语音识别控制小车设计

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1、基于语音识别的智能小车摘　要随着计算机技术、模式识别和信号处理技术及声学技术等的发展，使得能满足各种需要的语音识别系统的实现成为可能。近二三十年来，语音识别在计算机、信息处理、通信与电子系统、自动控制等领域中有着越来越广泛的应用。本设计是语音识别在控制领域的一个很好实现，它将原本需要手工操作的工作用语音来方便地完成。语音识别按说话人的讲话方式可分为孤立词(IsolatedWord)识别、连接词(ConnectedWord)识别和连续语音(ContinuousSpeech)识别。从识别对象的类型来看，语音识别可以分为特定人(SpeakerDependent)语音识别和非特定人

2、(SpeakerIndependent)语音识别。本设计采用的识别类型是特定人孤立词语音识别。本系统分上位机和下位机两大方面。上位机利用PC上MATLAB强大的数学计算能力，进行语音输入、端点监测、特征参数提取、匹配、串口控制等工作，根据识别到的不同语音通过PC串口向下位机发送不同的指令。下位机是单片机控制的一个小车，单片机收到上位机传来的指令后，根据不同的指令控制小车完成不同的动作。该设计对语音识别的现有算法进行了验证和实现，并对端点检测和匹配算法进行了些许改进。本设计达到了预期目标,实现了所期望的功能效果。关键词：MATLAB，语音识别，端点检测，LPC，单片机，电机控

3、制SMARTCARGASEDSPEECHRECOGNITIONABSTRACTWiththedevelopmentofcomputertechnology,patternrecognition,signalprocessingtechnologyandacoustictechnologyetc,thespeechrecognitionsystemthatcanmeetthevariousneedsofpeopleismorepossibletoachieve.Thepastthreedecades,thevoicerecognitioninthefieldofcompute

4、r,informationprocessing,communicationsandelectronicsystems,automaticcontrolhasincreasinglywiderangeofapplications.Speechrecognitionbythespeaker'sspeechcanbedividedintoisolatedword(IsolatedWord)identification,conjunctions(ConnectedWord)andcontinuousspeechrecognition(ContinuousSpeech)identif

5、ication.Identifyingthetypeofobjectfromthepointofview,thevoicerecognitioncanbedividedintoaspecificperson(SpeakerDependent)speechrecognitionandnon-specific(SpeakerIndependent)speechrecognition.Thisdesignusestheidentificationtypeisaspecificpersonisolatedwordspeechrecognition.Thisdesignisofago

6、odimplementationofspeechrecognitioninthecontrolfield,itdoestheworkthatwouldotherwiserequiremanualoperationbythevoiceofpeopleeasily.Thissystemincludestwomajoraspects:thehostsystemandtheslavesystem.ThehostsystemusetheMATLABonthecomputerwhichhaspowerfulmathematicalcomputingabilitytodotheworko

7、fvoiceinput,endpointmonitoring,featureextraction,matching,identificationandserialcontrol,thenitsenddifferentcommandsthroughthePCserialporttoslavesystemaccordingdifferentrecognisedvoice.Theslavesystemisacarcontrolledbyasingle-chipmicro-controller.Itcontrolsthec