无线三轴振动测试系统的设计

目前我国对于发动机振动参数的故障检测技术仍采用传统的人工经验与技师测试的方法，在检测过程中存在一定的主观性问题。针对此现象设计了一种基于微机电系统(MEMS: Micro-Electro-Mechanical System)加速度传感器和蓝牙无线通信的无线三轴振动测试系统，并配备有上位机，可以用于发动机的故障检测与状态诊断。首先通过安装在发动机外侧的传感器得到振动曲线; 然后通过无线模块发送至相应的上位机中，继而进行相应振动参数的判断，确定发动机的运行状态。经过振动系统测试和实际现场实验表明，该无线三轴振动测试系统性能指标满足发动机振动检测要求，能应用于发动机在线故障的监测和故障诊断，同时，设计的无线三轴振动测试系统具有易安装、测量快速准确等特点。

Novel Scheme on Mobile Multicast Key Management under P2P Environment

At present，China's fault detection technology for engine vibration parameters still uses traditionalmanual experience and technician test methods． It also has certain subjectivity． A wireless three-axis vibrationtest system is designed based on MEMS(Micro-Electro-Mechanical System) accelerometer and Bluetooth wirelesscommunication，and equipped with a host computer，which can be used for engine fault detection and statusdiagnosis． First，the vibration curve is obtained by a sensor installed on the outside of the engine． Then it is sentto the corresponding upper computer through a wireless module，and the corresponding vibration parameters arejudged to determine the operating state of the engine． The vibration system test and actual field experiments showthat the designed vibration test system performance index meets the engine vibration detection requirements，andcan be applied to the monitoring and diagnosis of the engine online fault． The designed wireless three-axisvibration test system has the characteristics of easy installation，fast and accurate measurement，etc．