Magnetic field sensor device

Details Magnetic field sensor device Magnetic field sensor device

G - Physics

01

R

G01R 33/04 (2006.01)

Patent

CA 2112640

- 7 - SUMMARY Magnetic field sensor device Of the type based on flux-gate technology and second harmonic detection, that comprises a master oscillator (1) used as reference in a generator (2) to generate two signals of basic operating frequency and of double frequency respectively. The first one is amplified in a power booster (3) in order to energise the magnetising coil in the sensor head (4). The output signal from the sensor head is filtered in a bandpass filter (5), the output signal of which is detected in a phase detector (6) that is connected to a lowpass filter (7). It also incorporates a communications block (8) and a self- calibration block (9) for the transmission of data to a remote station, and for calibration and checking also from a remote station. (Figure 1)

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