薄面激光-硅光电池中小粒径种子流监测装置研制
|
摘要
针对油菜、小麦等中小粒径种子在播种过程中难以兼容监测的问题,该文采用光层厚度约为1 mm的薄面激光发射模组和硅光电池的光伏效应原理设计了一种中小粒径种子流监测装置。根据薄面激光模组发射角度与硅光电池对角线长度计算出种子监测区域大小以及监测区域的具体位置,明确了监测装置的导管内径、导管中心线位置、薄面激光发射模组与硅光电池的相对位置等结构参数。对种子穿越薄面激光层所需时间进行分析,油菜种子的穿越响应信号在3 ms以内完成,小麦种子的穿越响应信号在7 ms以内完成。对种子的穿越响应信号进行隔直通交、双级放大、半波整流、电压比较、单稳态触发转化为单脉冲信号,作为单片机外部中断源进行计数,获得播量信息,实现了中小粒径种子流无碰撞检测。油菜精量排种器台架试验和小麦数粒仪试验表明:在排种频率8.4～32.1 Hz范围内,油菜种子的监测准确率不低于98.1%,在排种频率21.5～31.2 Hz范围内,小麦种子的监测准确率不低于95.1%。田间播种试验结果表明:在田间正常排种频率范围内,油菜种子的监测准确率不低于98.6%,小麦种子的监测准确率不低于95.8%,光照条件、机具振动对监测精度无影响。
Rapeseed and wheat are important oil and food crops in china, the sowing dates of them are adjacent, and planting area ranks in the forefront of the world. Precision combined seeding can improve working efficiency, reduce operating costs, increase farmer's income. Monitoring the sowing process is one of the trends in the development of intelligent seeders. The sowing process of the precision planter for rapeseed and wheat is completely closed, miss seeding caused by various factors in the field can not be corrected in time. It is of great practical significance to study a seed flow monitoring device for medium and small particle size monitoring the sowing process real time, so as to improve the intelligence level of the precision planter for rapeseed and wheat. In recent years, domestic and foreign scholars carried out many related studies on miss seeding and reseeding detection system mainly for potato, corn, wheat and other large and medium seeds. Few studies have focused on miss seeding and reseeding detection system for rapeseed and other small seeds because of its small size, light weight and high seeding frequency. Rapeseed and wheat are both seeding at high frequencies, but the rapeseed size is small(average particle size 0.8-2.2 mm), wheat size is larger(average length 6.25 mm, width 3.33 mm, thickness 3.07 mm), it is difficult for them to achieve compatible detection. In order to solve the above problems, a small and medium size seed flow monitoring device was designed based on the principle of photovoltaic effect of thin surface laser and silicon photocell in this paper. A thin surface laser emitting module with a thickness of about 1 mm and a photovoltaic effect produced by a silicon photocell were used. According to the emission angle of thin laser module and the diagonal length of silicon photocell, the size of seed monitoring area and the specific location of monitoring area were calculated, the structure parameters of the monitoring device, such as the inner diameter of the catheter, the position of the catheter center line, the relative position of thin laser module and silicon photocell, were defined. The time required for seeds to pass through the thin laser layer was analyzed. The response signal of rapeseed was completed within 3 ms and that of wheat seeds was completed within 7 ms. The response signal of seed crossing was transformed into single pulse signal by means of isolated direct traffic, double-stage amplification, half-wave rectification, voltage comparison and monostable trigger, and as an external interrupt source of single chip computer, thus the seeding information was counted, and the collision-free detection of small and medium sized seed flow was realized. Testing results of seed metering device metering at different revolving speed and counting instrument metering with high frequency showed that in the seeding frequency range of 8.4 to 32.1 Hz, the monitoring accuracy of rapeseed was not less than 98.1%, in the seeding frequency range of 21.5 to 31.2 Hz, the monitoring accuracy of wheat was not less than 95.1%. The results of field experiments showed that the device could monitor the seeding amount of small and medium sized seeds in real time, and the field light and vibration of machine had no effects on the monitoring accuracy.
