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基于点云变形分析的羊胴体最佳宰后成熟时间确定方法
张一驰,王树才,郝广钊,赵世达,孙胜斌
0
(华中农业大学工学院,武汉 430070;青岛建华食品机械制造有限公司,青岛 266300)
摘要:
为探索羊胴体最佳宰后成熟时间在实际生产过程中应用的方法,以变形检测技术为主要手段,研究通过观测羊胴体宰后成熟过程中的变形情况来确定胴体最佳宰后成熟时间的可行性。以同批宰杀的杜泊绵羊和巴美肉羊胴体作为试验样本,宰杀后静置于恒温排酸间并在宰后一定时间点使用激光扫描仪采集整只胴体的三维点云模型,经过预处理和配准后借助三维色谱图确定胴体上变形显著的感兴趣区域,计算其变形量的同时测定其肉样的pH值和水分含量随时间的损失率两项指标,通过分析两项指标初始值的分布性和一致性筛选用于相关性分析样本集,通过相关系数判断其变形量与上述两项指标之间变化的相关程度。结果表明,试验样本在感兴趣区域的变形量与上述两项指标在宰后成熟过程中变化的相关系数均分别达到0.875和0.944以上,呈现高度相关性。结合从传统方法中得出的研究结论,验证了通过外部观测宰后胴体的变形情况来判断胴体最佳宰后成熟时间的可行性。
关键词:  羊胴体  最佳成熟时间  激光点云  变形监测  相关性分析
DOI:10.13610/j.cnki.1672-352x.20220325.007
基金项目:国家“十三五”重点研发计划项目(2018YFD0700800)资助。
A method for determining the optimal maturity time of sheep carcass based on point cloud deformation analysis
ZHANG Yichi,WANG Shucai,HAO Guangzhao,ZHAO Shida,SUN Shengbin
(College of Engineering, Huazhong Agricultural University, Wuhan 430070;Qingdao Jianhua Food Machinery Manufacturing Co., Ltd., Qingdao 266300)
Abstract:
In order to explore the application method of the optimal maturity time of sheep carcass in the production process, we used deformation detection technology as the main method to verity the feasibility in determining the optimal carcass maturity time by observing the deformation of the carcass during the maturation process. We used the carcass of Dorper sheep and Bamei mutton sheep slaughtered in the same batch as the test samples, collected the point cloud model of the whole carcass with laser scanner at 10 time points after slaughtering, determined the region of interest with significant deformation on the carcass with the three-dimensional chromatogram after preprocessing and registration, and then calculated the deformation and measured the pH value of the meat sample and the water loss rate over time. We selected the sample set used for correlation analysis through the distribution and consistency analysis of the original data of two indicators, after that, we analyzed the correlation degree between the above two indicators with correlation coefficient. The results showed that the correlation coefficients between deformation of the region of interest of two indicators were above 0.875 and 0.944, respectively, indicating a high degree of correlation. Combined with the research conclusions obtained by traditional methods, the results verify the feasibility of judging the optimal maturity time by observing the deformation of the carcass after slaughtering.
Key words:  sheep carcass  optimal maturity time  laser point cloud  deformation analysis  correlation analysis

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