Identification method of characteristic wave in roadbed rolling
A recognition method and characteristic wave technology, applied in character and pattern recognition, instruments, calculations, etc., can solve problems such as insufficient accuracy
Active Publication Date: 2022-07-22
RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI +1
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Problems solved by technology
At the present stage, methods such as multi-channel surface wave method are used to evaluate the vibration wave of packing compaction state. The disadvantages are that the accuracy is not enough. The main application schemes include geological exploration, etc. There are few methods for the detection of packing compaction state.
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Embodiment Construction
[0052] A method for identifying characteristic waves in a roadbed rolling process, comprising the following steps:
[0053] 1. Arrange the acceleration sensor in the filling material under construction, collect the real-time acceleration signal, and obtain the acceleration time-history curve of the unsteady signal .
[0054] 2. In order to decompose the above non-stationary signal into a stable IMF characteristic data sequence with stable sequence, firstly, empirical mode decomposition EMD is used to stabilize the acceleration non-stationary signal;
[0055] The specific method is:
[0056] input original signal , find the maxima and minima of the signal species, and use the cubic spline function to fit the upper envelope according to the local maxima and minima respectively and the lower envelope ;
[0057] Calculate the local mean of the upper and lower envelopes , and consider the original signal and envelope mean difference, that is .
[0058] make , th...
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The identification method of characteristic waves in the process of subgrade rolling, the method of discriminating the rolling state and its application, including arranging the acceleration sensor in the filler under construction, collecting the real-time acceleration signal, and obtaining the acceleration time of the unsteady signal. The above-mentioned unsteady signal is decomposed into a stable IMF characteristic data sequence with a stable sequence, and the empirical mode decomposition EMD is used to stabilize the acceleration unsteady signal. Through the real-time monitoring of the vibration waves at the ground measuring points, and through the decomposition method of the vibration waves, the vibration waves with the most vibration characteristics of the vibratory roller are extracted and analyzed. The rolling state of the filler was evaluated. During the vibration compaction process, the energy in the filler increases with the number of compaction passes, so that the rolling state of the filler can be directly judged by analyzing the energy of the characteristic wave.
Description
technical field [0001] The invention relates to a state discriminating method and application thereof, in particular to a method for identifying characteristic waves in a subgrade rolling process, a rolling state discriminating method and application thereof, belonging to the field of railway construction design. Background technique [0002] According to my country's "Outline of Railway Advance Planning for a Powerful Country in Transportation in the New Era" in August 2020, it is proposed that my country's railway network will be the first to be built, and the railway network will be interconnected at home and abroad. About 10,000 kilometers, cities with a population of more than 200,000 will be covered by railways, and cities with a population of more than 500,000 will be accessible by high-speed rail. By 2050, a more developed and complete modern railway network will be built. With the increase of the mileage of my country's high-speed railway, the construction section o...
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IPC IPC(8): G06K9/00
Inventor 叶阳升蔡德钩闫宏业尧俊凯安再展毕宗琦朱忠林李竹庆李泰灃刘晓贺梁经纬苏珂
Owner RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI