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摘要
Precision ball hinges are widely employed in parallel mechanisms, but its rotation orientation and angle can not be known in its passive motion. Measurement of multi-dimensional angular displacement will be very of great significance in the prediction, feedback and control of motion errors of parallel mechanism. Based on the magnetic effect, a new method to identify the orientation and rotation angle with Hall sensors array matched by permanent magnet is proposed. The basic idea is embedding a permanent magnet in the ball head and several hall sensors are distributed in the ball socket. When the ball head carrying the permanent magnet rotates together, the Hall sensors array will detect the variation of magnetic induction intensity, and then the angle information can be calculated by mathematics model. An embedded prototype is developed after finishing the theoretical modeling, simulation calculation and feasibility experiment, the real-time measurement of the spherical hinge rotation angle has been realized and improved by optimizing the inverse algorithm and the signal redundancy calculation. Therefore, the ball hinge has evolved into an intelligent component integrated with transmission and sensing function. As the research continues, its accuracy will be greatly improved, and can be applied to precision engineering in the future.
- 出版日期2017
- 单位合肥工业大学
