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Rapid soil nutrient detection system and method capable of synchronously collecting LIBS (laser-induced breakdown spectroscopy) and NIRS (near infrared spectroscopy) spectrums

A technology of synchronous collection and soil nutrient, applied in color/spectral characteristic measurement, material analysis through optical means, measurement device, etc., can solve problems such as difficult to achieve measurement, complex composition, difficult to meet actual production needs in precision and stability, etc. , to achieve the effects of compact design, high-precision and stable detection, and elimination of interference from spectral detection

Pending Publication Date: 2022-04-08
HUAZHONG UNIV OF SCI & TECH
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  • Claims
  • Application Information

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Problems solved by technology

According to statistics, in 2015, the amount of chemical fertilizer used in my country was about 60 million tons, but the actual utilization rate of chemical fertilizer was less than 40%.
However, due to the complex composition of the soil matrix, the differences in soil moisture content and organic matter content have serious matrix effects on its LIBS detection, making it difficult for the accuracy and stability of soil nutrient LIBS detection to meet actual production needs.
In addition, NIRS has good detection performance for soil nitrogen, moisture content and organic matter, but it is difficult to measure phosphorus and potassium in soil.

Method used

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  • Rapid soil nutrient detection system and method capable of synchronously collecting LIBS (laser-induced breakdown spectroscopy) and NIRS (near infrared spectroscopy) spectrums
  • Rapid soil nutrient detection system and method capable of synchronously collecting LIBS (laser-induced breakdown spectroscopy) and NIRS (near infrared spectroscopy) spectrums
  • Rapid soil nutrient detection system and method capable of synchronously collecting LIBS (laser-induced breakdown spectroscopy) and NIRS (near infrared spectroscopy) spectrums

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Experimental program
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Embodiment 1

[0046] refer to figure 1 , combined with Figure 2 to Figure 9 , the soil nutrient quick detection system that the LIBS and NIRS spectrum synchronous collection that the present embodiment provides comprises: LIBS collection device 3, NIRS collection device 13, optical assembly 19, sample moving device 16, control device 9, sample pool assembly 31, touch Unit 25, chassis 23, sample stage 29, and feet 10; the four feet 10 are located at the bottom of the entire detection system, the chassis 23 is located directly above the feet 10, and the feet 10 and the chassis 23 are fixed together by bolts The sample stage 29 is located at the middle and lower part of the inside of the cabinet 23, and the sample stage 29 and the cabinet 23 are connected together by bolts; the LIBS detection device 3 is located inside the cabinet 23, the upper left of the sample stage 29; the optical assembly 19 is located inside the cabinet 23, The upper right of the sample stage 29; the sample cell assemb...

Embodiment 2

[0057] refer to Figure 10 , the present invention also provides a kind of soil nutrient quick detection method that LIBS and NIRS spectrum are collected synchronously, comprising:

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Abstract

The invention discloses a soil nutrient rapid detection system and method capable of synchronously collecting LIBS and NIRS spectrums, and belongs to the field of optics and soil nutrient detection.According to the designed detection system, through reasonable layout, it can be guaranteed that an LIBS collecting device and an NIRS collecting device synchronously collect the spectrums, the collected spectrum data are from the same sample, and the detection accuracy is improved. Therefore, the influence of spatial-temporal change of the sample on the detection precision is effectively reduced. According to the detection method designed by the invention, the linear relationship between the contents of different matrix chemical substances and the intensity of each nutrient characteristic spectral line is fitted, and the NIRS prediction model for predicting the content of each matrix chemical substance is established, so that the intensity of the corresponding nutrient characteristic spectral line detected by LIBS is corrected; the interference of a matrix effect on spectrum detection is effectively eliminated, and high-precision stable detection of soil nutrients is realized.

Description

technical field [0001] The invention belongs to the field of optics and soil nutrient detection, and more specifically relates to a rapid soil nutrient detection system and method for synchronous collection of LIBS and NIRS spectra. Background technique [0002] Soil provides various nutrients for crop growth, and its nutrient abundance has an important impact on crop growth and yield. In order to meet the needs of population growth for food production, chemical fertilizers are widely used in agricultural planting. Due to the lack of rapid soil nutrient detection technology that meets actual production needs, excessive use of chemical fertilizers is often used in production to ensure crop growth and yield. According to statistics, in 2015, the amount of chemical fertilizer used in my country was about 60 million tons, but the actual utilization rate of chemical fertilizer was less than 40%. A large amount of chemical fertilizers that have not been absorbed by crops enter w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/71G01N21/3563G01N21/25
Inventor 李祥友鲁兵陈吉朱晨薇
Owner HUAZHONG UNIV OF SCI & TECH
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