SU1758613A1 - Device for measuring pulsed magnetic - Google Patents

Abstract

The invention relates to methods of magnetic measurements using ferro-resonance devices and can be used in the composition of spectrometers of ferromagnetic, nuclear, magnetic and other resonances, for which you need a magnetic field of strength 10 -108E. The purpose of the invention is to improve the accuracy and speed of measurements in a given range of magnetic field strengths. The device contains a solenoid 1, a controlled solenoid power supply source 2, an RF generator 3, 4.5 harmonics generators with ferroresonant sensors 6, 7i one of which is in the working zone of the solenoid, and the second is outside it, microwave detectors 8, 9 and block 10 registration and display. The proposed set of features ensures the production of 20–30 information CHI-lines for a single measurement cycle, which improves the likelihood estimate of the measured magnetic field by at least 5 times as compared with the prototype: - a power field and increases the measurement performance by an order of magnitude, 3 sludge. (L

Description

The invention relates to a technique of magnetic measurements using ferroresonant devices and can be used in the composition of ferromagnetic, nuclear magnetic and other resonances spectrometers, which are required for obtaining a magnetic field of 10b - 108 e.

The purpose of the invention is to improve the accuracy and speed of measurements in a given range of magnetic field strengths.

FIG. 1 is a functional diagram of a device that does not contain a solenoid 1 controlled by

solenoid power supply 2, RF generator 3, 4.5 harmonics generators with ferroresonance sensors 6, 7, microwave detectors 8, 9, display registration unit 10.

Fig. 2 shows a view of the measured magnetic field (a) and the output signals of harmonic generators associated with it; Fig. 3 is a solenoid circuit.

The device works as follows.

The device is first calibrated. In this case, the signal from the RF generator 3 is fed to two oscillators 4 and 5 harmonics. The main

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generator b of harmonics ferroresonance sensor 7 is outside the working zone of solenoid 1. At the auxiliary generator of 5 harmonics, the ferro-resonance sensor 6 is located in the barrel zone of the solenoid, into which the sample under study is then placed. a weaker field than the generator of 5 harmonics, and a signal at its output when the source 2 is discharged through solenoid 1, i.e. with a pulsed magnetic field (Fig. 2, a), will look like that shown in Fig. 2.6, and at the output of the harmonic generator 5 a signal as in Fig. 2, c. Then the signals from the harmonic generator k come through detector 8 At the first input of the registration and display unit 10, and from the 5-harmonic generator through the second microwave detector 9 to the other input of the block 10. The third input of the block 10 receives the signal of the RF generator 3 In block 10, the signal processing and determination of D c c4 - c5, where L s is the difference in time of obtaining the first harmonic of the frequency of the RF generator after the generators k and 5 harmonics.

By the difference At and the functional dependence uf F (ht) in block 10, fif is determined and entered into the memory block, where it is stored. The written signal of the frequency difference uf, at the operator's command, enters the RF generator to correct its frequency. In this case, the frequency of the RF generator decreases to Af, and this change is not taken into account in the subsequent mathematical processing of the spectrum, i.e. A spectrum of the type 2, g is assumed, assuming that the frequency remains unchanged on A f,

In the measurement mode, the device operates as follows.

The RF generator 3 signal enters the k harmonic generator and then the microwave detector 8 goes to the first input of block 10, to another input of which a signal comes from the RF generator to determine the number of harmonics. When the operator commands the power source 2 of the solenoid, it is connected to the solenoid and discharged by the storage elements, during which a magnetic field pulse is generated. This impulse will rebuild the fer-t

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resonance sensor generator harmonics and will get sig

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The wares presented in figure 2, g. In block 10, when determining the frequency of the corresponding nth harmonic, the previously obtained correction uf n is not added, as a result of which the instantaneous value of the magnetic field strength in the working zone is determined. In this case, the working zone of the solenoid can be occupied by the sample under study. In this case, the signal from the measuring apparatus from the sample under study can be, as in the calibration mode, entered into block 10 and, after determining its position relative to the magnetic field, is displayed on the indicator.

The technical and economic effect of the proposed device consists in a significant increase in the performance of the device and an increase in the accuracy of determining the magnitude of the magnetic field at which the signal from the sample under study,

Claims (1)

Invention Formula A device for measuring a pulsed magnetic field containing a series-connected controlled power source and a solenoid, the first and second ferroresonance sensors installed respectively in the working zone of the solenoid and outside it, a high-frequency generator, the first and second microwave detectors, and the recording and display unit, The first and second inputs of which are connected to the corresponding outputs of microwave detectors, characterized in that, in order to increase the accuracy and speed of measurements in a given interval of voltages m gnitnogo floor, it entered the first and second harmonic generators, first inputs of which are connected Correspondingly - venno to first and second outputs a high-frequency generator whose input is connected to the first output of the registration and indication unit, the third input of which is connected to the third output of the high-frequency generator, while the ferroresonant sensors are connected respectively to the second inputs of harmonic generators, the outputs of which are connected respectively to the inputs of the microwave detectors. FIG. 3