Rapeseed and wheat are important oil and food crops in china, the sowing dates of them are adjacent, and planting area ranks in the forefront of the world. Precision combined seeding can improve working efficiency, reduce operating costs, increase farmer's income. Monitoring the sowing process is one of the trends in the development of intelligent seeders. The sowing process of the precision planter for rapeseed and wheat is completely closed, miss seeding caused by various factors in the field can not be corrected in time. It is of great practical significance to study a seed flow monitoring device for medium and small particle size monitoring the sowing process real time, so as to improve the intelligence level of the precision planter for rapeseed and wheat. In recent years, domestic and foreign scholars carried out many related studies on miss seeding and reseeding detection system mainly for potato, corn, wheat and other large and medium seeds. Few studies have focused on miss seeding and reseeding detection system for rapeseed and other small seeds because of its small size, light weight and high seeding frequency. Rapeseed and wheat are both seeding at high frequencies, but the rapeseed size is small(average particle size 0.8-2.2 mm), wheat size is larger(average length 6.25 mm, width 3.33 mm, thickness 3.07 mm), it is difficult for them to achieve compatible detection. In order to solve the above problems, a small and medium size seed flow monitoring device was designed based on the principle of photovoltaic effect of thin surface laser and silicon photocell in this paper. A thin surface laser emitting module with a thickness of about 1 mm and a photovoltaic effect produced by a silicon photocell were used. According to the emission angle of thin laser module and the diagonal length of silicon photocell, the size of seed monitoring area and the specific location of monitoring area were calculated, the structure parameters of the monitoring device, such as the inner diameter of the catheter, the position of the catheter center line, the relative position of thin laser module and silicon photocell, were defined. The time required for seeds to pass through the thin laser layer was analyzed. The response signal of rapeseed was completed within 3 ms and that of wheat seeds was completed within 7 ms. The response signal of seed crossing was transformed into single pulse signal by means of isolated direct traffic, double-stage amplification, half-wave rectification, voltage comparison and monostable trigger, and as an external interrupt source of single chip computer, thus the seeding information was counted, and the collision-free detection of small and medium sized seed flow was realized. Testing results of seed metering device metering at different revolving speed and counting instrument metering with high frequency showed that in the seeding frequency range of 8.4 to 32.1 Hz, the monitoring accuracy of rapeseed was not less than 98.1%, in the seeding frequency range of 21.5 to 31.2 Hz, the monitoring accuracy of wheat was not less than 95.1%. The results of field experiments showed that the device could monitor the seeding amount of small and medium sized seeds in real time, and the field light and vibration of machine had no effects on the monitoring accuracy.
引文
[1]沈金雄,傅廷栋.我国油菜生产、改良与食用油供给安全[J].中国农业科技导报,2011,13(1):1-8.Shen Jinxiong,Fu Tingdong.Rape production,improvemengt and edible oil supply safety in China[J].Review of China Agricultural Science and Technology,2011,13(1):1-8.(in Chinese with English abstract)
[2]殷艳,王汉中.我国油菜生产现状及发展趋势[J].农业生产展望,2011(1):43-45.Yin Yan,Wang Hanzhong.Current situation and development trend of rapeseed production in China[J].Prospect of Agricultural Production 2011(1):43-45.(in Chinese with English abstract)
[3]农牧与食品机械杂志社编.国外农机产品手册[M].北京:机械工业出版社,1992.
[4]石金刚.美制约翰·迪尔播种机电子监测器简介[J].农业机械,1999(3):36-37.
[5]John D.Monitoring and documentation[EB/OL].(2015-08-04)[2016-01-08].http://www.deere.com/en_US/parts/parts_by_industry/ag/seeding/monitoring/monitoring.page.
[6]车宇,伟利国,刘婞韬,等.免耕播种机播种质量红外监测系统设计与试验[J].农业工程学报,2017,33(增刊1):11-16.Che Yu,Wei Liguo,Liu Xingtao,et al.Design and experiment of seeding quality infrared monitoring system for no-tillage seeder[J].Transactions of the Chinese Society of Agricultural Engineering(Transactions of the CSAE),2017,33(Supp.1):11-16.(in Chinese with English abstract)
[7]M C Electronics.Sistema full semina[EB/OL].(2018-04-11)[2016-01-08]https://www.mcelettronica.it/it/prodotti/semina/semina-di-precisione/full-semina_272c28.html.
