一种周期信号波形识别及参数测量装置的设计  

Design of a periodic signal waveform recognition and parameter measurement device

作　　者：殷理杰 张文初[1] 魏丽君[1] YIN Lijie;ZHANG Wenchu;WEI Lijun(Hunan Railway Professional Technology College,Hunan Zhuzhou 412001,China)

机构地区：[1]湖南铁道职业技术学院,湖南株洲412001

出　　处：《工业仪表与自动化装置》2022年第4期28-32,共5页Industrial Instrumentation & Automation

基　　金：湖南省教育厅科学研究项目:标签供料器收料电机的模型预测控制算法研究与实现(21C1308)。

摘　　要：信号的采集和精密测量是微弱信号处理的重要环节,决定着仪器的精度和准确度。该文拟采用STM32为硬件平台,设计完成模拟信号采集电路、4档位2级放大电路,通过多周期信号采样策略以及kNN算法,实现了对周期信号进行波形识别及参数测量。最后通过实验测试,该装置可以实现对测量范围50 mVpp~10 Vpp,频率1 Hz~50 kHz周期信号的类型、峰峰值、频率以及矩形波的占空比进行精密测量,误差小于1%。Signal acquisition and precision measurement is an important part of weak signal processing,which determines the accuracy and accuracy of the instrument.In this paper,STM32 is used as the hardware platform to design and complete the analog signal acquisition circuit and 4-gear 2-stage amplification circuit.Through the multi cycle signal sampling strategy and KNN algorithm,the waveform identification and parameter measurement of the periodic signal are realized.Finally,through the experimental test,the device can accurately measure the type,peak to peak value,frequency and rectangular wave duty cycle of 50 mVpp~10 Vpp,1 Hz~50 kHz periodic signal,and the error is less than 1%.

关 键 词：STM32 多周期采样 KNN算法 频率 占空比 

分 类 号：TP334.3[自动化与计算机技术—计算机系统结构]