Study And Design Of Continuous Casting Mould Vibration Controller Based On CAN Bus

Crystallizer is the first cooling device of the continuous casting machine as well as the keydevice of the continuous casting mould. The vibration of the Crystallizer is an importantdimension to enhance the quality of casting blank and to take a good influnce on the efficiencyof the continuous casting mould. The non-sin vibration spends much time in vibrating up thanvibrating down. This vibration can avoid the adhesive steel leakage, and has passive affectionsin demoulding and casting blank quality enhancing. By adopting hydraulic vibration, thecrystallizer grips the characteristics that include real time configurable parameters, high-ranking precision etc. CAN bus is a kind of multi-master manner fieldbus, of CAN bus havethe advantages in transmission speed, reliability, flexible configuration etc. It can enhance theefficiency and the automation degree of the continuous casting mould, that designs thecrystallizer hydraulic vibration controller based on CAN bus.This thesis designs a crystallizer hydraulic vibration controller based on CAN bus.Around the STM32microprocessor, completes the synchronization serial interface (SSI)module,2-channel synchronized displacement acquisition module using external ADC Chip,2-channel synchronized control signal outputting module using external DAC Chip, internalADC module, connecting module, HMI module, etc. by modularization design method. On thevibration displacement acquisition, this controller advances the performance on speed,precision, and anti-interference by SSI. Meanwhile, the controller has good compatibility withthe current outputting instrument by the ADC module that makes sure the current acquisitioncompatibility. The CAN bus has been selected for connection module, that has enhanced theconnecting efficiency. The program of this controller is designed by C programming language,the software realize these functions that include setting the reference vibration wave inmicroprocessor, modifying non-sin wave, acquiring the field signal, PID, control signaloutputting, connecting, HMI, etc. Because of adopting the method that estimate the range ofmodifying the non-sin parameters, and alter these parameters step by step, the controller canavoid the shocking caused by modifying parameters. By means of the application of CAN bus,the controller has the capability to upload the signal acquiring on field and parameters, as wellas the capability to download the command that is set by industry PC and accomplish thecontrol mission. When the CAN bus is in malfunction, the controller will run independently toguarantee the stability of the continuous casting.The hardware is designed using Altium Designer application, and manufactures theprototype product. The software is designed using the keil development platform. The functionof the controller that includes building reference waves, modifying the non-sin parameters,acquiring signals, PID, outputting, connecting and HMI is debugged and verified.As anintelligent CAN node, the controller accomplished the Requirements of the design, and havethe capability to finish the control mission in the multi-continuous casting mould system.