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On-line measurement system of soil crack parameters and the extraction method of soil crack parameters using the system

A technology of parameter extraction and measurement system, applied in the field of online standard measurement system of soil crack parameters, can solve the problems of laboriousness, large error, single extraction parameter, etc.

Inactive Publication Date: 2016-10-26
NORTHEAST INST OF GEOGRAPHY & AGRIECOLOGY C A S
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention aims to solve the problems of time-consuming, labor-intensive, large error and single extraction parameters of the traditional soil crack parameter measurement method

Method used

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  • On-line measurement system of soil crack parameters and the extraction method of soil crack parameters using the system
  • On-line measurement system of soil crack parameters and the extraction method of soil crack parameters using the system
  • On-line measurement system of soil crack parameters and the extraction method of soil crack parameters using the system

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specific Embodiment approach 1

[0054] Specific embodiment one: reference figure 1 Detailed description of this embodiment, the soil crack parameter online measurement system described in this embodiment includes a tripod 1, a digital camera 2, a notebook computer 3, a ring light 4, a digital photometer 5, a sampling frame 6, a black and white colorimetric plate 7 And black and white grid calibration board 8,

[0055] The digital camera 2 is fixed on the tripod 1, the imaging area of ​​the digital camera 2 is directly below it, the ring light 4 is used to illuminate the imaging area of ​​the digital camera 2, and the black and white colorimetric plate 7 is used to white balance the digital camera Processing and gray value stretching processing, the digital photometer 5 is used to measure the background ambient light intensity during each shooting, and the sampling frame 6 is placed in the imaging area of ​​the digital camera 2 to determine the standard crack area size when taking photos , The digital camera 2 ...

specific Embodiment approach 2

[0056] Embodiment 2: This embodiment is the method for extracting soil crack parameters using the soil crack parameter online measurement system described in the first embodiment, and the method is:

[0057] Step 1. Place the sampling frame 6 on the soil so that the soil crack area to be detected is located in the sampling frame 6, and fix the digital camera 2 directly above the sampling frame 6 through the tripod 1, so that the imaging area of ​​the digital camera 2 is covered Sampling frame 6, and the center of sampling frame 6 coincides with the projection point directly below the lens center of the digital camera 2, and a fixed ring light 4 is used to illuminate the area where the sampling frame 6 is located;

[0058] Step 2. Use the digital photometer 5 to measure the ambient light intensity above the tested soil sample, and set the ISO, aperture size and exposure time parameters of the digital camera 2 according to the light intensity to ensure that the light has the same effe...

specific Embodiment approach 3

[0110] Specific embodiment three: This embodiment is different from the method for extracting soil crack parameters using the soil crack parameter online measurement system described in the second embodiment in that it also includes using soil crack parameter extraction software to image the soil crack photos The steps to obtain various wavelet decomposition texture feature parameters of cracked soil are as follows:

[0111] Use the image processing method to select the wavelet decomposition function, set the wavelet decomposition series to perform wavelet decomposition on the crack image, and then extract the various wavelet decomposition texture feature parameters of the cracked soil in the sampling frame 6. The calculation formula is as follows:

[0112] 14) Level L1 norm:

[0113] L 1 H ( i ) = X x = 1 x = n X y = 1 y = N pH ( x , y ) ,

[0114] 15) Vertical L1 norm:

[0115] L 1 V ( i ) =...

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Abstract

The invention relates to an online measurement system for soil crack parameters and a soil crack parameter extraction method using the system, relating to the field of online measurement of soil crack parameters. The invention aims to solve the problems of time-consuming, labor-intensive, large error and single extraction parameters of the traditional soil crack parameter measurement method. According to the present invention, one is to obtain photos of soil cracks, and two is to extract parameters of soil cracks in real time. It can be used for real-time, non-destructive online measurement of soil crack parameters.

Description

Technical field [0001] The invention relates to an online standard measurement system for soil crack parameters, in particular to a standard online measurement device for soil crack photos in the field and real-time crack parameter extraction. Background technique [0002] The phenomenon of soil surface cracking caused by expansive soil water loss and shrinkage is very common in nature, especially in recent years with global warming, urban heat island effect intensification and long-term drought, soil cracking has become more serious. Soil shrinkage and cracking is a complex process, and its influence is distributed in many fields such as soil science, agriculture, engineering geology, and hydrogeology. Among them, agriculture and engineering geology have been most seriously affected. In agriculture, shrinkage cracks increase the evaporation of soil water, control the seepage of groundwater and the diffusion of pollutants, and their size and shape will also change the surface wa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/84G01B11/28
Inventor 任建华李晓洁赵凯
Owner NORTHEAST INST OF GEOGRAPHY & AGRIECOLOGY C A S
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