[8]赵立业,蹇兴东.排种性能检测传感器设计与试验[J].农业工程学报,2005,36(7):41-43.Zhao Liye,Jian Xingdong.Design and test of seed metering performance sensor[J].Transactions of the Chinese Society of Agricultural Engineering(Transactions of the CSAE),2005,36(7):41-43.(in Chinese with English abstract)
[9]刘洪强,马旭,袁月明,等.基于光电传感器的精密排种器性能检测[J].吉林农业大学学报,2007,29(3):347-349.Liu Hongqiang,Ma Xu,Yuan Yueming,et al.Performance detection of precision seed-metering device based on optoelectronic sensor[J].Journal of Jilin Agricultural University,2007,29(3):347-349.(in Chinese with English abstract)
[10]余以道,文泽军,罗善明,等.高速光电反射式转矩转速传感器及其试验研究[J].仪器仪表学报,2009,30(3):610-614.Yu Yidao,Wen Zejun,Luo Shanming,et al.Study on high speed photo electric reflective torque speed sensor[J].Chinese Journal of Scientific Instrument,2009,30(3):610-614.(in Chinese with English abstract)
[11]付兴兰,张兆国,安晓飞,等.光电漫反射式联合收割机谷物产量计量系统研发与性能试验[J].农业工程学报,2017,33(3):24-30.Fu Xinglan,Zhang Zhaoguo,An Xiaofei,et al.Development and performance experiment on grain yield monitoring system of combine harvester based on photoelectric diffuse reflectance[J].Transactions of the Chinese Society of Agricultural Engineering(Transactions of the CSAE),2017,33(3):24-30.(in Chinese with English abstract)
[12]安晓飞,付兴兰,孟志军,等.光电信号与收割机谷物产量数据转换模型的构建与验证[J].农业工程学报,2017,33(增刊1):36-41.An Xiaofei,Fu Xinglan,Meng Zhijun,et al.Grain yield data transformation model based on photoelectric principle and its validation[J].Transactions of the Chinese Society of Agricultural Engineering(Transactions of the CSAE),2017,33(Supp.1):36-41.(in Chinese with English abstract)
[13]刘鹏,李小昱,王为,等.基于光电传感器和示踪法的径流流速测量系统的研究[J].农业工程学报,2007,23(5):116-120.Liu Peng,Li Xiaoyu,Wang Wei,et al.Runoff flow velocity measurement system using photoelectric sensor and tracing method[J].Transactions of the Chinese Society of Agricultural Engineering(Transactions of the CSAE),2007,23(5):116-120.(in Chinese with English abstract)
[14]Zhang Xiaoqian,Li Hanshan.Research on target capture probability calculation model of composite photoelectric detection imaging sensor system[J].Original Reasearch Article,2018,166(8):161-168.
[15]周利明,王书茂,张小超,等.基于电容信号的玉米播种机排种性能监测系统[J].农业工程学报,2012,28(13):16-21.Zhou Liming,Wang Shumao,Zhang Xiaochao,et al.Seed monitoring system for corn planter based on capacitance signal[J].Transactions of the Chinese Society of Agricultural Engineering(Transactions of the CSAE),2012,28(13):16-21.(in Chinese with English abstract)
[16]刘志壮,吕贵勇.基于电容法的稻谷含水率检测[J].农业机械学报,2013,44(7):179-182.Liu Zhizhuang,LüGuiyong.Moisture content detection of paddy rice based on capacitance approach[J].Transactions of the Chinese Society for Agricultural Machinery,2013,44(7):179-182.(in Chinese with English abstract)
[17]高志涛,刘卫平,赵燕东.基于电容法的非接触式土壤水分传感器设计与性能分析[J].农业机械学报,2016,47(11):185-191.Gao Zhitao,Liu Weiping,Zhao Yandong.Design and performance analysis of soil moisture sensor based on capacitance technology[J].Transactions of the Chinese Society for Agricultural Machinery,2016,47(11):185-191.(in Chinese with English abstract)
[18]周利明,李树君,张小超,等.基于电容法的棉管籽棉质量流量检测[J].农业机械学报,2014,45(6):47-52.Zhou Liming,Li Shujun,Zhang Xiaochao,et al.Detection of seedcotton mass flow based on capacitance approach[J].Transactions of the Chinese Society for Agricultural Machinery,2014,45(6):47-52.(in Chinese with English abstract)
[19]周利明,马明,苑严伟,等.基于电容法的施肥量检测系统设计与试验[J].农业工程学报,2017,33(24):44-51.Zhou Liming,Ma Ming,Yuan Yanwei,et al.Design and test of fertilizer mass monitoring system based on capacitance method[J].Transactions of the Chinese Society of Agricultural Engineering(Transactions of the CSAE),2017,33(24):44-51.(in Chinese with English abstract)
[20]张霖,赵祚喜,可欣荣,等.压电式种子计数系统[J].农业机械学报,2011,42(8):42-45.Zhang Lin,Zhao Zuoxi,Ke Xinrong,et al.Piezoelectric seed counting system[J].Transactions of the Chinese Society for Agricultural Machinery,2011,42(8):42-45.(in Chinese with English abstract).
