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Pavement damage degree detection method based on information entropy of sensor network

A sensor network and detection method technology, applied in the direction of processing the response signal of detection, can solve the problems of inability to perform real-time monitoring, large human and material resources, etc., and achieve the effect of being less susceptible to noise interference, improving the accuracy of results and high precision

Inactive Publication Date: 2019-11-22
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this technology requires a lot of manpower and material resources, and cannot be monitored in real time

Method used

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  • Pavement damage degree detection method based on information entropy of sensor network
  • Pavement damage degree detection method based on information entropy of sensor network
  • Pavement damage degree detection method based on information entropy of sensor network

Examples

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Effect test

Embodiment 1

[0079] In this embodiment, the method for detecting the degree of road surface damage based on sensor network information entropy includes the following steps:

[0080] Step 1. Set at least one signal transmitter and one signal receiver on the road surface, which are used to generate signals and receive signals respectively; the positions of the signal transmitter and signal receiver in this embodiment are arranged as figure 2 As shown, the damage set as Figure 4 shown.

[0081] In the present embodiment, a synthetic Gaussian modulated sine wave with dispersion (wave number correlation frequency) and white noise is used as a propagating wave to be emitted by a signal transmitter, and the propagating wave is:

[0082]

[0083] where x is the spatial position of the wave and x 0 is the spatial reference, k 0 is at the carrier frequency ω 0 The wave number at C g is the group velocity, C p is at ω 0 The phase velocity at , σ 2 is the width of the wave packet at t=0, ...

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Abstract

The invention provides a pavement damage degree detection method based on the information entropy of a sensor network, and the method comprises the following specific steps: setting at least one signal transmitter and one signal receiver on a pavement, wherein the signal transmitter and receiver are respectively used for generating signals and receiving signals; applying the received signal to STWE to obtain the information entropies of the signals; and processing the information entropies by applying a TOA algorithm based on STWE, determining the sum of information entropy amplitudes, and determining that the overlapping positions of a plurality of elliptical trajectories in a chart are the positions where the cracks are located according to a relation chart of the sum of the informationentropy amplitudes and the positions. According to the invention, the damage positioning can be carried out at a high noise level, and the result precision is improved through STWE.

Description

technical field [0001] The invention designs a pavement damage detection technology, and in particular relates to a pavement damage degree detection method based on sensor network information entropy. Background technique [0002] Cement concrete pavement is a road surface with cement concrete as the main material. Cement concrete pavement was used earlier in our country. Because of its high strength, good stability and durability, it is widely used in urban roads, airport runways, station wharves, etc. However, due to the rigidity of the cement concrete pavement itself, the cement concrete pavement is prone to fracture cracks, subsidence, swelling and other diseases due to thermal expansion and contraction during the service process, coupled with the repeated action of driving load and other constraints. Therefore, the damage of cement concrete pavement will directly affect the safety and comfort of driving, and the damage monitoring of cement concrete pavement is especial...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/44
CPCG01N29/44
Inventor 姚波王思其刘云峰郭鹏成李木子
Owner NANJING UNIV OF SCI & TECH
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