Soil moisture wireless measuring apparatus

Abstract

A soil moisture wireless measuring device comprises two parts, namely a wireless sensing device and a wireless setting device which is connected with the wireless sensing device and is used for detection operation. The wireless sensing device which is used to measure soil water content, soil temperature and soil compactness comprises an impedance converter, a pressure sensor, a temperature sensor, an information acquisition device, a second wireless communication module and a CPU processor. The wireless setting device which is designed as a hand held type instrument comprises a central controller, and a keyboard input module, a display module, a memory module and a first wireless communication module respectively connected with the central controller. The impedance converter consists of three parts, namely a signal source, a transmission line and a probe. The soil moisture wireless measuring device provided by the invention has the advantages that: the device is capable of measuring the soil temperature, soil compactness and soil water content simultaneously; the device has the performances of high bandwidth, high linearity and low power consumption; the device facilitates the realization of the real-time detection of field soil water content with brief design, simple operation and portability.

Description

technical field [0001] The invention relates to the field of measurement technology, in particular to a wireless soil moisture measurement device. Background technique [0002] At present, in the case of increasingly scarce water resources, water conservation and efficient use of water are more and more universally valued by governments all over the world. Promoting water-saving technology and equipment is an effective way to save water resources and improve the utilization rate of water resources. As a large agricultural country in the world, it is particularly important to seek efficient rapid soil moisture measurement technology for water-saving irrigation. China's population accounts for 22% of the world's total, but fresh water resources only account for 8% of the world's total. The per capita water resources are only 2300m3 / year, which is only equivalent to 1 / 4 of the world's average. It is the world's poorest water resource per capita. One of 13 countries. On the o...

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Problems solved by technology

Obviously, directly applying the cone index in isolation cannot truly and objectively evaluate the degree of soil compaction.

[0007] 3. At present, the soil moisture sensors sold on the market are basically single-point sensors, and the application mainly relies on wired networking, which is not suitable for the needs of long-distance unmanned monitoring systems

[0008] From the above analysis, it can be seen that the existing soil moisture sensors only measure the single parameter of soil moisture content, and neither consider the soil compaction problem that has a significant impact on soil moisture content, nor consider the wireless transmission problem

It is not yet possible to integrate the two important parameters of soil compaction and soil water content into one, and simultaneously measure and realize the unmanned real-time detection of soil water content in the field.

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