The Two-Stage Suspension System of the Fiber Optic Vector Hydrophone for Isolating the Vibration from the Mooring Rope

• Published in: Sensors (Basel, Switzerland) Vol. 22; no. 23; p. 9261
• Main Authors: Zhang, Yichi, Meng, Zhou, Wang, Jianfei, Chen, Mo, Liang, Yan, Hu, Xiaoyang
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 28-11-2022; MDPI
• Subjects: acceleration response; acceleration transmissibility; Equipment and supplies; fiber optic vector hydrophone; Fiber optics; Hydrophones; Mooring; Sensors; Signal detection; Suspension systems; two-stage suspension system; Vibration; acceleration transmissibility; two-stage suspension system; acceleration response; fiber optic vector hydrophone
• ISSN: 1424-8220; 1424-8220
• DOI: 10.3390/s22239261

The two-stage suspension system (TSSS) is designed for the fiber optic vector hydrophone (FOVH) to isolate the vibration from the mooring rope. The acceleration transmissibility of the TSSS is studied theoretically and experimentally. The results show that the TSSS has a major advantage over the traditional one-stage suspension system (OSSS). Typically, the vibration isolation of the TSSS is demonstrated to be over 25 dB higher than that of the OSSS at 100 Hz. Meanwhile, it is demonstrated that the TSSS has little negative influence on the in-band acceleration response of the FOVH. The TSSS has the prospect of reducing the mechanical noise of the FOVH, which is conducive to suppressing the self-noise and enhancing the ability of weak signal detection.