毕业论文 汽车倒后防撞报警器的设计分析.doc
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毕业论文 汽车倒后防撞报警器的设计分析,摘要本设计从实验研究分析的角度，分析了汽车倒车防撞系统的基本设计原理以及目前国内外此类防撞系统存在的问题。较详细的介绍一种超声波测距系统以及根据该系统设计，研制的汽车倒车防撞报警器，它能自动检测车尾障碍物的距离。当达到极限位置的时候，它能发出声光报警，提醒司机刹车。设计采用国内生产厂家的通用元件，成本低，性能可靠，有利...
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摘要
本设计从实验研究分析的角度，分析了汽车倒车防撞系统的基本设计原理以及目前国内外此类防撞系统存在的问题。较详细的介绍一种超声波测距系统以及根据该系统设计，研制的汽车倒车防撞报警器，它能自动检测车尾障碍物的距离。当达到极限位置的时候，它能发出声光报警，提醒司机刹车。设计采用国内生产厂家的通用元件，成本低，性能可靠，有利于推广。超声波距离传感器采用压电元件锆钛化铅，一般称为RZT，这种传感器的特点在于具有方向性，汽车所用的倒车声纳系统利用超声波距离传感器的“回声”现象制成的，倒车时向车辆后方发射超声波，测定超声波遇到障碍物后返回的时间，就可以得到车到障碍物的距离。在此要感谢王老师对我的指导，感谢同组人的合作及帮助过我的同学。由于编者水平有限,书中的错漏在所难免，恳请读者批评指正。
关键字：超声波 汽车倒车 防撞 报警器 传感器
ABSTRACT
The basic designing principle of the automobile anticollisionsystem and the problems existed in the domestic and internationalare analyzed. In this paper, Not only ultrasonic range meteringsystem also principle ,methods and procedures of the designaccording to the design were introduced. The car’ back upanticollision alarm is studied. When the distance reaches the limitpoint, the alarm can give out sound and Light alarm,reminding drivers to brake.The design includes sending,receiving and alarm.Signal is sent and received by ultrasonic transducer,which isequipped with directivity. piezoelectric element is used ,generallycalled RZT. In anticollision circuit, acousto-optic anticollisionis applied for voice alarm. This designing adopts the commoncomponent of domestic manufacturers, with low costs, reliableperformance, and it is easy to be popularized.
Key words: ultrasonlccar’back up anticollision alarmsensor
ABSTRACT
The basic designing principle of the automobile anticollisionsystem and the problems existed in the domestic and internationalare analyzed. In this paper, Not only ultrasonic range meteringsystem also principle ,methods and procedures of the designaccording to the design were introduced. The car’ back upanticollision alarm is studied. When the distance reaches the limitpoint, the alarm can give out sound and Light alarm,reminding drivers to brake.The design includes sending,receiving and alarm.Signal is sent and received by ultrasonic transducer,which isequipped with directivity. piezoelectric element is used ,generallycalled RZT. In anticollision circuit, acousto-optic anticollisionis applied for voice alarm. This designing adopts the commoncomponent of domestic manufacturers, with low costs, reliableperformance, and it is easy to be popularized.
