Parameter Sensitivity of Temperature Response Characteristics in the Thermistor Pasting Technology

In this paper, the effects of uncertain factors in the thermistor pasting technology are researched using parameter sensitivity analysis method. The relevance between thickness of electrical insulating tape, contact interface area, thermal contact conductance and thermal time constant is analyzed, and sensitivity classification of uncertain factors is done by the absolute/relative variation of thermal time constant. Research shows that 1) thickness of electrical insulating tape d(PI) and thermal contact conductance h(t) are the insensitive parameters about thermal time constant in the surface pasting technology, relative sensitivity indexes are 0.169[s(0.5)/mu m(0.5)] and 0.292[m.s(0.5)center dot K-0.5/W-0.5] respectively; 2) contact interface area A(t) is the sensitive parameter about thermal time constant in the surface pasting technology, absolute variation and relative sensitivity index is 124.6s and 3.530[s(0.5)/mm] separately; 3) in addition to the high-precision calibration, filtering the sensitive-bead size and contact interface area strictly are also crit ical for improving the real-time measurement accuracy and temperature-changing response speed of thermistors.