[21]陈书法,张石平,李耀明,等.压电型振动气吸式穴盘育苗精量播种机设计与试验[J].农业工程学报,2012,28(增刊1):15-20.Chen Shufa,Zhang Shiping,Li Yaoming,et al.Design and experiment of piezoelectric type vibration air-suction precision seeder with holey tray[J].Transactions of the Chinese Society of Agricultural Engineering(Transactions of the CSAE),2012,28(Supp.1):15-20.(in Chinese with English abstract)
[22]黄东岩,贾红雷,祁悦,等.基于聚偏二氟乙烯压电薄膜的播种机排种监测系统[J].农业工程学报,2013,29(33):15-22.Huang Dongyan,Jia Honglei,Qi Yue,et al.Seeding monitor system for planter based on polyvinylidence fluoride piezoelectric film[J].Transactions of the Chinese Society of Agricultural Engineering(Transactions of the CSAE),2013,29(33):15-22.(in Chinese with English abstract)
[23]郑永军,马超,张艳超,等.基于PVDF压电传感器的水滴冲击力检测系统[J].农业机械学报,2014,45(增刊1):142-147.Zheng Yongjun,Ma Chao,Zhang Yanchao,et al.Detection system of droplet impact force based on PVDF sensor[J].Transactions of the Chinese Society for Agricultural Machinery,2014,45(Supp.1):142-147.(in Chinese with English abstract)
[24]雷小龙,廖宜涛,李兆东,等.油麦兼用型气送式集排器供种装置设计与试验[J].农业工程学报,2015,31(20):10-18.Lei Xiaolong,Liao Yitao,Li Zhaodong,et al.Design and experiment of a feeding deVice for air powered double row air collector[J].Transactions of the Chinese Society of Agricultural Engineering(Transactions of the CSAE),2015,31(20):10-18.(in Chinese with English abstract)
[25]丁幼春,杨军强,朱凯,等.油菜精量排种器种子流传感装置设计与试验[J].农业工程学报,2017,33(9):29-36.Ding Youchun,Yang Junqiang,Zhu Kai,et al.Design and experiment on seed flow sensing device for rapeseed precision metering device[J].Transactions of the Chinese Society of Agricultural Engineering(Transactions of the CSAE),2017,33(9):29-36.(in Chinese with English abstract)
[26]丁幼春,王雪玲,廖庆喜,等.基于时变窗口的油菜精量排种器漏播实时检测方法[J].农业工程学报,2014,30(24):11-21.Ding Youchun,Wang Xueling,Liao Qingxi,et al.Method of real-time loss sowing detection for rapeseed precision metering device based on time changed window[J].Transactions of the Chinese Society of Agricultural Engineering(Transactions of the CSAE),2014,30(24):11-21.(in Chinese with English abstract)
[27]丁幼春,王雪玲,廖庆喜,等.基于时间间隔的多路精量排种器性能检测系统设计与试验[J].农业工程学报,2016,32(7):11-18.Ding Youchun,Wang Xueling,Liao Qingxi,et al.Design and experiment of performance testing system of multi-channel seed-metering device based on time intervals[J].Transactions of the Chinese Society of Agricultural Engineering(Transactions of the CSAE),2016,32(7):11-18.(in English with Chinese abstract)
[28]丛锦玲,廖庆喜,曹秀英,等.油菜小麦兼用排种盘的排种器充种性能[J].农业工程学报,2014,30(8):30-39.Cong Jinling,Liao Qingxi,Cao Xiuying,et al.Seed filling performance of dual-purpose seed plate in metering device for both rapeseed&wheat seed[J].Transactions of the Chinese Society of Agricultural Engineering(Transactions of the CSAE),2014,30(8):30-39.(in Chinese with English abstract)
[29]雷小龙,廖宜涛,丛锦玲,等.油菜小麦兼用气送式直播机集排器参数优化与试验[J].农业工程学报,2018,34(12):16-26.Lei Xiaolong,Liao Yitao,Cong Jinling,et al.Parameter optimization and experiment of air-assisted centralized seed-metering device of direct seeding machine for rape and wheat[J].Transactions of the Chinese Society of Agricultural Engineering(Transactions of the CSAE),2018,34(12):16-26.(in Chinese with English abstract)
[30]雷小龙,廖宜涛,李兆东,等.油菜小麦兼用气送式集排器搅种装置设计及充种性能试验[J].农业工程学报,2016,32(18):26-34.Lei Xiaolong,Liao Yitao,Li Zhaodong,et al.Design of seed churning device in air-assisted centralized metering device for rapeseed and wheat and experiment on seed filling performance[J].Transactions of the Chinese Society of Agricultural Engineering(Transactions of the CSAE),2016,32(18):26-34.(in Chinese with English abstract)
