基于小波变换的爆缸检测方法

Engine Knock Detection Method Based on Wavelet Transform

阐述了一种基于小波变换的发动机爆震信号检测的新方法。当空气燃油混合气的一部分在汽缸里自由燃烧时,爆震传感器采集到爆震信号,利用小波变换来对爆震信号进行去噪和奇异点的分析处理,并通过对测试信号的处理和分析验证了这一方法的有效性,实验表明,该方法能够准确地检测出爆震发生的时间。

In this paper, we propose a new method for engine knock detection based on wavelet transform. When air and fuel admixture burns in cylinder, knock sensor collects the knock signal, the paper uses the wavelet transform to analyze and deal with the signal （e. g. denosing and finding the landmarks） . Via the simulation and test system, get a good effect. The results show that this method can achieve the accurate knock detection.