Design And Implementation Of Automatic Test Platform Of Airborne Oxygen Monitor

Oxygen monitor is responsible for regulating and controlling the oxygen supplied for pilots, and its reliability relates to the safety of the whole crew. So the detection for monitor’s reliability is necessary before being used officially. The state-of-art method is manual test with low test efficiency, long test period and complex operation. A full automatic test system of oxygen monitor is urgently required to tackle these issues.This dissertation mainly focused on the test of all factors of oxygen monitor, and the major work is as follows:Firstly, we investigated the major technologies(Single Chip Machine, Industrial Personal Computer, Programmable Logic Controller, etc.) in industrial control field, and analysed the merits and defects of the manual test system, and then proposed the whole design of the automatic test platform of airborne oxygen monitor.Secondly, the hardware system was implemented following the prescribed design scheme. In the hardware system, IPC is the host computer, the data acquisition card is the slave machine, and oxygen monitor is the device to be measured. For later function extension, the outside extension card technology is adopted in the hardware system. To approach the reality, the negative pressure cabin is adopted to simulate the high altitude environment, achieving the maximum recovery of the site. The negative pressure cabin with the innovational algorithm is easy to control and operate, the response time comes up to the requirement.Thirdly, the software system was designed to cooperate with the hardware system. The software runs on Windows7 operating system, Visual Studio 2013 is used as the IDE tool and C sharp is used as the programming language. The software has friendly user interface, the results are visible and can be saved at any time for the later comparison and calibration. The high cohesion and low coupling design patterns were followed for good expandability of the software.Finally, amounts of experiments proved that the test platform of oxygen monitor we designed has short test period, high test efficiency and simple operation, also it has been successfully accepted by the company and applied to the product testing process, it has the practical use value.