| Along with the development of electronics and computer technology, the data acquisition system of planeload has developed a mass of analogy signal, data signal and all kinds of communication interface signal real time acquisition, process, transmission and storage system from low volume data acquisition, display and record system. The paper introduces the multi-channel data acquisition system by planeload, importantly real time acquisition, display and record the analogy signal, three phase synchronization implement signal, on-off signal, ARTNC429 signal and serial data of inertial navigation equipment and atmosphere equipment, at the same time, the serial clock receive signal from GPS treat as time standard of acquisition data.The paper solves the multi-channel analogy data acquisition by applying a few analogy switch chips; applying the way of converting parallel data to serial data to settle multi-channel on-off signal; writing the standard time to acquisition data by the GPS module and the time-lapse technique; providing the kinds of peripheral interface in the AT91RM9200 ARM ON-CHIP SYSTEM; guaranteeing the data of the real time acquisition, display, transmission and storage by Linux operating system.The test result indicates the design can achieve the real time data acquisition, data display, data transmission and data storage, embodies ARM has many advantages such as high-powered, high integration level, low power dissipation, low cost, low development difficulty; Lunix operating system is the opening source code operation system, holds abundance of software resource, and has the powerful function, high efficiency, stabilization and multitask kernel, supports ARM, be provided with the perfect network communication, graphic and file manage mechanism, sustains a great lot peripheral equipments, the enriched drive, has many advantages etc, example that the size and function can be customized.Selecting ARM chip and Linux operation system improves the system dependability and... |
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