obtain stable and reliable strain data in all\nfour tests. -e strain variation reflects the development of overpressure and combustion in the whole process from ignition. For\nthe strain amplitude formed by overpressure, the minimum was........................
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