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Autocorrection near-infrared diffuse reflectance detection system and method

A detection system and automatic calibration technology, applied in measurement devices, material analysis by optical means, instruments, etc., can solve the problems of low measurement accuracy, waste of time and money, and inability to truly achieve online detection, and achieve near-infrared spectroscopy. Accuracy, improved stability and the effect of measurement accuracy

Inactive Publication Date: 2017-05-31
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Application Information

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Problems solved by technology

[0006] Therefore, in the measurement process, it is necessary to collect reference spectra and background spectra to correct the measured reflectance and absorbance. In the actual measurement process, especially when collecting near-infrared diffuse reflectance spectroscopy, effective spectral correction cannot be performed, resulting in The measurement accuracy is not high, and some of them need to be manually corrected on site every once in a while, resulting in a waste of time and money, and it is impossible to truly realize online detection

Method used

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  • Autocorrection near-infrared diffuse reflectance detection system and method
  • Autocorrection near-infrared diffuse reflectance detection system and method
  • Autocorrection near-infrared diffuse reflectance detection system and method

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Embodiment 1

[0041] Such as Figure 1-3 As shown, an automatic correction near-infrared diffuse reflectance detection system includes an optical system, the optical system includes a light source system and a spectrum collection system, the light source system is located around the spectrum collection system, and the spectrum collection system is located directly above the sample to be measured .

[0042] The light source system includes a near-infrared light source 1 and an optical filter 2. The near-infrared light source 1 passes through the optical filter 2 to eliminate unnecessary wave bands. Optimally, the light source system includes multiple light sources, which are evenly distributed around the spectrum collection system, thus reducing the impact of near-infrared light source fluctuations in a single light source system on the process of near-infrared diffuse reflectance detection.

[0043] The spectrum collection system includes a spectrum collection window 5 , an optical collect...

Embodiment 2

[0049]A detection method using an automatic correction near-infrared diffuse reflectance detection system, the system is consistent with the connection mode and working principle described in Embodiment 1.

[0050] The method of using the near-infrared diffuse reflectance detection system of automatic correction, its steps are as follows:

[0051] (1) Start the motor.

[0052] (2) The motor drives the calibration head through the moving shaft to completely block the spectrum collection window 5 by the partition. At this time, the spectrum collection system is completely isolated from the light source, and the background spectrum is collected.

[0053] When the correction head moves to figure 1 position, the partition plate 6 of the correction head is close to the spectrum collection window 5, and the near-infrared light 15 emitted by the light source is blocked from the spectrum collection system, and the background spectrum 13 generated at this time is coupled into the opti...

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Abstract

The invention discloses an autocorrection near-infrared diffuse reflectance detection system and method. The detection system comprises an optical system. The optical system comprises a light source system and a spectrum collecting system. The spectrum collecting system comprises a spectrum collecting window. The light source system is located around the spectrum collecting system. The spectrum collecting system is located right above a sample to be detected. The detection system also comprises a correction system. The correction system comprises a correction head, a movement shaft and a motor. The correction head comprises a partition plate and a white board. Through the movement shaft, the motor drives the partition plate and the white board to orderly pass through a position under the spectrum collecting window. The size of the spectrum collecting window is smaller than the size of the partition plate. The detection method comprises adjusting the position of the correction head by the motor to obtain a background spectrum, a reference spectrum and an original spectrum and calculating the near infrared absorption spectrum so that autocorrection of the background spectrum and the reference spectrum is realized and long-distance measurement of the sample is realized.

Description

technical field [0001] The invention relates to the technical field of automatic correction of near-infrared diffuse reflection spectrum, in particular to an automatic correction near-infrared diffuse reflection detection system and detection method. Background technique [0002] The near-infrared spectroscopy and Raman spectroscopy techniques in the optical property analysis method can conduct non-destructive analysis of samples, and have the characteristics of non-contact, non-destructive, high detection sensitivity, short time, small amount of samples required and no need for sample preparation. , will not cause chemical, mechanical, photochemical and thermal decomposition of the sample during the analysis process, and is one of the research hotspots in the field of analytical science. In recent years, near-infrared spectroscopy technology has made great progress in agriculture, medicine, food and other industries. There have been researches on the application of near-inf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/892
CPCG01N21/892
Inventor 王琦吴跃进刘晶范爽林晏清刘斌美余立祥倪晓宇周子军杨阳
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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