High-precision trajectory recovery method, system and electronic equipment

Abstract

The present invention provides a high-precision trajectory recovery method and system. The method is applied to a high-precision trajectory recovery system. The system includes a terminal device, a terminal server, and the terminal device includes a camera collector and a wifi hotspot collector. The method includes the following steps: Obtain the location information of the target user collected by the camera collector, wifi hotspot collector, terminal server, and / or base station at the current point in time; for the camera collector, wifi hotspot collector, terminal server, and / or The location information of the target user collected by the base station is fused to obtain the fused location information of the target user at the current time point; according to the fused location information of the target user at all time points, the real trajectory of the target user is calculated. The present invention realizes high-precision trajectory restoration of the perceived target user without the participation of the target user.

Description

technical field [0001] The invention relates to the technical field of terminal positioning, in particular to a high-precision trajectory recovery method, system and electronic equipment. Background technique [0002] The location information of mobile terminals is an important part of social informatization, and plays a very important role in building a public information security network. For example, the 2020 novel coronavirus is highly contagious, urban prevention and control work needs to check the behavior trajectories of some confirmed patients and suspected patients, and the status of floating population still needs to be checked during the resumption of work and school. If it is possible to directly obtain the continuous trajectory of a specific user in a non-invasive way through the electronic equipment and informatization means arranged in the city without reading and uploading information on the user terminal, this will be extremely beneficial to the entire epide...

AI Technical Summary

Problems solved by technology

The base station analysis method can provide wide-area location awareness, but the location accuracy is too poor. Base station positioning can only provide a positioning accuracy of several hundred meters, and the obtained location ambiguity is too large. For example, various applications such as epidemic prevention and control require meter-level positioning accuracy. Obtaining possible contact groups, the base station positioning method is obviously difficult to meet such needs

[0007] The limitations of the camera analysis method are mainly in two aspects. The first is insufficient coverage. Some urban areas lack sufficient coverage, only discontinuous user location points are obtained, and the user's continuous movement trajectory is lacking.

The second is insufficient location accuracy. If the distance between the camera and the user to be identified is too far, image analysis technology can only provide coarse-grained location estimation.

[0008] The WiFi hotspot method also has the problem of coverage, and there are almost no hotspot devices in some areas (such as open urban roads, expressways, etc.)

Moreover, the position accuracy of this method is not enough, so because the wireless signal RSS is greatly affected by the environment, there may be problems of multipath and non-line-of-sight reception, resulting in a very complicated nonlinear relationship between the wireless signal RSS and distance, which is difficult Get accurate user location directly

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