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Design of Electronic Let-off and Electronic Take-up Control System Based on μC/OS-Ⅱ

Author: LiuGang
Tutor: ChenZongNong
School: Zhejiang University
Course: Mechanical Design and Theory
Keywords: rapier loom electronic let-off μC/OS-II finite state machine Embedded system
CLC: TS103.33
Type: Master's thesis
Year: 2008
Downloads: 85
Quote: 0
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Abstract


The electronic let-off system that is an important part of rapier loom has been developing rapidly in recent years.Traditional mechanical let-off systems are being substituted by electronic let-off systems depending on thier advantage of performance. At present, electronic let-off system overseas has been developed well, but for many reasons, the national researching in this field is just on the underway level. So the purpose of this paper is to study and exploit electronic let-off system with high performance, which is very important for improving the national rapier loom’s automation and international competitiveness.The main works include:1) This paper brings up the subject’s purpose and content by comparing present electronic let-off system in domestic and international market, and combining the direction of the rapier loom’s development.2) This paper analyses the electronic let-off system’s work course in details, and designs the states in working according to the PLC step-control principle, and summarizes the transition relation, and designs the main frame of the entire software by using finite-state-machine.3) This paper chooses the NXP’s LPC2214 MCU as main control unite through comparing present all kinds of embedded MCUs, and designs the A/D circuit to sample the warp tension, PWM circuit, EEPROM circuit, UART communication circuit, LED display circuit, buzzer circuit, external RAM circuit, bottom circuit, power -supply circuit, JTAG circuit and so on.4) This paper designs and debugs the electronic let-off circuit module drivers forμC/OS-II, including I~2C driver, UART driver, SPI driver and so on, which is the foundation of task-design based onμC/OS-II.5) This paper analyses the function and characteristics ofμC/OS-II, and migrates it to main MCU, and designs all the task program during electronic let-off working based onμC/OS-II.6) This paper debugs the software hand hardware of the electronic let-off system, and solves the main problems that occur during the process.7) This paper summarizes the insufficiency of this system, and gives the direction to improve.

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CLC: > Industrial Technology > Light industry,handicrafts > Textile industry,dyeing and finishing industry > General issues > Textile industry machinery and equipment > Weaving equipment > Loom
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