Sound positioning system and method without time synchronization

Abstract

The invention discloses a sound positioning system and a sound positioning method without time synchronization, which are designed for solving the problems of dependency of the conventional positioning system on the time synchronization and errors and extra overhead caused by the time synchronization. The sound positioning system comprises a node to be positioned, more than two receivers, a server and a wireless access point (AP), wherein the node to be positioned is used for producing sound source signals to the outside; the more than two receivers are divided into a standard receiver and a beacon receiver and used for recording the sound source signals emitted by the node to be positioned and successive sound source signals emitted to the outside by the standard receiver and outputting the record data after the recording is completed to the server; the server is used for receiving the record data output by each receiver, calculating the position of the node to be positioned according to the record data and displaying the position of the node to be positioned on an interface of the server; and the wireless AP is used for constructing a wireless local area network consisting of the node to be positioned, the receivers and the server. According to the system and the method, the time synchronization in the positioning system is removed, and good positioning precision is obtained.

Description

technical field [0001] The invention relates to the field of a wireless sensor network, in particular to a sound positioning system and method without time synchronization in the wireless sensor network. Background technique [0002] With the popularization of wireless mobile devices, many applications based on context-aware emerge as the times require. In the scenarios on which these applications are based, location is often one of the most important factors, for example: in environmental monitoring, it is necessary to know the specific location where environmental information is collected; on the battlefield, it is necessary to know the area where enemy personnel and equipment move; Management needs to know the exact location of the accident and so on. In these applications, monitors often use wireless sensor networks to monitor events. In this case, in order to obtain the location where the monitoring event occurs, the geographic location of the sensor node itself must ...

AI Technical Summary

Problems solved by technology

[0011] It can be seen that time synchronization introduces additional communication overhead, consumes the limited energy of sensor nodes, and leaves enough time error to bring a large distance error to the positioning system using high-speed signals (such as radio frequency signals), so that positioning Significantly lower accuracy

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