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我们知道,金属的电阻是随着温度而变化的。利用这一特性制成的热电阻的阻值与温度两者之间的关系为:R t=R。(1+At+Bt~2+Ct~3+……)式中R_1为t℃时的热电阻的阻值;R_o为0℃时的热电阻的阻值;A、B与C是有关的分度常数。当被测介质的温度变化时,热电阻的阻值即按上式变化。在通常情况下,可用测温电桥来完成温度的检测与电量转换任务,并通过指针式仪表或电子电位差计指示出被测温度的大小。对于数据采集与处理系
We know that the resistance of a metal varies with temperature. The use of this feature made of the resistance of the thermal resistance and temperature between the two as: R t = R. (1 + At + Bt ~ 2 + Ct ~ 3 + ...) Where R_1 is the resistance of the thermal resistance at t ° C; R_o is the resistance of the thermal resistance at 0 ° C; A, B and C are related Indexing constant. When the temperature of the measured medium changes, the resistance of the thermal resistance changes according to the above formula. Under normal circumstances, temperature measurement bridge can be used to complete the temperature detection and power conversion tasks, and through the pointer instrument or electronic potentiometer indicates the size of the measured temperature. For data acquisition and processing department