Research On Detection System Of Electrical Device In A Certain Kind Of Aircraft

Airborne electrical devices control the operation of electrical equipment, playing an important role in flight. Safety of flight directly depends on whether the performance of electrical devices is well or not. In order to detect the quality of their components, detection system of electrical devices is needed.Firstly, this paper analyzes the important role of airborne electrical devices in secure flight, as well as the characteristics and limitation of existing detection system is introduced. Then, the detection system which is based on the idea of virtual instrument is brought up. In the upper computer, LabVIEW 8.5 is used for programming the selection interface of test file and the display interface of test results. In the hardware part, Programmable controller PLC operates as central control unit. This design adopts Siemens S7-200PLC, controlling bottom circuit to complete detection. The host computer sends the test files to PLC, they are stored in different data storage area according to the kind of the files. When the testers operate, different files are performed according to different testing tasks. When the test is completed, the test results are stored in the data area, offering the computer at any time. The transmission and exchange of data between host computer and lower computer is realized by serial communication.This detection system overcomes the shortcoming of wasting time and lower precision of manual testing. This system has visual and friendly interface, and works reliably, stably and commonly.