Acousto-magnetic synchronous cable fault fixed point detection apparatus based on high-performance DSP

The utility model relates to an acousto-magnetic synchronous cable fault fixed point detection apparatus based on a high-performance DSP. The acousto-magnetic synchronous cable fault fixed point detection apparatus is formed by combination of a 533MHz high-performance Blackfin DSP processor and peripheral circuits thereof, and comprises external circuit systems such as an all-directional high-sensitivity ground penetrating microphone sensor and a conditioning circuit thereof, a digital audio amplifier and a hi-fi audio grade timbre output earphone, and a TFT true color liquid crystal screen and the like. An empirical mode decomposition filtering technology is adopted by data detection, and an intelligent background noise reduction function is fulfilled. Real fault points of a cable from a test point can be calculated by two methods, one method is calculating volume of an impulsive discharge noise, and the other method is calculating difference of time when an acoustical signal and a magnetic field signal which are simultaneously transmitted at a fault point discharge time reach the sensor. The acousto-magnetic synchronous cable fault fixed point detection apparatus has extremely high calculating precision and extremely fast calculating speed, high electromagnetic interference resistance capability is high, multiple functions are synthesized, and integrated level is high.