Road internal stress and strain dynamic response information acquisition system and method

A technology of dynamic response and internal stress, applied in special data processing applications, instruments, electrical and digital data processing, etc., can solve problems such as inability to calculate, high noise, low information ratio, etc., to achieve the effect of ensuring reliability

Active Publication Date: 2019-09-06
RES INST OF HIGHWAY MINIST OF TRANSPORT
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Problems solved by technology

The main problems of this method are: (1) All kinds of modulus inversion models are simplified models based on a certain mechanical assumption. For the double coupled nonlinear (material nonlinear + structural nonlinear) response of road In terms of multi-layer structure, the calculation results of different models under the same parameter conditions and the same model under different parameter conditions have large deviations, and it is difficult to judge the

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  • Road internal stress and strain dynamic response information acquisition system and method
  • Road internal stress and strain dynamic response information acquisition system and method
  • Road internal stress and strain dynamic response information acquisition system and method

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Embodiment 1

[0058] The fwd control load is 5 tons, and each detection point is tested 3 times. The sensor collection frequency is 2000Hz, and the road structure is a 7-story structure, with a total of 55 stress and strain sensors (the first 4 floors have strain sensors, and the last 3 floors have no additional ones). See the diagram of detection points and sensor layout figure 2 . The test time is half an hour, the total amount of data is about 1GB, and there are 30 data files.

[0059] According to content of the present invention, concrete implementation steps are as follows:

[0060] (1) The dynamic acquisition unit sends the data within half an hour to the data server sent as a data file in one minute, with a total of 30 files;

[0061] (2) The file reading module obtains data files from the data server one by one by time data;

[0062] (3) The data analysis module analyzes the format of the original data file to obtain the real-time response data of the internal stress and strai...

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Abstract

The invention relates to a road internal stress and strain dynamic response information acquisition system and method, belonging to the field of road internal mechanical state detection. Four detection points are arranged during fwd detection. Response data is acquired through stress, strain sensors and a dynamic data acquisition unit which are buried in each structural layer in roads. According to recorded data of each layer of stress and strain sensor and the response time, awaveform is obtained. Effective graphic data is intercepted by the waveform response time, spliced, filtered, and theabnormal data is eliminated to obtain the result data. The response baseline calculation, response duration calculation, response peak record, peak interval record, and peak number record are completed in order. According to the invention, sensors and loads are arranged in a multi-point manner, through a reasonable and standard data processing flow, the system error of a data result is effectivelyreduced, and uncertain errors caused by fatigue, unfamiliar conditions and the like in a manual processing process are avoided.

Description

technical field [0001] The invention relates to the field of road internal mechanical state detection, in particular to the acquisition of road internal stress and strain dynamic response characteristic values ​​for FWD detection. Background technique [0002] The mechanical state of the internal structure of the road is the most direct indicator to evaluate the quality of the road and predict the life of the road. However, it is often difficult to obtain the true state of the internal structure of the road in the actual road. At present, the method usually used in road research is to measure the deflection data of the road surface through fwd (that is, the falling weight deflection meter), and then use the modulus back calculation model to calculate the modulus of each layer of the road, so as to know the road Mechanical properties of the internal structure. The main problems of this method are: (1) All kinds of modulus inversion models are simplified models based on a cer...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F2119/06G06F30/20
Inventor 关伟王旭东吴将丰
Owner RES INST OF HIGHWAY MINIST OF TRANSPORT
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