In-situ Crop Substrate Nutrient Detection via Laser Plasma Spectroscopy
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Solution Overview
Problem
Existing soil nutrient detection systems are inconvenient, require manual assistance, and produce inaccurate data due to complex structures and manual soil pretreatment, making it difficult to quickly and accurately detect nutrient concentrations in crop cultivation substrates.
Innovation Solution
An in-situ detection device with a water and fertilizer collector and spectral analysis system that collects and analyzes water and fertilizer samples in real-time using a laser with specific wavelengths, eliminating the need for manual handling and pretreatment, and providing continuous sampling for accurate detection of nitrogen, phosphorus, and potassium.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual soil collection and laboratory detection is used, then nutrient concentration can be detected, but the detection process is complicated and time-consuming
Solution Approach 1:
The patent replaces manual mechanical operations (soil collection, transportation, laboratory processing) with an automated in-situ detection system that uses optical fields (laser) to directly measure nutrient concentrations in the cultivation substrate, eliminating the need for physical sample handling and laboratory analysis
Solution Approach 2:
The detection device is designed to be self-contained and autonomous, performing measurements directly at the detection location without requiring external laboratory facilities or manual intervention for sample preparation and analysis
2Measurement precision
If manual soil pretreatment is performed, then detection can be completed, but large deviations occur in detection data
Solution Approach 1:
The patent eliminates manual soil pretreatment operations by using laser-induced plasma spectroscopy to directly analyze nutrients in the cultivation substrate, replacing mechanical and chemical preparation steps with a non-contact optical measurement method that avoids introduction of errors
Solution Approach 2:
The device creates a plasma state copy of the sample elements through laser irradiation, allowing spectral analysis of nutrient elements without physically altering or transporting the actual cultivation substrate sample
3Measurement precision
If spectrum analysis device with complex structure is used, then nutrient detection can be performed, but manufacturing and usage costs increase
Solution Approach 1:
The patent extracts only the essential functional components needed for in-situ nutrient detection (laser source, spectral detector, and basic optical elements), eliminating unnecessary complex subsystems found in traditional laboratory spectrometers, thereby simplifying the device structure while maintaining detection capability
Solution Approach 2:
The patent uses laser technology to change the physical state of sampled elements to plasma, enabling spectral analysis at specific wavelengths that correspond to nutrient elements, achieving accurate detection with a simplified optical system designed for this specific measurement approach
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables convenient, accurate, and real-time detection of nutrient concentrations in crop cultivation substrates, ensuring the growth environment's safety and facilitating risk prediction, with a simple and stable structure that reduces errors and costs.
Implementation Method 1
the laser device emits the laser
Implementation Method 2
the spectrum collection and conversion module collects the optical signal in the plasma state that is generated when the soil to be tested is irradiated by the laser
Implementation Method 3
the spectrum collection and conversion module collects the optical signal in the plasma state that is generated when the soil to be tested is irradiated by the laser. The characteristic spectrum signal is generated via the spectrum collection and conversion module according to the optical signal
Data Source
AI summary
An in-situ detection device for detecting water and fertilizer content in a crop cultivation substrate and a detection method thereof are provided. The in-situ detection device includes a water and fertilizer in-situ collector and a spectrum analysis device. The water and fertilizer in-situ collector that is pre-buried in the cultivation substrate is used to collect water and fertilizer in the cultivation substrate in real time to obtain a measurement sample. The spectral analysis device is used to emit a laser with a specific wavelength to detect and analyze content of nitrogen, phosphorus, and potassium in the measurement sample collected by the water and fertilizer in-situ collector; and a continuous sampling system for continuously transporting the measurement sample is provided between the water and fertilizer in-situ collector and the spectrum analysis device.