吴南,林静,李宝筏,周宇明.免耕播种机排种器性能监控系统设计与试验[J].农业机械学报,2016,47(s1):69-75.
Wu Nan,Lin Jing,Li Baofa,Zhou Yuming.Design and Test on Performance Monitoring System of No-tillage Planter Seed metering Device[J].Transactions of the Chinese Society for Agricultural Machinery,2016,47(s1):69-75.
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免耕播种机排种器性能监控系统设计与试验   [下载全文]
Design and Test on Performance Monitoring System of No-tillage Planter Seed metering Device   [Download Pdf][in English]
投稿时间:2016-07-20  
DOI:10.6041/j.issn.1000-1298.2016.S0.011
中文关键词:  免耕播种机  排种器  监控系统  粒距  工作速度  光纤传感器
基金项目:农业部公益性行业(农业)科研专项(201503116)和国家自然科学基金项目(51275318)
作者单位
吴南 沈阳农业大学
辽宁机电职业技术学院 
林静 沈阳农业大学 
李宝筏 沈阳农业大学 
周宇明 沈阳农业大学
辽宁机电职业技术学院 
中文摘要:为了提高排种器性能检测的方便性、灵活性和高精准度,设计了一种以可编程控制器(PLC)和触摸屏为核心的便携式排种器性能监控系统。通过设置排种器相关参数,实时检测排种器排种的合格率、漏播率、重播率、变异系数和断条率等排种器性能指标。试验结果表明:系统对播种量的检测精度在97.90%以上,漏播的检测精度为90.56%以上,重播的检测精度为87.71%以上。对排种盘转速、粒距、机器前进速度、合格率进行了二次回归正交试验,验证了系统对排种器性能检测的准确性。
Wu Nan, Lin Jing, Li Baofa and Zhou Yuming
Shenyang Agricultural University;Liaoning Mechatronics College,Shenyang Agricultural University,Shenyang Agricultural University and Shenyang Agricultural University;Liaoning Mechatronics College
Key Words:No-tillage planter  seed metering device  monitoring system  seed spacing  working speed  fiber optic sensor
Abstract:The performance monitoring system of a portable seed metering device was developed, which took a programmable logic controller (PLC) and a touchable screen as the core, to improve the convenience, flexibility and high precision of seed metering monitoring. The monitoring system applied programming software, named Delta WPLSoft V237, to customize the PLC ladder diagram program and configuration software, named DOPSoft 20004, to achieve the development of human computer interaction interface. The performance monitoring system of seed metering device was mainly composed of detection system, control system and monitoring system. Detection system used two rectangular fiber area sensors, which were installed on the top and bottom of monitored area to detect qualified number, replay number, leakage number and seeding rate. The interval between seeds was detected by sensor to determine seed spacing. Closed loop control system was composed of PLC, servo driver, servo motor and pulse encoder, servo motor and seed metering shaft was directly connected, the working speed of planter was simulated through controlling the speed of servo motor. It was used to control the seed metering device of rotating shaft work speed, realize precision stepless regulation and ensure the seed metering device of rotating shaft according to the set speed stable operation. Monitoring system was mainly controlled by the touch screen, which can display sowing device performance with various technique indexes and the running situation of the control system. It can set seed metering relevant parameters on the human computer interaction interface to real timely monitor the performance indicators of seed metering device, including qualification rate, seed missing rate, seed repeating rate, coefficient of variation and breaking rate. The test results on monitoring system accuracy showed that the test accuracy of sensor 1 was above 95.42% and 1.77%~4.58% of test error was caused by the situation that two seeds may fall into the same monitoring zone at the same time during seed metering process. The error was decided by metering performance of the device and the re seeding caused by situation that two seeds fell into the same monitoring zone can be tested by sensor 2 which was under the seed sprout. The test error rate was between 1.77% and 4. 58%, while the combination of sensor 1 and sensor 2 can get the accuracy rate range from 97.90% to 99.22%. Two tests of quadratic orthogonal regression on the rotation speed of planting plate and the interval of two seeds’ falling time demonstrated that the performance of the chosen spoon typed seed metering device was the best with rotation speed of 32.29r/min, seed spacing of 28.44cm and machine moving speed of 4.25km/h. The parameter information from the test, including row spacing, qualification rate, seed missing rate and seed repeating rate, etc., can provide scientific basis for seed metering device to achieve its best performance at appropriate speed. It can solve the bulkiness and intricacies shortage of seed metering test bed which was used indoors to imitate field working environment in China. Meanwhile, the results can provide technical reference for precisely seeding of corn no tillage planter.

Transactions of the Chinese Society for Agriculture Machinery (CSAM), in charged of China Association for Science and Technology (CAST), sponsored by CSAM and Chinese Academy of Agricultural Mechanization Science(CAAMS), started publication in 1957. It is the earliest interdisciplinary journal in Chinese which combines agricultural and engineering. It always closely grasps the development direction of agriculture engineering disciplines and the published papers represent the highest academic level of agriculture engineering in China. Currently, nearly 8,000 papers have been already published. There are around 3,000 papers contributed to the journal each year, but only around 600 of them will be accepted. Transactions of CSAM focuses on a wide range of agricultural machinery, irrigation, electronics, robotics, agro-products engineering, biological energy, agricultural structures and environment and more. Subjects in Transactions of the CSAM have been embodied by many internationally well-known index systems, such as: EI Compendex, CA, CSA, etc.

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