Indoor positioning system

Abstract

The invention discloses an indoor positioning system. The system comprises a sensor, a pedestrian dead reckoning module, an angular velocity module, a magnetic field matching module, a floor positioning module, a data transmission module and a background terminal; the sensors comprise a gyroscope, an acceleration sensor, a magnetic field sensor and a pressure sensor, wherein the gyroscope is an angular velocity sensor and is used for measuring an accurate angle, the acceleration sensor is used for measuring an acceleration, the magnetic field sensor is used for converting magnetic field information into an electric signal for measurement, and the pressure sensor is used for assisting in measuring the altitude of a pedestrian position; and the pedestrian dead reckoning module is used for calculating current position information of a pedestrian. The beneficial effects of the invention are that the method can obtain the indoor three-dimensional positioning information, achieves the statistics of the number of users at the same floor and the number of users at the same building, and achieves the position sharing among users.

Description

technical field [0001] The invention relates to a positioning system, in particular to an indoor positioning system, and belongs to the technical field of positioning. Background technique [0002] GPS is a kind of global satellite navigation system, which consists of three parts, namely space part, console and user equipment. User equipment refers to the signal receiver, mainly including the user terminal of the navigation system or other devices compatible with the satellite navigation system. Smart terminals, smart phones and other handheld devices can also be used as terminals to receive signals transmitted by satellites. GPS positioning will encounter a series of problems in indoor environments. It is relatively low, but it is too large for a small indoor environment. Secondly, the ability of the signal to penetrate buildings is not strong, and it will be seriously attenuated in the indoor environment, and the wireless signal of GPS is prone to multipath effects in indo...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the existing positioning system, which is mostly based on satellite and cellular network technology. Although the error is low, it is too large for a small indoor environment, and the signal penetration ability of buildings is not strong. It will be seriously attenuated in the indoor environment, and the wireless signal of GPS is prone to multipath effect in the indoor scene, because the walls of the building room, furniture and random people will make the wireless signal reach the receiving end through multiple paths. These environmental factors It will have a certain impact on the positioning accuracy and effect, does not have the function of indoor three-dimensional positioning, cannot count the number of users on each floor, and cannot share positions between users, so the indoor positioning system is proposed

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