[31]Lauren M Cruz,George L Shillinger,Nathan J Robinson,et al.Effect of light intensity and wavelength on the in-water orientation of olive ridley turtle hatchlings[J].Journal of Experimental Marine Biology and Ecology,2018,505:52-56.
[2]殷艳,王汉中.我国油菜生产现状及发展趋势[J].农业生产展望,2011(1):43-45.Yin Yan,Wang Hanzhong.Current situation and development trend of rapeseed production in China[J].Prospect of Agricultural Production 2011(1):43-45.(in Chinese with English abstract)
[3]农牧与食品机械杂志社编.国外农机产品手册[M].北京:机械工业出版社,1992.
[4]石金刚.美制约翰·迪尔播种机电子监测器简介[J].农业机械,1999(3):36-37.
[5]John D.Monitoring and documentation[EB/OL].(2015-08-04)[2016-01-08].http://www.deere.com/en_US/parts/parts_by_industry/ag/seeding/monitoring/monitoring.page.
[6]车宇,伟利国,刘婞韬,等.免耕播种机播种质量红外监测系统设计与试验[J].农业工程学报,2017,33(增刊1):11-16.Che Yu,Wei Liguo,Liu Xingtao,et al.Design and experiment of seeding quality infrared monitoring system for no-tillage seeder[J].Transactions of the Chinese Society of Agricultural Engineering(Transactions of the CSAE),2017,33(Supp.1):11-16.(in Chinese with English abstract)
[7]M C Electronics.Sistema full semina[EB/OL].(2018-04-11)[2016-01-08]https://www.mcelettronica.it/it/prodotti/semina/semina-di-precisione/full-semina_272c28.html.
[8]赵立业,蹇兴东.排种性能检测传感器设计与试验[J].农业工程学报,2005,36(7):41-43.Zhao Liye,Jian Xingdong.Design and test of seed metering performance sensor[J].Transactions of the Chinese Society of Agricultural Engineering(Transactions of the CSAE),2005,36(7):41-43.(in Chinese with English abstract)
[9]刘洪强,马旭,袁月明,等.基于光电传感器的精密排种器性能检测[J].吉林农业大学学报,2007,29(3):347-349.Liu Hongqiang,Ma Xu,Yuan Yueming,et al.Performance detection of precision seed-metering device based on optoelectronic sensor[J].Journal of Jilin Agricultural University,2007,29(3):347-349.(in Chinese with English abstract)
[10]余以道,文泽军,罗善明,等.高速光电反射式转矩转速传感器及其试验研究[J].仪器仪表学报,2009,30(3):610-614.Yu Yidao,Wen Zejun,Luo Shanming,et al.Study on high speed photo electric reflective torque speed sensor[J].Chinese Journal of Scientific Instrument,2009,30(3):610-614.(in Chinese with English abstract)
[11]付兴兰,张兆国,安晓飞,等.光电漫反射式联合收割机谷物产量计量系统研发与性能试验[J].农业工程学报,2017,33(3):24-30.Fu Xinglan,Zhang Zhaoguo,An Xiaofei,et al.Development and performance experiment on grain yield monitoring system of combine harvester based on photoelectric diffuse reflectance[J].Transactions of the Chinese Society of Agricultural Engineering(Transactions of the CSAE),2017,33(3):24-30.(in Chinese with English abstract)
[12]安晓飞,付兴兰,孟志军,等.光电信号与收割机谷物产量数据转换模型的构建与验证[J].农业工程学报,2017,33(增刊1):36-41.An Xiaofei,Fu Xinglan,Meng Zhijun,et al.Grain yield data transformation model based on photoelectric principle and its validation[J].Transactions of the Chinese Society of Agricultural Engineering(Transactions of the CSAE),2017,33(Supp.1):36-41.(in Chinese with English abstract)
[13]刘鹏,李小昱,王为,等.基于光电传感器和示踪法的径流流速测量系统的研究[J].农业工程学报,2007,23(5):116-120.Liu Peng,Li Xiaoyu,Wang Wei,et al.Runoff flow velocity measurement system using photoelectric sensor and tracing method[J].Transactions of the Chinese Society of Agricultural Engineering(Transactions of the CSAE),2007,23(5):116-120.(in Chinese with English abstract)
[14]Zhang Xiaoqian,Li Hanshan.Research on target capture probability calculation model of composite photoelectric detection imaging sensor system[J].Original Reasearch Article,2018,166(8):161-168.
