谐振式液位传感器在喷雾机药液箱液位检测中的应用

分析了洗衣机用谐振式液位传感器的工作原理及其相对于其他液位检测设备的优势,针对将其用于车载大型喷雾机药液箱时在测量范围上的不足,通过结构改进使测量范围由原来的600 mm增加到1 200 mm;在选用AVR系列单片机ATmega8作为测量用处理器的基础上,开发了测量电路和相应的程序;通过安装设计,有效地避免了液位大幅度抖动而损坏传感器的风险。结果表明,传感器系统量程符合要求,液位高度与传感器输出信号频率的决定系数R2为0.989。

Application of resonance water level sensors in sprayer tank liquid level measurement

The working theory and advantages of resonance water level sensor for washing machine over other water level measuring instruments were analyzed in this paper.When used in vehicular mass sprayer pesticide container water level measurement,its scale was limited.Some improvement in its inside structure had been taken out so that the measuring scale increased from 600 mm to over 1 200 mm.Based on the AVR microchip controller ATmega8,the measuring circuit was figured out as well as some corresponding program.By installation design,the risk that severe water shaking may cause damages to the sensor was efficiently avoided.Results showed that,scale of the sensor fulfilled requirements and the R square(R2) between liquid level and sensor output frequency was 0.989.