Article(id=1312006378160489248, tenantId=1146029695717560320, journalId=1311385739772133495, issueId=1311999647825101743, articleNumber=null, orderNo=null, doi=10.6041/j.issn.1000-1298.2025.12.057, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1729353600000, receivedDateStr=2024-10-20, revisedDate=1737129600000, revisedDateStr=2025-01-18, acceptedDate=null, acceptedDateStr=null, onlineDate=1790736296453, onlineDateStr=2026-09-30, pubDate=1766592000000, pubDateStr=2025-12-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1790736296453, onlineIssueDateStr=2026-09-30, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1790736296453, creator=13701087609, updateTime=1790736296453, updator=13701087609, issue=Issue{id=1311999647825101743, tenantId=1146029695717560320, journalId=1311385739772133495, year='2025', volume='56', issue='12', pageStart='1', pageEnd='818', issueExtLink='null', onlineDate='null', pubDate='1766592000000', pubDateStr='2025-12-25', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=1, specialIssue=null, createTime=1790734691815, creator='13701087609', updateTime=1790738411040, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1312015247465083866, tenantId=1146029695717560320, journalId=1311385739772133495, issueId=1311999647825101743, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1312015247465083867, tenantId=1146029695717560320, journalId=1311385739772133495, issueId=1311999647825101743, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=623, endPage=633, ext={EN=ArticleExt(id=1312006379909514017, articleId=1312006378160489248, tenantId=1146029695717560320, journalId=1311385739772133495, language=EN, title=Particle Fertilizer Flow Microwave Signal Measurement Based on Variational Mode Decomposition and Wavelet Analysis, columnId=1311999800569066336, journalTitle=Transactions of the Chinese Society for Agricultural Machinery, columnName=Agricultural Informatization Engineering, runingTitle=null, highlight=null, articleAbstract=
The accurate measurement of granular fertilizer mass flow rate presents a significant challenge for achieving precision fertilization. Due to the complex dynamics of granular flows, traditional measurement methods often struggle to handle the resulting signals, which are typically characterized by significant noise and non-stationarity. To address this issue, a novel pre-processing algorithm for granular fertilizer flow signals acquired by a microwave sensor was proposed. Initially, a model of the fertilizer discharge pipeline was constructed and simulation experiments were conducted. These simulations determined that under conditions of a 400 mm pipeline length and 30 mm diameter, the impact of particle collisions within the pipeline on velocity was minimized. Based on these simulation results, a signal acquisition platform for granular fertilizer mass flow was established. Through analysis of the acquired flow signals, a hybrid denoising algorithm combining variational mode decomposition (VMD) and discrete wavelet transform (DWT) was innovatively proposed. Experimental results demonstrated that after processing with this algorithm, the signal-to-noise ratio of the signal was increased by 7.375 7 dB, and the root mean square error was decreased by 57%. The algorithm effectively separated the noise component from the signal, thereby significantly improving the measurement accuracy of the granular fertilizer mass flow rate. Finally, real-world vehicle tests were conducted. The processed flow signals exhibited a maximum relative error of 13.84% and a minimum relative error of 1.36%. The results confirmed that the experimental platform developed and the proposed denoising algorithm provided reliable technical support for precision fertilization.
