Plant root system temperature monitoring method and device

Abstract

The invention discloses a plant root system temperature measurement and control method and device, and the method comprises the steps that a first electrode is inserted into soil at one side of a to-be-monitored plant, a second electrode is inserted into the other side of the to-be-monitored plant, and a third electrode is clamped on the rhizome of the to-be-monitored plant; the impedance spectroscopy measurement unit sends sine waves with a series of frequencies, the sine waves are converted into excitation current signals through a D / A converter and a voltage-controlled current source, the excitation current signals are input into the third electrode, and response voltage signals flow out from the first electrode and the second electrode; the response voltage signal passes through an A / D converter and then is input into an FPGA processing unit, the FPGA processing unit carries out impedance spectrum calculation to obtain an impedance value, and the current root temperature is obtained through a set temperature-impedance curve; the monitoring result is accurate, plant root system damage is avoided, detection can be achieved without digging out the root system from soil, sample damage is reduced, operation is easy, and the cost is low.

Description

technical field [0001] The invention relates to the technical field of intelligent agriculture, in particular to a method and device for monitoring the temperature of plant roots. Background technique [0002] The root system is an important component organ of plants. It can not only fix plants, but also absorb water, inorganic salts and mineral ions in the soil. A good plant root system is an important guarantee for the healthy growth of plants. The monitoring of plant root growth status and root Temperature control is extremely important. However, since plant roots grow in non-transparent soil and cannot be observed directly, it is difficult to study roots. At present, the measurement methods of plant root system include excavation method, mesh bag method, soil column method, nail plate method, micro root canal method, root window method and so on. The traditional plant root system measurement method will cause damage to the plant root system, resulting in measurement er...

AI Technical Summary

Problems solved by technology

This device makes full use of solar energy and reduces energy consumption, but it is also limited by the unstable energy source, which cannot provide the heat needed by plants in winter when the sun is thin or in the dark at night

The root temperature heating system based on hot water cannot accurately control the root temperature, because this method only has a heating device, no temperature monitoring system, and cannot give feedback. Even if a temperature sensor is added, the measured temperature is only the soil temperature, which cannot be directly measured root temperature

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