Open AccessTemperature Measurement of Coal Pipe of Coal Mills by a Modified Bridge Circuit
Author(s) -
Karunamoy Chatterjee,
Tapan K. Maity,
Sankha Chattopadhyay
Publication year - 2019
Publication title -
international journal of engineering and advanced technology
Language(s) - English
Resource type - Journals
ISSN - 2249-8958
DOI - 10.35940/ijeat.a1161.129219
Subject(s) - wheatstone bridge , bridge circuit , linearity , coal , resistance thermometer , capacitance , resistive touchscreen , temperature measurement , amplifier , detector , repeatability , engineering , electrical engineering , acoustics , materials science , resistor , waste management , physics , thermodynamics , chemistry , electrode , chromatography , cmos , quantum mechanics , voltage
In our earlier work we proposed a method to measure the temperature of the coal pipe of Coal Mills in PF Boiler by a continuous basis, In order to achieve, accurate measurements of coal pipe temperature, using the resistive transducers like resistance temperature detector (RTD), the small resistance changes linearly with temperature, but resistance measurement by using RTD using normal Wheatstone bridge circuit would have errors for the stray capacitance presents in between bridge nodal points and the ground. Hence, by the use of a modified operational amplifier based Wheatstone bridge network, these effects can be minimized. The bridge performance has been studied experimentally with RTD. It has been observed good linearity, repeatability and variable sensitivity over the wide range of temperature.