基于振动信号和小波变换的转速测量方法研究  

Research on the Speed Measurement Based on the Vibration Signal and Wavelet Trousform

作　　者：蒋强[1] 孙利生[1] 

机构地区：[1]东南大学,南京210096

出　　处：《汽车科技》2011年第1期39-41,共3页Auto Sci-Tech

摘　　要：通过分析发动机振动信号的基频与转速之间的数学关系,设计了基于LabVIEW的采集系统,利用小波变换的方法提取振动信号的基频,提出了一种精度高、易于实现的发动机瞬时转速检测算法,并通过试验验证了该方法的可行性。经过与实际转速比较,该算法的误差率在1%以内,准确性和鲁棒性均符合测量要求,具有重要的实用价值。This paper analysis the mathematical relationship between fundamental frequency of vibration signal and rotate speed. The data acquisition system based on LabVIEW is designed. Then wavelet transform method is used to extract the fundamental frequency of vibration sigana], an engine instantaneous speed detection algorithm with high precision is pro- posed and is easy to implement. This proposed method is testified by experiments. Comparing with the actual speed, the error rate of this algorithm is under 1%, the aeeuraey and the robustness can meet the measurement＇s requirement, it has important applieationvalue.

关 键 词：发动机转速 振动信号 基频 小波变换 

分 类 号：U467.4[机械工程—车辆工程]