▎ 摘　　要

NOVELTY - Optical fiber sensing device includes an amplified spontaneous emission (ASE) light source (1), an optical fiber coupler (2), a sensing unit (3), an ultrasonic conversion device (4), a photoelectric converter (5), and a signal processing module (6). The silicon ring is made by cutting a single crystal silicon wafer with a ultraviolet (UV) cutting machine. The quartz diaphragm is made of ammonium fluorosilicate ((NH4)2SiF6) purified liquid placed in a water bath, stirred and heated to a certain temperature, added with fluorosilicate ammonia solution and 26 wt.% ammonia. The graphene is prepared by liquid phase exfoliation method. The natural graphite, sulfuric acid, and potassium dichromate are uniformly mixed, and fully reacted in a 100 degrees C water bath, and then the reaction solution is washed with ionized water, filtered, dried at 50 degrees C, and dried. The powder undergoes expansion treatment at 1200 degrees C for 10 seconds, and then puts it in the N-methylpyrichromone solvent. USE - Optical fiber sensing device. ADVANTAGE - The device is simple in structure and reasonable in design, and has high working efficiency, and increases frequency band of ultrasonic wave and realizes real-time voltage monitoring process. DESCRIPTION OF DRAWING(S) - The drawing shows the schematic view of structural diagram of an optical fiber sensing device. ASE light source (1) Optical fiber coupler (2) Sensing unit (3) Ultrasonic conversion device (4) Photoelectric converter (5) Signal processing module (6)