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A monitoring method for asphalt pavement compaction based on fiber bragg grating sensing

A fiber grating and asphalt pavement technology, which is applied to roads, roads, road repair and other directions, can solve the problem of not controlling the number of times of asphalt pavement compaction in real time, achieves significant promotion and application value, prevents overpressure or insufficient compaction, and improves construction. quality effect

Active Publication Date: 2017-04-12
HARBIN INST OF TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] To sum up, there is no simple and effective method to control the compaction times of asphalt pavement in real time.

Method used

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  • A monitoring method for asphalt pavement compaction based on fiber bragg grating sensing
  • A monitoring method for asphalt pavement compaction based on fiber bragg grating sensing
  • A monitoring method for asphalt pavement compaction based on fiber bragg grating sensing

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specific Embodiment approach 1

[0046] Specific implementation mode 1, refer to figure 1 This embodiment is described in detail. A method for monitoring asphalt pavement compaction based on fiber Bragg grating sensing described in this embodiment is implemented based on an asphalt pavement compaction monitoring device. The asphalt pavement compaction monitoring device 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 ends of the fiber grating vertical strain sensor 2 are connected to the fiber grating demodulator through cables 10 data signal output and input terminals; the data signal input and output terminals of the fiber grating temperature sensor 8 are connected to the data signal output and input terminals of the fiber grating demodulator 10 through cables; the data output terminals of the fiber grating demodulator 10 are connected to the central processi...

specific Embodiment approach 2

[0059] Specific implementation mode two, refer to Figure 4 Describe this embodiment. This specific embodiment is a further description of the asphalt pavement compaction monitoring method based on fiber Bragg grating sensing described in the first specific embodiment. In this embodiment,

[0060] The central processing unit 11 includes a vehicle photographing 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 camera module 12 is used to take pictures when the b road roller 7 rolls the nth fiber grating vertical strain sensor 2 or the mth fiber grating temperature sensor 8, and sends the images obtained by taking pictures to image recognition and image quantity statistics 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 b-th road roller 7 rolling the n-th fibe...

specific Embodiment approach 3

[0065] Specific Embodiment 3. This specific embodiment is a further description of a method for monitoring asphalt pavement compaction based on fiber Bragg grating sensing described in Specific Embodiment 2. In this embodiment,

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

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

[0068] Step three and two, the data storage and processing module 14 in the central processing unit 11 makes the tempera...

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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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Patent Type & Authority Patents(China)
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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