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LED indoor positioning navigation method and positioning navigation system

A navigation method and indoor positioning technology, which is applied in navigation, surveying and mapping and navigation, navigation calculation tools, etc., can solve problems affecting positioning accuracy, large background noise, crosstalk between information transmission codes, etc., and achieve high channel utilization.

Active Publication Date: 2016-08-17
CHINA UNIV OF GEOSCIENCES (WUHAN)
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Problems solved by technology

[0011] However, due to the complexity of the indoor positioning environment, the limitations of indoor wireless positioning signals and positioning sensors, the existing indoor positioning and navigation technologies based on LED lighting have a series of problems such as information transmission intersymbol crosstalk and large background noise. Seriously affect the positioning accuracy

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  • LED indoor positioning navigation method and positioning navigation system
  • LED indoor positioning navigation method and positioning navigation system
  • LED indoor positioning navigation method and positioning navigation system

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Embodiment Construction

[0049] 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.

[0050] The LED indoor positioning and navigation method provided by the present invention receives, judges, processes the received data frame information through the receiving system, and performs positioning. It mainly adopts the idea of ​​multi-power detection based on distance. The transmission of the positioning data frame) is sent to the receiving end in the form of time division, and the receiving end (including a simple CPU to process the received data frame and obtain its coordinates by the corresponding algorithm) converts the decimal (x, y) coordinate data respectively Express it in binary, re-encode it into a frame, send it to the corresponding mobile phone client and display it on the APP map. The specific steps are as follows:

[0051] (1) Divide each LE...

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Abstract

The invention provides an LED (Light Emitting Diode) indoor positioning navigation method and a positioning navigation system. An LED lamp serves as an emitting terminal; an emitting terminal driving device is used for controlling the strength of current so as to cause the change of brightness of the light and transfer the physical position data; the data frame with clear hierarchy of code element information is designed; zero bit filling is introduced into the sending and receiving of the data frame, so as to realize the transparent transmission and distinguish the frame header, the verifying code of the physical position information and the frame tail; the frame header has a specific coding sequence and can be detected, so that the validity of the data frame can be judged; the frame length of data frame can be analyzed; the invalid data frame can be timely detected and abandoned; different sizes of LED lamp sets with grid unit topology network structures can be designed according to different illuminating areas; only one of the LED lamps of a positioning unit is used for emitting the data frame at each time slot, and meanwhile, the other LED lamps all emit equidistant full zero data frames; the inter-symbol interference and the background noise are extremely reduced; the safety and reliability of the data frame are ensured.

Description

technical field [0001] The invention provides an LED indoor positioning and navigation method and a positioning and navigation system, which belong to the technical field of indoor positioning and navigation. Background technique [0002] With the continuous development of wireless technology, the role of location information services is becoming more and more significant. At present, the widely used global positioning GPS system is used in various traffic navigation, engineering survey, rescue operations, aviation remote sensing and other fields. However, the GPS system has limitations, and it requires a line-of-sight distance between the positioning target and the orbiting satellites. Therefore, when it is indoors or in a building, the signal cannot be transmitted directly, and the positioning is inaccurate or even invalid. Nowadays, there are many giant buildings, and it is easy to get lost in shopping malls, hospitals, airports, etc., and indoor positioning systems hav...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/20
CPCG01C21/206
Inventor 王瑾周海莹张晓锋吴让仲
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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