| 摘要 |
<p>Fluxgate sensor consists of the ferromagnetic core (1) of arbitrary shape with either parallel or perpendicular direction of the excitation field. Ferromagnetic core (1) is either equipped with the excitation winding (2) connected to the excitation block (9) or the ferromagnetic core (1) is connected to the excitation block (9) directly. Around the ferromagnetic core (1) is concentrically and coaxially wound a gradient compensating/pick-up coil (4), which is connected with the first signal processing block (61) by controlled first phase shifter (7) interconnected with the excitation block (9). Its winding has the same diameter throughout the whole length and the number of coil turns per length unit decreases linearly from one end of the fluxgate sensor towards its center, where the winding direction turns, and from this center towards the other end of the fluxgate sensor the number of coil turns per length unit increases analogically. Gradient compensating/pick-up coil (4) is simultaneously connected with the output of the first U/I converter (63), which is connected to the output of the first inverting integrator (62), the input of which is connected with the output of the signal from the first signal processing block (61). The winding of the gradient compensating/pick-up coil (4) may be discretized into a setup of narrow, homogeneously wound sections (41) connected in series, with identical diameter and width, which are located with identical spacing around the ferromagnetic core (1).</p> |
