Space magnetic field and full-tensor gradient measurement system and method based on spatial correlation
A technology of spatial correlation and spatial magnetic field, applied in magnetic gradient measurement, magnetic field measurement using the principle of magnetic flux control, magnetic field measurement using electromagnetic devices, etc., can solve the problems of difficult construction and high cost, and achieve easy construction and low cost , the effect of good application prospects
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Embodiment 1
[0030] The invention relates to a spatial magnetic field measurement system based on spatial correlation, which includes a first fluxgate meter, a second fluxgate electric driver and a digital acquisition system. The distance between the first fluxgate meter and the second fluxgate meter is 1-10 meters, and they are parallel to each other. figure 1 is a schematic diagram of the measurement system. The computer in the picture can control the movement of the electric drive device and collect the readings of the two fluxgate meters at the same time. figure 2 It is a schematic diagram of the spatial correlation of the magnetic field in a certain direction. Curves 1 and 2 in the figure are respectively the fluctuation curves of the ambient magnetic field measured by the two fluxgate meters in a static state. It can be seen from the figure that the spatial correlation is very good.
[0031] image 3 It is a schematic diagram of the measurement principle of a survey line. Among t...
Embodiment 2
[0034] The method for using the measurement system of the present invention comprises the following steps:
[0035] (1) Put the second fluxgate meter at a distance of 1-10 meters from the first fluxgate meter, keep the two parallel to each other, then fix the first fluxgate meter, connect the second fluxgate meter with the motor The driver is connected and moves in a straight line at a uniform speed, and the outputs of the first fluxgate meter and the second fluxgate meter are collected synchronously by the digital acquisition system;
[0036] (2) Subtract the readings in three directions of the first fluxgate meter from their respective initial values to obtain the variation of the spatial magnetic field with time;
[0037] (3) Subtract the variation in the corresponding direction of the first fluxgate meter from each component of the second fluxgate meter to obtain the three components of the magnetic field at each point on the survey line;
[0038] (4) Make a two-dimensi...
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