Continuous real-time data acquisition and transmission method in wireless sensor monitoring network

Abstract

The invention discloses a method for continuously acquiring and transmitting data in real time in a wireless sensor monitoring network, belonging to the technical field of wireless sensor networks. The method comprises the following steps that: the last one sampling time of each acquisition cycle is reserved to leaf nodes to receive synchronous packets sent by a management node; the leaf nodes send data acquired in the previous acquisition cycle in a first sampling time of an acquisition cycle to a base station; synchronous adjustment of an acquisition clock and a sending clock is realized by adopting a double-timer mechanism; the leaf nodes send data packets in an indefinite cycle; therefore, packet sending conflict when the nodes adjust synchronization can be avoided; the nodes in a channel can be ensured to send the data packets orderly in a conflict-free manner; the management node sends the synchronous packets to various channel leaf nodes in an indefinite cycle in the last one sampling time of each acquisition cycle; the synchronous error problem due to crystal oscillation temperature drift can be improved; the synchronous packets are not in the sending time of the nodes while arriving in each node at each time; and thus, the loss probability of the synchronous packets can be reduced.

Description

technical field [0001] The invention discloses a continuous real-time data collection and transmission method in a wireless sensor monitoring network, belonging to the technical field of wireless sensor networks. Background technique [0002] Wireless sensor network is an emerging technology gradually developed in the past ten years. It integrates sensor technology, embedded computer technology, communication technology, power supply technology and other technologies, and can enable people to obtain more detailed, reliable information. [0003] In the field of wireless monitoring, sensor nodes are required to have a certain sampling frequency, but the sampling frequency is generally not very high; if it is necessary to dynamically obtain the response of the monitoring object, it must be ensured that all acquisition channels of the monitoring object need to be collected synchronously; if online In order to ensure the response of the observed object, it must ensure that the d...

AI Technical Summary

Problems solved by technology

Finally, because the crystal oscillator of each node in the network will drift due to the influence of temperature and environment, and the data acquisition synchronization between nodes will deviate under long-term work, so each node on each channel must be able to Synchronous package received

If the node is in the data sending state, it cannot receive the synchronization packet, which will cause the entire network to be in disorder

At the same time, it is also necessary to ensure that when each synchronization packet arrives at each node, it cannot fall within the sending time of the node, otherwise the synchronization packet will be lost

[0005] At present, there are no relevant patents related to continuous real-time acquisition and transmission methods of wireless sensor monitoring networks at home and abroad

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