船舶动力设备振动三维加速度传感器设计

Design of 3D Acceleration Sensor for Detecting Vibration of Marine Power Equipment

三维加速度传感器能够监测船舶动力设备三维振动状况,为动力设备运行提供参考数据和故障诊断依据,是一种重要的检测元件.以弹性体应变作为检测对象,设计一个由弹性体、质量块、壳体和盖板组成的三维加速度传感器.讨论了传感器弹性体面临冲突的改善方案,即利用减薄铰的方法使弹性体对重力加速度引起的载荷更敏感.对传感器的强度、屈曲、模态进行分析,发现传感器工作状态可靠.最后,给出了三维传感器应变片贴片方式,并给出振动信号处理算法.

Three-dimensional acceleration sensor can monitor the three-dimensional vibration status of marine power devices,and provide references for the power equipment operation and basis data for fault diagnosis,so it is an important detection device.In this paper,taking the elastic strain as a measure obj ect,a new three-dimensional acceleration sensor is designed,which is made of elastomer,mass,the shell and cover.Through dynamics analysis of the sensor,two-direction sliding connection structure is used to avoid the contradiction existed in the elastomer.The strength,bulking and modal analysis of sensor are analyzed,and the results indict that the acceleration sensor is reliable.Finally,the placement method of strain gauge is given,and the vibration signal processing algorithms is discussed.