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Indoor fast positioning method and system based on multi-source sensor

A positioning method and source sensor technology, applied in instrumentation, mapping and navigation, navigation through speed/acceleration measurement, etc., can solve the problems of loss of application value of positioning results, inability of location services, and lack of wireless network systems in public places. , to achieve the effect of avoiding error correction and eliminating drift error

Pending Publication Date: 2018-06-29
青岛美吉海洋地理信息技术有限公司 +1
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AI Technical Summary

Problems solved by technology

Due to the noise of each sensor signal, the positioning error will continue to accumulate and pass along with the integration, resulting in the loss of application value in a short period of time for the positioning result
[0007] In indoor, urban, canyon or other closed or sheltered environments, the availability and effectiveness of satellite signals cannot be guaranteed, and location services based on assisted global navigation satellite systems are powerless, and wireless network systems have not yet been deployed in some public places

Method used

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  • Indoor fast positioning method and system based on multi-source sensor
  • Indoor fast positioning method and system based on multi-source sensor
  • Indoor fast positioning method and system based on multi-source sensor

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Embodiment

[0051] Using the mobile phone as the carrier and based on its embedded multi-source sensors to achieve rapid indoor positioning, the basic process is as follows: figure 1 As shown, it specifically includes the following steps:

[0052] (a) Extract pedestrian motion feature information based on accelerometer signal

[0053] There is a certain degree of randomness in the way the mobile phone is carried and in the exercise mode. First of all, from the perspective of carrying a mobile phone, it may be in different positions such as the carrier’s hand, trouser pocket, jacket pocket, and satchel; from the perspective of the movement of the carrier, there are static, in-situ movement, and forward movement; the speed includes normal walking, slow walking, and fast walking. , jogging, fast running or even small steps; the status of the mobile phone will change during the exercise, such as taking the mobile phone out of the pocket and checking information or making a call.

[0054] Th...

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Abstract

The invention provides a fast positioning method and system based on a multi-source sensor. The fast positioning method comprises the following steps: extraction and classification of motion features:utilizing EMD (Empirical Mode Decomposition) and FFT (Fast Fourier Transformation) to carry out energy spectrum analysis, carrying out feature classification by a classic decision-making tree model-NBC, so as to construct a pedestrian motion feature based on an accelerometer signal; recognition of a real-time proceeding state: utilizing feature classification of fuzzy least square support vectormachines to exactly estimate motion modes of pedestrians; parameter model estimation of gaits: calculating the step frequency and the step length of the pedestrians according to time difference of thepeak and the trough of the signal and the spectrum energy change, and by combination with the height and the weight of the pedestrians, initially establishing a step-length estimation model of the pedestrians; course estimation: realizing reliability estimation of pedestrian courses on the basis of a heuristic type drifting cancellation method. The fast positioning method and system provided by the invention have the beneficial effects that a pedestrian motion direction is accurately reckoned, high-accuracy indoor fast positioning is realized, and beneficial reference is provided for reliability application of an intelligent navigation system.

Description

technical field [0001] The invention relates to the technical fields of geographic information systems and geodetic engineering, in particular to a high-precision indoor intelligent positioning and navigation technology based on multi-source sensors. Background technique [0002] With the development of information technology and the integration of human activities, location-based service information (Location Based Service, LBS) occupies an increasingly important position. The integration of human activities is also satisfied. For example, hotels can not only solve the problem of accommodation, but also complete meals, entertainment, making friends, work, meetings, and even travel. Some public places, such as airports, office buildings, warehouses, underground parking lots and even prisons and military training bases also require accurate positioning and navigation information. Accurate indoor positioning and navigation information can bring convenience to ordinary people ...

Claims

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Application Information

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IPC IPC(8): G01C21/00G01C21/16
CPCG01C21/005G01C21/165
Inventor 郭英高乐刘清华姬现磊郭伟王邦松
Owner 青岛美吉海洋地理信息技术有限公司
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