摘要
提出了两种测量内燃机转速波动信号的简易方法 ,探讨了提高测量精度的途径 ,介绍了用于内燃机故障诊断的一些测量和应用实例 ,给出了相应的特征提取和故障识别方法。
Two techniques have been developed to measure the speed fluctuation signals from an internal combustion engine for its fault diagnosis.One is first to measure the displacement of the flywheel gear teeth relative to its case, where an eddy current sensor is placed,and then to convert the signals into square waves by a band pass filter and a maveshaping amplifier.The speeds required are obtained by measuring the periods of the waves with a high frequency counter.The other is directly to convert the displacement signals into digital ones by an A/D converter.The periods of the samled signals are computed by the software.
出处
《振动．测试与诊断》
EI
CSCD
2000年第1期13-18,共6页
Journal of Vibration,Measurement & Diagnosis
关键词
内燃机
故障诊断
转速波动信号
测量
软件计数
internal combustion engines fault diagnosis speed fluctuation measurement
