Digital three-axis fluxgate sensor based on cobalt-based amorphous effect

Abstract

The invention discloses a digital three-axis fluxgate sensor based on a cobalt-based amorphous effect. The digital three-axis fluxgate sensor comprises a three-channel fluxgate probe, an excitation power supply module, a signal measurement module and a feedback module, wherein the three-channel fluxgate probe is formed by winding an excitation coil and an induction coil on a cobalt-based amorphous wire, the excitation coil is an input end of the three-channel fluxgate probe, and the induction coil is an output end of the three-channel fluxgate probe; the excitation power supply module is connected with an input end of the three-channel fluxgate probe module, an output end of the three-channel fluxgate probe module is connected with an input end of the signal measurement module, and an output end of the signal measurement module is connected with an input end of the feedback module. According to the digital three-axis fluxgate sensor, high-precision, high-stability and high-resolution magnetic field measurement can be realized.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to a digital three-axis fluxgate sensor based on the cobalt-based amorphous effect. Background technique [0002] With the successful development of many new magnetic sensors, some traditional magnetic sensors have been gradually eliminated, while the research on fluxgate sensors is relatively early and has been developed and applied to practical engineering applications. Fluxgate sensor is a vector magnetic field measurement device based on the nonlinear characteristics of soft magnetic materials. It has the advantages of high sensitivity, good reliability, simple structure, and low power consumption. It is currently widely used in the field of low-frequency weak magnetic field measurement: geological exploration , navigation, space technology, etc. With the development of the times, the original fluxgate sensor is far from being able to meet the demand. People's measurement of th...

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Problems solved by technology

In terms of the probe design of the fluxgate sensor, the optimization of the probe structure, the selection of the magnetic core material and the parameter design will have a direct impact on the performance and miniaturization of the fluxgate sensor, and the development of the magnetic core material is restricted by various aspects. , resulting in little breakthrough in the development of fluxgate sensors in China

It is difficult for analog fluxgate sensors to make breakthroughs in improving resolution and reducing power consumption due to the influence of temperature drift and zero drift generated by analog circuits; at the same time, because the magnetic field is a vector field, single-axis fluxgates cannot meet the actual requirements. The requirements of engineering applications generally require the use of three-axis fluxgate sensors to measure the complete magnetic field signal, but in actual production, due to external factors such as technology, the three axes of the three-axis fluxgate sensor cannot be completely correct. In addition, the performance parameters cannot be completely symmetrical. In addition, the design of the feedback coil of the three-axis fluxgate sensor also directly affects the uniformity of the feedback magnetic field.

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