Multimode hybrid indoor positioning method

Abstract

The invention belongs to the field of indoor positioning, and particularly relates to a multimode hybrid indoor positioning method. The method adopts a signal transmitting base station and a signal receiving end, wherein the signal transmitting base station transmits multimode hybrid signals which are received by the signal receiving end and determining the position of the signal receiving end. The method comprises the following steps: S1, uniformly recognizing and transcoding multimode hybrid signals to obtain coarse granularity signals, and receiving the coarse granularity signals by the signal receiving end; S2, preliminarily correcting the coarse value of an RSSI (Received Signal Strength Indicator); S3, adopting a mean signal secondary correction method based on a stack set; and S4, modeling and calculating with a triangular centroid algorithm to obtain the position of the receiving end. According to the method, three-in-one hardware integration and algorithm development are performed on WiFi positioning, Bluetooth positioning and radio frequency identification positioning technologies to overcome mutual defects, so that the accuracy of positioning and navigation is improved and high comprehensive performance is realized.

Description

technical field [0001] The invention belongs to the field of indoor position navigation and positioning, and in particular relates to a multi-mode hybrid indoor positioning method. Background technique [0002] In the field of indoor positioning and navigation technology, especially in museums, memorial halls and other venues with dense and rich exhibits, the existing technology is a three-in-one hardware integration and integration of WiFi positioning, Bluetooth positioning and radio frequency identification positioning technology. Algorithms are developed to make up for each other's shortcomings, thereby improving the accuracy of positioning and navigation, so that tourists can accurately and automatically obtain positioning explanations, navigation and guidance instructions of exhibits when visiting indoors. But its shortcomings are: the hardware cost of WiFi positioning technology is very low, and it can realize complex and large-scale positioning, monitoring and trackin...

AI Technical Summary

Problems solved by technology

But its shortcomings are: the hardware cost of WiFi positioning technology is very low, and it can realize complex and large-scale positioning, monitoring and tracking tasks, but it cannot achieve precise positioning; the advantage of Bluetooth indoor positioning technology is that the device is small in size and low in power consumption. , the transmission is not affected by the line-of-sight, but the system stability is slightly poor, and it is greatly disturbed by noise signals; the infrared positioning accuracy is relatively high, but it can only be transmitted by line-of-sight, poor penetration, easily affected by environmental factors, complex layout and poor positioning effect However, it is very limited; the overall accuracy of ultrasonic indoor positioning is very high, reaching the centimeter level, the structure is relatively simple, it has certain penetration and strong anti-interference ability, but the attenuation in the air is relatively large, and the reflection distance is affected by many Path effect and non-line-of-sight propagation have a great impact, resulting in high investment costs for underlying hardware facilities that require accurate analysis and calculation;

[0003] Radio frequency identification indoor positioning technology has a very short working distance, but it can obtain centimeter-level positioning accuracy information within a few milliseconds, and can be transmitted non-line-of-sight, with a large transmission range, small marking volume, low cost, and relatively high system complexity. Low, can provide relatively accurate positioning accuracy, but it does not have communication capabilities, anti-interference ability is average, and layout is required in advance, and its international standardization is not perfect

[0004] If these technologies are used alone, they have certain limitations. For example, although infrared positioning and ultrasonic positioning have high positioning accuracy, their signal penetration, anti-interference and applicability are very poor, and they cannot be used on mainstream mobile devices.

At present, although there is a positioning method that combines WiFi positioning and Bluetooth for accuracy compensation, it cannot make full use of the accuracy advantages of Bluetooth Low Energy BLE, and has not yet developed a comprehensive positioning application for signal mixing.

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