Tablet Press NIR Measurement for Real-Time Quality Control
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Solution Overview
Problem
Current tablet manufacturing processes lack real-time quality control, particularly for determining the active ingredient content and hardness of tablets, leading to potential 'out-of-specification' products due to slow and destructive analysis methods, which are not suitable for high-speed production environments.
Innovation Solution
Integration of a near-infrared (NIR) measuring device within the tablet press that uses a radiation source, spectrometer, and photodiode array to quantify substance content and determine tablet hardness in real-time, enabling immediate analysis of each tablet with high precision and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If destructive mechanical strength analysis and chromatographical methods are used for quality control, then measurement precision is improved, but productivity deteriorates due to slow analysis speed
Solution Approach 1:
The patent replaces destructive mechanical strength analysis and chromatographical methods with near-infrared spectroscopy. The NIR measuring device uses radiation sources and detectors to measure tablet properties non-destructively, enabling rapid analysis without the time-consuming sample preparation and analysis steps of traditional methods.
Solution Approach 2:
The patent changes the measurement parameter from physical-chemical analysis (chromatography, mechanical strength) to optical properties in the near-infrared range. By measuring absorption spectra of tablets in the NIR region, the system achieves both high precision and fast analysis speed, resolving the contradiction between measurement quality and productivity.
2Device complexity
If random sample batch testing is performed, then device complexity is reduced, but reliability deteriorates due to inability to detect trends or out-of-specification products
Solution Approach 1:
The patent implements continuous quality control by measuring every tablet as it passes through the press using the NIR measuring device. This continuous measurement approach replaces random sampling with 100% inspection, enabling real-time detection of trends and out-of-specification products while maintaining high productivity.
Solution Approach 2:
The system incorporates feedback mechanisms where measurement results are immediately evaluated against specifications, and the data is used to monitor production trends. The evaluating device provides real-time feedback on tablet quality, enabling immediate detection and correction of production issues.
3Productivity
If spectroscopic methods are used for continuous quality check, then productivity is improved, but measurement precision deteriorates due to lower analysis speed
Solution Approach 1:
The patent optimizes the NIR measurement parameters including radiation source intensity, detector sensitivity, and spectral range to achieve both high speed and high precision. By carefully selecting the near-infrared wavelength range and optimizing the measurement geometry, the system achieves precise quantitative determination of active ingredient content at production speeds of 250,000 to 1,000,000 tablets per hour.
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 100% real-time quality control of tablets, allowing for the detection of deviations from specifications and ensuring all tablets meet predetermined criteria, even at high production rates of up to 1,000,000 tablets per hour, with analysis times under 10 milliseconds.
Implementation Method 1
at least one radiation source (29), which emits radiation in the near infrared range, for irradiation of the tablet
Implementation Method 2
a radiation receiving device contained in a measuring head (5), which receives the radiation reflected by the tablet
Implementation Method 3
a spectrometer (13) for receiving the radiation from the radiation receiving device (11) and for supplying an output signal according to the intensity of the received radiation at a number of different wavelengths
Data Source
AI summary
The tablets press according to the invention comprises an integral measuring device for the determination of the quantitative content of at least one substance in a tablet, comprising: at least one radiation source, which emits radiation in the near infrared range, for the irradiation of the tablet, a radiation receiving device contained in a measuring head, which receives the radiation reflected by the tablet, a spectrometer for receiving the radiation from the radiation receiving device and for supplying an output signal according to the intensity of the received radiation at a number of different wavelengths and a device for the quantitative determination of the content of at least one substance contained in the tablet and/or for the determination of the ratios of all or some of the contained components based on the output signal, wherein the measuring device is suitable for measuring each individual pressed tablet, and the trigger times of the measurements are correlated with the conveying speed of the tablets press.