基于PCI-9846H的光电式双通道液体浊度测量系统

Photoelectric Dual Channel Liquid Turbidity Measurement System Based on PCI-9846H

系统以高性能数据采集卡PCI-9846H为核心,构建了光电式双通道液体浊度测量系统,实现对液体浊度的实时监控。通过有源晶振和分频电路对激光进行调制。采用集成电路构建信号调理电路对采集信号进行处理。采用VB实现上位机程序设计,对数据采集卡进行控制和数据读取,将透射率等参数实时显示在PC机上。完成了系统性能测试,测试结果表明系统工作稳定可靠,实测数据与理论模型一致性好,实测数据与指数模型的残差平方和可低至0.001 758。系统对于气象环境监测等领域有重要参考作用,应用前景广泛。

Based on high performance data acquisition card PCI-9846H,a kind of photoelectric dual channel liquid turbidity measurement system was designed.It can realize the real-time monitoring of liquid turbidity.Modulated laser is get through active crystals and frequency dividing circuit.Integrated circuits were adopted to construct a circuit for acquired signal processing.Upper computer program was finished on VB,to control DAQ card and receive data.Parameters such as transmission rate were displayed on PC.The performance test is finished,and the results show that the system is stable and reliable,and the measured data work good agreement with the theoretical model.The SSE between measured data and exponential model can be low to 0.001 758.The research is helpful to the applications of meteorology environmental monitoring.