Abstract
A manometric method for determining the moisture content of fibrous materials is considered. The scheme and principle of operation of the device. A formula is given for calculating the moisture content of a material. According to the obtained measurement model, the determination of the moisture content of materials is reduced to measuring the heating temperature, the initial and final values of the volumes of vessels and pressures in the vessels before and after their communication. It is emphasized that the two-chamber manometric method for determining the moisture content of materials is an indirect measurement. To determine the measurement result and its uncertainty, it is necessary to justify and choose one of the appropriate methods for determining the measurement results and assess their uncertainty – the linearization method or the reduction method. The main sources of uncertainty are identified. The pairwise correlation between the estimates of the input quantities and the verification of the condition for the insignificance of the remainder term in the expansion of the measurement model in the Taylor series are estimated. Formulas for determining the sensitivity coefficients of the total standard uncertainty to the standard uncertainties of input quantities are presented. Standard, summary and extended uncertainties are provided.
Highlights
One of the main parameters of fibrous materials, in particular raw cotton and cotton fiber, is their moisture content
Based on the results of our studies, we have identified the disadvantages of existing methods for determining the moisture content of fibrous materials
The elimination of these shortcomings by the development of a manometric method for determining the moisture content W of fibrous materials and estimation of the uncertainty of measurement results is the main goal of this work
Summary
One of the main parameters of fibrous materials, in particular raw cotton and cotton fiber, is their moisture content. Since the two-chamber manometric method for determining the moisture content W of fibrous materials, as follows from the measurement model (6), is indirect, to determine the measurement result and its accuracy characteristics, according to [10], it was necessary to justify and choose one of the corresponding methods for determining the measurement results and estimation of their uncertainty – a linearization method or a reduction method. For this purpose, we carried out multiple (n=5) measurements of input quantities, such as T, P1, P2, P3, V0' and V0 (Table 1). 0,650 r(P1,P2)=0,433; r(P1,P3)=-0,681; r(P2,P3)=0,303; r(V0,V0I)=0,682 t(P1,P2)=1,593; t(P1,P3)=2,941; t((P2,P3)=1,004; t(V0,V0I)=2,952
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
