Abstract: 【Objective】 The purpose of this research is to solve the problems such as factors affecting the quality of mutton near-infrared spectral collection quality and so on.【Method】 Xinjiang mutton was taken as the object in the study, and the effects of different light sources, fiber parameters, instrument detection time, acquisition distance and acquisition parameters on the spectral collection quality were discussed.【Result】 The results showed that the VIVO light source was better than the HL-2000 light source, by use of light source with higher power for the well controlled light source could improve the spectral repeatability and reduce the spectral noise; The spectral reflectance was increased with increasing diameter or number of receiving fiber core. With the increase of detection time, the baseline shift of the spectrum was more serious, and each wavelength point moved towards the short wave. With the increase of acquisition distance, the spectral reflectance was increased first and then decreased. The longer integral time, the better spectral quality. With the increase of smooth points and average times appropriately, the spectral quality was increased. 【Conclusion】 Based on the experiments, the influence of various factors on the spectral quality was analyzed, which provided a certain reference for improving the instrument and detection conditions.

Key words: near-infrared spectra; spectral quality; influencing factors; experiment and analysis

摘要： 【目的】研究羊肉近红外光谱采集质量影响因素。【方法】以新疆羊肉为研究对象,研究不同光源、光纤参数、仪器检测时间、采集距离、采集参数等对光谱采集质量的影响。【结果】VIVO光源性能优于HL-2000光源,功率较大,温控好的光源能提高光谱重复性、减小光谱噪声;增加接收光纤芯径或数目,光谱反射率增大;随着仪器检测时间增长,光谱基线漂移越严重且各波长点向短波方向移动;随着采集距离的增加,光谱反射率先增大再减小;积分时间变长,光谱质量变好;适当增加平滑度和平均次数光谱质量较好。【结论】分析了各因素对光谱的影响,为改进仪器和检测条件提供了一定的参考依据。

关键词: 羊肉, 近红外光谱, 光谱质量, 影响因素