基于I2C总线的针织机多路橡筋输送控制系统设计

Design of multi-line elastic belt conveying control system for knitting machine based on I2C bus

摘要:

为了解决针织机橡筋输送装置速度固定,单路输送,输送速度与织机转速不匹配等问题,提出了基于I2C(Inter-Integrated Circuit)通信的多路橡筋输送控制系统设计方案,该方案通过主从单片机的I2C总线通信,实现控制主机与PWM(Pulse Width Modulation)信号输出从机的实时通信,从机经过细分电路、驱动电路控制步进电机,运用步进电机升降速微分算法与转速匹配算法,实现具有良好速度匹配的多路可变速橡筋输送装置控制系统,同时,由于I2C总线具有易扩展性,通过单片机I/O口间的总线模拟通信与扩展,实现多路输送。最后通过设置仿真实验,验证了该系统步进电机与针织机针筒的转速匹配效果较好,当步进电机驱动器(TB6600)为32细分、PWM信号的占空比为60%时,电机转速平稳、振动较小,系统噪声低。该系统能够在提高织物松紧度、提高织物生产效率与调节织物形态方面产生积极作用。

Abstract:

In order to solve the problems of fixed speed, single-way conveying, conveying speed and loom speed mismatch of knitting machine elastic belt conveying device, a design scheme of multi-line rubber band conveying control system based on I2C (Inter-Integrated Circuit) communication is proposed. The scheme realizes the real-time communication between the control host and the PWM (Pulse Width Modulation) signal output slave through the I2C bus communication of the master-slave MCU. The slave machine controls the stepper motor through the subdivision circuit and the drive circuit, and uses the stepping motor to speed up and down the differential. Algorithm and speed matching algorithm to realize multi-speed variable speed elastic belt conveyor control system with good speed matching. At the same time, because I2C bus has easy scalability, it can realize multi-channel through bus analog communication and expansion between MCU I/O ports. delivery. Finally, by setting up simulation experiments, it is verified that the speed matching between the stepping motor and the knitting machine needle is better. When the stepping motor driver (TB6600) is 32 subdivided and the duty ratio of the PWM signal is 60%, the motor The speed is stable, the vibration is small, and the system noise is low. The system can play a positive role in improving fabric tightness, improving fabric production efficiency and adjusting fabric morphology.