Abstract
Fiber Bragg grating (FBG) acoustic emission (AE) sensors have been used in many applications. In this paper, based on an FBG AE sensor, the sensing principle of the interaction between the AE wave and the sensor is introduced. Then, the directionality of the FBG AE sensor on the surface of a thin polymer-bonded explosive (PBX) material is studied. Finally, the time coefficient location method is proposed to correct the AE time detected by the FBG AE sensor, thereby improving the accuracy of location experiments.
Highlights
Polymer-bonded explosive (PBX) materials are popular materials for use in weapons because of their advanced high-energy performance
The four-channel Fiber Bragg grating (FBG) Acoustic emission (AE) sensor system is shown in Figure 5, in which the tunable narrowband laser light is divided into L1, L2, L3 and L4 by coupler 1, coupler 2 and coupler 3
The reflected light with the AE wave signal from FBG AE sensor 1 is detected by photodetector 1, and the signal is amplified by preamplifier 1 and reaches the acquisition system
Summary
Polymer-bonded explosive (PBX) materials are popular materials for use in weapons because of their advanced high-energy performance. The optic fiber sensor a new kind sensor that a small size, light weight, high high sensitivity, anti-electromagnetic interference capability, and corrosion resistance. One type is fiber-optic cavity AE technology, which has a wide measurement range and a stable system but is difficult to. P cavity AE technology, which has a wide measurement range and a stable system but is difficult produce and expensive [7] Another type is fiber-optic ring AE technology, which has higher sensitivity to to produce and expensive [7].[7]. The final type is the is is fiber-optic coupler technology, butbut thethe sensor itself is is tootoo frail to to use in in practice [12,13].
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