【作者】 吕晓菲；

【导师】 杨承恩；

【作者基本信息】 大连海事大学 ， 控制理论与控制工程， 2006， 硕士

【摘要】 耳鸣是指在没有外界声音参与的情况下耳朵里却有某种响声。全世界近6亿的人患有不同程度的耳鸣,其中4.3%的人其耳鸣严重影响生活、工作和社交活动,甚至更加严重。老年人的耳鸣发病率更高。目前没有任何药物能够立竿见影地使耳鸣停止,而且使所有患者的耳鸣消失。 本文是以TI公司生产的TMS320C3000系列浮点DSP(TMS320C31PQL40)为核心单元,设计了一个小型的应用系统。该系统可以产生幅值、频率、相位可调的正弦信号,将其转换成模拟信号通过耳机输出,得到可以适用于人耳的一种声波。文中对该应用系统的硬件设计过程和软件编程思想做了较详细的介绍,这是在了解了耳鸣的基本原理后受掩蔽疗法的启发而产生的一种设想,想通过此种方法对耳鸣治疗起到一定的作用。 论文的引言部分阐述了论文的选题背景、目的和意义,介绍整个应用系统的整体框架和设计思路。在第一章中介绍了DSP芯片的基本情况以及TMS320C3X的C语言开发方法。第二章详细介绍了整个应用系统的硬件电路实现,包括系统时钟设计、DSP核心单元与存储器(RAM、EPROM)的接口设计、D/A转换电路、逻辑电路以及按键显示模块的电路设计,还有制作印刷电路板时采取的抗干扰措施。第三章是系统的软件部分,主要是分模块对系统的程序设计与功能实现进行了介绍,并对各程序的功能做了一定的说明,尤其是对程序中系统的初始化以及主要寄存器的设置进行了详细叙述。论文的最后对系统的设计进行总结,说明了取得的成绩,同时也指出了设计的不足之处以及改进方法。更多还原

【Abstract】 Tinnitus means one can feel some kind of noise in his ear when in fact there is no sound outside. Nearly 600 million people in the world are suffering different kinds of tinnitus. 4.3 percent people of them can’t live a normal life or take natural doings because of serious tinnitus. They can’t do their work naturally or even worse. Especially when it comes to the old people, their incidence of tinnitus is higher. At present, there is no medicament can get effect instantly in stopping tinnitus, and get all the sufferers’ tinnitus away.In this paper, an abbreviated application system is designed with floating-point DSP TMS320C31PQL40 as its core, which is produced by TI (Texas Instrument). The amplitude, frequency, and phase of the sinusoid wave evoked by this system can be adjusted. A kind of sound wave which is the same with people’s ear can be achieved by transforming that sinusoid wave into analog signals then outputing it through earphone. Design process of hardware and programming idea of software of this application system are given in details in this paper. It is an assumption based on learning the keystone of tinnitus and is enlightened by shelter therapeutics. It is expected to be contributing to tinnitus treatment.In the foreword of this paper, the background and purpose of the thesis are expounded. The whole frame and design idea of the application system are also given.In the first chapter, basic information of DSP CMOS chip is given and so the application method using C language.In the second chapter, how to realize the whole hardware circuit are given in details, including the design of system clock, interface design between DSP and memorizers (RAM, EPROM), D/A conversion circuit, logic circuit and design of keystroke & display module, and also anti-jamming measures while making printed circuit board.The third chapter is dealing with software. It mainly introduces the programming idea and realization of each module, and explains their functions, especially introduces the settings of system initialization and primary registers in details.The last part of this paper draws a conclusion. It summarizes the design scheme of this system and points out the shortage and improvement of this system, and finally indicates the prospect of the system.更多还原