The Analyse And Design On Lifter Monitoring System Based On Partern Recognition

Mine hoisting machine is one of the most important equipment for mining, and its reliable operation is directly related to the safety of plant production and economic efficiency. The supervisory control of hoister can guarantee its reliable operation. So design a good performance and reliable monitoring system has both important theoretical and practical significance.The main focus of this article is mine hoist monitoring system. We analyze the needs of monitoring system and try to develop a control strategy and monitoring method. The main task is to monitor the system's hardware circuit design and software design.This paper first introduced the composition of the mine hoist and the requirements of the electric control system. Then we analyze the characteristics and needs of mine hoist monitoring system. Based on the requirements of the project we choose CPU226 PLC which is the most senior model of Siemens S7-200 series as the main system control device, and select the extended modules which support the processor's expansion, as well as the touch screen for PC monitor. Aiming at the deficiency of monitor strategy and protecting function of domestic monitoring devices, this system adds some new protection functions and creates a new method by changing the position of Speed-Reducing Point to control the hoister's speed. At the same time, combining the powerful functions of the processor as well as the convenience to directly collect field signal, we design a braking function for the monitor system which can realize constant deceleration braking, then we develop a set of full automatic system from protection to surveillance and constant deceleration.Secondly, in order to achieve satisfactory system protection, this system adds some monitoring functions and at the same time improves the means to monitor hoisters. With regard to the determination of the Deceleration Point, I adopt a fuzzy control strategy which formulated by myself and can break the limitations brought by Fixed-Reducing-Point. Because of the inconvenience of the simulation of this method , we have to verify its results in the experimental device .In order to verify the braking system control method using fuzzy Constant deceleration braking ,we build a simulation model under MatLab/SimuLink environment and results show that the fuzzy control method can meet the very good monitoring system to control braking systems. An increase of some functions at the same time to monitor improvements in surveillance of hoist way point for the slowdown in the determination of the use of my own study of a fuzzy control strategy, breaking the slowdown in fixed-point brought about by the limitations of this approach due to poor simulation, so in the experimental device is verified. In order to verify the braking system control method using fuzzy Constant deceleration braking, in MatLab/SimuLink environment, build a simulation model, results show that the fuzzy control method can meet the very good monitoring system to control braking systems.According to the control method, this system also designs a set of equipments which based on the PLC and touch screen and other devices. We also design a whole schematic of the circuit for this system. In the meantime, we design this system's software using mixed-level programming with PLC ladder diagram, sentence table and Class-Language. We achieved the designation of subroutine and main program on interruption counting, Fuzzy control and speed protection curve. Then we use the special configuration software which is configured to touch-screen to provide multiple monitoring interfaces.In the laboratory, we establish a set of specialized hoist control system to test the monitoring system. Test results show that the monitoring system can achieve reliable monitoring and protection function, the action of output control is rapid and can meet the requirements of mine hoist system for the monitoring.