织机经纱张力控制系统设计

织机经纱张力控制系统设计

文档编号:ZD615 文档字数:21751,页数:47，有外文翻译，原理图，

摘要

现如今，纺织行业正面临着严峻的挑战，其竞争的焦点就是产品结构的调整、产品档次和品质水平的提高。用新的科学技术改造传统的工艺技术，这是提高生产力的必由之路，尤其是在科学突飞猛进，技术更新速度空前加快的今天，更是如此，因此对传统纺织工业必须进行有步骤的和彻底的改造。
当前国内的纺织机大多不能满足高档织物的要求，其关键之处在于不能更好的解决送经时的恒张力控制。所以高档织机大多来自进口。
本文档主要是设计织机送经系统的恒张力控制系统。解决这个问题的关键之处就是怎么控制张力，在此，我想到了利用控制电动机的转速就可以实现张力的控制了。在当前的电动机调速中，SPWM调速显得日益突出。因此，在设计中也是利用了SPWM调速。
设计流程如下：
1．文档开始先对纺织机各大机构进行分析，找出影响张力恒定的原因；
2．接下来进行硬件的设计，选择合适的芯片，组成控制器；
3．编写软件，实现对控制器的实际控制。
控制流程：利用单片机来控制变频器，产生SPWM波，进行对交流伺服电动机转速的控制，再由张力检测传感器将张力信号反馈给单片机，来实现恒张力的控制。

关键词：送经，恒张力，SPWM，伺服电动机，单片机

Abstract
Now, the textile industry is faced with severe challenges, the competition is the focus of the adjustment of product structure, product quality and raising the level of quality. With new science and technology to transform traditional technology, which is the only way to increase productivity, especially in the rapid development of science, technology updates unprecedented speed up the pace today, especially, the traditional textile industry must be carried out step by step and complete the The transformation.
The current domestic textile machines are unable to meet the requirements of high-grade fabric, the key lies in the fact can not be better off resolving the constant tension control. Therefore, high-grade loom mostly from imports.
This paper is designed loom off the constant tension control system. The key to solve this problem is how control of the tension in this, I thought of using the motor speed control can be achieved control of the tension. In the current governor of the motor, SPWM governor become increasingly prominent. Therefore, the design is also used SPWM governor.
The design process as follows:
1. Papers start to the textile machine analysis of the major agencies to identify the reasons for the impact of constant tension;
2. Next to the hardware design, select the appropriate chips, comprising controller;
3. Preparation software, the controller realized the actual control
Control process: SCU to control the use of inverter, a SPWM wave, the AC servo motor speed control, and then from tension to tension detection sensor signals back to the SCM, to achieve constant tension control.

Key words: loom off, the constant tension, SPWM, AC servo motors, SCM

第1章概述 1
1.1引言 1
1.2剑杆织机的发展趋势 2
1.3电子送经的发展趋势 4
1.4课题研究意义及内容 5
第2章送经原理及张力分析 6
2.1织机工作五大运动分析 6
2.2送经机构分析 8
2.3电子送经系统 9
2.4经纱张力分类 10
2.5影响经纱张力因素 11
2.6张力计算数学模型 12
2.7小结 14
第3章控制系统硬件设计 15
3.1控制系统总体框图 15
3.2张力检测装置 15
3.3主轴光电编码器信号处理电路设计 18
3.4变频器主电路设计 19
3.5变频器控制电路设计 21
3.6小结 28
第4章程序设计 29
4.1主程序编程 29
4.2 AD转换程序设计 36
第5章总结 43
参考文献 44
致谢 45

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