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Positioning device and positioning method for magnetic field of circular coils

A coil magnetic field and positioning device technology, which is used in measurement devices, instruments, surveying and navigation, etc., can solve problems such as being susceptible to electromagnetic interference, indoor positioning non-line-of-sight, and building a fingerprint database.

Active Publication Date: 2015-12-09
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] The invention provides a circular coil magnetic field indoor positioning device and method to solve the non-line-of-sight problem of indoor positioning, and to solve the problem of using magnetic field positioning to build a fingerprint library and being susceptible to electromagnetic interference

Method used

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  • Positioning device and positioning method for magnetic field of circular coils
  • Positioning device and positioning method for magnetic field of circular coils
  • Positioning device and positioning method for magnetic field of circular coils

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Embodiment Construction

[0108] Specific embodiments of the present invention are given below and described in conjunction with the accompanying drawings.

[0109] figure 1 It is an overall block diagram of a circular coil magnetic field positioning device of the present invention. Data processing and control unit 100, D / A conversion circuit 101, drive circuit 102, protection circuit 103, circular coil 104, current detection circuit 105, filter amplifier circuit 106, A / D conversion circuit 107 are sequentially connected, wherein data processing and control The unit 100 is connected with the host computer 108, and the three-axis magnetometer 109 is also connected with the host computer 108;

[0110] The data processing and control unit 100 is mainly composed of DSP processor, SDRAM memory, FLASH memory, power supply and other parts. On the one hand, it is connected with the host computer 108, and the logic function and data processing function are initially set by the host computer 108. On the other ...

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Abstract

The invention discloses a positioning device and a positioning method for a magnetic field of circular coils. The positioning device comprises a data processing and controlling unit, a D / A (Digital / Analogue) conversion circuit, a driving circuit, a protection circuit, circular coils, a current detecting circuit, a filter amplifying circuit, an A / D (Analogue / Digital) conversion circuit and a tri-axis magnetometer. The positioning device is characterized in that firstly, the data processing and controlling unit controls the D / A conversion circuit to generate a driving signal according to a code division multiple access mode, provides the driving signal to the driving circuit, and drives the circular coils to generate a magnetic field with low frequency variation under the action of the protection circuit; meanwhile, the current detecting circuit transmits a current signal passing through the circuit coils, which is subjected to processing of the filter amplifying circuit and the A / D conversion circuit, to the data processing and controlling unit to form a current control feedback circuit; the tri-axis magnetometer transmits magnetic field information obtained by measuring to an upper computer for resolving the position and the posture, and displays the resolved results. The positioning device and the positioning method have the advantages that the circular coils are simple in structure and flexible in erection; utilization rate and redundancy of the magnetic field as well as anti-jamming capability are high; a resolving algorithm is not influenced by non-line of sight and does not need an offline fingerprint map.

Description

technical field [0001] The invention relates to the field of electromagnetism and indoor positioning, in particular to a circular coil magnetic field indoor positioning device and method. Background technique [0002] With the popularization of Global Positioning System (GPS) applications, people have become accustomed to using GPS outdoors to enjoy positioning and navigation services. growing demand. Therefore, indoor positioning technology has broad application prospects. The existing indoor positioning technologies mainly include infrared positioning technology, ultrasonic positioning technology, ultra-wideband positioning technology and wireless local area network technology. However, these methods are often affected by non-line-of-sight and multipath and cannot complete the target positioning work. In addition, although the positioning technology based on geomagnetic information is not limited by line-of-sight obstructions, a large amount of magnetic field informatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/20
CPCG01C21/206
Inventor 吴发林梁袁付勇赵剡
Owner BEIHANG UNIV
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