A bamboo-shaped structure low-power fluxgate sensor

Abstract

The invention discloses a bamboo-shaped structure low-power fluxgate sensor, which adopts a soft magnetic core with a bamboo-shaped cross-sectional area structure, uses a printed circuit board to make a skeleton, and an excitation coil is wound on the corresponding large section of the bamboo-shaped iron core. Outside the frame, the induction coil is wound outside the frame corresponding to the small section of the bamboo-shaped iron core, the excitation coil and the induction coil are alternately wound in segments, and are led out through the corresponding pads on the frame. The iron core structure of the low-power fluxgate sensor reduces the power consumption of the fluxgate, and the opening structure of the bamboo-shaped iron core improves the winding efficiency of the excitation coil and the induction coil and reduces the production cost; the excitation coil and the induction coil Separate winding simplifies the winding process and helps reduce the size of the fluxgate.

Description

technical field [0001] The invention relates to a magnetic fluxgate sensor, in particular to a low-power consumption magnetic fluxgate sensor with a bamboo-shaped structure. Background technique [0002] The fluxgate sensor (hereinafter referred to as the fluxgate) is a weak magnetic measurement sensor with good comprehensive performance. It has the characteristics of high resolution, large measurement range, good temperature stability and small residual magnetic error. High consumption and high manufacturing cost. [0003] refer to figure 1 , the document "US Patent No. US 6972563" discloses a fluxgate sensor. The excitation component of the fluxgate is composed of an iron core 1 and an excitation coil 4. The iron core 1 is made of a circular high-permeability magnetic material. The excitation coil 4 is evenly wound on the iron core 1, and the induction coil 5 is evenly wound in the center. Outside the skeleton of the square cavity, the excitation component is assembled ...

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Problems solved by technology

[0004] The fluxgate sensor described in the literature adopts a circular iron core structure, the fluxgate consumes a lot of power, and the manufacturing cost is relatively high; the winding of the excitation coil needs to pass through the center of the iron core, compared with the linear iron core. The situation is not easy to wind; the excitation part needs to measure the signal of the induction coil to determine the installation position during assembly, and the operation process is inefficient; the fixing of the excitation part during packaging is also time-consuming; the structure of the excitation part inside the cavity is not conducive to the fluxgate miniaturization

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