, authors=Liwei YANG
1, Yuchen ZHANG
1, Zekai ZHAN
2, Ziyang JIN
1, Yonglin PENG
1, Yufei ZHU
2, authorsList=Liwei YANG, Yuchen ZHANG, Zekai ZHAN, Ziyang JIN, Yonglin PENG, Yufei ZHU, authorCompany=null, correspAuthors=null, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1312006385982866266, articleId=1312006378160489248, tenantId=1146029695717560320, journalId=1311385739772133495, language=CN, title=基于变分模态分解联合小波分析的颗粒肥流量微波信号测量研究, columnId=1311999800749421410, journalTitle=农业机械学报, columnName=农业信息化工程, runingTitle=null, highlight=null, articleAbstract=
针对精准农业中颗粒肥料质量流量难以精确测量的难题,提出了一种基于微波传感器采集颗粒肥料流量信号的预处理算法。首先通过仿真排肥管道结构,确定了在管道长度为400 mm、直径为30 mm的条件下,颗粒肥料在管道内的碰撞对速度的影响最小,并根据仿真结果搭建了颗粒肥料质量流量采集平台。通过对采集的流量信号进行分析,提出了一种结合变分模态分解(VMD)与离散小波变换(DWT)的复合去噪算法。试验结果表明该算法处理后的信号信噪比提高了7.375 7 dB,均方根误差降低了57%,从而显著提升了颗粒肥料质量流量的测量精度。最后实际车载试验表明,经该算法处理后的流量信号,最大相对误差为13.84%,最小相对误差为1.36%。该试验平台与算法为精准施肥提供了可靠的技术支持。
, authors=杨立伟
1, 张雨琛
1, 詹泽凯
2, 晋子杨
1, 彭永霖
1, 朱羽飞
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等. 微波传感器的技术与发展[C]//2024年全国微波毫米波会议论文汇编(下册),
2024: 3., articleTitle=微波传感器的技术与发展, refAbstract=null)], funds=[Fund(id=1312006394820264875, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1312006378160489248, awardId=32371989, language=CN, fundingSource=国家自然科学基金项目(32371989), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1312006386255496027, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1312006378160489248, xref=1., ext=[AuthorCompanyExt(id=1312006386268078940, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1312006378160489248, companyId=1312006386255496027, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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1.中国农业大学智慧农业系统集成研究教育部重点实验室,北京 100083)]), AuthorCompany(id=1312006386356159326, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1312006378160489248, xref=2., ext=[AuthorCompanyExt(id=1312006386364547935, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1312006378160489248, companyId=1312006386356159326, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2.College of Engineering, China Agricultural University, Beijing 100083, China), AuthorCompanyExt(id=1312006386372936544, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1312006378160489248, companyId=1312006386356159326, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2.中国农业大学工学院,北京 100083)])], figs=[ArticleFig(id=1312006390521103243, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1312006378160489248, language=EN, label=Fig. 1, caption=
Flowchart of velocity and concentration information obtained by wavelet mode decomposition algorithm, figureFileSmall=X/aYKLgmRWYWRwqX5H1OlQ==, figureFileBig=bqcRpn+NiRjMVp/RPueBRw==, tableContent=null), ArticleFig(id=1312006390604989324, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1312006378160489248, language=CN, label=图1, caption=
