A Simple Method for Measuring Orthogonality of Component Quadrature Coils in Vector Magnetometer

Abstract

The invention discloses a method for simply measuring an orthogonal angle of a component quadrature coil in a vector magnetic meter. The method comprises the steps that by installing a scalar magnetometer probe on a support inside a magnetic dip coil, after two high-stability constant-current sources are connected with the magnetic dip coil and a magnetic declination coil respectively, the high-stability constant-current sources are utilized for applying currents which are equal in size and same or opposite in direction on the magnetic dip coil and the magnetic declination coil, and then the currents which are equal in size and same or opposite in direction are applied on the magnetic dip coil and the magnetic declination coil simultaneously in sequence, resultant magnetic fields under various conditions are determined separately, and then the orthogonal angle of the component quadrature coil is worked out. In the process, precise mechanical axial alignment operation is not needed, the error brought by inconsistency of assembling is eliminated, the orthogonal angle of a two-dimensional or three-dimensional coil can be measured efficiently and accurately, and scientific research or production use is convenient.

Description

technical field [0001] The invention relates to a measurement method, in particular to a method for simply measuring the orthogonality of component quadrature coils in a vector magnetometer. Background technique [0002] The vector magnetometer is a relative recording instrument that continuously measures and records the time variation of the declination D and inclination I of the geomagnetic field and the total intensity F. Among them, the component quadrature coils in the vector magnetometer include mutually orthogonal magnetic declination coils and magnetic inclination coils. The component quadrature coils are used to provide a uniform magnetic field for the scalar magnetometer probe to ensure its normal operation. According to the bias principle, the Obtain the variation of the declination D and inclination I of the geomagnetic field. The bias magnetic field generated by the component quadrature coil needs to meet the requirements of the magnetic field uniformity in the...

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Problems solved by technology

[0004] Existing methods for measuring the orthogonality of the component quadrature coils mainly include: 1. Using a fluxgate theodolite to measure, but the size of the component quadrature coils is required to be large enough to meet the needs of human-operated instruments; 2. Magnetic vector projection method, The operation requires that the scalar magnetometer probe be placed in the uniform magnetic field generated by the magnetic field coil and make an axis parallel to the magnetic field direction of the measured axis. This operation takes a long time and has high requirements for equipment and operators.

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