SU479065A1 - Device for aero geophysical intelligence - Google Patents

Description

one

The invention relates to the field of geophysical prospecting and can be used, for example, for complex electrical and magnetic prospecting.

The known devices for airborne geophysical reconnaissance, which include a current pulse generator, a generator circuit, a meter, an induction magnetic receiver, gating blocks, and a control and timing circuit, limit the speed of movement of the carrier due to the long duration of one measurement cycle.

The purpose of the invention is to increase the effectiveness of complex and electrical and magnetic surveys.

This is achieved by the fact that the output of the magnetic modulation sensor is connected to the magnetic channel recorder through the primary gating unit, a pulse amplifier, the secondary gating unit and the direct current amplifier with the converter, and the control of the primary and secondary gating units is performed by the control And timing unit.

FIG. 1, 2 are given the block diagrams of the proposed device.

The device contains a bipolar pulse generator 1, a loop generator 2, an induction sensor with periodically saturated screen 3, a primary gating unit 4, an impulse amplifier 5, a secondary gating unit with storage 6, a DC amplifier with a converter 7, a recorder 8, a secondary gating unit with storage device 9, direct current amplifier with converter 10, self-compensation unit 11, recorder 12 of the magnetic channel, mine generator

pulses 13, trigger divider 14, multivibrator delay 15, multivibrator strobe pulses 16, matching circuits 17 and 18, excitation unit 19, multivibrator delay 20, forming a cascade 21, circuits

coincidence 22 and 23, magnetic survey channel 24, electrical prospecting channel 25.

The proposed device works as follows.

The leading edges of the pulses of the clock pulse generator 13 are triggered by the excitation unit 19, from which rectangular pulses of alternating polarity are fed to the excitation winding of the induction sensor 3. The output signal from the induction sensor 3 is fed to the primary gating unit 4, in which two strobe pulses are formed. The gated signal through the pulse amplifier 5 is fed to

secondary gating unit 9.

The formation of command pulses for controlling the keys of the primary 4 and secondary 6 gating blocks of the magnetic channel is carried out by the shaping cascade 21. The rectangular-shaped pulses equal in duration to the current pulses in the excitation generator 19, the leading edges trigger the single-delay multivibrator 20, the rectangular pulses from which - fall on the forming cascade 21 and launch it with the front and rear fronts.

Strobe pulses from the output of the forming cascade enter the primary gating unit 4. Distribution of command pulses to control the keys of the secondary gating unit of the magnetic channel is made using two matching circuits 22 and 23. The pulses from the output of the forming cascade 21 are fed to the first inputs of both matching circuits, and their second inputs receive pulses taken from different arms of a single-stable multivibrator.

Object of the Invention Aero-geophysical reconnaissance device comprising a magnetic modulation sensor, a first gating unit, an amplifier, a clock generator, an electrical channel including a bipolar current generator, a generator circuit, a control and synchronization unit, a secondary gating unit, an amplifier

a direct current with a converter and a recorder, and a magnetic channel consisting of a generator of bipolar pulses of the excitation voltage of the recorder, an autocompensation unit and a magnetic channel recorder, characterized in that, in order to increase the efficiency of complex electrical and magnetic prospecting, the output of the magnetic-modulation The sensor is connected to the magnetic channel recorder through a primary gating unit, a pulse amplifier, a secondary gating unit, and a direct current amplifier with the forming, as the primary and secondary units are connected to the gating blocks

control and synchronization.

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