Design And Implementation On Repeater And Remote Terminal Of Data Acguisition System Onboard

With the continuous development of aerospace technology, Airborne DataAcquisition System has become necessary during the test flight, and presentscomprehensive, systematic, multi-functional features gradually. In order to tramistreal-time parameters of each sensor fastly and efficiently, this paper designs andachieves Repeater and Remote Terminal of Data Acquisition System Onboard.The Airborne Data Acquisition System includes Controller, Controller Power Plug,Bus-powered Unit, Repeater, and Remote Terminal. This article puts forward a kind ofuser defined SDX bus which can realize the connection between Repeater and RemoteTerminal and complete the communication of bidirectional data according to thecharacteristics of the equipment interfaces.With the modular design concept, this thesis achieves the hardware and softwaredesign of Repeater and Remote Terminal. With FPGA chip as its core, hardware designimplements interface conversion, drive, and power supply. In the part of the softwaredesign, the Repeater amends and drives the received code of SDX-bus as well ascontrols the data transmission direction so as not to impact between the up-data anddown-data, the Remote Terminal answers the SDX protocol, embedded implementationof Wishbone bus to exchange data with the sensors. Finally, this paper tests the wholesystem, the results prove the correctness of the design.