Compartmentalized Piezoelectric Sensor for Rapid Foreign Substance Detection
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Solution Overview
Problem
Current electronic nose and tongue devices are inefficient in quickly and effectively identifying foreign substances in gas or liquid media, requiring improvements in detection speed and accuracy.
Innovation Solution
A sensing system with multiple sensor units, each with a compartmentalized measurement unit and piezoelectric crystal resonators, configured to generate response signals indicative of foreign substances, utilizing a sample feeding unit and control system for rapid analysis and data processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional electronic nose and tongue devices are used for detecting foreign substances, then the detection process can be completed, but the detection time is excessive and efficiency is low
Solution Approach 1:
The system divides the detection task into multiple parallel sensor units, each equipped with different sensor elements that can simultaneously detect different foreign substances. This segmentation allows concurrent detection of multiple substances rather than sequential analysis, dramatically improving detection efficiency and reducing overall detection time.
Solution Approach 2:
The system performs preliminary concentration of foreign substances in the sample medium before detection. By pre-concentrating the target substances, the system reduces the time required for actual detection and increases sensitivity, thereby improving overall detection efficiency while reducing the time needed for each detection cycle.
2Measurement precision
If multiple sensor elements are used to improve detection accuracy, then identification capability is enhanced, but device complexity increases
Solution Approach 1:
The system employs a universal platform architecture where multiple sensor elements share common control and signal processing circuits. Each sensor unit can detect different foreign substances, and the same electronic infrastructure supports all sensor types, reducing overall system complexity while maintaining high detection accuracy through multi-substance capability.
Solution Approach 2:
The system changes the parameters of sensor elements (such as sensitivity, selectivity, and response characteristics) to optimize detection accuracy for different foreign substances. By adjusting sensor parameters rather than adding complex hardware for each substance, the system achieves high measurement precision while controlling device complexity.
3Speed
If sensor elements are exposed directly to the sample medium, then detection response is obtained, but cross-contamination between different sensor elements occurs
Solution Approach 1:
The system introduces individual compartments for each sensor element, physically separating them while maintaining controlled access to the sample medium. This segmentation prevents cross-contamination between sensor elements while allowing each to respond to foreign substances independently, thus preserving both detection speed and reliability.
Solution Approach 2:
The compartment structure acts as an intermediary between the sample medium and sensor elements. It allows the sample to reach each sensor element through controlled pathways while preventing direct contact between different sensor elements, thereby eliminating cross-contamination risks while maintaining rapid detection response.
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 system enables rapid identification of foreign substances in both air vapor and liquid media, reducing detection time to under 12 seconds with high accuracy, suitable for various applications including explosives detection and environmental monitoring.
Implementation Method 1
The sensor element is a piezoelectric crystal resonator characterized by a certain resonance frequency value and carrying reactive molecules of a kind capable of interacting with at least one specific foreign material to yield a reaction product that effects a change in the resonance frequency of the crystal resonator
Implementation Method 2
the crystal resonator is characterized by a certain resonance frequency value and carrying reactive molecules of a kind capable of interacting with at least one specific foreign material to yield a reaction product that effects a change in the resonance frequency of the crystal resonator
Data Source
AI summary
A sensing unit is presented for use in identifying at least one foreign substance in a region of interest. The sensing unit comprises at least one measurement unit, which comprises one or more sensor elements each configured and operable to be responsive to at least one foreign substance in the vicinity thereof. Each sensor element is mounted in its own compartment having an inlet and an outlet thus defining an environmental region in the vicinity of the sensor element separated from the surroundings of the compartment.