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Indoor positioning optimization method based on decreasing radius of maximum circle

An optimization method and indoor positioning technology, applied in the field of indoor positioning, can solve the problem of low accuracy of the positioning method, and achieve the effect of improving the accuracy of approximate points and improving the robustness.

Pending Publication Date: 2021-10-08
SOUTHEAST UNIV
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  • Claims
  • Application Information

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Problems solved by technology

[0004] Purpose of the invention: Aiming at the above-mentioned existing technologies, an indoor positioning optimization method based on decreasing maximum circle radius is proposed to solve the problem of the accuracy of the original positioning method when the point to be measured is too close to a certain beacon and a circle in a circle occurs. not high problem

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  • Indoor positioning optimization method based on decreasing radius of maximum circle
  • Indoor positioning optimization method based on decreasing radius of maximum circle
  • Indoor positioning optimization method based on decreasing radius of maximum circle

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Embodiment Construction

[0017] The present invention will be further explained below in conjunction with the accompanying drawings.

[0018] An indoor positioning optimization method based on the decreasing maximum circle radius, by setting three beacons to receive the signals emitted by the transmitter, the signal strength measured by the three beacons is converted into the distance from the beacon to the transmitter, and the beacon coordinates As the center of the circle, three circles are formed with the distance as the radius. If there is a circle within a circle, such as Figure 4 As shown, the location coordinate estimation includes the following steps:

[0019] Step 1: Define O1 and O3 as the center of a pair of circles that appear, find out the radius R of the larger circle O3 in the circle of circles;

[0020] Step 2: Step the radius R of the circle O3 with a length of The decrement operation, r1 is the radius of the circle O1, the radius after decrement is R', such as Figure 5 As shown...

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Abstract

The invention discloses an indoor positioning optimization method based on decreasing the radius of a maximum circle, and the method comprises the steps: decreasing the radius of the maximum circle under the condition that a circle in a circle appears, so that the position relation of three circles is changed, and the three circles intersect pairwise; then, subsequent position coordinate estimation is carried out by using a trikeratin centroid positioning algorithm or a weighted trikeratin centroid positioning algorithm, so that the problem of low accuracy of approximate point coordinates caused by directly using an original centroid positioning algorithm under a circle-in-circle condition can be effectively solved.

Description

technical field [0001] The invention relates to an indoor positioning method. Background technique [0002] Large-scale indoor places, such as shopping malls, underground parking lots, etc., have large areas, complex spatial layout structures, and intersecting passages and corridors. It is difficult for people to quickly know their location and surrounding conditions, and they need the help of indoor positioning technology. Therefore, indoor positioning It is a hot research direction at present. The principle of indoor positioning is to use the characteristic that the received signal strength will decrease with the increase of the propagation distance. By setting up three beacons to receive the signals emitted by the transmitter, the signal strength measured by the three beacons is converted into signal strength. Mark the distance to the transmitter to form three circles. Under normal circumstances, the positional relationship between the three circles will intersect in pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/02H04W4/33H04W4/021G01S5/12
CPCH04W4/023H04W4/33H04W4/021G01S5/12
Inventor 徐建闵可吴昌隆丁强杨逸凡
Owner SOUTHEAST UNIV