高速高精度频率测量技术的研究

Research on High Speed and High Precision Frequency Measurement Technology

该文在研究传统频率测量的基础上,提出了一种同步频率测量方法,可使整个测量频段内保持精度不变。在此基础上设计了一套以STM32单片机为核心的频率测试仪,仪器利用STM32增强型单片机的高速、高分辨率能力,可实现频率的高速高精度测量;采用同步测频等一系列措施,有效提高了测量精度,缩短了测量时间。实验结果表明,研制的测试仪精度高、频带宽、误差率低。

This paper presents a synchronous frequency measurement method on the basis of studying the traditional frequency measurement.This method can measure frequencies with equal precision in the whole frequency range.A frequency measuring apparatus based on STM32 single-chip microcomputer is designed.The instrument measures frequencies in high speed and high precision using excellent performance of STM32 SCM.The synchronous frequency measurement is used to improve the measurement accuracy and to shorten the measuring time.The experimental result shows the test instrument has high precision,wide frequency band,low error rate.