Method for determining interaxial angles of triaxial magnetic sensor based on axial surface angles
A technology of axial plane angle and inter-axis angle, which is applied in the field of determining the inter-axis angle of a three-axis magnetic sensor based on the axial plane angle, can solve the problems of calculation error, accuracy, and the inaccuracy of measurement results, and improve the calibration accuracy. , the effect of improving accuracy and reliability
Active Publication Date: 2012-07-11
北京航天河科技发展有限公司
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[0003] At present, there are some methods that can directly measure the interaxial angle between the three axes of the three-axis magnetic sensor, but due to the accuracy of the measurement method and the measurement system itself, there are also factors such as calculation errors, and the accuracy of the measurement results has been limited. Can not meet the needs of the increasing development of modern measurement technology
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[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0020] A method for determining the inter-axis angle of a three-axis magnetic sensor based on the shaft-surface angle. The inter-axis angle refers to the actual angle formed between each two axes of the three orthogonal measurement axes of the three-axis magnetic sensor. The three-axis magnetic sensor There are three inter-axis angles. First, measure the angle between each axis and the plane formed by the other two axes, that is, the axial-surface angle; the axial-surface angle is measured by projection method, that is, in the three-axis magnetic sensor On one of the axes, a known standard magnetic field is added. Since there is a certain angle between the axis and the plane formed by the other two axes, the data read from the three-axis magnetic sensor is smaller than the actual standard magnetic field added. , according to the ratio of these two magnetic fi...
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The invention discloses a method for determining interaxial angles of a triaxial magnetic sensor based on axial surface angles. The method comprises the following steps of: respectively measuring an included angle, namely the axial surface angle, between each axis and a plane formed by other two axes; respectively constructing a relation among each axial surface angle and the three interaxial angles by using a geometric theory according to the measured axial surface angles; and solving an equation set consisting of the relations between the axial surface angles and the three interaxial angles by using a computer program module, and thus obtaining the included angles among the three axes of the triaxial magnetic sensors, namely values of the interaxial angles. Compared with the conventional method for directly measuring the interaxial angles in the prior art, the method has the advantages that: the calibration precision of the values of the interaxial angles is improved, and the accuracy and the reliability for measuring orthogonal angles of the triaxial magnetic sensor are improved.
Description
technical field [0001] The invention relates to the technical field of magnetic sensors, in particular to a method for determining the interaxial angle of a three-axis magnetic sensor based on the shaft-surface angle. Background technique [0002] Three-axis magnetic sensors are widely used in various fields such as aerospace, aviation, ships, and weaponry. They are used to measure the magnetic field strength in three directions. The three measurement axes form an angle of 90 degrees to each other to form an orthogonal three-dimensional measurement system. . However, due to reasons such as processing and technology, it is impossible for the three measurement axes of the three-axis magnetic sensor to be absolutely orthogonal, because the non-orthogonality of the three measurement axes will cause a large error in the vector measurement of the magnetic field strength. The solution is that if the angle value between the three axes of the three-axis magnetic sensor can be known,...
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Inventor 王慧赵晓光张明志宋博
Owner 北京航天河科技发展有限公司