Abstract：This device uses STM32F407 as the core to achieve waveform recognition and parameter measurement of
periodic signals. The device consists of a core calculation module, buttons, display, signal conditioning circuit, and zero
crossing detection circuit. It can achieve multi-channel gain sampling of periodic signals, measure parameters such as
peak to peak value and frequency of waveforms, and identify waveform types such as sine waves, square waves, and
triangular waves. This system achieves precise measurement of a wide range of voltage through a multi gain signal
conditioning circuit, precise measurement of frequency through a hardware zero crossing circuit, real-time waveform
acquisition through frequency calculation of sampling frequency, and recognition of waveform types through model
matching. It has the advantages of wide voltage and frequency measurement range, high measurement accuracy, accurate
waveform recognition, and fast response speed.
2024, Vol. 1 
