A portable near-infrared spectroscopy detection system

Abstract

The invention relates to the technical field of infrared spectrum detection, in particular to a portable near-infrared spectrum detection system. The system comprises a shell, an acquisition window, a detection light source, a light splitting device and a detector, wherein the acquisition window, the detection light source, the light splitting device and the detector are sequentially installed in the shell from bottom to top. The shell is further internally provided with a converter and a power supply device. The output end of the detector is connected with the input end of the converter, and the power supply device is connected with a detection light source, the detector and the converter. The system further comprises a sample pond which is installed on the acquisition window. The sample pond is divided into a sample placemat part and a fixing part, a blocking piece is arranged in the sample placement part, a through hole is formed in the center of the blocking piece, and the fixing part is fixedly arranged on the acquisition window. The light splitting device is a linear gradually changed optical filter. The portable near-infrared spectrum detection system greatly improves detection precision under the condition that equipment size and weight are not increased, and the problem that model transport is difficult is solved.

Description

technical field [0001] The invention relates to the technical field of infrared spectrum detection, in particular to a portable near-infrared spectrum detection system. Background technique [0002] Near Infrared (NIR) is an electromagnetic radiation wave between visible light (Vis) and mid-infrared (MIR). The American Society for Testing and Materials (ASTM) defines the near-infrared spectral region as the region of 780-2526nm. It is the first non-visible light region discovered by humans in the absorption spectrum. The near-infrared spectrum region is consistent with the combined frequency of the vibration of hydrogen-containing groups (OH, NH, CH) in organic molecules and the absorption region of all levels of frequency multiplication. By scanning the near-infrared spectrum of the sample, the hydrogen-containing groups of organic molecules in the sample can be obtained. The characteristic information of the cluster, and the use of near-infrared spectroscopy to analyze sa...

AI Technical Summary

Problems solved by technology

The purpose of quantitative non-destructive testing is to know the content of various elements in this sample, but the portable near-infrared detection equipment for drug sample detection in the prior art still has the following problems: 1. Drug samples have special characteristics, such as flakes and capsules etc. Due to the small contact surface of the optical fiber probe during spectrum collection, representative sample information was not collected; 2. For qualitative analysis and detection, the current domestic and foreign equipment of the same type has low precision, resulting in a large error between the detection results and the actual results. 3. The detection results of portable near-infrared detection equipment in the prior art are still unstable, resulting in unusable results; 4. Since the near-infrared detection equipment must be calibrated before use, the principle of calibration is based on the different properties and accuracy of the equipment. The natural light intensity is collected, and the calibration module is used to collect the maximum absorption rate to determine the integration time. However, due to the natural light factor of the existing portable near-infrared detection equipment, there are many uncertain factors in the calibration, and the detection results cannot be obtained accurately.

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