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Method and device for online detecting concentration of hypophosphite ions or sulfate ions

A technology of sulfate ion and phosphite, which is applied in the direction of instruments, character and pattern recognition, computer parts, etc., can solve the problems of high detection cost, long detection cycle, and inability to realize online detection, etc., and achieve low detection cost and high detection efficiency. short cycle effect

Inactive Publication Date: 2011-07-27
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

[0003] In order to solve the problems of long detection period, high detection cost and inability to realize online detection in the existing phosphite and sulfate detection technology, the present invention proposes an online detection technology for phosphite or sulfate ions Concentration methods and devices

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  • Method and device for online detecting concentration of hypophosphite ions or sulfate ions
  • Method and device for online detecting concentration of hypophosphite ions or sulfate ions
  • Method and device for online detecting concentration of hypophosphite ions or sulfate ions

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Embodiment Construction

[0017] The specific embodiment of the present invention provides a method for online detection of phosphite or sulfate ion concentration, such as figure 1 As shown, the method may specifically include:

[0018] Step 11: Establish a nutrient component model based on the corresponding relationship between the components of the nutrient solution and the pH value and EC value in the growth period and growth environment of the crop to be tested, and the parameters of the nutrient solution obtained through real-time detection.

[0019] Specifically, through the experimental research and analysis of the crop growth mechanism of nutrient hydroponics, the following rules have been obtained:

[0020] (1), each nutrient solution component maintains a relatively stable relationship with the pH value (pH value), EC value (conductance) under the growth period and growth environment of the crop;

[0021] (2) During the growth period, the crop absorbs the components of the nutrient solution ...

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Abstract

The invention provides a method and a device for online detecting concentration of hypophosphite ions or sulfate ions, belonging to the agricultural field of induction technology, intelligent instrument and facility. The method and the device can be used for solving the problems that in the existing technology of detecting hypophosphite and sulfate, the detecting period is long, the detecting cost is high and the online detection can not be realized. The corresponding method comprises the steps of establishing a nutrition composition model according to the nutrient parameters obtained by the nutrient solution parameters obtained in real-time detection and by the relationship between the pH value and the EC value of the nutrient solution component in the growth period and growth environment of crops to be detected; establishing least-square support vector machine regression model according to the sampling result on the nutrient solution parameter in the prearranged period; and obtaining the concentration of hypophosphite ions or sulfate ions of the crops to be measured at any moment according to the least-square support vector machine regression model. The method and the device can realize the aim of online estimating the low-concentration hypophosphite composition and sulfate composition within the scope of 10 to 70mg / l and 10 to 150mg / l.

Description

technical field [0001] The invention relates to a virtual ion electrode method for online detection of phosphite and sulfate in soilless culture nutrient solution, belonging to the fields of sensing technology, intelligent instruments and facility agriculture. Background technique [0002] The ion selective electrode is an electrochemical sensitive device, which is a kind of PVC membrane electrode. The membrane electrodes with different properties constitute different ion selective electrodes, which can be used to detect the ion species and their concentration changes in aqueous solution. Phosphite and sulfate are a large number of elements contained in the nutrient solution used in facility agriculture soilless cultivation, and play an important role in the growth of greenhouse crops. Due to the limitations of current materials and preparation technology, phosphite and sulfate (concentration is low, wherein the possible range of phosphite in the nutrient solution is: 16mg / l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/26G06K9/66
Inventor 陈锋张旭孙欣欣徐雅洁
Owner UNIV OF SCI & TECH OF CHINA
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