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A Probabilistic Model-Based Bluetooth Indoor Positioning Method

A probabilistic model, indoor positioning technology, applied in positioning, instruments, measuring devices, etc., can solve the problems of large deployment workload, inability to achieve precise positioning, and difficulty in positioning system, and achieve accurate positioning, low system deployment workload, and high difficulty. simple structure

Active Publication Date: 2021-08-31
BEIJING BOOCAX TECH CO LTD
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AI Technical Summary

Problems solved by technology

[0004] Bluetooth indoor positioning technology is usually divided into two types, one is proximity detection, that is, the distance between the Bluetooth mobile terminal and iBeacon is divided into three levels: far, medium, and near. For the positioning of the Bluetooth mobile terminal, only whether it is near the iBeacon The second is fingerprint-based positioning technology, which needs to collect Bluetooth signal fingerprints from various places in the indoor movable space before realizing positioning. Therefore, the deployment workload of this positioning system is very large and difficult. Big

Method used

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  • A Probabilistic Model-Based Bluetooth Indoor Positioning Method
  • A Probabilistic Model-Based Bluetooth Indoor Positioning Method
  • A Probabilistic Model-Based Bluetooth Indoor Positioning Method

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Embodiment Construction

[0063] figure 1 Yes, the schematic diagram of the principle of Bluetooth indoor positioning; x, y, z represent the three-dimensional space coordinate system, A 1 、A 2 、A 3 、A 4 Indicates 4 iBeacon base stations, TAG indicates a mobile Bluetooth BLE device, d 1 、d 2 、d 3 、d 4 Indicates the distance between the Bluetooth BLE device and four iBeacons.

[0064] attached Figure 1-2 It can be seen that a bluetooth indoor positioning method based on a probabilistic model,

[0065] Deploy Bluetooth iBeacon base stations in indoor environments, and record the UUID and three-dimensional coordinates of each iBeacon;

[0066] Deploy Bluetooth BLE devices in indoor environments;

[0067] Calculate the distance between the Bluetooth BLE device and the 4 Bluetooth iBeacon base stations,

[0068] Using the conditional probability model P(D i |d i ) to represent the known measurement distance d i actual distance D i the probability distribution of

[0069] According to the mea...

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Abstract

The invention relates to a bluetooth indoor positioning method based on a probability model, which deploys a bluetooth iBeacon base station in an indoor environment, and records the UUID and three-dimensional coordinates of each iBeacon; deploys a bluetooth BLE device in an indoor environment; calculates the Bluetooth BLE device and bluetooth iBeacon For the distance of the base station, the conditional probability model is used to represent the probability distribution of the actual distance when the measured distance is known; according to the measurement information and the conditional probability model, the position coordinates of the Bluetooth BLE device in space are determined. The probabilistic model-based bluetooth indoor positioning method of the present invention has simple structure, small system deployment workload and accurate positioning.

Description

technical field [0001] The invention relates to an indoor positioning method, in particular to a bluetooth indoor positioning method based on a probability model. Background technique [0002] The biggest advantage of Bluetooth indoor positioning technology is that the device is small in size and easy to integrate into smart phones and tablet computers, so it is easy to popularize. Theoretically, for a user with a mobile terminal device integrated with a Bluetooth function, as long as the Bluetooth function of the device is turned on, the Bluetooth indoor positioning system can judge its location. When this technology is used for indoor short-distance positioning, it is easy to find the device and the signal transmission is not affected by the line-of-sight. [0003] With the release of the Bluetooth 4.0 standard specification, Bluetooth has many features such as ultra-low power consumption, 3ms demonstration, ultra-long distance above 100m, and AES-128 encryption. Based o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S5/10G01S5/02G01S5/00G01C21/20
Inventor 浦剑涛
Owner BEIJING BOOCAX TECH CO LTD