论文部分内容阅读
本文介绍一种新型的定温式热偶真空计,概述了皮拉尼真空计长期以来能处于重要地位的原因,对它的特点及不足之处进行了分析,说明了定温式热偶真空计比皮拉尼真空计有何特点。简单地论述了热偶规管的构造及工作原理。扼要地说明了定温调节的方法及调节对象的特殊性——隔离调节。调节电路采用斩波稳零CMOS器件和光电耦合器等构成的高增益比例调节。此外,还介绍了定点、定域控制电路的工作原理,刻度曲线的测定方法,本仪器特点,及其应用实例。
This paper introduces a new type of constant temperature thermocouple vacuum gauge, an overview of Pirani vacuum gauge can be an important reason for a long time, its characteristics and shortcomings were analyzed, illustrates the constant temperature thermocouple vacuum ratio Pirani vacuum gauge what are the characteristics. Briefly discussed the structure and working principle of thermocouple. Briefly explained the method of temperature regulation and the particularity of regulation object - isolation regulation. Regulator circuit using chopper-stabilized CMOS devices and optocouplers and other components of the high-gain ratio adjustment. In addition, the working principle of fixed-point and local control circuit, the measuring method of scale curve, the characteristics of this instrument and its application examples are also introduced.