基于MEMS固态传感器的海洋平台多点空间振型的快速同步采集

Express Synchronous Acquisition with MEMS-Based Multi-point Vibration of Offshore Platform

海洋平台结构安全整体振动检测技术由于其设备要求低、可操作性强等优点,在海洋工程领域得到广泛应用,代表了未来大型工程结构非侵入式无损检测与诊断的技术趋势。提出了海洋平台多点空间振型同步采集方案,将智能传感器和无线传感器网络的理念引入到海洋平台结构安全振动检测应用中来,以基于MEMS固态传感器的数字化智能振动检测单元代替传统的模拟拾振器,以分布式无线自组织传感器网络替代了测点与主机之间的连接电缆,在对海洋平台空间整体复杂振型实现精确同步遥测的同时,提高了系统冗余度和可靠性,简化了现场操作施工程序,极大增强了整套系统的环境耐受能力。以此技术为基础研发的海洋平台多点超低频振动快速巡检与诊断系统的成功应用也预示了无线传感器网络技术在海洋平台安全检测与监测领域的广阔应用前景。

Vibration based offshore platform structural safety evaluation technology has been widely used in offshore engineering be- cause of its advantages such as low price and convenient operation, etc., which represents the technological tendency of non-invasive and nondestructive detection and diagnosis on large scale engineering structure. By introducing intelligent sensing and wireless data communication network technologies, the wireless sensor network （WSN） based multi-point synchronous acquisition scheme is pro- posed. This new application-specified vibration sensing and acquisition system can effectively measure and record spatial vibrations of offshore jacket platforms without wiring troubles or environmental interferences introduced by cabling. Moreover, it improves significantly the redundancy and reliability of the system, enhances its environmental survivability, simplifies the field operational procedure, and reduces greatly the operation cost. The successful development and application of the rapid detection and diagnostic system for ultra-low frequency vibration of offshore platforms have broad application prospects for wireless sensor network technol- ogy in application to safety monitoring and detection of offshore platforms.