Temperature/humidity sensor-based in-situ wireless soil suction value measurement system

A technology of temperature and humidity sensor and soil suction, which is applied to the field test of the characteristic curve of unsaturated soil soil water, in the field of geotechnical engineering, can solve the problem of maintaining large manpower and material resources, achieve a large suction measurement range, simple and convenient use, and reduce wiring the troublesome effect of

Active Publication Date: 2015-07-22
CHINA THREE GORGES UNIV
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  • Abstract
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AI Technical Summary

Problems solved by technology

This situation makes the humidity sensor method limited to the laboratory, when the soil suction needs to be measured on site, it needs a lot of manpower and material resources to maintain
At the same time, the current sensors used to measure the suction value of the soil often focus on collecting humidity, so the temperature of the soil needs additional equipment to measure

Method used

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  • Temperature/humidity sensor-based in-situ wireless soil suction value measurement system
  • Temperature/humidity sensor-based in-situ wireless soil suction value measurement system
  • Temperature/humidity sensor-based in-situ wireless soil suction value measurement system

Examples

Experimental program
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Embodiment

[0027] The material of the main pipe 1 is a PVC pipe, and its length accounts for two-thirds of the length of the entire measuring probe. One end of the main pipe 1 is sealed by a rubber pad through glue (a round hole is opened in the rubber pad for the antenna of the wireless transmission module 9 to pass through) , the other end of the main body tube 1 is combined with the packaging tube 2 of the temperature and humidity sensor 5 . The material of the package tube 2 is a PVC tube, the two ends of the package tube 2 are sealed by glue through rubber pads, and inserted into the main tube 1 and the tapered tube 3 respectively, the contact parts of any two tubes are glued together, and the joints are sealed with glue.

[0028] The outer diameter of the packaging pipe 2 is slightly smaller than or equal to the inner diameter of the main pipe 1 and the tapered pipe 3. The purpose is to prevent this part of the pipe wall from contacting the soil. The wall of the packaging pipe 2 is ...

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Abstract

The invention discloses a temperature / humidity sensor-based in-situ wireless soil suction value measurement system which comprises a measurement probe, a wireless transmission module and a data processing terminal, wherein the shell of the measurement probe is formed by assembling a main body tube, a package tube and a conical tube; a temperature / humidity sensor, a power module, a control circuit board and a wireless sending module are arranged in the shell of the measurement probe; the wireless transmission module is used for receiving the data signals sent by the wireless sending module and is connected with the data processing terminal; the data processing terminal is used for displaying and processing the measurement data. The temperature / humidity sensor-based in-situ wireless soil suction value measurement system provided by the invention is capable of acquiring the temperature and humidity in the outdoor soil body in real time and sending the acquired data to a receiving terminal in the laboratory through the wireless sending device so as to measure the suction value in the soil.

Description

technical field [0001] The invention relates to an on-site wireless measurement system for soil suction value based on a temperature and humidity sensor, relates to the field of on-site testing of unsaturated soil-water characteristic curves, and belongs to the technical field of geotechnical engineering. Background technique [0002] The soil-water characteristic curve (SWCC) is an important curve describing the relationship between soil suction and water content in unsaturated soil mechanics. The properties of unsaturated soil such as suction, shear strength and permeability can be directly or indirectly known through the soil-water characteristic curve. At present, the methods for measuring soil-water characteristic curve mainly include tensiometer method, temple instrument method, volume pressure plate method, filter paper method, salt solution method and humidity sensor method. Among these methods, the humidity sensor method has the advantages of large suction measurem...

Claims

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Application Information

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IPC IPC(8): G01N33/24
Inventor 张华张沣申科袁密曹金露李茂
Owner CHINA THREE GORGES UNIV
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