Portable Plant Nitrate Detection Device with Retractable Microelectrode
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Solution Overview
Problem
Existing methods for detecting nitric nitrogen in plants are either time-consuming, costly, and destructive, or they fail to provide real-time, nondestructive, and accurate measurements, especially when used in a portable and on-site context.
Innovation Solution
A portable device with a double-barreled glass microelectrode and a mechanical system that includes a belt pulley and cam mechanism to protect the electrode, integrated with a signal processing circuit and display, allowing for real-time detection of nitrate ion concentration in plant leaves without causing damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional detection methods (distillation, diffusion, nitrate boiling) are used, then detection precision is improved, but detection time increases and plant damage occurs
Solution Approach 1:
The patent replaces traditional mechanical/chemical detection methods (distillation, diffusion, nitrate boiling) with an ion microelectrode-based electrical detection system. The microelectrode directly measures nitrate ion concentration through electrical potential differences, eliminating the need for time-consuming chemical processing while avoiding plant damage.
Solution Approach 2:
The patent changes the detection parameter from indirect chemical measurements to direct electrical potential measurements. By using ion-selective electrodes that measure voltage potentials generated by nitrate ion concentration gradients, the system achieves rapid, real-time detection without requiring the time-consuming chemical reactions of traditional methods.
2Productivity
If ion microelectrode detection is used, then detection speed is improved, but instrument cost increases and electrode safety becomes compromised
Solution Approach 1:
The patent implements a nested protective structure where the fragile measuring electrode is housed within a protective cavity in the detection device. The electrode can be inserted through a opening in the clamping plate to reach the plant leaf, then retracted back into the protective cavity when not in use. This nesting arrangement protects the vulnerable electrode tip from damage while maintaining detection capability.
Solution Approach 2:
The patent makes the electrode position dynamic by allowing it to move between an extended state (for detection) and a retracted state (for protection). The electrode support mechanism enables the measuring electrode to be pushed out through the clamping plate opening during measurement, then pulled back into safety when detection is complete, adapting the electrode's position to operational needs.
3Measurement precision
If exposed microelectrode detection is used, then detection accuracy is improved, but detection cost increases due to electrode vulnerability
Solution Approach 1:
The patent protects the expensive and fragile measuring electrode by nesting it within a protective cavity structure. The electrode is housed in a cavity formed by the upper and lower clamping plates, with an opening that allows insertion during detection. This protective enclosure prevents damage to the vulnerable electrode tip, reducing replacement costs and improving device reliability.
4Measurement precision
If large-scale detection systems are used, then detection accuracy is improved, but portability decreases
Solution Approach 1:
The patent divides the detection system into compact, modular components: a handheld detection device containing the microelectrode, signal processing circuitry, and power source, separate from the plant being measured. This segmentation allows the detection system to be portable and hand-held while maintaining accuracy, as the microelectrode can be directly inserted into plant leaves without requiring large external equipment.
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
The device reduces detection costs, enhances accuracy, and ensures the safety of the measuring electrode by allowing it to retract after use, enabling real-time, nondestructive analysis of nitric nitrogen levels in plants.
Implementation Method 1
a measuring electrode 14 passes through the spring 13 and is fixed to the center position of the electrode support 3
Implementation Method 2
the belt pulley A (2) drives the cam (12) to rotate through the transmission shaft A (1), thereby causing the electrode support (3) to move up and down
Implementation Method 3
one end of the spring (13) is fixed to a concave surface in the middle of the concave platform (4), while the other end is fixed to a center position of the electrode support (3)
Implementation Method 4
the belt pulley A (2) is connected with the belt pulley B (10) through the belt (5)
Data Source
AI summary
A portable device for detecting the nutrition level of a plant includes an outer casing and a detection circuit. The outer casing includes belt pulleys, a cam, upper and lower clamping plates. The detection circuit is arranged in the outer casing and realizes an electric signal processing function and a display function. The portable device for detecting the nutrition level of the plant has the following beneficial effects: the device can be used for analyzing whether nutrient elements in crops are deficient or excessive, which is taken as the basis for accurate fertilization, and the device has low detection cost, high real-time capability, small size and is portable.