小波化模态分解算法求速度浓度信息流程图, figureFileSmall=X/aYKLgmRWYWRwqX5H1OlQ==, figureFileBig=bqcRpn+NiRjMVp/RPueBRw==, tableContent=null), ArticleFig(id=1312006390793733005, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1312006378160489248, language=EN, label=Fig. 2, caption=
Pipeline model, figureFileSmall=NnXaMqpKbr2NXLVVJdmu0Q==, figureFileBig=UCrsET82xn4vf5m4dUOBLw==, tableContent=null), ArticleFig(id=1312006390865036174, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1312006378160489248, language=CN, label=图2, caption=
管道建模, figureFileSmall=NnXaMqpKbr2NXLVVJdmu0Q==, figureFileBig=UCrsET82xn4vf5m4dUOBLw==, tableContent=null), ArticleFig(id=1312006390940533647, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1312006378160489248, language=EN, label=Fig. 3, caption=
Indoor detection system experimental platform, figureFileSmall=avTls3WRdwLtIqMo8XoZQQ==, figureFileBig=hn3BHVFVvvJxC59DKNhpZA==, tableContent=null), ArticleFig(id=1312006391011836816, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1312006378160489248, language=CN, label=图3, caption=
室内检测系统试验平台1. 肥箱 2. 排肥轴 3. 多普勒微波传感器发送端 4. 排肥管道 5. 接收装置 6. 数据采集卡 7. 电源 8. 多普勒微波传感器接收端 9. 电机驱动控制器 10. 计算机 11. 伺服电机
, figureFileSmall=avTls3WRdwLtIqMo8XoZQQ==, figureFileBig=hn3BHVFVvvJxC59DKNhpZA==, tableContent=null), ArticleFig(id=1312006391083139985, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1312006378160489248, language=EN, label=Fig. 4, caption=
Comparison of time-domain signals before and after wavelet denoising, figureFileSmall=kUDs/kO9A9lu3luClMzBVg==, figureFileBig=8FknkcOijTkGLFIZoLjntQ==, tableContent=null), ArticleFig(id=1312006391175414674, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1312006378160489248, language=CN, label=图4, caption=
小波去噪前后信号时域对比图, figureFileSmall=kUDs/kO9A9lu3luClMzBVg==, figureFileBig=8FknkcOijTkGLFIZoLjntQ==, tableContent=null), ArticleFig(id=1312006391255106451, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1312006378160489248, language=EN, label=Fig. 5, caption=
Comparison of frequency-domain signals before and after wavelet denoising, figureFileSmall=lSZ6yTDk0LSkz5NvktYeqA==, figureFileBig=+MABZMbxSzv71uudYcLzbw==, tableContent=null), ArticleFig(id=1312006391427072916, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1312006378160489248, language=CN, label=图5, caption=
小波去噪前后信号频域对比图, figureFileSmall=lSZ6yTDk0LSkz5NvktYeqA==, figureFileBig=+MABZMbxSzv71uudYcLzbw==, tableContent=null), ArticleFig(id=1312006391502570389, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1312006378160489248, language=EN, label=Fig. 6, caption=
Frequency-domain comparison of IMF components before and after denoising via VMD-DWT algorithm, figureFileSmall=/AYvtj//cP+UtbWkUG2kPw==, figureFileBig=7zKMXpf+aN1mIL8tg/DO1Q==, tableContent=null), ArticleFig(id=1312006391569679254, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1312006378160489248, language=CN, label=图6, caption=
