Biomimetically ridged press roller（BRPR） and biomimetically polyhedral press roller（BPPR） were designed in prior work. Meanwhile, hydrophobic material（ultra high molecular weight polyethylene（UHMWPE） and enamel coating） were applied and compared with steel Q235. Soil bin results showed that biomimetic rollers could reduce soil adhesion and resistance. Future investigation under real in-field soil conditions was needed. The present study was conducted to test effects of biomimetic press roller type, material, velocity and packing force on compaction characteristics. Conventional press roller（CPR） was used as a reference. Field tests were designed at velocities of 0.64 m·s-1 and 1.04 m·s-1 and packing forces of 300 N, 500 N and 700 N. Traction resistance（TR）, soil bulk density（SBD）, soil moisture content（SMC）, emergence rate（ER） and percent change of plant spacing（PCPS） were measured. The packing force was the most significant factor affecting each index. For all rollers, TR, SBD, ER and PCPS increased with packing force, while the loss of SMC decreased. TR and SBD decreased with velocity. All rollers can achieve proper SBD for corn seeds. Biomimetic press roller type had significant effect on TR, PCPS and SMC of May 12. Evaporation rate of SMC, PCPS, and TR of BRPR was lower than that of BPPR. Compared with CPR, not only evaporation rate of SMC and PCPS of all biomimetic rollers was obviously decreased, but ER was increased. Except for the BPPR using Q235, TR of the other biomimetic rollers was lower than CPR. BRPR decreased TR by 2.13%-22.30%, while BPPR decreased by 0.35%-18.59%. Moreover, TR of biomimetic roller using Q235 was the highest, then was UHMWPE, lowest was enamel coating. BRPR decreased PCPS by 19.46%-48.34%, while BPPR decreased by 9.69%-36.99%. Biomimetic rollers increased ER by 2.17%-11.36%. By May 27, SMC of biomimetic press rollers was 4.21%-7.75% higher than CPR when packing force was 700 N.
类型: 国际会议
作者: Qingzhu Zhang,Yunjie Xu,Bing Li,Xun Guan,Jinbo Zhang,Mo Li,Jin Tong
来源: 第六届国际仿生工程学术大会暨2019年自然启迪科技国际研讨会 2019-09-23
年度: 2019
分类: 基础科学,工程科技Ⅰ辑
专业: 生物学,材料科学
单位: School of Engineering, Huzhou University,College of Mechanical Engineering, Jiamusi University,Key Laboratory of Bionic Engineering(Ministry of Education), Jilin University
分类号: Q811;TB391
DOI: 10.26914/c.cnkihy.2019.063827
页码: 210
总页数: 1
文件大小: 136k
本文来源: https://www.lunwen90.cn/article/f8b14ad807cca172e2114997.html