In China,tea products made from fresh leaves characterized by one leaf with one bud(1L1B)are classified as“Famous Tea”,which has better taste and higher economic value,but suffers from a labor shortage.Aiming at pic...In China,tea products made from fresh leaves characterized by one leaf with one bud(1L1B)are classified as“Famous Tea”,which has better taste and higher economic value,but suffers from a labor shortage.Aiming at picking automation,existing studies focus on visual detection of 1L1B,but algorithm validation is limited to a specific variety of tea sprouting in a certain harvest season at a certain location,which limits the engineering application of developed tea picking robots working in various natural tea fields.To address this gap,a deep learning model DMT(detecting multispecies of tea)based on YOLOX-S was proposed in this paper.The DMT network takes YOLOX-S as a baseline and adds ECA-Net to the CSP Darknet and FPN of YOLOX-S.The average precision(AP),precision,and recall of DMT are 94.23%,93.39%,and 88.02%,respectively,for detecting 1L1B sprouting in spring;93.92%,93.56%,and 87.88%,respectively,for detecting 1L1Bsprouting in autumn.These experimental results are better than those of the five current object detection models.After fine-tuning the DMT network with another dataset composed of multiple tea varieties,the DMT network can detect 1L1B for different varieties of tea in multiple picking seasons.The results can promote the engineering application of picking automation of fresh tea leaves.展开更多
The effects of three fixation methods( steaming,blanching and microwave fixation) on chemical composition and sensory quality of Lycium ruthenicum bud-tea were investigated.The results showed the fixation technique( t...The effects of three fixation methods( steaming,blanching and microwave fixation) on chemical composition and sensory quality of Lycium ruthenicum bud-tea were investigated.The results showed the fixation technique( the leaf weight 3 g/cm^2,the time 1.5 min,and the temperature 100 ℃) was the best,which was beneficial to the conservation of free amino acid and soluble sugar in L.ruthenicum bud-tea.The loss of chlorophyll was limited,and the score of sensory quality review was higher.展开更多
三维定位是实现采茶机器人精采名优茶的关键技术,对保证机器人采摘茶叶高品质和高产量具有重要的意义,传统的SGBM(Semi-Global Block Matching)算法存在匹配效果差,还原效果不高等问题。本文提出SGBM算法与WLS(Weighted Least Squares)...三维定位是实现采茶机器人精采名优茶的关键技术,对保证机器人采摘茶叶高品质和高产量具有重要的意义,传统的SGBM(Semi-Global Block Matching)算法存在匹配效果差,还原效果不高等问题。本文提出SGBM算法与WLS(Weighted Least Squares)的融合算法,使得茶叶嫩芽深视图轮廓更清晰、前后景分层更明显、还原度更高,实际定位效果更精准。实验表明:采用SGBM与WLS融合算法能够将定位误差控制在1 mm左右,约是同等条件下其他传统融合算法精确度的7倍,提高了机器人采摘茶叶时定位的工作效率,为后续实现采茶机器人智能化提供一定帮助。展开更多
基金the National Natural Science Foundation of China(Grants No.U23A20175No.52305289)+1 种基金“Pioneer”and“Leading Goose”R&D Program of Zhejiang(Grant No.2022C02052)China Agriculture Research System of MOF and MARA and Basic.
文摘In China,tea products made from fresh leaves characterized by one leaf with one bud(1L1B)are classified as“Famous Tea”,which has better taste and higher economic value,but suffers from a labor shortage.Aiming at picking automation,existing studies focus on visual detection of 1L1B,but algorithm validation is limited to a specific variety of tea sprouting in a certain harvest season at a certain location,which limits the engineering application of developed tea picking robots working in various natural tea fields.To address this gap,a deep learning model DMT(detecting multispecies of tea)based on YOLOX-S was proposed in this paper.The DMT network takes YOLOX-S as a baseline and adds ECA-Net to the CSP Darknet and FPN of YOLOX-S.The average precision(AP),precision,and recall of DMT are 94.23%,93.39%,and 88.02%,respectively,for detecting 1L1B sprouting in spring;93.92%,93.56%,and 87.88%,respectively,for detecting 1L1Bsprouting in autumn.These experimental results are better than those of the five current object detection models.After fine-tuning the DMT network with another dataset composed of multiple tea varieties,the DMT network can detect 1L1B for different varieties of tea in multiple picking seasons.The results can promote the engineering application of picking automation of fresh tea leaves.
基金Supported by Science and Technology Innovation Fund Project of Ningxia Academy of Agriculture and Forestry Sciences(NKYJ-17-18)
文摘The effects of three fixation methods( steaming,blanching and microwave fixation) on chemical composition and sensory quality of Lycium ruthenicum bud-tea were investigated.The results showed the fixation technique( the leaf weight 3 g/cm^2,the time 1.5 min,and the temperature 100 ℃) was the best,which was beneficial to the conservation of free amino acid and soluble sugar in L.ruthenicum bud-tea.The loss of chlorophyll was limited,and the score of sensory quality review was higher.