研究目的
Designing an inexpensive turbidity sensor that incorporates a pair of multimode fibers (MMF) for examining the level of turbidity in water.
研究成果
The proposed plastic fiber sensor is capable of producing reliable turbidity measurements in a dynamic range of 0 to 1000 NTU, making it suitable for practical field measurements. The sensor's design is simple and economical, offering a viable solution for water quality monitoring.
研究不足
The sensor's performance is influenced by the suspended particles' properties in different aquatic ecosystems, leading to variations in efficiency due to organic and inorganic compounds.
1：Experimental Design and Method Selection:
The study focuses on designing a turbidity sensor using a pair of MMFs with beveled tips mounted vertically. The efficiency of different beveled angles is evaluated by simulation with Tracepro software.
2：Sample Selection and Data Sources:
The sensor is tested with sucrose and formazin solutions of various concentrations and real water samples collected from lake, river, and coastal areas.
3：List of Experimental Equipment and Materials:
NIR laser diode light source (808 nm), QE65000 spectrometer, MMFs, plastic cuvette (1 cm length), cuvette holder, Newport fiber optic mounts.
4：Experimental Procedures and Operational Workflow:
The sensor head is immersed into water mixtures, and the reflected signal is collected and analyzed for various concentrations. The turbidity sensor is tested with real samples to demonstrate its consistency with commercial apparatus.
5：Data Analysis Methods:
The output intensity is analyzed for various concentrations, and the results are compared with those obtained from a commercial turbidimeter.
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