基于ARM微控制器的无线测振仪设计

Design of a Wireless Vibration Meter Based on ARM Microcontroller

摘要: 振动信号高精度采集与分析是工业设备状态监测及故障诊断的核心支撑技术。针对传统有线测振仪器布线繁杂、现场部署灵活性不足的短板，研究研制了一套基于ARM微控制器的无线测振系统。该系统采用STM32F407VET6作为下位机主控，利用ADXL357高精度三轴MEMS数字加速度传感器采集振动信息，通过nRF24L01 + 无线数传模块将原始振动数据实时上传至上位机。标准振源测试结果显示，系统可精准复现正弦激励时域波形；经PC端FFT频域分析后，频谱主峰与振源设定频率匹配度良好，验证了软硬件整体设计方案的有效性与可行性。

Abstract: In the field of modern industrial equipment condition monitoring and fault diagnosis, the precise acquisition and analysis of vibration signals are essential for evaluating equipment health. To address the issues of cumbersome wiring and poor flexibility inherent in traditional wired vibration measurement equipment, this paper designs and implements a wireless vibration measurement system based on an ARM microcontroller. The system utilizes the STM32F407VET6 as the core microcontroller unit (MCU) for the data acquisition node. It employs a high-precision 3-axis digital MEMS accelerometer, ADXL357, for vibration signal collection, and wirelessly streams the raw data to a host PC via an nRF24L01+-based transmission module. Experimental results demonstrate that the system can accurately reproduce the time-domain sinusoidal waveforms generated by a standard vibration source. Furthermore, Fast Fourier Transform (FFT) analysis conducted on the PC side reveals that the main peak frequency in the frequency domain perfectly matches the set frequency of the standard source, thereby verifying the correctness and feasibility of the hardware and software design.