Most traditional maize seeding parameter monitoring devices use wired data transmission.The problems include wiring troubles,short transmission distances.And human-computer interaction display terminals are unique and...Most traditional maize seeding parameter monitoring devices use wired data transmission.The problems include wiring troubles,short transmission distances.And human-computer interaction display terminals are unique and usually customized rather than universal.A remote monitoring system for maize seeding parameters based on Android and wireless communication was developed in this study.The system used a single-chip microcomputer as the main controller and an infrared photoelectric sensor to capture seed information.The Android terminal application was used to set and display the seeder’s seed parameter information and monitor it.The Air202 communication module enabled remote data transmission,while the Global Positioning System(GPS)monitored the speed of the planter.By establishing a message queue telemetry transmission(MQTT)cloud served as a data freight station,data reception,storage and forwarding can be performed.Seeding parameters can generate Excel spreadsheets in real-time for easy data processing and storage.In order to verify the reliability of the system,the seeding parameter monitoring comparison test and the multi-terminal remote monitoring test were designed.The results of the seeding parameter monitoring comparison test showed that the monitoring system of this study had higher monitoring accuracy.The maximum average relative error of seeding parameter monitoring was 0.4%,which had high monitoring accuracy.The multi-terminal remote monitoring test showed that the monitoring system of this research can adapt many types of Android terminals,realize the wireless connection,and realize remote synchronous monitoring at different distances.This study provides a reference for intelligent remote monitoring and intelligent agriculture on unmanned farms.展开更多
Large high-speed corn precision planters can significantly improve seeding efficiency,but at present,there is no mature control technology in China.This study proposed a novel low-cost control system for large high-sp...Large high-speed corn precision planters can significantly improve seeding efficiency,but at present,there is no mature control technology in China.This study proposed a novel low-cost control system for large high-speed corn precision planters based on multiple technologies such as embedded systems,controller area network(CAN),global positioning system(GPS),and Android development technology.The developed control system provided excellent expansion capabilities of more than 40 planter rows.Functions such as monitoring the planter status,adjusting seed density,calculating planting-area were realized.Field experiments were performed under different GPS frequencies(fGPS),travel speeds,and seed spacings.Results showed that the working area relative error index(REI)and fGPS were negatively correlated,and the planter can achieve 0.84%error under the fGPS of 10 Hz.When the travel speed was 10 km/h or 12 km/h,the average quality index(QI),miss index(MI),and precision index(PI)were superior to 92.84%,5.80%,and 18.57%under each seed spacing,respectively,QI and MI had no significant difference under each seed spacing(p<0.05).For a travel speed of 14 km/h,indexes values reached the worst level at seed spacing of 20 cm,but still met the requirements of Chinese national standards.The total cost of the control system for a 12-row corn precision planter is only 17.07%of similar products from abroad.In summary,the developed control system can achieve preferable performance and costs much less than similar products obtained from abroad,which is suitable for promotion in China or other developing countries.展开更多
基金This work was financially supported by the National Key Research and Development Program of China(Grant No.2017YFD0700703)the National Natural Science Foundation of China(Grant No.51575515)the National Industry System of Corn Technology of China(CARS-02).
文摘Most traditional maize seeding parameter monitoring devices use wired data transmission.The problems include wiring troubles,short transmission distances.And human-computer interaction display terminals are unique and usually customized rather than universal.A remote monitoring system for maize seeding parameters based on Android and wireless communication was developed in this study.The system used a single-chip microcomputer as the main controller and an infrared photoelectric sensor to capture seed information.The Android terminal application was used to set and display the seeder’s seed parameter information and monitor it.The Air202 communication module enabled remote data transmission,while the Global Positioning System(GPS)monitored the speed of the planter.By establishing a message queue telemetry transmission(MQTT)cloud served as a data freight station,data reception,storage and forwarding can be performed.Seeding parameters can generate Excel spreadsheets in real-time for easy data processing and storage.In order to verify the reliability of the system,the seeding parameter monitoring comparison test and the multi-terminal remote monitoring test were designed.The results of the seeding parameter monitoring comparison test showed that the monitoring system of this study had higher monitoring accuracy.The maximum average relative error of seeding parameter monitoring was 0.4%,which had high monitoring accuracy.The multi-terminal remote monitoring test showed that the monitoring system of this research can adapt many types of Android terminals,realize the wireless connection,and realize remote synchronous monitoring at different distances.This study provides a reference for intelligent remote monitoring and intelligent agriculture on unmanned farms.
基金This study was supported by the National Key Research and Development Program of China(Grant No.2017YFD0700703)the National Natural Science Foundation of China(Grant No.51575515)the National Industry System of Corn Technology of China(CARS-02).
文摘Large high-speed corn precision planters can significantly improve seeding efficiency,but at present,there is no mature control technology in China.This study proposed a novel low-cost control system for large high-speed corn precision planters based on multiple technologies such as embedded systems,controller area network(CAN),global positioning system(GPS),and Android development technology.The developed control system provided excellent expansion capabilities of more than 40 planter rows.Functions such as monitoring the planter status,adjusting seed density,calculating planting-area were realized.Field experiments were performed under different GPS frequencies(fGPS),travel speeds,and seed spacings.Results showed that the working area relative error index(REI)and fGPS were negatively correlated,and the planter can achieve 0.84%error under the fGPS of 10 Hz.When the travel speed was 10 km/h or 12 km/h,the average quality index(QI),miss index(MI),and precision index(PI)were superior to 92.84%,5.80%,and 18.57%under each seed spacing,respectively,QI and MI had no significant difference under each seed spacing(p<0.05).For a travel speed of 14 km/h,indexes values reached the worst level at seed spacing of 20 cm,but still met the requirements of Chinese national standards.The total cost of the control system for a 12-row corn precision planter is only 17.07%of similar products from abroad.In summary,the developed control system can achieve preferable performance and costs much less than similar products obtained from abroad,which is suitable for promotion in China or other developing countries.