Design And Development Of Ball Mill Vibration Signal Acquisition And Wireless Transmission Device

Ball mill is the key equipment in mineral grinding processing. The ball mill load including the volume of the ball, ores, as well as water is an important parameter in the process of ore grinding, which is connected with the grinding efficiency and energy consumption. Vibration of ball mill is a reflection of an important indicator about the load. In order to improve ball mill running stability, economy and efficiency, to save energy and to protect the device, it is attractive to develop a ball mill load measurement system. Supported by "863 Project" Research Topics, ball mill vibration signal acquisition and wireless transmission device has been design and development in this thesis, to provide the hardware platform for soft sensor modeling of ball mill load testing. Combined with the experiment-data, verifying the device has been feasibility.The main contributions of this thesis are summarized as follows:(1) According to the industrial environment of the ball mill, this thesis designs a overall program of a ball mill load detection system which takes into account of the mill external response to vibration, sound, current, as well as import and export ball mill to the water and the concentration of pulp etc.(2) This thesis designs a ball mill vibration signal acquisition and wireless transmission device. The device apply vibration sensor based on MEMS technology, to be installed in the mill rotating cylinder wall and using wireless communication. The device includes the transmitter for vibration signal acquisition and data processing and the receiver to provide a platform for soft-sensing modeling analysis.(3) The hardware and software systems are designed and developed in this thesis. The development of the hardware system mainly includes transmitter and receiver system. The development of functional modules mainly includes sensor module, A/D module, DSP module, wireless communication module and the serial communication module as so on. Software system design include:main transmitter, main receiver, A/D subroutine, wireless communication subroutine, subroutines and serial port etc.(4) The vibration signal acquisition and wireless transmission equipment on the function is verified. The results show that:the device in the vibration signal acquisition and transmission has been in accordance with the known vibration the signal in time domain frequency domain characteristics.