机械传动系统的智能感知技术

本文综述了传动系统关键零部件智能感知技术的发展状况，包括振动和润滑接触状态监测，以及封闭金属箱体内外的超声通信技术.振动监测主要通过嵌入系统内部的微加速度传感器及无线通信技术来实现；润滑接触状态包括压力、温度分布及油膜厚度，其中压力和温度分布测量主要利用接触式的金属薄膜电阻传感器，油膜厚度监测可以通过接触式电容方法或者非接触式超声方法.由于封闭金属箱体会屏蔽电磁信号，迫切需要实现基于机械波的箱体内外双向通信.同时，本文简要介绍了课题组开发的齿轮振动和应变无线监测系统，实验结果表明内部感知信号能够清晰地体现转速和啮合信息，从而反映传动系统的实时运行状态.

Intelligent Sensing Technology for Mechanical Transmission System

In this paper, the development of intelligent sensing technology for key parts of transmission system was reviewed, including vibration and lubrication condition monitoring, and ultrasonic communication technology across the closed metal box. The results show that, vibration monitoring is mainly realized by embedded micro-acceleration sensor and wireless communication technology; Lubrication contact states include pressure, temperature distribution and oil film thickness. The measurement of contact pressure and temperature distribution can be achieved by the metal film resistor sensor, and the oil film thickness monitoring can be achieved by contact capacitance method or non-contact ultrasonic method. Since the closed metal box can shield the electromagnetic signal, it is urgent to realize the bidirectional communication across the box based on mechanical wave. Meanwhile, the research and development of gear vibration and strain wireless monitoring system was briefly introduced. The experimental results show that the recorded internal signal can clearly reflect the speed and contact information, so as to reflect the real-time running state of the transmission system.