Weak Magnetic Vector Measurement Method Based on Scalar Magnetometer

Abstract

The invention relates to a method for measuring a weak magnetic vector based on a scalar magnetometer. It is the same as the sensitivity; (2) Apply a background magnetic field in the direction of each coordinate axis, and the total magnetic field B is the superposition of the background magnetic field and the cardiac magnetic field, etc. The advantage of the invention is that the scalar magnetometer can measure the vector information of the weak magnetic field. This solution is different from existing features, and does not need to rotate the position of the probe, thus ensuring the accuracy of the measurement position. There is no need to increase the number of probes, which saves costs. The same sensitivity level can be achieved in the three measurement directions, which ensures the accuracy of the measurement vector. Therefore, in terms of practicality, it has a strong advantage.

Description

technical field [0001] The invention belongs to the field of precise magnetic field measurement, in particular to a weak magnetic vector measurement method based on a scalar magnetometer. Background technique [0002] The precise measurement of magnetic field has important applications in military reconnaissance, mineral exploration, biological magnetic field detection and other fields. Biomagnetic field measurement is becoming more and more important in medical and life science research. Taking the atomic magnetometer as an example, it can usually be divided into vector magnetometer and scalar magnetometer. A vector magnetometer can measure the magnetic field in a certain direction, while a scalar magnetometer can measure the magnitude of the total magnetic field. Vector magnetometers and scalar magnetometers usually have a sensitive axis, and the orientation of the sensitive axis and its structure and principle are related to light. Therefore, taking the vector biomagne...

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Problems solved by technology

The method of increasing the number of probes will increase the cost, and because the detection positions are different, the magnetic field vector at a certain point cannot be accurately restored

[0005] 3. There are also some atomic magnetometer schemes that use modulation to measure magnetic fields in two directions or three directions at the same time, but the modulation method will increase the complexity of the system, and the detection sensitivity in the three directions cannot be guaranteed to be the same. Usually there is one direction The detection sensitivity is weak

[0006] In summary, the vector magnetometer has corresponding difficulties in the measurement of the vector biomagnetic field

Scalar magnetometers cannot be used to measure vector magnetic fields

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