[15]周利明,王书茂,张小超,等.基于电容信号的玉米播种机排种性能监测系统[J].农业工程学报,2012,28(13):16-21.Zhou Liming,Wang Shumao,Zhang Xiaochao,et al.Seed monitoring system for corn planter based on capacitance signal[J].Transactions of the Chinese Society of Agricultural Engineering(Transactions of the CSAE),2012,28(13):16-21.(in Chinese with English abstract)
[16]刘志壮,吕贵勇.基于电容法的稻谷含水率检测[J].农业机械学报,2013,44(7):179-182.Liu Zhizhuang,LüGuiyong.Moisture content detection of paddy rice based on capacitance approach[J].Transactions of the Chinese Society for Agricultural Machinery,2013,44(7):179-182.(in Chinese with English abstract)
[17]高志涛,刘卫平,赵燕东.基于电容法的非接触式土壤水分传感器设计与性能分析[J].农业机械学报,2016,47(11):185-191.Gao Zhitao,Liu Weiping,Zhao Yandong.Design and performance analysis of soil moisture sensor based on capacitance technology[J].Transactions of the Chinese Society for Agricultural Machinery,2016,47(11):185-191.(in Chinese with English abstract)
[18]周利明,李树君,张小超,等.基于电容法的棉管籽棉质量流量检测[J].农业机械学报,2014,45(6):47-52.Zhou Liming,Li Shujun,Zhang Xiaochao,et al.Detection of seedcotton mass flow based on capacitance approach[J].Transactions of the Chinese Society for Agricultural Machinery,2014,45(6):47-52.(in Chinese with English abstract)
[19]周利明,马明,苑严伟,等.基于电容法的施肥量检测系统设计与试验[J].农业工程学报,2017,33(24):44-51.Zhou Liming,Ma Ming,Yuan Yanwei,et al.Design and test of fertilizer mass monitoring system based on capacitance method[J].Transactions of the Chinese Society of Agricultural Engineering(Transactions of the CSAE),2017,33(24):44-51.(in Chinese with English abstract)
[20]张霖,赵祚喜,可欣荣,等.压电式种子计数系统[J].农业机械学报,2011,42(8):42-45.Zhang Lin,Zhao Zuoxi,Ke Xinrong,et al.Piezoelectric seed counting system[J].Transactions of the Chinese Society for Agricultural Machinery,2011,42(8):42-45.(in Chinese with English abstract).
