基于单片机的发动机转速测量系统设计  

Engine Rotational Speed Measuring System Design Based on Single Chip Computer

作　　者：李华英[1] 果霖[1] 付宏财[1] 

机构地区：[1]云南农业大学工程技术学院,云南昆明650201

出　　处：《云南农业大学学报（自然科学版）》2015年第2期294-297,共4页Journal of Yunnan Agricultural University:Natural Science

摘　　要：汽车发动机转速是反映发动机运行状况的重要参数之一,它能够综合反映汽车发动机的工作状态和质量。本文采用频谱分析法间接测量汽车发动机的转动转速。系统采用C8051F340单片机作为控制中心并辅助以其他相关电路元件,系统的信号分析和处理运用傅里叶快速变换加以实现。试验证明,该系统测量精度高,工作性能稳定。相对于传统的DSP芯片,C8051F340单片机更具有功耗低、成本低等优点,可适用于声音频率、电压频率以及其他行业相关测评系统中。Automobile engine rotational speed is an important parameter of engine running states,which can comprehensively reflect engine＇s working status and quality. In this study, frequency spec-trum analysis method was adopted to measure the Automobile engine rotational speed. In this systemC8051F340 single chip computer was used as control center, and connected with other relevant circuitelements. The signal analysis and processing of this system was realized by Fourier Fast Transformmethod. Testing results show that the system has good and stable performance, and high accuracy.Compared with traditional DSP chip, C851F340 single-chip computer has advantages of low energyconsumption and low cost. It also can be used to measure sound frequency, voltage frequency and fre-quencies in other relevant industries.

关 键 词：转速测量 C8051F340单片机 频谱分析 FFT变换 

分 类 号：TH113.24[机械工程—机械设计及理论]