D题 声音定位系统.doc

题目：声音定位系统（D题） 摘要 : 为了满足声音定位系统的设计要求，进行了各单元模块电路方案的比较论证及确定，本设计系统采用低功耗16位单片机、MSP430F169、两块TI高速作为主控芯片，其中核心部分的三个主要功能模块是控制模块、声响模块和声音接收模块，四个500HZ声音的采集由一块单片机进行控制，速度快，计算结果精准；声响模块的发声由另一块单片机产生一个500HZ的声音信号，通过功放电路，驱动低音扬声器发声，功耗低，调节灵活；声音接收模块由LM358搭建的前级放大电路和LM567搭建500HZ鉴频电路组成。本设计数据处理主要用取差值查表的方法来定位，这种测算方法相对于其它算法具有速度快，编程简单的优点，而且经过测试实验精确度完全满足题目3cm的要求。最后的实验表明，系统完全达到了设计要求，完成题目的大部分的要求。 关键词： 500HZ声音采集、鉴频、功率放大、查表算法 Abstract: In order to satisfy the design requirements of the sound localization system, The program of each unit module circuit demonstration and determine,This design system uses low-power 16-bit MCU,MSP430F169 and TI high-speed as the main chip,The three main functional modules of core part is control module, sound modules and sound receiver module,The 500HZ sound collected by a MCU, fast, precise, accurate calculation;The sound of sound module to produce 500HZ sound signal by MCU.Through the power amplifier circuit driven bass speaker sound, low power consumption and flexible adjustment;the sound receiver module structures preamplifier circuit by LM358 and LM567 structures 500HZ frequency discriminator circuit.The sound receiver module preamplifier circuit built by LM358 and LM567 built 500HZ frequency discriminator circuit. Data processing of the design is mainly used to take the difference between the look-up table method to locate,This calculation method has a fast and simple programming advantages compared to other algorithms, Tested the accuracy of fully satisfy the subject requirements 3cm. The final experiments show that the system fully meets the design requirements to complete the subject requirements. Keywords: 500HZ sound acquisition, frequency, power zoom, look-up table algorithm 目录 1 方案的论证与讨论 3 1.1 设计任务与要求 3 1.1.1 设计任务 3 1.1.2 基本要求 3 1.1.3 发挥部分 4 1.2 设计分析 4 1.3 各模块方案论证与选择 5 1.3.1 声音信号发生模块 5 1.3.2 声音信号发射模块 5 1.3.3 声音信号接收模块 5 1.3.4 声音信号放大模块 5 1.3.5 声音信号鉴频模块 6 2 理论分析与计算 6 2.1 声响模块 6 2.2 声音接收发大器 6 2.3 数据处理原理 7 3 电路与系统设计 7 3.1 声响模块电路 7 3.2 声音接收放大器电路 8 3.2.1 声音接收电路