VMD-DWT算法去噪前后各IMF分量频域对比图, figureFileSmall=/AYvtj//cP+UtbWkUG2kPw==, figureFileBig=7zKMXpf+aN1mIL8tg/DO1Q==, tableContent=null), ArticleFig(id=1312006393188680599, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1312006378160489248, language=EN, label=Fig. 7, caption=
Time-domain comparison of signal before and after VMD-DWT denoising, figureFileSmall=PyWfg8+hT2Oz/v2gaM2/3w==, figureFileBig=pbnfHlPSEL6gtMsAbYhBzg==, tableContent=null), ArticleFig(id=1312006393280955288, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1312006378160489248, language=CN, label=图7, caption=
VMD-DWT算法去噪前后信号时域对比图, figureFileSmall=PyWfg8+hT2Oz/v2gaM2/3w==, figureFileBig=pbnfHlPSEL6gtMsAbYhBzg==, tableContent=null), ArticleFig(id=1312006393373229977, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1312006378160489248, language=EN, label=Fig. 8, caption=
Comparison of signal frequency domain before and after VMD-DWT algorithm, figureFileSmall=NOadf3kOtHf8sFLYKJ5t/g==, figureFileBig=ZEfx899jz0cz6BohvZ16CQ==, tableContent=null), ArticleFig(id=1312006393465504666, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1312006378160489248, language=CN, label=图8, caption=
VMD-DWT算法去噪前后信号频域对比图, figureFileSmall=NOadf3kOtHf8sFLYKJ5t/g==, figureFileBig=ZEfx899jz0cz6BohvZ16CQ==, tableContent=null), ArticleFig(id=1312006393524224923, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1312006378160489248, language=EN, label=Fig. 9, caption=
Comparison of power spectral density before and after VMD-DWT algorithm, figureFileSmall=4+Lo9nnI1oKqZZ5R5cfBEg==, figureFileBig=4t90lMaLYQBEgvXtKGeVfw==, tableContent=null), ArticleFig(id=1312006393591333788, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1312006378160489248, language=CN, label=图9, caption=
VMD-DWT算法去噪前后功率谱密度对比图, figureFileSmall=4+Lo9nnI1oKqZZ5R5cfBEg==, figureFileBig=4t90lMaLYQBEgvXtKGeVfw==, tableContent=null), ArticleFig(id=1312006393654248349, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1312006378160489248, language=EN, label=Fig. 10, caption=
Calibration curve of fertilizer mass flow and sensor output, figureFileSmall=vpPct2fUCVi2fIABDIj8uA==, figureFileBig=kosCcIXI+wpexkvnAzCelA==, tableContent=null), ArticleFig(id=1312006393712968606, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1312006378160489248, language=CN, label=图10, caption=
肥料质量流量与传感器输出的标定曲线, figureFileSmall=vpPct2fUCVi2fIABDIj8uA==, figureFileBig=kosCcIXI+wpexkvnAzCelA==, tableContent=null), ArticleFig(id=1312006393780077471, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1312006378160489248, language=EN, label=Tab. 1, caption=
Calculation data of velocity error in experiment 1
, figureFileSmall=null, figureFileBig=null, tableContent=
| 管道长度/mm | 平均模拟速度/(mm·s-1) | 平均速度/(mm·s-1) | 标准速度/(mm·s-1) | 模拟速度误差/% | 实际速度误差/% |
|---|
| 300 | 2 397 | 2 373 | 2 426 | 1.195 4 | 2.184 7 |
| 320 | 2 475 | 2 453 | 2 505 | 1.197 6 | 2.075 8 |
| 340 | 2 551 | 2 528 | 2 582 | 1.200 6 | 2.091 4 |
| 360 | 2 625 | 2 583 | 2 657 | 1.204 3 | 2.785 1 |
