Soil body shrinkage limit tester based on image analyzing method

Abstract

The invention discloses a soil body shrinkage limit tester based on an image analyzing method and an analyzing method thereof. The soil body shrinkage limit tester comprises a protection box, wherein the protection box is internally provided with an electronic scale; the electronic scale is provided with a shrinkage vessel; a soil sample is put into the shrinkage vessel, and a camera is arranged above the soil sample; the camera is fixed by a camera fixing bracket which is arranged at the bottom of the protection box and can rotate and retract; the protection box is internally provided with a temperature and humidity controller; and data lines of the electronic scale, the camera and the temperature and humidity controller are connected with a computer outside the protection box. The protection box and the temperature and humidity controller have the effects of preventing equipment micro-motion caused by air flowing and controlling and maintaining the temperature and humidity of an evaporation environment. According to the soil body shrinkage limit tester, the camera is used for photographing at intervals; the image analyzing method is used for analyzing dry shrinkage and deformation of a soil body, and a deformation (pixel displacement) moisture content curve is obtained by combining data of the electronic scale, so that the shrinkage limit moisture content of the soil can be directly and accurately judged; and the soil body shrinkage limit tester is simple, convenient and visual to operate, and the measured result is accurate.

Description

technical field [0001] The invention relates to a soil shrinkage limit moisture content tester, in particular to a soil shrinkage limit tester based on an image analysis method. Background technique [0002] The shrinkage limit moisture content of soil refers to the boundary moisture content of soil from semi-solid to solid state. When the moisture content is lower than the shrinkage limit moisture content, the volume of the soil will not change during the change of the moisture content. The shrinkage limit moisture content is one of the three major consistency limits of the soil. The shrinkage limit moisture content is one of the important indicators reflecting the physical properties of soil, and the study of the shrinkage limit moisture content of soil has important academic significance and engineering practical value. The key to the soil shrinkage test is to accurately measure the volume of the soil after drying. At present, the shrinkage test mainly uses the wax seal ...

AI Technical Summary

Problems solved by technology

[0004] 2. Volume measurement accuracy is limited

[0005] 3. The use of mercury method for testing has certain hazards

Although the accuracy of measuring the volume of soil samples using the mercury method is higher than that of the wax sealing method, great care must be taken during the test to avoid harm to the human body caused by excessive mercury evaporation

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