Development of agriculture machinery aided guidance system based on GPS and GIS

The agriculture machinery guidance technology is one of precision agricultural important technologies. Based on GPS and GIS, it can raise working efficiency and improve the quality, reduce production costs, reduce driver working difficulty. This research´s general goals realize the aided guidance function for agriculture machinery driving on road and straight line operation in the field by lightbar. The system uses Visual Basic 6.0 and MapObjects 2.2, uses the RS232 serial port communication, uses the AgGPS 332 receiver, uses the DGPS signal offered by Satellite Based Augmentation Systems, uses touch-screen vehicle carries computer for the superior computer, applies the existing area electronic map, develops region´s farmland and path´s geographic information system, enables the farm machinery to obtain the guidance information for transportation between the fields. When farm machinery works in field without guidance line, system can make guidance straight line at first traveling schedule according to the A and B points, uses light-bar guidance. Lightbar´s hardware circuit uses the 89S52 Single chip micro-processor and outside expands two piece of 74HC245 to actuate the LED. The system has realized to agriculture machinery´s guidance function and could record operating course and calculate area and review operation that is convenient for agricultural production and information management.