研究目的
To develop an in-line and real-time chromatic sensor for liquids based on plastic optical fiber, studying and characterizing its dependency on turbidity and refractive index for future implementation of auto-compensation routines.
研究成果
The developed chromatic sensor can differentiate color and turbidity in liquids with an accuracy of about ±0.3 AU. It shows linear variations of light with the increase of refractive index, suggesting the need for an independent refractive index-sensing mechanism for compensation.
研究不足
The sensor requires external measurement of refractive index for compensation, and accuracy is about ±0.3 AU in turbid liquids.
1：Experimental Design and Method Selection:
The sensor is based on the air-gap, multimode fiber-to-fiber, transmission principle. It uses LEDs of different wavelengths for color measurement and an infrared LED for turbidity measurement.
2：Sample Selection and Data Sources:
Solutions with varying turbidity and color concentrations were prepared using red dye and corn starch.
3：List of Experimental Equipment and Materials:
LEDs (430 nm, 522 nm, 660 nm, 870 nm), POF coupler, photodetectors, stainless-steel sensing head, and ESKA? series model GHCP4001 POF.
4：Experimental Procedures and Operational Workflow:
The sensor sequentially turns on and off each light source, registers data from photodetectors, and sends it to an online server for calculation.
5：Data Analysis Methods:
The Beer-Lambert law is used to calculate attenuation, and a methodology is developed to discriminate color from turbidity using infrared measurements.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
