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Low-frequency noise suppression method based on rotational modulation for vectorized sensor
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DOI：10.1016/j.sna.2024.115323.png)
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Abstract
En 中文
Environmental noise and device 1/f noise will significantly degrade the accuracy of magnetic sensor detection. Most earth resource exploration magnetic and biomagnetic signals are predominantly in the low -frequency range, with weak output signals, and are highly susceptible to the influence of such noise. This paper proposed a method to suppress low -frequency noise for vectorial magnetic sensors with specific magnetic sensitivity directions. A relational equation was constructed for the rotation -modulated signals of vector magnetic sensors under noisy conditions. Taking the induction -type magnetic rod sensor as an example, the modulation system model under 1/f noise is constructed by finite element simulation, and the relational equations of the modulated signals under different rotational frequencies and various magnetic field amplitudes are verified. By employing both simulation and experimental approaches, the low -frequency signals received by the sensor were successfully modulated into high -frequency signals, and subsequently demodulated, which effectively suppressed the low -frequency noise in the magnetic sensor. The rotational modulation method for magnetic sensors proposed in this paper is crucial for vectorized magnetic sensors to improve the resolving power of low -frequency magnetic fields.
Keywords:
Low frequency
Vectorized magnetic sensors
Rotational modulation
Noise suppression
Journal
IF:
4.9
Papers:
1.5W
Citations:
3.3W
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