High-resolution-degree soil sensor

Abstract

The invention discloses a high-resolution-degree soil sensor; a sensing probe is connected with an evaporator through a water absorption core; the top of the evaporator is provided with an evaporation cap; the evaporation cap is connected with the top of the water absorption core; the water absorption core is immersed in a liquid in a water storage pipe; the evaporation cap obtains moisture from the water storage pipe through the water absorption core, and simultaneously, the moisture is evaporated to the atmosphere; the bottom of the water absorption core is provided with a floating column; the outer wall of the floating column is provided with a water absorption layer with strong hydrophilicity, and the water absorption layer goes up and down along with the up and down of the surface of water; the sensing probe is a humidity sensing plaster body, the outer layer of the humidity sensing plaster body is a porous ceramic filter layer, and the outmost layer of the sensing probe is provided with a netted plastic protection cover. The sensor and the evaporator are in split type design, so the soil sensor is quite convenient to use, reliable in operation, and good in long-term stability, and the evaporation cap obtains the moisture from the water storage pipe through the water absorption core, simultaneously, the moisture is evaporated to the atmosphere, the floating column makes the distance between the evaporation cap and the surface of the water remain unchangeable still, the measurement resolution degree is high and is 1%, and the measurement accuracy can reach +/-3%.

Description

technical field [0001] The invention belongs to the technical field of sensors, in particular to a high-resolution soil sensor. Background technique [0002] With the further improvement of people's living standards, planting vegetables and flowers is gradually becoming a social fashion. However, due to the lack of experience in growing vegetables and flowers, coupled with the fast pace of modern people's life and the high probability of going out, they failed to water in time, resulting in poor growth or even death of vegetables and flowers in Wengjing. Therefore, a device with the function of indicating or reminding when to water is needed to help people easily raise vegetables and flowers. [0003] When the existing watering reminder is used, two probes connected with a hygrometer are inserted into the soil to be tested, and the humidity of the soil is determined by measuring the resistance between the probes. When the humidity drops to a certain value, the reminder wil...

AI Technical Summary

Problems solved by technology

The reminder has complex structure, high cost, inconvenient use, and battery consumption, so it has not been accepted by the majority of flower lovers so far.

In the existing online real-time measurement of soil water content, the negative pressure method needs to be prepared for water injection before use, which is cumbersome; the capacitance method has poor stability; although the time domain reflectometry (TDR) has good stability and high measurement accuracy, But the price is very expensive: Although the gypsum resistance method has the advantages of low price, convenient use, and high performance-cost ratio, the current products have disadvantages such as poor long-term stability, and it is difficult to promote and popularize

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