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Thee-dimensional magnetic-induction magnetic compass

A magnetic compass and three-dimensional technology, applied in the field of magnetic compass, can solve the problems of lack of magnetic compass sensor technology

Active Publication Date: 2015-12-30
NO 49 INST CHINESE ELECTRONICS SCI & TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention is to solve the problem of lack of magnetic compass sensor technology based on the magnetic induction effect principle in the prior art, and now provides a three-dimensional magnetic induction magnetic compass

Method used

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  • Thee-dimensional magnetic-induction magnetic compass

Examples

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specific Embodiment approach 1

[0045] Specific implementation mode one: refer to figure 1 Describe this embodiment in detail, a kind of three-dimensional magnetic induction type magnetic compass described in this embodiment, it comprises: excitation circuit, three-dimensional magnetic induction sensor, three-dimensional acceleration sensor, three-dimensional gyroscope sensor, AD chip, FPGA and DSP;

[0046] FPGA includes: frequency meter module, AD control module and SPI bus module;

[0047] DSP includes: circular rotation extremum correction unit, Kalman filter fusion inclination unit, magnetic compass inclination compensation and 485 bus output unit;

[0048] The pulse signal output end of the excitation circuit is connected to the pulse signal input end of the three-dimensional magnetic induction sensor, the excitation direction control signal output end of the FPGA is connected to the excitation direction control signal input end of the excitation circuit, and the time difference signal output end of th...

specific Embodiment approach 2

[0058] Specific implementation mode two: refer to figure 2 Describe this embodiment in detail. This embodiment is a further description of the three-dimensional magnetic induction magnetic compass described in the first embodiment. In this embodiment, the three-dimensional magnetic sensor includes: a Z-direction magnetic core 1, a Z-direction coil 2. X-direction coil 3, X-direction magnetic core 4, Y-direction magnetic core 5, Y-direction coil 6 and plastic base 7;

[0059] The plastic base 7 is a cube, and one end of the Z-direction magnetic core 1, one end of the X-direction magnetic core 4 and one end of the Y-direction magnetic core 5 are respectively fixed on three surfaces of the plastic base 7, and the three sides of the plastic base 7 Two planes are perpendicular to each other and adjacent to each other. The Z-direction coil 2 , the X-direction coil 3 and the Y-direction coil 6 are respectively wound on the Z-direction magnetic core 1 , the X-direction magnetic core 4...

specific Embodiment approach 3

[0065] Specific embodiment three: This embodiment is a further description of a three-dimensional magnetic induction magnetic compass described in specific embodiment two. In this embodiment, the Z-direction coil 2, the X-direction coil 3 and the Y-direction coil 6 are all 0.01mm enameled wire coil.

[0066] In this embodiment, the magnetic compass adopts Permalloy and enameled wire to make special inductors, and the three-dimensional structure adopts mold and integrated structure, which reduces the orthogonality error caused by assembly.

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Abstract

The invention discloses a three-dimensional magnetic-induction magnetic compass and belongs to the technical field of magnetic navigation and positioning. The purpose is to solve the problem that at home, no sensor is arranged on a magnetic compass based on a magnetic induction effect principle. Based on a magnetic induction effect, a modern digital signal processing technology is utilized, an FPGA and DSP modularized design method is adopted, and signal extraction of a sensor is achieved. Pulse signal excitation is adopted for replacing a traditional square wave excitation mode, and power consumption of a detection circuit of the magnetic sensor can be effectively lowered. An integrated three-dimensional magnetic core structure is adopted for the three-dimensional magnetic induction sensor, the orthogonal deviation of the sensor is effectively reduced, an FPGA is utilized for synchronously collecting a three-dimensional magnetic signal at high speed, and the detection precision of the course angle of the magnetic compass is improved. According to excitation of the magnetic induction sensor, the pulse excitation method is adopted for lowering the power consumption of the device, a DSP is adopted for the magnetic compass to perform intelligent magnetic compensation and attitude self-compensation, and the magnetic compass has good adaptive capacity to the environment.

Description

technical field [0001] The invention belongs to the technical fields of magnetic navigation and positioning, and in particular relates to magnetic compass technology. Background technique [0002] The intelligent magnetic compass sensor is an important navigation tool that uses the earth's magnetic field to measure the direction. It can provide the heading and attitude of the maneuvering target in real time. It is widely used in aviation, navigation, vehicle positioning, deep-sea detection and other fields. Through the development of modern science and technology, people integrate magnetic compass sensors with electronic circuits and microcontrollers to accurately give geographic heading angles in digital quantities. Since this magnetic compass has no moving parts, it has good impact resistance and Simple structure, small size, light weight, low cost, intelligent automatic calibration, etc. [0003] The strength of the earth's magnetic field is about 0.5 to 0.6 gauss, and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C17/28
CPCG01C17/28
Inventor 孙立凯付士民宫占江黄辉齐娜桂永雷张鹏李金平
Owner NO 49 INST CHINESE ELECTRONICS SCI & TECH GRP
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