PH detection double compensating method for soil matrix culture multi-parameter compound sensor

Abstract

The invention provides a pH detection double compensating method for a soil matrix culture multi-parameter compound sensor. The water content theta is output by a water content sensor through a signal processing circuit, voltage E is output by a pH sensor through the signal processing circuit, and temperature T is output by a thermal resistance temperature sensor through the signal processing circuit; the water content theta is judged, if theta is smaller than 10%, the pH measurement result is incredible, the water content is increased, and measurement is carried out again until the water content theta is larger than 10%; if theta is smaller than 50% and larger than 10%, the pH measurement result is processed in a temperature and water content double compensating mode, and if theta is larger than 50%, the pH measurement result is processed in single temperature compensating mode. By means of temperature and water content compensation of the prepared pH detection soil matrix culture multi-parameter compound sensor, pH measurement adaptability and accuracy under different water content and temperature conditions are improved.

Description

technical field [0001] The invention relates to the field of preparation of electrochemical sensors, and more specifically relates to a pH detection double compensation method of a multi-parameter composite sensor for soil substrate cultivation, which is used to realize the pH test of soil with a certain water content and a cultivation substrate. Background technique [0002] Soil and cultivation substrate are composed of a mixture of minerals and organic matter. There are solid, gas and liquid states, which belong to a heterogeneous system. Liquid and gas mainly exist in the gaps of solid particles. The complex composition and heterogeneous mixed state make Soil exhibits very different physical and chemical properties, which brings difficulties to the in-situ measurement of physical and chemical properties of soil cultivation substrates. [0003] The pH measurement of soil and cultivation substrate, etc., is essentially to detect the concentration of hydrogen ions in the so...

AI Technical Summary

Problems solved by technology

The above studies are mainly aimed at the pH detection in the solution environment, and the temperature compensation of the pH electrode can improve the pH detection accuracy to a certain extent, but the pH detection and compensation in complex environments such as soil and cultivation substrate have not been involved.

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