论文总字数：24616字

摘 要

人工智能是近年来的热点话题，而语音识别技术更是备受人们的关注。说话作为一种最便捷、最直接的的交流方式，若是将它使用在机器上，完全可以避开了手动操作直接使用语音向计算机下达命令，而这无疑会使得人和机器的交互更加方便简单，这也将是一个很好的发展前景，并且在人们生活和生产中的各大领域得到了大面积的使用。科技的发展无疑便捷了人们的生活，使得人们在生活中原本需要大力气来完成的许多活动能使用机械来取代，极大的节省了劳动力也降低了生产成本，但是生产方式的改变随着科技的发展也逐渐暴露出来一些缺点，其中最大的缺点便是不具有灵活性。随着科学的进步，人们的生活水平也得到了很大的提高，而旅行和远距离的出行使得现在汽车已经成为人们家庭生活中所必不可缺的部分，随着汽车需求量的逐步增大，促进了汽车行业的飞速发展，而汽车的更新换代也保障了人们更加便捷的生活。尽管当代汽车的性能得到了很大的增强，但是还是需要人们手动进行操作，对于导航仪的控制操作相对复杂。在全球进入智能化的今天，这无疑无法满足人们的需求，因此更加智能化，更加方便的新型汽车的研究也提上了日程。由于人们的活动范围逐渐扩大，地图导航受到了人们的青睐。本论文的题目是车载导航系统语音识别技术的研究与实现，主要是对语音输入进行识别出来， DSP 芯片实现对语音信号接收和处理，并由之作为主控制芯片并为其进行电路设计，以实现对系统功能的响应。驾驶员靠说话的方式输入目的地信息，随后系统进行分析预处理，并对其输入进行模型匹配和分析，得出结果再结合电子地图给出最好的行车路线，且将路线的大致方向通过喇叭播放出来，使得驾驶员对行车路线的情况进行有所了解。驾驶员通过说话来下达指令，彻底的将驾驶员的双手解放了，这样有利于驾驶员在行车驾驶的途中注意力更加集中，也从侧面提高了汽车的安全性能。本论文首先介绍在车载语音导航领域的发展历程和研究前沿的成果。接着对语音识别分析，叙述语音识别的过程和实现时所遇到的问题。最后则是对系统相关的硬件电路和软件电路进行合理的设计，并进行仿真模拟得出结论。

本次设计是以 STC89C52 单片机作为控制核心，进行程序的烧写，负责处理信号的输入和输出，再加上LD3320语音芯片代替了原本的DSP芯片进行语音识别。由模数转换模块、语音模块、传感模块以及按键输入模块等组成系统，来实现语音指令控制、屏幕亮度自动调节、人体红外感应开关以及疲劳驾驶报警提醒等功能。STC89C52单片机芯片作为控制核心； LD3320语音芯片负责语音模块的分析处理，完成对语音输入信号的处理分析；使用 LCD1602芯片作为显示模块，以用来显示相应的时间参数、亮度参数等级等系统输出的内容；而系统的按键模块则是作为备用方案，当语音输入存在问题时，可实现对系统的手动操作控制。最后，对STC89C52单片机C 语言编程烧写，用以实施控制，以实现设计所要求的功能。

关键词：语音识别；车载导航；STC89C52；LD3320

Abstract

Artificial intelligence has been a hot topic in recent years, and speech recognition technology has received much attention. Speaking is the most convenient and direct way of communication. If it is used on a machine, it can completely avoid the manual operation and directly use voice to issue commands to the computer. This will undoubtedly make the interaction between human and machine more convenient and simple. This will also be a good development prospect, and it has been widely used in all major areas of people's lives and production. The development of science and technology has undoubtedly facilitated people's lives, so that many activities that people need to work hard to complete in their lives can be replaced by machinery, which greatly saves labor and reduces production costs. The development has gradually exposed some shortcomings, the biggest shortcoming of which is the lack of flexibility. With the advancement of science, people's living standards have also been greatly improved, and travel and long-distance travel have made cars now an indispensable part of people's family life. With the gradual increase in demand for cars It has promoted the rapid development of the automotive industry, and the replacement of automobiles has also ensured a more convenient life for people. Although the performance of contemporary cars has been greatly enhanced, it still requires people to manually operate, and the control operation of the navigator is relatively complicated. In today's globalization of intelligence, this will undoubtedly fail to meet people's needs, so the research on new cars that are more intelligent and more convenient is also on the agenda. As the range of people's activities is gradually expanding, map navigation has been favored by people. The topic of this thesis is the research and implementation of the voice recognition technology of the car navigation system, which mainly recognizes the voice input. The DSP chip realizes the reception and processing of voice signals, and uses it as the main control chip and designs the circuit Achieve response to system functions. The driver enters the destination information by speaking, and then the system performs analysis and preprocessing, and performs model matching and analysis on its input. The result is combined with the electronic map to give the best driving route, and the general direction of the route is passed The horn plays out, so that the driver can understand the driving route. The driver gives instructions by speaking, completely liberating the driver's hands, which is conducive to the driver's concentration during driving, and improves the safety of the car from the side. This paper first introduces the development history and research frontier achievements in the field of vehicle-mounted voice navigation. Then analyze the speech recognition, describe the process of speech recognition and the problems encountered in the realization. Finally, the hardware circuit and software circuit related to the system are reasonably designed, and simulation is conducted to draw conclusions.

