Soil water content measurement device and method based on microwave heating principle

Abstract

The invention discloses a microwave heating principle-based soil water content measurement device and method. The measurement device comprises a soil containing vessel; the bottom wall of the soil containing vessel is provided with a hollow isolation body; the lower part of the hollow isolation body is provided with an opening; the bottom wall of the soil containing vessel is provided with a through hole communicating with the opening in the lower part of the hollow isolation body; a hollow pipe used for injecting water into the hollow isolation body is arranged in an inner cavity of the hollow isolation body along the vertical direction; the hollow pipe penetrates through the opening in the lower part of the hollow isolation body, and extends out from the through hole in the lower part of the soil containing vessel; the through hole in the lower part of the soil containing vessel and the opening in the lower part of the hollow isolation body are sealed with the pipe wall of the hollow pipe; a temperature sensor is arranged in the inner cavity of the hollow isolation body; a wire of the temperature sensor penetrates through a pipe hole of the hollow pipe and extends out from the lower end of the hollow pipe, and is used for connecting a temperature measurement device, and the lower part of the hollow pipe is sealed after the hollow isolation body is filled up with water through the hollow pipe. Through the measurement device and method disclosed by the invention, the soil water content can be very quickly measured.

Description

technical field [0001] The invention belongs to soil water content measuring devices, in particular to a soil water content measuring device and method based on the principle of microwave heating. Background technique [0002] The water content of the soil affects the engineering properties of the soil, especially for cohesive soils. The water content directly affects the physical state of the soil and determines the bearing capacity of the foundation soil. At present, the methods for measuring the moisture content of soil mainly include the drying method and the alcohol burning method. Among them, the drying method is the method required by the specification, and the test results are the most authoritative, but both methods are time-consuming and the measurement efficiency is low. The microwave soil water content measurement method proposed in some literatures actually uses microwaves to evaporate the water in the soil. Compared with the drying method, the test time of this...

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Problems solved by technology

[0003] According to the principle of microwave heating, the higher the water content of the soil, the faster the temperature rises under the action of microwaves. In order to solve the shortcoming of the current time-consuming soil water content test, a method based on the microwave heating principle that can quickly measure the water content of the soil is invented. Measuring device and method

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