| 380 | 2 697 | 2 643 | 2 730 | 1.208 8 | 3.186 8 |
| 400 | 2 767 | 2 709 | 2 801 | 1.213 8 | 3.284 5 |
| 420 | 2 835 | 2 775 | 2 870 | 1.219 5 | 3.310 1 |
| 440 | 2 899 | 2 846 | 2 938 | 1.327 4 | 3.131 4 |
| 460 | 2 960 | 2 911 | 3 004 | 1.464 7 | 3.095 9 |
| 480 | 3 020 | 2 969 | 3 068 | 1.564 5 | 3.226 9 |
| 500 | 3 076 | 3 018 | 3 132 | 1.788 0 | 3.639 8 |
), ArticleFig(id=1312006393947849632, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1312006378160489248, language=CN, label=表1, caption=
试验1速度误差计算数据
, figureFileSmall=null, figureFileBig=null, tableContent=
| 管道长度/mm | 平均模拟速度/(mm·s-1) | 平均速度/(mm·s-1) | 标准速度/(mm·s-1) | 模拟速度误差/% | 实际速度误差/% |
|---|
| 300 | 2 397 | 2 373 | 2 426 | 1.195 4 | 2.184 7 |
| 320 | 2 475 | 2 453 | 2 505 | 1.197 6 | 2.075 8 |
| 340 | 2 551 | 2 528 | 2 582 | 1.200 6 | 2.091 4 |
| 360 | 2 625 | 2 583 | 2 657 | 1.204 3 | 2.785 1 |
| 380 | 2 697 | 2 643 | 2 730 | 1.208 8 | 3.186 8 |
| 400 | 2 767 | 2 709 | 2 801 | 1.213 8 | 3.284 5 |
| 420 | 2 835 | 2 775 | 2 870 | 1.219 5 | 3.310 1 |
| 440 | 2 899 | 2 846 | 2 938 | 1.327 4 | 3.131 4 |
| 460 | 2 960 | 2 911 | 3 004 | 1.464 7 | 3.095 9 |
| 480 | 3 020 | 2 969 | 3 068 | 1.564 5 | 3.226 9 |
| 500 | 3 076 | 3 018 | 3 132 | 1.788 0 | 3.639 8 |
), ArticleFig(id=1312006394040124321, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1312006378160489248, language=EN, label=Tab. 2, caption=
Calculation data of velocity error in experiment 2
, figureFileSmall=null, figureFileBig=null, tableContent=
| 管口直径/mm | 平均模拟速度/(mm·s-1) | 平均速度/(mm·s-1) | 标准速度/(mm·s-1) | 小球数/个 | 模拟速度误差/% | 实际速度误差/% |
|---|
| 20 | 2 742 | 2 650 | 2 801 | 55 | 2.106 4 | 5.390 9 |
| 25 | 2 756 | 2 707 | 2 801 | 86 | 1.606 6 | 3.355 9 |
| 30 | 2 767 | 2 738 | 2 801 | 124 | 1.213 9 | 2.249 2 |
| 35 | 2 768 | 2 744 | 2 801 | 169 | 1.178 2 | 2.035 0 |
| 40 | 2 767 | 2 756 | 2 801 | 220 | 1.213 9 | 1.606 6 |
), ArticleFig(id=1312006394124010402, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1312006378160489248, language=CN, label=表2, caption=
试验2速度误差计算数据
, figureFileSmall=null, figureFileBig=null, tableContent=
| 管口直径/mm | 平均模拟速度/(mm·s-1) | 平均速度/(mm·s-1) | 标准速度/(mm·s-1) | 小球数/个 | 模拟速度误差/% | 实际速度误差/% |
|---|
| 20 | 2 742 | 2 650 | 2 801 | 55 | 2.106 4 | 5.390 9 |
| 25 | 2 756 | 2 707 | 2 801 | 86 | 1.606 6 | 3.355 9 |
| 30 | 2 767 | 2 738 | 2 801 | 124 | 1.213 9 | 2.249 2 |
| 35 | 2 768 | 2 744 | 2 801 | 169 | 1.178 2 | 2.035 0 |
| 40 | 2 767 | 2 756 | 2 801 | 220 | 1.213 9 | 1.606 6 |
), ArticleFig(id=1312006394195313571, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1312006378160489248, language=EN, label=Tab. 3, caption=
Index data of signals before and after wavelet denoising
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 数据组号 | 均值 |
|---|
| 1 | 2 | 3 | 4 | 5 | 6 |
|---|
| 原始信噪比/dB | 14.902 7 | 15.426 3 | 15.787 9 | 16.421 9 | 16.478 3 | 15.456 8 | 15.745 7 |
