高精度新型调制变送器设计与应用  

Design and application of new type high-accuracy modulation transmitter

作　　者：李正兵[1] 蒋兴加[2] 王小丽[1] 

机构地区：[1]西安航天动力试验技术研究所,陕西西安710100 [2]广西机电职业技术学院,广西南宁530007

出　　处：《火箭推进》2011年第5期69-73,共5页Journal of Rocket Propulsion

基　　金：中国航天科技集团公司支撑项目

摘　　要：从传感器测量物理量的原理出发,通过对传感器输出信号的特点分析,阐述了高精度新型调制变送器获取被测信号的设计思想与组成单元,详细分析了变送器关键电路设计原理。电容变送器在试车台液位远传系统中的成功应用表明,新型调制变送器具有精度高、通用性强、使用可靠等特点。Proceeding from the principle of physical quantity measurement with a sensor,the design idea of catching the detected signal by the high-accuracy modulation transmitter and its composition are described by analyzing characteristics of the sensor output signals.The design principle of the key circuits in the transmitter is analyzed in detail.The successful application of the capacitance transmitter in the long range liquid level transmission system of the rocket engine test-stand shows that the new modulation transmitter has the characteristics of high accuracy,generalization and high reliability.

关 键 词：信号变换 交流激励 变送器 

分 类 号：V434-34[航空宇航科学与技术—航空宇航推进理论与工程]