Practical temperature measurement method with platinum thermal resistance
Jiao Wan-jun · China Measurement & Testing Technology · 2008
According to the measurement accuracies effects caused by non-linear errors of temperature measurement with platinum thermal resistance sensor and bridge-circuit of common voltage stabilizer,precise temperature measurements were realized through eliminating the non-linear errors.Wherein,characteristics of operational amplifier working in the linear area were used,the principle of constant current resource was applied to bridge circuits and Mega16 with integrating A/D conversion technology was used to calculate.The experimental results indicate that it shortens the account time,reduces the shift influence,and reduces the errors to some extent.