Application Of Pseudo Random Signal Electric Instrument

There is a long history of study and development of electric explorationmethod. The method has been widely used in mineral exploration, geophysical exploration, urban water resource exploration, geological disaster monitoring, oil exploration and development fields. The results of electric exploration are very good so that it was used in geologic survey in recent years.Due to the development of Contemporary Humanities and social and economic activity, all kinds of electromagnetic interference generally exists. Electricmethod instruments often disturbed by interference cannot obtain the effective exploration data. In order to improve the signal-to-noise ratio by increasing the power supply mode of some instruments, which have achieved certain results, but the work efficiency is low, and the equipment is heavy so that it is not convenient for field application. Weak interference area can work by increasing power, but in strong interference area, the method doesn’t work well.In order to solve the problem of electromagnetic interference, electrical instrument using code with the correlation detection method of pseudo random code, and data acquisition of massive anti aliasing filter way of development carry outcircuit theory, flume experiment, the different interference interference test and engineering example, understand the encoding electrical instrument anti-interferenceeffect research. Through a series of tests, it is proved that the actual coding electrical instrument can work in the condition of-40DB noise, acquisition to conformto the geophysical exploration related standards of accuracy and precision data. In the future for the integrated exploration area, ore district, the old mines, deep provides new equipment revolutionary prospecting, hidden and half hidden ore exploration; used for geological disasters, urban pipeline, engineering survey, soil disease, empty, active fault prospecting service.The article mainly introduces the development history of coded electrical instrument and its research present situation, and improve the application to the ear th by geographical exploration field upgrades, obtain exploration data with high precision, and achieved rich results and test results of exploration.