混药浓度在线检测装置的设计与实验研究

Design and experimental research of the online detection device for mixed drug concentration

根据不同浓度溶液透光率不同,设计了一种混药浓度在线检测的装置。采用发光二极管配合灯罩的光源,线性CCD传感器作为光强接收装置,制作了透明长方体检测流道以及相关配套电路。在流量为3.2L/min、4.0L/min、4.8L/min时得到透射光灰度值与浓度拟合曲线,并进行了在线检测混药浓度装置性能的实验,用测量浓度和用烘干法所得浓度进行对比,偏差均小于等于0.045 6g/L,相对误差均小于等于9.575%,能够实现混药浓度在线检测。

According to the different transmittances of different concentrations,an on-line concentration detection device was designed.Using the laser emitting light with shade,linear CCD sensor as the light receiving device,the transparent flow channel and supporting circuitry were designed.The fitted curve of transmitted light gray values and concentration was got when the flow rate was 3.2L/min,4.0L/min,4.8L/min,and the performance experiment of on-line detection device of mixed drug concentration was carried out.The measured concentration was compared with that obtained in drying method,the deviations were less than or equal to 0.045 6g/L,the relative error was less than or equal to 9.575%,indicating that the device can be used for the online test of mixed drug concentrations.