Firefighter positioning method, system and device based on wireless sensing technology

Abstract

The invention discloses a firefighter positioning method, system and device based on wireless sensing technology. Sensor nodes comprise reference nodes of the known location information and blind nodes of unknown location information in the network positioning process of the wireless sensor, the method comprises the following steps: firstly collecting the reference node location information when performing the blind nodes positioning, and then performing the ranging and positioning to obtain the node location; correcting ranging error and positioning error by mutually positioning reference nodes for a problem that the RSSI error is large under the non-line of sight situation at a fire protection spot; compensating the error when positioning the blind nodes, thereby effectively reducing theerror caused by the ranging and the error caused by the positioning algorithm itself; secondly, improving the positioning precision through a weighted-centroid algorithm based on the quantum particleswarm for the problem that the positioning algorithm based on the RSSI ranging or dispensing with the ranging is low in positioning precision. The firefighter positioning method, system and device based on wireless sensing technology disclosed by the invention can be extensively applied to the sensing field.

Description

technical field [0001] The invention relates to the field of sensing, in particular to a firefighter positioning method, system and device based on wireless sensing technology. Background technique [0002] Nowadays, various natural or man-made disasters occur frequently, including earthquakes, fires, mine disasters, car accidents or explosions caused by criminals maliciously, etc., which have caused tragic loss of life and property to human society. Only fire has occurred since 1993. The direct property losses caused over the past few years have risen to an average of more than one billion yuan per year, and more than 2,000 people have died each year. When the above disasters occur, firefighters need to rescue them in time. How to monitor and locate the situation and personnel at the fire scene in real time, and how to evacuate the trapped people in an emergency, avoid danger and search and rescue, all of which need to be combined with the latest communication technology to...

AI Technical Summary

Problems solved by technology

Ultrasonic signals are greatly affected by multipath effects and non-line-of-sight propagation, and are not suitable for indoor environments; infrared rays are only suitable for short-distance propagation, and are easily interfered by other indoor or outdoor light, resulting in a large ranging error. Therefore, There are great limitations in indoor precise positioning: the most widely used outdoor positioning technology is GPS (Globalpositioning system), on this basis, there are also branches such as enhanced GPS and auxiliary GPS, which can be widely used in aviation , navigation and field positioning and other fields

[0007] Among the existing UWB sensor positioning research results, none of the positioning schemes can effectively reduce communication overhead, reduce power consumption, and save network bandwidth while obtaining high positioning accuracy and positioning coverage. The existing TOA, TDOA and AOA is a Range-based positioning algorithm, which can achieve relatively accurate positioning functions, but due to cost, power consumption and hardware limitations, some applications cannot be used

However, the RSSI-based ranging technology has the advantages of less required hardware equipment and low cost, so the present invention adopts a ranging method based on received signal strength, but in the actual environment, conditions such as obstacles and propagation models often change. Yes, the positioning accuracy needs to be improved

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