SU113415A1 - The method of aeroelectromagnetic with magnetic dipoles and a device for implementing the method - Google Patents

Description

Existing devices and methods used for aerial prospecting with magnetic dipoles have the disadvantage that they do not automatically adjust the compensating current to eliminate decompensation of the primary field caused by a change in the mutual arrangement of the nacelle with the receiving frame and the aircraft.

In the proposed method and device, this disadvantage is eliminated by the body; the adjustment of the compensating current is made by high-frequency voltage from the receiving frame created by an auxiliary electromagnetic field, the intensity of which varies depending on the distance between the aircraft and the nacelle.

The drawing shows the circuit diagram of the proposed device, including the following components: a generator frame /, two receiving frames 2 and 5, a selective filter 4, a smoothing filter 5, a variable resistance b, a radio tube 7 of the Varium type, a variable resistance 8, a variable resistance, 9, a source of direct current 10, a phase-shifting bridge I, a variable resistance 12, a driving oscillator 13, a powerful amplifier 14 and an auxiliary oscillator 15.

A alternating voltage of frequency 1 Mzeii is supplied to the generator or special frame / from the auxiliary generator 15. The voltage of the two operating frequencies (from 500 to 1000 Hz) is supplied from the master oscillator 13 through a powerful amplifier 14. As a result, currents of three frequencies flow in the generator box, which create the corresponding electromagnetic fields. The alternating current with a frequency of 1 mgg11 may be significantly less than the operating frequency currents.

In the nacelle attached to the cable to the aircraft, the bottom (or one) receiving frames of 2 N 3 are installed. Frame 2 1: taps for receiving the operating frequency signal, second frame 5 for receiving the signal with a frequency of 1 MHz After pre-amplification with., found in both frames, the cable enters the reinforcement rubbing blocks. Voltage for

No. 113415

compensation emf from the normal (primary) field is removed from the resistance / 2, which is included in the circuit of the generator frame. After adjustment in amplitude and phase with the help of a potentiometer and a phase-shifting bridge 11, it is fed to the control grid of a lamp 7 of the Varimus type.

At the same time, two more voltages are applied to the control grid of the lamp: one from the DC source 10 and the second from the receiving frame in which the emf is induced. with a frequency of 1 MHz.

The high frequency alternating current is amplified, passes through a selective filter 4, is rectified, is passed through a smoothing filter 5 in such a way that a constant voltage is applied to the lamp grid, the magnitude of which varies depending on the change in the intensity of the high-frequency electromagnetic field, t that is, from the distance by plane and gondola. The polarity of the voltages indicated above on the grid of the TWO above mentioned is adjusted so that an increase in the voltage supplied from the frame entails an increase in the lamp opacity ratio. Changing the latter allows an increase or decrease in the amplitude of the compensating current, which is removed from the resistance 8 included in the anode circuit of the lamp. The change in the distance between the nacelle and the plane is influenced by the magnitude of the compensation current / i.

With the help of variable resistances of the 6, 8, 9, and 12 n phase-shifting bridge, it can be chosen so that during the flight the emf from the primary floor has always been compensated. The adjustment of the compensating current is made before departure, at the aerodrome, by assigning the nacelle to different distances with the generator and measuring devices switched on.

Subject invention

1. An aeroelectromagnetic survey method with magnetic dipoles using electrical current compensation of the primary electromagnetic field, characterized in that, in order to eliminate decompensation of the primary field caused by changes in the relative position of the nacelle in which the receiving frame is located, the compensating current is automatically adjusted the voltage from the receiving frame created by the high-frequency auxiliary field, the intensity of which varies depending on the distance between the aircraft and the gondola.

2. A device for carrying out the method of claim 1, characterized by using a Variume type lamp as a source of compensating electric current, on the control grid of which a regulating high-frequency voltage is supplied from the receiving frame, after converting it into direct current by straightening and smoothing by filter and use to create a high-frequency electromagnetic auxiliary generator included in the circuit of the generator frame.