Indoor positioning method based on Bluetooth signal RSSI

A bluetooth signal and indoor positioning technology, applied in positioning, wireless communication, transmission monitoring, etc., can solve the problems of poor positioning accuracy, achieve the effect of improving computing speed, ensuring accuracy and computing speed, and simplifying the computing process

Inactive Publication Date: 2019-05-21
核芯互联科技(青岛)有限公司
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Problems solved by technology

[0004] Therefore, an embodiment of the present invention provides an indoor positioning method based on Bluetooth signal RSSI

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  • Indoor positioning method based on Bluetooth signal RSSI

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Embodiment 1

[0040] Such as figure 1 As shown, the indoor positioning method based on Bluetooth signal RSSI proposed in this embodiment includes the following steps:

[0041] S1. Deploy N Bluetooth base stations in the positioning site and obtain the coordinates of the Bluetooth base stations, where N≥3. Preferably, the Bluetooth base station adopts a Bluetooth gateway supporting the Bluetooth protocol above 4.0, and deploys multiple Bluetooth gateways in a ceiling, wall or horizontal manner. The Bluetooth gateway includes a method for transmitting the measured RSSI value of the Bluetooth signal to the mqtt protocol. The WiFi module of the mqtt server, the background positioning system obtains the detection data of the Bluetooth gateway from the mqtt server, the Bluetooth signal source adopts the Bluetooth beacon that supports the Apple standard ibeacon protocol and the Bluetooth protocol above 4.0, and the deployment distance of each Bluetooth gateway is controlled within ten meters. A con...

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Abstract

An embodiment of the invention discloses an indoor positioning method based on a Bluetooth signal RSSI. The method comprises the following steps of disposing N Bluetooth base stations at a positioningposition and acquiring the coordinate of a Bluetooth base station; setting a Bluetooth signal source at a positioning point, and acquiring Bluetooth signal RSSI values of N Bluetooth base stations; respectively calculating the distance d between each Bluetooth base station and the Bluetooth signal source according to a calculating model d=10((ABS(RSSI)-A)/(10*n)), wherein A is the measured Bluetooth signal strength of the bluetooth base station at a position which is separated from the Bluetooth signal source by 1m, n is an environment attenuating factor; and according to the distances d andcoordinates of three Bluetooth base stations with lowest distances d to the Bluetooth signal source, and obtaining the coordinate of the positioning point through calculation of a quasi-Newton method.The new method prevents a condition of solving an ill-conditioned equation set, and ensures high accuracy of the positioned coordinate. Furthermore compared with a traditional Newton algorithm, the method according to the invention has advantages of simplifying a calculation process and improving operation speed.

Description

Technical field [0001] The embodiment of the present invention relates to the technical field of indoor positioning, in particular to an indoor positioning method based on Bluetooth signal RSSI. Background technique [0002] Indoor positioning technology refers to the realization of position positioning in an indoor environment. It mainly uses multiple positioning technologies such as wireless communication, base station positioning, and inertial navigation positioning to form an indoor position positioning system to realize position monitoring in indoor spaces. Common indoor wireless positioning technologies mainly include Wi-Fi, Bluetooth, infrared, ultra-wideband, RFID, ZigBee, and ultrasound. The indoor positioning technology based on Bluetooth signals has the advantages of low power consumption and easy integration. The current mainstream Bluetooth positioning scheme is based on trilateral positioning. The basic principle of Bluetooth positioning is to use the Bluetooth sign...

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Application Information

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IPC IPC(8): G01S5/14H04B17/318H04W64/00
Inventor 贾晓玮张威森
Owner 核芯互联科技(青岛)有限公司
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