Wireless sensor network signal synchronous collection and quasi-live transmission system

Abstract

The invention discloses a wireless sensor network signal synchronous acquisition and on-time and real-time transmission method; wireless nodes in a wireless sensor network are divided into three kinds: a central node, a trunking node and a wireless sensor node, wherein, the central node is connected with a computer of a detection center for data transmission between the network and the computer; the trunking node and the central node are combined to a multi-hop chain type topological structure to realize a data long-distance transmission network; according to the information received from the trunking node, the wireless sensor node selects to join to a detecting unit controlled by a certain trunking node in order to send the own acquired data to the trunking node. In addition, the wireless sensor network adopts vibration signals to sample an initialization mode before the beginning and sample an on-time and real-time data transmission mode after the beginning. The wireless sensor network is characterized in low power consumption, large distribution range, timely and accurate detecting signal transmission, etc., and is suitable for wide popularization in the field of large-scale civil structure vibrating state detection.

Description

technical field [0001] The invention relates to a quasi-real-time transmission technology for synchronous signal acquisition and measurement data, specifically, in a multi-hop wireless sensor network suitable for large-scale civil structure vibration state detection, to realize synchronous sampling between wireless sensor nodes, and The measurement data of the sensor nodes is returned to the transmission system of the detection center in a quasi-real-time manner. Background technique [0002] Large-scale civil structures play a pivotal role in people's life and work. However, in the course of decades or even hundreds of years of use, large-scale civil structures are subjected to erosion from harsh environments, and the natural aging of materials will inevitably form damage accumulation. , leading to a decline in the ability to resist natural disasters or even normal loads, posing a threat to the safety of people's lives and property and the country's economic construction. T...

AI Technical Summary

Problems solved by technology

At present, the IEEE 802.11 protocol, Zigbee protocol, and Bluetooth protocol are widely used communication protocols in wireless networks. These protocols are relatively complex, and in the case of multi-hop network topology, there are problems in global clock synchronization, real-time service processing, and fairness. problems, and requires a dedicated chip to achieve, can not fully meet the particular needs of large-scale civil structure state detection

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