Implementation and applications of an coded electrical instrument with anti-interference ability
Luo Xian-zhon · Progress in geophysics · 2014
To improve the anti-interference ability of the electrical and electromagnetic survey instrument,a coded pseudo random pulse sequence is used as the driving source,and a set of data acquisition hardware system for electric or electromagnetic survey has been developed.The algorithms of data processing and software implementation are based on the technologies of correlation detection of pseudo-random sequences and over sampling which have been used successfully in communication for anti-interference improvement.The effectiveness of the hardware and software system is proved through a series of laboratory simulation test and field tests of various survey sites,and superior anti-interference ability has been exhibited through comparison tests.It is suitable for surveys in strong anti-interference environment,such as mining area,near power station or railway,urban and suburb area.etc.