Key words: ultrasonlccar’back up anticollision alarmsensor
目录
第一章 绪论 1
1.1 选题意义 1
1.2 汽车倒后防撞报警器的研究现状 1
1.3本论文的特色 2
第二章 报警器的相关技术介绍 3
2.1传感器类型的选择 3
2.1.1传感器的主要类型 3
2.1.2 倒车过程中选用的传感器 5
2.2测距原理 5
2.2.1 倒车过程中的测距原理 5
第三章 报警器的硬件电路设计 7
3.1 倒车过程中的防撞报警器的硬件设计 7
3.1.1整体设计 7
3.1.2超声波发射电路 7
3.1.3超声波接收电路 8
3.1.4筛选电路 9
3.1.5整形电路 9
3.1.6 语音录音电路 10
3.1.7放音电路 11
3.1.8 总电路图 12
第四章 报警器的软件设计 15
4.1 倒车过程中的防撞报警软件设计 15
第五章 结论与展望 19
5.1 结论 19
5.2 展望 19
致谢 21
参考文献 23
附录 25
本设计从实验研究分析的角度，分析了汽车倒车防撞系统的基本设计原理以及目前国内外此类防撞系统存在的问题。较详细的介绍一种超声波测距系统以及根据该系统设计，研制的汽车倒车防撞报警器，它能自动检测车尾障碍物的距离。当达到极限位置的时候，它能发出声光报警，提醒司机刹车。设计采用国内生产厂家的通用元件，成本低，性能可靠，有利于推广。超声波距离传感器采用压电元件锆钛化铅，一般称为RZT，这种传感器的特点在于具有方向性，汽车所用的倒车声纳系统利用超声波距离传感器的“回声”现象制成的，倒车时向车辆后方发射超声波，测定超声波遇到障碍物后返回的时间，就可以得到车到障碍物的距离。在此要感谢王老师对我的指导，感谢同组人的合作及帮助过我的同学。由于编者水平有限,书中的错漏在所难免，恳请读者批评指正。
关键字：超声波 汽车倒车 防撞 报警器 传感器
ABSTRACT
The basic designing principle of the automobile anticollisionsystem and the problems existed in the domestic and internationalare analyzed. In this paper, Not only ultrasonic range meteringsystem also principle ,methods and procedures of the designaccording to the design were introduced. The car’ back upanticollision alarm is studied. When the distance reaches the limitpoint, the alarm can give out sound and Light alarm,reminding drivers to brake.The design includes sending,receiving and alarm.Signal is sent and received by ultrasonic transducer,which isequipped with directivity. piezoelectric element is used ,generallycalled RZT. In anticollision circuit, acousto-optic anticollisionis applied for voice alarm. This designing adopts the commoncomponent of domestic manufacturers, with low costs, reliableperformance, and it is easy to be popularized.
Key words: ultrasonlccar’back up anticollision alarmsensor
ABSTRACT
The basic designing principle of the automobile anticollisionsystem and the problems existed in the domestic and internationalare analyzed. In this paper, Not only ultrasonic range meteringsystem also principle ,methods and procedures of the designaccording to the design were introduced. The car’ back upanticollision alarm is studied. When the distance reaches the limitpoint, the alarm can give out sound and Light alarm,reminding drivers to brake.The design includes sending,receiving and alarm.Signal is sent and received by ultrasonic transducer,which isequipped with directivity. piezoelectric element is used ,generallycalled RZT. In anticollision circuit, acousto-optic anticollisionis applied for voice alarm. This designing adopts the commoncomponent of domestic manufacturers, with low costs, reliableperformance, and it is easy to be popularized.
Key words: ultrasonlccar’back up anticollision alarmsensor
目录
第一章 绪论 1
1.1 选题意义 1
1.2 汽车倒后防撞报警器的研究现状 1
1.3本论文的特色 2
第二章 报警器的相关技术介绍 3
2.1传感器类型的选择 3
2.1.1传感器的主要类型 3
2.1.2 倒车过程中选用的传感器 5
2.2测距原理 5
2.2.1 倒车过程中的测距原理 5
第三章 报警器的硬件电路设计 7
3.1 倒车过程中的防撞报警器的硬件设计 7
3.1.1整体设计 7
3.1.2超声波发射电路 7
3.1.3超声波接收电路 8
3.1.4筛选电路 9
3.1.5整形电路 9
3.1.6 语音录音电路 10
3.1.7放音电路 11
3.1.8 总电路图 12
第四章 报警器的软件设计 15
4.1 倒车过程中的防撞报警软件设计 15
第五章 结论与展望 19
5.1 结论 19
5.2 展望 19
致谢 21
参考文献 23
附录 25
