论文部分内容阅读
为了测试和提取曳引式电梯曳引轮不同磨损程度时的声发射特征,在曳引机内部固定安装声发射传感器、前置放大器以及无线发射装置,根据电梯曳引机运行过程中的振动特征,研究和开发了基于压电振动俘能的无源声发射传感器,将曳引机运行过程中的振动能量转换为电能,为声发射传感器、前置放大器以及无线发射装置连续供电。结果表明,压电振动俘能器供电稳定,六组压电振动俘能器能够同时满足声发射传感器、前置放大器以及无线发射装置的供电,为实现曳引轮不同程度磨损时的声发射特征提取提供了一种重要的技术手段。
In order to test and extract the acoustic emission characteristics of the traction sheave with different degrees of wear, an AE sensor, a preamplifier and a wireless transmitting device are fixedly installed inside the traction machine. According to the vibration characteristics during the operation of the elevator traction machine , A passive acoustic emission sensor based on piezoelectric vibration capture is researched and developed. The vibration energy during the operation of the traction machine is converted into electrical energy, and the acoustic emission sensor, preamplifier and wireless transmitting device are continuously powered. The results show that the power supply of the piezoelectric vibration capturer is stable. The six sets of piezoelectric vibration capturer can supply the power of the acoustic emission sensor, preamplifier and wireless transmitter at the same time. In order to realize the acoustic emission characteristics of the traction wheel with different degrees of wear, Extraction provides an important technical means.