title: Generalized weighted ratio method for accurate turbidity measurement over a wide range.
abstract: Turbidity measurement is important for water quality assessment, food safety, medicine, ocean monitoring, etc. In this paper, a method that accurately estimates the turbidity over a wide range is proposed, where the turbidity of the sample is represented as a weighted ratio of the scattered light intensities at a series of angles. An improvement in the accuracy is achieved by expanding the structure of the ratio function, thus adding more flexibility to the turbidity-intensity fitting. Experiments have been carried out with an 850 nm laser and a power meter fixed on a turntable to measure the light intensity at different angles. The results show that the relative estimation error of the proposed method is 0.58% on average for a four-angle intensity combination for all test samples with a turbidity ranging from 160 NTU to 4000 NTU.
authors.forename: Hongbo
authors.initials: H
authors.lastname: Liu
authors.forename: Ping
authors.initials: P
authors.lastname: Yang
authors.forename: Hong
authors.initials: H
authors.lastname: Song
authors.forename: Yilu
authors.initials: Y
authors.lastname: Guo
authors.forename: Shuyue
authors.initials: S
authors.lastname: Zhan
authors.forename: Hui
authors.initials: H
authors.lastname: Huang
authors.forename: Hangzhou
authors.initials: H
authors.lastname: Wang
authors.forename: Bangyi
authors.initials: B
authors.lastname: Tao
authors.forename: Quanquan
authors.initials: Q
authors.lastname: Mu
authors.forename: Jing
authors.initials: J
authors.lastname: Xu
authors.forename: Dejun
authors.initials: D
authors.lastname: Li
authors.forename: Ying
authors.initials: Y
authors.lastname: Chen