ДИСТАНЦИОННОЕ ИЗМЕРЕНИЕ СВЕРХМАЛЫХ РАЗНОСТЕЙ ТЕМПЕРАТУРЫ ПОСРЕДСТВОМ ДИФФЕРЕНЦИАЛЬНЫХ РЕЗИСТОРНЫХ ТЕРМОДАТЧИКОВ

• Дата: 2014
• Автори: Мельник , В.Г., Новик , А.И., Рубанчук , М.П., Василенко , А.Д.
• Формат: Стаття
• Мова: Ukrainian
• Опубліковано: Інститут електродинаміки НАН України, Київ 2014
• Теми: мостовая измерительная цепь; дифференциальный датчик; терморезистор; погрешность; импеданс
• Онлайн доступ: https://techned.org.ua/index.php/techned/article/view/1026
• Назва журналу: Technical Electrodynamics

An actual task is fixing and quantitative estimation of small difference of temperatures in the nearby areas of space in some branches of science and technique. A purpose of this work is consideration of circuit solutions directed on minimization of influence of noise (fields), parasite impedances, and also analysis of basic errors, accompanying the similar measuring. A bridge measuring circuit, working on an alternating current with the use of differential sensors on the basis of miniature thinfilm resistance thermotransducers, providing the best noise stability for the measuring of weak thermal streams, is offered. Analysis of the obtained expressions shows that in the investigated scheme resistance of cable wires are not entered additive errors in the measurement. A relatively small multiplicative error (about 0,1 %), arising from the impact of these and other resistance on the currents in the bridge branches, is constant and can be considerably reduced well-known methods of errors correction. References 7, figures 2.