| The thesis introduced a kind of Wireless Electromagnetism (WEM) overall structural design and function of geological receiver apparatus system, the receiver machine used mainly for receiving 0.1 Hz that the ultra lowfrequency transmitter launches. Low frequency electromagnetic radiation field signal of 300Hz (can give consideration to natural field test ), receive two electric field weight (Ex, Ey ), and three magnetic field weight signal pass to State Seismological Bureau which carry on earthquake monitor or utilize , perform software perform underground mineral deposit distribute and used in prospecting .Current domestic similar products have not been more mature, mainly rely on imported products. Currently more mature foreign products mainly geological receiver Canada Phoenix-Geophysics companies V5, V6, V8 series geological receivers and Germany Metronix companies ADU-06 geological receiver, but also the University of St. Petersburg, Russia developed ACF-2.2 geological receivers.The thesis first introduced the geological receiver software and hardware design and the overall function plan structure, And then the dissertation discusses how to develop the Device Driver under Linux Operation System. This thesis discusses how to realize the Device Driver of this geological receiver equipment under Linux in detail. The A/D transformation chip driver was provided the more flexible mechanism, Provided the channel to choose and to establish the pre- frequency division function, SPI(Serial Peripheral Interface) driver has provided the double buffer mechanism for ARM and DSP correspondence, this mechanism has solved ARM and DSP correspondence transmission speed problem. Finally to inserts the type Linux file system to conduct the research to analyze and to improve, aimed at JFFS2 (Journaling Flash File System v2) file system existence some insufficiencies to make the certain analysis and the improvement specifically, mainly displayed in this file system the setup time is too long, the verification mechanism waits for the development and garbage collection mechanism and wear-leveling mechanism and so on severalaspects, moreover to the JFFS3 file system which designed has been making the certain analysis and the research.Applies the Linux system in this equipment, as a result of Linux system many merits, for the data real-time transmission, the data complete preservation, the equipment easy to carry, provide the very good support. And with overseas compared, the product also had the big enhancement in the performance aspect, this equipment success development for domestic provided the advantageous tool in the geological prospecting aspect. |
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