کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5001829 1461082 2017 22 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Estimating random uncertainty of depth-averaged velocities measured by moving-boat acoustic Doppler current profilers
ترجمه فارسی عنوان
برآورد عدم قطعیت تصادفی سرعت متوسط ​​محاسبه شده با استفاده از پروفیل های جریان داپلر آکوستیک حرکتی قایق
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی کنترل و سیستم های مهندسی
چکیده انگلیسی
This paper presents a mathematical model for estimating the standard uncertainty of depth-averaged velocities measured by moving-boat acoustic Doppler current profilers. A general form of the presented uncertainty model was developed based on the law of propagation of variances and dimensional analysis. It was then calibrated using 30 datasets of stationary ADCP measurements, in which standard uncertainties were available from statistical analysis of the data. Because the model utilizes velocity data collected at a site, it accounts for all random error sources including ADCP system noise and ambient turbulence encountered at the site; it also accounts for the cross-correlation of ADCP depth cells in velocity measurements. The presented uncertainty model can be used in field surveys or data post-processing. It provides a useful tool for assessing the quality of ADCP measured depth-averaged velocities. A moving-boat ADCP measurement on the Mississippi River is presented as an application example. This paper also explores some insights on ADCP velocity profile and time series data.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Flow Measurement and Instrumentation - Volume 57, October 2017, Pages 78-86
نویسندگان
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