An indoor positioning method based on indoor multi-dimensional geomagnetic features
An indoor positioning and multi-dimensional technology, applied in the field of positioning, can solve the problems of high error matching, low matching accuracy, and low cost, and achieve the effect of increasing accuracy, avoiding low positioning accuracy, and avoiding large amount of sequence matching calculations
Active Publication Date: 2022-04-12
CHINA UNIV OF MINING & TECH
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Problems solved by technology
[0004] In the prior art, there is a high mismatch phenomenon in a single geomagnetic fingerprint, resulting in low matching accuracy
For the indoor positioning scheme based on the geomagnetic field, due to the widespread existence of the geomagnetism and the low cost of the positioning method based on the geomagnetic field, there are still many improvements in the existing indoor positioning scheme based on the geomagnetic field
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[0031] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.
[0032] Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The occurrences of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is understood explicitly and implicitly by those skilled in the art that the embodiments described herein can be combined with other embodiment...
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The invention discloses an indoor positioning method based on indoor multi-dimensional geomagnetic features, comprising: constructing a multi-dimensional geomagnetic feature fingerprint library of an area to be positioned; starting a positioning operation, obtaining the variance of magnetic values in various places in the global range of the area to be positioned, and collecting multi-dimensional geomagnetic Measure data and acceleration data, match the collected multi-dimensional geomagnetic measurement data with the multi-dimensional geomagnetic feature fingerprint library to get the geomagnetic feature matching result, take the variance of the above local magnetic features as weight and normalize, then the initial position is determined by the local magnetic feature matching result The weighted average is obtained; then step detection is performed, if the position has not moved, continue to collect multi-dimensional geomagnetic measurement data for matching and repeat the above steps; if the position has moved, perform a series of calculation operations to obtain the final positioning result.
Description
technical field [0001] The invention relates to the field of positioning technology, in particular to an indoor positioning method based on indoor multi-dimensional geomagnetic features. Background technique [0002] At present, although the mainstream global satellite navigation system has been used in large-scale commercial applications, the positioning accuracy can meet most of the positioning needs in an outdoor open environment, but this type of signal cannot cover indoors, making it difficult to form a positioning. [0003] In order to provide indoor location services, wireless positioning technologies for indoor environments have been extensively studied, including pseudolites, Bluetooth, infrared, UWB, and so on. These positioning technologies can provide long-term positioning accuracy, but they need to deploy special signal transmitting and receiving devices, so the cost problem limits the application of wireless positioning technology in a large area. Geomagnetic ...
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IPC IPC(8): G01C21/20G01C21/08
CPCG01C21/206G01C21/08
Inventor 李增科王照远王成呈
Owner CHINA UNIV OF MINING & TECH