| 原始均方根误差/V | 0.461 0 | 0.433 9 | 0.416 3 | 0.386 6 | 0.384 4 | 0.432 7 | 0.419 2 |
| 去噪后信噪比/dB | 20.295 5 | 20.898 6 | 21.341 9 | 21.932 2 | 22.071 08 | 20.822 5 | 21.227 0 |
| 去噪后均方根误差/V | 0.247 8 | 0.231 1 | 0.219 6 | 0.205 0 | 0.201 9 | 0.233 3 | 0.223 1 |
), ArticleFig(id=1312006394258228132, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1312006378160489248, language=CN, label=表3, caption=
小波去噪前后信号的指标数据
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 数据组号 | 均值 |
|---|
| 1 | 2 | 3 | 4 | 5 | 6 |
|---|
| 原始信噪比/dB | 14.902 7 | 15.426 3 | 15.787 9 | 16.421 9 | 16.478 3 | 15.456 8 | 15.745 7 |
| 原始均方根误差/V | 0.461 0 | 0.433 9 | 0.416 3 | 0.386 6 | 0.384 4 | 0.432 7 | 0.419 2 |
| 去噪后信噪比/dB | 20.295 5 | 20.898 6 | 21.341 9 | 21.932 2 | 22.071 08 | 20.822 5 | 21.227 0 |
| 去噪后均方根误差/V | 0.247 8 | 0.231 1 | 0.219 6 | 0.205 0 | 0.201 9 | 0.233 3 | 0.223 1 |
), ArticleFig(id=1312006394325336997, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1312006378160489248, language=EN, label=Tab. 4, caption=
Index data of signals before and after denoising
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 数据组号 | 均值 |
|---|
| 1 | 2 | 3 | 4 | 5 | 6 |
|---|
| 原始信噪比/dB | 14.902 7 | 15.426 3 | 15.787 9 | 16.421 9 | 16.478 3 | 15.456 8 | 15.745 7 |
| 原始均方根误差/V | 0.212 5 | 0.433 9 | 0.416 3 | 0.386 6 | 0.384 3 | 0.432 7 | 0.377 7 |
| 去噪后信噪比/dB | 22.288 4 | 22.584 0 | 23.370 8 | 23.785 5 | 23.727 2 | 22.969 3 | 23.120 9 |
| 去噪后均方根误差/V | 0.196 9 | 0.190 3 | 0.173 9 | 0.165 6 | 0.166 8 | 0.182 2 | 0.179 3 |
), ArticleFig(id=1312006394396640166, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1312006378160489248, language=CN, label=表4, caption=
去噪前后信号的指标数据
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 数据组号 | 均值 |
|---|
| 1 | 2 | 3 | 4 | 5 | 6 |
|---|
| 原始信噪比/dB | 14.902 7 | 15.426 3 | 15.787 9 | 16.421 9 | 16.478 3 | 15.456 8 | 15.745 7 |
| 原始均方根误差/V | 0.212 5 | 0.433 9 | 0.416 3 | 0.386 6 | 0.384 3 | 0.432 7 | 0.377 7 |
| 去噪后信噪比/dB | 22.288 4 | 22.584 0 | 23.370 8 | 23.785 5 | 23.727 2 | 22.969 3 | 23.120 9 |
| 去噪后均方根误差/V | 0.196 9 | 0.190 3 | 0.173 9 | 0.165 6 | 0.166 8 | 0.182 2 | 0.179 3 |
), ArticleFig(id=1312006394484720551, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1312006378160489248, language=EN, label=Tab. 5, caption=
Experimental results verification before denoising using VMD-DWT algorithm
, figureFileSmall=null, figureFileBig=null, tableContent=
| 拖拉机速度/(km·h-1) | 排肥轴转速/(r·min-1) | 传感器输出值/W | 落肥质量流量/(g·min-1) | 测得质量流量/(g·min-1) | 误差率/% |
|---|
| 2.0 | 20 | 12.49 | 3 063.8 | 1 378.4 | 122.26 |
| 25 | 10.81 | 2 556.3 | 1 683.5 | 51.84 |
| 30 | 10.41 | 2 436.9 | 1 942.9 | 25.43 |
| 35 | 10.95 | 2 599.6 | 2 214.9 | 17.37 |
| 40 | 11.10 | 2 644.7 | 2 407.7 | 9.84 |
| 45 | 11.36 | 2 722.0 | 2 685.4 | 1.36 |
| 50 | 12.65 | 3 112.6 | 2 890.2 | 7.70 |
| 4.5 | 20 | 7.20 | 1 465.0 | 1 374.0 | 7.64 |
| 25 | 7.79 | 1 644.5 | 1 676.6 | 2.58 |
| 30 | 8.83 | 1 958.7 | 1 958.1 | 0.89 |
