A LED indoor 2D positioning method combined with accelerometer

A technology of accelerometer and positioning method, which is applied in the direction of navigation, navigation, and instruments through speed/acceleration measurement, which can solve the problems of inability to ensure the horizontal placement of the receiver, tilt or shake of the handheld device, and low positioning accuracy, and achieve high positioning Accuracy, accuracy stability, and the effect of improving accuracy

Inactive Publication Date: 2018-09-14
CHINA UNIV OF GEOSCIENCES (WUHAN)
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AI Technical Summary

Problems solved by technology

However, in the actual positioning and navigation process, the handheld device will tilt or shake at a certain angle, which cannot ensure that the receiver is always placed horizontally
In summary, these algorithms will lead to large positioning errors in practical applications, and the positioning errors can reach decimeter level, meter level or even ten meter level, and the positioning accuracy is low

Method used

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  • A LED indoor 2D positioning method combined with accelerometer
  • A LED indoor 2D positioning method combined with accelerometer
  • A LED indoor 2D positioning method combined with accelerometer

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Embodiment Construction

[0056] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments, and the content of the present invention is not limited to the following embodiments.

[0057] The present invention can use N LED lights to realize positioning. When N is 1 or 2, it can only be located within a certain range, and the positioning accuracy is low; when N is 3, the coordinate position of the user can be accurately calculated, but when a certain When a lamp fails, the positioning accuracy cannot be guaranteed; when N is 4, it can not only realize accurate positioning for the user, but also ensure normal positioning when the LED lamp fails, so N=4 is recommended, that is, the positioning unit is 4 LED lamps are distributed in a square, and the LED lamp array is expanded on all sides. The indoor lighting system is a palace grid unit topology network composed of more than one LED lamp array extended by 2 rows and 2 columns. The LED lamps locat...

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Abstract

The invention provides an LED (light emitting diode) indoor 2D (two-dimensional) positioning method by combining with an accelerometer. An LED lamp is used as a transmitter, and is used for sending an ID (identification) code with position information; movable equipment is used as a receiver; a rotation angle is considered into the positioning method, and the receiver with the accelerometer is used for receiving transmitting light of each LED lamp and obtaining received power; normal directions of the receiver at different rotation angles are obtained through the angle information of the accelerometer; a detailed calculation method of an incident angle is used, and the rotation angle of handheld equipment is finally quantified into the incident angle, so as to provide higher positioning accuracy, and increase the positioning accuracy from a decimeter or meter level of the prior art to a centimeter level; the used receiver can be a daily mobile phone, and because most of mobile phones have the accelerometers, related information of the accelerometer of the mobile phone is automatically used in the positioning process. The LED indoor 2D positioning method has the advantages that the use cost is lower, the matrix operation is used, the complexity in realizing of software is low, and the influence to the operation speed of the mobile phone is avoided.

Description

technical field [0001] The invention provides an LED indoor 2D positioning method combined with an accelerometer, belonging to the technical field of indoor positioning and navigation. Background technique [0002] Location-Based Service (LBS) is to determine the actual geographic location of mobile users through the cooperation of mobile terminals and wireless networks, so as to provide location-related information services that users need. It has become a must in people's daily life in today's society. an essential part. Global Satellite Positioning (GPS) is currently the most widely used positioning system, but satellite signals cannot penetrate buildings, and there are serious multipath and non-line-of-sight interferences in the indoor environment, making it difficult to achieve positioning indoors. In order to improve the accuracy of indoor positioning, people use infrared positioning, ultrasonic positioning, radio frequency identification (Radio Frequency Identificati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C21/16
CPCG01C21/165
Inventor 王瑾黎好栩
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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