大气数据仪表校验系统的设计与实现  

Design and Realization of Atmosphere Meters Calibration System

作　　者：崔保健[1] 周德海[1] 侯兴勃[1] 

机构地区：[1]92493部队89支队

出　　处：《计算机测量与控制》2009年第7期1435-1437,共3页Computer Measurement &Control

摘　　要：针对飞机大气数据计算机和测试仪表的校验问题,在分析了大气数据仪表的特点的基础上,基于嵌入式计算机控制技术和精密气压控制技术,提出了一种智能大气数据校验系统的设计方案;从控制方面,系统采用双传感器、普通硅压阻压力传感器和数字石英压力传感器,模拟传感器具有高速响应特性,将其作为过程控制传感器,保证装置的动态响应性能;数字石英压力传感器的精度达0.01%F.S,作为基准压力传感器,保证系统准确度;采用双闭环控制方案,模拟闭环采用电子电路设计实现,采用模拟硅压阻压力传感器和模拟PID控制电路构成模拟控制闭环;采用数字式压力传感器和计算机构成数字PID控制闭环,数字闭环通过计算机、数字传感器、软件、串口和计算机串口实现;实验证明,该装置升降速度的输出准确度优于0.02%F.S,控制稳定性0.002%F.S。In order to solve the problem of Atmosphere Data Meters verification, based on analysis of the characteristics of the Atmosphere Data Meters, Basing on embedded computer and precision pneumatic pressure control technology, a new design of intelligent atmosphere data meters verification system is designed. In view of control methods, compared with the traditional control system, double pressure sensors--an analog silicon pressure sensor and a precision digital quartz pressure sensor are introduced, the analog sensor has a high speed response to ensures the control performance, it is named as process control sensor; and the digital sensor has a high accuracy up to 0.01% F. S, it acts as standard sensor to guarantee the output accuracy. Two feedback loops are adopted, the analog loop is designed using a silicon pressure resistor sensor and a traditional PID analog electrical control circuit, the numeric loop is completed by a computer, a digital sensor, control software and RS232 port. The experiment result shows that the accuracy of the pneumatic pressure output is better than 0.02%F. S and its control stability is about 0. 002%F. S.

关 键 词：压力传感器 气压控制 嵌入式 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]