Strain Monitoring of Combustible Gas Implosion Test Based on Fiber Bragg Grating

Table 5

Comparison of the overpressure strain results of the four tests.

Number	Initial strain of grating (average of the first 100 data) (με)	Minimum compressive strain (με)	Time from the vent opening to the full extent (ms)
First test	−2.212	−5.907	600
Second test	12.226	1.969	161
Third test	16.425	14.976	140
Fourth test	17.728	−30.453	109