| 35 | 9.84 | 2 264.9 | 2 221.3 | 2.95 |
| 40 | 11.34 | 2 717.5 | 2 457.3 | 10.58 |
| 45 | 12.02 | 2 923.4 | 2 705.1 | 8.07 |
| 50 | 13.04 | 3 231.8 | 2 923.9 | 10.53 |
), ArticleFig(id=1312006394556023720, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1312006378160489248, language=CN, label=表5, caption=
VMD-DWT算法去噪前验证试验结果
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| 拖拉机速度/(km·h-1) | 排肥轴转速/(r·min-1) | 传感器输出值/W | 落肥质量流量/(g·min-1) | 测得质量流量/(g·min-1) | 误差率/% |
|---|
| 2.0 | 20 | 12.49 | 3 063.8 | 1 378.4 | 122.26 |
| 25 | 10.81 | 2 556.3 | 1 683.5 | 51.84 |
| 30 | 10.41 | 2 436.9 | 1 942.9 | 25.43 |
| 35 | 10.95 | 2 599.6 | 2 214.9 | 17.37 |
| 40 | 11.10 | 2 644.7 | 2 407.7 | 9.84 |
| 45 | 11.36 | 2 722.0 | 2 685.4 | 1.36 |
| 50 | 12.65 | 3 112.6 | 2 890.2 | 7.70 |
| 4.5 | 20 | 7.20 | 1 465.0 | 1 374.0 | 7.64 |
| 25 | 7.79 | 1 644.5 | 1 676.6 | 2.58 |
| 30 | 8.83 | 1 958.7 | 1 958.1 | 0.89 |
| 35 | 9.84 | 2 264.9 | 2 221.3 | 2.95 |
| 40 | 11.34 | 2 717.5 | 2 457.3 | 10.58 |
| 45 | 12.02 | 2 923.4 | 2 705.1 | 8.07 |
| 50 | 13.04 | 3 231.8 | 2 923.9 | 10.53 |
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Experimental results verification after denoising using VMD-DWT algorithm
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| 拖拉机速度/(km·h-1) | 排肥轴转速/(r·min-1) | 传感器输出值/W | 落肥质量流量/(g·min-1) | 测得质量流量/(g·min-1) | 误差率/% |
|---|
| 2.0 | 20 | 7.54 | 1 569.3 | 1 378.4 | 13.84 |
| 25 | 8.19 | 1 765.9 | 1 683.5 | 4.89 |
| 30 | 8.84 | 2 061.4 | 1 942.9 | 6.09 |
| 35 | 9.92 | 2 288.5 | 2 214.9 | 3.32 |
| 40 | 10.24 | 2 485.6 | 2 407.7 | 3.23 |
| 45 | 10.79 | 2 550.4 | 2 685.4 | 5.03 |
| 50 | 12.22 | 2 983.2 | 2 890.2 | 3.22 |
| 4.5 | 20 | 6.81 | 1 346.4 | 1 374.0 | 2.01 |
| 25 | 7.59 | 1 584.6 | 1 676.6 | 5.49 |
| 30 | 8.63 | 1 898.3 | 1 958.1 | 3.54 |
| 35 | 9.60 | 2 191.1 | 2 221.3 | 1.36 |
| 40 | 10.66 | 2 511.3 | 2 457.3 | 2.20 |
| 45 | 11.04 | 2 626.8 | 2 705.1 | 2.90 |
| 50 | 12.06 | 2 835.6 | 2 923.9 | 3.02 |
), ArticleFig(id=1312006394727990186, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1312006378160489248, language=CN, label=表6, caption=
VMD-DWT算法去噪后验证试验结果
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| 拖拉机速度/(km·h-1) | 排肥轴转速/(r·min-1) | 传感器输出值/W | 落肥质量流量/(g·min-1) | 测得质量流量/(g·min-1) | 误差率/% |
|---|
| 2.0 | 20 | 7.54 | 1 569.3 | 1 378.4 | 13.84 |
| 25 | 8.19 | 1 765.9 | 1 683.5 | 4.89 |
| 30 | 8.84 | 2 061.4 | 1 942.9 | 6.09 |
| 35 | 9.92 | 2 288.5 | 2 214.9 | 3.32 |
| 40 | 10.24 | 2 485.6 | 2 407.7 | 3.23 |
| 45 | 10.79 | 2 550.4 | 2 685.4 | 5.03 |
| 50 | 12.22 | 2 983.2 | 2 890.2 | 3.22 |
| 4.5 | 20 | 6.81 | 1 346.4 | 1 374.0 | 2.01 |
| 25 | 7.59 | 1 584.6 | 1 676.6 | 5.49 |
| 30 | 8.63 | 1 898.3 | 1 958.1 | 3.54 |
| 35 | 9.60 | 2 191.1 | 2 221.3 | 1.36 |
| 40 | 10.66 | 2 511.3 | 2 457.3 | 2.20 |
| 45 | 11.04 | 2 626.8 | 2 705.1 | 2.90 |
| 50 | 12.06 | 2 835.6 | 2 923.9 | 3.02 |
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