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The content of this paper relates to the field of monitoring the parameters of a magnetic field (MF) meter with a MF a fluxgate sensor. The article directly discusses the control method for the amplitude frequency response (AFR) of the second harmonic filter of an EMF fluxgate meter. The purpose of the work is to minimize the workplace (WP) equipment for magnetometer monitoring. We suggest an AFR monitoring method based on three readings. As an input signal source, while monitoring an AFR filter, we suggest the use of a WP fluxgate meter. The fluxgate meter is installed in a magnetic screen. The method consists in generating the filter input signal using the magnetometer. The essence of the suggested method is to analyze the AFR symmetry. As the base filter, we use a second-order Butterworth filter with a narrowband symmetric AFR. The effect of the electrical element filter ratings is systematized in the form of a correspondence table: an electric element – an AFR parameter. We present the AFR sufficiency control analysis in terms of its symmetry. The AFR monitoring, in terms of its symmetry, has been supplemented with the Kр(f0) monitoring using the personal computer. We demonstrate the peculiarities of using a fluxgate meter as an input signal source. We derived the ratio of the magnetometer electronic part parameters that affect the accuracy (discreteness) of the filter’s input signal generation. We present an algorithm with a description of the magnetometer operation in the AFR monitoring mode.
The content of this paper relates to the field of monitoring the parameters of a magnetic field (MF) meter with a MF a fluxgate sensor. The article directly discusses the control method for the amplitude frequency response (AFR) of the second harmonic filter of an EMF fluxgate meter. The purpose of the work is to minimize the workplace (WP) equipment for magnetometer monitoring. We suggest an AFR monitoring method based on three readings. As an input signal source, while monitoring an AFR filter, we suggest the use of a WP fluxgate meter. The fluxgate meter is installed in a magnetic screen. The method consists in generating the filter input signal using the magnetometer. The essence of the suggested method is to analyze the AFR symmetry. As the base filter, we use a second-order Butterworth filter with a narrowband symmetric AFR. The effect of the electrical element filter ratings is systematized in the form of a correspondence table: an electric element – an AFR parameter. We present the AFR sufficiency control analysis in terms of its symmetry. The AFR monitoring, in terms of its symmetry, has been supplemented with the Kр(f0) monitoring using the personal computer. We demonstrate the peculiarities of using a fluxgate meter as an input signal source. We derived the ratio of the magnetometer electronic part parameters that affect the accuracy (discreteness) of the filter’s input signal generation. We present an algorithm with a description of the magnetometer operation in the AFR monitoring mode.
We have discussed a diagnostics method to assess the admissibility of using a Foerster probe as part of a magnetometer. The diagnostics is based on the compatibility analysis of the magnetic field (MF) induction (B) conversion by a Foerster probe with the parameters of a specific series of Foerster probe output signal converters (OSC). As a reference source of MF, we have used the Earth’s MF. The analysis uses a Foerster probe magnetometer designed according to the MF compensation method in the Foerster probe core piece. The subject of our analysis is the value of the OSC output signal under normal climatic conditions (NCCs), when the Foerster probe is exposed to extreme temperatures. Following the diagnostics, we have made a YES/NO decision on the admissibility of using a Foerster probe with OSCs of this series. As OSC parameters, that limit the use of a Foerster probe, we have adopted the values of the minimum and maximum codes of a digital-to-analog OSC converter, as allowed by relevant documents. The first two diagnostics stages are carried out with inductions of ±Bcon under NCCs, taking into account the Foerster probe zero offset. In this case, Bcon ˂ Вmax, where Вmax is the Foerster probe’s working range. Two subsequent diagnostics stages are carried out using the calculated and experimental characteristics, taking into account the Foerster probe zero offset under effect of extreme temperatures of different signs. We have demonstrated the temperature error specifics and presented the diagnostics algorithm.
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