Monitor Method Research For Information Flow Of No-tillage Seeder

As one of the directly seeding and fertilizing machines for the crop straw covering ground, the no-tillage seeder is the key equip in the conservation tillage agriculture equipment and has become the focus of recent research and development. The energy consumption and efficiency of no-tillage seeders is directly influenced by soil traction resistance to a large extent, so it is an effective way to analyze the efficiency and energy consumption by using the dynamic parameters in the operation process. The traditional wired methods of measure need lay the cable, which is complex, and the adjustment, expansion, and maintenance of the measuring points are inconvenient. In addition, few testing equipments specially used for no-tillage seeder make more difficulties for the real-time detection and the research of the no-tillage seeder working performance. Based on wireless sensor network technology, embedded technology and computer measurement and control technology, the no-tillage seeder information remote monitoring system was developed by analyzing the parameters in the no-tillage seeder operation process, such as power and speed.The research ideas were intended to monitor no-tillage seeder dynamic parameters and realize the near distance and remote monitoring using wireless sensor network. Wireless sensor network is a kind of self-organizing network, which is composed of many small nodes, and can be used for sensing, testing, collecting signal processing and controlling. Nodes were installed in each test positions to gather and transfer data, and can acquire and process sensor data, then finally send the data to the data gathering node. Data gathering node transfers the bulk data to the scene of the portable wireless data monitor for on-site monitoring. The portable wireless data monitor again transferred the data to the remote computer remote monitoring center by wireless sensor networks based on wireless multi-hop routing for data processing, online analysis, real-time display and mass storage, etc.An operation process parameters testing method for space force, rotating dynamics and operation speed groundwater advection was proposed, by analyzing the forces of no-tillage seeder suspension mechanism. A two-dimensional shaft pin force-measuring sensor was designed to test the traction in the sowing and using six component force measuring mechanism to test the space force of the suspension mechanism. Dynamic torque sensor is designed for machine operation by rotating the power detection and using differential GPS speed sensor to test the drill operation speed parameters.The Zigbee wireless sensor network is constructed for data acquisition and wireless transmission of the no-tillage seeder. A wireless sensor network simulation model is established by using wireless sensor network simulation tools Truetime under the Matlab/Simulink environment, which is used to simulate wireless sensor network system of the no-tillage seeder information detection, analyze the data packet loss and the influence of network delay on the detection system.Based on the Zigbee wireless module, configured type wireless data collectors was designed, which can be used for information acquisition and wireless transmission, such as no-tillage seeder for less3points suspension structure, power input shaft torque and rotational speed and operating speed. Configured type wireless data collectors had the capability of multi-channel acquisition and channel multiplexing function, whose data acquisition and wireless transmission software running on the BoS system supported by Zigbee protocol. What’s more the configured type wireless data collectors were used sliding filter to filter the acquisition of analog data, and realize the frequency accurately, by improving the measuring period T algorithm of frequency measurement. Appraised by China’s Institute of Metrology, Beijing, the analog acquisition error is less than or equal to0.04%and frequency signal gathering error is0.A portable wireless data monitor based on embedded ARM was developed, which has many advantages, such as two levels of wireless transmission, mobile information monitoring, portable and easy to install. The portable wireless data monitor with a piece of7inch touch screen allows the operator operating in a touch way. In the detector installed a built-in Zigbee coordinator to receive data from various data collector nodes in a wireless sensor network. The ARM core processor was used to processing data, and sent the data to the remote computer monitoring center through the remote wireless transmission module XTend. The drill parameters monitoring software, which runs in the embedded WinCE6.0operating environment, based on multi-threading technology was developed to process the data from the wireless data collector.A remote monitoring software was developed, which included five subsystems, namely, human-computer interaction, the background batch data processing, data storage, historical data query and other auxiliary functions. To efficiently process the no-tillage seeder operation information parameters, using MFC class library developing the Human-computer interaction interface, and using the multi-thread technology and overlapped I/O technology processing the background data and using the multi-thread synchronization technology storing the data time oriented. The remote monitoring software can dynamical monitor the network status of the wireless data terminal nodes, and it can configure the collector node working parameters in a long-distance according to the actual need.Various a serial of tests had been done by installing the no-tillage seeder remote monitoring system on corn and wheat no-tillage seeders, and the results showed that:tests data described the variation trend of tractive force that the no-tillage seeder loaded, which indicated that the system could realize information monitor both in short and long distance for no-tillage seeder. compared with other detecting systems, this system reduced the field test complexity for no-tillage seeder, which supplied a better and more convenient method for researchers to study no-tillage seeder.