[21]陈书法,张石平,李耀明,等.压电型振动气吸式穴盘育苗精量播种机设计与试验[J].农业工程学报,2012,28(增刊1):15-20.Chen Shufa,Zhang Shiping,Li Yaoming,et al.Design and experiment of piezoelectric type vibration air-suction precision seeder with holey tray[J].Transactions of the Chinese Society of Agricultural Engineering(Transactions of the CSAE),2012,28(Supp.1):15-20.(in Chinese with English abstract)
[22]黄东岩,贾红雷,祁悦,等.基于聚偏二氟乙烯压电薄膜的播种机排种监测系统[J].农业工程学报,2013,29(33):15-22.Huang Dongyan,Jia Honglei,Qi Yue,et al.Seeding monitor system for planter based on polyvinylidence fluoride piezoelectric film[J].Transactions of the Chinese Society of Agricultural Engineering(Transactions of the CSAE),2013,29(33):15-22.(in Chinese with English abstract)
[23]郑永军,马超,张艳超,等.基于PVDF压电传感器的水滴冲击力检测系统[J].农业机械学报,2014,45(增刊1):142-147.Zheng Yongjun,Ma Chao,Zhang Yanchao,et al.Detection system of droplet impact force based on PVDF sensor[J].Transactions of the Chinese Society for Agricultural Machinery,2014,45(Supp.1):142-147.(in Chinese with English abstract)
[24]雷小龙,廖宜涛,李兆东,等.油麦兼用型气送式集排器供种装置设计与试验[J].农业工程学报,2015,31(20):10-18.Lei Xiaolong,Liao Yitao,Li Zhaodong,et al.Design and experiment of a feeding deVice for air powered double row air collector[J].Transactions of the Chinese Society of Agricultural Engineering(Transactions of the CSAE),2015,31(20):10-18.(in Chinese with English abstract)
[25]丁幼春,杨军强,朱凯,等.油菜精量排种器种子流传感装置设计与试验[J].农业工程学报,2017,33(9):29-36.Ding Youchun,Yang Junqiang,Zhu Kai,et al.Design and experiment on seed flow sensing device for rapeseed precision metering device[J].Transactions of the Chinese Society of Agricultural Engineering(Transactions of the CSAE),2017,33(9):29-36.(in Chinese with English abstract)
[26]丁幼春,王雪玲,廖庆喜,等.基于时变窗口的油菜精量排种器漏播实时检测方法[J].农业工程学报,2014,30(24):11-21.Ding Youchun,Wang Xueling,Liao Qingxi,et al.Method of real-time loss sowing detection for rapeseed precision metering device based on time changed window[J].Transactions of the Chinese Society of Agricultural Engineering(Transactions of the CSAE),2014,30(24):11-21.(in Chinese with English abstract)
[27]丁幼春,王雪玲,廖庆喜,等.基于时间间隔的多路精量排种器性能检测系统设计与试验[J].农业工程学报,2016,32(7):11-18.Ding Youchun,Wang Xueling,Liao Qingxi,et al.Design and experiment of performance testing system of multi-channel seed-metering device based on time intervals[J].Transactions of the Chinese Society of Agricultural Engineering(Transactions of the CSAE),2016,32(7):11-18.(in English with Chinese abstract)
[28]丛锦玲,廖庆喜,曹秀英,等.油菜小麦兼用排种盘的排种器充种性能[J].农业工程学报,2014,30(8):30-39.Cong Jinling,Liao Qingxi,Cao Xiuying,et al.Seed filling performance of dual-purpose seed plate in metering device for both rapeseed&wheat seed[J].Transactions of the Chinese Society of Agricultural Engineering(Transactions of the CSAE),2014,30(8):30-39.(in Chinese with English abstract)
[29]雷小龙,廖宜涛,丛锦玲,等.油菜小麦兼用气送式直播机集排器参数优化与试验[J].农业工程学报,2018,34(12):16-26.Lei Xiaolong,Liao Yitao,Cong Jinling,et al.Parameter optimization and experiment of air-assisted centralized seed-metering device of direct seeding machine for rape and wheat[J].Transactions of the Chinese Society of Agricultural Engineering(Transactions of the CSAE),2018,34(12):16-26.(in Chinese with English abstract)
[30]雷小龙,廖宜涛,李兆东,等.油菜小麦兼用气送式集排器搅种装置设计及充种性能试验[J].农业工程学报,2016,32(18):26-34.Lei Xiaolong,Liao Yitao,Li Zhaodong,et al.Design of seed churning device in air-assisted centralized metering device for rapeseed and wheat and experiment on seed filling performance[J].Transactions of the Chinese Society of Agricultural Engineering(Transactions of the CSAE),2016,32(18):26-34.(in Chinese with English abstract)
[31]Lauren M Cruz,George L Shillinger,Nathan J Robinson,et al.Effect of light intensity and wavelength on the in-water orientation of olive ridley turtle hatchlings[J].Journal of Experimental Marine Biology and Ecology,2018,505:52-56.