Agricultural tractor slippage measurement system using encoders

Guidance system for agricultural tractor with four wheel steering

In a typical automatic guidance system for agricultural machines, the guidance system controls only one degree of freedom; either the steering angle of the front wheels of the tractor or other steering equipment is used for steering. In a tractor with the multiple degrees of freedom, like four wheel steering, the guidance system may use both the degrees of freedom for path tracking. However, th...

Non-tractor, agricultural machinery injuries in Ontario.

Single-chip velocity measurement system for incremental optical encoders

A single chip system is designed, implemented, tested and analyzed for the measurement of velocity from incremental optical encoders with quadrature outputs. The system uses a field programmable gate array (FPGA) chip to take advantage of high flexibility and a low cost design cycle. The device uses two counting methods: period counting for low velocities and frequency counting for high velocit...

Tractor Operators’ Perceptions of Farm Tractor Safety Issues and Implications to Agricultural and Extension Education

Historically, the purpose of farm safety and health educational materials and programs has been to persuade, convince or educate farmers, members of their families, and hired employees to voluntarily engage in safe behavior during farm or nonfarm work activities (Murphy, 1992). Increasingly, authors have noted that traditional farm safety educational programs have been relatively ineffective (A...

Nonlinear Model Predictive Trajectory Control in Tractor-Trailer System for Parallel Guidance in Agricultural Field Operations

So called automatic guidance systems are becoming more common in agricultural tractors, so that a driver does not need to steer the vehicle. The systems are mostly relying on GPS with correction. However, these systems usually steer only the tractor itself, despite the fact that the implement is the one that has to be run side by side with the previous swath. With towed implements, or trailers,...