基于MSP430单片机的高精度测频模块设计  

High Precision Frequency Measuring Module Based on MSP430

作　　者：贺虎[1] 王万顺[1] 田冬成[1] 孙建会[1] 熊成林[1] 

机构地区：[1]中国水利水电科学研究院工程安全监测中心,北京100038

出　　处：《数据采集与处理》2009年第B10期241-244,共4页Journal of Data Acquisition and Processing

摘　　要：提出了基于该单片机的测频原理和方法,并用C语言编程实现,详细阐释了相关硬件寄存器的设置技巧。融合计时与计频两种方法,使该程序能在高频段和低频段均有较高的测量精度。通过数据比测,验证了该方法的正确性。该测频模块具有成本低、精度高、可靠性好及便于集成等优点。The capture module on MSP430 MCU＇s internal 16 bit timer, with its counting and timing function is used. The frequency is accurately measured without exterior components. This paper introduces the frequency measurement principle and the corresponding C language procedure. The combination of two methods for measuring cycle and frequency enables that the procedure has a high measuring accuracy in the high frequency band and the low frequency band. Through the actual survey comparison, the method is confirmed to be accurate.

关 键 词：频率测量 高精度 捕获 MSP430 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]