Self-adaptive roadbed type compactness online evaluation method and system

An evaluation method and technology of compaction degree, applied in the field of online evaluation of compaction degree of adaptive subgrade type, can solve problems such as restricting the application of intelligent compaction and not being able to accurately reflect the compaction status

Pending Publication Date: 2021-07-23
CHANGAN UNIV
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Problems solved by technology

Therefore, using CCV to evaluate the compaction degree of all soil types cannot accurately reflect the real compaction status, which restricts the application of intelligent compaction

Method used

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  • Self-adaptive roadbed type compactness online evaluation method and system
  • Self-adaptive roadbed type compactness online evaluation method and system
  • Self-adaptive roadbed type compactness online evaluation method and system

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Embodiment Construction

[0035] The present invention is described in further detail below in conjunction with accompanying drawing:

[0036] The present invention proposes an on-line evaluation method for compaction degree of self-adaptive subgrade type, comprising the following steps;

[0037] Step 1, during the construction process of the road roller, according to the set sampling frequency, the vibration signal on the vibration motor 3 of the road roller is collected within a certain period of time.

[0038] Step 2, performing FFT calculation on the collected data to obtain the frequency spectrum characteristics of the vibration signal within the collection time;

[0039] Step 3: Obtain the harmonic component, the magnitude of the fundamental frequency energy and the magnitude of the harmonic energy according to the spectrum characteristics.

[0040] Step 4: According to the fundamental frequency energy and harmonic energy, find out the harmonic components whose amplitude is greater than 0.5, and...

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Abstract

The invention discloses a self-adaptive roadbed type compactness online evaluation method and system. The method comprises the steps of 1, collecting a vibration signal within a certain time according to a set sampling frequency, 2, performing FFT operation on the collected data to obtain the spectral characteristics of the vibration signals within the collection time, 3, obtaining a harmonic component, fundamental frequency energy and harmonic wave energy, 4, according to the fundamental frequency energy and the harmonic wave energy, finding out a harmonic wave component with the amplitude larger than 0.5, and taking the selected harmonic wave component as the basis for evaluating the roadbed compactness, 5, calculating the frequency multiplication of each selected harmonic component and the fundamental frequency, and calculating the CCV value through the frequency multiplication, and 6, in the process that the road roller runs on the whole road, continuously calculating the CCV value within the collection time to obtain a real-time updated CCV value, and performing roadbed compactness evaluation on the current road section by adopting the continuously updated CCV value. The compaction degree of different roadbed compaction processes can be adaptively evaluated.

Description

technical field [0001] The invention belongs to the field of highway engineering, and relates to an on-line evaluation method and system for compactness of self-adaptive subgrade type. Background technique [0002] Highway engineering has made great contributions to strengthening regional connections and promoting regional economic development, which has greatly promoted the development of China's economy. With the rapid development of road construction, high-speed and heavy-duty traffic has a higher quality of road construction. requirements. The quality of highway construction largely depends on the quality control of compaction during subgrade construction. Insufficient compaction and poor compaction quality control will directly affect the strength, stability and durability of the road surface. Therefore, the degree of compaction of the subgrade Control is especially important. [0003] At present, the traditional subgrade compaction detection methods mainly include sa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C23/01E01C3/00E01C19/23
CPCE01C23/01E01C3/00E01C19/23
Inventor 惠记庄来港张军张雅倩张泽宇任余
Owner CHANGAN UNIV
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