连续式非线性A/D变换器的原理及其应用  

The Principle and Application of Smooth Nonlinear A/D Converter

作　　者：邵军哲[1] 陈育斌[1] 陈泽生 

机构地区：[1]大连工学院

出　　处：《仪器仪表学报》1985年第3期276-285,共10页Chinese Journal of Scientific Instrument

摘　　要：各种传感器,绝大多数的输出与输入呈非线性关系,因此,在应用中进行线性化处理至关重要。本文提出一种电路简单而效果却相当满意的称之为连续式非线性A/D变换器,它可以用于某些传感器进行线性化处理。它用于铂电阻数字测温,在-200℃到+650℃的整个温度范围内,绝对误差小于0.5℃,这是一般线性化电路很难达到的(或者能达到而电路过于复杂)。本文最后提出把连续式和折线式非线性A/D变换器结合起来,以进一步提高线性化精度,扩大应用范围。There are various sensors, most of which have nonlinear outputralations. In application, it is very important to linearage them. This papersuggests a kind of circuit, named smooth nonlinear A/D converter, with thefeature of simplicity and effectivenss. It can be applied in some sensors withnonlinear characteristics. When using for the sensor of Pt resistance type, withthe range of --200℃ to + 650℃, the absolute error is less than 0. 5℃, which isnot so easy to realize in other of linearization. The paper also suggests thecombination of smooth type with piecewise linear nonlinear A/D converter inorder to improve the precision of linearization and enlarge the fields ofapplication.

关 键 词：线性化处理 铂电阻 线式 A/D变换 基准电压 非线性关系 线性化法 输出特性 仪器仪表学报 输出信号 

分 类 号：TP2[自动化与计算机技术—检测技术与自动化装置]