光谱学与光谱分析, 2011, 31 (4): 975, 网络出版: 2011-05-30
近红外光谱用于杉木木材强度分等的研究
Study on the Wood Grading by Near Infrared Spectroscopy
摘要
利用近红外光谱技术对木材强度分等进行了研究。 选择1 000～1 400 nm波段, 结合偏最小二乘法, 在木材强度和近红外光谱数据间建立了校正模型, 校正模型的相关系数(r)为0.89, 校正标准误差(SEC)为6.30 MPa。 利用校正模型对35个未知样品的强度进行预测, 根据近红外预测值和实测值分别对木材样品进行分等, A级预测的准确率为75.0%, B级准确率为91.3%, C级准确率为80.0%, 总正确率为88.6%。 研究结果表明, 近红外光谱技术可以应用在无疵小试样的木材快速分等中。
Abstract
The present paper discussed wood grading according to modulus of rupture (MOR) by near infrared (NIR) spectroscopy.The calibration model was built between MOR of wood and NIR data in the range of 1 000～1 400 nm with partial least square regression (PLS).The correlation coefficient (r) was 0.89 and the standard error of calibration (SEC) was 6.30 MPa.The MOR of 35 unknown samples was predicted using the model.Wood samples were graded according to their predicted values and true values.The rate of right prediction for A, B and C was 75.0%, 91.3% and 80.0% respectively, and the whole rate of right prediction was 88.6%.The result has proved that near infrared spectroscopy is a fast method for the determination of wood grade in the small clear samples.
王晓旭, 黄安民, 杨忠, 杨瑶. 近红外光谱用于杉木木材强度分等的研究[J]. 光谱学与光谱分析, 2011, 31(4): 975. WANG Xiao-xu, HUANG An-min, YANG Zhong, YANG Yao. Study on the Wood Grading by Near Infrared Spectroscopy[J]. Spectroscopy and Spectral Analysis, 2011, 31(4): 975.
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