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Indoor location system based on Android platform MARG sensor

An indoor positioning and sensor technology, applied in the field of indoor positioning methods and systems based on the Android platform, can solve problems such as high cost and inconvenient wearing, and achieve the effects of overcoming the impact of positioning accuracy, saving system costs, and being easy to use

Inactive Publication Date: 2015-01-07
NANJING NUODAO ELECTRONICS TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Indoor positioning technology based on micro-inertial sensors is gradually developing. The existing positioning methods based on inertial sensors are mainly based on specific equipment, and the equipment is fixed at the ankle, which is inconvenient to wear and expensive.

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  • Indoor location system based on Android platform MARG sensor
  • Indoor location system based on Android platform MARG sensor
  • Indoor location system based on Android platform MARG sensor

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Embodiment Construction

[0013] The present invention will be further described below in conjunction with the accompanying drawings.

[0014] (1) This system is an indoor positioning system integrating hardware and software. It is based on the Android hardware platform, and the Android operating system is the core of the positioning software. figure 1 The system method structure is given.

[0015] (2) The indoor positioning system based on the Android platform is supported by the Android platform with a MARG sensor (generally refers to a mobile phone or a tablet computer). The data acquisition unit ① mainly consists of three accelerometers and three gyroscopes with sensitive axes perpendicular instrument and three magnetic sensors. Wherein, the directions of the X-axis, Y-axis and Z-axis of each sensor are the same. When pedestrians walk and locate, the Z axis is perpendicular to the ground plane, the X axis is perpendicular to the Z axis, the horizontal direction is to the left, and the Z axis is p...

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Abstract

The invention discloses an indoor location method and system based on an Android platform MARG sensor, belonging to the technical field of location and navigation. The MARG sensor comprises a three-axis magnetometer, a three-axis gyroscope and a three-axis accelerometer. The indoor location system mainly comprises a data acquisition unit, a data processing unit and a display unit. When in location, an Android platform is held in hand by a pedestrian and the location information is acquired through the data acquisition unit, the data processing unit and the display unit. The noise filtration is performed on sensor data by utilizing an EKF (extended Kalman filter) algorithm so as to improve the location precision. In places with weak GPS (global positioning system) signal or without GPS signal, high-precision location can be achieved by virtue of the system. The indoor location system is applicable to the Android platform with the MARG sensor, and is good in real-time property, high in portability, high in location precision and convenient to use, and additional equipment is not needed.

Description

technical field [0001] The present invention relates to an indoor positioning system, in particular to an indoor positioning method and system based on an Android platform. Background technique [0002] At present, positioning technologies mainly include satellite positioning, cellular network positioning and some other positioning technologies. Satellite positioning is mainly used for outdoor positioning and navigation. In indoor or places covered by buildings, the accuracy of satellite positioning decreases or even fails to locate. Cellular network positioning mainly adopts TDOA, AOA and other methods, which are affected by multipath and fading, and its positioning accuracy is low. [0003] Indoor positioning technologies include WLAN, Bluetooth, etc. Mainly based on fingerprint positioning, RSSI positioning and other methods. Using WLAN for indoor positioning requires strict control of the transmission power of WLAN nodes, and the nodes also need to be relocated. The i...

Claims

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Application Information

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IPC IPC(8): G01C21/18G06F19/00G06N3/02
CPCG01C21/165G01C21/206
Inventor 刘宇钱广史莉莉王仕亮黄河明江宏毅陈燕苹王伊冰
Owner NANJING NUODAO ELECTRONICS TECH CO LTD
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