SU911389A1

SU911389A1 - Proton magnetometer

Info

Publication number: SU911389A1
Application number: SU802932467A
Authority: SU
Inventors: Валерий Николаевич Сапунов; Генрих Николаевич Гусев
Original assignee: За витель I ----Я,:.., I f :- .-.;-,.I
Priority date: 1980-04-30
Filing date: 1980-04-30
Publication date: 1982-03-07

Description

(5) ПРОТОННЫЙ МАГНИТОМЕТР(5) PROTON MAGNETOMETER

II

Изобретение относитс к устройствам дл измерени магнитных полей, в частности к протонным магнитометрам , и может быть использовано В магнитной разведк полезных ископаемых .The invention relates to devices for measuring magnetic fields, in particular to proton magnetometers, and can be used in magnetic prospecting minerals.

Известен протонный, магнитометр, содержащий последовательно соединенные датчик, усилитель сигнала прецессии , ограничитель, умножитель с фазовой автоподстройкой частоты и счетчик импульсов, а также команд-: ный блок, соединенный со вторым входом счетчика и первым входом блока совпадений, коммутатор и триггер, один вход которого соединен с выходом командного блока, а второй с выходом блока совпадени 113.A proton, magnetometer is known that contains a sensor connected in series, a precession signal amplifier, a limiter, a phase locked loop multiplier and a pulse counter, and a command: a unit connected to the second input of the counter and the first input of the coincidence unit, switch and trigger, one input which is connected to the output of the command block, and the second with the output of the match block 113.

Недостатком известного устройства вл етс ограниченный диапазон измерений и недостаточна точность измерений из-за по влени систематической ошибки за счет фазового сдвига между реальным сигналом прецес- ,A disadvantage of the known device is the limited measurement range and insufficient measurement accuracy due to the occurrence of a systematic error due to a phase shift between a real precess signal,

:ии, возникающим в датчике после окончани пол ризации, и фазой выходного сигнала, получаемогб с усилител частоты. Фазова ошибка (сдвиг) по вл етс за счет резонансных влений , возникающих в датчике и усилителе сигнала прецессии. По вление такой ошибки приводит к тому, что при синхронной пол ризации рабочее вещество не допол ризовываетс , и : AIs that occur in the sensor after the termination of the polarization and the phase of the output signal are obtained from the frequency amplifier. The phase error (shift) is due to the resonance effects that occur in the sensor and the precession signal amplifier. The occurrence of such an error leads to the fact that, during synchronous polarization, the working substance is not doped, and

10 за счет этого отношение сигнал/шум . получаетс меньше, чем могло бы быть, что Приводит к уменьшению точности измерений в широком диапазоне частот, т.е. высока точность обеспечиваетts с в ограниченном диапазоне измерений .10 due to this signal-to-noise ratio. less is obtained than it could be, which leads to a decrease in measurement accuracy in a wide range of frequencies, i.e. High accuracy ensures a limited range of measurements.

Цель изобретени . - расширение . диапазона измерений и увеличение точности .The purpose of the invention. - extension. measuring range and increased accuracy.

30thirty

Claims

This goal is achieved by the fact that in a proton magnetometer with synchronous polarization, containing a series-connected sensor, a precession signal amplifier, a limiter and a frequency multiplier connected to the first output of the pulse counter, a command block connected to the second pulse input counter 14 of the pulse multiplier and with the first input of the block of matches two other inputs of which are connected to a frequency multiplier, a switch whose output is connected to the sensor input, and a trigger, one input of which is connected to the output of the block drops, and the output is connected to the switch input, a second block of matches is additionally added, a delay interval generator and an analog-to-digital converter, the input of which is connected to the output of the precession signal amplifier, and the output is connected to the input of the delay interval former, connected to the first input the second block of matches, the second input of which is connected to the command block, and the output of the second block of matches is connected to the second input of the trigger. The drawing shows a structural diagram of a proton magnetometer. The magnetometer contains a series-connected sensor 1, amplifier 2 signal precession. limiter 3, frequency multiplier and counter 5 PULSES. The frequency multiplier k includes the phase-connected Phase Detection 6. filter 6. low-frequency filter 7, a controlled oscillator 8, and a frequency divider 9, the input of which is connected to the output of the controlled oscillator 8, and one of the outputs of the frequency divider 9 is connected to the second input phase detector 6. The magnetometer also contains a command unit 10, one of the outputs of which is connected to counter 5, the second to the input of a low-frequency filter 7, and the third to one of the inputs of the first block 11 matches. The other two inputs of the first block 11 matches connected to the two outputs of the frequency divider. The output of the first coincidence block 11 is connected to one of the inputs of trigger 12, the output of which is connected via switch 13 to sensor 1. The output of preamplion amplifier 2 is connected to the input of analog-digital converter I, the output of which is connected to the input of the delayer 15, the output of the imaging unit 15 of the delay interval is connected to the first input of the second block of 16 matches, the second input of which is connected to the fourth output of the command block 10, the output of the block of 16 matches is connected to the second input of the trigger 12. The magnetometer operates a trace in this way. After the end of the polarization pulse, the signal from sensor 1 is fed through amplifier 2 of the precession signal and limiter 3 to the purity multiplier. Command block 10 prepares a pulse counter 5 and a frequency multiplier for the Information Record. After the pulse count ends, the nuclear precession signal continues for the time required to synchronize the polarization (coarse tuning). When the pulses coming from the command unit 10 and the frequency divider 9 of the Multiplier A frequency coincide, the first coincidence unit 11 generates an enable pulse that triggers the trigger 12 and then goes to the switch 13. The nuclear precession signal from the amplifier 2 to the analog-to-digital converter 1 is converted into It sets the control code to the delay interval generator 15, from the output of which a pulse is applied to the second block 16 of matches. The control pulse from the output of the second block 16 matches sets the trigger 12 in Ref. The battery state. Thus, the proposed magnetometer allows full automatic synchronization in a wide range of measured fields and a higher signal-to-noise ratio, which increases the accuracy of measurements. A proton magnetometer with synchronous polarization containing a series-connected sensor, a precession signal amplifier, a limiter and a frequency multiplier connected to the first input of a pulse counter, a command unit connected to the second input of a pulse counter, to the input of a frequency multiplier and the first input of the coincidence unit , the other two 5 inputs of which are connected to a frequency multiplier, a switch whose output is connected to the sensor input, and a trigger, one input of which is connected to the output of the coincidence unit, The output is connected to the switch input, characterized in that, in order to expand the measurement range and increase accuracy, it additionally introduces a second block of matches, a delay interval generator and an analog-to-digital converter whose input is connected to the 9 output of the precession signal amplifier, and the output is connected to the input of the Delay interval imager, the output of the Delay interval imager is connected to the first input of the second block of matches, the second input of which is connected to the command block, and the output of the second block matches connected to the second trigger input. Sources of information taken into account in examination 1 of the USSR Author's Certificate W 705989, cl. G 01 R 33/00, 1978.