Apparatus for locating buried conductors using phase-shifted signals

摘要: An apparatus for locating obscured conduits, such as buried cables, employs a novel signal processing technique to increase the sensitivity of apparatus, particularly in congested areas. The cable is similar prior art dual-peak detection devices which compare signals from two parallel induction coils, but phase shift introduced into one comparison. This serves minimize effects side minima response curve devices. effect enhanced by adding gain mismatch detected signals. locator preferably operates with analog reduce expense.