This design uses STC89C52 single-chip microcomputer as the control core, program programming, responsible for processing signal input and output, plus LD3320 voice chip instead of the original DSP chip for voice recognition. The system is composed of analog-to-digital conversion module, voice module, sensor module and key input module to realize functions such as voice command control, screen brightness automatic adjustment, human body infrared sensor switch and fatigue driving alarm reminder. The STC89C52 single-chip chip is used as the control core; the LD3320 voice chip is responsible for the analysis and processing of the voice module to complete the processing and analysis of the voice input signal; the LCD1602 chip is used as the display module to display the corresponding time parameters, brightness parameter levels and other system output content ; The key module of the system is used as a backup solution, when there is a problem with the voice input, the manual operation control of the system can be realized. Finally, programming the C language of STC89C52 single chip microcomputer to implement control to realize the functions required by the design.

Key Words： voice recognition; car navigation; STC89C52; LD3320

目录

第1章 绪论1

1.1 研究背景及意义 1

1.2 研究现状和发展前景2

1.3 章节小结4

第2章 语音识别的基本理论5

2.1基本原理5

2.2语音识别6

2.2.1 汉语语音6

2.2.2 语料库6

2.2.3 语音分析7

2.3章节小结11

第3章 硬件和软件设计12

3.1自动调节模式12

3.2手动按键模式12

3.3方案设计12

3.4单片机STC89C5213

3.5红外人体感应芯片14

3.6显示模块电路设计15

3.7软件设计15

3.8导航仪整体电路图16

3.9章节小结17

第4章 实践和仿真18

4.1系统仿真18

4.2部分程序的介绍18

4.3章节小结20

第5章 结论与展望21

参考文献22

附录A23

致谢24

第1章 绪论

1.1 研究背景及意义

随着科学技术的发展，计算机逐步变成了人们生产和生活中的关键角色而且在人们的生产生活中发挥着重大的作用。计算机技术得到了快速的发展，改变了人们之前面对面的交流沟通方式，实现了足不出户也可以流畅的自由的交谈，有力地推动人类社会向前的发展，开拓了很好的发展前景。科学技术的飞速发展，使得人们生活质量越来越好，人们对计算机技术的要求越来越高，为了满足人们的需求，向更加便捷的人机交互方式转变，语音识别技术就应运而生。衣、食、住、行是人们生产生活的四大基本要素，当前面三个要素得到了基本的满足时，排在第四的行也逐渐被人们所重视。随着社会的发展，科技的进步，带动了人类之间的交流，人们并不满足于自己所熟悉的小区域，而开始向更大的区域进行探索，这种变化无疑需要迫切改变落后的出行方式，因此人类创造了许多更加方便快捷的交通用具 (如汽车、飞机、轮船等等)，极大的方便了人们的出行和工作。但人们的研究步伐不会就此停止，对交通工具的深入研究成为了必然。

技术的飞速发展，使得汽车已经成为了人们生产生活中的一种关键的东西。随着汽车的发展也带动了道路交通设施的飞速发展，人们往来于各个城市进行交流沟通也越来越方便了。这也让人们的视野不再局限于自己所熟悉的那一小块区域，而更热衷于探索新的地方。但是，时代的变迁，很多的地图都没能得到很好的更新，往往会误导人们走错方向。车载导航仪的出现解决了这样的问题，它通过电子显示屏将详细的地图进行直观的显示输出。因为是电子地图，所以能更快的进行更新，以便驾驶员能正确的分清方位，方便实惠使得车载导航仪得以迅速普及。车载导航是通过卫星定位实现的，将驾驶员所在位置进行输出显示，并以地图这种直观的显示方式引导使用者到达目的地。GPS 导航仪逐步普及已经成为现代汽车的必配装备，拥有了它就不怕迷路了。就目前情况来看，很多 GPS 导航仪在设计的功能上无法完全的符合人们的常规驾驶习惯，因为这些导航仪很多是通过点击按钮或者触摸屏幕来进行手动操作的，但是在行车过程中不便手动操作车载导航仪，需要注意观察交通情况，因此通过语音识别技术对导航仪控制成为新的研究方向。通过说话的方式对导航仪下达指令，避免了手动操作，实现语音控制，使得驾驶员能更加集中在行车驾驶上注意力，使汽车的设计更为人性化，方便了驾驶员，也提高驾车行驶的安全性。

请支付后下载全文，论文总字数：24616字