کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7113985 | 1461079 | 2018 | 22 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Venturi tube calibration for airflow and volume measurement
ترجمه فارسی عنوان
کالیبراسیون لوله ونتوری برای جریان هوا و اندازه گیری حجم
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کلمات کلیدی
کلریمتری غیر مستقیم، اسپیرومتری، تهویه متر ونتوری، جریان هوا، توربین، پنوماتاکمتر، کالیبراسیون،
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
کنترل و سیستم های مهندسی
چکیده انگلیسی
Ventilation measurement by Venturi meters (Vm) has not been validated for human ventilation application in basic and applied physiology. This project aimed to demonstrate the feasibility of the Vm as an inexpensive, robust method for inspiratory ventilation measurements used in Indirect Calorimetry. A differential pressure transducer sensitive from 0 to 1000â¯Pa combined with Vm made from retail PVC tubing (50â¯mm Inside Diameter (ID) at inlet, 17.5â¯mm ID throat section) allowed for airflow measurement of 1-8â¯Lâ¯sâ1. A Turbine (Ti) was used as the criterion method. Variable airflow of atmospheric, temperature, pressure saturated (ATPS) conditions, were produced through manual 3â¯LATPS manoeuvres of a calibration syringe and constant airflow was induced using a commercial air compressor. The Vm produced valid volumetric airflow (VÌ) estimates across non-steady state pulsatile flow conditions (â¯Â±â¯0.22â¯Lâ¯sâ1 95% confidence limits with zero bias for Bland-Altman). The Vm also made valid VÌ measurements for steady-state continuous flow (â¯Â±â¯0.065â¯Lâ¯sâ1 95% confidence limits with zero bias for Bland-Altman). Column statistics revealed Vm mean estimates of 3â¯L calibrated syringe manoeuvres at different flow rates (0.1-8â¯Lâ¯sâ1) to be 2.972â¯Â±â¯0.020 vs. 3.066â¯Â±â¯0.022â¯L for Ti, respectively, with less than half the percentage error (0.9 vs. 2.2%, respectively). The results indicate that air flow measured by a Vm has similar accuracy to a criterion device for simulated human inspiratory airflow conditions. Further instrumentation and validation studies will lead to potential use of the Vm for measurements in human ventilation, such as airflow (L·sâ1), tidal volume (VT) and minute ventilation (L·minâ1).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Flow Measurement and Instrumentation - Volume 60, April 2018, Pages 200-207
Journal: Flow Measurement and Instrumentation - Volume 60, April 2018, Pages 200-207
نویسندگان
Praneel John Titheradge, Robert Robergs,