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Airport pavement structure health state intelligent monitoring device and evaluation method

A technology for health status and intelligent monitoring, applied in measurement devices, complex mathematical operations, instruments, etc., can solve the problems of complex layout, inability to efficiently obtain the dynamic response of the pavement structure, and easily damaged lines, and achieve the effect of simple layout.

Active Publication Date: 2021-11-19
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]First, the sensing devices inside the pavement structure are mostly wired sensors, which have problems such as complex layout, fragile lines, and poor coupling with the pavement structure
As a result, it cannot efficiently and accurately obtain the internal change response of the pavement structure under the action of external loads and the environment;
[0005]Secondly, the type of data acquired by sensors currently used for internal monitoring of pavement structure is relatively single, and it is impossible to comprehensively obtain different types of data reflecting changes in the health status of pavement structure. parameter;
[0006]Third, the location of the sensor is unreasonable, and the dynamic response of the pavement structure under the action of external load cannot be obtained efficiently;
[0007] Fourth, traditional sensors are all aimed at monitoring the pavement structure health at a certain point or small area, and cannot evaluate the macro health status of the pavement structure;
[0008] Fifth, the pavement structure evaluation method needs to be improved, and the parameters obtained by the built-in sensors of the pavement structure cannot be used to evaluate the health of the pavement structure in real time

Method used

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  • Airport pavement structure health state intelligent monitoring device and evaluation method
  • Airport pavement structure health state intelligent monitoring device and evaluation method
  • Airport pavement structure health state intelligent monitoring device and evaluation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] In this embodiment, the data processing device 1 can have a built-in Kalman filter algorithm and other algorithm structures, and perform a process on parameters such as force and motion obtained by the three-axis gyroscope 2, the three-axis accelerometer 3, the three-axis magnetometer 4, and the strain gauge 7. Noise reduction processing.

[0077] The three-axis gyroscope 2, the three-axis accelerometer 3, and the three-axis magnetometer 4 are respectively used to obtain the change information of the sensor device's rotation angle, acceleration and direction in different directions of x, y, and z under the action of load and environmental factors. Obtain the motion response inside the pavement structure. Since this type of sensor does not need to sense external force information, it is placed in the high-strength frame 9, thereby better protecting the sensing device from negative effects of external loads and environmental factors. Strain gauges and temperature sensors...

Embodiment 2

[0082] A kind of multi-function pavement health status intelligent monitoring system of the present embodiment is further improved on the basis of embodiment 1, and the data processing device 1 adopts the pavement structure parameter information received by the following calculation model processor:

[0083]

[0084]

[0085] Among them, D f is the fatigue cracking index of pavement structure, D r is the rutting damage index of pavement structure, ε t is the longitudinal tensile strain at the bottom of the asphalt layer, E is the modulus of the structural layer to be tested, RD is the estimated rutting depth of the structural layer to be measured, ε z is the vertical strain of the structure layer to be measured, k is the depth influence factor, h' is the thickness of the structure layer to be measured, T is the temperature of the structure layer measured by the sensor, θ is the rotation angle of the sensor device along the x, y, and z directions average value.

[0086...

Embodiment 3

[0093] A multifunctional pavement performance monitoring system in this embodiment is further improved on the basis of Embodiment 2, and the mechanical and motion information obtained by a limited number of sensing devices is substituted into the CEM pavement structural performance prediction model proposed by the present invention. , to predict the structural performance of any other point of the pavement structure, the specific algorithm is as follows:

[0094] CEM assumes that the movement or force situation ψ(x,y,z) of any point in the pavement structure can be obtained by a limited number of sensing devices and its random error R(x,y,z) To express, that is: ψ(x,y,z)=c(x,y,z)+R(x,y,z)

[0095] The CEM method adopts a weighted estimation method and its purpose: According to the force and motion obtained by n limited and limited number of sensing devices [(x 1 ,y 1 ,z 1 ),(x 2 ,y 2 ,z 2 ),...,(x n ,y n ,z n )] to estimate any unknown point in the macro pavement stru...

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Abstract

The invention provides an airport pavement structure health state intelligent monitoring device and an evaluation method, and belongs to the field of pavement structure health state intelligent monitoring. A framework of the device is of a square structure, wherein a power supply device, a data processing device, a three-axis gyroscope, a three-axis accelerometer, a three-axis magnetometer and a wireless transmission device are arranged in the framework; the three-axis gyroscope, the three-axis accelerometer, the three-axis magnetometer, a strain gauge and a temperature sensor are respectively connected with the data processing device, and the data processing device is connected with the wireless transmission device; the wireless transmission device transmits the obtained data to an external terminal; and a monitoring group is formed by a plurality of monitoring devices, a plurality of the monitoring groups are formed, the plurality of monitoring groups are respectively arranged on an airplane front wheel load surface in an airport pavement, an airplane two-side main wheel load surface in the airport pavement and a position, close to the edge, of the airport pavement. The airport pavement structure health state intelligent monitoring device can be embedded in a to-be-measured structure, and changes of parameters such as mechanics, movement and temperature in the surface structure can be accurately sensed.

Description

technical field [0001] The invention provides an intelligent monitoring device and evaluation method for the health state of pavement pavement structures at airports, belonging to the field of intelligent monitoring of pavement structure health states. Background technique [0002] The structural disease of airport pavement, especially the internal disease, has become one of the important factors affecting the health status of airport pavement structure in service and flight safety. It is important to monitor the health status changes inside the airport pavement structure in real time and evaluate its health status. An important guarantee for the long-term safe operation of the airport. [0003] At present, the traditional airport pavement structure monitoring devices and structural health assessment methods mainly have the following problems: [0004] First, most of the sensing devices inside the pavement structure are wired sensors, which have problems such as complex lay...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D21/02G06F17/10
CPCG01D21/02G06F17/10
Inventor 张伟光王宁马涛
Owner SOUTHEAST UNIV