Lifting hook motion state monitor system based on MEMS sensors

XUE Feng， YUAN Wei-zheng， CHANG Hong-long， YUAN Guang-min， SHEN Qiang
（Micro and Nano Electromechanical Systems Laboratory， Northwestern Polytechnical University，
Xi'an 710072， China）

Abstract： Aiming at the practical application of low-lost lifting hook movement，a lifting hook motion state monitor system based on MEMS sensors was presented. Two dimensional dip angle and azimuth angle of the hook can be measured with the micro accelerometer and magnetometer in real time. Different magnetometer compensation methods were analyzed. Because of the big error of the azimuth angle in strong magnetic environment，an error compensation method using T-S fuzzy logic was proposed. Model machine was manufactured and the performance was tested. The results indicate that the measurement precision of dip angle can reach ±0.2°and azimuth angle can reach ±0.8°. The application requirements is satisfied and the foreground is great.
Key words： lifting hook movement； micro-electromechanical systems （MEMS） sensor；state monitor system；T-S fuzzy logic