Underground Target Location, Identification And Signal Acquisition Processor Design

The object of this dissertation is signal process algorithm and signal acquisition process device of GPR. The signal acquisition process device and signal process algorithm are"brain"and"thinking"of GPR.At first, analyze structure of GPR and signal characteristic in order to search for signal process algorithm. Study several algorithms: localization underground target algorithm base on step threshold of block energy,localization underground target algorithm base on the best automatic curve fitter,recognition underground metal target algorithm base on phase of target echo. Test above algorithms using signal acquired on field. The result is satisfying. Localization underground target algorithm base on step threshold of block energy can detect target, count and locate them. It's virtue is good resistance to clutter. It's shortcoming is large number of operation times. Localization underground target algorithm base on the best automatic curve fitter can survey velocity of electromagnetic wave in underground medium, and locate underground target. It's virtue is small number of operation times. It's shortcoming is subject to clutter. Recognition underground metal target algorithm base on phase of target echo can recognize buried mental target. It's shorting is too many false alarm.The second introduce simply signal acquisition process device based signal acquisition board,embedded mother board and localization board, introduce mostly the localization board designed by myself. The last, introduce the scheme of signal acquisition and process device based on master and slave machine. Validate at large the scheme of hardware system and data. Design slave machine--acquisition process signal board. signal acquisition process board work stably.