论文部分内容阅读
在温度测量和控制仪表中,普遍采用热电偶将被测温度转换为电信号。各种热电偶的输出电势和被测温度之间的关系都是非线性的。在常规仪表中,设计了许多校正电路进行非线性校正,以便提高温度测量精度。在用微型计算机构成的智能仪表中,可以采用各种数字线性化技术来提高测量精度。使用较多的方法是分段折线法。热电偶的毫伏-温度转换关系可用图1的曲线I表示。在某一段范围内,可用一段直线
In the temperature measurement and control instruments, the commonly used thermocouple will be measured temperature is converted to electrical signals. The relationship between the output potential of the various thermocouples and the measured temperature is non-linear. In conventional meters, many correction circuits are designed for non-linear correction in order to improve the temperature measurement accuracy. In smart meters made of microcomputers, various digital linearization techniques can be used to improve the measurement accuracy. The use of more methods is the segmentation line method. The millivolt-temperature conversion of a thermocouple can be represented by the curve I of FIG. Within a certain range, a straight line can be used