The Research Of Ball Mill Charge Motion Measurement Based On Mems

Ball mill is widely used as a material crushing equipment. But because of its internal harsh work environment, it always lacks of effective detection methods to detect charge motion form. Based on the micro inertial measurement technology principle and its application situation, a new method of measuring medium motion in the ball mill is presented. The collection of charge motion data achieved can provide certain reference for ball mill related studies.To solve the problems of ball mill charge motion measurement, this paper have designed a smart ball, which’s volume is enough small and weight can be ignored. The ball includes MEMS sensor, such as three axis accelerometer, gyroscope, magnetometer and so on. Charge motion data can be gained by using the smart ball. Firstly, the charge motion measurement scheme for ball mill is designed, which includes establishing the key coordinate system, data acquisition of charge motion,data transmission method between the ball and computer, and data processing algorithm in the computer. Then a detailed hardware design and software design for the core measurement unit are listed, and design the structure of the ball. The attitude angle error test which based on the mill cylinder body rotation experiment is measured by the attitude solution procedure written in MATLAB language for the measuring unit. The results show the attitude angle error is3°in30s, and it verifies the credibility of the measured data and also shows that the data processing algorithm is substantial correctly. Finally, the ball mill charge motion measurement experiment is carried out.5sets of the grinding average charge collision force and rotational kinetic energy data under different grinding speed with the smart ball are collected. It get the optimum rotational speed of the test mill, which is about34rpm.In this paper, a new method to measure the charge motion of ball mill is introduced, which can supplies quantitative analysis for ball mill related studies, and has a better reference value and practical significance.