| Combine harvester as the main equipment for wheat and rice harvesting, which is developing rapidly in recent years. The combine harvester increasingly to large-scale, automation, intelligent development, has greatly improved the production efficiency and operating conditions. However, the electronic and automation level of the combines in domestic is generally low, which is behind abroad more than30years. And modern combine harvester cab is equipped with a closed air-conditioned environment. Field operations, operators are difficult to hear the voice of the combine harvester moving parts, and cannot identify the combine harvester of the load changes. So this is easy to cause clogging of the combine harvester harvesting process common faults, even when the operators continue to run the machine due to lacking experience and thus aggravate the fault or serious damage to the machine. Delay harvest timing and cause some economic loss. In response to this phenomenon, always grasp the combine harvester working condition, given the failure to remind, then the combine harvester working in the best condition and reduce the failure rate and increase the effectiveness of the work.This work is supported by National Science and Technology Supporting Plan, and the combine harvester, with the type of GN60produced by Foton Lovol International Heavy Industry Company, is selected as the research object. Based on the analysis of the combine harvester monitoring system, designed a combine harvester automatic monitoring system.The main research of this thesis includes:1. The hardware design of main components of the combine monitoring device:Research and design are based on PIC18F2580MCU as the core of the monitoring device. Designed in accordance with the structure of the machine speed monitoring device based on the Hall sensor, the detection accuracy can reach1%. The rotating parts combine harvester speed signal detection. Designed a strain gauge torque, the detection precision can reach1%. Fuel consumption monitoring device with a flow sensor, its static detection accuracy up to5‰; Designed a header height monitoring device, the device based on the displacement sensor; Designed based on an electric putter threshing cylinder concave clearance adjusting device. The study designs an on-line monitoring system, which monitor the power of the tangential drum and the power of longitudinal-axial drum. Mathematical formulas between the feed quantity and the power were derived based on analysis the experiment data. An indirect way to determine the feeding quantity of a combine harvester was found. In the monitoring process, grain mass flow was monitored for further verification. Through the CAN bus integrated technology, composed of the CAN bus network, the monitoring signal information sharing, monitoring node with the host computer system communication.2. The software design of main components of the combine monitoring device:In my paper, software designed into upper and lower computer software design, in which the system PC software, select Visual Basic6.0as a programming language. Lower computer software using C language as a programming language.3. Field-text:The field test is divided into harvested wheat field trials and harvest rice field test. The device sensors are mounted to the GN60harvester in each corresponding position. After several improvements, In Xuzhou Bao Feng Group Company Farm wheat field harvest test, the three-day and15-day test in the rice harvest in Heilongjiang Bao quan ling Farm. During the test monitoring device is working, CAN bus communication is normal. |
PDF Full Text Request