一种新型的声表面波液相检测系统的研究

Study of a novel surface acoustic wave liquid detection system

为实现工业生产中某些溶液特性参数的全自动实时监测,设计了一种新型的基于虚拟仪器测试平台的双通道水平剪切声表面波(SH SAW)液相传感检测系统,将流动注射分析方法应用于该系统,可分别检测溶液的总盐度和白酒的酒精度,以及食用油、汽油等有机溶液中水的质量分数.实验表明,对总盐度的检测下限低于1.2×10-4S/m;对白酒酒精度检测的测量误差小于±0.2°;可以有效地识别有机溶液的水质量分数.该传感检测系统具有使用方便、检测速度快、抗干扰强、重复性好等优点,这种微机化后的新型分析仪器适合于工业生产现场的实时监控使用.

A novel dual channel Shear-Horizontal Surface Acoustic Wave (SH-SAW) liquid detection system based on the virtual instrument platform was developed in this work. By the application of flow injection analysis (FIA) technology to this system, it can automatically detect various physical parameters of liquid for real time monitoring. The experimental results showed that it can effectively detect solution (salinity) (determination limit <1.2×10~^(-4)()S/m), alcohol concentration (error<(±0.2°), )and water ratio in (organic) solution. This system has many merits such as good stability, reproducibility, anti-interference, short detection time, etc. It is suitable for real time monitoring in industrial process when microcomputerized into a miniative analysis instrument.