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Near-infrared detection method for components of HTPB (hydroxyl-terminated polybutadiene) propellant slurry

A near-infrared detection and propellant technology, which is applied in the direction of material analysis, measurement device, analysis material, etc. by optical means, can solve the complex characteristics of solid propellant butylated hydroxyl slurry samples, and the near-infrared of solid propellant butylated hydroxyl slurry. Detecting difficulties in detection, weak spectral intensity, etc., to achieve the effect of realizing process quality stability and uniformity control, avoiding unnecessary waste and high analysis efficiency

Inactive Publication Date: 2018-05-11
XIAN AEROSPACE CHEM PROPULTION PLANT
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Problems solved by technology

Since the near-infrared technology is a non-destructive test, the proportion of solid components is as high as ~90%, resulting in microscopic non-uniformity, the darker color of the sample makes the spectral intensity very weak, and the system composed of more than ten components forms a solid propellant D The complexity of sample characteristics of hydroxyl syrup has a serious adverse effect on the prediction accuracy of the model, making the near-infrared detection of solid propellant hydroxybutyrate syrup a detection difficulty

Method used

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  • Near-infrared detection method for components of HTPB (hydroxyl-terminated polybutadiene) propellant slurry
  • Near-infrared detection method for components of HTPB (hydroxyl-terminated polybutadiene) propellant slurry
  • Near-infrared detection method for components of HTPB (hydroxyl-terminated polybutadiene) propellant slurry

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Experimental program
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Embodiment 1

[0067] Step 1. Create a sample library. A sample library was established by collecting samples of hydroxybutyl propellant slurry. The samples are obtained by means of laboratory preparation and production site sampling according to conventional methods, and the obtained samples are used to establish a calibration set and a verification set respectively.

[0068] In this embodiment, the sample set has 101 samples, of which 93 samples are used to establish a calibration set, and 8 samples are used to establish a verification set.

[0069] Step 2. Collect the near-infrared diffuse reflectance spectrum of each sample. Near-infrared diffuse reflectance spectra of the samples were collected with a Fourier transform infrared spectrometer.

[0070] The instruments used are Nexus 670 Fourier transform near-infrared spectrometer, diffuse reflectance integrating sphere device, OMNIC signal acquisition software and TQ analyst data processing software from American Thermo Nicolet Company...

Embodiment 2

[0120] Step 1. Create a sample library. A sample library was established by collecting samples of hydroxybutyl propellant slurry. The samples are obtained by means of laboratory preparation and production site sampling. The sample set has 99 samples, of which 91 samples are used to build the calibration set and 8 are used to build the validation set.

[0121] Step 2. Collect the near-infrared diffuse reflectance spectrum of each sample. Near-infrared diffuse reflectance spectra of the samples were collected with a Fourier transform infrared spectrometer.

[0122] The instruments used are Nexus 670 Fourier transform near-infrared spectrometer, diffuse reflectance integrating sphere device, OMNIC signal acquisition software and TQ analyst data processing software from American Thermo Nicolet Company.

[0123] When collecting the near-infrared diffuse reflectance spectrum of the sample, divide the first sample into three parts, put them into the rotating cup and spread them to...

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Abstract

The invention provides a near-infrared detection method for components of HTPB (hydroxyl-terminated polybutadiene) propellant slurry. A near-infrared spectrum detection technology is adopted, the influence of characteristics of an HTPB propellant slurry sample on test accuracy is solved by selecting rotatable diffuse reflection sampling technology and multipoint acquisition technology; the relationship between absorbance and component content is established with stoichiometry by selection of analysis bands and determination of optimal modeling parameters including optimal variable number and the like; a quantitative component content method is formed by establishing an accurate correction model; quantitative results of multi-component content of a to-be-detected sample can be given simultaneously by one near-infrared spectrum of the detected sample according to the relationship between absorbance and content. Rapid detection of the content of the binder HTPB, a plasticizer DOS and an oxidizing agent AP in the propellant slurry is realized; the method has the characteristics of being fast, efficient and nondestructive in detection, the change of the component concentration of the slurry in the charge production process can be found timely, stability and uniformity of the process quality are controlled, and unnecessary waste is avoided.

Description

technical field [0001] The invention relates to a propellant component charging detection method, in particular to a near-infrared rapid detection method for the propellant slurry component of hydroxybutyrate propellant, which is used to detect the binder HTPB, the plasticizer DOS and the oxidant AP in the solid propellant The rapid detection of the content provides an important guarantee for the quality of the engine charge. Background technique [0002] The content of propellant slurry components is an important control link in the charging process of solid motors, and it directly affects various performance indicators of the propellant. The fluctuation of binder content has a decisive influence on the mechanical properties of propellants. Plasticizer can not only reduce the viscosity of uncured propellant slurry, lower the glass transition temperature of propellant, but also the fluctuation of its content plays an important role in improving the low temperature mechanica...

Claims

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Application Information

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IPC IPC(8): G01N21/359G01N21/3577
CPCG01N21/359G01N21/3577G01N2021/3595
Inventor 杨英晁建会郭琪马军燕
Owner XIAN AEROSPACE CHEM PROPULTION PLANT
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