激光技术2025，Vol.49Issue(1)：21-27,7.DOI:10.7510/jgjs.issn.1001-3806.2025.01.004
基于采样平均法相差检测的溶解氧测量方法
Dissolved oxygen measurement method based on sampling-average method for phase difference detection
摘要
Abstract
In order to achieve rapid and high-precision measurement of dissolved oxygen mass concentration using optical methods,a dissolved oxygen measurement method based on sampling-average to detect phase difference has been proposed.The multi-sampling average method was used to eliminate single-point error and improve measurement accuracy.Theoretical analysis and experimental validation were conducted.The measurement accuracy,measurement speed,and the influence of sampling frequency on the measurement error were studied.Comparative assessments were made against the performance of various existing methods,and a dissolved oxygen measurement system was set up to validate measurement results.The results indicate a clear advantage ofusing the sampling-average method to detect phase difference,with high measurement accuracy(measurement error is 1.13°,measurement standard deviation is 1.24°)and fast measurement speed.The relative measurement error of the dissolved oxygen measurement system is 2.84%,and the relative measurement standard deviation is 4.51%,achieving high-precision measurement of dissolved oxygen mass concentration.This research provides a simpler and more accurate phase difference detection method for high-precision dissolved oxygen measurement using optical methods.关键词
信号处理/相位差测量/采样平均法/溶解氧/荧光猝灭效应/仿真分析Key words
signal processing/measurement of phase difference/sampling-average method/dissolved oxygen/fluorescence quenching/simulated analysis分类
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李天林,刘天元,黄梅珍..基于采样平均法相差检测的溶解氧测量方法[J].激光技术,2025,49(1):21-27,7.基金项目
上海交通大学深蓝计划重点资助项目(SL2021ZD103) （SL2021ZD103）
