基于STM32的谐振式油品检测系统设计

Design of Resonant Oil Product Inspection System Based on STM32

为了克服传统发动机润滑油检测设备存在实时性差、体积庞大且价格昂贵等缺点,系统设计了一种基于STM32的谐振式油品检测系统。该系统以STM32为控制核心,利用石英晶体的压电特性和阻抗特性,采用石英音叉油液传感器来采集待测润滑油的黏度和密度。通过阻抗转换器采集石英音叉传感器发生谐振时的阻抗值,利用大数据分析润滑油黏度和密度与采集到的阻抗的关系,最终计算得出润滑油的黏度和密度。实际测试结果表明,在0~0.016 Pa·s黏度范围内,系统测量误差小于7%;在820~950 kg/m^3密度范围内,系统的测量误差误差小于8%。

In order to overcome the shortcomings of traditional engine lubricating oil detection equipment,such as poor real-time performance,large volume and high price,a resonant oil detection system was designed.The system used STM32 as the control core.Using the piezoelectric and impedance characteristics of the quartz crystal,the quartz tuning fork oil sensor was used to collect the viscosity and density of the lubricating oil to be tested.The impedance value of the quartz tuning fork sensor during resonance was collected by the impedance converter,and the relationship between the viscosity and density of the lubricating oil and the acquired impedance was analyzed by using big data,and the viscosity and density of the lubricating oil were finally calculated.The actual test results show that the system measurement error is less than 7% in the 0~0.016 Pa·s viscosity range, the system measurement error is less than 8% in the density range of 820~950 kg/m^3.