Experiment method and apparatus for studying mapping relation between signal strength indication and distance

Abstract

The invention discloses an experiment method and apparatus for studying a mapping relation between signal strength indication and a distance. An industrial robot execution mechanism is fixed at the upper portion of a box body structure on the ground; a first ultrasonic receiving-transmitting probe and a receiving node are fixed at the top end of the industrial robot execution mechanism; an emission node is fixed at one side, facing the ground, of a kite; and a second ultrasonic receiving-transmitting probe is arranged at the emission node. The industrial robot execution mechanism is rotated and is processed by fine tuning, so that the two ultrasonic receiving-transmitting probes are aligned automatically; the distance of the two ultrasonic receiving-transmitting probes is changed by changing the height of the kite; a control circuit board carries out data fitting on multiple groups of signal strength indication values and the corresponding distances and carries out analyzing to obtain a mapping relation between the signal strength indication and the distance. According to the invention, a wireless signal can be effectively prevented from being interfered by various factors like reflection and blocking by an obstacle during ground propagation; and thus the stability and the measuring precision are improved.

Description

technical field [0001] The present invention relates to wireless sensor network technology, in particular to an experimental method and device for studying the mapping relationship between received radio signal strength indication (Received Signal Strength Indication, RSSI) and distance in wireless sensor network. Background technique [0002] Wireless sensor network (wireless sensor network, WSN) is a promising technology in the 21st century. With the development of Internet of Things technology, wireless sensor network has become an indispensable part of today's life. Received Signal Strength Indication (RSSI) is an important parameter in wireless sensor networks. At the same time, RSSI-based ranging technology is more commonly used in wireless sensor network positioning technology. The positioning principle is to measure the distance between nodes by using the principle that radio signals attenuate regularly as the distance increases. The current RSSI distance measuremen...

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Problems solved by technology

[0004] This invention is aimed at the defect that the RSSI value accuracy is not high due to the interference of wireless signals in the actual surface environment due to obstacles such as reflection and blocking. An experimental method and device for studying the mapping relationship between RSSI and distance, which automatically completes distance measurement and RSS1 measurement, with high precision and convenient operation

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