Mine underground positioning system and positioning method based on specific optical frequency

A positioning system and specific light technology, applied in beacon systems, measuring devices, instruments, etc. using electromagnetic waves, can solve the problems of difficult large-scale promotion and complex design algorithms, and improve user experience and human-computer interaction. Flexible, low power consumption

Active Publication Date: 2019-10-08
NANJING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some products based on visible light positioning systems are gradually being put into commercial use, but the design algorithms are relatively complicated and difficult to promote on a large scale

Method used

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  • Mine underground positioning system and positioning method based on specific optical frequency
  • Mine underground positioning system and positioning method based on specific optical frequency
  • Mine underground positioning system and positioning method based on specific optical frequency

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1, such as figure 1 As shown, a mine positioning system based on a specific optical frequency of the present invention includes an LED light source module, a database, a mobile terminal, a server, a control module and an LED driver module;

[0035] The LED light source module is used to emit LED light source;

[0036] In an embodiment, the LED light source module adopts a 24V DC LED light source and is connected to the LED driver module.

[0037] The database is used to store the LED light source information of the LED light source module;

[0038] The mobile terminal includes a camera and an inertial navigation system, the camera is used to collect LED light source images and upload them to the server at the same time, and the inertial navigation system is used to realize the user's motion tracking and real-time navigation;

[0039] In an embodiment, the mobile terminal may be a mobile phone, and the inertial navigation system establishes a navigation coordin...

Embodiment 2

[0045] Embodiment 2, a mine positioning method based on a specific optical frequency, comprising the following steps:

[0046] On-line or off-line acquisition of specific optical frequency for LED light source;

[0047] For different collection frequencies, store the frequency and serial number information in the database;

[0048] Take the light source image of the LED light source and perform image processing to obtain the corresponding light frequency parameters;

[0049] Use the improved clustering method to compare the parameters with the information in the database to obtain the light frequency information of the light source at the position to be measured;

[0050] Compare the corresponding relationship between the optical frequency information and the map information in the database, and return the exact location information to the user.

[0051] In the embodiment, when the user moves, the image search method is used to obtain the motion vector estimation, and the mo...

Embodiment 3

[0052] Example 3, such as figure 2 As shown, the specific frequency data analyzed in the previous step is compared with a large amount of data in the database to obtain the optical frequency information. The specific steps include:

[0053] Multiple miners take pictures with mobile terminals in the area to be measured;

[0054] Using the classification clustering algorithm, first randomly select K samples in the database as the centroids of K clusters, and calculate the distance to the cluster centroid for each obtained optical frequency value, and the cluster with the closest distance is used as the class to which the sample point belongs;

[0055]Assign each sample point to a class in the database, recalculate the centroid for each cluster, and repeat the calculation until the change of the centroid reaches the preset value;

[0056] The light frequency information obtained by taking pictures is represented by the weighted mean of the cluster;

[0057] Finally, the miner'...

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Abstract

The invention discloses a mine underground positioning system and a positioning method based on a specific optical frequency. The system comprises an LED light source module, a database, a mobile terminal, a server, a control module and an LED driving module, wherein the LED light source module is used for emitting the LED light source; the database is used to store LED light source information; amobile-end camera is used to collect an LED light source image and upload the LED light source image to a server at the same time, and a mobile-end inertial navigation system is used to realize motion tracking and real-time navigation; the server calculates the spectral stripe information of the LED light source image, the spectral stripe information is compared with the LED light source information in the database, and exact position information is finally returned to the mobile end; the LED driving module is used to drive the LED light source module; and the control module is used to enablethe LED driving module. The characteristics of different visible optical frequency are used and the inertial navigation technology is combined for auxiliary positioning, and the positioning and navigation accuracy in a complex mine environment is improved.

Description

technical field [0001] The invention belongs to the field of underground positioning technology, and in particular relates to an underground positioning system and positioning method based on a specific optical frequency. Background technique [0002] Navigation needs to locate the target in real time, and accurate positioning can better plan the path and carry out accurate navigation. [0003] GPS positioning technology has limitations. For example, when the object to be positioned is located indoors, it is difficult to receive satellite signals, and the positioning accuracy of GPS is on the order of meters. For some mine operations that require precise positioning, the accuracy of GPS is much lower. Not enough. In order to solve the above technical problems, visible light communication has been widely used in recent years based on the advantages of low cost, large coverage and high positioning accuracy. Scholars at home and abroad have studied the Kramero lower bound of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/16G01C21/18G01S1/70
CPCG01C21/165G01C21/18G01S1/70
Inventor 刘伟伟唐蕾刘婷婷韦朴花涛
Owner NANJING INST OF TECH
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