基于嵌入式的差压式容积补偿气体泄漏检测装置的研究  

Differential pressure volume compensation leak detection system based on embedded system

作　　者：熊四昌[1] 李栋[1] 高玉科 黄坚[1] 

机构地区：[1]浙江工业大学特种装备制造与先进加工技术教育部重点实验室,浙江杭州310014

出　　处：《机电工程》2014年第1期38-42,共5页Journal of Mechanical & Electrical Engineering

基　　金：浙江省科技计划资助项目(2008C21146);浙江省重中之重学科开放基金资助项目(未提供)

摘　　要：针对常规差压式气体泄漏检测装置在各种被测容器容积未知的场合不能很好地应用的问题,提出了基于差压式容积补偿法原理的嵌入式控制系统的研究。设计中采用了具有较高处理速度的S3C2440作为主控制器,在结合模拟信号前端采样滤波电路、LCD触摸屏、串口控制终端、以及比例阀、电磁阀、步进电机等驱动电路的基础上,搭建了硬件结构,在Linux2.6.30内核下编写了相关驱动并使用Qt/E实现了人机交互界面。最后,通过与另一套使用高精度研华USB4716数据采集卡开发的泄漏检测系统进行了对比分析。实验及研究结果表明,该嵌入式系统工作稳定,误差保持在允许范围以内,测量结果可信度比较高。Aiming at the problem that the differential pressure gas leakage detection system can＇t be used in some volume unknowable tests, a new device based on the principle of differential pressure volume compensation leak detection was hoped to solve the problem effectively. The S3C2440 which has a high processing speed was used in the embedded system design, and combined with stone related circuits, like the analog circuit, proportional valve circuit, and stepper motor driver circuits, the hardware structure was provided. The software pail was de- signed on the Linux 2.6.30 kernel, some drivers programs were contained, a human interface was built on Qt/E kits. Finally, some compar- ative analysis were made between these embedded system and another similar system worked on PC. The results indicate that the system works stably and the relative error always occurs in allowed range, so it satisfies the portable and convenient function and has practical worthiness.

关 键 词：容积补偿 泄漏检测 S3C2440 嵌入式系统 S3C2440 

分 类 号：TH863[机械工程—仪器科学与技术]