DEVICE FOR LOGGING ELECTROMAGNET PROBING Russian patent published in 2010 - IPC G01V3/18 

FIELD: mining.

SUBSTANCE: device comprises k three-element probes, consisting of generator and pair of receiving coils, switched generator of working frequencies with power amplifiers, switched generator of heterodyne frequencies, k inlet switches, k high-frequency amplifiers, having inlets of amplification control, track of intermediate frequency, k circuits of automatic amplification control, amplitude metre, switching unit, computer unit, multiplexer of high frequency signals, demultiplexer of signals from metre of k calibration circuits amplitudes. Inlet switches and circuits of calibration alternately connect signals A₂ and A₁ from receiving coils of probes, their difference signal ΔA and calibrating signal to inlets of device, and these signals are converted by amplification-conversion track into digital code and arrive to computer unit. Computer unit corrects signals by calibrating signal and calculates ratios |A₂|/|A₁|, |ΔA|/|A₁|, |ΔA|/|A₂| and phase difference.

EFFECT: enhancement of functional capabilities, increased accuracy of measurements and operational reliability.

4 dwg