The Research Of Nuclear Geophysical Data Acquisition System Based On ARM-μCLinux

Nuclear geophysical perambulation is a comprehensiveness subject,which involving nuclear detection technology,electronic technology and computer,can analyze the relevance information and parameter of nuclide accurately and fleetly.Presently,it has applied to the uranium mine perambulation,geological mapping, oil gas perambulation fields as well as seeking various metal and metalloid mineral and etc. Among them, collecting and processing nuclear geophysics data is one of important subjects of nuclear geophysics perambulation study. It will be having direct impact to accuracy and feasibility measuring result.The design of system,on the basis of S3C44B0X 16/32-bit RISC microprocessor with its ARM7TDMI core,migrates embedded uCLinux OS,JFFS2 file-system,and primarily migrates MiniGUI libraray.With the microprocessor rapid computing ability and the complete set of common system peripherals, uCLinux OS and abundant software resources based on Linux, introductory code of system are compiled,drivers of LCD's and MCA's hardware equipment are compiled and integrated,application of GPS and GPRS are developed.There are some advantages in the research result of this paper, as follows:1. The acquisition system of Nuclear data has the 16/32-bit ARM7TDMI as the controlling core, including LCD display, clock and memory circuit.The system can stably work at 60MHz,could control it to accomplish the process of data acquisition, calculating and analyse without computer. The system has some features, such as low power, miniaturization, high proportion of quality and price and etc.2. The design realized the migration of the embeddedμCLinux OS. With the development of embedded OS, the migration ofμCLinux OS and the aboundance software resources based on it.This can not only inhance the stablitiy of the system but also can rapidly achieve the developmnent of the nuclear instrument and a complitable spectra software.3. The design realizes the migration of jffs2 file system ported onμCLinux OS, safely and reliably manages bootloader program of the system, kernel image file of theμCLinux OS, the program and data of gamma spectra software.4. This design primarily realizes the function of GPS real-time orientation and GPRS data wireless transmission.