Node order automatic deduction method of bridge health monitoring sensor network using signal strength

A bridge health monitoring and automatic derivation technology, which is applied in the transmission system, network topology, wireless communication, etc., can solve the problems of no practical method for deriving the order of nodes, and achieve the effects of reducing deployment costs, low time overhead, and high accuracy

Active Publication Date: 2015-11-11
NANJING UNIV
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  • Claims
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AI Technical Summary

Problems solved by technology

[0003] At present, there is no practical way to derive the order of nodes

Method used

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  • Node order automatic deduction method of bridge health monitoring sensor network using signal strength
  • Node order automatic deduction method of bridge health monitoring sensor network using signal strength
  • Node order automatic deduction method of bridge health monitoring sensor network using signal strength

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Embodiment Construction

[0024] The present invention can be divided into three stages: data collection, data sorting, and automatic sorting.

[0025] Phase 1: Data Collection

[0026] When the sensor nodes have just been deployed in the actual environment, or new nodes are added, or some sensor nodes are replaced due to damage, or the software may change the node number during the update process, the manager must worry about Whether there is a situation that the node number is inconsistent with the pre-arranged situation, at this time, the manager can make the sink node initiate this method. To this end, the sink node broadcasts a special start message, which reaches each sensor node through a single-hop or multi-hop approach.

[0027] After receiving this instruction, the sensor nodes independently and periodically broadcast a message called "short message". The short message message contains the following two fields: sender number SenderID, message sequence number MsgSeq, such as figure 1 shown....

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Abstract

The invention discloses a node order automatic deduction method of a bridge health monitoring sensor network using signal strength. The method comprises the steps as follows: (1) starting, an aggregation node transmitting a starting instruction to the bridge health monitoring sensor network, and the node order automatic deduction method is started; (2) data collection, the sensor node freely broadcasts a message after receiving an instruction and simultaneously monitors signals of other nodes, and records the signal strength, and returns the collected signal strength data back to the aggregation node; (3) data disposal, the aggregation node disposes the collected signal strength data according to a transmission node and the serial number of a data package to remove the incomplete data; (4) automatic sequence, the aggregation node executes the proposed sort algorithm to each group of disposed data and provides a relative node order; (5) ending, the aggregation node outputs a sorting sequence while obtaining same relative order for many times, and transmits to a terminating instruction to the network, and the sensor node stops broadcasting the message and collecting the data.

Description

1. Technical field [0001] The present invention proposes a practical node sequence derivation method for a sensor network with a linear topology arranged on a bridge, which can be used without adding additional hardware, without affecting the normal operation of the network, and only needing to add a small amount of code at the node end Next, the relative order of nodes is automatically deduced. The present invention is also applicable to sensor networks arranged on roads, straight trees and other linear topological structures. 2. Background technology [0002] The use of sensor networks for bridge health monitoring, road condition monitoring, and ecological data collection of Zhishu is a typical application of sensor networks. In these scenarios, sensor nodes present a one-dimensional layout or linear topology. We call this type of network " Linear Sensor Network". In a linear sensor network, the order of nodes refers to the ordering of nodes in physical space. For exampl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W24/04H04W84/18H04L12/24
CPCH04L41/12H04W24/04H04W84/18
Inventor 陈贵海朱小军吴小兵戴海鹏
Owner NANJING UNIV
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