An indoor pedestrian positioning system based on magnetic field characteristics and accelerometer information
A positioning system and acceleration technology, applied in the field of indoor pedestrian positioning system, can solve problems such as loss, affecting positioning effect, adverse market promotion, etc., to achieve the effect of increasing accuracy, low power consumption, and small number of sensors
Active Publication Date: 2021-11-26
SHANGHAI JIAOTONG UNIV
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Problems solved by technology
[0004] (1) In the existing indoor positioning scheme, the signal generated by the equipment is used for indoor positioning, and signal transmitting equipment needs to be installed. These equipment will stop working due to power supply or some other external factors, which will affect the Positioning effect, resulting in unnecessary losses;
[0005] (2) In the existing indoor positioning scheme, the energy consumption of the electronic equipment required to obtain the positioning signal is relatively high, and the power consumption of signal receivers such as WiFi signal receivers and GPS signal receivers is also high, and the electronic equipment cannot provide long-term time location services;
[0006] (3) Existing indoor positioning solutions need to install a large amount of equipment indoors, resulting in an increase in the cost of realizing indoor positioning services, which is not conducive to market promotion
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[0040] The technical solutions proposed by the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Advantages and features of the present invention will be apparent from the following description and claims. It should be noted that all the drawings are in very simplified form and use imprecise ratios, which are only used for the purpose of conveniently and clearly assisting in describing the embodiments of the present invention.
[0041] The present invention utilizes the characteristics of the geomagnetic field, obtains magnetic field information and acceleration information through the magnetic field and acceleration sensor data acquisition module, and uses the acceleration sensor step counting module, magnetic field projection module, inertial sensor and magnetic field fusion module to obtain the magnetic field strength sequence when pedestrians are moving , the geomagnetic matching positioning ...
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The present invention relates to the technical field of indoor positioning and navigation, specifically an indoor pedestrian positioning system based on magnetic field characteristics and acceleration information step counting, including a magnetic field and acceleration sensor data acquisition module, an acceleration sensor step counting module, a magnetic field projection module, Magnetic field database training module, inertial sensor and magnetic field fusion module, geomagnetic matching positioning module and output module. The present invention obtains magnetic field information and acceleration information through the magnetic field and acceleration sensor data acquisition module, uses the acceleration sensor step counting module, the magnetic field projection module, the inertial sensor and the magnetic field fusion module to obtain the magnetic field intensity sequence when pedestrians are moving, and the geomagnetic matching positioning module and The magnetic field data in the magnetic field database training module is matched to obtain the positioning result, so that the positioning can be realized without installing additional signal transmitting equipment.
Description
technical field [0001] The invention relates to the technical field of indoor positioning and navigation, in particular to an indoor pedestrian positioning system based on magnetic field characteristics and accelerometer information for step counting. Background technique [0002] With the rapid development of global navigation satellite systems, location-based services are more and more widely used in various outdoor environments. In recent years, indoor positioning has been widely demanded in fields such as emergency rescue, medical care, and business information guidance. However, because the satellite signals of the global navigation satellite system are severely attenuated and even easily lost indoors, indoor positioning has undoubtedly become a new technology for positioning and navigation. important research directions in the field. [0003] According to various existing studies in the field of pedestrian indoor positioning, it is mainly to use signals generated by i...
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IPC IPC(8): G01C21/16G01C21/08G01C21/20
CPCG01C21/08G01C21/165G01C21/206
Inventor 钱久超慕翔刘佩林徐昌庆王兆圣洪燕
Owner SHANGHAI JIAOTONG UNIV