21 research outputs found
Evaluatie van balanceerinrichtingen voor een stabiele spuitboom op een veldspuit : een quick-scan
Deze rapportage beschrijft een inventarisatie van op de markt beschikbare regelsystemen voor de balansverbetering van spuitbomen op veldspuiten
Centimeter-Precision Guidance of Agricultural Implements in the Open Field by Means of Real Time Kinematic Dgps
Multi-year precision guidance of agricultural implements in the open field enables the exact placing of inputs, and to grow crops on predetermined spots. The on-line system proposed here, uses a digital map that contains all co-ordinates to describe the intended path of the implement in the field, a sensor to measure the actual position of the implement, a comparator to calculate the position error, a controller to generate a correction signal and an actuator, mounted between the tractor and the implement to side-shift the implement onto the intended path. On a test track a tractor was driven at a speed of 5.2 km h-1, what resulted in a repeatable sideways sway of the tractor plus and minus ±10 cm. The implement, mounted on the backside of the actuator, was side-shifted to a straight path programmed in the digital map. The true path of the implement was recorded and showed a deviation from the straight line of less than ±2 cm
Boeren op de centimeter - precisiebesturing van werktuigen in het open veld
In het kader van 'precisielandbouw' doet IMAG-DLO onderzoek naar het met hoge snelheid besturen van landbouwmachines. Met behulp van een sattelietnavigatie en een van tevoren gemaakt plan in een computer wordt een werktuig keer op keer nauwkeurig langs hetzelfde pad gestuurd. De trekker mag slingeren wat hij wil, het werktuig blijft op de juiste koers. Een tussenbalan
Test of an automatic precision guidance system for implements for row crops and its effect on weed development and fertilizer use in sugar beet
Centimetre-precision guidance of moving implements in the open field: a simulation based on GPS measurements.
High quality and sustainable agricultural production in the open field will be supported by centimetre-precision guidance of agricultural implements. In this paper, a complete guidance system is proposed and simulated using real sensor data obtained from a real time kinematic (RTK) differential global positioning system (DGPS). This type of the satellite navigation system became available commercially in 1997 and is claimed to reach cm accuracy. It uses real time kinematics to improve the accuracy of a position fix by phase comparison of the carrier signal. The simulation primarily aims to investigate the accuracy of the guidance system that can be obtained with RTK DGPS. Using real DGPS measurement errors the simulated system showed a tracking error less than 0.005 m when the PID-controller had settled