SU127769A1 - The method of nuclear resonance geomagnetic measurements and the device for implementing the method - Google Patents

Description

A method and apparatus for nuclear resonance geomagnetic measurements are proposed.

 The proposed method has a higher measurement accuracy compared to the known methods, since it allows one to take into account variations at one point automatically, while using conventional methods of magnetic exploration, taking into account variations on individual points, this cannot provide sufficient accuracy of geomagnetic measurements.

The essence of the described method consists in the simultaneous operation of two sensors connected by wire or by radio, one of which forms part of a nuclear resonance magnetic survey device, and the other part of a nuclear resonance variation station. Using a frequency meter, the frequency difference between the two sensors, proportional to the value of the geomagnetic field, corrected for variations, is measured.

The implementation of the proposed method is provided by using a device with imaging and variational sensors, the first of which is configured to be connected alternately to amplifiers and a source of polarizing current using a switch controlled by a clock generator and a radio transmitter controlling a modulator to which signals of nuclear precession and pulses are applied the second is configured to switch from a polarizing current source to the amplifier and back again using pe.ie, which controls received by radio pulses of a clock generator and a frequency meter, measuring the frequency difference between the two sensors.

Pa figs. 1 shows the scheme of the shooting device; in fig. 2-scheme of variational sod-resonant device.

The sensor / survey device is connected to a source of polarizing current 4, then amplified by a pulse generator 5 controlled by a clock generator 5, and then amplified by a pulse 5. The amplified nuclear precession signal and the square clock pulses of the clock generator (duration of which corresponds to the polarization time) approach TC to the modulator 6, which controls the amplitude or frequency of the radio transmitter 7.

The signals are received by the instrument with a radio receiver 8, where separation per clock pulse and nuclear precession occurs. Clock And Mpulse controls the operation of the relay 9, which switches the sensor 10 from the source of the polarizing field 11 to amplify, 12 and vice versa. The nuclear precession signal from the variational instrument is amplified by the amplifier 12 and then fed to the mixer 13 with a filter, to which the standard frequency from the quarter generator 14 is also supplied. In the mixer 13 there is a beating between the frequency of the variation sensor and the frequency of the generator. This frequency and frequency from the survey device (from the radio receiver 8 goes to the second mixer and filter 1: where the difference frequency is allocated, which is proportional to the magnetic field corrected for variations, which is recorded by the frequency meter / 6.

The subject invented

1. A method of nuclear resonance geomagnetic measurements, characterized in that in order to increase the accuracy of measurements using a frequency meter, the difference in the frequencies of two connected wires or the like of sensors is measured.

2, A device for implementing the method but n. 1, suck the slash and-; imaging and variational turret-resonance devices, characterized by trimetry of imaging and variational sensors, the first of which is configured to be connected alternately to an amplifier and a source of zero current using a switch controlled by a clock generator and a radio transmitter of a modulator to which a nuclear signal is supplied the precessions and pulses of the clock geyerator, and the second one is capable of switching from the source of polarizing current to the amplifier and back by means of a relay the claimed taken radio clock pulses and the frequency measured it wn razgyusti frequencies of both sensors.

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