Fiber grating sensing-based asphalt pavement compaction monitoring method

A fiber grating and asphalt pavement technology, applied in the direction of roads, roads, road repairs, etc., can solve the problem of not controlling the number of asphalt pavement compaction in real time, and achieve significant promotion and application value, reduce early-stage diseases, and improve construction quality.

Active Publication Date: 2015-12-23
HARBIN INST OF TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] To sum up, there is no simple and effective method to

Method used

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  • Fiber grating sensing-based asphalt pavement compaction monitoring method
  • Fiber grating sensing-based asphalt pavement compaction monitoring method
  • Fiber grating sensing-based asphalt pavement compaction monitoring method

Examples

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Example Embodiment

[0046] Specific implementation mode one, reference figure 1 Detailed description of this embodiment, the method for monitoring asphalt pavement compaction based on fiber grating sensing in this embodiment is implemented based on an asphalt pavement compaction monitoring device, which includes n optical fibers Grating vertical strain sensor 2, m fiber grating temperature sensors 8, fiber grating demodulator 10, central processing unit 11 and cables; the data signal input and output end of the fiber grating vertical strain sensor 2 is connected to the fiber grating demodulator through the cable The data signal output and input terminal of 10; the data signal input and output terminal of the fiber grating temperature sensor 8 is connected to the data signal output input terminal of the fiber grating demodulator 10 through a cable; the data output terminal of the fiber grating demodulator 10 is connected to the central processing unit 11 The output and input terminals; n and m are ...

Example Embodiment

[0059] Specific implementation mode two, reference Figure 4 To explain this embodiment, this embodiment is a further explanation of the method for monitoring asphalt pavement compaction based on fiber grating sensing described in the first embodiment. In this embodiment,

[0060] The central processing unit 11 includes a vehicle camera module 12, an image recognition and image quantity statistics module 13, a data storage and processing module 14, and a display module 15;

[0061] The vehicle photographing module 12 is used to take pictures when the b-th road roller 7 crushes the n-th fiber grating vertical strain sensor 2 or the m-th fiber grating temperature sensor 8, and sends the photographed image to the image recognition module 13;

[0062] The image recognition and image quantity statistics module 13 is used to identify the received images, and count the number of images of the nth fiber grating vertical strain sensor 2 or the mth fiber grating temperature sensor 8 rolled by t...

Example Embodiment

[0065] Specific embodiment three. This specific embodiment is a further description of the method for monitoring asphalt pavement compaction based on fiber grating sensing described in specific embodiment two. In this embodiment,

[0066] The central processing unit 11 in step 3 processes the received data and displays the rolling results to obtain a reasonable rolling frequency. The process is as follows:

[0067] Step 31. When the b rollers 7 are running at a constant speed and are operating at the same time, the central processing unit 11 numbers the b rollers, and the image recognition and image number statistics module 13 in the central processing unit 11 counts the b rollers 7 Rolling times a of n fiber grating vertical strain sensors 2 or m-th fiber grating temperature sensor 8; a is a positive integer;

[0068] Step 32. The data storage and processing module 14 in the central processing unit 11 makes the temperature response data of the fiber grating temperature sensor 8 comp...

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Abstract

The invention discloses a fiber grating sensing-based asphalt pavement compaction monitoring method, relates to the field of compactness quality control in an asphalt pavement construction process, and aims at meeting the requirements of simply and effectively controlling the asphalt pavement compaction times in real time. A fiber grating vertical strain sensor and a temperature sensor are implanted into a lower layer of a monitored asphalt layer; the fiber grating vertical strain sensor and a fiber grating interrogator are in butted connection; an asphalt mixture of the monitored layer is paved; a road roller collects information sent out by the fiber grating vertical strain sensor while grinding; a change curve of a strain response peak of the fiber grating vertical strain sensor along with the grinding times is extracted; a compaction evaluation index SDI is obtained through curve differentiation; when the SDI is close to 0 for successive two times, grinding is stopped; and compaction monitoring of the asphalt pavement is finished. The fiber grating sensing-based asphalt pavement compaction monitoring method is applicable to compaction quality monitoring of other pavements.

Description

technical field [0001] The invention relates to the field of compaction quality control in the construction process of asphalt pavement, in particular to a compaction monitoring method in the construction process of highway asphalt pavement based on optical fiber grating sensing technology. Background technique [0002] Asphalt pavement is the main structural form of high-grade pavement in my country. As we all know, compaction has an important impact on the performance of asphalt pavement. If the asphalt pavement is not properly compacted, under-compacted or over-pressurized, it is difficult to obtain good pavement performance even if the asphalt pavement material used is of high quality. It also directly leads to the occurrence of some asphalt pavement diseases. For example, under-compacted asphalt pavement is prone to rutting, water damage and cracks, while overpressured asphalt pavement is prone to oil flooding and some instability. Therefore, compaction is a very impor...

Claims

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Application Information

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IPC IPC(8): E01C23/01G01N33/42
Inventor 王海朋谭忆秋马韶军徐慧宁
Owner HARBIN INST OF TECH
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