【作者】 任红文；

【导师】 周庆国； 许哲；

【作者基本信息】 兰州大学 ， 计算机技术， 2010， 硕士

【摘要】 兰州重离子加速器(HIRFL)是一台组合加速器装置,它自1988年建成至今,为众多的离子核物理和应用实验提供了多种束流。而高频系统是为加速器提供能量的关键系统。加速器运行时,高频电压加在高频腔体上,用来实现对粒子的加速。高频腔体热变形,腔体的机械震动等都会造成腔体失谐从而引起腔体电压的下降以及高频电压的相位漂移。因此,频率调谐系统既是保证腔体正常运行的关键部分之一,自动调谐系统能够实现对高频腔调谐的远程控制,能够快速、准确的进行调谐。单片微型计算机是微型计算机的一个重要分支,也是颇具生命力的机种。特别适用于控制领域。近年来单片机的应用正在不断地走向深入,已越来越广泛地应用于智能仪表、工业控制、日常生活等很多领域。单片机突出的特点是体积小,功耗低,可靠性高。本文的工作就是设计一个能很好满足要求的自动频率调谐系统,从硬件设计、软件设计、抗干扰设计方面对系统的实现进行了描述。总体设计以简单和经济为基本出发点,尽量选用低价的高性能芯片以节省设计成本。设计了单片机控制单元的软件,主要包括初始化子程序、采集数据子程序、移相子程序、方向识别子程序、调谐子程序和显示子程序,并完成了整个软、硬件系统的调试。更多还原

【Abstract】 Heavy Ion Research Facility in Lanzhou (HIRFL) is an equipment, which is combined by some sub-accelerator. Since 1988, when it was built, it has supplied a lot of beam for both ion nuclear physics and applications experiments. Radio frequency systems are the critical systems for energy accelerator. In order to accelerate the particles, radio frequency voltage will be added to the RF cavity when the accelerator is running.The factors, such as thermal deformation and mechanical vibrating of the cavity, will result in cavity detuning which led to the decline in cavity voltage, and phase drift. Therefore, the frequency tuning system is the key part of the accelerator to ensure the cavity work normally.Auto-tuning system can tune the radio frequency cavity, remotely, fast and accurately.Single-chip micro-computer is an important branch of micro-computer, and also quite viable models. It is particularly applicable to control fields. In recent years, MCU applications are continually deepening, more and more widely used in smart instruments, industrial control, and many other areas of daily life. MCU prominent feature is the small size, low power consumption and high reliability.The purpose of this paper is to design an automatic frequency tuning system, which can well meet the requirements of the accelerator, and to describe the system in several aspects, such as hardware design, software design, and anti-interference design. The overall design with simple and economy as the starting point, try to choose low-cost, high-performance chips in order to save design costs. The MCU control unit, including data sample procedures, initial subroutine, phase shift subroutines, direction identify subroutines, tuning subroutine and display subroutine, has been designed. And the debugging of hardware and software of this system has been completed.更多还原