基于XC878的汽车发动机振动检测系统

XC878-based automotive engine vibration detection system

文章针对汽车发动机转速信号难以测量的问题,提出一种基于单片机XC878的振动信号检测与处理系统,即通过加速度传感器将发动机缸盖振动信号转换为电信号,滤波和放大后经过A/D转换器送入单片机,用离散傅氏变换的快速算法(fast Fourier transform,FFT)对信号进行频域分析和处理后得到汽车转速,以避免测量转速时装卸困难和机器损坏,提高了设备的可靠性,降低了设备维修成本。

In this paper,a XC878 microcontroller-based vibration signal detection and processing system is proposed, for the car engine speed signal is difficult to measure. The vibration signals of the cylinder head of the engine are transformed into the electrical signals through the acceleration sensor, and then put into the microcontroller through A/D converter after filtering and amplification. The frequency- domain analysis and processing of the signals are carried out by using fast Fourier transform（FFT） al- gorithm and the car engine speed is gotten, thus avoiding machine damage and handling difficulties when measuring speed, improving the reliability of the equipment and reducing the maintenance costs.