Device and method for detecting material mixing uniformity by means of near-infrared technology based on MEMS(micro-electro mechanical system)

Abstract

The application discloses a device and a method for detecting material mixing uniformity by means of near-infrared technology based on MEMS(micro-electro mechanical system), belonging to the technicalfield of material mixing uniformity detection. The system comprises a window structure and a near-infrared spectroscopy based on the MEMS, wherein the window structure is installed on the side wall of a mixing tank, and the near-infrared spectroscopy is installed at the outer side of the window structure. The method for detecting the material mixing uniformity of the mixing tank comprises the following steps: 1, detecting the mixed material in the mixing tank in real time through the window structure by using the near-infrared spectroscopy based on the MEMS, and continuously carrying out spectral acquisition to obtain spectral variables so as to further obtain a plurality of absorbances A; 2, calculating and analyzing the absorbances A; 3, drawing a trend chart according to the analysis results obtained in the step 2; 4, analyzing the tendency chart, and if the curve of the tendency chart is lower than a uniformity limiting value (MBSD value is equal to 0.000035), judging that the material reaches a uniform state.

Description

technical field [0001] The invention relates to the field of detection of mixing uniformity, in particular to a MEMS-based near-infrared online detection device for mixing uniformity and a detection method thereof. Background technique [0002] The mixing process is an important link in the production of solid preparations in the industry. If the mixing time is too short, it will cause uneven mixing and affect product quality; if the mixing time is too long, it will cause waste of energy. Based on the above, the existing method for detecting the degree of mixing of mixed materials is to manually collect several samples in each batch of mixing, and carry out detection according to the quality regulations. Reflect the instantaneous change trend of the mixing process and judge the end point of mixing uniformly in a timely and effective manner. [0003] Near-infrared spectrum refers to electromagnetic waves between mid-infrared and near-infrared, with a wavelength of 780-2526nm...

AI Technical Summary

Problems solved by technology

Although the method described in this patent document uses an advanced near-infrared spectrometer to detect the mixing degree of the mixture to a certain extent, it is still unavoidable to manually take out the sample in the mixer and scan the sample for analysis. The means are relatively backward, and it is impossible to get rid of the steps of manual extraction of samples. It still takes a long time and high cost, and it is difficult to reflect the instantaneous change trend of the mixing process in real time and provide timely and effective feedback to the mixing process.

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