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Device for rapid detection of crop nutrient elements based on collinear laser-induced breakdown spectroscopy

A technology of laser-induced breakdown and crop nutrition, which is applied in the direction of material excitation analysis, etc., can solve the problems of the influence of analysis results and the small amount of laser-induced breakdown spectrum analysis, so as to achieve convenient system adjustment, improve collection efficiency and spectral line intensity, The effect of improving detection repeatability

Active Publication Date: 2017-06-20
ZHEJIANG UNIV
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  • Application Information

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Problems solved by technology

However, due to the small amount of laser-induced breakdown spectroscopy analysis, the matrix effect has a significant impact on the analysis results

Method used

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  • Device for rapid detection of crop nutrient elements based on collinear laser-induced breakdown spectroscopy
  • Device for rapid detection of crop nutrient elements based on collinear laser-induced breakdown spectroscopy
  • Device for rapid detection of crop nutrient elements based on collinear laser-induced breakdown spectroscopy

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Embodiment Construction

[0025] Such as figure 1 As shown, a device for rapid detection of crop nutrient elements based on collinear laser-induced breakdown spectroscopy, including a double-pulse solid-state laser 1, a time-delay generator 2, an energy attenuator 3, a real-time monitoring system for laser energy 4, and an optical path climbing system 5. A detector 6, a spectrometer 7, a sample stage 8, a focusing lens 9, an optical fiber collection system 10 and a sample surface imaging system 11.

[0026] Double-pulse solid-state laser 1 has four working modes: (1) 1064nm coaxial output, (2) 532nm coaxial output, (3) 1064nm non-coaxial output (4) 1064nm, 532nm non-coaxial output. The double-pulse solid-state laser 1 can be realized by two single-pulse 1064nm solid-state lasers, a frequency doubling crystal and a beam combining optical path. The repetition frequency of the double-pulse solid-state laser 1 is 1-10Hz, the energy is 80-200mJ (@532nm), 80-300mJ (@1064nm), and the interval between two las...

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Abstract

The invention discloses a device for rapid detection of crop nutrient elements based on collinear laser-induced breakdown spectrum, which includes a double-pulse solid-state laser for generating coaxial double-pulse laser. The repetition frequency of the double-pulse solid-state laser is 1-10 Hz. The energy of 532nm is 80-200mJ, the energy of 1064nm laser is 80-300mJ, and the interval between two laser beams is 200-2000ns; along the optical axis of the double-pulse solid-state laser, energy attenuators and optical path climbing The system and the sample stage, the laser emitted by the optical path climbing system vertically hits the sample surface to generate plasma; it also includes a signal acquisition and processing system, which collects the characteristic spectral lines emitted by the plasma cooling, and inputs the established data model to calculate nutrient content. The invention realizes the rapid detection of crop nutrient elements, has the characteristics of simple operation and low cost, effectively overcomes the characteristics of long detection time and complicated operation of traditional detection methods, and avoids environmental pollution by chemical reagents.

Description

technical field [0001] The invention relates to crop nutrient element detection technology, in particular to a device for rapid detection of crop nutrient elements based on collinear laser-induced breakdown spectrum. Background technique [0002] Crop nutrient elements (nitrogen, phosphorus, potassium, etc.) are closely related to the growth status and yield of crops. Nitrogen, phosphorus, and potassium are the three main nutrients for crops. Nitrogen is a component of pigments, which can promote plant photosynthesis and increase crop yield; phosphorus is a component element of various compounds in crops, which has an important impact on crop quality; potassium can promote crop photosynthesis and enhance crop resistance. Obtaining the information of crop nutrient elements is beneficial to understand the growth status of crops, and realize early quantitative fertilization according to the nutrient deficiency of crops. At present, the detection methods of crop nutrient eleme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/63
Inventor 刘飞彭继宇何勇周菲张初孔汶汶冯雷
Owner ZHEJIANG UNIV
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