Fiber grating acceleration transducer based on metal bellows structure

[0020] exist figure 1 Among them, a fiber grating acceleration sensor based on a metal bellows structure in this embodiment is connected by a metal bellows 1, a vibration sensing fiber grating 2, a mass 3, an end cover 4, a sealing cover 5, a sensor connector 6, and a housing 7 constitute.

[0021] The shell 7 of this embodiment is a cylindrical structure, and the upper end of the metal bellows 1 is bonded to the lower surface of the inner top of the shell 7 with 502 glue. The metal bellows 1 is a beryllium bronze metal bellows, and the inner diameter of the metal bellows 1 is 18mm. , The outer diameter is 24mm, the wave pitch is 5mm, the wave thickness is 0.12mm, and the wave number is 9. The lower end of the metal bellows 1 is pasted with 502 glue to fix the quality block 3. The 502 glue is a commodity sold in the market and produced by Taizhou Jiaojiang Tuopu Adhesive Factory. The center of the quality block 3 is processed with a through hole. The mass in this embodiment ...

[0024] In this embodiment, the upper end of the metal bellows 1 is bonded to the lower surface of the inner top of the housing 7 with 502 glue, and the lower end of the metal bellows 1 is fixed to the mass block 3 with 502 glue. The inner diameter of the metal bellows 1 is 18mm , the outer diameter is 24mm, the wave pitch is 5mm, the wave thickness is 0.14mm, the wave number is 10, the quality of the mass block 3 is 15g, and the distance between the upper surface of the end cover 4 and the lower surface of the mass block 3 is 10mm. A vibration sensing fiber grating 2 is installed in the metal bellows 1, and the upper part of the optical fiber of the vibration sensing fiber grating 2 is led out from the central through hole of the housing 7 and fixed on the central hole of the outer surface of the housing 7 with 502 glue. The lower part of the optical fiber of the fiber grating 2 passes through the central through hole of the mass block 3 and is pasted and fixed on the central t...

[0026] In this embodiment, the upper end of the metal bellows 1 is bonded to the lower surface of the inner top of the housing 7 with 502 glue, and the lower end of the metal bellows 1 is fixed to the mass block 3 with 502 glue. The inner diameter of the metal bellows 1 is 10 mm , the outer diameter is 15 mm, the wave pitch is 3 mm, the wave thickness is 0.1 mm, the wave number is 5, the mass of the mass block 3 is 7.5 g, and the distance between the upper surface of the end cover 4 and the lower surface of the mass block 3 is 1 mm. A vibration sensing fiber grating 2 is installed in the metal bellows 1, and the upper part of the optical fiber of the vibration sensing fiber grating 2 is led out from the central through hole of the housing 7 and fixed on the central hole of the outer surface of the housing 7 with 502 glue. The lower part of the optical fiber of the fiber grating 2 passes through the central through hole of the mass block 3 and is pasted and fixed on the central ...