Soil multiparameter sensing measurement system

Abstract

The invention discloses a soil multiparameter sensing measurement system which comprises a sensor, a data acquisition processing unit and a power supply part. The sensor comprises a probe circuit, middle stainless steel tubes and peripheral stainless steel tubes, wherein the middle stainless steel tubes and the peripheral stainless steel tubes are fixed through a printed circuit board (PCB). The power supply part is a power supply circuit and comprises a heat source constant flow source and a system voltage stabilization source which provides power for the whole system. The soil multiparameter sensing measurement system can acquire data of multiple parameters of soil simultaneously and effectively solves the problem that simultaneous measurement cannot be achieved in soil physics. Besides, by utilizing a frequency dispersion method to measure soil water content, interference to measurement of the soil water content caused by factors such as the soil temperature and salt content can be effectively reduced, the application range of the sensor is expanded, and measurement accuracy of the soil water content is improved. The head of the sensor adopts the specially-designed PCB, so that connection matching between the probe circuit and a probing needle is effectively achieved, the microwave reflected value is reduced, the measurement accuracy is improved, and maintenance of the sensor and replacement of the probing needle are facilitated.

Description

technical field [0001] The invention relates to the technical field of design and application of soil physics multi-parameter acquisition sensors, in particular to a soil temperature, volumetric water content, heat capacity, thermal conductivity, evaporation, soil water saturation measurement technology and frequency domain reflection technology. Sensors that collect physical parameters such as temperature and soil porosity at the same time and in the same place. Background technique [0002] Soil is the loose surface layer on the surface of the Earth's lithosphere and is the substrate for terrestrial plant life. It provides the nutrients and water necessary for plant life, is an important ecological factor affecting plants, and is an important place for material and energy exchange in the ecosystem. As an important matrix of the earth's ecosystem, the measurement and research of soil physical parameters is an important guarantee for the smooth progress of people's life and...

AI Technical Summary

Problems solved by technology

These techniques can only measure one or two kinds of soil physical parameters, and it is difficult to analyze the information of multiple physical parameters on the same point of soil, because the prior measurement of any physical parameter will disturb the soil at that point and cause subsequent Interference of row data measurement conditions

If the measurement is near this point, strict data comparison cannot be carried out, so it will bring difficulties to the measurement of soil physical parameters

At the same time, some measurement techniques use laboratory methods after soil sampling. Soil sampling will not only disturb the soil, but also cannot realize the on-site and automatic measurement data. It is a device that simultaneously measures important physical parameters such as evaporation rate, evaporation, and soil water saturation, which is of great significance to soil physics research.

Images