【摘要】 针对现有的气密性检测仪检测精度低和效率不高等问题,根据差压法检测原理,设计一种基于ARM9处理器的差压式气密性检测仪。该仪器通过控制气控阀对被测件进行充放气,利用差压传感器和A/D模块对数据进行采集并判定。重点介绍了A/D、LCD显示等模块的硬件电路,以及操作系统的内核、文件系统等软件的移植。试验结果表明:系统检测的结果具有精度高、速度快的特点。更多还原

【Abstract】 In allusion to the existing air tightness detector low accuracy and efficiency,according to the differential pressure method,this paper designed a differential pressure type air tightness detector based on ARM9 processor.The instrument used the pneumatic control valve to control the device being tested for air inflation and deflation,and then collected data and made a judgement by using the differential pressure sensor and the A/D module.Focused on the A/D,LCD display module hardware circuit,and the operating system kernel and the file system transplant.The experimental results show that the system test results with high precision and speed of characteristics.更多还原