Dynamic Threshold Adjustment for Gas Concentration Detection in Glass Bottles
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Solution Overview
Problem
Current gas concentration detection methods in glass bottles face accuracy and stability issues due to optical noise from the glass bottle wall, system instrument noise, and environmental fluctuations, particularly in real-time background-deducting nonlinear correction, which are not effectively addressed by existing methods that require standard bottles for noise deduction.
Innovation Solution
A method for detecting gas concentration in glass bottles using dynamical threshold adjustment, where second harmonic peaks are dynamically updated based on real-time data to eliminate background interference, allowing for high-precision detection without the need for standard bottles or gas absorption cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If standard bottles are added at intervals on the production line to detect background noise, then the accuracy of concentration measurement is improved, but the productivity of the production line is reduced
Solution Approach 1:
The system uses the medicinal glass bottles themselves to carry out background detection by treating bottles with known good sealing as self-standards, eliminating the need for separate standard bottles. The detection system automatically identifies and uses suitable bottles for background calibration, thereby maintaining measurement accuracy without reducing production capacity.
Solution Approach 2:
The detection system serves dual purposes: it performs both quality inspection of medicinal bottles and background noise calibration using the same detection apparatus and bottle samples, eliminating the need for dedicated standard bottles and reducing system complexity.
2Stability of the object's composition
If background noise is deducted using pre-collected spectral data, then the measurement stability is improved, but the reliability of detection is reduced due to time difference
Solution Approach 1:
The system dynamically updates background noise characteristics in real-time during production, continuously adapting to environmental changes. Instead of using static pre-collected data, the background model is continuously refined using recent measurement data, ensuring both stability and reliability of detections.
Solution Approach 2:
The system implements feedback mechanisms where detection results are used to continuously update and refine the background noise model. This closed-loop approach ensures that the background subtraction remains accurate despite environmental variations, maintaining both stability and reliability.
3Measurement precision
If wavelength modulation spectroscopy is used for oxygen concentration detection, then the detection capability is improved, but the influence of background fluctuation increases
Solution Approach 1:
The system extracts and separates the background noise component from the total signal by using spectral subtraction techniques. By identifying and removing the background contribution, the system isolates the true oxygen absorption signal, thereby maintaining detection capability while reducing background influence.
Solution Approach 2:
The system performs preliminary background characterization before actual oxygen concentration measurement by collecting spectral data from bottles with known good sealing. This preliminary background model is then used to correct subsequent measurements, eliminating background fluctuations before they affect the final results.
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
This method improves detection accuracy by dynamically adjusting thresholds to account for environmental changes, reducing errors caused by background interference and enabling real-time detection in open environments, thus enhancing the reliability and efficiency of glass bottle acceptance examinations.
Implementation Method 1
by using the wavelength modulation spectroscopy (WMS) detection method in the current environment, second harmonic peaks P0, Pa, PX in the glass bottle are respectively acquired under the concentrations of 0%, a%, X%
Data Source
AI summary
A method for detecting gas concentration in a glass bottle with dynamical threshold adjustment is provided includes acquiring second harmonic peaks P0, Pa, PX in the glass bottle, calculating absolute values of the differences between P0 and Pa, as well as between P0 and PX, and performing quality inspection on a glass bottle to be detected. The performing includes collecting the second harmonic peaks for the glass bottle to be detected, calculating a mean PL of elements in the current queue L, updating the second harmonic peak Pa and the second harmonic peak PX, collecting second harmonic peaks for a current glass bottle to be detected, and determining whether the current glass bottle to be detected is an acceptable medicinal bottle based on the updated data and the collected second harmonic peaks.