Steering difference correction method for a three-axis magnetic sensor
A technology of magnetic sensor and correction method, which is applied to instruments, measuring devices, measuring electrical variables, etc., can solve the problems of unsatisfactory magnetic sensor effect, etc., and achieve the effect of restraining steering difference, restraining steering difference and improving accuracy
Inactive Publication Date: 2019-12-17
HANGZHOU DIANZI UNIV
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But it turns out that it doesn't work well for different magnetic sensors
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[0052] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.
[0053] On the contrary, the present invention covers any alternatives, modifications, equivalent methods and schemes defined by the claims in the spirit and scope of the present invention. Further, in order to enable the public to have a better understanding of the present invention, in the following detailed description of the present invention, some specific details are described in detail. Those skilled in the art can fully understand the present invention without the description of these details.
[0054] See figure 1 , Is a flow chart of steps of a method for correcting steering differen...
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The invention discloses a steering difference correction method for a three-axis magnetic sensor. The method comprises the following steps: S10, selecting an open region without a magnetic substance at the periphery, rotating a magnetic sensor at a fixed point, and collecting three-axis magnetic field values Hx, Hy and Hz obtained by the magnetic sensor; S20, setting X', Y' and Z' axes as actual coordinate axes of the magnetic sensor, setting X, Y and Z axes as standard coordinate axes, and constructing a measurement output model of a geomagnetic field vector; S30, constructing a neural network identification system, and updating error parameters by adopting an iteration principle so as to obtain estimated values of the error parameters; and S40, calculating magnetic sensor data after compensation by utilizing the error parameters. The method is wide in applicability, does not require a huge amount of data, is higher in parameter estimation precision, has a better steering difference reduction effect, and improves the accuracy of the measured magnetic field value.
Description
Technical field [0001] The invention belongs to the field of electronic instrument measurement calibration and correction, and relates to a steering error correction method of a three-axis magnetic sensor. Background technique [0002] Magnetic field detection is an essential link in various scientific research and production activities related to magnetism. The accuracy of magnetic anomaly survey is very important. Among them, the three-axis magnetic sensor is often used as a tool to measure the three-component value of the magnetic field. However, because the processing technology is different, the level of the installation technology is also uneven, which will cause the three axes of the magnetic sensor to not be strictly orthogonal, and the sensitivity of the three axes will not be exactly the same, and there may be zero drift. And so on, it will make the measured magnetic field modulus and the actual amount of the sensor in the same position and different forms have a large...
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IPC IPC(8): G01R35/00
CPCG01R35/005
Inventor 章雪挺李崇贝何欢黄浩楠廖章锦徐航
Owner HANGZHOU DIANZI UNIV